Dissertations / Theses on the topic 'Inhibiteurs des protéines kinases – Conception'
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Van, Hijfte Nathalie. "Conception et synthèse de nouveaux inhibiteurs potentiels de la protéine mTOR." Le Havre, 2011. http://www.theses.fr/2011LEHA0007.
Full textMammalian target of Rapamycin (mTOR) is a protein kinase, involved in the PI3K/Akt/mTOR signaling pathway, which controls cell growth, proliferation, and cellular survival. This pathway is often deregulated in cancer, and there is a great interest in developing drugs that target the protein mTOR. During the last ten years, a new inhibition mode has been highlighted: it consists in the competitive and selective inhibition of the catalytic site of mTOR. The aim of this PhD project was to design and synthesize new compounds, from a common tricyclic scaffold, able to interact with the ATP pocket of mTOR. The synthesis of a new scaffold has also been determined during this work. Biological evaluations were performed in laboratories of our industrial partner (Janssen) as well as the National Cancer Institute (NCI)
Leproult, Émeline. "Évaluation des protéines kinases en tant que cibles thérapeutiques : application à la conception rationnelle d'inhibiteurs allostériques covalents." Strasbourg, 2011. http://www.theses.fr/2011STRA6112.
Full textThe protein kinase family is one of the most pursued classes of therapeutic targets in the pharmaceutical industry. It is also one of the most challenging families since many kinase inhibitors are rejected from clinical trials, because of either selectivity problems or a lack of efficacy. The recent success of a few covalent inhibitors of EGFR kinase indicates that this new generation of inhibitors could solve both of these problems at the same time, by reacting with an unconserved cysteine residue of the ATP binding site using an electrophilic group attached to the ligand, and providing high affinity. In order to investigate the opportunities for the design of covalent inhibitors addressing other members of the kinase family, our main focus consisted in automatically identifying all human kinases bearing a reactive cysteine in their binding site. Since the shape of the binding site depends on the kinase conformation, we performed a preliminary study to distinguish the different adopted conformations among all the available kinase 3D structures. With our results in hand, we designed a inhibitor liable to covalently bind and inactivate KIT kinase by reacting with a cysteine residue specific to a small kinase subset and accessible only in the inactive “DFG out” kinase conformation that KIT can adopt. The covalent bond between our inhibitor and KIT was confirmed by mass spectrometry. Activity assays on a large panel of kinases confirmed the affinity of this inhibitor for KIT and its very good selectivity profile. Finally, this work gives insights on how to design a new generation of highly selective and efficient kinase inhibitors
Coulibaly, Wacothon Karime. "Conception, synthèse de bis-(5-arylidène-imidazolinone) et de bis (5-arylidène thiazolidinone) dérivés du modèle de la pentamidine (pour la malaria) et évaluations biologiques." Rennes 1, 2012. http://www.theses.fr/2012REN1S087.
Full textThis manuscript describes the synthetic development of symmetric heterocyclic systems miming the pentamidine. The first part is a current inventory of the malaria, in particular on the physiopathological aspects, the drugs and the resistance. Then are described protein kinases, their role in cells and their interest in the discovery of new inhibitors of protein kinases for the development of new drugs. Finally the end of this part concerns the description and the use of the microwave technology as useful tool for thermal activation in organic synthesis. The second part is the synthetis of bis-(5-arylidène imidazolinone)bridged and symmetric diamines using solventless microwave reaction conditions. The spacer-arm between the two heterocyclic entities are diamines as ethylenediamine, piperazine and 1,4-bis(3-aminopropyl piperazine. This approach was then extended to the synthesis of bis(5-arylidène thiazolidinone)diamines using the same spacer-arms in this third part. Then, the use of a one-pot three component reaction under microwave irradiation allowed to the preparation of new bis-(5-arylidène rhodanine)diamines and 5-arylidène thiazolidine-4-ones functionalized in position N-3 with various alkylamino chains. Finally the biological activity of all of these compounds have been evaluated for a structure/activity relationship (SAR) study: - inhibition of proteins kinases (CDKs, DYRKs, CLKs, GSK-3, PI3k, etc. ) - in vitro antiproliferative activities on cells, - in vitro assessment of antimalarial activity. Several molecules have been identified as active with IC50 < 0. 1 mM for DYRK1A and IC50 ~ 100 mM for in vitro antimalarial activity
Esvan, Yannick. "Conception et synthèse de nouveaux composés hétéroaromatiques inhibiteurs potentiels de kinases." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22743.
Full textIn 1950’s protein kinases were found to play a critical role in cell signaling, rising strong research potential for this enzyme family. Initially investigated for their implications in cancerogenesis they were more recently found to be involved in a wide variety of diseases including neurodegenerative pathologies. Herein will be presented two research projects that offer bright new perspectives for the inhibition of kinases involved whether in neurodegenerative diseases or cancers.First, the design and synthesis of new pyrido[3,4-g]quinazoline derivatives will be described as well as their protein kinase inhibitory potencies toward five CMGC family members (CDK5, CK1, GSK3, CLK1 and DYRK1A) that are known to play a potential role in Alzheimer’s disease. The interest for this original tricyclic heteroaromatic scaffold as modulators of CLK1/ DYRK1A activity was validated by nanomolar potencies. CLK1 co-crystal structures with two inhibitors revealed the binding mode of these compounds within the ATP-binding pocket and led to the synthesis of new diversely substituted pyrido[3,4-g]quinazolines.Then the synthesis of a new derivative of the staurosporine aglycon (K252c), in which the lactam ring was replaced by a pyrazole moiety, will be depicted. The resulting indolopyrazolocarbazole inhibited Pim isoforms 1–3 whereas it did not impair the activity of two known targets of K252c, protein kinase C isoforms α and γ . The lead compound exhibited same cytotoxic activity as K252c toward both human leukemia and colon carcinoma cell lines (K562 and HCT116), strongly suggesting that this new scaffold deserves further investigations for treatment of malignancies associated with kinases activities
Visseq, Alexia. "Conception et synthèse d’inhibiteurs sélectifs de protéines kinases pour le traitement de l’allodynie mécanique." Thesis, Université Clermont Auvergne (2017-2020), 2019. http://www.theses.fr/2019CLFAC048.
Full textChronic pain is a global public health priority which affects more than 20% of Europeans. Mechanical allodynia, a pain in response to normally innocuous stimuli, is one of the most prevalent pain symptoms. Despite intensive research toward the study of pain mechanisms, currently available treatments of pain are not always effective, and can produce side-effects. In this context, the aim of the project is to design, synthesize and evaluate selective inhibitors of protein kinases for the treatment of mechanical allodynia. During this PhD work, new selective inhibitors of the protein kinase p38α has been discovered. This protein kinase is known for its implication in chronic pain and mechanical allodynia. A structure-activity relationship study was performed to identify the important structural features allowing a gain of activity of molecules in vitro and in vivo using an animal model. The best compounds showed submicromolar IC50 values toward p38α and a strong inhibition of mechanical allodynia in vivo
Ravez, Séverine. "Conception, synthèse et évaluation pharmacologique d’hétérocycles azotés à visée anticancéreuse." Thesis, Lille 2, 2014. http://www.theses.fr/2014LIL2S018/document.
