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Pan JL, Gao J, Hou JH, Hu DZ, Li L. Interaction Between Environmental Risk Factors and Catechol-O-Methyltransferase (COMT) and X-Ray Repair Cross-Complementing Protein 1 (XRCC1) Gene Polymorphisms in Risk of Lung Cancer Among Non-Smoking Chinese Women: A Case-Control Study. Med Sci Monit 2018; 24:5689-5697. [PMID: 30109864 PMCID: PMC6106617 DOI: 10.12659/msm.908240] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Backgrpound Various studies have highlighted the link between polymorphisms in the XRCC1 gene (encoding X-ray repair cross-complementing group 1) with the incidence of decreased DNA repair capacity and an increased predisposition to cancer. Catechol-O-methyltransferase (COMT) plays a crucial role in estrogen-induced cancers. In the present study was analyzed the potential influence of XRCC1 and COMT gene polymorphisms as predisposing factors from a lung cancer perspective, in addition to conducting an investigation into their interaction with environmental risk factors in relation to lung cancer among non-smoking Chinese women. Material/Methods The XRCC1 gene T-77C, Arg194Trp, Arg280His, Arg399Gln, COMT gene 186C>T, and Val158Met mutations were evaluated in peripheral blood collected from 261 non-smoking female patients diagnosed with primary lung cancer and 265 female patients with benign lung disease. Result The results obtained from this study demonstrated that XRCC1–77TC + CC, XRCC1 399Gln/Gln, COMT 186CT + TT, COMT 158Val/Met genotypes, type of occupation, cooking-oil fumes, and soot exposures were all independent risk factors involved with the occurrence of lung cancer among non-smoking women. Moreover, interactions between environmental exposure factors as well as XRCC1 and COMT gene polymorphisms were determined to play significant contributory roles regarding susceptibility of non-smoking females to lung cancer. Conclusions Taken together, T-77C and Arg399Gln polymorphisms of the XRCC1 gene, as well as the 186C>T and Val158Met polymorphisms of the COMT gene, increased the risk of lung cancer in non-smoking women, with the factors of occupation type, cooking-oil fumes, and soot exposures representing key contributing factors.
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Affiliation(s)
- Jian-Liang Pan
- Department of Respiratory and Critical Care Medicine, The Second People's Hospital of Weifang, Weifang, Shandong, China (mainland)
| | - Jin Gao
- Department of Basic Medicine, Heze Medical College, Heze, Shandong, China (mainland)
| | - Jian-Hua Hou
- Department of Respiratory and Critical Care Medicine, The Second People's Hospital of Weifang, Weifang, Shandong, China (mainland)
| | - De-Zhong Hu
- Department of Respiratory and Critical Care Medicine, The Second People's Hospital of Weifang, Weifang, Shandong, China (mainland)
| | - Lin Li
- Department of Cardiothoracic Surgery, Heze Municipal Hospital of Shandong Province, Heze, Shandong, China (mainland)
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Bozek T, Blazekovic A, Perkovic MN, Jercic KG, Sustar A, Smircic-Duvnjak L, Outeiro TF, Pivac N, Borovecki F. The influence of dopamine-beta-hydroxylase and catechol O-methyltransferase gene polymorphism on the efficacy of insulin detemir therapy in patients with type 2 diabetes mellitus. Diabetol Metab Syndr 2017; 9:97. [PMID: 29225702 PMCID: PMC5716004 DOI: 10.1186/s13098-017-0295-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/22/2017] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Type II diabetes is an important health problem with a complex connection to obesity, leading to a broad range of cardiovascular complications. Insulin therapy often results in weight gain and does not always ensure adequate glycemic control. However, previous studies reported that insulin detemir is an efficient long-acting insulin with a weight sparing effect. The aim of this study was to determine the association of catechol O-methyltransferase (COMT) Val108/158Met and dopamine-beta-hydroxylase (DBH) 1021C/T polymorphisms with the effectiveness of insulin detemir in achieving glucose control and body weight control. Participants and methods: This 52-week observational study included 185 patients with inadequate glycemic control treated with premix insulin analogues, which were replaced with insulin aspart and insulin detemir, and 156 healthy controls. After DNA isolation from blood samples, genotyping of DBH-1021C/T polymorphism (rs1611115) and COMT Val108/158Met polymorphism (rs4680) was performed. RESULTS Our results confirmed that insulin detemir did not lead to weight gain. The most significant finding was that A carriers (the combined AG and AA genotype) of the COMT Val108/158Met achieved significantly better hemoglobin A1c (HbA1c) values compared to patients carrying GG genotype. No association between DBH-1021C/T genotypes and weight and/or glucose control was detected in diabetes patients or in healthy control subjects. CONCLUSIONS This study showed that the presence of one or two A allele of the COMT Val108/158Met was associated with improved glycemic response, and with a better response to insulin detemir therapy in patients with type II diabetes, separating them as best candidates for detemir therapy.
