Clermont-Ferrand, France

University of Auvergne
Clermont-Ferrand, France

The University of Auvergne , also known as “Universite d'Auvergne Clermont-Ferrand I” or Clermont-Ferrand I, is a French public university, based in Clermont-Ferrand, in the region of Auvergne. It is under the Academy of Clermont-Ferrand. It is the head of PRES Clermont Université consortium; PRES being the league of elite universities of France. Hence, the university is constantly ranked as a leading academic institution by various French academicians and newspapers, most notably Le Figaro.The Université d’Auvergne was founded in 1519 and as such in 1806 as a medical school. Soon the university established itself as a premier center for medical studies, and continues to do so for over 100 years. It became the Université d’Auvergne Clermont-Ferrand 1 on March 16, 1976.The university has a status of EPSCSP, which is the highest French accreditation. This leads to high emphasis over the professional and research areas of the university. A comprehensive institution, it offers more than 60 national degrees in Medicine, Pharmacy, Dentistry, Law and Forensics, Economics and Politics, Management and Administration, and Technology. Wikipedia.

Time filter
Source Type

University of Auvergne and French National Center for Scientific Research | Date: 2017-08-09

The invention relates to an implant material for filling bone defects, for bone regeneration, and for bone tissue engineering, to an implant comprising said material, and to methods for manufacturing such an implant. The hybrid implant material according to the invention comprises: a biodegradable polymer P soluble in at least one solvent S1 and insoluble in at least one solvent S, different from the solvent S1; and a bioactive glass made of SiO2 and CaO and optionally containing P2O5 and/or optionally doped with strontium, characterized in that said implant includes a layering of a porous part having more than 90% by number of pores whose largest dimension is greater than or equal to 100 m, and a dense part (2, 20, 200, 2000, 20000) having more than 80% by number of pores whose largest dimension is less than 50 m. The invention is useful in the field of bone regeneration, particularly in the field of bone tissue engineering.

University of Auvergne | Date: 2017-09-20

The invention relates to the use of alkyl gallate to stimulate the natural defenses of plants and to a method for stimulating the natural defenses of plants, wherein said method includes applying a composition, containing an alkyl gallate, to said plants.

Cardot J.-M.,University of Auvergne | Davit B.M.,U.S. Food and Drug Administration
AAPS Journal | Year: 2012

In vitro-in vivo correlation (IVIVC) is a biopharmaceutical tool recommended to be used in development of formulation. When validated, it can speed up development of formulation, be used to fix dissolution limits and also as surrogate of in vivo study. However, as do all tools, it presents limitations and traps. The aim of the present paper is to investigate five common traps which could limit either the setting or use of IVIVC (1) using mean or individual values; (2) correction of absolute bioavailability; (3) correction of lag time and time scaling; (4) flip-flop model; and (5) predictability corrections. © 2012 American Association of Pharmaceutical Scientists.

Sahut-Barnola I.,University of Auvergne
Oncogene | Year: 2017

Adrenocortical carcinoma (ACC) is a rare cancer with poor prognosis. Pan-genomic analyses identified p53/Rb and WNT/β-catenin signaling pathways as main contributors to the disease. However, isolated β-catenin constitutive activation failed to induce malignant progression in mouse adrenocortical tumors. Therefore, there still was a need for a relevant animal model to study ACC pathogenesis and to test new therapeutic approaches. Here, we have developed a transgenic mice model with adrenocortical specific expression of SV40 large T-antigen (AdTAg mice), to test the oncogenic potential of p53/Rb inhibition in the adrenal gland. All AdTAg mice develop large adrenal carcinomas that eventually metastasize to the liver and lungs, resulting in decreased overall survival. Consistent with ACC in patients, adrenal tumors in AdTAg mice autonomously produce large amounts of glucocorticoids and spontaneously activate WNT/β-catenin signaling pathway during malignant progression. We show that this activation is associated with downregulation of secreted frizzled related proteins (Sfrp) and Znrf3 that act as inhibitors of the WNT signaling. We also show that mTORC1 pathway activation is an early event during neoplasia expansion and further demonstrate that mTORC1 pathway is activated in ACC patients. Preclinical inhibition of mTORC1 activity induces a marked reduction in tumor size, associated with induction of apoptosis and inhibition of proliferation that results in normalization of corticosterone plasma levels in AdTAg mice. Altogether, these data establish AdTAg mice as the first preclinical model for metastatic ACC.Oncogene advance online publication, 3 April 2017; doi:10.1038/onc.2017.54. © 2017 Macmillan Publishers Limited, part of Springer Nature.