Full textAccording to the International Agency for Research on Cancer, cancer is the first cause of death in France with about 150 000 deaths estimated in 2012. This disease is characterized by anarchistic and uncontrolled proliferation of cells that escape control mechanisms. Currently, the anticancer drugs target mainly the cancerous cells that overexpress proteins, such as growth factor receptors with tyrosine kinase activity.Our work is mainly carried on four of these receptors: EGFR (Epidermal Growth Factor Receptor), VEGFR (Vascular Endothelial Growth Factor Receptor), PDGFR (Platelet-Derived Growth Factor Receptor) and c-Kit receptor. Several heterocycles (quinazoline, benzotriazine, thienopyrimidine) differing by their aniline or aryloxy moiety in C-4 position were designed, synthesized and evaluated. Among these products, the 4-aryloxyquinazolines substituted by aminoalkoxy chains in C-7 position have the characteristic to be potent inhibitors of VEGFR, PDGFR and c-kit receptor with high anti-angiogenic potency. Simultaneously, 2-aminoquinazoline derivatives were designed. These compounds substituted by various anilines in C-4 position showed interesting antiproliferative activity through their intercalation between the pairs of DNA bases
Braka, Abdennour. "Prédiction de la cinétique des inhibiteurs de protéines kinases et de leur affinité par docking flexible." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2016.
Full textIn a drug design project, improving the prediction of affinity is still an issue despite the considerable efforts made in this direction. In addition, binding kinetic constants are of major interest for the discovery of new drugs, in particular at the early stage of molecules optimization to better evaluate their tolerance and efficacy. Due to the recent emergence of the importance of binding kinetics, methods of kinetic rates prediction remain scarce and no efficient computational approach has still been developed to correctly estimate kinetic parameters.In order to challenge these two problematics, the first part of this thesis consists in the development of new methods that allow, first, to improve the prediction of affinity by a flexible docking and, second, to predict the ligand binding/unbinding pathways and binding kinetic rates (kon and koff) by enhanced molecular dynamics simulations.In the second part of this thesis, we have designed novel inhibitors of LIM kinases, emerging targets involved in several pathophysiologies including neurofibromatosis and cancer. Our compounds have good affinities and selectivities in vitro, and excellent activities and tolerances evaluated on cellular tests
Moine, Esperance. "Conception, synthese et évaluation de nouvelles imidazoazines anti-apicomplexes à visée thérapeutique." Thesis, Tours, 2015. http://www.theses.fr/2015TOUR3802.
Full textApicomplexan parasites are ubiquitous and have a strong incidence in veterinary and human medicine. Some of them, like Plasmodium falciparum, causing malaria, or Toxoplasma gondii, causing toxoplasmosis, are matter of public health concern. The existing therapies may have limited efficiency, high toxicity, and may lead to resistance, highlighting the necessity of new more specific approaches. In this context, we have developed two approaches to inhibit Apicomplexa: -the synthesis of biphenylimidazoazines with broad-spectrum and efficient at the micromolar range on five different apicomplexan parasites in vitro. -the synthesis of imidazo[1,2-b]pyridazines specifically targeting a kinase protein (CDPK1) of T. gondii and efficient at the submicromolar range on the parasite in vitro. More than 90% diminution of parasite burden in mice and short term safety make these imidazo[1,2-b]pyridazines good therapeutic candidates
Juillet, Charlotte. "Conception, synthèse et évaluation pharmacologique d’analogues simplifiés de métabolites marins, inhibiteurs de la kinase Aurora B, à visée anticancéreuse." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASF019.
Full textThis manuscript describes the design, synthesis and biological evaluation of oroidin analogs. Oroidin is a monomer of benzosceptrin C, belonging to the pyrrole-2-aminoimidazole family, isolated from marine sponges. The simplification and structural diversification approaches led us to the identification of a non-natural hit displaying selective inhibitory activity against the kinase Aurora B. This kinase plays a key role in cell division and its inhibition leads to severe mitotic abnormalities. Aurora B is found to be up-regulated in many human cancers, indicating that this kinase is a cancer-relevant target. The objective of the study at the interface between chemistry and biology is to optimize the discovered hit into a lead. The hit scaffold is divided in three parts: the 4,5-dibromopyrrole, the imidazo[1,2-a]pyrimidine and the alkyne moieties. After the first introductive chapter, chapters II to IV are dedicated to the pharmacomodulations of each part. We finally managed to synthesize eighty-two analogs for in vitro evaluations toward Aurora B and a panel of kinases involved in diverse human pathologies. Several compounds were found to be very active with IC50 down to 34 nM, displaying a 150-fold higher activity than the initial hit. The last chapter discusses the mode of action of the most active inhibitors from the hit expansion. The enzymatic kinetic assays revealed an uncommon mode of action with allosteric inhibitors (type IV) of Aurora B. Immunostaining experiments highlighted the typical effects of Aurora B inhibition in treated cells as well as its quantification. At last, molecular docking study with the best inhibitor showed the most probable allosteric binding pocket of Aurora B, providing crucial support in hit-to-lead optimization. In conclusion and perspectives, the efforts to be pursued in order to improve physicochemical and pharmacokinetic properties in the lead-to-candidate process are pointed
Berabez, Rayan. "Conception et validation préclinique de nouveaux inhibiteurs de LIMK pour le traitement de la Neurofibromatose de type 1." Electronic Thesis or Diss., Orléans, 2023. http://www.theses.fr/2023ORLE1070.
Full textNeurofibromatosis type 1 (NF1) is a genetic disease characterized by the development of cutaneous neurofibromas (cNF) (benign tumors) located at nerve endings. LIM kinases (LIMKs), enzymes responsible for cytoskeleton dynamics, have emerged in recent years as valid therapeutic targets for this disease. These enzymes are overactivated in several pathologies including NF1, glioblastoma or osteosarcoma. A medicinal chemistry project was therefore initiated with the aim of designing new selective inhibitors of LIMKs. Initially, structure-activity relationship (SAR) studies were conducted on the 3 main pharmacomodulation sites of the pyrrolopyrimidine-type compounds previously developed by our team. The development of various synthetic strategies was undertaken, allowing efficient access to a large number of final products (84). Optimization of the aniline portion of the compounds led to the synthesis of 49 LIMKs inhibitors, with inhibition constants lower than 5 nM for several derivatives. Subsequently, an optimized 15 steps synthetic route was developed to replace the previously unchanged central ring 3,6-dihydropyridine with a derivative of 1-aminocyclohex-3-ene-1-carboxylic acid. Finally, a new series of inhibitors was developed by replacing the heterocyclic pyrrolo[2,3-d]pyrimidine base by 7-azaindole derivatives. Improved LIMK vs. ROCK selectivity was observed among the 23 obtained products. Following extensive in vitro evaluation of our best inhibitors on several cell lines, two compounds were selected for in vivo trials on an original mouse model of NF1. In parallel, new modes of LIMKs inhibition were developed with the synthesis of an irreversible inhibitor targeting LIMK1, as well as 4 PROTACs that induced LIMKs degradation through the ubiquitin-proteasome system in several cell lines
Pescheteau, Clémentine. "Conception et synthèse d’inhibiteurs duaux de DYRK1A et CLK1, kinases impliquées dans la maladie d’Alzheimer." Electronic Thesis or Diss., Orléans, 2021. http://www.theses.fr/2021ORLE3203.
