No detectable effect of RNA-binding protein Hfq absence in Staphylococcus aureus

BACKGROUND: The RNA-binding protein Hfq is involved in stress and virulence of several pathogens, probably due to its role as mediator in small RNA (sRNA)-mRNA interactions. In this study, we investigate the function of Hfq in the Gram-positive pathogen Staphylococcus aureus, by constructing hfq null mutant derivatives. RESULTS: We report that unexpectedly, in S. aureus, Hfq does not seem to play a crucial role in stress response, RNAIII or spa mRNA quantity and exoprotein expression, as tested in three virulent genetic backgrounds. Moreover, a global analysis of the RN6390 hfq mutant, which tests ~ 2000 phenotypes, supports our results concerning the non-implication of Hfq in stress response, and shows that Hfq is also not involved in resistance to several chemical agents and antibiotics and does not seem to be implicated in metabolic pathways. CONCLUSION: Our data suggest that although sRNA-mRNA interactions in S. aureus are decisive for gene expression regulation, they do not require the RNA-chaperone protein Hfq. These interactions possibly require an RNA-chaperone protein other than Hfq, which remains to be found

La diversification des stratégies résidentielles des élites à Varsovie après 1989

Après 1989, l’offre immobilière s’est extrêmement diversifiée en Pologne. Les élites, grandes gagnantes de la transformation politico-économique, cherchent à emménager dans des logements correspondant à leur statut social et permettant de les distinguer du reste de la population. Malgré quelques similitudes dans leurs trajectoires, préférences et choix résidentiels, des profils types se dessinent au sein des individus considérés comme des élites à Varsovie. Cet article essaie de dépasser la différenciation classique des élites selon les professions proposant une typologie originale de celles-ci selon des caractéristiques socio-économiques, démographiques, d’habitation, de choix de vie et de préférences résidentielles. La diversité de l’habitat élitaire devient alors une composante de cette distinction existante entre les différentes élites.After 1989, the real estate offer in Poland became greatly diversified. Elites, considered as main winners of the politico-economic transformation, commenced to seek for a dwelling corresponding to their social status and allowing them to stand out from other social groups. In Warsaw, despite some resemblances in their residential trajectories, preferences and choices, the different profiles within the group of elites may be distinguished. This article attempts to go beyond the classical differentiation of elites by their occupation and proposes an original typology of elites regarding socio-economic, demographic and residential characteristics, life styles as well as residential preferences. The diversity of the elitist housing has become one of the components of the process of distinction between different fractions in the group of elites.Nach 1989 hat sich der Immobiliensektor grundlegend verändert. Die Eliten des Landes, die am meisten vom politischen Umbruch profitierten, wollten sich in ihrem Wohnraum vom Rest der Gesellschaft stärker differenzieren. In Warschau lassen sich verschiedene Strömungen innerhalb der Eliten unterscheiden. Unterschiedliche Präferenzen in der Immobilienauswahl haben das Stadtbild stark beeinflusst. Dieser Artikel löst sich von der klassischen Analyse der Elitenbildung und bietet eine eigenständig entworfene Typologie, die sich auf sozioökonomische und demographische Kriterien, geschmackliche Präferenzen und Lifestyle-Gewohnheiten der oberen Gesellschaftsschicht bezieht. Wohnen ist aber auch innerhalb der Eliten zu einem grundlegenden Unterscheidungsmerkmal geworden.

Genetic parameters for first lactation dairy traits in the Alpine and Saanen goat breeds

International audienc

Format de fichiers PDF : guide méthodologique (Le)

A la demande des Archives de France, et avec le soutien du TGE Adonis, la société NUMEN et le CINES ont lancé une étude qui vise à faire le point sur les différents formats PDF. Une première partie de cette étude a été publiée sous la forme d\u27un guide méthodologique

Rapid Effect of Treatment of Psoriatic Erythrocytes with the Synthetic Retinoid Acitretin to Increase 8-Azido Cyclic AMP Bindings to the RI Regulatory Subunit

We have recently demonstrated a deficiency in the cyclic adenosine monophosphate (cAMP) – dependent protein kinases (PKA), the intracellular mediator of AMP, in psoriasis. This enzyme defect is expressed in fibroblasts and in red blood cells isolated from psoriatic patients. In these cells, the abnormality noted in cAMP binding to PKA correlates well with the severity of the disease and is corrected by long-term treatment with etretinate. In this study, we determined the effect of oral administration of acitretin in four psoriatic patients on the altered cAMP binding observed with the RI regulatory subunit of PKA in erythrocytes prepared from these patients. Acitretin (30 mg/day) induced a rapid (within 1 h) increase in the ability of the RI regulatory subunit of erythrocytes to bind the 8-azido[32P]cAMP photoaffinity analogue of cAMP. The maximal plateau for this effect of acitretin was observed within 24 h of treatment and preceded the clinical improvement of the disease. The effect of acitretin was dose-dependent, with the maximal response observed at 40 mg acitretin/d. In addition, the rapid exposure (15 mm) of erythrocytes isolated from untreated patients exhibiting severe psoriasis to acitretin also promoted an increase in binding of 8-azido[32P]cAMP to the RI cAMP binding protein. Retinoic acid and 13-cis-retinoic acid were as efficient as acitretin in inducing the increase in binding of 8- azido[32P]cAMP to the RI regulatory subunit, whereas arotinoid was without effect. These results suggest that acitretin may act to modify PKA (the RI regulatory subunit) at the post-transcriptional level, and this may reflect, in part, on the mechanism of action of this synthetic retinoid. Further, monitoring this biochemical event may be helpful in determining the choice of retinoid therapy and in the management of its pharmacology