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Affiliation(s)
- Tomislav Bozek
- Vuk Vrhovac University Clinic, Merkur University Hospital, Zagreb, Croatia
| | - Antonela Blazekovic
- Department for Functional Genomics, Center for Translational and Clinical Research, University of Zagreb School of Medicine, University Hospital Center Zagreb, Šalata 2, Zagreb, Croatia
| | | | - Kristina Gotovac Jercic
- Department for Functional Genomics, Center for Translational and Clinical Research, University of Zagreb School of Medicine, University Hospital Center Zagreb, Šalata 2, Zagreb, Croatia
| | - Aleksandra Sustar
- Department of Cardiology, University Hospital Center Rijeka, Rijeka, Croatia
| | | | - Tiago F. Outeiro
- Department of Experimental Neurodegeneration, Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- Max Planck Institute for Experimental Medicine, Göttingen, Germany
| | - Nela Pivac
- Division of Molecular Medicine, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Fran Borovecki
- Department for Functional Genomics, Center for Translational and Clinical Research, University of Zagreb School of Medicine, University Hospital Center Zagreb, Šalata 2, Zagreb, Croatia
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Ueki N, Kanasaki K, Kanasaki M, Takeda S, Koya D. Catechol-O-Methyltransferase Deficiency Leads to Hypersensitivity of the Pressor Response Against Angiotensin II. Hypertension 2017; 69:1156-1164. [DOI: 10.1161/hypertensionaha.117.09247] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/01/2017] [Accepted: 04/04/2017] [Indexed: 11/16/2022]
Abstract
Catechol-O-methyltransferase (COMT) metabolizes 2-hydroxyestradiol into 2-methoxyestradiol (2-ME); COMT deficiency has shown to be associated with hypertension in men and preeclampsia, the disease associated with hypersensitivity of pressor response against angiotensin II (Ang II). Here, we found that COMT deficiency could explain the hypersensitivity of pressor response against Ang II in mice because of the lack of 2-ME–dependent suppression of angiotensin II receptor type 1 (AT1R). Male C57BL/6 mice were subjected to COMT inhibitor (COMTi: 25 mg/kg per day) or oil (control) for 4 weeks, with or without low-dose Ang II infusion (ANGII: 70 ng/kg per minute) for the last 3 weeks. The Ang II–infused mice were treated with 2-ME (10 ng/d) or vehicle for the last 1 week. We obtained the following experimental groups: control, ANGII, COMTi, COMTi+ANGII, and COMTi+ANGII+2-ME. We performed similar experiments using the in vivo administration of small interfering RNA of COMT instead of COMTi. Neither ANGII nor COMTi exhibited significant alterations in systolic blood pressure. Compared with ANGII or COMTi, COMTi+ANGII displayed significantly higher systolic blood pressure, albuminuria, and glomerular endotheliosis; 2-ME normalized such alterations. Similar phenotypes were observed in COMT small interfering RNA–treated mice. In the aorta of COMT-deficient mice, AT1R expression was increased; 2-ME suppressed AT1R expression. The 2-ME exhibited peroxisome proliferator–activated receptor γ agonistic activity in vitro and ex vivo plasma from pregnant female mice as well. In vitro, 2-ME suppressed both basal and Ang II–induced AT1R levels in a peroxisome proliferator–activated receptor γ–dependent manner. The 2-ME is relevant to combat COMT deficiency–associated hypertensive disorders via suppression of AT1R by its peroxisome proliferator–activated receptor γ activity.