Thibault R.,University of Auvergne | Pichard C.,University of Geneva
Annals of Nutrition and Metabolism | Year: 2012

Undernutrition is insufficiently detected in in- and outpatients, and this is likely to worsen during the next decades. The increased prevalence of obesity together with chronic illnesses associated with fat-free mass (FFM) loss will result in an increased prevalence of sarcopenic obesity. In patients with sarcopenic obesity, weight loss and the body mass index lack accuracy to detect FFM loss. FFM loss is related to increasing mortality, worse clinical outcomes, and impaired quality of life. In sarcopenic obesity and chronic diseases, body composition measurement with dual-energy X-ray absorptiometry, bioelectrical impedance analysis, or computerized tomography quantifies the loss of FFM. It allows tailored nutritional support and disease-specific therapy and reduces the risk of drug toxicity. Body composition evaluation should be integrated into routine clinical practice for the initial assessment and sequential follow-up of nutritional status. It could allow objective, systematic, and early screening of undernutrition and promote the rational and early initiation of optimal nutritional support, thereby contributing to reducing malnutrition-induced morbidity, mortality, worsening of the quality of life, and global health care costs. Copyright © 2011 S. Karger AG.

Raisch J.,University of Auvergne
World journal of gastroenterology : WJG | Year: 2013

MicroRNAs, a key class of gene expression regulators, have emerged as crucial players in various biological processes such as cellular proliferation and differentiation, development and apoptosis. In addition, microRNAs are coming to light as crucial regulators of innate and adaptive immune responses, and their abnormal expression and/or function in the immune system have been linked to multiple human diseases including inflammatory disorders, such as inflammatory bowel disease, and cancers. In this review, we discuss our current understanding of microRNAs with a focus on their role and mode of action in regulating the immune system during inflammation and carcinogenesis.

Matsuzaki S.,Estaing University Hospital Center | Matsuzaki S.,University of Auvergne | Darcha C.,CHU Clermont Ferrand
Human Reproduction | Year: 2012

Background Endometrium is derived from intermediate mesoderm via mesenchymal to epithelial transition (MET) during development of the urogenital system. By retaining some imprint of their mesenchymal origin, endometrial epithelial cells may be particularly prone to return to this state, via epithelial to mesenchymal transition (EMT). We hypothesized that pelvic endometriosis originates from retrograde menstruation of endometrial tissue and that EMT-like and MET-like processes might be involved in the pathogenesis of pelvic endometriosis.Methods We investigated commonly used molecular markers for EMT, including cytokeratin, E-cadherin, N-cadherin, vimentin, S100A4 and dephosphorylated beta-catenin by immunohistochemistry in different forms of pelvic endometriosis: deep infiltrating endometriosis, ovarian endometriosis and superficial peritoneal endometriosis (red and black lesions), as well as samples of menstrual endometrium, other benign ovarian cysts (mucinous and serous cyst adenoma), and abdominal scar endometriosis for comparison. Results Epithelial cells of red peritoneal lesions and ovarian endometriosis showed less epithelial marker (cytokeratin, P < 0.0001) expression and more mesenchymal marker (vimentin and/or S100A4, P < 0.0001) expression than those of menstrual endometrium. In contrast, epithelial cells of black peritoneal lesions and deep infiltrating endometriosis showed more epithelial marker (E-cadherin) expression than those of menstrual endometrium (P < 0.03), red peritoneal lesions (P < 0.0001) and ovarian endometriosis (P< 0.0001), but maintained expression of some mesenchymal markers (vimentin, S100A4). In addition, dephosphorylated beta-catenin protein expression was significantly higher in epithelial cells of deep infiltrating endometriosis (P < 0.0001) than in epithelial cells of red and black peritoneal lesions and ovarian endometriosis. Conclusions EMT-like and MET-like processes might be involved in the pathogenesis of pelvic endometriosis. © 2012 The Author.