Full textAlzheimer's disease is the most common form of dementia worldwide. To date, no effective treatment exists despite many ongoing research projects. New therapeutic strategies have emerged, targeting protein kinases involved in neurodegeneration and neuroinflammation, processes leading to diseases of the central nervous system. DYRK1A and CLK1 have been identified as interesting targets against some neuropathologies, and are particularly involved in Alzheimer's disease. In order to design powerful and selective inhibitors of these two kinases, we have synthesized original heterocyclic molecules with aromatic [5-5] and [6-5] core rings. We first continued our team’s studies on imidazo[2,1-b][1,3,4]thiadiazoles and we created a library of original compounds which revealed interesting activities against DYRK1A and CLK1. We optimized the access routes to the most promising dual inhibitors, and their biological evaluations carried out by our collaborators allowed us to identify a molecular hit that will be studied in vivo. We then explored other molecular series by modulating the scaffold of our compounds. Access to the bicycle [1,2,4]triazolo[3,4-b][1,3,4]thiadiazole has been studied to design analogs of our structures. An efficient synthetic methodology of imidazo[1,2-d][1,2,4]thiadiazoles was then developed to reach a variety of molecules with high value potential. Furthermore, the [1,2,4]triazolo[4,3-b]pyridazine scaffold was used, and pharmacomodulations of its substituents allowed us to refine the structure-activity relationships of the designed inhibitors. Finally, innovative structures were developed, such as selective inhibitory macrocycles of our two kinases of interest
Lebeau, Alexandre. "Conception d’inhibiteurs de l’activité tyrosine kinase basée sur la plasticité conformationnelle : applications aux domaines kinase des protéines Axl, Abl et Src." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20250/document.
Full textThe receptor tyrosine kinase Axl was discovered in 1988. Latter on, its involvement in the cancer development was highlighted. Axl is overexpressed in pancreatic cancer and triple-negative breast cancer cell lines. The success of kinase inhibitors (imatinib, erlotinib ...) led us to focus on the design of inhibitors targetting the kinase domain of Axl. As a guide, we modeled the protein-kinase domain in its active and inactive conformations to perform structure-based drug design. The models were then validated by different methods: structural bioinformatics, comparative docking and focused virtual screening. A virtual chemical library was built and docked into Axl models.Then, I synthetized 15 chemical compounds targetting the ‘inactive' conformation of the kinase domain of Axl. However, none were active in an in vitro assay. Then we were interested in the chemistry of 4 and 7-azaindole cores. This work led to the synthesis of 12 ligands among which several showed promising activity against the ‘inactive' conformation of the kinase domains of Abl and Src.Meanwhile, a large-scale screening was published and we used that new data to re-evaluate the modeling of a "DFG-out" inactive conformation of Axl
Champiré, Anthony. "Conception rationnelle, synthèse et évaluation biologique d'inhibiteurs de la voie de signalisation LIMK/ROCK." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2049.
Full textLIMKs are two protein kinases involved in regulating cytoskeleton and microtubule actin dynamics. Their deregulation can play a major role in the onset of several diseases such as neurofibromatosis type 1, cancer or amyotrophic lateral sclerosis.During this collaborative project, we have sought to design both potent and selective LIMKs inhibitors based on one of the most efficient compounds of the day developed by Lexicon Pharmaceuticals.We first worked on the heterocyclic base by replacing the pyrrolo[2,3-d]pyrimidine by different pyridopyrimidines and a triazolopyridopyrimidine. This last modification lead to a directed synthetic methodology study around the Dimroth rearrangement. We then modified the piperazine central ring with a differently substituted 3,6-dihydropyridine or piperidine and varied the substitution at the arylurea. Lastly, we made some further structural changes to the starting pyrrolo[2,3-d]pyrimidine.In conclusion, we have created, using effective synthetic methodology, a wide range of original compounds that have been tested in vitro and in cellulo on our targets.Through this medicinal chemistry project, we now have a better understanding of the structure-activity relationships needed in order to design very promising LIMK inhibitors
Asses, Yasmine. "Conception par modélisation et criblage in silico d'inhibiteurs du récepteur c-Met." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00653609.
Full textPlace, Matthieu. "Méthodologies de synthèses d'hétérocycles bicycliques (6-5) et (5-5). Application à la conception d'inhibiteurs de kinases impliquées en oncologie et dans les maladies du système nerveux central." Thesis, Orléans, 2017. http://www.theses.fr/2017ORLE2056.
Full textSince the early 2000s, precise knowledge of kinome has induced the emergence of novel therapies targeting kinases involved in several kinds of pathologies in oncology and nervous central systems disorders.In order to target original kinases of interest identified in this work, we have developed diversity-oriented synthesis to create new high-valuable heterocycles. We have focused our efforts on the design and functionalization of [6-5] or [5-5] fused ring bicycles. Those chemical species representing a great pathway tocreate competitive inhibitors of ATP; the natural substrate of kinases.First-of-all, we have worked on imidazo[1,2-b]pyridazines and then on [1,2,4]triazolo[4,3-b]pyridazinesscaffolds, to create more active and selective HASPIN kinase inhibitors, a new hot-target in oncology.Then, we have pursued previous laboratory studies on imidazo[2,1-b][1,3,4]thiadiazoles. Based on a well-built methodology, we have synthesized severals DYRK1A and CLK1 kinases inhibitors involved in neurodegenerative disorders, as Alzheimer’s disease. Thus, through original imidazothiadiazoles analogues,we have proposed synthetic methodologies to design these novel heterocycles allowding esay pharmacomodulations.These medicinal chemistry projects have been undertaken to improved knowledge of structure-activityrelashionship, and providing novel strong inhibitors of HASPIN, DYRK1A or CLK1 kinases
Lopez, Ramos Miriam. "Conception et synthèse d'inhibiteurs de la protéine kinase CK2." Paris 5, 2008. http://www.theses.fr/2008PA05P633.
Full textThe protein kinase CK2 is engaged in suppression of apoptosis, and its inhibition helps to restore apoptosis. The Library of the Institut Curie was screened, which led to the discovery of new inhibitors. The aim of the thesis work is to improve the inhibition of these molecules to obtain a biochemical tool to investigate the role of this kinase and a potential drug to treat certain forms of cancer. We have synthesized analogues of hit compounds. Molecular modeling allowed a better understanding of how molecules bind in the active site of the protein. We thus obtained a position in the active site of CK2 for each active compound. Co-crystallization of one of the inhibitors helped validating this model. We also performed virtual screening on a subset of compounds from the library
Bourotte, Maryline. "Synthèse d'inhibiteurs de protéines kinases : approches pharmacochimiques." Strasbourg 1, 2004. https://publication-theses.unistra.fr/public/theses_doctorat/2004/BOUROTTE_Maryline_2004.pdf.
Full textProtein kinases represent one of the largest protein superfamilies which are attractive targets in the search for new therapeutic agents. The human genome encodes for more than 500 members. Protein kinases are the central switches controlling intracellular communication, regulation, and signal transduction. Most cancers are associated with disregulation of protein kinases, usually through genetic mutation that lead either to overexpression, or to constitutive activity. Pathologies and therapies also of other serious diseases are increasingly recognized to involve protein kinases. As a consequence, inhibitors of this family of enzymes may serve as potential therapeutics and as pharmacological tools. On one hand, our work was based on the synthesis and identification of HPrK/P inhibitors. Since deficiency of HPrK/P in B. Subtilis mutants leads to severe growth deficits, inhibitors of the enzyme may constitute a new family of antibiotic drugs. Starting from a specific bis-cationic hit deriving from 3-benzyl-2-aminobenzimidazole, a structure-activity relationship analysis clearly identified specific features needed to HPrK/P inhibition. On the other hand, we focused our efforts on the optimization of a CaMKII inhibitor derived from screening. Thus, we have performed an efficient method using palladium-catalysed cross-coupling reactions for the preparation of 3-aminopyridazines substituted at position 4. Finally, we synthesized and investigated new interesting structural analogues of the Green Fluorescent Protein chromophore (imidazolones, oxazolones, butenolides and pyrrolinones). A study of relationships between compound structure and variation of their fluorescence properties yielded promising fluorescent compounds. Moreover, a new methodology for the synthesis of 2-arylimidazolin-5-ones based on palladium cross-coupling reactions was developed
Benltifa, Mahmoud. "Synthèses de glyco-héterocycles inhibiteurs de la glycogène phosphorylase et de protéine kinases." Lyon 1, 2006. http://www.theses.fr/2006LYO10115.