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Affiliation(s)
- Norikazu Ueki
- From the Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan (N.U., S.T.); and Department of Diabetology and Endocrinology (N.U., K.K., M.K., D.K.) and Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (K.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
| | - Keizo Kanasaki
- From the Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan (N.U., S.T.); and Department of Diabetology and Endocrinology (N.U., K.K., M.K., D.K.) and Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (K.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
| | - Megumi Kanasaki
- From the Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan (N.U., S.T.); and Department of Diabetology and Endocrinology (N.U., K.K., M.K., D.K.) and Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (K.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
| | - Satoru Takeda
- From the Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan (N.U., S.T.); and Department of Diabetology and Endocrinology (N.U., K.K., M.K., D.K.) and Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (K.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
| | - Daisuke Koya
- From the Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan (N.U., S.T.); and Department of Diabetology and Endocrinology (N.U., K.K., M.K., D.K.) and Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (K.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
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Oh H, Coburn SB, Matthews CE, Falk RT, LeBlanc ES, Wactawski-Wende J, Sampson J, Pfeiffer RM, Brinton LA, Wentzensen N, Anderson GL, Manson JE, Chen C, Zaslavsky O, Xu X, Trabert B. Anthropometric measures and serum estrogen metabolism in postmenopausal women: the Women's Health Initiative Observational Study. Breast Cancer Res 2017; 19:28. [PMID: 28284224 PMCID: PMC5346241 DOI: 10.1186/s13058-017-0810-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Accepted: 01/28/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Several anthropometric measures have been associated with hormone-related cancers. However, it is unknown whether estrogen metabolism plays an important role in these relationships. We examined whether measured current body mass index (BMI), waist-to-hip ratio (WHR), height, and self-reported BMI at age 18 years were associated with serum estrogens/estrogen metabolites using baseline, cross-sectional data from 1835 postmenopausal women enrolled in the Women's Health Initiative Observational Study. METHODS Fifteen estrogens/estrogen metabolites were quantified using liquid chromatography-tandem mass spectrometry. Geometric means (GMs) of estrogens/estrogen metabolites (in picomoles per liter) were estimated using inverse probability weighted linear regression, adjusting for potential confounders and stratified on menopausal hormone therapy (MHT) use. RESULTS Among never or former MHT users, current BMI (≥30 vs. <25 kg/m2) was positively associated with parent estrogens (multivariable adjusted GM 432 vs. 239 pmol/L for estrone, 74 vs. 46 pmol/L for estradiol; p-trend < 0.001 for both) and all of the 2-, 4-, and 16-pathway estrogen metabolites evaluated (all p-trend ≤ 0.02). After additional adjustment for estradiol, unconjugated methylated 2-catechols were inversely associated (e.g., 2-methoxyestrone multivariable GM 9.3 vs. 12.0 pmol/L; p-trend < 0.001). Among current MHT users, current BMI was not associated with parent estrogens but was inversely associated with methylated catechols (e.g., 2-methoxyestrone multivariable GM 216 vs. 280 pmol/L; p-trend = 0.008). Similar patterns of association were found with WHR; however, the associations were not independent of BMI. Height and BMI at age 18 years were not associated with postmenopausal estrogens/estrogen metabolite levels. CONCLUSIONS Our data suggest that postmenopausal BMI is associated with increased circulating levels of parent estrogens and reduced methylation of catechol estrogen metabolites, the estrogen metabolism patterns that have previously been associated with higher breast cancer risk.
