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Melatonin modulates adiponectin expression on murine colitis with sleep deprivation

World Journal of Gastroenterology 2016年第33期22卷 7559-7568页

作者： Tae Kyun Kim Young Sook park Haing-Woon Baik Jin Hyun Jun Eun Kyung Kim Jae woong Sull Ho Joong Sung Jin Woo Choi Sook Hee Chung Myung Chan Gye Ju Yeon Lim Jun Bong Kim Seong Hwan Kim Department of Gastroenterology Eulji University School of MedicineEulji Hospital Department of Biochemistry and Molecular Biology Eulji University School of Medicine Departemnt of Biomedical Laboratory Science Graduate School of Health ScienceEulji University Departemnt of Senior Healthcare BK21 plus ProgramGraduate SchoolEulji University Department of Pathology Eulji University School of Medicine Department of Gastroenterology Ajou University School of Medicine Department of Life Science and Institute of Natural Sciences Hanyang University

AIM To determine adiponectin expression in colonic tissue of murine colitis and systemic cytokine expression after melatonin treatments and sleep *** The following five groups of C57BL/6 mice were used in this study:(1) group Ⅰ,control;(2) group Ⅱ,2% DSS induced colitis for 7 d;(3) group Ⅲ,2% DSS induced colitis and melatonin treatment;(4) group Ⅳ,2% DSS induced colitis with sleep deprivation(SD) using specially designed and modified multiple platform water baths; and(5) group V,2% DSS induced colitis with SD and melatonin treatment. Melatonin(10 mg/kg) or saline was intraperitoneally injected daily to mice for 4 d. The body weight was monitored daily. The degree of colitis was evaluated histologically after sacrificing the mice. Immunohistochemical staining and Western blot analysis was performed using anti-adiponectin antibody. After sampling by intracardiac punctures,levels of serum cytokines were measured by ELISA. RESULTS Sleep deprivation in water bath exacerbated DSS induced colitis and worsened weight loss. Melatonin injection not only alleviated the severity of mucosal injury,but also helped survival during stressful condition. The expression level of adiponectin in mucosa was decreased in colitis,with the lowest level observed in colitis combined with sleep deprivation. Melatonin injection significantly(P < 0.05) recovered the expression of adiponectin. The expression levels of IL-6 and IL-17 were increased in the serum of mice with DSS colitis but decreased after melatonin injection. CONCLUSION This study suggested that melatonin modulated adiponectin expression in colonic tissue and melatonin and adiponectin synergistically potentiated antiinflammatory effects on colitis with sleep deprivation.

关键词： Colitis Melatonin Adiponectin Sleep deprivation

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Magnifying endoscopy for the diagnosis of specialized intestinal metaplasia in short-segment Barrett's esophagus

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World Journal of Gastroenterology 2013年第41期19卷 7089-7096页

作者： Nam Seok Ham Jae Young Jang Sung Woo Ryu Ji Hye Kim Eui Ju park woong Cheul Lee Kwang Yeun Shim Soung Won Jeong Hyun Gun Kim Tae Hee Lee Sung Ran Jeon Jun Hyung Cho Joo Young Cho So Young Jin Ji Sung Lee Institution for Digestive Research Digestive Disease CenterDepartment of Internal MedicineSoonchunhyang University HospitalSeoul 140-743South Korea Department of Pathology Soonchunhyang University HospitalSeoul 140-743South Korea Biostatistical Consulting Unit Soonchunhyang University HospitalSeoul 140-743South Korea

AIM:To determine whether magnified observation of short-segment Barrett’s esophagus(BE)is useful for the detection of specialized intestinal metaplasia(SIM).METHODS:Thirty patients with suspected short-segment BE underwent magnifying endoscopy up to×*** magnified images were analyzed with respect to their pit-patterns,which were simultaneously classified into five epithelial types[Ⅰ(small round),Ⅱ(straight),Ⅲ(long oval),Ⅳ(tubular),Ⅴ(villous)]by Endo’s ***,a 0.5%solution of methylene blue(MB)was sprayed over columnar *** patterns of the magnified image and MB staining were *** were obtained from the regions previously observed by magnifying endoscopy and MB ***:Three of five patients with a typeⅤ(villous)epithelial pattern had SIM,whereas 21 patients with a non-typeⅤepithelial patterns did not have *** sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of pit-patterns in detecting SIM were 100%,91.3%,92.3%,60%and100%,respectively(P=0.004).Three of the 12 patients with positive MB staining had SIM,whereas 14patients with negative MB staining did not have *** sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of MB staining in detecting SIM were 100%,60.9%,65.4%,25%and100%,respectively(P=0.085).The specificity and accuracy of pit-pattern evaluation were significantly superior compared with MB staining for detecting SIM by comparison with the exact McNemar’s test(P=0.0391).CONCLUSION:The magnified observation of a shortsegment BE according to the mucosal pattern and its classification can be predictive of SIM.

