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Добірка наукової літератури з теми "Ingénierie tissu osseux"
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Статті в журналах з теми "Ingénierie tissu osseux"
Amédée-Vilamitjana, J. "Intérêt de la coopération ostéoendothéliale en ingénierie du tissu osseux." ITBM-RBM 26, no. 3 (June 2005): 223–28. http://dx.doi.org/10.1016/j.rbmret.2005.04.003.
Повний текст джерелаMyon, L., J. Ferri, F. Chai, N. Blanchemain, and G. Raoul. "Ingénierie du tissu osseux oro-maxillofacial par combinaison de biomatériaux, cellules souches, thérapie génique." Revue de Stomatologie et de Chirurgie Maxillo-faciale 112, no. 4 (September 2011): 201–11. http://dx.doi.org/10.1016/j.stomax.2011.06.002.
Повний текст джерелаДисертації з теми "Ingénierie tissu osseux"
Grellier, Adeline Maritie. "La communication ostéo-endothéliale : application en ingénierie du tissu osseux." Bordeaux 2, 2008. http://www.theses.fr/2008BOR21560.
Повний текст джерелаBone development and remodelling are dependant on a tight cell cooperation between osteoblastic and osteoclastic cell types, responsible for bone formation and degradation, respectively. Angiogenesis is also a key process involved in these mechanisms and cell communication between osseous and endothelial cells is fundamental This work aims to study the cell communication between human osteoprogenitors (HOPs) arising from bone marrow and human endothelial cells (human umbilical cord endothelial cells : HUVECs). This osteo-endothelial communication was analysed using a well defined in vitro co-culture model in 2D but also into a 3D system into alginate microsphères which were then implanted in vivo in a bone defect in nude mice. In a first part, the HOPs were submitted to a mechanical stress which is an important parameter for the physiology of bone. Their ability to regulate their phenotype was demonstrated under shear stress. In co-culture wuth HUVECs, the phenotype was regulated and VEGF (vascular endothelial growth factor seems to be involved in this regulation. The endothelial phenotype was also regulated in co-culture since HUVECs migration led to a tubular-like cell rearrangement. Into alginate microspheres cultured in vitro, the HUVECs stimulated the osteoblastic phenotype of HOPs. Moreover, after implantation in a bone defect in vivo, the HUVECs enhanced the HOP-induced mineralization. This work shows that the cells are able to communicate and seems promising for the development of new tissue engineering strategies
Fénelon, Mathilde. "La MAH en ingénierie tissulaire : application à la régénération du tissu osseux." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0241.
Повний текст джерелаGuided bone regeneration (GBR) is commonly used to repair damaged bone. GBR is based on the application of a membrane which will act as a physical barrier to isolate the intended bone-healing space. The development of bioactive membranes has been suggested to overcome some limitations of the currently used membrane. Due to its biological properties, the human amniotic membrane (HAM) is a new biological membrane option for GBR. This study aimed at investigating the most suitable conditions to use HAM for GBR. First, the influence of both HAM sides and the impact of cryopreservation were studied. Then, a new decellularization process of HAM, that is simple and reproducible, has been developed. In a third part, bone regeneration of non-critical and critical sized defects depending on the preservation method of HAM was assessed in rodents. Results showed that neither stem cells found in HAM, nor the HAM layer used to cover the defect had an influence on its potential for bone regeneration. The most promising results were achieved with the decellularized/lyophilized HAM for the field of bone regeneration
Maisani, Mathieu. "Conception et développement d’hydrogels pour l’ingénierie tissulaire appliquée au tissu osseux." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0667/document.
