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Tropicimonas sediminicola sp. nov., isolated from marine sediment
Shin, Na-Ri,Roh, Seong Woon,Kim, Min-Soo,Yun, Bora,Whon, Tae Woong,Kim, Young-Ok,Bae, Jin-Woo Microbiology Society 2012 International journal of systematic and evolutiona Vol.62 No.10
<P>A novel Gram-negative, obligately aerobic, non-motile, rod-shaped bacterium, strain M97<SUP>T</SUP>, was isolated from marine sediment of a cage-cultured ark clam farm on the south coast of Korea. Strain M97<SUP>T</SUP> was positive for oxidase and catalase. Optimal growth occurred at 37 °C, with 1-2 % (w/v) NaCl and at pH 7-8. The main cellular fatty acids were C16 : 0, C18 : 1ω7<I>c</I>, C12 : 0 3-OH and cyclo-C19 : 0ω8<I>c</I>. The polar lipids comprised diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, an unknown aminolipid and three unknown lipids. The predominant respiratory quinone was ubiquinone-10 (Q-10). Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain M97<SUP>T</SUP> belongs to the genus <I>Tropicimonas</I>, with highest sequence similarity to <I>Tropicimonas aquimaris</I> DPG-21<SUP>T</SUP> (99.0 %). The DNA G+C content of strain M97<SUP>T</SUP> was 68.5 mol%. Mean DNA-DNA relatedness between strain M97<SUP>T</SUP> and <I>T. aquimaris</I> DPG-21<SUP>T</SUP> was 46±10 %. Based on phylogenetic, phenotypic and genotypic analyses, strain M97<SUP>T</SUP> is considered to represent a novel species of the genus <I>Tropicimonas</I>, for which the name <I>Tropicimonas sediminicola</I> sp. nov. is proposed. The type strain is M97<SUP>T</SUP> ( = KACC 15544<SUP>T</SUP> = JCM 17731<SUP>T</SUP>).</P>
Shin, Na-Ri,Lee, June-Chul,Lee, Hae-Youn,Kim, Min-Soo,Whon, Tae Woong,Lee, Myung-Shik,Bae, Jin-Woo BMJ Publishing Group Ltd 2014 Gut Vol.63 No.5
<P><B>Background</B></P><P>Recent evidence indicates that the composition of the gut microbiota contributes to the development of metabolic disorders by affecting the physiology and metabolism of the host. Metformin is one of the most widely prescribed type 2 diabetes (T2D) therapeutic agents.</P><P><B>Objective</B></P><P>To determine whether the antidiabetic effect of metformin is related to alterations of intestinal microbial composition.</P><P><B>Design</B></P><P>C57BL/6 mice, fed either a normal-chow diet or a high-fat diet (HFD), were treated with metformin for 6 weeks. The effect of metformin on the composition of the gut microbiota was assessed by analysing 16S rRNA gene sequences with 454 pyrosequencing. Adipose tissue inflammation was examined by flow cytometric analysis of the immune cells present in visceral adipose tissue (VAT).</P><P><B>Results</B></P><P>Metformin treatment significantly improved the glycaemic profile of HFD-fed mice. HFD-fed mice treated with metformin showed a higher abundance of the mucin-degrading bacterium <I>Akkermansia</I> than HFD-fed control mice. In addition, the number of mucin-producing goblet cells was significantly increased by metformin treatment (p<0.0001). Oral administration of <I>Akkermansia muciniphila</I> to HFD-fed mice without metformin significantly enhanced glucose tolerance and attenuated adipose tissue inflammation by inducing Foxp3 regulatory T cells (Tregs) in the VAT.</P><P><B>Conclusions</B></P><P>Modulation of the gut microbiota (by an increase in the <I>Akkermansia</I> spp. population) may contribute to the antidiabetic effects of metformin, thereby providing a new mechanism for the therapeutic effect of metformin in patients with T2D. This suggests that pharmacological manipulation of the gut microbiota in favour of <I>Akkermansia</I> may be a potential treatment for T2D.</P>
Prognostic value of pretreatment hemoglobin Level in patients with early cervical cancer
( Na Ri Shin ),( Yoo Young Lee ),( Seung Hyun Kim ),( Chel Hun Choi ),( Tae Joong Kim ),( Jeong Won Lee ),( Duk Soo Bae ),( Byoung Gie Kim ) 대한산부인과학회 2014 Obstetrics & Gynecology Science Vol.57 No.1
Objective The purpose of this study is to investigate the prognostic role of pretreatment anemia in patients with early cervical cancer who underwent radical hysterectomy. Methods In this study, we retrospectively enrolled patients with early cervical cancer (International Federation of Obstetrics and Gynecology stage IB to IIA) who were treated at Samsung Medical Center, Seoul, Korea, from 1996 to 2007. Results We retrospectively enrolled 805 patients. Median pretreatment hemoglobin (Hb) level was 12.8 g/dL (4.0?16.9) in all patients. Ninety-ninth out of 805 patients had pretreatment anemia (12.3%). Pretreatment anemia was significantly associated with large tumor size, advanced clinical stage, and parametrial invasion. In multivariate analysis, higher pretreatment Hb entailed better prognostic significance in disease free survival (hazard ratio [HR], 0.88; 95% confidence interval [CI], 0.078?0.99) but not in overall survival (HR, 0.94; 95% CI, 0.80?1.10). Conclusion In conclusion, we found that the negative association between pretreatment Hb level and tumor size and the impact of anemia before treatment on disease free survival adjusted for other factors including clinical stage and pathological findings in early stage cervical cancer.
LuxS and smcR Quorum-Sensing System of Vibrio vulnificus as an Important Factor for In Vivo Survival
( Na Ri Shin ),( Chang Ho Baek ),( Deog Yong Lee ),( Young Wook Cho ),( Dae Kyun Park ),( Ko Eun Lee ),( Kun Soo Kim ),( Han Sang Yoo ) 한국미생물생명공학회 2005 Journal of microbiology and biotechnology Vol.15 No.6