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Impact of Celosia cristataExtract on Adipogenesis of Native Human CD34+/CD31-Cells

Journal of Cosmetics, Dermatological Sciences and Applications 2013年第3期3卷 55-63页

作者： Richard Fitoussi David Estève Anne-Sophie Delassus katell vié Centre de Recherche Clarins Pontoise France Inserm UMR1048 Team 1 Institute of Metabolic and Cardiovascular Diseases Toulouse France

Background: The adipose tissue mainly consists of adipocytes but also contains non-adipose cells. Among them, progenitor cells represent a local pool of immature cells that, in vitro, can undergo various lineage differentiation processes. These cells are thought to contribute to normal homeostasis of the adipose tissue through adipogenesis but also to the growth of the adipose tissue under chronic energy overload. The aim of the present study is to evaluate in vitro the capacity of a Celosia cristata extract to impact the adipogenic potential of native human adipose tissue progenitor cells, i.e. commitment and differentiation towards adipogenic lineage. Methods: Native adipose tissue progenitor cells were isolated by immunoselection/depletion approaches from human subcutaneous adipose tissues. Two distinct cell culture conditions were used to assess the effect of Celosia cristata extract on commitment and differenciation of progenitor cells. Cells were cultured either in differentiation medium for 10 days in the presence/absence of Celosia cristata extracts to study the impact on differentiation or first cultured in a commitment-inducing medium, with or without Celosia cristata extract, for 48 h and then cultured 10 days in differentiation medium to assess the impact on commitment. In both experimental series, the fate of progenitor cells was studied by quantification of lipids and by determining the expression of key genes involved in adipogenesis. Results: Data show that Celosia cristata extract reduces lipid content of progenitor cells undergoing differentiation. This reduction correlates with a reduced expression of C/EBPα. When progenitor cells are placed in commitment-inducing conditions, Celosia cristata extract induces a more potent reduction of lipid content. This reduction correlates with a decrease in the expression levels of master genes involved in adipogenesis: the genes of transcription factors PPARγ2 and C/EBPα as well as marker genes coding for LPL

关键词： Adipose Tissue Stem/Progenitor Cells Adipogenic Commitment Adipogenic Differentiation

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Effect of Red Panax ginsengon Mitochondrial Dynamics and Bioenergetics in HaCaT Cells Exposed to Urban Pollutants

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Journal of Cosmetics, Dermatological Sciences and Applications 2021年第2期11卷 84-95页

作者： Gallic Beauchef Magali Favre-Mercuret Beatrice Blanc Richard Fitoussi katell vié Nathalie Compagnone Clarins Research laboratory Pontoise France ICDD-sas Gemenos France Bliive Consulting Auriol France

Background: Urban air pollution contributes to lung and cardiovascular system dysfunction, making it a major concern for human health. Its impact on skin integrity, associated with increased occurrence of atopic dermatitis, is now recognized, but its cellular mechanisms remain poorly understood. Objective: In the present study we aimed at establishing the impact of urban pollutant on mitochondrial dynamics and bioenergetics using the HaCaT cell model. We also sought to establish the protective effect of ECH-5195 (red Panax ginseng extract), standardized in ginsenosides, in reversing pollution-induced mitochondrial defects. Methods: Urban pollution exposure was mimicked by 1 h exposure of HaCaT cells with standardized atmospheric particulate matter containing PAHs, nitro-PAHs, PCB congeners, and chlorinated pesticides with a mean particulate diameter of 5.85 μm (SRM1648). Results: The presence of urban pollutant in the cultures increased the prevalence of hyperfission by 1.41-fold (p = 0.023) and fission by 1.35 fold (p = 0.006) in the reticular mitochondrial network. ECH-5195 reduced both pollution-induced hyperfission by 0.54-fold (p = 0.004) and fission by 0.68-fold (p = 0.0006) normalizing the mitochondrial reticular network. Pollution exposure was associated with a significant reduction of basal OCR and increased lactate production, pushing the cell to rely on glycolysis for ATP production. When ECH-5195 was used, OCR was significantly increased, and the glycolytic contribution to ATP production was reduced while both oxidative phosphorylation and mitochondrial respiration were increased demonstrating mitochondrial re-engagement in ATP production. Conclusions: Pollution exposure was disruptive for both the mitochondrial network dynamics and mitochondrial respiration. Ginsenosides in ECH-5195 efficiently protected both from pollution-induced defects.

关键词： Ginsenosides Arylhydrocarbon Receptor Particulate Matter HaCaT Cells Mitochondria Dynamics Cell Bioenergetics

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Therapeutic Effects of an Alpha-Casozepine and White Fish Muscle Hydrolyzed Complementary Feed on Canine Separation-Related Disorders and Quality of Life of Dogs and Their Pet Owners

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Open Journal of Veterinary Medicine 2023年第6期13卷 68-81页

作者： Gaëlle Porcheron Marie Bodet katell Poiron Julie Brault Nicolas Massal Olivier Roy Oscar Fantini Cebiphar Fondettes France Clinique Vétérinaire de la victoire Tours France Clinique Vétérinaire LESVET Lesneven France Clinique Vétérinaire du Gabereau Chateuneuf-sur-Loire France Clinique Vétérinaire de la Paix Pau France Vetoquinol SA Paris France