Full textWhile heterocyclic compounds have found early wide applications because if their broad spectrum of bioactivities, the development of Glycosciences has shown the importance of carbohydrates for Life, and the crucial roles they exert for the normal development of living organisms, or their control based on glycomimics. These reasons explain the topic of this thesis : SYNTHESIS OF GLYCOHETEROCYCLES AS INHIBITORS OF GLYCOGEN PHOSPHORYLASE AND PROTEIN KINASES. The first chapter describes 1,3-dipolar cycloadditions reactions between sugar-based acrylates and cinnamates and such dipoles as trimethylsilyldiazomethane and nitrile oxides. Modest stereoinductions were observed, which were enhanced by using chiral dipoles. Chapter 2 is devoted to cycloadditions between several nitrile oxides and exo-glucals, one hydroximo-lactone or benzoylated -D-glucopyranosyl cyanide. Chapter 3 concerns synthetic routes toward 3-C-glucosyl-1,2,4-oxadiazoles obtained when -D-glucopyranosyl cyanides were converted into amidoximes, then reacted by O-acylation followed by thermal cyclization. The prepared glycomimics were tested as glycogen phosphorylase (GP) and protein kinases (PK) inhibitors. The best GP inhibitor was a glucosyl-spiro-isoxazoline with a 2-naphthyl substituent (Ki : 630 nM). The 5-C-glucosyl-1,2,4-oxadiazoles were better inhibors of GP as compared to their 3-C-glucosyl analogs, as indicated by their Ki (respectively 2,4 and 26,2 M for molecules with a 2-naphthyl substituent). Some compounds inhibited also various PK
Desroses, Matthieu. "Conception, synthèse et évaluation pharmacologique d'aminoquinazolines, inhibiteurs potentiels d'activités tyrosine kinases." Lille 2, 2005. http://www.theses.fr/2005LIL2S026.
Full textThe ErbB/HER growth factor receptor family is constituted by four transmembrane receptors encoded by protooncogenes, c-erbB-1/HER/EGFR, c-erbB-2/neu/HER-2, c-erbB-3/HER-3, c-erbB-4/HER-4 and involved in a wide variety of normal cellular control processes and is also associated with various malignancies, including cancer. Overexpression of EGFR is reported in a variety of human tumors. EGFR signaling impacts on many aspects of tumor biology. Activation of EGFR has been shown to enhance processes responsible for tumor growth and progression, including the promotion of proliferation, angiogenesis and inhibition of apoptosis. Consequently, compounds which inhibit the kinase activity of EGFR are of potential interest as new therapeutic antitumor agents. The middle of the past decade was marked by the discovery of the 4-anilinoquinazolines, a series of potent and selective ATP-competitive inhibitors of EGFR kinase. IressaTM (ZD1839, Gefitinib) and TarcevaTM (OSI774, Erlotinib) are EGFR inhibitors belonging to this class of compounds and are currently in phase III trial. However, IressaTM which target the Non-Small Cell Lung Cancer (NSCLC) failed to improve survival in the overall population and consequently it is crucial to improve the structure of the lead by modifications of side chains in terms of drug delivery and, on the basis of modeling studies, in terms of selectivity. In addition, such structural modifications could induce interesting properties on human prostate cancer which could be induced by EGFR dysfunctions and which suffers from a lack of efficient treatment, particularly in its hormone independent phase. For this purpose, we prepared several 4-aminoquinazolines bearing 7-n. Butoxy and 6-diethylaminoethoxy ethers side chains with modifications at the 4-amino substituent. These compounds have dissymmetric ethers chains, which are poorly studied in the literature. It thus appeared interesting to us to synthesize compounds called isomers of position, having the ethers side chains 6-n. Butoxy and 7-diethylaminoethoxy
Primot, Aline. "Etude de la régulation de deux protéines kinases : : GSK-3 et polo." Rennes 1, 2001. http://hal.upmc.fr/tel-01117984.
Full textLoidreau, Yvonnick. "Synthèse de composés hétérocycliques [6,5,6] polyhétéroatomiques, inhibiteurs potentiels de kinases." Rouen, 2013. http://www.theses.fr/2013ROUES001.
Full textIn this manuscript, we describe the design, synthesis and potential applications of a combinatorial library based on polyheteroatomic [6,5,6] planar tricyclic structure. Initially, a study of different synthetic ways to bicyclic [6,5] precursors was carried out. Upon completion of these scaffolds, the third heterocycle was generated by using decomposition of formamide or from the Dimroth rearrangement. More than one hundred molecules were obtained following this work. The products of this library were screened on seven families of kinases (CDK-5, GSK-3, CK-1, DYRK-1A, CK-1, EGF-R and VEGF-R) in order to determine a lead compound 87 (0. 031 nM on CK-1 and 0. 68 microM on CLK-1). A last study consisted in modulating this compound by Suzuki cross-coupling. Finally, more than two hundred molecules were synthetized and this project opens various pharmacological perspectives
Laborie-Crémont, Hélène. "Synthèse de nouveaux inhibiteurs de kinases d'origine marine à visée thérapeutique." La Rochelle, 2009. http://www.theses.fr/2009LAROS278.
Full textIn an effort to develop new marine inhibitors of kinases as anticancer and anti-Alzheimer’s disease agents, we synthesized original indigoids substituted in position 1, 5, 5’, 6, structurally closed to marine indirubins. Because of their poor water solubility and low bioavailability, monoxime analogs were also prepared. The effect on cyclin dependant kinases, glycogen synthase kinase 3, casein kinase 1 and on the survival of human neuroblastoma SH-SY5Y cells were estimated. On the other hand, we synthesized new 1,2,3-dithiazoles via Appel’s Salt chemistry, which are closed to marine hamacanthin. These compounds were screened for their antibacterial, antifungal and antitumor activity
Bunyapaiboonsri, Taridaporn. "Dynamic combinatorial chemistry : Exploration using biological receptors." Université Louis Pasteur (Strasbourg) (1971-2008), 2003. http://www.theses.fr/2003STR13065.
Full textDynamic combinatorial chemistry (DCC) has recently been introduced as a new and attractive approach for generating and screening large numbers of library compounds in one step. Based upon the reversible interconnection between library components, the self-adjusting process give access to selection and amplification of the best binder in the presence of a target. In this thesis, two biological targets were chosen to explore the DCC approach. The reversibility of the system was achieved using disulfide interchange or reversible acyl hydrazone formation. Firstly, a dynamic library of acetylcholinesterase inhibitors was generated through disulfide exchange. The reversibility of the system was observed by NMR spectroscopy. Upon scrambling 5 initial homodisulfides in the presence of a reducing agent, a 15-compound library was produced. The library components were analyzed by ESI-MS and CE. Secondly, a dynamic combinatorial library of acetylcholinesterase inhibitors was further generated through reversible acyl hydrazone formation. The pre-equilibrated process was applied to produce a dynamic library composed of 66 possible species, from a set of 13 initial aldehyde and hydrazide building blocks. Using a technique called dynamic deconvolution, a highly potent inhibitor was identified with IC50 in the nanomolar range. Finally, the pre-equilibrated process combined with the dynamic deconvolution technique was further studied to identify HPr kinase/phosphatase inhibitors. From a set of 21 initial aldehyde and hydrazide builiding blocks, a dynamic library of 440 possible compounds was formed in one operation. A bis-cationic heterocyclic ligand was identified as a relatively potent inhibitor, displaying an IC50 in the micromolar range
Tahtouh, Tania. "Optimisation et caractérisation de nouveaux inhibiteurs pharmacologiques de DYRKs et CLKs, les leucettines." Thesis, Rennes 1, 2013. http://www.theses.fr/2013REN1S015.
