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Academic literature on the topic 'Chemobiology'
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Journal articles on the topic "Chemobiology"
Gottlieb, Otto R., Maria Renata de M. B. Borin, and Nei Regis S. de Brito. "Quantitative chemobiology." Pure and Applied Chemistry 73, no. 3 (January 1, 2001): 583–88. http://dx.doi.org/10.1351/pac200173030583.
Full textHurst, Jane L., and Robert J. Beynon. "Scent wars: the chemobiology of competitive signalling in mice." BioEssays 26, no. 12 (2004): 1288–98. http://dx.doi.org/10.1002/bies.20147.
Full textGottlieb, Otto R., and Maria Renata de M. B. Borin. "Quantitative chemobiology: a guide into the understanding of plant bioactivity." Journal of the Brazilian Chemical Society 13, no. 6 (November 2002): 772–76. http://dx.doi.org/10.1590/s0103-50532002000600007.
Full textPélingre, Matthieu, Dindet Steve-Evanes Koffi Teki, Jamal El-Abid, Vincent Chagnault, José Kovensky, and Véronique Bonnet. "Ring-Opening of Cyclodextrins: An Efficient Route to Pure Maltohexa-, Hepta-, and Octaoses." Organics 2, no. 3 (August 25, 2021): 287–305. http://dx.doi.org/10.3390/org2030015.
Full textSonpavde, Guru, Gregory Russell Pond, Stephanie A. Mullane, Ana Arlene Ramirez, Nicholas J. Vogelzang, Andrea Necchi, Thomas Powles, and Joaquim Bellmunt. "Outcomes of advanced urothelial carcinoma following discontinuation of programmed death (PD)-1 or PD-ligand (L)-1 inhibitors." Journal of Clinical Oncology 34, no. 2_suppl (January 10, 2016): 385. http://dx.doi.org/10.1200/jco.2016.34.2_suppl.385.
Full textReady, Neal, Frederick Aronson, Harold Wanebo, and Theresa Kennedy. "A Low Rate of Central Nervous System Progression in a Phase II Trial of Outpatient Chemobiologic Therapy With Cisplatin, Temozolomide, Interleukin-2, and Interferon Alfa 2-B for Metastatic Malignant Melanoma." American Journal of Clinical Oncology 28, no. 5 (October 2005): 479–84. http://dx.doi.org/10.1097/01.coc.0000164006.72694.1b.
Full textDissertations / Theses on the topic "Chemobiology"
Delehouzé, Claire. "Approche chémobiologique d’étude de la régulation moléculaire de la mort cellulaire programmée par nécrose pour l’optimisation de nouveaux candidats médicaments." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS605.
Full textThe concept of programmed cell death first appeared in the literature in the mid-1960s. In 1972, the term "apoptosis" was used to describe a major mechanism of programmed cell death, as opposed to accidental death by necrosis. Since the mid-2000s, other non-apoptotic pathways of regulated cell death have been identified; these manifest the phenotypic features of necrotic death. These pathways are classified according to the molecular regulators involved in each. Two of these pathways, known as necroptosis and ferroptosis, are being extensively studied because of their imputed roles in severe acute and chronic pathologies for which there are currently no effective treatments. Understanding the molecular mechanisms driving necroptosis and ferroptosis is crucial for the development of new targeted therapies. Indeed, identifying the molecular players involved in these cell death pathways will lead to the identification of novel pharmacological targets and subsequent screening for therapeutic drugs. Moreover, as the coactivation of these regulated necrotic pathways occurs in a number of common pathologies, the development of multi-target inhibitors (that is, a polypharmacological strategy) is a path-breaking avenue of research. Indeed, targeting two or more regulated necrosis pathways with a single molecule would be expected to be markedly more effective than targeting a single pathway. SeaBeLife Biotech, the industrial partner of this CIFRE thesis, is developing necroptosis and ferroptosis inhibitors, as well as first-in-class dual inhibitors (i.e. those that inhibit both necrotic cell death pathways simultaneously).The aims of this thesis work were (i) to study the cellular effects of necroptosis and ferroptosis inhibitors developed in a collaboration among the Roscoff Biological Station, the universities of Lyon and Rennes, and SeaBeLife Biotech; (ii) to identify the cellular targets of these molecules in order to refine our understanding of their mechanism of action; and (iii) to propose new drug candidates to be developed by SeaBeLife Biotech. Work was conducted on the study of two of SeaBeLife's pioneering molecules, belonging to distinct chemical families, and featuring dual inhibition of necroptosis and ferroptosis. Further studies focused on one molecule, the 7-azaindole derivative SBL01, which is SeaBeLife Biotech's most advanced product. SBL01 will shortly enter the regulatory pre-clinical phase of testing. SBL01 targets were investigated by reverse screening using small molecules functionally derivatized grafted onto solid matrices. These matrices were used as affinity chromatography ligands, in order to purify and identify a new SBL01 target of interest. A large-scale transcriptomic study was also used, to identify phenotypic marker genes and complete the characterization of the mechanism of action of SBL01. This work has thus led to the proposal of innovative screening assays that could lead to the emergence of new drug candidates. Therapeutic applications range from renal failure and acute liver failure (particularly in the case of drug overdose) to chronic neurodegenerative pathologies
Morel, Oriane. "Characterization of the spatial distribution of lignins in plant cell walls using chemical reporters and Raman." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILS118.