33356 A multinational chart review to examine gastrointestinal symptoms and their management in patients treated with apremilast for plaque psoriasis

Background: Diarrhea and nausea are the most common adverse events observed in phase 3 clinical trials and real-world studies of apremilast, an oral phosphodiesterase-4 inhibitor indicated for moderate-to-severe plaque psoriasis. Methods: A retrospective chart review was conducted between June and November 2020 in the United States (US) and France among patients with moderate psoriasis experiencing gastrointestinal (GI) symptoms within 3 months of initiating apremilast. Results: Dermatologists in US (200) and in France (52) abstracted patient charts (US: 494, France: 128). The following GI symptoms were reported: ‒diarrhea (US: 67% [331/494]; France: 76% [97/128]) with median time from onset to resolution/improvement of 26 days (US) and 21 days (France) ‒nausea (US: 52% [255/494]; France: 34% [44/128]) with median time from onset to resolution/improvement of 21 days (US) and 24 days (France). Management strategies for diarrhea included pharmacologic (loperamide/bismuth subsalicylate/racecadotril) with or without nonpharmacologic (dietary modifications, taking with food)/fiber (US: 30% [99/331], France: 41% [40/97]) and nonpharmacologic only (US: 32% [105/331], France: 27% [26/97]). Management strategies for nausea included pharmacologic (diphenhydramine/metoclopramide/metopimazine) with or without nonpharmacologic (dietary modifications, taking with food, avoidance of vigorous activity) (US: 5% [14/255], France: 30% [13/44]) and nonpharmacologic only (US: 58% [147/255], France: 36% [16/44]). Resolution/improvement of GI symptoms was observed in patients who used pharmacologic strategies and nonpharmacologic strategies. Conclusions: Recommendations to manage diarrhea and nausea after apremilast initiation with pharmacologic or non-pharmacologic strategies were effective and symptoms usually resolved within 3-4 weeks of onset

Whole genome mapping of 5' RNA ends in bacteria by tagged sequencing : A comprehensive view in Enterococcus faecalis

Enterococcus faecalis is the third cause of nosocomial infections. To obtain the first comprehensive view of transcriptional organizations in this bacterium, we used a modified RNA-seq approach enabling to discriminate primary from processed 5'RNA ends. We also validated our approach by confirming known features in Escherichia coli. We mapped 559 transcription start sites and 352 processing sites in E. faecalis. A blind motif search retrieved canonical features of SigA- and SigN-dependent promoters preceding TSSs mapped. We discovered 95 novel putative regulatory RNAs, small- and antisense RNAs, and 72 transcriptional antisense organisations. Presented data constitute a significant insight into bacterial RNA landscapes and a step towards the inference of regulatory processes at transcriptional and post-transcriptional levels in a comprehensive manner

Spanish Questionnaires for the Assessment of Pelvic Floor Dysfunctions in Women: A Systematic Review of the Structural Characteristics and Psychometric Properties

Background: Pelvic floor dysfunctions affect a third of the adult female population, including a large number of clinical conditions, which can be evaluated through validated questionnaires that inform us of the status and perception of women both objectively and subjectively. The main objective of this study was to review and explain the topics of the validated questionnaires in Spanish on pelvic floor dysfunctions and to review their psychometric properties. Methods: A systematic review was carried out in the PUBMED and WOS databases. The keywords used were in PUBMED: ((((((((“Fecal Incontinence” [Mesh]) OR “Urinary Incontinence” [Mesh]) OR “Pelvic Organ Prolapse” [Mesh]) OR “Pelvic Floor Disorders” [Mesh]) OR “Sexual Dysfunction, Physiological” [Mesh]) OR “Pelvic Girdle Pain” [Mesh]) OR “sexual function” [Title/Abstract]) OR “Prolapse” [Title/Abstract]) AND “Surveys and Questionnaires” [Mesh] AND “Validation” [Title/Abstract] combined with the Boolean operators “AND”/“OR”. In contrast, in WOS, a segregated search was carried out with each of the terms of pelvic floor dysfunction together with “Validation” and “Surveys and Questionnaires”. All articles published up to 19 November 2021 were considered. Methodological quality was assessed with the COSMIN scale. Results: A total of 687 articles were identified, of which 13 were included. The evaluated questionnaires and the structural characteristics and psychometric properties of each of them were collected. Conclusion: The Spanish versions of the questionnaires show good basic structural and psychometric characteristics for the evaluation of patients with pelvic floor dysfunctions and that they resemble other versions of the same questionnaire published in other languages