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Effect of trifolium pratense extract on methionine-choline- deficient diet-induced steatohepatitis in C57BL/6 mice

Chinese Journal of Natural Medicines 2014年第3期12卷 194-198页

作者： CHEN Tong ZHONG Fo-Jin HONG Ya-Min SU Wei-Jiao ZHUANG Li-Li QIU Long-Xin School of Life Sciences Longyan University Fujian Key Laboratory of Preventive Veterinary Medicine and Biotechnology

AIM： The potential of trifolium pratense （red clover） extract in the prevention of lipid disorder has attracted increasing attention in recent years. In this study, the aim was to determine whether and how red clover extract affected the development of murine diet-induced non-alcoholic steatohepatitis. METHOD： Non-alcoholic steatohepatitis was induced in C57BL/6 mice by feeding mice with a methionine-choline-deficient （MCD） diet. Hematoxylin and eosin staining was used for histological analyses. Real-time PCR was used to analyze the mRNA expression levels. RESULTS： Hepatic steatosis and neeroinflammation was observed in MCD diet-fed mice, and this diet-induced steatosis was sig- nificantly attenuated, whereas liver inflammation was not significantly attenuated, by red clover extract treatment. Consistent with the results of H＆E staining, the MCD diet-induced increase of liver triglycerides and cholesterol levels were significantly reduced by red clover extract treatment. However, with the improvement in hepatic steatosis, mRNA levels of acetyl CoA oxidase, carnitine palrnitoyl transferase-l, and liver fatty acid-binding protein, three genes regulated by peroxisome proliferator-activated receptor （PPAR） ct, were unaffected. CONCLUSION： Red clover extract alleviated MCD diet-induced hepatic steatosis, but did not ameliorate liver inflammation in C57BL/6 mice, and the improvement in hepatic steatosis was not through activating PPAR^t.

关键词： trifolium pratense Steatohepatitis Hepatic steatosis Liver inflammation Peroxisome prolifemtor-activated receptor a

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Selection of rhizobial strains differing in their nodulation kinetics under low temperature in four temperate legume species

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Grassland Research 2023年第3期2卷 197-211页

作者： Emmanuelle D'Amours Annick Bertrand Jean Cloutier François-Philippe Chalifour Annie Claessens Solen Rocher Marie Bipfubusa Chantal Giroux Chantal J.Beauchamp Agriculture and Agri-Food Canada Quebec Research and Development CentreQuebec CityQuebecCanada Département de phytologie Facultédes Sciences de l'Agriculture et de l'AlimentationUniversitéLavalQuébec CityQuebecCanada Centre de recherche sur les grains(CÉROM) Saint-Mathieu-de-BeloeilQuebecCanada

Background:Winter climate change including frequent freeze-thaw episodes and shallow snow cover will have major impacts on the spring regrowth of perennial ***-bloating perennial forage legume species including sainfoin,birdsfoot trefoil,red clover,and alsike clover have been bred for their adaptation to harsh winter *** parallel,the selection of cold-tolerant rhizobial strains could allow earlier symbiotic nitrogen(N)fixation to hasten spring regrowth of ***:To identify strains forming nodules rapidly and showing high N-fixing potential,60 rhizobial strains in association with four temperate legume species were evaluated over 11 weeks under spring soil temperatures for kinetics of nodule formation,nitrogenase activity,and host ***:Strains differed in their capacity to form efficient nodules on legume hosts over *** showing higher nitrogenase activity were arctic strain N10 with sainfoin and strain L2 with birdsfoot *** clovers,nitrogenase activity was similar for control and inoculated plants,likely due to formation of effective nodules in controls by endophyte rhizobia present in ***:Selection based on nodulation kinetics at low temperature,nitrogenase activity,and yield was effective to identify performant rhizobial strains for legume *** use of cold-tolerant strains could help mitigate winter climatic changes.

关键词： cold-tolerant rhizobia Lotus corniculatus low temperature Onobrychis viciifolia rhizobium symbiosis trifolium hybridum trifolium pratense

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