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Chinese Chemical Letters 2015年第1期26卷 50-54页

作者： Jayant Sindhu Harjinder Singh J.M.Khurana Chetan Sharma K.R.Aneja department of Chemistry Delhi University department of microbiology Kurukshetra University

A series of novel thiazolidinedione-triazole hybrids were synthesized by one pot reaction between thiazolidine-2.4-dione,substituted aryl aldehydes,piopargyl bromide and substituted aryl azides using piperidine,CuSO4· 5H2O and sodium ascorbate as catalysts in PEG-400 as a highly efficient and green *** thiazolidinedione-triazole hybrids were subjected to in vitro antibacterial activity against four strains *** *** subtilis,Escherichia coli,Pseudomonas aeruginosa and antifungal activity against two fungal strains namely,Aspergillus niger and Aspergillus flavus.

关键词： Multicomponent AntibacterialAntifungal 1,2,3-Triazoles thiazolidine-2,4-diones

Multiparametric analysis of colorectal cancer immune responses

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World Journal of Gastroenterology 2018年第27期24卷 2995-3005页

作者： Julia KH Leman Sarah K Sandford Janet L Rhodes Roslyn A Kemp department of microbiology and Immunology University of Otago

Colorectal cancer(CRC) is a heterogeneous disease, with a diverse and plastic immune cell infiltrate. These immune cells play an important role in regulating tumour growth-progression or elimination. Some populations of cells have a strong correlation with disease-free survival, making them useful prognostic markers. In particular, the infiltrate of CD3^+ and CD8^+ T cells into CRC tumours has been validated worldwide as a valuable indicator of patient prognosis. However, the heterogeneity of the immune response, both between patients with tumours of different molecular subtypes, and within the tumour itself, necessitates the use of multiparametric analysis in the investigation of tumour-specific immune responses. This review will outline the multiparametric analysis techniques that have been developed and applied to studying the role of immune cells in the tumour, with a focus on colorectal cancer. Because much of the data in this disease relates to T cell subsets and heterogeneity, we have used T cell populations as examples throughout. Flow and mass cytometry give a detailed representation of the cells within the tumour in a single-cell suspension on a per-cell basis. Imaging technologies, such as imaging mass cytometry, are used to investigate increasing numbers of markers whilst retaining the spatial and structural information of the tumour section and the infiltrating immune cells. Together, the analyses of multiple immune parameters can provide valuable information to guide clinical decision-making in CRC.

关键词： Colorectal cancer Flow cytometry Immune cells Multiparametric analysis Immunohistochemistry Mass cytometry Microscopy

Probiotic fermentation of polyphenols: potential sources of novel functional foods

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Food Production, Processing and Nutrition 2022年第1期4卷 259-274页

作者： Rohit Sharma Bhawna Diwan Brij Pal Singh Saurabh Kulshrestha Faculty of applied Sciences&Biotechnology Shoolini University of Biotechnology and Management SciencesSolan173229India department of microbiology Central University of HaryanaMahendragarhIndia

Fermented functional food products are among the major segments of food processing *** imparts several characteristic effects on foods including the enhancement of organoleptic characteristics,increased shelf-life,and production of novel health beneficial ***,in addition to macronutrients present in the food,secondary metabolites such as polyphenols are also emerging as suitable fermentable *** the traditional antimicrobial view of polyphenols,accumulating research shows that polyphenols exert differential effects on bacterial communities by suppressing the growth of pathogenic microbes while concomitantly promoting the proliferation and survival of probiotic ***,probiotic bacteria not only survive among polyphenols but also induce their fermentation which often leads to improved bioavailability of polyphenols,production of novel metabolic intermediates,increased polyphenolic content,and thus enhanced functional capacity of the fermented *** addition,selective fermentation of combinations of polyphenol-rich foods or fortification with polyphenols can result in novel functional *** present narrative review specifically explores the potential of polyphenols as fermentable substrates in functional *** discuss the emerging bidirectional relationship between polyphenols and probiotic bacteria with an aim at promoting the development of novel functional foods based on the amalgamation of probiotic bacteria and polyphenols.