Full textLignin is a polyphenolic polymer of the cell wall involved in many aspects of growth and development in higher plants. As a major component of lignocellulosic biomass, it is also of economic interest. Although the biosynthesis of the lignin polymer is relatively well understood, we need to know more about how changes (quantity/structure) to other cell wall polymers (e.g., cellulose, hemicelluloses, pectins) affect lignin production. To provide more information on this question we implemented a two-phase approach based on the use of biological imaging. The first phase involved the development/improvement of different high-resolution complementary imaging techniques. We firstly developed a novel quantitative ratiometric approach (REPRISAL) based on the parametric/artificial intelligence segmentation of confocal microscopy images obtained by lignin chemical reporter bio-orthogonal chemistry. This methodology allowed us to precisely map the lignification capacity of different cell wall layers (cell corner, compound middle lamella and secondary cell wall) in Arabidopsis WT plants and the prx64 mutant. In a second development, we modified the REPRISAL segmentation algorithim thereby enabling it to be used to map relative cell wall lignin levels determined by the ratiometric safranin-O fluorescence technique. Finally, we used Raman imaging to compare the ability of three different multivariate analytical methods (unmixing, cluster analysis and orthogonal matching) to provide detailed spatial information about the distribution of different polymers in plant cell walls. In the second phase we used the developed/improved imaging techniques to analyse whether changes to cell wall hemicelluloses affect lignification in the Arabidopsis irx9 mutant. Our results demonstrated that changes in the distribution of cell wall hemicelluloses do indeed modify the lignification process, particularly in the younger parts of the plant floral stem. Targeted transcriptomics of selected cell wall genes suggested that the observed changes could be related to the induction of a defence response. Overall, the techniques developed within the framework of this thesis should prove valuable for future studies of cell wall dynamics. The results obtained on the irx9 mutant provide a novel insight into the dynamic relationships that exist between different polymers of the plant cell wall
Gatin-Fraudet, Blaise. "Synthèse et évaluation de nouvelles sondes pour l’imagerie cellulaire du peroxyde d’hydrogène." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASF023.
Full textReactive oxygen species (ROS: hydrogen peroxide, hydroxyl and superoxide radicals) are by-products of aerobic metabolism. Among them, hydrogen peroxide (H2O2) plays a crucial role in a wide range of physiological processes in human. However, when our cells are subjected to oxidative stress conditions, its overproduction is directly or indirectly responsible for numerous damages at the molecular level, which can affect cellular mechanisms. The development of selective and sensitive tools allowing H2O2 detection in a biological context represents a great challenge for a better understanding of H2O2-mediated signalling in physiological and pathological processesTo date, several “off-on” small fluorescent probes triggered by H2O2 have been developed for its detection. Among them, probes based on the boronate oxidation are amongst the most effective for the detection of H2O2 in cellula. But these probes also suffer from lack of reactivity, which is not fully satisfactory for biological applications.The aim of this thesis project was to improve the reactivity of the trigger toward H2O2. To address this issue, the use of borinic acids as new trigger was envisioned. A new fluorogenic probe based on coumarin scaffold was synthetized and studied by 1H RMN, and by in vitro and in cellula fluorescence spectroscopy. In the second part of the project, the regioselectivity of the reaction was improved and new fluorogenic probes with or not an immolative spacer were studied
Touti, Fayçal. "Synthèse et caractérisation d'agents magnétogéniques à base de Fe(II) pour l'IRM moléculaire." Thesis, Lyon, École normale supérieure, 2013. http://www.theses.fr/2013ENSL0830.
