11 research outputs found
«Multifunctional cyclodextrin-based N,N-bidentate ligands for aqueous Heck arylation»
International audienc
Relationship between cardiac microvascular dysfunction measured with 82Rubidium-PET and albuminuria in patients with diabetes mellitus
International audienceBackgroundAlbuminuria is of one the strongest predictors of cardiovascular disease (CVD) in diabetes. Diabetes is associated with cardiac microvascular dysfunction (CMD), a powerful, independent prognostic factor for cardiac mortality. The aim of this study was to evaluate the relationship between CMD and microvascular complications in patients without known CVD.MethodsIn this monocentric study, myocardial flow reserve (MFR) was measured with cardiac 82Rubidium positron emission tomography (Rb-PET) in 311 patients referred to nuclear medicine department of Bichat University Hospital for screening of coronary artery disease from 2012 to 2014. Patients with hemodynamically relevant stenosis on coronary angiography or myocardial ischemia on Rb-PET were excluded. Among patients with diabetes, MFR values were compared according to the presence of retinopathy and albuminuria.ResultsOverall, 175 patients (118 with type 2 diabetes) were included. MFR was significantly lower in patients with diabetes compared with those without diabetes (2.6 ± 1.1 vs. 3.3 ± 1.7; p < 0.005). In patients with diabetes, MFR decreased progressively in relation to albumin urinary excretion (normoalbuminuria: 2.9 ± 1.1, microalbuminuria: 2.3 ± 1.0, macroalbuminuria: 1.8 ± 0.7; p < 0.0001). MFR was not significantly different in patients with vs. without retinopathy (2.4 ± 1.0 vs. 2.7 ± 1.1, p = 0.07). Microalbuminuria and macroalbuminuria remained strongly associated with impaired MFR after multiple adjustments [odds ratio 2.6 (95% CI 1.1â8.4) and 5.3 (95% CI 1.2â44.7), respectively]. This association was confirmed when analyses were restricted to patients with low levels of coronary calcifications on computed tomography.ConclusionsImpaired MFR was more frequent in patients with diabetes and was strongly associated with the degree of albuminuria suggesting that CMD and albuminuria might share common mechanisms
Dynamique d'expression du virus de la peste porcine africaine et impact sur les voies de l'immunité innée et la virulence
International audienceLe virus de la peste porcine africaine (PPA), seul membre de la famille des Asfaviridae, est un virus enveloppĂ© Ă ADN double brin linĂ©aire qui cause de graves Ă©pidĂ©mies dans les Ă©levages porcins Ă travers le monde. Il nâexiste aujourdâhui aucun traitement contre ce virus extrĂȘmement transmissible de par sa persistance dans lâenvironnement et dont la mortalitĂ© approche les 100 % pour les formes aigĂŒes. Les formes aiguĂ«s de la maladie sont causĂ©es par les souches virulentes du virus, par opposition aux formes attĂ©nuĂ©es qui nâont quâun impact mineur sur lescochons infectĂ©s. Nous avons posĂ© lâhypothĂšse que les souches virulentes de la PPA seraient en mesure de contrecarrer les rĂ©ponses de lâimmunitĂ© innĂ©e de lâhĂŽte, contrairement aux souches attĂ©nuĂ©es. Notre objectif est donc de comprendre les interactions entre les diffĂ©rentes souches virales et lâimmunitĂ© innĂ©e au sein des macrophages pulmonaires alvĂ©olaires de lâhĂŽte, premiĂšres cibles de lâinfection. Nous adoptons une approche transcriptomique par qPCR microfluidique, encomparant lâexpression des gĂšnes viraux et dâimmunitĂ© innĂ©e lors de lâinfection avec des souches virulentes (L60) ou attĂ©nuĂ©es (NHP/68) de la PPA. Pour suivre lâactivation et les perturbations des voies de signalisation, nous Ă©tudions la dynamique de translocation nuclĂ©aire de NF-ÎșB et IRF3 par microscopie confocale. Nous avons ainsi identifiĂ© des gĂšnes viraux diffĂ©rentiellement exprimĂ©s entre les souches NHP/68 et L60 (A179L, A224L, A238L, A276R, A528R, DP96R et I329L). AprĂšsavoir sous-clonĂ© les gĂšnes A238L et A528R dans des vecteurs dâexpression, nous avons montrĂ© que la surexpression de A238L diminuait la translocation nuclĂ©aire de NF-ÎșB. Notre dĂ©marche vise Ă dĂ©terminer quels gĂšnes viraux diffĂ©rentiellement exprimĂ©s entre les souches virulentes et attĂ©nuĂ©es sont capables dâimpacter les voies canoniques de lâimmunitĂ© innĂ©e, et sâils agissent seuls ou en combinaison
Type 1 Diabetes in People Hospitalized for COVID-19: New Insights From the CORONADO Study
International audienc