关键词： Probiotics Polyphenols Fermented Foods Lactic acid bacteria Tea

Extract from Phyllanthus urinaria *** Hepatitis B Virus Replication and Expression in Hepatitis B Virus Transfection Model in Vitro

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Chinese Journal of Integrative Medicine 2015年第12期21卷 938-943页

作者：吴莹禄颖李姝玉宋月晗郝钰王谦 department of Immunology and microbiology Beijing University of Chinese Medicine

Objective： To explore the effects of the extract from Phyllanthus urinaria L. on hepatitis B virus （HBV） replication and expression in HBV transient transfection model in vitro. Methods： The eukaryotic expression plasmid pHBVI.1, which contains l.l-fold-overlength genome of HBV, was transfected into the human hepatoma cell line, HepG2, to establish and assess the HBV transient transfection model. The extract from Phyllanthus urinaria L. was prepared in different concentrations and methyl thiazolyl tetrazolium was used to detect the maximum nontoxic concentration of the drug. The extract from Phyllanthus urinaria L. were added into the transfected cell, at the concentrations of 0.8, 0.2 and 0.05 g/L, respectively. Four days after drug application, enzyme-linked immuno sorbent assay was used to detect the concentration of HBsAg in the supernatants, Southern blot was applied to analyze HBV DNA level, and Western blot was used to detect the expression of HBcAg in cells. Results： After the transfection of plasmid pHBVI.1 into HepG2 cells, the concentration of HBsAg in supernatants was increased obviously as compared with that of the normal cells （P〈0.05）, and all expected HBV replicative intermediates were confirmed by Southern blot analysis, which ensured the successful establishment of the HBV transient transfection model. After the application of drugs at the concentrations of 0.8 and 0.2 g/L, the level of HBsAg was obviously decreased in the supernatants, as compared with that of the virus group （P〈0.05）; Southern blot showed that the level of HBV rc DNA, ds DNA, ss DNA was obviously reduced compared with that of the virus group （P〈0.01）; Western blot revealed that the expression of HBcAg in the drug group was obviously inhibited, as compared with that of the virus group （P〈0.01）. Conclusions： The extract from Phyllanthus urinaria L. obviously inhibited replication and expression of HBV in HBV transfected cell lines in vitro, thus exerting distinctive anti-HBV effect

关键词： Phyllanthus urinaria L. hepatitis B virus replication expression transient transfection model Chinese medicine

Distribution of Pill Millipedes (Arthrosphaera) and Associated Soil Fauna in the Western Ghats and West Coast of India

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Pedosphere 2008年第6期18卷 749-757页

作者： K. M. ASHWINI K. R. SRIDHAR microbiology and Biotechnology Department of Biosciences Mangalore University Mangalagangotri

Seven sampling sites in each of three biomes (Western Ghats, foothills of Western Ghats and west coast) of south- western India were investigated to study the distribution, abundance and ecology of pill millipedes (Arthrosphaera) and associated fauna in relation to edaphic features. Abundance and biomass of Arthrosphaera and other millipedes were the highest in Western Ghats, while earthworms were in foothills. Arthrosphaera magna and Arthrosphaera spp. were common in Western Ghats and foothills respectively, while no Arthrosphaera were found in the west coast. None of the sampling sites consisted of more than one species of Arthrosphaera. Biomass of Arthrosphaera, other millipedes and earthworms significantly differed in Western Ghats (P = 9.48 × 10-7) and foothills (P = 1.35 × 10-8), as did the biomass of species of Arthrosphaera (P = 2.76 × 10-7) between Western Ghats and foothills. Correlation analysis revealed that biomass of Arthrosphaera was significantly (P = 0.01, r = 0.45) correlated with soil organic carbon rather than other edaphic fea- tures (pH, phosphate, calcium and magnesium). Distribution pattern, abundance, biomass and ecology of Arthrosphaera of Western Ghats in relation to soil qualities were compared with millipedes of other regions of the world.

关键词： Arthrosphaera distribution edaphic features pill millipedes Western Ghats

Analysis of cellulolytic and hemicellulolytic enzyme activity within the Tipula abdominalis （Diptera： Tipulidae） larval gut and characterization of Crocebacterium ilecola gen. nov., sp. nov., isolated from the Tipula abdominalis larval hindgut

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Insect Science 2010年第3期17卷 291-302页

作者： Theresa E. Rogers Joy Doran-Peterson microbiology department University of Georgia Athens Georgia USA