Повний текст джерелаNew strategies to overcome the clinical limitations of current techniques for bone defect filling and regeneration has led to the involvement of bone tissue engineering. Indeed, strategies based on tissue engineering techniques seem to be an alternative to the use of grafts and thus to defeat their limits. The approach employed in this thesis consists in development and use of hydrogels as scaffold materials for bone defect filling and regeneration. There are many approaches that also use hydrogels, each one with its advantages and limitations. In this context, our work consisted in the use of a non-polymeric hydrogel as basic material in the development of strategies for bone tissue engineering. Briefly, several cell types are present within bone tissue and will participate in the processes of bone formation and regeneration. The objective of our strategies was the contribution of exogenous stem cells and then their differentiation into osteogenic cells or the recruitment and differentiation of the host cells into osteogenic cells within the material. The GNF gel was used as a three-dimensional matrix considering its properties of injectability, gelation in the absence of toxic crosslinking agent and its osteoinductive potential. The goal was to develop strategies for bone tissue engineering by combining the GNF gel with a natural matrix of cellular collagen or bioactive molecules to promote the regeneration of bone lesions. This work allowed to develop and characterize strategies relevant to the regeneration of bone lesions based on the use of hydrogels
Babilotte, Joanna. "BioFabrication par assemblage couche par couche pour l’ingénierie du Tissu Osseux." Thesis, Bordeaux, 2021. http://www.theses.fr/2021BORD0048.
Повний текст джерелаIn several clinical cases, dental implant placement can be hindered if the alveolar bone volume is limited. Current surgical methods for alveolar bone regeneration are not fully satisfying, and more reliable methods to regenerate bone is needed. Several biomaterials for bone substitution are available. However, they do not possess all the necessary properties for complete bone regeneration, as they lack osteoinductive and osteogenic potential.Tissue engineering can provide solutions for current issues in bone reconstruction. Tissue engineering strategies combine engineered scaffold with cells and suitable biochemical soluble factors. To produce the scaffold several techniques are available. These last years rapid prototyping technologies gained a huge interest, as they offer reproducibility and important resolution. The current issues remaining to produce living tissue constructs by bone tissue engineering techniques are related to cell seeding inside the macroporous scaffold. The conventional approach involves seeding cells onto a macroporous scaffold and expects cell colonization to form composite tissue constructs. Many limitations have been observed using this approach, due to slow vascularization, limited diffusion of nutrients, low cell density and non-uniform cell distribution.This project aims to address the limitations of scaffold-based bone tissue engineering, by organizing osteoprogenitor cells inside the scaffold. Based on previous results, we choose to use a layer-by-layer approach. This layer-by-layer fabrication method, also called “sandwich” in this work, should favor cell-material interaction and facilitate the maturation of these constructs. Finally, the amount and quality of tissue regenerated should be enhanced.The first part of the project consisted in the fabrication of scaffolds membranes. We have developed a new material, made of medical-grade poly(lactic-co-glycolic) acid (PLGA) mixed with hydroxyapatite nanoparticles (nHA), in the shape of a filament for 3D printing by Fused Deposition Modelling (FDM). PLGA was chosen for its biodegradation rate and its mechanical properties close to human cortical bone. Nanoparticles of HA were included to improve the bioactivity of the material for bone tissue engineering applications. Then, these materials were characterized for mechanical and physico-chemical properties before in vitro and in vivo studies. In these parts, we used the stromal vascular fraction of adipose tissue, to be closer to a potential clinical translation. The survival, proliferation and differentiation of the cells were evaluated. Finally, bone regeneration was observed after implantation of the constructs in a rat bone calvaria defect model
Catros, Sylvain. "Etude de la Micro-Impression d'Eléments Biologiques par Laser pour l'Ingénierie du Tissu Osseux." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14108/document.
Повний текст джерелаBone Tissue Engineering is a multidisciplinary field which aims to produce artificial tissues for regenerative medicine. The purpose of this work was to produce three-dimensional bone substitute using a laser-assisted bioprinting (LAB) workstation developped in the laboratory INSERM U577 (TEAL Project: Tissue Engineering Assisted by Laser). The first step of the work consisted in the synthesis of specific materials for LAB and in the characterization of their biological and physico-chemical properties. We have prepared a nano-hydroxyapatite bioink, human cells bioinks and hydrogels bioinks. Then, three-dimensional materials have been prepared using LAB and have been implanted in vivo in mice. The results have shown that Laser Assisted Bioprinting is an efficient method fo patterning 3-D materials using biolgical elements
Hamdan, Ahmad. "Effets de dérivés sanguins sur le comportement de cellules ostéogéniques en culture : applications en ingénierie tissulaire osseuse." Paris 7, 2009. http://www.theses.fr/2009PA07G001.