Full textDYRKs (dual specificity, tyrosine phosphorylation regulated kinases) and CLKs (cdc2-like kinases) are two families of kinases belonging to the CMGC group. They are involved in the development of Alzheimer's disease and Down syndrome. We here present the optimization and a detailed biological characterization of Leucettines, a family of pharmacological inhibitors of DYRKs/CLKs derived from Leucettamine B, an alkaloid produced by a marine sponge. We studied the structure/activity relationship of this class of inhibitors on a set of biological responses. To investigate potential targets of these inhibitors, we implemented an affinity chromatography method. The selectivity of Leucettine L41, selected as a representative Leucettine, was studied by in vitro activity and interaction assays of recombinant kinases and affinity chromatography approaches (Leucettines immobilized on agarose beads, competition on non-selective inhibitors). Transcriptomics and proteomics approaches were used to better understand the cellular mechanism of action of Leucettine L41. These approaches confirmed the selectivity of Leucettine L41 for DYRKs and CLKs but also revealed the existence of interesting secondary targets. Leucettine L41 modulates alternative splicing of pre-mRNAs. It displays neuroprotective properties towards glutamate-induced cell death. Leucettines deserve further development as potential therapeutic agents for the treatment of Alzheimer's disease and Down syndrome
Garron, Marie-Line. "Etudes structurales et fonctionnelles de FAT et de ses homologues." Montpellier 1, 2007. http://www.theses.fr/2007MON13520.
Full textFocal adhesions (FAs) are multi-protein complexes involved in cellular processes such as proliferation, adhesion, migration, as well as in oncogenic transformation. The FA targeting (FAT) domain is the C-terminal domain of the docking protein FA kinase (FAK). FAT allows FAK localisation at FAs by interacting with paxillin LD motifs. This localisation is essential for FA assembly and regulation. Structure based sequence alignment revealed homology with C-terminal domains of three FA protein families: Vinculin, Cas, p95/GIT1. Currently, only the structures of the FAT and Vinculin tail domains have been determined. By Small Angle X-ray Scattering (SAXS) and circular dichroïsm experiments we now confirm structural similarity of HEF-1 (a Cas family member) and GIT1 C-terminal domains with FAT. Both domains are, like FAT, required for protein localisation at FAs. We show that regulation of the interaction between GIT1 and paxillin LD motifs are different from FAT. HEF-1, in contrast does not bind LD motifs, but, surprisingly, associates intimately with the Guanidine Exchange Factor (GEF) domain of AND-34, a recently discovered protein implicated in the resistance of breast cancer cells to anti-estrogen tamoxifen treatment. We here present first structural insights into this atypical interaction between a GEF domain and a non-G-protein. In summary, even though 4-helix structure and FA localisation are conserved features of FAT-like domain, they have evolved individual molecular mechanisms for recruitment and regulation. Inhibitors for FAT-like domains might prove useful in blocking formation of metastases
Oumata, Nassima. "Inhibiteurs de kinases cyclines-dépendantes : synthèse et étude de leur mécanisme moléculaire d'action." Paris 5, 2008. http://www.theses.fr/2008PA05P619.
Full textCyclin-dependent kinases (CDKs) are involved in key molecular features of numerous diseases such as cancer, diabete, polycystic-kidneys desease, Alzheimer’s desease. . . In the first part of this thesis, new series of 2,6,9-trisubstitued purines, structurally related to the CDK inhibitor roscovitine, have been prepared. They mainly differ by the substituent on the C-6 position. These compounds were screened for kinase inhibitory activities and antiproliferative effects. Two series of compounds could be distinguished. Biarylamines derivatives (arylanilines) displayed potent inhibition of both CDKs and CK1. Several derivatives were inhibitors of CDK1/cyclin B (IC50: 200-300 nM), CDK5/p25 (IC50 < 100 nM) and CK1 (IC50: < 50 nM). The most active product was able to prevent the CK1-dependent production of amyloid-ß in a cell model. The second series of compounds are biarylmethylamines (arylbenzylamines). These derivatives displayed high antiproliferative activity on various cancer cells. In particular against HT-116 cell line and leukaemia cells. The mechanism of the apoptotic activity was elucidated: they activated caspases in a dose-dependent manner. In the second part of this thesis tools useful for the elucidation of the molecular targets of CDKs inhibitors have been prepared. A new chemical approach has been proposed for the preparation of purine conjugates suitable for affinity chromatography or labeled with a fluorescent dansyl group. In an affinity chromatography experiment, the over-expression of CDK5 could be observed in polycystic kidney cells
Boulahjar, Rajâa. "Synthèse et évaluation de nouveaux dérivés d'urées à base de tétrahydropyrido-isoindolones comme inhibiteurs de protéines kinases." Thesis, Orléans, 2011. http://www.theses.fr/2011ORLE2002.
Full textThe anti-tumor Chemotherapy uses molecules for specific therapeutic targets, particularly, protein kinases. To generate new kinases inhibitors, we tried to synthesize isoindolones containing the urea pattern. These compounds seem susceptible to fight cancer. This involved firstly, the preparation of various amines carried by an original kernel, type tétrahydropyridoisoindolone. To provide a functional diversity on the heterocycle previously named, different reactional sequences have been developed. Subsequently, the amines have been linked to a wide variety of heteroaryl via an urea function by developing, once again, new synthetic methodologies. Finally, our investigations have led us to include urea in a cyclical pattern. To this end, we inserted it in a pyridopyrimidinedione. A library of over 80 final molecules has been synthesized and evaluated in vitro on CDK1, CDK5 and GSK3, as well as on 6 different tumor cell lines. A structure-activity analysis showed that these compounds represent a new class of inhibitors of kinases with a significant biological activity. In vivo tests were done on three of our molecules and helped to highlight a significant antitumor effect
Naud, Josy Baldaheania. "Inhibition du transport des analogues nucléosidiques par l'inhibiteur de tyrosine kinase nilotinib." Master's thesis, Université Laval, 2013. http://hdl.handle.net/20.500.11794/24025.
Full textLe, Bescont Julie. "Inhibiteurs photo-contrôlables de la famille TAM - Méthodologie de sulfénylation directe d'imidazopyridines." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASF016.
Full textThe TAM family consists in 3 tyrosine kinases : Tyro3, Axl and Mer. These proteins are involved in many cellular processes and pathways. The TAM family has been identified as a new promising target for cancer therapy, autoimmune diseases and viral infections. However, only a few inhibitors have been developped for this family. The first chapter of this manuscript is dedicated to the conception, synthesis and biological evaluation of new inhibitors for the TAM family. To bypass the maindrawback of protein kinase inhibitors, selectivity, we chose to apply the concept of photopharmacology. This strategy enable spatial and temporal control of the drug activity upon irradiation. By blocking a key position of the inhibitor with a photoremovable group, we can inactivate the molecule, and restore the activity upon irradiation. We introduced different photoremovable protecting groups on our inhibitors. The choice of the groups, the synthesis, the photo-cleavage and the biological evaluation will be discussed in chapter 2.Finally, we also developped a methodology for direct sulfenylation of imidazopyridines using DABCO.(SO₂)₂ as sulfur source
Harari, Marine. "Mise au point de méthodes de synthèse pour la fonctionnalisation de composés hétérocycliques potentiels inhibiteurs de kinases." Rouen, 2016. http://www.theses.fr/2016ROUES021.