In forested stream ecosystems of the north and eastern United States, larvae of the aquatic crane fly Tipula abdominalis are important shredders of leaf litter detritus. T. abdominalis larvae harbor a dense and diverse microbial community in their hindgut that may aide in the degradation oflignocellulose. In this study, the activities ofcellulolytic and hemicellulolytic enzymes were demonstrated from hindgut extracts and from bacterial isolates using model sugar substrates. One of the bacterial isolates was further characterized as a member of the family Microbacteriaceae. Taxonomic position of the isolate within this family was determined by a polyphasic approach, as is commonly employed for the separation of genera within the family Microbacteriaceae. The bacterial isolate is Gramtype positive, motile, non-sporulating, and rod-shaped. The G ＋ C content of the DNA is 64.9 mol%. The cell wall contains B2y type peptidoglycan, D- and L-diaminobutyric acid as the diamino acid, and rhamnose as the predominant sugar. The predominant fatty acids are 12-methyltetradecanoic acid （ai-C15：0） and 14-methylhexadecanoic acid （ai-C17：0）. The isolate forms a distinct lineage within the family Microbacteriaceae, as determined by 16S rRNA sequence analysis. We propose the name Crocebacterium ilecola gen. nov., sp. nov., to accommodate this bacterial isolate. The type species is T202T （ATCC BAA-1359; GenBank Accession DQ826511）.

关键词： cellulolytic hemicellulolytic hindgut

Mining diversity of the natural biorefinery housed within Tipula abdominalis larvae for use in an industrial biorefinery for production of lignocellulosic ethanol

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Insect Science 2010年第3期17卷 303-312页

作者： Dana M. Cook Joy Doran-Peterson microbiology department University of Georgia Athens Georgia USA

Although they are the largest taxonomic group of animals, relatively few insects have been examined for symbiotic relationships with micro-organisms. However, this is rapidly changing because of the potential for examination of the natural insectmicrobe-lignocellulose interactions to provide insights for biofuel technology. Micro-organisms associated with lignocellulose-consuming insects often facilitate the digestion of the recalcitrant plant diet; therefore these microbial communities may be mined for novel lignocellulose-degrading microbes, or for robust and inexpensive biocatalysts necessary for economically feasible biofuel production from lignocellulose. These insect-microbe interactions are influenced by the ecosystem and specific lignocellulose diet, and appre- ciating the whole ecosystem-insect-microbiota-lignocellulose as a natural biorefinery provides a rich and diverse framework from which to design novel industrial processes. One such natural biorefinery, the Tipula abdominalis larvae in riparian ecosystems, is reviewed herein with applications for biochemical processes and overcoming challenges involved in conversion of lignocellulosic biomass to fuel ethanol. From the dense and diverse T. abdominalis larval hindgut microbial community, a cellulolytic bacterial isolate, 27C64, demonstrated enzymatic activity toward many model plant polymers and also produced a bacterial antibiotic. 27C64 was co-cultured with yeast in fermentation of pine to ethanol, which allowed for a 20% reduction of commercial enzyme. In this study, a micro-organism from a lignocellulose-consuming insect was successfully applied for improvement of biomass-to-biofuel technology.

关键词： ethanol hydrolytic enzymes insect-associated microorganisms lignocellulose

Management of acute cough by Zataria multiflora Boiss as an alternative treatment

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Journal of Integrative Medicine 2018年第1期16卷 20-25页

作者： Mohaddese Mahboubi department of microbiology Medicinal Plants Research Center of Barij

Cough, as a defensive reflux mechanism, removes foreign objects and secretions from bronchi and bron- chioles of airways. Zataria multiflora is a popular plant for treatment of cough in Iranian traditional med- icine. The aim of this review was to evaluate the potency of Z. multiflora as an alternative treatment in management of acute cough and its possible mechanisms of action. Here the authors compiled informa- tion about Z. multiflora in the treatment of cough from all accessible resources and books. The results of this investigation showed that there were five clinical studies that evaluated the efficacy of Z. multiflora essential oil or extract alone （n = 1 ）, in combination with Althaea officinalis （n = 2） or Foeniculum vulgate essential oil （n = 1 ）, in the form of syrup （n = 3）, oral drop （n = 1 ） and soft capsule （n = 1 ）, for the treatment of acute cough in comparison with placebo or synthetic drugs （bromhexine, dextromethorphan and clobutinol）. All clinical studies confirmed the efficacy ofZ multiflora in the amelioration of acute cough in pediatric （n = 1） and adult patients （n = 4） without any adverse effects. Different mechanisms, such as anti-inflammatory, analgesic, antimicrobial, relaxant and immune-enhancement, may be responsible for the efficacy of Z. multiflora in cough relief. Other clinical trials can be performed with Z. multiflora in com- bination with ivy leaf extract or primrose root extract on patients with cough.

