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Academic literature on the topic 'Noctuidés – Développement – Aspect endocrinien'
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Dissertations / Theses on the topic "Noctuidés – Développement – Aspect endocrinien"
Frisco, Caroline. "L'arrêt du développement chez les lépidoptères : la 20-hydroxyecdysone est-elle toujours impliquée ?" Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/23892/23892.pdf.
Full textRousseau, Jean-Philippe. "Impact des minéralocorticoïdes, glucocorticoïdes et de l'hormone thyroïdienne sur le développement respiratoire de Lithobates catesbeianus." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26370.
Full textThe emergence of air breathing during amphibian development requires significant changes to the brainstem circuits that generate and regulate breathing. Because this metamorphosis is regulated by metamorphic hormones, we tested the hypothesis that exposing the brainstem to these hormones augments the fictive air breathing frequency in Lithobates catesbeianus tadpoles. Brainstems were isolated from pre-metamorphic tadpoles and a hormone exposure was made with the following hormones: aldosterone, corticosterone, T3. By comparison with preparations subjected to sham treatment, hormone exposure generally increased fictive air breathing frequency. Brainstem preparations showed a response to a change in the aCSF pH only before the 24h incubation, suggesting a chemosensitivity lost following the incubation. However, the patterns of the exposed brainstem presented an activity that is reminiscent of those observed in adult frogs. We conclude that hormones play an important role in the maturation of the neural circuits that generate and regulate breathing in this species.
Peron, Marie-Christine. "Epidermal growth factor (EGF)et développement foeto-placentaire." Paris 5, 1993. http://www.theses.fr/1993PA05P097.
Full textRichard, Elodie Marie. "Rôle de la CBG dans la variabilité de l'axe corticotrope et le développement de l'obésité." Bordeaux 2, 2006. http://www.theses.fr/2006BOR21347.
Full textThis thesis work was aimed to study the role of CBG in the variability of the hypothalamo-pituitary-adrenal axis (HPA) and the development of obesity after a QTL analysis. To go further in this study, we wanted to create rodent transgenic models of CBG over-expression (classical transgenesis, injection of virus particles) and ablation of expression. We have not be able to create a model of over-expression. However, in the total CBG knock-out mice that we have obtained, our data show that lack of CBG leads to an adaptation in secretion of glucocorticoids. The in-depth analysis of this model as well as the construction of a tissue-specific knock-out offer new prospects for HPA analysis and the role of CBG. Also, an association study between a polymorphism of CBG and obesity in humans has given us some new elements about CBG association with obesity. Finally, during these experiments, two isoforms of CBG were discovered and analysed in vitro
Vallée, Monique. "Influences des évènements péri-nataux sur le vieillissement de l'activité de l'axe corticotrope et des capacités cognitives et conatives chez le rat." Bordeaux 2, 1997. http://www.theses.fr/1997BOR28477.
Full textJustet, Aurélien. "Implication de FGF9 et de FGF19 dans la fibrose pulmonaire idiopathique." Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7079.
Full textIdiopathic Pulmonary Fibrosis (IPF) is a chronic, progressive, irreversible and fatal pulmonary pathology for which the therapeutic options remain limited today. There is an abnormal reactivation of the pathways involved in lung development including the family of Fibroblast growth factors (FGF). This induces abnormal communications between the mesothelial cells, the alveolar epithelial cells and the pulmonary fibroblasts, which are key players in pulmonary fibrogenesis.Thus, a re-expression of FGF9 has been observed in the pleura of patients with IPF but its action remains unknown. Other members of this family have never been studied. FGF19 is an endocrine FGF, it has shown anti-fibrotic properties in the liver but its action in the lungs remains to be evaluated.Our work shows for the first time that there is a deregulation of the expression of FGF9 and FGF19 during IPF. In vivo, FGF9 prevents pleural remodeling induced by a control adenovirus. In vitro, FGF9 prevents myofibroblastic differentiation of mesothelial cells via the receptor FGFR3. Overexpression of FGF19 prevents the development of bleomycin-induced murine pulmonary fibrosis or overexpression of TGF. In vitro, we have demonstrated that FGF19 prevents myofibroblastic differentiation by inhibiting the JNK pathway and prevents apoptosis of alveolar epithelial cells by decreasing the expression of the pro apoptotic protein Bim.Altogether, these data suggest that FGF9 and FGF19 are involved in the pathophysiology of IPF and could constitute innovative therapeutic targets