Добірка наукової літератури з теми "Choix de destin cellulaire"
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Статті в журналах з теми "Choix de destin cellulaire":
Poullaouec, Tristan. "Choix du destin et destin du choix." Revue française de pédagogie, no. 175 (June 1, 2011): 81–84. http://dx.doi.org/10.4000/rfp.3065.
Simont, Juliette. "Le choix originel : destin et liberté." Les Temps Modernes 674-675, no. 3 (2013): 68. http://dx.doi.org/10.3917/ltm.674.0068.
Mahbubani, Kishore. "Le destin de l'Asie, le choix de l'Amérique." Esprit Août/septembre, no. 8 (2006): 109. http://dx.doi.org/10.3917/espri.0608.0109.
Tournon, André. "Le choix d’un destin mythique dans le Songe de Poliphile." Réforme, Humanisme, Renaissance 72, no. 1 (2011): 7–25. http://dx.doi.org/10.3406/rhren.2011.3129.
Sfez, Christine. "Les accidents de la route : hasard ou choix de destin." Le Journal des psychologues 241, no. 8 (2006): 49. http://dx.doi.org/10.3917/jdp.241.0049.
Scigala, Valérie. "Renaud Camus : réécrire le destin." Mnemosyne, no. 4 (October 11, 2018): 14. http://dx.doi.org/10.14428/mnemosyne.v0i4.12273.
Dhavernas, Marie-Josèphe. "La procréatique et les normes sociales." Dossier 4, no. 1 (April 12, 2005): 149–59. http://dx.doi.org/10.7202/057635ar.
Ruggiu, François-Joseph. "Le destin de la noblesse du Canada, de l’Empire français à l’Empire britannique1." Revue d’histoire de l’Amérique française 66, no. 1 (January 7, 2014): 37–63. http://dx.doi.org/10.7202/1021081ar.
Hazif-Thomas, C., R. O. Peix, and P. Thomas. "Le choix d’une approche, le destin d’un mot, le sens d’une question : gérontopsychiatrie ou psychogériatrie ?" NPG Neurologie - Psychiatrie - Gériatrie 10, no. 58 (August 2010): 184–88. http://dx.doi.org/10.1016/j.npg.2010.03.003.
Litke, Rachel, Éric Boulanger, and Chantal Fradin. "Caenorhabditis elegans, un modèle d’étude du vieillissement." médecine/sciences 34, no. 6-7 (June 2018): 571–79. http://dx.doi.org/10.1051/medsci/20183406017.
Дисертації з теми "Choix de destin cellulaire":
Bonnet, Frédéric. "Choix du destin cellulaire et cinétique du cycle cellulaire : rôle de CDC25B durant la neurogenèse embryonnaire." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30107/document.
Generating cell diversity is essential in developmental biology and to preserve tissue homeostasis in adulthood. This results from the choice of stem cells and progenitor cells to commit into a particular fate in response to extrinsic cues and to intrinsic properties. The aim of my PhD was to elucidate the role of the cell cycle in the neurogenesis process (i.e. in neuron generation) using the embryonic chick neural tube as a paradigm. On the one hand, I have developed a new real time imaging strategy to measure the length of the four cell cycle phases in neural progenitors. On the other hand, I performed gain and loss of function experiments of a regulator that control mitosis input, the CDC25B phosphatase, in neural progenitors and showed that this cell cycle regulator promotes neurogenic divisions at the expense of proliferative divisions, thus controlling neuronal production
Mayeuf, Alicia. "Choix du destin cellulaire des progéniteurs multipotents du somite, chez l'embryon de souris." Paris 6, 2013. http://www.theses.fr/2013PA066495.
The dorsal part of the somite, the dermomyotome contains multipotent Pax3+ progenitors, which give rise to different cell types such as skeletal muscle, dermal, endothelial, mural and brown adipose cells. The aim of this thesis was to understand mechanisms underlying cell fate decisions in this context in the mouse embryo. We have first shown that the Notch signaling pathway directs multipotent progenitors towards a vascular instead of a myogenic fate, by acting on the Pax3 :Foxc2 genetic equilibrium. To determine if Foxc1, the homologue of Foxc2, is also implicated in this mecanism, we have conditionally deleted both genes in Pax3+ progenitors. We document new phenotypes, including a reduction in vascular, cells, notably endothelial cells in the forelimb, where, surprisingly myogenic cells are also absent, leading to a number of possible hypotheses. Foxc2 is also implicated in the differentiation of brown adipose tissue, which we show is a derivative of Pax3+ cells in the dermomyotome. We have studied the development of this tissue in the embryo and propose a model in two steps, with initial formation of an “undifferentiated adipogenic mass” which subsequently differentiates into brown adipocytes. Gain and loss of function approaches suggest that Foxc1/2 play a role in the control of mitochodrial function during the differentiation of brown adipocytes in the embryo. This role may also be played by Foxc1 in the slow fibers of skeletal muscle where it is specifically expressed in the adult
Gothie, Jean-David. "Influence de la signalisation thyroïdienne et du métabolisme mitochondrial sur le choix de destin des cellules souches neurales de la zone sous-ventriculaire chez la souris adulte." Thesis, Paris, Muséum national d'histoire naturelle, 2017. http://www.theses.fr/2017MNHN0023.
