Stable cell line of T-SV40 immortalized human glomerular visceral epithelial cells

Stable cell line of T-SV40 immortalized human glomerular visceral epithelial cells. Human subcultures (third passage) of glomerular visceral epithelial cells (VEC) isolated from one month old kidney were successfully transfected by two recombinant plasmids containing the cloned oncogenes from the simian virus 40 large T antigen and H-ras gene. One postcrisis cell clone (56/10 A1) was selected, propagated and characterized. One hundred percent of the 56/10 A1 cells (current passage > 100th; doubling time 30 hrs) expressed the nuclear T-SV40 antigen assayed by IF; the cells failed to express H-ras (RNA blot analysis). Immortalized cells were morphologically and phenotypically compared to parental cell type (third passage). Phenotypic characterization of the 56/10 Al cells was achieved using indirect immunofluorescence (IF) and immunogold silver staining coupled to bright field and epipolarization microscopy. Both parental and 56/10 A1 cells displayed positivity for cytokeratin, CALLA and PHM5, whereas von Willebrand factor was not detected in the two cell types. Since we have previously shown that human glomerular epithelial cells in culture synthetize plasminogen activator (PA) related compounds, we investigated the secretion pattern of these products in parental and transfected cells. Zymographic analysis of secreted PA related compounds revealed production of free urokinase (u-PA) and type 1 plasminogen activator inhibitor (PAI-1) complexed to tissular plasminogen activator (t-PA). Finally, in the transfected cells, increased cGMP generation under atrial natriuretic factor (ANF) stimulation agreed with previous work performed on nontransfected human VEC. In conclusion, the establishment of a human permanent cell line which retains most of the phenotypic features of parental glomerular visceral epithelial cells should represent a new tool to study human glomerular cell functions

Adenoma Detection by Endocuff-Assisted versus Standard Colonoscopy in Routine Practice: A Cluster-Randomised Crossover Trial

International audienceOBJECTIVE: Endocuff Vision (ECV) is the second generation of a device designed to improve polyp detection. The aim of this study was to evaluate its impact on adenoma detection rate (ADR) in routine colonoscopy. DESIGN: This cluster-randomised crossover trial compared Endocuff-assisted (ECV+) with standard (ECV-) colonoscopy. Two teams of 11 endoscopists each with prior ECV experience, balanced in terms of basal ADR, gender and case volume were compared. In randomised fashion, the teams started with ECV+ or ECV- and switched group after inclusion of half of the cases. The main outcome criterion was ADR difference between ECV+ and ECV-. Subgroup analysis was done for physicians with low and high ADR (< or ≥q 25%). RESULTS: During two periods of 20 and 21 weeks, respectively, the 22 endoscopists included 2058 patients (1032 ECV- vs 1026 ECV+, both groups being comparable). Overall ADR for both groups taken together was higher with ECV (39.2%) than without (29.4%; p<0.001) irrespective of the sequence of use (ECV+ or ECV- first), but mostly in adenomas <1\,cm. In the physician subgroup analysis, only high detectors showed a significant ADR increase (from 31% to 41%, p<0.001), while the increase in the low detectors was not significant (from 24% to 30%, p=0.11). ECV had a positive impact in all colonic locations, except for the rectum. No ECV- related complication was reported. CONCLUSION: We observed a significant ADR difference of approximately 10% by the use of ECV. By subgroup analysis, this increase was significant only in physicians classified as high detectors. TRIAL REGISTRATION NUMBER: ClinicalTrials.gov (NCT03344055)

Quelle éducation avec la Covid-19

APPEL A CONTRIBUTION : QUE NOUS APPREND LA PANDEMIE? Numéro HS Recherches et Educations (Juillet 2020) (HCERES 70ème section) Qu'est ce que la pandémie nous apprend de nos sociétés, de nos politiques de santé publique, des souverainetés épistémologiques de la recherche et des praxis individuelles et collectives? Solidarités ou/ et d'exclusions? Stratégies d'adaptation au confinement ou de rejet? Comment agit-on dans ce monde incertain, soumis à l'autorité des politiques de gestion d'un virus? Soumission volontaire à l'autorité ou organisation des résistances? Quels sont les savoirs exercés sur quels pouvoirs ? Quelles sont les légitimités et les responsabilités plurielles : individuelles, collectives, politiques et sociales ? Quels sont les usages sociaux et politiques des résultats de la recherche des experts ? Qu’apprenons nous des expériences de prévention individuelles, européennes et internationales ? Comment s’exercent les pouvoirs à partir des savoirs des épistémologies et des évidence-base medecine ? Comment l’histoire des épidémies pourrait répondre à notre présent ? Quel futur pour notre société après la pandémie ? Quelles seront nos inégalités sociales ? Vers quelles écologies ? Quelles résistances ? Quel mode de vie ? Quelles expériences corporelles de l’absence de toucher et de la distanciation ? Quelle croissance ? Quelle décroissance ? Quelles solidarités face à la techno-économique ? La revue Recherches & Educations lance un appel à contribution, multi disciplinaire, sur le « dispositif covid 19 » pendant le confinement imposé aux populations. Elle propose de réunir les textes critiques et réflexifs sur ce que nous apprend l’épidémie et la pandémie de nous même, de notre relation au vivant, à la mondialisation néolibérale, aux souverainetés de santé, au gouvernement des corps, de la psyché et de la vie, aux politiques de prévention, aux représentations de l’épidémie, aux pratiques corporelles visuelles et tactiles, aux modes de résistances et aux praxis du quotidien du présent et de demain. Texte à adresser (avant le 30 mai 2020) en 30.000 signes à [email protected] [email protected] [email protected]