Search results for "regulation"
showing 10 items of 4463 documents
Terminal tendon cell differentiation requires the glide/gcm complex.
2004
International audience; Locomotion relies on stable attachment of muscle fibres to their target sites, a process that allows for muscle contraction to generate movement. Here, we show that glide/gcm and glide2/gcm2, the fly glial cell determinants, are expressed in a subpopulation of embryonic tendon cells and required for their terminal differentiation. By using loss-of-function approaches, we show that in the absence of both genes, muscle attachment to tendon cells is altered, even though the molecular cascade induced by stripe, the tendon cell determinant, is normal. Moreover, we show that glide/gcm activates a new tendon cell gene independently of stripe. Finally, we show that segment p…
Identification and diagnosis of patients with familial chylomicronaemia syndrome (FCS): Expert panel recommendations and proposal of an "FCS score".
2018
Familial chylomicronaemia syndrome (FCS) is a rare, inherited disorder characterised by impaired clearance of triglyceride (TG)-rich lipoproteins from plasma, leading to severe hypertriglyceridaemia (HTG) and a markedly increased risk of acute pancreatitis. It is due to the lack of lipoprotein lipase (LPL) function, resulting from recessive loss of function mutations in the genes coding LPL or its modulators. A large overlap in the phenotype between FCS and multifactorial chylomicronaemia syndrome (MCS) contributes to the inconsistency in how patients are diagnosed and managed worldwide, whereas the incidence of acute hypertriglyceridaemic pancreatitis is more frequent in FCS. A panel of Eu…
Dual mode of action of grape cane extracts against Botrytis cinerea
2019
International audience; Crude extracts of Vitis vinifera canes represent a natural source of stilbene compounds with well characterized antifungals properties. In our trials, exogenous application of a stilbene extract (SE) obtained from grape canes on grapevine leaves reduces the necrotic lesions caused by Botrytis cinerea. The SE showed to possess a direct antifungal activity by inhibiting the mycelium growth. The activation of some grapevine defense mechanism was also investigated. H2O2 production and activation of mitogen-activated protein kinase (MAPK) phosphorylation cascades as well as accumulation of stilbenoid phytoalexins were explored on grapevine cell suspension. Moreover, the t…
Heat shock factor 2 is a stress-responsive mediator of neuronal migration defects in models of fetal alcohol syndrome
2014
Fetal alcohol spectrum disorder (FASD) is a frequent cause of mental retardation. However, the molecular mechanisms underlying brain development defects induced by maternal alcohol consumption during pregnancy are unclear. We used normal and Hsf2-deficient mice and cell systems to uncover a pivotal role for heat shock factor 2 (HSF2) in radial neuronal migration defects in the cortex, a hallmark of fetal alcohol exposure. Upon fetal alcohol exposure, HSF2 is essential for the triggering of HSF1 activation, which is accompanied by distinctive post-translational modifications, and HSF2 steers the formation of atypical alcohol-specific HSF1–HSF2 heterocomplexes. This perturbs the in vivo bindi…
Cyclopropane Fatty Acid Synthase from Oenococcus oeni: Expression in Lactococcus lactis subsp. Cremoris and Biochemical Characterization
2015
Bacterial cyclopropane fatty acid synthases (CFA synthases) catalyze the transfer of a methyl group from S-adenosyl-L-methionine (AdoMet) to the double bond of a lipid chain, thereby forming a cyclopropane ring. CFAs contribute to resistance to acidity, dryness, and osmotic imbalance in many bacteria. This work describes the first biochemical characterization of a lactic acid bacterium CFA synthase. We have overexpressed Oenococcus oeni CFA synthase in E. coli in order to purify the enzyme. The optimum cyclopropanation activity was obtained at pH 5.6 and 35.8 °C. The high K(m) (AdoMet) value obtained (2.26 mM) demonstrates the low affinity of O. oeni enzyme toward the L. lactis subsp. cremo…
Excluding identities through ethical regulation: A Levinasian analysis of managerial practices to combat ill-treatment
2019
Thème du congrès : « Enlightening the Future:The Challenge for Organizations, Sub-theme 15: ‘Faking It’: Identity Work in an Age of Exclusion; International audience
Housekeepers lost in the Land of Labor Market Segmentation
2007
07022 - 13 p.; This communication analyses the role that the main social actors, employers, trade unions and the French government play in labour market regulations, especially in working conditions, for feminine low wage workers. Labor market segmentation and the dual market theory (Doeringer and Piore, 1971), with on one hand qualified workers employed in attractive and stable positions, and on the other hand manpower in low-paid and insecure jobs, often in back-breaking working conditions, are not new. However, they have recently reappeared in the situation of housekeepers in the French hotel industry, where there are particularly few chances of career ladders, and on the contrary, there…
Pharmaciens et coordination des soins primaires en France : quels enjeux ?
2019
Multi-professional coordination is a strong axis of the reorganization of primary care in France. While this coordination concerns a priori all health professionals, some of them actually are still marginally involved. This article examines the challenges of integrating pharmacists into primary care in France. On the one hand, it is based on an analysis of experiments carried out in other health systems, and on their evaluations. On the other hand, it develops an initial reflection on the levers and obstacles that could explain in France, the poor integration of pharmacists but also on the challenges of a stronger presence of these professionals in the coordination of primary care.
Competence Acquisition through Autonomy in the Self-regulated Learning Process
2012
La autorregulación académica se ha establecido como una de las competencias básicas en el sistema educativo bajo el nuevo paradigma del Espacio Europeo de Enseñanza Superior. La autorregulación del aprendizaje no es una capacidad mental, como la inteligencia, o una habilidad, como la lectura, sino un proceso autodirigido a través del cual los aprendices transforman sus capacidades mentales en habilidades académicas. En la investigación que aquí se presenta, se consideran específicamente las dimensiones motivacionales (orientación intrínseca y extrínseca, valor otorgado a las tareas, locus de control para el aprendizaje, autoeficacia para el aprendizaje y ansiedad ante las evaluaciones) diri…
DNA damage response at telomeres boosts the transcription of SARS-CoV-2 receptor ACE2 during aging
2021
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes the coronavirus disease 2019 (COVID-19), known to be more common in the elderly, who also show more severe symptoms and are at higher risk of hospitalization and death. Here, we show that the expression of the angiotensin converting enzyme 2 (ACE2), the SARS-CoV-2 cell receptor, increases during aging in mouse and human lungs. ACE2 expression increases upon telomere shortening or dysfunction in both cultured mammalian cells and in vivo in mice. This increase is controlled at the transcriptional level, and Ace2 promoter activity is DNA damage response (DDR)-dependent. Both pharmacological global DDR inhibition of ATM kin…