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Affiliation(s)
- Hannah Oh
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA.
| | - Sally B Coburn
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Charles E Matthews
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Roni T Falk
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Erin S LeBlanc
- Center for Health Research, Kaiser Permanente NW, Portland, OR, USA
| | - Jean Wactawski-Wende
- Department of Epidemiology and Environmental Health, University at Buffalo, Buffalo, NY, USA
| | - Joshua Sampson
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Ruth M Pfeiffer
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Louise A Brinton
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
| | - Garnet L Anderson
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - JoAnn E Manson
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Chu Chen
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Oleg Zaslavsky
- School of Nursing, University of Washington, Seattle, WA, USA
| | - Xia Xu
- Cancer Research Technology Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Britton Trabert
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, 6E332, Bethesda, MD, 20892, USA
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Liu JX, Luo RC, Li R, Li X, Guo YW, Ding DP, Chen YZ. Lack of associations of the COMT Val158Met polymorphism with risk of endometrial and ovarian cancer: a pooled analysis of case-control studies. Asian Pac J Cancer Prev 2017; 15:6181-6. [PMID: 25124595 DOI: 10.7314/apjcp.2014.15.15.6181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
This meta-analysis was conducted to examine whether the genotype status of Val158Met polymorphism in catechol-O-methyltransferase (COMT) is associated with endometrial and ovarian cancer risk. Eligible studies were identified by searching several databases for relevant reports published before January 1, 2014. Pooled odds ratios (ORs) were appropriately derived from fixed-effects or random-effects models. In total, 15 studies (1,293 cases and 2,647 controls for ovarian cancer and 2,174 cases and 2,699 controls for endometrial cancer) were included in the present meta-analysis. When all studies were pooled into the meta-analysis, there was no evidence for significant association between COMT Val158Met polymorphism and ovarian cancer risk (Val/Met versus Val/Val: OR=0.91, 95% CI=0.76-1.08; Met/Met versus Val/Val: OR=0.90, 95% CI=0.73-1.10; dominant model: OR=0.90, 95% CI=0.77-1.06; recessive model: OR=0.95, 95% CI=0.80-1.13). Similarly, no associations were found in all comparisons for endometrial cancer (Val/Met versus Val/Val: OR 0.97, 95% CI=0.77-1.21; Met/Met versus Val/Val: OR=1.02, 95% CI=0.73-1.42; dominant model: OR=0.98, 95% CI=0.77-1.25; recessive model: OR=1.02, 95% CI=0.87-1.20). In the subgroup analyses by source of control and ethnicity, no significant associations were found in any subgroup of population. This meta-analysis strongly suggests that COMT Val158Met polymorphism is not associated with increased endometrial and ovarian cancer risk.
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Affiliation(s)
- Jin-Xin Liu
- Department of Oncology, Longgang District Central Hospital of ShenZhen, ShenZhen, China E-mail :
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Stanfill AG, Conley Y, Cashion A, Thompson C, Homayouni R, Cowan P, Hathaway D. Neurogenetic and Neuroimaging Evidence for a Conceptual Model of Dopaminergic Contributions to Obesity. Biol Res Nurs 2015; 17:413-21. [PMID: 25576324 DOI: 10.1177/1099800414565170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
As the incidence of obesity continues to rise, clinicians and researchers alike are seeking explanations for why some people become obese while others do not. While caloric intake and physical activity most certainly play a role, some individuals continue to gain weight despite careful attention to these factors. Increasing evidence suggests that genetics may play a role, with one potential explanation being genetic variability in genes within the neurotransmitter dopamine pathway. This variability can lead to a disordered experience with the rewarding properties of food. This review of literature examines the extant knowledge about the relationship between obesity and the dopaminergic reward pathways in the brain, with particularly strong evidence provided from neuroimaging and neurogenetic data. Pubmed, Google Scholar, and Cumulative Index to Nursing and Allied Health Literature searches were conducted with the search terms dopamine, obesity, weight gain, food addiction, brain regions relevant to the mesocortical and mesolimbic (reward) pathways, and relevant dopaminergic genes and receptors. These terms returned over 200 articles. Other than a few sentinel articles, articles were published between 1993 and 2013. These data suggest a conceptual model for obesity that emphasizes dopaminergic genetic contributions as well as more traditional risk factors for obesity, such as demographics (age, race, and gender), physical activity, diet, and medications. A greater understanding of variables contributing to weight gain and obesity is imperative for effective clinical treatment.