Duvivier C.,University of Auvergne
Journal of Regional Science | Year: 2013

This paper assesses whether cities enhance the technical efficiency of nearby rural counties by allowing for heterogeneous urban effects both by region and city type. An empirical application is demonstrated using the Chinese county-level agricultural data from 2005 to 2009. We find that urban proximity significantly enhances efficiency in the Eastern region, while its effect is lower and less significant for the Central region and not significant at all for the Western region. In addition, urban effects vary across the urban hierarchy. We find that provincial-level cities have a deteriorating impact on technical efficiency, while lower-level cities enhance technical efficiency in most regions. Implications of these findings in terms of urban and regional planning are discussed. © 2013 Wiley Periodicals, Inc.

Tubert-Jeannin S.,University of Auvergne
Cochrane database of systematic reviews (Online) | Year: 2011

Dietary fluoride supplements were first introduced to provide systemic fluoride in areas where water fluoridation is not available. Since 1990, the use of fluoride supplements in caries prevention has been re-evaluated in several countries. To evaluate the efficacy of fluoride supplements for preventing dental caries in children. We searched the Cochrane Oral Health Group's Trials Register (to 12 October 2011), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2011, Issue 3), MEDLINE via OVID (1950 to 12 October 2011), EMBASE via OVID (1980 to 12 October 2011), WHOLIS/PAHO/MEDCARIB/LILACS/BBO via BIREME (1982 to 12 October 2011), and Current Controlled Trials (to 12 October 2011). We handsearched reference lists of articles and contacted selected authors. We included randomised or quasi-randomised controlled trials comparing, with minimum follow-up of 2 years, fluoride supplements (tablets, drops, lozenges) with no fluoride supplement or with other preventive measures such as topical fluorides in children less than 16 years of age at the start. The main outcome was caries increment measured by the change in decayed, missing and filled tooth surfaces (DMFS). Two review authors, independently and in duplicate, assessed the eligibility of studies for inclusion, and carried out risk of bias assessment and data extraction. In the event of disagreement, we sought consensus and consulted a third review author. We contacted trial authors for missing information. We used the prevented fraction (PF) as a metric for evaluating the efficacy of the intervention. The PF is defined as the mean caries increment in controls minus mean caries increment in the treated group divided by mean caries increment in controls. We conducted random-effects meta-analyses when data could be pooled. We assessed heterogeneity in the results of the studies by examining forest plots and by using formal tests for homogeneity. We recorded adverse effects (fluorosis) when the studies provided relevant data. We included 11 studies in the review involving 7196 children.In permanent teeth, when fluoride supplements were compared with no fluoride supplement (three studies), the use of fluoride supplements was associated with a 24% (95% confidence interval (CI) 16 to 33%) reduction in decayed, missing and filled surfaces (D(M)FS). The effect of fluoride supplements was unclear on deciduous or primary teeth. In one study, no caries-inhibiting effect was observed on deciduous teeth while in another study, the use of fluoride supplements was associated with a substantial reduction in caries increment.When fluoride supplements were compared with topical fluorides or with other preventive measures, there was no differential effect on permanent or deciduous teeth.The review found limited information on the adverse effects associated with the use of fluoride supplements. This review suggests that the use of fluoride supplements is associated with a reduction in caries increment when compared with no fluoride supplement in permanent teeth. The effect of fluoride supplements was unclear on deciduous teeth. When compared with the administration of topical fluorides, no differential effect was observed. We rated 10 trials as being at unclear risk of bias and one at high risk of bias, and therefore the trials provide weak evidence about the efficacy of fluoride supplements.

National Graduate School of Chemistry of Clermont Ferrand and University of Auvergne | Date: 2012-12-31

The present invention relates to the use of compounds for the treatment or prevention of pain in mammals, in particularly in human beings, and also to a process for preparing these compounds.

Loading University of Auvergne collaborators
Loading University of Auvergne collaborators