关键词： Zataria multiflora Foeniculum vulgate Althaea officinalis Cough Medicine. Iranian traditiona

Mixed Matrix Membranes of Polysulfone/Polyimide Reinforced with Modified Zeolite Based Filler: Preparation, Properties and Application

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Chinese Journal of Polymer Science 2018年第1期36卷 65-77页

作者： Sedra Tul Muntha Muhammad Siddiq Ayesha Kausar Anum Khan department of Chemistry Quaid i Azam University department of microbiology Quaid i Azam University

In this work, polysulfone/polyimide（PSf/PI） mixed matrix membranes were fabricated by reinforcement of modified zeolite（MZ） particles through solution casting method for investigation of antibacterial activity against two gram negative bacteria（Salmonella typhi, Klebsella pneumonia） and two gram positive bacteria（Staphylococcus aureus, Bacillus subtilis）. The modified zeolite particles were incorporated to PSf and PI matrix and the influence of these particles on thermal, mechanical and structural properties was evaluated. The morphological evolution was investigated through scanning electron microscopy（SEM） and transmission electron microscopy（TEM） analysis, which revealed good compatibility between organic polymer matrix and inorganic filler. Mechanical stability was investigated by tensile testing while thermal analysis was evaluated by thermogravimetric analysis（TGA） and differential scanning calorimetry（DSC）. This revealed improvement in thermal properties with increasing filler concentration from 1 wt% to 10 wt%. Structural analysis was successfully done using X-ray diffraction analysis（XRD） and Fourier transform infrared（FTIR） spectroscopy. Solvent content of fabricated mixed matrix membranes was observed to decrease while moving from more hydrophilic to less hydrophilic solvent. However, addition of filler content enhanced the porosity of fabricated membranes. The synthesized mixed matrix membranes exhibited good antibacterial activity and the highest activity was shown by PSf/PI/MZ mixed matrix membrane. Therefore, the combination effect of PSf, PI and MZ sufficiently enhanced the antibacterial activity of mixed matrix membranes.

关键词： Modified zeolite Polysulfone/polyimide blend membrane Mixed matrix membrane Thermal analysis Antibacterial activity

Fungicide tolerant Bradyrhizobium japonicum mitigate toxicity and enhance greengram production under hexaconazole stress

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Journal of Environmental Sciences 2019年第4期31卷 92-108页

作者： Mohammad Shahid Mohd.Saghir Khan department of Agricultural microbiology Faculty of Agricultural SciencesAligarh Muslim University

Bacterial strain RV9 recovered from greengram nodules tolerated 2400 μg/mL of hexaconazole and was identified by 16 S rDNA sequence analysis as Bradyrhizobium japonicum(KY940048). Strain RV9 produced IAA(61.6 μg/mL), ACC deaminase(51.7 mg/(protein·hr)), solubilized TCP(105 μg/mL), secreted 337.6 μg/mL EPS, and produced SA(52.2 μg/mL) and 2,3-DHBA(28.3 μg/mL). Exopolysaccharides produced by strain RV9 was quantified and characterized by SEM, AFM, EDX and FTIR. Beyond tolerance limit,hexaconazole caused cellular impairment and reduced the viability of strain RV9 revealed by SEM and CLSM. Hexaconazole distorted the root tips and altered nodule structure leading thereby to reduction in the performance of greengram. Also, the level of antioxidant enzymes, proline, TBARS, ROS and cell death was increased in hexaconazole treated *** images revealed a concentration dependent increase in the characteristic green and blue fluorescence of hexaconazole treated roots. The application of B. japonicum strain RV9 alleviated the fungicide toxicity and improved the measured plant characteristics. Also,rhizobial cells were localized inside tissues as revealed by CLSM. Colonization of *** strain RV9 decreased the levels of CAT, POD, APX, GPX and TBARS by 80%, 5%,13%, 13% and 19%, respectively over plants grown at 80 μg/(hexaconazole·kg) soil. The ability to detoxify hexaconazole, colonize plant tissues, secrete PGP bioactive molecules even under fungicide pressure and its unique ability to diminish oxidative stress make *** an attractive choice for remediation of fungicide polluted soils and to concurrently enhance greengram production under stressed environment.

关键词： Hexaconazole toxicity Greengram Bradyrhizobium japonicum Cellular damage Nodule ultrastructure Oxidative stress