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Expression of miR-16 is not a suitable reference for analysis of serum microRNAs in melanoma patients

Journal of Biomedical Science and Engineering 2012年第11期5卷 647-651页

作者： Erica B. Friedman Shulian Shang Nathaniel H. Fleming Eleazar Vega-Saenz de Miera Eva Hernando Yongzhao Shao Iman Osman Department of Dermatology New York University New York USA Division of Biostatistics New York University New York USA interdisciplinary melanoma cooperative group New York University New York USA

Background: The evolving paradigm shift towards the molecular characterization of melanoma has expanded to include studies of microRNA (miRNA) expression. As miR-16 has been utilized as a normalizer in serum-based miRNA studies in several cancers, we evaluated miR-16 expression as a potential reference for normalization of serum miRNA expression in melanoma patients. Methods: 143 primary cutaneous melanoma patients who presented to New York University (NYU) Langone Medical Center for surgical resection of AJCC stage I-III disease were studied. In addition, sera samples from 60 control subjects were utilized including 22 healthy volunteers, 13 rheumatoid arthritis patients, 20 non-melanoma cancer patients (10 renal cell carcinoma and 10 bladder cancer), and 5 Atypical Mole Syndrome patients. The Kruskal-Wallis test (k = 6) or Wilcoxon test (k = 2) with Bonferroni correction was used for analyses of miR-16 expression in melanoma patients compared to various control groups, using raw Ct values directly. The Kruskal-Wallis test was used to compare miR-16 expression across stages of melanoma. The equivalence test for independent samples was used to test the equivalence of miR-16 expression among different groups. Results: No significant differential expression of miR-16 was observed between melanoma patients and healthy volunteers (Wilcoxon test, p = 0.37). However, miR-16 did show a significant difference in expression as it related to stage of melanoma (p = 0.015). Additionally, the equivalence test was unable to confirm equivalent expression of miR-16 in any melanoma versus control group pair. Conclusion: Our data indicate that miR-16 cannot be used as a universal normalizer in sera studies of melanoma patients.

关键词： MicroRNA melanoma Normalization Reference Gene

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Cu/chiral phosphoric acid-catalyzed radical-initiated asymmetric aminosilylation of alkene with hydrosilane

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Science China Chemistry 2019年第11期62卷 1529-1536页

作者： Yang Zeng Xiao-Dong Liu Xian-Qi Guo Qiang-Shuai Gu Zhong-Liang Li Xiao-Yong Chang Xin-Yuan Liu Shenzhen Grubbs Institute Southern University of Science and TechnologyShenzhen 518055China Academy for Advanced interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055Chin

The catalytic radical-initiated asymmetric 1,2-aminosilylation of alkene with a hydrosilane under Cu(I)/CPA cooperative catalysis has been *** method features the use of hydrosilane as the reductive radical precursor,enabling efficient access to skeletally diverse silicon-containing azaheterocycles including pyrrolidine,indoline and isoindoline bearing anα-tertiary stereocenter with high *** key to the success includes the use of Cu(I)/CPA cooperative catalyst system and theβ-silicon effect of the silyl group to stabilize the in situ generated carbocation intermediate.

关键词： asymmetric radical chemistry aminosilylation alkenes Cu/chiral phosphoric acid silyl radical

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Protective effects of a polymethoxy flavonoids-rich Citrus aurantium peel extract on liver fibrosis induced by bile duct ligation in mice

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Asian Pacific Journal of Tropical Medicine 2016年第12期9卷 1135-1141页

作者： Seol-Wa Lim Dong-Ryung Lee Bong-Keun Choi Hong-Suk Kim Seung Hwan Yang Joo-Won Suh Kyung Soo Kim Graduate School of Biomedicine & Health Sciences Catholic University Nutra Pharm Tech interdisciplinary Program of Biomodulation Myongji University Department of Biotechnology Chonnam National University Center for Nutraceutical and Pharmaceutical Materials Myongji University