Full textThis thesis deals with the development of modulation strategies of the thiazoloquinazolinone structure. We are especially interested in elaborating transition metal-catalyzed methods in order to functionalize this heterocyclic system. Development of new synthetic routes for the synthesis of nitrogen containing analogues is also detailed. The first part of this manuscript concerns the use of transition metal in functionalization reactions in order to elaborate new tools for the modulation of thiazoloquinazolinones. Despite the failure with decyanative coupling reactions, the hydrodecyanation reactions took place in excellent yields. Direct C-H arylation reactions also were evaluated and efficient methods were elaborated with quinazolin-4(3H)-ones and thiazolo[5,4-f]quinazolin-9(8H)-ones substrates. The second part of this manuscript is focused on the synthesis of analogues containing an additional intracyclic nitrogen. Different pathways to access to these compounds are described. The third part deals with the biological evaluation of most of the compounds prepared along this work. Some protein kinases have been studied in order to evaluate the potential inhibition activity of our products
Vandromme, Lucie. "Synthèse de purines trisubstituées en tant qu'inhibiteurs potentiels d'enzymes : application à l'inhibition des protéines kinases dépendantes des cyclines (CDK)." Paris 11, 2005. http://www.theses.fr/2005PA112160.
Full textCDK are key regulatory of cell cycle enzymes and their deregulation is involved in cancer. Therefore, they are targets of choice for cancer therapy. In the laboratory, researches are focused on the synthesis of powerful and specific CDK inhibitors. Effective synthetic inhibitors have been discovered despite the great structural similarity between each CDK, and purines are one of several families which include the most specific inhibitors. The synthesis of 2,6,9-trisubstituted purines as potential CDK inhibitors is carried out by parallel synthesis. This strategy was applied in solution at first, and should be optimized on resin to lead then to supported syntheses of libraries. This thesis deals with synthesis of new original purine libraries obtained by palladium coupling reactions, and their biological evaluation. Thus, after rection conditions optimization, new purines have been obtained using Suzuki, Sonogashira, amidation or carbonylation reactions. Then their CDK inhibitory activity has been tested. As a first approach on solid support, the influence of the spacer arm length in some palladium coupling reactions has been studied
Saugues, Emmanuelle. "Synthèse de nouveaux inhibiteurs de kinases Pim et de modulateurs des protéines de la famille des Bcl-2, anticancéreux potentiels." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00743912.
Full textBendjeddou, Lyamin. "Synthèse et évaluation biologique de nouveaux inhibiteurs de kinases : identification d‘inhibiteurs de kinases parasitaires." Thesis, Paris 5, 2014. http://www.theses.fr/2014PA05P615.
Full textPhosphorylation by protein kinases is one of the most important post-translational modification in cellular processes such as division, differentiation, proliferation and apoptosis. Kinase deregulation is associated with numerous diseases such as cancer or neurodegenerative diseases. Imidazo[1,2-b]pyridazine and imidazo[4,5-b]pyridine were prepared to inhibit protein kinases involved in diseases targeted in the laboratory. The imidazo[1,2-b]pyridazines were synthesized to identify inhibitors of CLK1 and DYRK1A, potential targets in Alzheimer's disease. Among the imidazo[1,2-b]pyridazines synthesized, several molecules were found selective of DYRKs and CLKs, with IC50 < 100 nM. A structure-activity relationship based on the synthesis of 70 molecules, led to the identification of the structural bases of the selectivity. Products were also evaluated against parasite kinases. It was possible to identify some highly potent inhibitors on PfCLK1. The aim of second part of this thesis was to optimize the synthetic process to obtain imidazo[4,5-b]pyridines, which are close analogues of roscovitine. Derivatives had proved capable of inhibiting the formation of cysts in a cellular model of polycystic kidney disease. A seven-step synthesis has led to several grams of 3,5,7-trisubstituted imidazo[4,5-b]pyridine which is now available for evaluation in vivo
Dang-Trung, Khoi͏̈-Nguyên. "Intérêt potentiel en chimiothérapie anticancéreuse des inhibiteurs de protéines à activité tyrosine kinase : exemple de la génistéine." Paris 5, 1995. http://www.theses.fr/1995PA05P119.
Full textAmoussou, Nathalie. "Conception, synthèse, extraction phytochimique et étude biologique d'inhibiteurs potentiels de kinases à visées anticancéreuse." Thesis, Nantes, 2017. http://www.theses.fr/2017NANT1003.
Full textProteins kinases constitute a large group of enzymes that catalyze that play an essential role in the several cellular processes. Haspin, a serine/threonine kinase, is often classified as an atypical member of eukaryotic protein kinase family. The only substrate of Haspin identified to date is histone H3. Haspin plays an important role during mitosis and appears to be vital for maintaining chromosome cohesion. Due to it important role during mitosis, Haspin may have therapeutic utility in treating cancer. The aim of this work was to identify and valorize natural product as effective anti-cancer agents. This work is divided in two parts: - Firstly, we modulated a known structure to improve physico-chemical characteristics as well as biological activity. 8-amino-4-oxo-3,4-dihydro-5H-pyridazino[4,5- b]indole scaffold based on the grossularines A and B structure was designed. These new analogs were tested against many kinases and also evaluated against two human cancer cell lines. - In the second part, we studied five Beninese traditional medicine plants extracts: Amaranthus spinosus, Momordica charantia, Boerhaavia erecta, Boerhaavia diffusa and Combretum paniculatum. Phytochemical studies revealed that these plants have several active constituents. Acute toxicity studies were performed with plants extracts. After fractionation of the total extract of Combretum paniculatum, the various fractions were tested against many kinases
Gally, José-Manuel. "Développement d'outils de chémoinformatique pour l'identification d'inhibiteurs de protéines kinases à partir de fragments." Thesis, Orléans, 2017. http://www.theses.fr/2017ORLE2033.
Full textDrug design is a long and complex multidisciplinary process. From the discovery of the initial hit (bioactive molecule), to the lead (optimized compound), and finally to the commercialization of the end product (drug), almost 10 years are necessary and this process costs an average of $1 billion dollars. In order to optimize this process, new methods are relentlessly developed so that novel promising molecules might be identified faster for a given target. Protein kinases (PK) play a central role in most molecular pathways and are essential to control cellular mechanisms. The mutation of one PK can lead to severe pathologies such as neurodegenerative diseases or cancer, making the research of PK inhibitors (PKI) an intense area of therapeutic research. In this manuscript, two complementary chemoinformatics approaches are discussed for identifying PKI, and both depend on the preparation of small molecules (ligands). For this specific task, a new workflow protocol, VSPrep, was developed using only freely available tools for academics. First, a virtual screening approach of natural products was performed in order to identify bioactive molecules for cosmetics or therapeutic applications. Second, a novel in silico Fragment-Based Drug Discovery (FBDD) tool, Frags2Drugs, was developed specifically for kinase research. It combines molecular fragments derived from PKI into novel inhibitors bound to specific protein kinases. The tool was validated on several internal kinase projects leading to novel protein kinase inhibitors with acceptable drug-like properties
Valot, Gaëlle. "Extending the diversity of privileged natural product motifs : Synthesis of a library of resorcylic acid lactones and studies towards the guaianes and pseudoguaianes." Strasbourg, 2011. https://publication-theses.unistra.fr/public/theses_doctorat/2011/VALOT_Gaelle_2011.pdf.