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Affiliation(s)
- Ansley Grimes Stanfill
- University of Pittsburgh, School of Nursing, Pittsburgh, PA, USA University of Tennessee Health Science Center, Memphis, TN, USA
| | | | - Ann Cashion
- National Institutes of Health, Bethesda, MD, USA
| | | | | | - Patricia Cowan
- University of Tennessee Health Science Center, Memphis, TN, USA
| | - Donna Hathaway
- University of Tennessee Health Science Center, Memphis, TN, USA
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7
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Passarelli MN, Newcomb PA, Makar KW, Burnett-Hartman AN, Phipps AI, David SP, Hsu L, Harrison TA, Hutter CM, Duggan DJ, White E, Chan AT, Peters U. No association between germline variation in catechol-O-methyltransferase and colorectal cancer survival in postmenopausal women. Menopause 2014; 21:415-20. [PMID: 23880798 PMCID: PMC3865220 DOI: 10.1097/gme.0b013e31829e498d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Sex steroid hormones play a role in colorectal cancer (CRC) development, but little is known about their influence on tumor progression and metastasis. Because catechol-O-methyltransferase (COMT; 22q11.21) activity is an important component of estrogen-mediated carcinogenesis, we hypothesized that germline variation in COMT may be associated with CRC survival. METHODS We identified 10 single nucleotide polymorphisms that tagged variation across two isoforms of COMT in 2,458 women with CRC from the Nurses' Health Study, Postmenopausal Hormones Supplementary Study to the Colon Cancer Family Registry, VITamins And Lifestyle Study, and Women's Health Initiative. All four studies participated in the Genetics and Epidemiology of Colorectal Cancer Consortium. RESULTS During a median follow-up of 7 years across all studies, there were 799 deaths, including 566 deaths from CRC. Based on multiple comparisons, no associations between single nucleotide polymorphisms and CRC-specific or overall survival reached statistical significance, including the well-characterized Val108/158Met polymorphism (rs4680; CRC-specific survival: hazard ratio per minor allele, 1.04; 95% CI, 0.92-1.17; overall survival: hazard ratio per minor allele, 1.01; 95% CI, 0.90-1.14). CONCLUSIONS In this large study of women with CRC, we find no evidence that common inherited variation in COMT is associated with survival time after diagnosis.
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Affiliation(s)
- Michael N. Passarelli
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Epidemiology, University of Washington School of Public Health, Seattle, WA
| | - Polly A. Newcomb
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Epidemiology, University of Washington School of Public Health, Seattle, WA
| | - Karen W. Makar
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | | | - Amanda I. Phipps
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Sean P. David
- Division of General Medical Disciplines, Stanford University School of Medicine, Stanford, CA
- SRI International, Menlo Park, CA
| | - Li Hsu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Biostatistics, University of Washington School of Public Health, Seattle, WA
| | - Tabitha A. Harrison
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Carolyn M. Hutter
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - David J. Duggan
- Integrated Cancer Genomics Division, Translational Genomics Research Institute, Phoenix, AZ
| | - Emily White
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Epidemiology, University of Washington School of Public Health, Seattle, WA
| | - Andrew T. Chan
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | - Ulrike Peters
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Epidemiology, University of Washington School of Public Health, Seattle, WA
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Significant association of CHRNB3 variants with nicotine dependence in multiple ethnic populations. Mol Psychiatry 2013; 18:1149-51. [PMID: 23319001 DOI: 10.1038/mp.2012.190] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Lu C, Zhu W, Shen CL, Gao W. Green tea polyphenols reduce body weight in rats by modulating obesity-related genes. PLoS One 2012; 7:e38332. [PMID: 22715380 PMCID: PMC3371013 DOI: 10.1371/journal.pone.0038332] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Accepted: 05/03/2012] [Indexed: 12/16/2022] Open
Abstract