Background: Separation-related disorders are prevalent in dogs and can result in problem behaviours such as inappropriate elimination, destructive behaviour, and distress vocalizations which occur when an owner is absent or perceived as absent. Numerous natural products are marketed for managing anxiety in dogs;however, few, if any, of these products have documented evidence of efficacy in veterinary behaviour. Purpose: This open, multicentric clinical trial aimed to assess the efficacy of a new supplement containing alpha-casozepine and fish muscle hydrolysate on the separation-related problem in dogs and the impact on the quality of life of dogs and their pet owners. Material and Methods: Fifty-one dogs with clinical signs compatible with separation-related problems were included. The dogs were treated with a complementary feed (Zylkene Plus, Vetoquinol, France) for 30 days. Separation-related behaviour assessment (SRP), emotional disorders assessment (EDED) and the quality of life (QoL) of the pets and their pet owner were assessed at baseline and the end of the study by the veterinarians. In addition, owners were asked to rate their dog’s SRP weekly after enrolment using the same questionnaire that the veterinarian used at the beginning of the study. Results: There was a statistically significant improvement in the SRP, EDED, and QoL scores (P Conclusion: The results of this study support the hypothesis that the combination of alpha-casozepine and fish muscle hydrolysate is a promising and effective option to reduce the frequency and severity of separation-related behaviour in dogs and improve the quality of dogs and their owners.

关键词： Alpha-Casozepine Fish Muscle Hydrolysate Canine Separation-Related Disorders Dogs

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TEM Assessments of the Restructuring Effects of an Emollient Cream on the stratum corneum

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Journal of Cosmetics, Dermatological Sciences and Applications 2011年第4期1卷 125-132页

作者： Richard Fitoussi katell vie éric Mathieu éric Gooris Joseph Hemmerlé 不详

The structure of the stratum corneum contributes to the barrier function of the epidermis. Skin barrier recovery is of utmost importance after epidermal tissue damage. The aim of this study was to describe, at the cellular level, the structural effects resulting from topical application of a hand-cream onto normal skin and to investigate the potential repair mechanisms induced by the emollient on altered tissue. Transmission electron microscopy (TEM) was used to compare the architectures of the horny layers from: 1) ex-vivo cultured human skin;2) skin treated by topical application of a hand-cream emulsion;3) explants exposed to sodium lauryl sulfate (SLS);4) SLS-treated explants that underwent subsequent topical application of the emollient emulsion. These TEM assessments allowed identifying the structural changes occurring in the stratum corneum of skin explants exposed to SLS and/or treated with an emollient. Results strongly suggest that both, SLS-induced damage and emollient-driven repair process take place in the stratum corneum, at the cellular level. One can envisage that the observed restructuring effects after topical application of the skin-care product are likely to ameliorate or restore the barrier function of the stratum corneum. In this, the properties of the emollient go beyond the cosmetic feel.

关键词： Emollient Skin stratum corneum Corneocytes TEM

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Study of Gas Heating by a Microwave Plasma Torch

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Journal of Modern Physics 2012年第10期3卷 1603-1615页

作者： katell Gadonna Oliviez Leroy Philippe Leprince Luis Lemos Alves Cazoline Boisse-Laporte Instituto de Plasmas e Fusao Nuclear Instituto Superior Técnico Universidade Técnica de Lisboa Lisboa Portugal Laboratoire de Physique des Gaz et des Plasmas UMR 8578 CNRS Université Paris-Sud OzsayFrance

Among the different types of microwave plasma torches, the axial injection torch (TIA) has been used for several years to create chemically active species, in applications such as gas analysis, surface processing and gaseous waste treatments. The TIA allows the coupling of microwave energy (2.45 GHz) to a gas injected axially at the nozzle’s exit. The TIA produces non-local thermodynamic equilibrium plasmas with a high luminosity and a maximum density of charged particles at the nozzle’s exit. The present work is dedicated to study the plasma created by a TIA, running at atmospheric pressure. The study involves both experiment and modeling of this torch, in order to maximize the coupling between the microwave power and the plasma and to define the optimum plasma and flow operating conditions for plasma-to-gas heat transfer.

关键词： Microwave Plasma Torch Non-Equilibrium Plasma Atmospheric Pressure Thermal Transfer Flow Modeling

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自动化在现代安全中的运用

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智能制造 2019年第7期 16-17页

作者： katell Thielemann Beth Schumaecker David Mahdi Gartner

当一家医疗服务机构的首席信息安全官Amy 仔细查看全公司的云安全时,她意识到默认访问控制模型正在引起各种访问问题。BeWell 的基础设施即服务(IaaS)提供商默认设置成只允许企业主访问的安全状态。另一方面,软件即服务(SaaS)提供商默... 详细信息

当一家医疗服务机构的首席信息安全官Amy 仔细查看全公司的云安全时,她意识到默认访问控制模型正在引起各种访问问题。BeWell 的基础设施即服务(IaaS)提供商默认设置成只允许企业主访问的安全状态。另一方面,软件即服务(SaaS)提供商默认设置成完全开放访问。在使用多个云的情况下,Amy 无法手动放宽IaaS 的权限,也无法对SaaS 进行充分的控制。那么该如何解决这个问题呢?答案是自动化。

关键词：信息安全自动化访问控制模型基础设施即服务默认设置 IaaS SaaS 软件即服务

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