Full textThe resorcylic acid lactones bearing a cis-enone functionality proved to be potent and irreversible inhibitors of protein kinases, a class of enzymes implicated in every transduction pathways whose dysfunction is at the origin of pathologies ranging from oncology to inflammation and neurodegenerative diseases. Attracted by their important biological activity, our laboratory developed a synthetic pathway to these pharmacophores, based on the fluorous tags technology. The first part of my thesis consisted in applying this synthesis to the elaboration of a library of 51 macrocycles. This library allowed to identify two modifications as increasing the biological activity : the introduction of an extra carbon in the macrocycle and of a hydroxyl group in β position of the diol. The second part of my thesis consisted in developing a general synthetic pathway to access various members of another class of potent irreversible inhibitors : the sesquiterpene lactones. These compounds exibit a wide spectrum of biological activity including cytotoxic, anti-tumor and anti-inflammatory properties. Unfortunately most of the targets and mode of action associated with these properties have not been identified yet. The synthetic pathway developed, based on a simple central bicyclic intermediate achievable in 13 steps (with the key step being a domino enyne metathesis) and inspired by the biogenesis, should allow the development of "tool compounds" to address these questions. This synthesis has been applied in particular to the preparation of the natural products geigerin and 6-deoxy-geigerin
Cortier, Marion. "Mécanismes de sensibilisation des cellules cancéreuses coliques humaines au glycéryltrinitrate associé à un inhibiteur de kinases." Dijon, 2009. http://www.theses.fr/2009DIJOS045.
Full textIn vitro, nitric oxide (NO), produced by the activation of inducible NO synthase or by NO donor, sensitizes cancer cells to death induced by cytokines or cytotoxic agents ineffective by themselves. These results are confirmed in humans since a NO donor, nitroglycerin (NTG), has shown beneficial effects in cancer treatment in several clinical trials. In our laboratory, we showed in vitro that high concentrations of GTN induced apoptosis in human colon cancer cells, whereas pharmacological concentrations did not. Low concentrations of GTN are toxic when combined with a kinase inhibitor, H89. This project proposed to characterize the signaling pathways that are the source of this sensitization. We have shown that this mechanism involves several actors of cell signaling: 1) It depends on the production of both NO and free reactive oxygen species (ROS). 2) It involves caspases and correlates with depolarization of the mitochondria. 3) It involves the purinergic receptors that are capable of recognizing H89 (never described). The prospects offered by this study would select some proteins of the cell signaling that could eventually form new therapeutic targets to develop in the treatment of colon cancer
Oyallon, Bruno. "Conception, synthèse et évaluation de quinoxalines et d'analogues comme inhibiteurs de la kinase HsPim-1." Thesis, Tours, 2019. http://www.theses.fr/2019TOUR3803.
Full textPim (proviral integration site for Moloney murine leukemia virus) kinases play a crucial role in cell survival, proliferation and cell differentiation as well as in apoptosis and chemoresistance. They act as oncogenic survival factors. Due to their structural features and their role in oncogenesis, Pim kinases are relevant targets for new anti-cancer therapies.Preliminary studies permitted to identify quinoxaline-2-carboxylic acid 1 as a new lead compound. This compound was able to inhibit Pim-1 in vitro activity (IC50 = 74 nM). In silico studies have shown that this compound could act as a non-mimetic ATP inhibitor. Our objective was to design and synthesize analogues of compound 1 with an optimised activity on Pim-1. These compounds were tested on a panel of mammalian kinases and on 3 leukemic cell lines
Miambo, Raimundo F. "Synthèse et évaluation biologique d'analogues "thia" de pyrrolo [3,4-b]carbazole-1,3-diones et de 3,4-(bis)indolylmaléimides." Reims, 2010. http://www.theses.fr/2010REIMP206.
Full textSeveral polycyclic indole-heterocycles possess interesting anti-cancer activities. In this field we had prepared some alkylamino side-chain substituted pyrrolo[3,4-b]carbazole-1,3-dione type derivatives displaying promising cytotoxic activities (IC50 = 0. 3-3 M) and affinity to DNA. On the basis of these results we were interested in the preparation of their ‘thia’ analogs where maleimide ring was replaced by 3-isothiazolone-1-oxide or 3-isothiazolone-1,1-dioxide moieties. The synthetic approach leading to such type of compounds was based on a Diels-Alder reaction as key-step implying an in-situ formed indolo-2,3-quinodimethane as diene. Cycloadditions between a conveniently substituted ‘gramine’ as thermal precursor of indoloquinodimethanes and 3-isothiazolone-1-oxide proved to be efficient: two regioisomer cycloadducts were obtained. The next steps of the synthesis consisted of a C-cycle aromatisation, followed by t-Bu group removal and introduction of aminoalkyl side-chains by simple functional group transformations. Biological evaluations of the prepared carbazole derivatives showed rather modest inhibitory activities (kinases, topoisomerases). The preparation of 3-isothiazolone-1,(1)-(di)oxide type dienophiles resulted in their mono- (4- or 5-) or 4,5-dihalogenated analogs as side-products. In the second part of this project we successfully used these ‘thia’ analogs of halogenated maleimides in Pd0-catalyzed Suzuki couplings affording the ‘thia’ analogs of 3,4-bisindolylmaleimides
Patry, Cédric. "Pharmacomodulation de structures polyhétérocycliques d'origine marine : synthèse d'analogues structuraux des grossularines comme inhibiteurs potentiels de kinases, à visée antitumorale." Nantes, 2008. https://archive.bu.univ-nantes.fr/pollux/show/show?id=9b150883-617c-4422-8ab5-79ec1b93969c.
Full textCancer is a major problem of public health. The research in chemotherapy advances, to develop new more specific compounds, diminishing side effects and resistances. So, the synthesis of new structures was inspired by molecules, as grossularines, exits of marine organism could allow to bring to light of new anticancerous agent. In a first part, this job syntheses and pharmacomodulations of analogues of reversed grossularines were accomplished. 3,5-dihydro-4H-imidazo[4,5-c]quinolin-4-one was synthetized by palladocatalysed annelation of N-aryl-2-imidazocarboxamides and the synthesis of 1,5-dihydro-4H-pyrazolo[4,3-c]quinolin-4-one envisaged from isatoic anhydrides by malonic synthesis. In a second part, a new structure has been developed with the support of molecular modelling. This comprehension « de novo » has allows the getting of a structure which will be synthetized by an efficient method in two stages. This structure 3,5-dihydro-4H-pyridazino[4,5-b]indol-4-one allows the introduction of numerous groups by acylation of Friedel-Craft during the synthesis. These molecules were assessed on kinases and on cancerous cell descendants. On kinases the most active compound has IC50 in the order of 5 μM. On cells, IC50 of the most active compounds is less than 1 μM
Feneyrolles, Clémence. "Identification et optimisation de nouvelles séries chimiques anti-kinases." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20238.
Full textKinases are an important family among human proteins that include 518 identified members so far. They play key roles in the living functions such as proliferation, survival, migration of cells and apoptosis that make them of tremendous interest as potential and highly studied therapeutical targets. In particular, many cancers are associated with kinase dysfunction, overactivation, overexpression or repression. They are also involved in auto-immune and inflammatory diseases. Kinase inhibitors development is a challenge of modern medicinal chemistry, as the high conservation of their activity domain makes it difficult to design of specific inhibitors as well as mandatory given the broad spectrum of regulated phenomenon through their pathways. We hereby propose to design a specific inhibitor of a therapeutically validated kinase in the field of oncology. That kinase is however and despite the need not specifically targeted by any compound in the market so far. We previously obtained a small and highly derivatizable hit that we decided to optimize step by step in order to obtain new chemical entities of high potential toward that specific kinase
Pierlot, Christel. "Conception et synthèse en série nucléotidique et nucléosidique de molécules à visée anti-HIV." Lille 1, 1991. http://www.theses.fr/1991LIL10080.