Beneficial effects of green tea polyphenols (GTP) against obesity have been reported, however, the mechanism of this protection is not clear. Therefore, the objective of this study was to identify GTP-targeted genes in obesity using the high-fat-diet-induced obese rat model. A total of three groups (n = 12/group) of Sprague Dawley (SD) female rats were tested, including the control group (rats fed with low-fat diet), the HF group (rats fed with high-fat diet), and the HF+GTP group (rats fed with high-fat diet and GTP in drinking water). The HF group increased body weight as compared to the control group. Supplementation of GTP in the drinking water in the HF+GTP group reduced body weight as compared to the HF group. RNA from liver samples was extracted for gene expression analysis. A total of eighty-four genes related to obesity were analyzed using PCR array. Compared to the rats in the control group, the rats in the HF group had the expression levels of 12 genes with significant changes, including 3 orexigenic genes (Agrp, Ghrl, and Nr3c1); 7 anorectic genes (Apoa4, Cntf, Ghr, IL-1β, Ins1, Lepr, and Sort); and 2 genes that relate to energy expenditure (Adcyap1r1 and Adrb1). Intriguingly, the HF+GTP group restored the expression levels of these genes in the high-fat-induced obese rats. The protein expression levels of IL-1β and IL-6 in the serum samples from the control, HF, and HF+GTP groups confirmed the results of gene expression. Furthermore, the protein expression levels of superoxide dismutase-1 (SOD1) and catechol-O-methyltransferase (COMT) also showed GTP-regulated protective changes in this obese rat model. Collectively, this study revealed the beneficial effects of GTP on body weight via regulating obesity-related genes, anti-inflammation, anti-oxidant capacity, and estrogen-related actions in high-fat-induced obese rats.
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Affiliation(s)
- Chuanwen Lu
- Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Texas Tech University Health Sciences Center, Lubbock, Texas, United States of America
| | - Wenbin Zhu
- Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Texas Tech University Health Sciences Center, Lubbock, Texas, United States of America
| | - Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, Texas, United States of America
| | - Weimin Gao
- Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Texas Tech University Health Sciences Center, Lubbock, Texas, United States of America
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Schendzielorz N, Männistö PT, Karayiorgou M, Gogos JA, Raasmaja A. A transient inhibition and permanent lack of catechol-O-methyltransferase have minor effects on feeding pattern of female rodents. Basic Clin Pharmacol Toxicol 2011; 110:307-13. [PMID: 21851556 DOI: 10.1111/j.1742-7843.2011.00783.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Abnormal feeding behaviours have long been linked to disruptions in brain dopaminergic activity. Dopamine is metabolized, amongst others, by catechol-O-methyltransferase (COMT). Normally, COMT only plays a subordinate role in dopamine metabolism. However, changes in COMT activity, especially in the prefrontal cortex, become more important during events that evoke dopamine release. The current study investigated the effect of acute COMT inhibition on feeding in Wistar rats and C57BL/6 mice using a selective, brain penetrating COMT inhibitor (OR-1139). Furthermore, the effect of a long-term lack of COMT on feeding behaviour was studied in COMT-deficient (COMT -/-) mice. Apart from following the gross feeding behaviour of fasted rats and mice, the first 4 hr of re-feeding were recorded with a video camera to allow a more detailed analysis of feeding microstructure. In the acute study, rats and mice received a single injection of OR-1139 (3, 10 or 30 mg/kg), just before the experiment. We found that rats and mice receiving OR-1139 had fewer very short meals but more long meals than the controls. Treated mice even ate more frequently than the controls, but other feeding parameters remained unchanged. Conversely, COMT -/- mice displayed an increased latency to initiate the first meal and spent less total time eating than wild-type mice. In conclusion, although decreased/lack of COMT activity did not robustly alter feeding behaviour of female rodents, we observed some alterations in the microstructure of feeding. However, these minor changes were highly dependent on the extent and fashion in which COMT was manipulated.
