Search results for "Réponse"
showing 10 items of 28 documents
Immunity and other defenses in pea aphids, Acyrthosiphon pisum
2010
Background Recent genomic analyses of arthropod defense mechanisms suggest conservation of key elements underlying responses to pathogens, parasites and stresses. At the center of pathogen-induced immune responses are signaling pathways triggered by the recognition of fungal, bacterial and viral signatures. These pathways result in the production of response molecules, such as antimicrobial peptides and lysozymes, which degrade or destroy invaders. Using the recently sequenced genome of the pea aphid (Acyrthosiphon pisum), we conducted the first extensive annotation of the immune and stress gene repertoire of a hemipterous insect, which is phylogenetically distantly related to previously ch…
Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes
2015
O. oeni is responsible for wine malolactic fermentation. As any organism, O. oeni tries to adapt its physiology to environmental fluctuations by producing Hsp proteins encoded by the hsp genes. In O. oeni, CtsR is currently the only regulator of hsp genes. As an alternative to the lack of genetic tool, with the goal of understanding the mechanisms of O. oeni stress response, we developed a new expression vector, the pSIPSYN, to produce antisense RNA targeting of hsp18 mRNA. The synthesis of hsp18 asRNA leads to the decrease in the protein level of Lo18 and induced a loss of cultivability after heat or acid shock showing for the first time in vivo involvement of Lo18 in thermotolerance and a…
Effets de la nutrition et du génotype de la plante sur la résistance de Medicago truncatula à Aphanomyces euteiches
2016
SPEIPMUBAGROSUPINRA; Dans la nature, les plantes ont la capacité de mettre en oeuvre des réponses immunitaires pour faire face aux microorganismes pathogènes. Cependant, ces réponses de défense sont coûteuses en énergie et conduisent la plante à détourner une partie de ces ressources destinées à d’autres traits de vie comme la croissance. Ce compromis défense/croissance est largement conditionné par la disponibilité extérieure en nutriments. Afin de mieux décrire et comprendre les liens entre la nutrition et la défense, nous avons analysé l’impact de la nutrition azotée et l’effet de la variabilité génétique végétale sur la capacité de la légumineuse Medicago truncatula à résister à un agen…
Evaluation of proton MR spectroscopy at 3 Tesla without endorectal coil in patients with a localized prostate cancer treated with exclusive radiother…
2011
Prostate cancer is the most frequent tumour affecting the male population. When the prostate is not removed and is treated with radiation therapy, PSA slowly decreases over time to reach its nadir, even sometimes 18 to 24 months after the completion of radiation therapy without combined androgen suppression therapy. When combined with hormones, PSA falls abruptely with no possibility to perceive the impact of either hormones or radiation effects on PSA.The optimal value of PSA that should be reached after radiation therapy (nadir) and time to this nadir are still unclear.Even when a satisfactory value of the PSA nadir is reached, on-going variations of the PSA and its “bounce” effects, whic…
Type-2 histones deacetylases and cryptogein-induced cell death in tabacco
2011
Cryptogein, which is secreted by the oomycete Phytophthora cryptogea, is a proteinaceous elicitor of plant defense reactions that activates a set of signaling events leading to the hypersensitive response and to systemic acquired resistance. Although the early cytosolic signaling events induced by cryptogein are well described, the only nuclear events characterized to date are the variations in free calcium concentrations and defense-related gene expression. The characterization of the activation of cytosolic protein kinases, including WIPK and SIPK, by phosphorylation in response to cryptogein highlights the key-role played by posttranslational modifications in cryptogein-induced signaling…
Déclaration et vérification des créances. Qualité pour répondre à une lettre du liquidateur
2009
International audience; (Com. 16 sept. 2008, pourvoi n° 07-17.272, arrêt n° 852 F-D, Gauthier ès-qual. c/ BNP Paribas lease group ; Com. 16 sept. 2008, pourvoi n° 07-17.273, arrêt n° 853 F-P+B, Gauthier ès-qual. c/ BNP Paribas lease group, cette Revue 2008. 873, obs. J.-L. Vallens ; D. 2008. AJ. 2345, obs. A. Lienhard ; Gaz. proc. coll. 2008, n° 4, p. 53, note E. Le Corre-Broly ; Com. 16 sept. 2008, pourvoi n° 07-17.274, arrêt n° 854 F-D, Gauthier ès-qual. c/ BNP Paribas lease group)
Déclaration et vérification des créances. Contestation d'une créance. Droits du créancier en cas de défaut de réponse à la lettre de contestation ou …
2018
International audience; (Com. 28 juin 2017, n° 16-12.382, arrêt n° 988 FS-P+B+I, Sté Brenac et associés, ès qual., c/ Caisse régionale de Crédit Agricole mutuel du Languedoc, D. 2017. 1357, obs. A. Lienhard ; Rev. sociétés 2017. 525, obs. L. C. Henry ; JCP E 2017. 1460, n° 10, obs. Ph. Pétel ; Com. 28 juin 2017, n° 16-16.614, arrêt n° 990 FS-P+B+I, Établissement public Grand port maritime de Marseille c/ Sté Kem One et a., D. 2017. 1357 ; Rev. sociétés 2017. 526, obs. L. C. Henry ; JCP E 2017. 1460, n° 11, obs. A. Tehrani)
Déclaration et vérification des créances. Non-lieu à renvoi d'une question prioritaire de constitutionnalité
2019
International audience; (Com. 4 sept. 2018, n° 17-28.749, arrêt n° 820 F-D, M. Manuel Oliver P. c/ Sté Easy connect et a.)
Molecular mechanisms involved in the regulation of stress response in Oenococcus oeni and experimental evolution
2020
Oenococcus oeni is the main bacterium responsible of malolactic fermentation in wine. This lactic acid bacteria grow in the stressful wine environment (high ethanol content, sulfites, low pH and low temperatures….). To maintain its cellular homeostasis, O. oeni has established mechanisms of resistance to its ecological niche. This research work focuses on the adaptative response of O. oeni to its environment and especially to acidity. Two approaches have been implemented (1) First, a targeted approach to characterize the molecular actors involved in regulating the general stress response. The RNA interference technique made possible the characterization of the repressor CtsR as well as two …
Dépendance de la fatigue à la longueur musculaire : approche mécanique et neurophysiologique
2006
The objective of this work is to evaluate the fatigue dependency on the knee extensor muscles length. Exercises varying the type of contraction (isometric and eccentric) and intensity of contraction (maximal and sub-maximal) are performed in order to disrupt the neuromuscular system by different factors of fatigue: central and peripheral. These exercises are performed at two muscular lengths (S and L, corresponding respectively to 40 and 100° of knee flexion). Neuromuscular parameters (maximal torque, muscular twitch, voluntary activation level, electromyographic activity, etc.) are analyzed in pre- and post-fatigue conditions in the type of contraction required by the fatiguing exercise. I…