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- 저자 : ( Masashi Ohno ) (검색결과 3 건)
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Shigeki Bamba,Osamu Inatomi,Atsushi Nishida,Masashi Ohno,Takayuki Imai,Kenichiro Takahashi,Yuji Naito,Junichi Iwamoto,Akira Honda,Naohiro Inohara,Akira Andoh 대한장연구학회 2022 Intestinal Research Vol.20 No.3
Background/Aims: Crosstalk between the gut microbiota and bile acid plays an important role in the pathogenesis of gastrointestinal disorders. We investigated the relationship between microbial structure and bile acid metabolism in the ileal mucosa of Crohn’s disease (CD).Methods: Twelve non-CD controls and 38 CD patients in clinical remission were enrolled. Samples were collected from the distal ileum under balloon-assisted enteroscopy. Bile acid composition was analyzed by liquid chromatography-mass spectrometry. The gut microbiota was analyzed by 16S rRNA gene sequencing.Results: The Shannon evenness index was significantly lower in endoscopically active lesions than in non-CD controls. β-Diversity, evaluated by the UniFrac metric, revealed a significant difference between the active lesions and non-CD controls (<i>P</i>=0.039). The relative abundance of <i>Escherichia</i> was significantly higher and that of <i>Faecalibacterium</i> and <i>Roseburia</i> was significantly lower in CD samples than in non-CD controls. The increased abundance of <i>Escherichia</i> was more prominent in active lesions than in inactive lesions. The proportion of conjugated bile acids was significantly higher in CD patients than in non-CD controls, but there was no difference in the proportion of primary or secondary bile acids. The genera <i>Escherichia</i> and <i>Lactobacillus</i> were positively correlated with the proportion of conjugated bile acids. On the other hand, <i>Roseburia</i>, <i>Intestinibacter</i>, and <i>Faecalibacterium</i> were negatively correlated with the proportion of conjugated bile acids.Conclusions: Mucosa-associated dysbiosis and the alteration of bile acid composition were identified in the ileum of CD patients. These may play a role in the pathophysiology of ileal lesions in CD patients.
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Prevalence and risk factors of hepatits C virus infection among Koreans in rural area of Korea
Shin, Hai-Rim,Kim, Joon-Youn,Ohno, Tomoyoshi,Cao, Kun,Mizokami, Masashi,Risch, Harvey,Kim, SooRyang 동아대학교 산업의학연구소 2000 산업의학연구소 논총 Vol.- No.5
In a Korean rural area with a high incidence of liver cancer, a molecular epidemiological study was conducted to estimate the prevalence of hepatitis C virus (HCV) infection and to determine the distribution of HCV genotype and transmission routes of HCV infection, The study population is those who volunteered to participate in a health survey in 1993 and were over 10 years of age. Those who were anti-HCV-positive and 20 of their spouses were re-examined in 1995 and tested for HCV genotype. A phylogenetic tree was constructed after sequencing analysis of core and envelope regions from the subjects with genotype 2a without a blood transfusion history. The age- and sex-standardized prevalence of anti-HCV was 5.52%. In a multivariate analysis, transfusion history was not associated with anti-HCV-pos-itivity, but a history of acupuncture (adjusted odds ratio = 2.2, 95% confidence interval = 1.0, 4.7) and a history of surgical operation (adjusted odds ratio = 2.0, 95%, confidence interval = 1.0, 4.1) were associated. The prevalence of HCV genotype 2a was the highest, and genotype 1b was less frequent. The phylogenetic tree showed strong homology among our samples with Japanese HCV strains. The present study suggests that there is a highly endemic area of HCV infection in Korea and that this endemicity is probably associated with a parenteral source of HCV infection other than blood transfusion. The study also suggests that some of the HCV infection was spread through non-sterilized or non-disposable acupuncture needles in this HCV endemic
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( Yasuhiro Morita ),( Shigeki Bamba ),( Osamu Inatomi ),( Kenichiro Takahashi ),( Takayuki Imai ),( Masaki Murata ),( Masashi Ohno ),( Masaya Sasaki ),( Tomoyuki Tsujikawa ),( Akira Andoh ) 대한장연구학회 2020 Intestinal Research Vol.18 No.2
Background/Aims: We retrospectively analyzed Crohn’s disease (CD) patients with small intestinal strictures who under went single-balloon enteroscopy (SBE) to ascertain whether prototype SBEs with a passive bending mechanism and high force transmission insertion tube had better insertability in the small intestine than a conventional SBE. Methods: Among 253 CD patients who underwent SBE, we identified 94 CD patients who had undergone attempted endoscopic balloon dilatation (EBD) for small intestinal stenosis for inclusion in this study. We analyzed whether the type of scope used for their initial pro cedure affected the cumulative surgery-free rate. For the insertability analysis, patients who underwent SBE at least twice were divided into 3 groups according to the type of scope used: conventional SBE only, prototype SBE only, and both conventional and prototype SBEs. For each group, depth of insertion, procedure time, and number of EBDs were compared in the same pa tient at different time points. Results: The success rate of EBD was 88.3%. The 5- and 10-year cumulative surgery-free rate was 75.7% and 72.8%, respectively. Cox regression analysis indicated that the factors contributing to surgery were long stricture (≥2 cm), EBD failure, and elevated Crohn’s Disease Activity Index, but not the type of scope used for EBD. The prototype SBEs significantly improved the depth of insertion (P=0.03, Wilcoxon’s signed-rank test). Conclusions: In CD patients with small intestinal stenosis, the prototype SBEs with a passive bending mechanism and high force transmission insertion tube did not improve long-term EBD outcome but did improve deep insertability. (Clinical Trial Registration No. UMIN000037102) (Intest Res 2020;18:229-237)
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