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Affiliation(s)
- Nadia Schendzielorz
- Division of Pharmacology and Toxicology, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.
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Kring SII, Werge T, Holst C, Toubro S, Astrup A, Hansen T, Pedersen O, Sørensen TIA. Polymorphisms of serotonin receptor 2A and 2C genes and COMT in relation to obesity and type 2 diabetes. PLoS One 2009; 4:e6696. [PMID: 19690620 PMCID: PMC2724686 DOI: 10.1371/journal.pone.0006696] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Accepted: 07/13/2009] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Candidate genes of psychological importance include 5HT2A, 5HT2C, and COMT, implicated in the serotonin, noradrenaline and dopamine pathways, which also may be involved in regulation of energy balance. We investigated the associations of single nucleotide polymorphisms (SNPs) of these genes with obesity and metabolic traits. METHODOLOGY/PRINCIPAL FINDINGS In a population of 166 200 young men examined at the draft boards, obese men (n = 726, BMI> or =31.0 kg/m(2)) and a randomly selected group (n = 831) were re-examined at two surveys at mean ages 46 and 49 years (S-46, S-49). Anthropometric, physiological and biochemical measures were available. Logistic regression analyses were used to assess age-adjusted odds ratios. No significant associations were observed of 5HT2A rs6311, 5HT2C rs3813929 and COMT rs4680 with obesity, except that COMT rs4680 GG-genotype was associated with fat-BMI (OR = 1.08, CI = 1.01-1.16). The SNPs were associated with a number of physiological variables; most importantly 5HT2C rs3813929 T-allele was associated with glucose (OR = 4.56, CI = 1.13-18.4) and acute insulin response (OR = 0.65, CI = 0.44-0.94) in S-49. COMT rs4680 GG-genotype was associated with glucose (OR = 1.04, CI = 1.00-1.09). Except for an association between 5HT2A rs6311 and total-cholesterol at both surveys, significant in S-46 (OR = 2.66, CI = 1.11-6.40), no significant associations were observed for the other phenotypes. Significant associations were obtained when combined genotype of 5HT2C rs3813929 and COMT rs4680 were examined in relation to BMI (OR = 1.12, CI = 1.03-1.21), fat-BMI (OR = 1.22, CI = 1.08-1.38), waist (OR = 1.13, CI = 1.04-1.22), and cholesterol (OR = 5.60, CI = 0.99-31.4). Analyses of impaired glucose tolerance (IGT) and type 2 diabetes (T2D) revealed, a 12.3% increased frequency of 5HT2C rs3813929 T-allele and an 11.6% increased frequency of COMT rs4680 GG-genotype in individuals with IGT or T2D (chi(2), p = 0.05 and p = 0.06, respectively). Examination of the combined genotypes of 5HT2C and COMT showed a 34.0% increased frequency of IGT or T2D (chi(2), p = 0.01). CONCLUSIONS The findings lend further support to the involvement of serotonin, noradrenaline and dopamine pathways on obesity and glucose homeostasis, in particular when combined genotype associations are explored.
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Affiliation(s)
- Sofia I I Kring
- Institute of Preventive Medicine, Copenhagen University Hospital, Centre for Health and Society, Copenhagen, Denmark.
