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Macleaya cordata extract alleviated oxidative stress and altered innate immune response in mice challenged with enterotoxigenic Escherichia coli

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Science China(Life Sciences) 2019年第8期62卷 1019-1027页

作者： Guiping Guan Sujuan Ding Yulong Yin veeramuthu duraipandiyan Naif Abdullah Al-Dhabi Gang Liu College of Bioscience and Biotechnology Hunan Agricultural UniversityChangsha410128China College of Animal Science South China Agricultural UniversityGuangzhou510642China Hunan Province Key Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-ecological Processes inSubtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesNational Engineering Laboratory for Pollution Controland Waste Utilization in Livestock and Poultry ProductionChangsha410125China Department of Botany and Microbiology College of ScienceKing Saud UniversityP.O.Box2455Riyadh11451Saudi Arabia

This study examines the effects of dietary Macleaya cordata extract(MCE) on bacterial burden and resistance to enterotoxigenic Escherichia coli(ETEC) in ICR mice. ICR mice were randomly distributed into one of the following groups:(i) basal diet;(ii)basal diet with 200 mg kg–1 MCE;(iii) basal diet challenged with ETEC;and(iv) basal diet with 200 mg kg–1 MCE and challenged with ETEC. Following a 7-day period of pre-treatment, CTRL-ETEC and MCE-ETEC mice were subjected to oral infection using 5×108 E. coli SEC 470. The results showed dietary 200 mg kg–1 MCE markedly reduced intestinal ETEC burden(P<0.05) and the disease-associated mortality was significantly alleviated in the MCE treated group(P<0.05). In addition,dietary MCE markedly alleviated ETEC-induced oxidative stress, evidenced by the lowered methane dicarboxylic aldehyde(MDA) abundance and enhanced activities of catalase and glutathione peroxidase(P<0.05). Furthermore, MCE mice exhibited higher immune activity, which might have further mediated ETEC infection. These results indicate MCE plays a preventative role with respect to ETEC infection. Future research should aim to develop MCE as a therapeutic approach to the promotion of intestinal health and a safeguard against ETEC infection.

关键词： Macleaya cordata extract enterotoxigenic Escherichia coli bacterial burden oxidative stress

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Antibacterial activity of some actinomycetes from Tamil Nadu,India

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Asian Pacific Journal of Tropical Biomedicine 2012年第12期2卷 936-943页

作者： Pachaiyappan Saravana Kumar John Poonga Preetam Raj veeramuthu duraipandiyan Savarimuthu Ignacimuthu Division of Microbiology Entomology Research InstituteLoyola College Department of Botany and Microbiology College of ScienceKing Saud University

Objective:To isolate novel actinomycetes and to evaluate their antibacterial ***:Three soil samples were collected from Vengodu(village)in Kanchipuram district,Tamil Nadu,*** were isolated using serial dilution and plating method on actinomycetes isolation ***:Totally 35 isolates were obtained on the basis of colony characteristics on actinomycetes isolation *** the isolates were screened for antibacterial activity by cross streak *** and optimization of day were done for the potent strains using Nathan's agar well diffusion *** of bioactive compounds from significant active isolates was done by using different *** most active isolate VAS 10 was identified as Actinobacterium Loyola PBT VAS 10(accession ***501398)using 16s rRNA sequence *** hexane,ethyl acetate,dichloromethane and butanol extracts of VAS 10 were tested against *** maximum antibacterial activity was observed in dichloromethane and ethyl acetate;maximum zones of inhibition were observed against Enterococcus *** rRNA secondary structure and the restriction sites of Actinobacterium Loyola VAS 10 were predicted using Genebee and NEBCutter online tools ***:The present study showed that among the isolated actinomycetes,Actinobacterium Loyola PBT VAS 10(accession ***501398)showed good antibacterial activity against the tested bacteria.

关键词： VAS10 Actinobacterium Antibacterial activity Solvent extract

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Isolation and identification of alkaloids and anthocyanins from flower and bulb of Lycoris radiata using HPLC and LC-ESI-MS

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Journal of Agricultural Chemistry and Environment 2013年第1期2卷 22-26页

作者： Jin-Hyuk Chun In Hyuk Jang Mariadhas Valan Arasu Naif Abdullah Al-Dhabi veeramuthu duraipandiyan Dong-Hoon Lee Sanghyun Lee Sun-Ju Kim Department of Bio-Environmental Chemistry Chungnam National University Daejeon Republic of Korea Department of Botany and Microbiology College of Science King Saud University Riyadh Saudi Arabia Department of Formulation Sungbo Chemicals Co. Ltd. Goyang-si Republic of Korea Department of Integrative Plant Science Chung-Ang University Anseong Republic of Korea Yeonggwang Agricultural Technology Center Yeonggwang-Gun Republic of Korea

Three anthocyanins (cyanidin 3-diglucoside, cyanidin 3-sambubioside and cyanidin 3-glucoside) together with eleven known alkaloids (lycoricidine, hipppeastrine,O-Demethyllycoramin, lycoricidinol, galanthine, lycorine, lycorenine, lycoramine, galanthamine, homolycorine and pretazettine) were identified in the flower and bulb of Lycoris radiata using high-performance liquid chromatography coupled with UV detection and electrospray ionization mass spectrometry. Anthocyanins play a major role in protecting plant’s DNA from the UV spectrum of sunlight and also in attracting insects for the purpose of pollination. Thus, knowledge on the contents and types of anthocyanins of L. radiata will help to evaluate the adaptive evolution of flowers and provide useful information for the ornamental breeding.

关键词： Lycoris radiata Anthocyanins Alkaloids Flower Bulb

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