Повний текст джерелаTissue engineering is a new domain developed in the aim of restoring, replacing or maintaining biological functions and tissue integrity. H implies the seeding of stem cells on 3D scaffolds in the presence of proper signaling molecules to promote cellular activity. The use of autologous products is preferred, when possible, in order to avoid ail risk associated with the use of allogenous or xenogenous products. Blood derivatives represent a potential autologous source for growth factors as well as other moiecules that couid be used in tissue engineering. Our objective was to evaluate, in an in vitro model, the effects of 2 blood derivatives on the behavior of rat calvaria osteoblastic cells. In the first part, we evaluated the effects of a homologous serum on osteoblastic ce11 proliferation and differentiation. In the second part of this work, we studied the in vitro effects of a new 3D scaffold of blood origin, globin, on osteoblastic cells. Our results show that these 2 blood derivatives are capable of stimulating osteoblastic cell activity and could find, in the future, clinical applications in the field of human bone tissue engineering
Barou, Carole. "Conception d'un ciment à base de phosphates de calcium pour la reconstruction osseuse et la libération de médicaments." Electronic Thesis or Diss., Montpellier, Ecole nationale supérieure de chimie, 2022. http://www.theses.fr/2022ENCM0019.
Повний текст джерелаThe treatment of bone is a challenge due to the difficulty that has the bone to repair itself. Several surgical situations sometimes require the application of auto- and allografts. Autologous bone grafting is the gold-standard treatment for bone reconstruction as it is the only that can provide osteoinductive growth factors, osteogenic cells and osteoconductive scaffold. These procedures present many limitations including donor site morbidity, increased operative time and providing insufficient quantity or quality. There is therefore a need to develop novel therapeutic strategies able to exploit the natural regenerative potential of bone and that can be delivered in a less invasive manner. Among the materials studied for the development of novel scaffolds, calcium phosphate cements provide many advantages due to its biological performances, including their biocompatibility, osteoconductivity, osteoinductivity, biodegradability, bioactivity, and interactions with cells. The aim of this thesis is the development and characterization of novel calcium phosphate based cements for bone regeneration. Our goal is to develop new original processes for the development of injectable scaffolds. The major advantage of such structures lies in the perfect biocompatibility with the mechanical properties similar to those of bone
Realista, Coelho Dos Santos Pedrosa Catarina. "Nanotopographies bioactives pour le contrôle de la différenciation des cellules souches mésenchymateuses pour des applications en ingénierie de tissu osseux." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0319/document.
Повний текст джерелаNanotopography with length scales of the order of extracellular matrix elements offers the possibility of regulating cell behavior. Investigation of the impact of nanotopography on cell response has been limited by inability to precisely control geometries, especially at high spatial resolutions, and across practically large areas. This work allowed the fabrication of well-controlled and periodic nanopillar arrays of silicon to investigate their impact on osteogenic differentiation of human mesenchymal stem cells (hMSCs). Silicon nanopillar arrays with critical dimensions in the range of 40-200 nm, exhibiting standard deviations below 15% across full wafers were realized using self-assembly of block copolymer colloids. To investigate if modifications of surface chemistry could further improve the modulation of hMSC differentiation, mimetic peptides were grafted on the fabricated nanoarrays. A peptide known for its ability to ameliorate cell adhesion (RGD peptide), a synthetic peptide able to enhance osteogenesis (BMP-2 mimetic peptide), and a combination or both molecules were covalently grafted on the nanostructures.Immunofluorescence and quantitative polymerase chain reaction (RT-qPCR) measurements reveal clear dependence of osteogenic differentiation of hMSCs on the diameter and periodicity of the arrays. Moreover, the differentiation of hMSCs was found to be dependent on the age of the donor. Surface functionalization allowed additional enhancement of the expression of osteogenic markers, in particular when RGD peptide and BMP-2 mimetic peptide were co-immobilized. These findings can contribute for the development of personalized treatments of bone diseases, namely novel implant nanostructuring depending on patient age
Ziane, Sophia. "Développement et caractérisation d'un hydrogel thérapeutique pour la régénération du tissu osseux." Thesis, Bordeaux 2, 2012. http://www.theses.fr/2012BOR21930/document.