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Azzato EM, Morton LM, Bergen AW, Wang SS, Chatterjee N, Kvale P, Yeager M, Hayes RB, Chanock SJ, Caporaso NE. SLC6A3 and body mass index in the Prostate, Lung, Colorectal and Ovarian Cancer Screening Trial. BMC MEDICAL GENETICS 2009; 10:9. [PMID: 19183461 PMCID: PMC2640369 DOI: 10.1186/1471-2350-10-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Accepted: 01/30/2009] [Indexed: 11/29/2022]
Abstract
Background To investigate the contribution of the dopamine transporter to dopaminergic reward-related behaviors and anthropometry, we evaluated associations between polymorphisms at the dopamine transporter gene(SLC6A3) and body mass index (BMI), among participants in the Prostate, Lung, Colorectal and Ovarian (PLCO) Cancer Screening Trial. Methods Four polymorphisms (rs6350, rs6413429, rs6347 and the 3' variable number of tandem repeat (3' VNTR) polymorphism) at the SLC6A3 gene were genotyped in 2,364 participants selected from the screening arm of PLCO randomly within strata of sex, age and smoking history. Height and weight at ages 20 and 50 years and baseline were assessed by questionnaire. BMI was calculated and categorized as underweight, normal, overweight and obese (<18.5, 18.5–24.9, 25.0–29.9, or ≥ 30 kg/m2, respectively). Odds ratios (ORs) and 95% confidence intervals (CIs) of SLC6A3 genotypes and haplotypes were computed using conditional logistic regression. Results Compared with individuals having a normal BMI, obese individuals at the time of the baseline study questionnaire were less likely to possess the 3' VNTR variant allele with 9 copies of the repeated sequence in a dose-dependent model (** is referent; OR*9 = 0.80, OR99 = 0.47, ptrend = 0.005). Compared with individuals having a normal BMI at age 50, overweight individuals (A-C-G-* is referent; ORA-C-G-9 = 0.80, 95% CI 0.65–0.99, p = 0.04) and obese individuals (A-C-G-* is referent; ORA-C-G-9 = 0.70, 95% CI 0.49–0.99, p = 0.04) were less likely to possess the haplotype with the 3'variant allele (A-C-G-9). Conclusion Our results support a role of genetic variation at the dopamine transporter gene, SLC6A3, as a modifier of BMI.
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Affiliation(s)
- Elizabeth M Azzato
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, Maryland, USA.
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Hirata H, Hinoda Y, Okayama N, Suehiro Y, Kawamoto K, Kikuno N, Rabban JT, Chen LM, Dahiya R. COMT polymorphisms affecting protein expression are risk factors for endometrial cancer. Mol Carcinog 2008; 47:768-74. [PMID: 18324659 DOI: 10.1002/mc.20432] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In estrogen metabolic pathways, the COMT enzyme is related to detoxification. COMT gene polymorphisms have been shown to effect enzyme function. We hypothesized that these polymorphisms may be risk factors for endometrial cancer (EC). DNA samples from 150 cases of EC and healthy controls (n = 165) were analyzed by PCR-RFLP to determine the genotypic frequency of four different polymorphic loci on COMT [codon 62 (rs4633), 102 (rs5031015), 136 (rs4818), 158 (rs4680)]. Genotyping was confirmed by direct DNA sequencing. We also conducted haplotype analysis of COMT and investigated the relationship between COMT expression and COMT SNPs in EC tissues by immunohistochemistry. A significant increase in the T/T genotype of codon 62 (C/T) was observed in patients compared to controls (OR = 2.39, 95% CI: 1.31-4.37, P = 0.004). The frequency of the C-G haplotype of codon 62 C/T and codon 158 G/A was significantly higher in controls (P < 0.0001) than in patients. The expression level of COMT protein in EC tissues was significantly lower in COMT codon 62 variant TT and codon 158 variant AA genotype carriers. Therefore, the EC samples with polymorphic variants of COMT lead to lower expression of COMT protein whereas EC samples with wild-type codon 62 C/C and codon 158 G/G have higher expression of COMT protein. This is the first study demonstrating that polymorphisms in COMT codon 62 and codon 158 altered protein expression levels in EC, suggesting that they may be risk factors for EC in Caucasians.
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Affiliation(s)
- Hiroshi Hirata
- Department of Urology, Veterans Affairs Medical Center and University of California at San Francisco, San Francisco, California 94121, USA
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