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Zhu J, Saikia G, Zhang X, Shen X, Kahe K. One-Carbon Metabolism Nutrients, Genetic Variation, and Diabetes Mellitus. Diabetes Metab J 2024; 48:170-183. [PMID: 38468500 PMCID: PMC10995489 DOI: 10.4093/dmj.2023.0272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 02/22/2024] [Indexed: 03/13/2024] Open
Abstract
Diabetes mellitus (DM) affects about 9.3% of the population globally. Hyperhomocysteinemia (HHcy) has been implicated in the pathogenesis of DM, owing to its promotion of oxidative stress, β-cell dysfunction, and insulin resistance. HHcy can result from low status of one-carbon metabolism (OCM) nutrients (e.g., folate, choline, betaine, vitamin B6, B12), which work together to degrade homocysteine by methylation. The etiology of HHcy may also involve genetic variation encoding key enzymes in OCM. This review aimed to provide an overview of the existing literature assessing the link between OCM nutrients status, related genetic factors, and incident DM. We also discussed possible mechanisms underlying the role of OCM in DM development and provided recommendations for future research and practice. Even though the available evidence remains inconsistent, some studies support the potential beneficial effects of intakes or blood levels of OCM nutrients on DM development. Moreover, certain variants in OCM-related genes may influence metabolic handling of methyl-donors and presumably incidental DM. Future studies are warranted to establish the causal inference between OCM and DM and examine the interaction of OCM nutrients and genetic factors with DM development, which will inform the personalized recommendations for OCM nutrients intakes on DM prevention.
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Affiliation(s)
- Jie Zhu
- Nutrition and Foods Program, School of Family and Consumer Sciences, Texas State University, San Marcos, TX, USA
| | - Gunjana Saikia
- Nutrition and Foods Program, School of Family and Consumer Sciences, Texas State University, San Marcos, TX, USA
| | - Xiaotao Zhang
- Institute for Translational Epidemiology & Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Xiaoxi Shen
- Department of Mathematics, Texas State University, San Marcos, TX, USA
| | - Ka Kahe
- Department of Obstetrics and Gynecology, Vagelos College of Physician and Surgeons, Columbia University, New York, NY, USA
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
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Li K, Shao X, Li H, Kuang X, Song X, Wang Y, Zhu S, Li D. Synergistic Effects of Folic Acid and n-3 Polyunsaturated Fatty Acid in Preventing Neural Tube Defects in Diabetic Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11281-11289. [PMID: 36039894 DOI: 10.1021/acs.jafc.2c03806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present study aimed to investigate whether a combination of folic acid (FA) and n-3 polyunsaturated fatty acids (PUFA) has a better preventive effect on maternal diabetes-induced neural tube defects (NTD) than FA alone. The experiment included five groups of pregnant mice: healthy control (HC), diabetes mellitus control (DMC), diabetes + n-3 PUFA (DMn-3), diabetes + FA (DMFA), and diabetes + FA + n-3 PUFA (DMFA + n-3). The incidence of NTD in DMFA + n-3 (1.04%) was significantly lower than that in DMFA (8.57%) and DMn-3 (7.82%). The incidence of NTD in DMFA and DMn-3 was significantly lower than that in DMC (19.41%). DMFA + n-3 had a lower apoptosis of neuroepithelial cells, a lower expression of P53 and Bax, and a higher expression of Pax3 and Bcl-2, compared with DMFA and DMn-3. Combination of FA and n-3 PUFA attenuated diabetes-induced hypermethylation of Pax3, overexpression and overactivity of Dnmt3b, abnormal expression of genes involved in one-carbon metabolism and elevation of homocysteine, and these improving effects were better than FA or n-3 PUFA alone. In conclusion, the combination of FA and n-3 PUFA has a synergistic effect on preventing maternal diabetes-induced NTD.
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Affiliation(s)
- Kelei Li
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Xianfeng Shao
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Huiying Li
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Xiaotong Kuang
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Xiaolei Song
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Yan Wang
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Suqin Zhu
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
| | - Duo Li
- Institute of Nutrition and Health, Qingdao University, Qingdao 266071, China
- School of Public Health, Qingdao University, Qingdao 266071, China
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A Common Polymorphism in the MTHFD1 Gene Is a Modulator of Risk of Congenital Heart Disease. J Cardiovasc Dev Dis 2022; 9:jcdd9060166. [PMID: 35735795 PMCID: PMC9224796 DOI: 10.3390/jcdd9060166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 02/05/2023] Open
Abstract
Several environmental and genetic factors may influence the risk of congenital heart defects (CHDs), which can have a substantial impact on pediatric morbidity and mortality. We investigated the association of polymorphisms in the genes of the folate and methionine pathways with CHDs using different strategies: a case–control, mother–child pair design, and a family-based association study. The polymorphism rs2236225 in the MTHFD1 was confirmed as an important modulator of CHD risk in both, whereas polymorphisms in MTRR, FPGS, and SLC19A1 were identified as risk factors in only one of the models. A strong synergistic effect on the development of CHDs was detected for MTHFD1 polymorphism and a lack of maternal folate supplementation during early pregnancy. A common polymorphism in the MTHFD1 is a genetic risk factor for the development of CHD, especially in the absence of folate supplementation in early pregnancy.