Objective: To evaluate the possible protective effect of Citrus aurantium peel extract(CAE) against apoptosis in cholestatic liver fibrosis induced by bile duct ligation in mice. Methods: Male ICR mice were divided to 5 groups: 1) Control group(Sham-operated mice), 2) Cholestatic liver injury group induced by bile duct ligation(BDL), 3) BDL mice treated with silymarin(200 mg/kg) for 4 weeks, 4) BDL mice treated with 50 mg/kg CAE for 4 weeks, 5) BDL mice treated with 200 mg/kg CAE for 4 weeks. Mice were sacrificed and liver fibrosis was evaluated by serum and hepatic tissue biochemistry tests and liver histopathological examination. Effects of CAE on inflammation and apoptosis gene regulation were investigated through real-time PCR. CAE effect on lipid metabolism related signaling was determined by western blot analysis. Results: In BDL mice, administration of CAE for 4 weeks markedly attenuated liver fibrosis based on histopathological alteration. Serum and hepatic tissue biochemistry results revealed that CAE(50 and 200 mg/kg) decreased the levels of alanine transaminase, aspartate transaminase, gamma glutamyl transferase, total bilirubin, nitric oxide, and thiobarbituric acid reactive substances. Real-time PCR and western blot analysis showed that CAE regulated inflammation, apoptosis, and lipid metabolism factors increased by BDL. Interleukin family, tumor necrosis factor α, and related apoptosis factors m RNA levels were increased by BDL treatment. However, these increases were suppressed by CAE administration. In addition, CAE effectively increased phosphorylation of AMPactivated protein kinase, nuclear factor E2-related factor 2, and related cytoprotective proteins. Conclusions: CAE can efficiently regulate BDL-induced liver injury with antioxidant, antiinflammatory, and antiapoptotic activities.

关键词： Liver injury Bile duct ligation Cholestasis Citrus aurantium peel extract Hepatic fibrosis

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Customized 3D-printed occluders enabling the reproduction of consistent and stable heart failure in swine models

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Bio-Design and Manufacturing 2021年第4期4卷 833-841页

作者： Han B.Kim Seungman Jung Hyukjin Park Doo S.Sim Munki Kim Sanskrita Das Youngkeun Ahn Myung H.Jeong Jinah Jang Young J.Hong Division of Cardiology Chonnam National University Medical SchoolGwangjuRepublic of Korea School of interdisciplinary Bioscience and Bioengineering Pohang University of Science and TechnologyPohangRepublic of Korea Department of Creative IT Engineering Pohang University of Science and TechnologyPohangRepublic of Korea Department of Mechanical Engineering Pohang University of Science and TechnologyPohangRepublic of Korea

Reproducibility of clinical output is important when investigating therapeutic efficacy in pre-clinical animal *** to its physiological relevance,a swine myocardial infarction(MI)model has been widely used to evaluate the effectiveness of stem cells or tissue-engineered constructs for ischemic heart *** methods are used to induce MI in the swine ***,it is difficult,using these approaches,to obtain a similar level of functional outcomes from a group of animals due to interpersonal variation,leading to increased experimental ***,in order to minimize human intervention,we developed an approach to use a customized occluder that has dimensional similarities with that of the coronary artery of animals in the case of the swine *** carried out angiography to measure the diameter of the middle left anterior descending artery of each individual animal to fabricate the customized occluder using a 3D-printing *** fabricated occluder contained a central hole smaller than that of the targeted middle left anterior descending artery to mimic an atherosclerotic coronary artery that has an approximately 20%blocked ***,the 3D-printed occluder can provide continuous blood flow through the central pore,indicating a high survival rate(88%)of up to 28 days *** method showed the possibility of creating consistent myocardial infarction induction as compared to the conventional representative closed-chest method(50%survival rate),thus highlighting how our method can have a profound effect on accelerating reliable experiments for developing new therapeutic approaches to ischemic heart diseases.

关键词： 3D bioprinting Myocardial infarction Ischemic heart failure Swine model Left anterior descending artery

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