Full textLetribot, Boris. "Synthèse et évaluation biologique de nouveaux composés hétérocycliques potentiellement inhibiteurs de protéine-kinases." Thesis, La Rochelle, 2015. http://www.theses.fr/2015LAROS002/document.
Full textDeregulation of protein kinases leads to numerous pathologies such as cancers and neurodegenerative diseases. In order to identify new scaffolds able to inhibit this proteins we synthesized new 3-alkenyl-oxindoles. By the mean of Appel’s salt chemistry, we develop a new synthetic route to this skeleton. Our approach allows variation of the substituent of the exocyclic akene which can be functionalized by heterocycles, amino-nitriles or thio-nitrile which are obtained after selective ring opening of (1,2,3)-dithiazoles. In another part, given powerful indirubin kinase inhibitory potency, we synthesized new analogs indiribunoids and isoindigoids. In both cases (3-akenyl-oxindoles from Appel’s salt chemistry and indigoids), the aromatic ring were substituted by various electron withdrawing group and nitrogen were incorporated to determinate structure activity relationship. All this 80 original 3-alkenyl-oxindoles were evaluated for their ability to inhibit kinase activity and cell proliferation
Guihéneuf, Solène. "Synthèse et évaluation biologique d'analogues d'un alcaloïde marin, le dispacamide A, contre le cancer et la maladie d'Alzheimer." Rennes 1, 2012. http://www.theses.fr/2012REN1S070.
Full textSince several years, marine molecules have been widely studied. Some of these natural compounds from marine organisms have been evaluated as kinase inhibitors in cancer or in neurodegenerative diseases (Alzheimer). Our goal is to synthesize and to evaluate marine alkaloid analogs derived from the Dispacamide A, a member of C11N5 pyrrole-imidazole family extracted from a marine sponge (Agelas Dispar) in 1992. Few pharmacologic exploration and biological evaluation are described in literature. In our laboratory, many projects combinating green chemistry (microwaves, multicomponent reactions…) and synthesis of 2-amino-imidazol-4-ones, have led to the development of new kinase inhibitors (mostly Leucettamine B analogs). Based on this experience, we aim at synthesize and evaluate new Dispacamide A analogs, derived from imidazolin-4-ones and thiazolin-4-ones, as potential kinase inhibitors against cancer and Alzheimer disease (DYRK, CDK, GSK3, CLK, PI3K, CK1). Biological screening is realized in partnership with the Station Biologique de Roscoff, the Plateforme kinase d’Orléans and the Inserm de Rennes
VELAYOUDON, MICHEL. "Conception et synthese de nouveaux analogues des tyrphostines, inhibiteurs de tyrosine kinases : influence de differents groupements fluores sur l'activite biologique." Paris 6, 1995. http://www.theses.fr/1995PA066229.
Full textDomarkas, Juozas. "Conception, synthèse et évaluation pharmacologique d'inhibiteurs pseudopeptidiques de la farnésyltransférase, potentiellement utilisables dans le traitement du cancer." Lille 2, 2001. http://www.theses.fr/2001LIL2MT09.
Full textBosc, Nicolas. "Développement de nouvelles approches protéo-chimiométriques appliquées à l'étude des interactions et de la sélectivité des inhibiteurs de kinases." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2051/document.
Full textThe human kinome contains 518 proteins. They share a common mechanism of protein phosphorylation known to play an important role in cellular signaling pathways. Impaired kinase function is recognized to be involved in severe diseases like cancer. Due to high structural similarity between protein kinases, development of potent and selective kinase inhibitors is a challenging task. The selectivity of kinase inhibitors may lead to side effects potentially harmful. In this thesis, we first developed new selectivity metrics to determine inhibitor selectivity directly from biological inhibition data. Compared to existing metrics, the new selectivity scores can be applied on diverse inhibition data types. Second, we developed a proteometric approach in order to understand why some protein kinases are never inhibited by Type II inhibitors. The statistical model built for this purpose allowed us to identify several discriminant residues of which few of them correspond to experimentally described residues of interest. Third, using a new 3D protein kinase descriptor, we developed and validated novel proteo-chemometrics approaches to study and discover new kinase inhibitors
Baladi, Tom. "Autour du noyau imidazo[4,5-b]pyridine : inhibiteurs potentiels de la protéine kinase Tyro3 et fonctionnalisation directe de liaisons C – H." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS386/document.
Full textBladder cancer is a major medical issue, being the fourth most frequent cancer in men and treatable only with heavy surgery and/or broad-spectrum chemotherapy. This thesis project deals with the discovery of new targeted therapies of bladder cancer by blocking specifically, at a molecular scale in cancer cells, the signaling pathways in which protein kinase Tyro3 is involved. Indeed, its overexpression in most bladder cancers and the major part it plays in cancer cells survival have led to the validation of protein kinase Tyro3 as a therapeutic target for the treatment of bladder cancer. This thesis project can be divided into three main parts: the development of new synthetic methods around the imidazo[4,5-b]pyridine scaffold, the synthesis of a library of compounds using these methods and eventually the study of structure-activity relationships of these compounds versus Tyro3
Matheux, Alice. "Implication de PXR, Pregnane X Receptor, dans la résistance aux inhibiteurs de kinases en cancérologie : application au cancer de la prostate et mélanome." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTT049.
Full textClinical resistance to anti-cancer drugs remains one of the major causes of treatment failure. This resistance is pleiotropic and involves various mechanisms, including drug transport and metabolism that implicate key enzymes the expression of which is regulated by nuclear receptors, in particular the Pregnane X Receptor (PXR or NR1I2). The expression of PXR and of its target genes have been associated with chemoresistance in various cancer cell models, including prostate cancer cells. There are currently very few options for the treatment of castration-resistant prostate cancer (CRPC), and despite numerous clinical trials, no kinase inhibitor has been approved in that indication. Our project was intended to study the impact of PXR activity on the efficacy of kinase inhibitors in CRPC. Using a tissue microarray of 512 patients, we first confirmed that the expression of PXR was more frequently detected in late stages of prostate cancers. We also demonstrated that stable expression of human PXR could sensitize 22RV1 prostate cancer cells to afatinib, erlotinib or dabrafenib, whereas it conferred a resistance to dasatinib and had no significant effect on other kinase inhibitors tested. Hypersensitivity to afatinib was associated with an increase in the intracellular concentration of the drug and a significant increase in the expression of the monocarboxylate transporter SLC16A1. Interestingly, pharmacological inhibition of SLC16A1 by the BAY-8002 derivative inhibited PXR-mediated sensitization of 22RV1 cells to afatinib, demonstrating for the first time the critical role of this transporter in the cell response to this kinase inhibitor. In parallel, we also studied whether kinase inhibitors could exert an agonist activity towards PXR and be responsible for potential drug-drug interactions. This relied on published observations demonstrating that dabrafenib is a PXR agonist, able to induce the expression of PXR target genes with the same potency as the reference agonist SR12813. We then studied the effect of PXR expression on the cell response to combinations of kinases inhibitors targeting BRAF and MEK that are approved in the treatment of melanomas. Our preliminary results demonstrate that, in BRAF V600E mutated A375 melanoma cells, stable expression of PXR could induce a sensitization to dabrafenib+trametinib and vemurafenib+cobimetinib combinations and to each inhibitor used alone, suggesting that other mechanisms currently under investigation, but not PXR agonist activity, are involved in this process. Nevertheless, our results further strengthen the fact that PXR could be used as a new predictive biomarker of the efficacy of kinases inhibitors in the clinic