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Growth inhibition of colon cancer cells by compounds affecting AMPK activity

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World Journal of Gastrointestinal Oncology 2014年第7期6卷 244-252页

作者： Michael A Lea Jacob Pourat Rupali Patel Charles desBordes Department of Biochemistry and Molecular Biology New Jersey Medical School Rutgers University Newark NJ 07103 United States Department of Biology Medgar Evers Col-lege-City University of New York Brooklyn NY 11225 United States

AIM:To determine if other molecules reported to modulate AMP-dependent protein kinase(AMPK)activ-ity would have effects resembling those of metformin and phenformin on colon cancer cell proliferation and ***:Studies were performed with four hu-man colon cancer cell lines,Caco-2,HCT116,HT29 and *** compounds that were studied included A-769662,5-aminoimidazole-4-carboxamide-1-ribofu-ranoside,butyrate,(-)-epigallocatechin gallate(EGCG),KU-55933,quercetin,resveratrol and *** parameters that were measured were cell proliferation and viability,glucose uptake,lactate production and acidification of the incubation ***:Investigations with several molecules that have been reported to be associated with AMPK activa-tion(A-769662,5-aminoimidazole-4-carboxamide-1-b-D-ribofuranoside,EGCG,KU-55933,quercetin,resve-ratrol and salicylates)or AMPK inhibition(compound C)failed to reveal increased medium acidification and increased glucose uptake in colon cancer cells as previ-ously established with metformin and *** only exception was 5-aminosalicylic acid with which there were apparently lower glucose levels in the me-dium after incubation for 72 *** study in the absence of cells revealed that the effect was an artifact due to inhibition of the enzyme-linked glucose *** compounds were studied at concentrations that inhibited cell ***:It was concluded that treatment with several agents that can affect AMPK activity resulted in the inhibition of the proliferation of colon cancer cells under conditions in which glucose metabolism is not enhanced,in contrast to the effect of biguanides.

关键词：结肠癌房间增长安培依赖者蛋白质 kinase 葡萄糖新陈代谢

Effects of sleeve gastrectomy plus trunk vagotomy compared with sleeve gastrectomy on glucose metabolism in diabetic rats

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World Journal of Gastroenterology 2017年第18期23卷 3269-3278页

作者： Teng Liu Ming-Wei Zhong Yi Liu Xin Huang Yu-Gang Cheng Ke-Xin Wang Shao-Zhuang Liu San-Yuan Hu Department of General Surgery Qilu Hospital of Shandong University Health and Family Planning Commission of Shandong Provincial Medical Guidance Center

AIM To investigate the effects of sleeve gastrectomy plus trunk vagotomy(SGTV) compared with sleeve gastrectomy(SG) in a diabetic rat *** SGTV, SG, TV and Sham operations were performed on rats with diabetes induced by high-fat diet and streptozotocin. Body weight, food intake, oral glucose tolerance test, homeostasis model assessment of insulin resistance(HOMA-IR), hepatic insulin signaling(IR, IRS1, IRS2, PI3 K and AKT), oral glucose stimulatedinsulin secretion, GLP-1 and ghrelin were compared at various postoperative *** Both SG and SGTV resulted in better glucose tolerance, lower HOMA-IR, up-regulated hepatic insulin signaling, higher levels of oral glucose-stimulated insulin secretion, higher postprandial GLP-1 and lower fasting ghrelin levels than the TV and Sham groups. No significant differences were observed between the SG and SGTV groups. In addition, no significant differences were found between the TV and Sham groups in terms of glucose tolerance, HOMA-IR, hepatic insulin signaling, oral glucose-stimulated insulin secretion, postprandial GLP-1 and fasting ghrelin levels. No differences in body weight and food intake were noted between the four *** SGTV is feasible for diabetes control and is independent of weight loss. However, SGTV did not result in a better improvement in diabetes than SG alone.

关键词：袖子 gastrectomy 箱子 vagotomy 葡萄糖新陈代谢 GLP-1 Ghrelin

Serum levels of undercarboxylated osteocalcin are related to cardiovascular risk factors in patients with type 2 diabetes mellitus and healthy subjects

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World Journal of Diabetes 2017年第1期8卷 11-17页