The adult mammalian brain maintains its capacity to generate new cells from neural stem cells (NSCs), mainly localized in two specific brain regions, the hippocampus and the sub-ventricular zone (SVZ). This process, named neurogenesis, results in the production of new neurons and new glial cells (astrocytes and oligodendrocytes). Several signals control NSCs proliferation and differentiation. Among those, thyroid hormones (THs) are involved in NSCs proliferation in the SVZ and in neuronal differentiation. NSC metabolism relies mainly on glycolysis associated with a low mitochondrial activity, whereas mature cells, like neurons and glia, preferentially use oxidative phosphorylation. Changes in NSC metabolism can impact cell fate. As THs play an important part in activating mitochondrial metabolism, I hypothesized that the influence of TH signaling on mitochondrial activity triggers NSC fate choice in the adult SVZ. First, I showed in vivo and in vitro that THs allow NSC determination in neuronal precursors, whereas a short hypothyroidism favors glial determination. Transthyretine, a TH binding protein, is specifically present in the SVZ cells having a neuronal fate, while type 3 deiodinase, a TH inhibitor, is expressed by oligodendrocyte precursor cells (OPCs). These results indicate that THs signaling isdifferentially activated in neuronal and glial cell lineages. I observed that cells adopting a neuronal fate display a greater mitochondrial activity when compared to OPCs, and that TH signaling favors mitochondrial respiration and ROS production in the SVZ cells. Inhibiting the mitochondrial respiratory chain prevents TH-mediated promotion of neuronal determination, proving the need of mitochondrial activation for NSC commitment toward a neuronal phenotype. Besides, it is also known that modifications of mitochondrial morphology (or mitochondrial dynamics) are required for the respiration to increase. Among mitochondrial dynamics, fission is crucial for a good intracellular repartition of energy production, and for cell migration. In the SVZ cells, I showed that, DRP1, the main inducer of mitochondrial fission, is activated by THs mainly in cells adopting a neuronal fate. Thus, THs favor NSC fate choice toward a neuronal phenotype through the activation of mitochondrial metabolism and mitochondrial fission in the adult mouse SVZ
Flici, Hakima. "Différenciation et plasticité des cellules souches neurales." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-01070644.
Mancini, Laure. "Spatiotemporal control of Neural Stem Cell decisions in the adult zebrafish telencephalon." Thesis, Sorbonne université, 2020. http://www.theses.fr/2020SORUS154.
In some regions of the adult vertebrate brain, Neural Stem Cells (NSCs) generate fully functional neurons. NSCs are found mostly in quiescence, but can shuttle from quiescence to activation (division). At the population level, the proportion of NSCs dividing at a given time remains constant throughout adulthood and perturbations of NSC activation rate correlate with pathological situations. Also, the spatiotemporal distribution of NSC activation events is expected to impact the homogeneous maintenance of the NSC pools and the locations of neuronal production. What controls the rate and spatiotemporal distribution of NSC activation events remain poorly understood. The adult zebrafish telencephalon is a good model to address these questions. The telencephalon hosts many NSCs and it allow the recording of their behaviors over weeks thanks to an intravital imaging procedure. In this thesis, we have used this model to study the regulation of adult NSCs behaviors from two perspectives. First, we assessed the existence of non-cell-autonomous mechanisms controlling the quiescence-activation balance of the NSC population in space and time. Second, we investigated the relevance of intrinsic heterogeneities on individual NSC behaviors. This work highlighted (i) the importance of NSC geometry for their fate decisions during activation and (ii) the role of their differentiated progeny to locally exert a delayed inhibition, via Notch signaling, to prevent neighboring NSC activation. Using modeling we also show how the lineage-related inhibition maintains NSCs with specific spatiotemporal correlations and can spatially homogenize the distribution of adult-born neurons
Mazurier, Nicolas. "Etude des mécanismes de maintenance et de spécification des cellules souches et progénitrices de la rétine du xénope." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00980574.
Lemey, Camille. "Manipulation du destin cellulaire pour améliorer la régénération tissulaire au cours du vieillissement." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT052.