Full textThis PhD project aims to develop the first line of Iron(II) based magnetogenic probes that respond to bio-chemical analytes. It sets out to address one of the main limitations of responsive probes by rendering the initial probe completely MRI silent. During the previous investigations of the Bio-organic chemistry group, a duo of Iron(II) low spin-high spin parent complexes has been identified as the basis for a magnetogenic design. In the current work we have validated this OFF-ON approach, in vivo, by ensuring the electroneutrality of the final contrast agent. Such a feature required the development of protected synthons for the convergent introduction of tetrazolylmethyl chelating motifs. And such a synthetic methodology was also applied for the synthesis of the first full nitrogen analog of EDTA. In a second part of this work, a first magnetogenic concept was explored exploiting amidine moieties to silence or awaken the electronic spin of ferrous complexes. We demonstrated that this magnetogenic concept was valid, after a short chemical stimulation, though at the expense of harsh acidic conditions to trigger the paramagnetism of the final complex. Finally we successfully explored a second magnetogenic concept operating in physiological conditions and responding to bio-chemical stimulations.We then evaluated the most promising candidate in cellulo by developing a biological model expressing the nitroreductase enzyme
Salaam, Jeremy. "Sondes magnetogènes à base de Fe(II) répondantes à un analyte chimique par changement de spin électronique." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEN075.
Full textThis thesis deals with Fe(II) based molecules capable of a spin switch by interacting with an analyte in solution, which are used in the field of molecular imaging, in particular MRI (Magnetic Resonance Imaging). For several years now, the scientific community around MRI has become aware of two important issues: MRI’s low sensitivity and the toxicity of the contrast agents used to improve it. Our team responds to these two drawbacks by developing magnetogenic probes that are specific to a biological analyte and supposedly less toxic.For that purpose, the development of a reliable methodology allowing the incorporation of sulfonate units on the periphery of coordination complexes, offering a solubility and compatibility increase in biological media, was carried out. Then it was applied to a probe system already established in the team in order to increase its pH of activation. By expanding these peripheral decorative units to other functional groups, a series of derivatives have been synthesized, in order to extract a trend in the activation performance of the system in acidic conditions.With the aim of finding a system operating at physiological pH, two complexes were synthesized, carrying new activation motifs. The extensive characterization and activation studies of these complexes provided valuable data for the team in its understanding and optimization of the probe’s design.The in cellulo biocompatibility of the developed systems has been explored by studying their toxicity and their cellular absorption.An enzymatic activation project in the stomach of laboratory animals (rat), and the team's first in vivo proof of concept attempt, has been initiated. The preliminary manipulations are promising for the rest of the project. Finally, the difference in the MRI signal of the synthesized chemical objects, the difference between the probe before its encounter of the analyte and after, is unprecedented in the field. These results are encouraging for the development of a probe sensitive enough to allow application to routine molecular imaging experiments
Descamps, Florian. "Conception, synthèse et évaluation de composés anti-Alzheimer et de sondes chimiques pour l’élucidation de leur mode d’action." Thesis, Lille, 2019. http://www.theses.fr/2019LILUS056.
Full textAlzheimer’s disease (AD), the most frequent form of dementia, is characterized by aggregation and intraneuronal accumulation of abnormally modified microtubule-associated Tau proteins (Tau pathology) along with extra-neuronal amyloid deposits (Amyloid pathology). There is currently no cure for AD and available treatments offer only modest and short-term symptomatic benefits. Current drugs are no longer reimbursed by Social Security.A family of molecules (named MSBD) developed in our lab was shown to act on both amyloid and Tau pathologies in vitro and in vivo. The lead of this series, AZP2006 is currently ending phase 1 clinical trials. However, its biological target remains unknown. In this first part of this work, a program based on a "ligand based" approach associated with de novo design was finalized to discover potential anti-Alzheimer agents. Several pharmacomodulations revealed structure-activity relationship and allowed to discover a series of indirect β-secretase inhibitors that promote non-amyloidogenic processing of the Amyloid Precursor Protein. In second time, the design and synthesis of photoaffinity labelling probes (PAL) was applied toward the elucidation of the mode of action of the AZP2006. Thirdly, a molecular modelling study was undertaken for the initiation of a new medicinal chemistry project based on a "ligand based" approach. Virtual screening of a library was performed to allowed the discovery of potential activators of the SIRT1 protein as anti-Alzheimer agents