Повний текст джерелаBone tissue is characterized by its mineralized matrix which is subject to formation and resorption activities ensuring its renewal and remodeling throughout the life. In case of damage, the bone can repair itself naturally to restore its integrity and its physical properties. Nevertheless, some pathologies or surgical procedures can lead to massive loss of bone and the natural process of self-repair is insufficient. First line, the bone graft is considered (autograft and allograft), however, due to reduced availability and risks of rejection and transmission of infectious agents, this technique is not feasible in all clinical situations. The surgeon can then make use of osteoconductive biomaterials but these are only usable in the case of filling of small defects because they are simply passive scaffold for bone formation. These limits may be exceeded through the concept of tissue enginee- ring, designing innovative biomaterials with high osteogenic power conferred by particular growth factors or osteoprogenitor cells. In our work we seek to develop a new product of tissue engineering to repair bone defects. The proposed strategy is based on the combination of a three-dimensional scaffold and adult stem cells derived from human adipose tissue (ASC). The originality of this system comes from the three-dimensional matrix, which is a thermosensitive hydrogel composed of synthetic monomeric Glycosyl-Nucleoside-Fluorinated (GNF) low molecular weight. In the field of bone regeneration, hydrogels are generally used as cellularized matrix molecules associated with osteogenic (BMP2, Beta-Glycerophosphate) or ions (Calcium : Ca2+, Phosphate : PO42-) to allow osteoblast differentiation of cells encapsulated in the gel. However, in our work, we have not used these osteogenic factors. Our study revealed that the hydrogel of GNF has the essential criteria to be used in clinical practice : non-toxicity, biocompatibility, biodegradability, injectability and biointegration. Injections of gel/ASC complex performed in animal ectopic site have showed that the gel is formed in situ within 20 minutes and encapsulated cells survived and proliferated for several months. In situ, ASC were differentiated into mature osteoblasts expressing alkaline phosphatase and osteocalcin and synthesizing an extracellular matrix rich in calcium phosphate. So, this work has allowed the development of an innovative product for tissue engineering, combining a three-dimensional scaffold, the GNF based hydrogel, a cellular component, the ASC. This cellularized matrix appears promising as injection system for clinical applications of bone regeneration
Boukhechba, Florian. "Développement de modèles pour l'étude de la formation osseuse en culture tridimensionnelle et en ingénierie tissulaire osseuse." Nice, 2009. http://www.theses.fr/2009NICE4086.
Повний текст джерелаThree-dimensional culture (3D) of bone cells and bone tissue engineering are both based on the use of scaffolds to convey osteogenic cells and obtain in vitro and in vivo bone formation respectively. 3D culture is an important field in cell biology, dedicated to reduce the gap between two-dimensional culture and complex tissue architecture. Many works have described various scaffolds as support for the 3D culture of bone cells but in two studies only the presence of osteocyte-like cells have been detected after very long periods of culture. I have engineered an original model of 3D culture in which human primary osteoblasts are seeded within the interspace of calibrated biphasic calcium phosphate particles (BCP). This system results, after one week, in the development of an osteoid matrix and the spontaneous differentiation of the osteoblasts in osteocytes. This model of primary osteocyte differentiation in 3D is a new tool to gain insights into the biology of osteocytes, which compose over 90-95% of bone cells but are difficult to study due to their accessibility and the very rare models available in vitro. The aim of bone tissue engineering is to regenerate the bone stock through a combination of scaffolds, osteogenic factors and / or osteogenic cells. The majority of the studied in this field advocates the use of mesenchymal stromal cells (MSC) but the mechanism of action of these cells is still poorly documented. Based on the use of BCP particles, I have participated to the development of a new bone substitute, which has been patented in our laboratory. I have used this new biomaterial as a vehicle for mouse MSC in a model of ectopic bone formation. Using a method of quantitative tracking of the implanted cells, I have shown that the implanted MSC disappeared very quickly from the implants whereas host cells were progressively recruited suggesting that host cells are responsible for the bone formation. We have concluded that, in this model, MSC play a chemotactic function towards host cells. A preliminary study of the putative molecules involved in this phenomenon was performed with the aim of proposing a new