Aging is a complex process which is often punctuated by the appearing of age-related diseases such as arthritis, idiopathic pulmonary fibrosis or osteoporosis, and which is associated with a decrease of regeneration abilities and of adult stem cells number. In 2007, Dr. Yamanaka and his collaborators showed for the first time that human fibroblasts could be converted into pluripotent stem cells by inducing the expression of 4 transcription factors: OCT4, SOX2, KLF4 and c-MYC. In the laboratory, it was showed in 2011 that it is possible to reprogram senescent cells which are accumulating in aging organisms and to differentiate them into rejuvenated somatic cells.In vivo, a total reprogramming would lead to teratomas formation but if the reprogramming process is induced and stopped before getting pluripotent stem cells, we think that it is possible to restore altered cell physiology and to delay tissues aging and its deleterious consequences. Dr. Izpisua Belmonte validated this hypothesis in December 2016. He designed a murine transgenic model which recapitulates the premature aging phenotype of Hutchinson Gilford syndrome and which can be induced to express OCT4, SOX2, KLF4 and c-MYC, and he proved that it is possible to increase mice lifespan and to delay the appearing of pathological aging phenotype. We built a similar murine model and showed that a transient reprogramming can not only increase lifespan, but also delay age-related weight loss and pathological aging phenotype. Moreover, we were able to maintain a higher regenerative capacity until mice death. We also modeled age-related pathologies such as arthritis or idiopathic pulmonary fibrosis in mice which were inducible for the Yamanaka’s transcription factors and we showed that transient reprogramming could prevent damages. This study will have allowed to confirm the importance that cellular reprogramming can have in the fight against aging
Bolz, Marianne. "Régulation du destin cellulaire pendant la neurogénèse postnatale : rôle de l'innervation dopaminergique issue du mésencéphale." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4098.
In the postnatal and adult mammalian brain neurogenesis persists in the subgranular zone of the hippocampal dentate gyrus and the subventricular zone (SVZ). In the SVZ slowly dividing stem cells give rise to neuroblasts that migrate to the olfactory bulb (OB) where they reach the granule and glomerular cell layer of the OB and differentiate into different interneuron subtypes including a small fraction of dopaminergic interneurons. The discovery of postnatal and adult neurogenesis has changed the view of the plasticity of the brain remarkably and raised the hope for new therapeutical approaches in the field of neurodegenerative diseases. Since in Parkinson’s disease the main motor symptoms are caused by the dopaminergic denervation of the striatum adjacent to SVZ, the understanding of the generation and differentiation of OB dopaminergic neurons has received special attention. Interestingly, the neurotransmitter dopamine itself has been suggested to influence olfactory bulb neurogenesis via direct innervation of SVZ by midbrain dopaminergic neurons. However, data on this topic have been contradictory. In this study, I investigated how dopaminergic innervation influences SVZ neurogenesis and the fate of SVZ progenitors. I combined a 6-OHDA model of dopaminergic denervation in postnatal mice with in vivo forebrain electroporation to specifically label lateral and dorsal SVZ progenitors and to follow their fate in the olfactory bulb
Baudouin, Nicole. "Pour une approche clinique de l'orientation scolaire et professionnelle." Paris 13, 2003. http://www.theses.fr/2003PA131022.
The vocational choice is nowadays added to the youth personal choices. It is often posed in terms of destiny specific of every one. Only afterwards can the motives be assessed such as it appears in the Oedipus's myth and the Sophocle's tragedy. In the same way, we can understand afterward Freud's and Schnitzler's choices who became doctors in spite of themselves. We are chosen more often than we choose, but without being aware of it : the stenght of unconscious. However we do not drop our first desires. Nostalgic, we are compelled to follow roundabout ways that lead us back, according to the pattern of the principe of reality. The stake would be : not dropping one's desire. But though working backwards, the psychism makes progresses like the developing ego. It's up to the psychologist to follow the roundabout ways with the subject, so that they take on a signifiance for him and become part of his personal history
Andriatsilavo, Rakoto Mahéva. "La régulation des cellules souches adultes intestinales de drosophila melanogaster : Comment SPEN influence un destin cellulaire." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066381/document.
Adult stem cells are non-differentiated cells that maintain tissue homeostasis by supplying differentiated cells while at the same time self-renewing. How is this balance between stem cell state and differentiated state controlled? This question became one of the major interests of the Stem cell research and Translation, mostly due to the potential therapeutic perspectives that it gives. Regarding this effort, this thesis work describes a new function of a gene call split-ends/spen in adult stem cell regulation in Drosophila intestine. SPEN familly is composed by essential genes, which codes conserved proteins from Plants to Metazoa. They are involved in key cellular processes such as cell death, differentiation or proliferation, and are associated with various molecular functions controlling transcriptional and post-transcriptional gene expression. We found that a spen inactivation in Drosophila intestine leads to an abnormal increase in adult stem cells. In this work, by combining genetics tools and in vivo stem cell analysis methods, we could show that Spen works as a key factor of intestinal stem cell commitment and plays a role in their proliferation control. How does genetics programs control cellular identity? In order to investigate the molecular signature of intestinal stem cells and progenitor cells knockdowned for spen, we combined genetics, cell sorting and mRNA sequencing analysis to uncovered Spen target genes regulated in intestinal stem cells. Here, we provide a new function of spen in adult stem cell regulation, which may also shed light on its mode of action in other developmental and pathological contexts
Книги з теми "Choix de destin cellulaire":
Garcia, Laura Gallego. La légende du roi errant. Genève (Suisse): Joie de lire, 2005.
Guer, Alice. LES TROIS SOURCES T1 - Le choix d'un destin. AIRVEY, 2017.
Тези доповідей конференцій з теми "Choix de destin cellulaire":
Catros, S. "A quoi servent les Bio-Imprimantes 3D ?" In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206601012.