作者： Sergio Sanchez-Enriquez Isabel Thalia Ballesteros-Gonzalez JoséRafael Villafán-Bernal Sara Pascoe-Gonzalez Edgar Alfonso Rivera-Leon Blanca Estela Bastidas-Ramirez Jorge David Rivas-Carrillo Juan Luis Alcala-Zermeno Juan Armendariz-Borunda Iris Monserrat Llamas-Covarrubias Abraham Zepeda-Moreno Biochemistry Laboratory Molecular Biology and Genomics Department University Center of Health Sciences University of Guadalajara Academic Group UDG-CA-533 Multidisciplinary Study of Chronic and Degenerative Diseases Molecular Biology and Genomics Department University Center of Health Sciences University of Guadalajara Departamento de Jóvenes Investigadores y Cátedras del Consejo Nacional de Ciencia y Tecnología (CONACYT) Departamento de Cirugía Centro Universitario de Ciencias de la Salud Universidad Autónoma de Aguascalientes Physiology Department University Center of Health Sciences University of Guadalajara Institute of Degenerative Chronic Diseases Molecular Biology and Genomics Department University Center of Health Sciences University of Guadalajara Molecular Biology and Genomics Department University Center of Health SciencesUniversity of Guadalajara Institute of Cancer Research in Child and Adolescent University Center of Health Sciences University of Guadalajara

AIM To determine a potential relationship between serum undercarboxylated(uc OC) concentration and cardiovascular risk factors in type 2 diabetes(T2D) patients and healthy subjects(HS).METHODS A cross-sectional study was conducted on 140 subjects classified into two groups, 70 with T2D and 70 HS. Medical history and physical examination with anthropometric measurements were obtained from all subjects. Body fat percentage was determined by bioelectrical impendency analysis. Serum uc OC concentration was determined by enzyme immunoassay,while serum levels of insulin and hsC RP were obtained using high sensitivity enzyme-linked immunosorbent assay. Insulin resistance was determined using the homeostasis model assessment-IR. Lipid profile [triglycerides,total cholesterol(TC), high-density lipoproteins(HDL-c),low density lipoproteins(LDL-c), very low-density lipoproteins] was determined by spectrophotometry and standard formulas when applicable. RESULTS The T2D patient group showed significantly higher values of waist circumference, waist-to-hip ratio, systolic blood pressure(SBP), diastolic blood pressure(DBP),current smoking, and alcohol use when compared to the HS group(P < 0.05). We observed a significantly lower serum ucO C concentration in T2D than in HS(1.5 ± 1.4vs 2.3 ± 1.8, P < 0.05). In the whole study population,ucO C concentration was inversely correlated with body mass index(BMI)(r =-0.236, P < 0.05), fasting plasma glucose(r =-0.283, P < 0.01) and HDL-c(r =-0.255,P < 0.05); and positively correlated with LDL-c/HDL-c ratio(r = 0.306, P < 0.05) and TC/HDL-c ratio(r =0.284, P < 0.05). In the T2D group, serum uc OC concentration was inversely correlated with BMI(r =-0.310, P < 0.05) and body-fat percentage(r =-0.311,P < 0.05), and positively correlated with DBP(r = 0.450,P < 0.01). In HS group a positive correlation between serum levels of uc OC and SBP(r = 0.277, P < 0.05)was observed. CONCLUSION Serum uc OC is a potential marker for cardiovascular risk in Mex

关键词：骨头 Osteocalcin 葡萄糖新陈代谢糖尿病心血管的风险

Mechanisms underlying ^(18)F-fluorodeoxyglucose accumulation in colorectal cancer

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World Journal of Radiology 2016年第11期8卷 880-886页

作者： Kenji Kawada Masayoshi Iwamoto Yoshiharu Sakai Department of Surgery Graduate School of MedicineKyoto University

Positron emission tomography(PET) with ^(18)F-fluorodeoxyglucose(FDG) is a diagnostic tool to evaluate metabolic activity by measuring accumulation of FDG, an analogue of glucose, and has been widely used for detecting small tumors, monitoring treatment response and predicting patients' prognosis in a variety of cancers. However, the molecular mechanism of FDG accumulation into tumors remains to be investigated. It is well-known that most cancers are metabolically active with elevated glucose metabolism, a phenomenon known as the Warburg effect. The underlying mechanisms for elevated glucose metabolism in cancer tissues are complex. Recent reports have indicated the potential of FDG-PET/CT scans in predicting mutational status(e.g., KRAS gene mutation) of colorectal cancer(CRC), which suggests that FDG-PET/CT scans may play a key role in determining therapeutic strategies by non-invasively predicting treatment response to anti-epidermal growth factor receptor(EGFR) therapy. In this review, we summarize the current findings investigating the molecular mechanism of ^(18)F-FDG accumulation in CRC.

关键词： 18 F-fluorodeoxyglucose-positron 排放断层摄影术 Colorectal 癌症葡萄糖新陈代谢 Mutational 地位 KRAS