关键词： Short-segment Barrett’s esophagus Magnifying endoscopy Methylene blue chromoendoscopy Specialized intestinal metaplasia Dysplasia Esophageal adenocarcinoma Diagnosis

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Second-look endoscopy and factors associated with delayedbleeding after endoscopic submucosal dissection

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World Journal of Gastrointestinal Endoscopy 2016年第3期8卷 173-179页

作者： Su-Jin Kim Cheol-woong Choi Dae-Hwan Kang Hyung-Wook Kim Su-Bum park Department of Internal Medicine Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and TechnologyPusan National University Yangsan HospitalYangsan 626-770South Korea

Endoscopic submucosal dissection(ESD) is a widely used procedure as curative treatment for superficial gastric neoplasms, including early gastric cancer without lymph node metastasis. However, ESD requires advanced endoscopic skill and there is a major concern regarding complications from bleeding. So far, extensive efforts have been made to develop strategies to reduce post-ESD bleeding. Use of proton pump inhibitors and coagulating exposed vessels on the ulcer floor after ESD are strategies known to reduce the risk of delayed bleeding. Second-look endoscopy(SLE) is also carried out to reduce delayed bleeding following ESD in many institutions. However, the incidence of bleeding still remains around 5%, and further measures are needed to reduce delayed bleeding after gastric ESD. Recently, three randomized studies indicated that routine SLE was unnecessary. Although routine SLE may not be recommended for all patients after gastric ESD, SLE might be an important tool for the prevention of the delayed bleeding in selected high-risk patients. Thus, the identification of the risk factors, such as large size of resected specimen and treatment with multiple antiplatelet medications, may help to further guide clinicians in deciding whether to perform SLE. Studies carried out on larger cohorts are necessary to clarify the efficacy of SLE after ESD in the prevention of post-ESD bleeding in potentially high-risk patients.

关键词： Endoscopic submucosal dissection Secondlookendoscopy Early gastric cancer

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潜隐性疾病风险与生命早期砷暴露的关联机制：当前的研究趋势与科学缺口

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环境与职业医学 2016年第4期33卷 414-419页

作者： Kathryn A.Bailey Allan H.Smith Erik J.Tokar Joseph H.Graziano Kyoung-woong Kim Panida Navasumrit Mathuros Ruchirawat Apinya Thiantanawat William A.Suk Rebecca C.Fry 黄馨缘(译) Department of Environmental Sciences and Engineering UNC Gillinss School of Global Public Health Chapel Hill Noah Carolina USA Arsenic Health Effects Research Program School of Public Health University of California Berkeley Berkeley California USA NationalToxicology Program National Institute of Environmental Health Sciences( NIEHS ) National Institutes of Health ( NIH ) Department of Healthand Human Services ( DHHS ) Research Triangle Park North Carolina USA Department of Environmental Health Sciences ColumbiaUuiversity Mailman School of Public Health New York New York USA School of Environmental Science and Engineering Gwangiulnstitute of Science and Technology (GIST) Gwangju Republic of Korea Laboratory of Environmental Toxicology Chulabhorn ResearchInstitute Bangkok Thailand Superfund Research Program NIEHS NIH DHHS Research Triangle Park North Carolina USA 不详

[背景]全球约有数百万人的饮用水中无机砷水平对人体有害,尤其是农村地区和发展中国家。重要生长发育时期的无机砷暴露与多种不良健康效应相关,包括成年时期出现的不良健康效应。探索生命早期的无机砷暴露与后期潜隐性疾病(尤其是癌症)... 详细信息

[背景]全球约有数百万人的饮用水中无机砷水平对人体有害,尤其是农村地区和发展中国家。重要生长发育时期的无机砷暴露与多种不良健康效应相关,包括成年时期出现的不良健康效应。探索生命早期的无机砷暴露与后期潜隐性疾病(尤其是癌症)之间的分子作用机制得到研究者的广泛关注。[目标]本研究汇总了现有研究发现的生命早期无机砷暴露与成年期癌症风险增加背后的分子机制。[讨论]表观遗传重编码影响了基因表达功能改变、肿瘤干细胞形成和免疫调控是生命早期无机砷暴露引起潜在致癌效应的可能机制。[结论]越来越多的证据揭示了生命早期的无机砷暴露与之后癌症的形成有关。未来的研究应通过动物实验验证致病机制的假说,同时进行人群研究将生命早期的无机砷暴露、分子改变和潜在的疾病结局整合起来。

关键词：潜隐性无机砷砷暴露疾病风险关联机制基因表达肿瘤干细胞致癌效应新生儿脐带血表观遗传

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