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Spratlen MJ, Grau-Perez M, Umans JG, Yracheta J, Best LG, Francesconi K, Goessler W, Balakrishnan P, Cole SA, Gamble MV, Howard BV, Navas-Acien A. Arsenic, one carbon metabolism and diabetes-related outcomes in the Strong Heart Family Study. ENVIRONMENT INTERNATIONAL 2018; 121:728-740. [PMID: 30321848 PMCID: PMC6221918 DOI: 10.1016/j.envint.2018.09.048] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 05/02/2023]
Abstract
BACKGROUND Inorganic arsenic exposure and inter-individual differences in its metabolism have been associated with cardiometabolic risk. A more efficient arsenic metabolism profile (lower MMA%, higher DMA%) has been associated with reduced risk for arsenic-related health outcomes; however, this profile has also been associated with increased risk for diabetes-related outcomes. The mechanism behind these contrasting associations is equivocal; we hypothesized one carbon metabolism (OCM) may play a role. METHODS We evaluated the association between OCM-related variables (nutrient intake and genetic variants) and both arsenic metabolism biomarkers (iAs%, MMA% and DMA%) and diabetes-related outcomes (metabolic syndrome, diabetes, HOMA2-IR and waist circumference) in 935 participants free of prevalent diabetes and metabolic syndrome from the Strong Heart Family Study, a family-based prospective cohort comprised of American Indian tribal members aged 14+ years. RESULTS Of the 935 participants free of both diabetes and metabolic syndrome at baseline, 279 (29.8%) developed metabolic syndrome over a median of 5.3 years of follow-up and of the 1458 participants free of diabetes at baseline, 167 (11.3%) developed diabetes over follow-up. OCM nutrients were not associated with arsenic metabolism, however, higher vitamin B6 was associated with diabetes-related outcomes (higher HOMA2-IR and increased risk for diabetes and metabolic syndrome). A polymorphism in an OCM-related gene, methionine synthase (MTR), was associated with both higher MMA% (β = 2.57, 95% CI: 0.22, 4.92) and lower HOMA2-IR (GMR = 0.79, 95% CI = 0.66, 0.93 per 5 years of follow-up). Adjustment for OCM variables did not affect previously reported associations between arsenic metabolism and diabetes-related outcomes; however, the association between the MTR variant and diabetes-related outcomes were attenuated after adjustment for arsenic metabolism. CONCLUSIONS Our findings suggest MMA% may be a partial mediator in the association between OCM and diabetes-related outcomes. Additional mediation analyses with longer follow-up period are needed to confirm this finding. Further research is needed to determine whether excess B vitamin intake is associated with increased risk for diabetes-related outcomes.
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Affiliation(s)
- Miranda J Spratlen
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, NY, New York, United States of America; Department of Environmental Health & Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States of America.
| | - Maria Grau-Perez
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, NY, New York, United States of America; Fundación Investigación Clínico de Valencia-INCLIVA, Area of Cardiometabolic and Renal Risk, Valencia, Spain; Department of Statistics and Operational Research, University of Valencia, Valencia, Spain
| | - Jason G Umans
- MedStar Health Research Institute, Hyattsville, MD, United States of America; Department of Medicine, Georgetown University School of Medicine, Washington, DC, United States of America
| | - Joseph Yracheta
- Missouri Breaks Industries Research, Inc., Eagle Butte, SD, United States of America
| | - Lyle G Best
- Missouri Breaks Industries Research, Inc., Eagle Butte, SD, United States of America
| | - Kevin Francesconi
- Institute of Chemistry - Analytical Chemistry, University of Graz, Austria
| | - Walter Goessler
- Institute of Chemistry - Analytical Chemistry, University of Graz, Austria
| | - Poojitha Balakrishnan
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, NY, New York, United States of America
| | - Shelley A Cole
- Texas Biomedical Research Institute, San Antonio, TX, United States of America
| | - Mary V Gamble
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, NY, New York, United States of America
| | - Barbara V Howard
- MedStar Health Research Institute, Hyattsville, MD, United States of America; Department of Medicine, Georgetown University School of Medicine, Washington, DC, United States of America
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, NY, New York, United States of America; Department of Environmental Health & Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States of America
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Seremak-Mrozikiewicz A, Barlik M, Różycka A, Kurzawińska G, Klejewski A, Wolski H, Drews K. Importance of polymorphic variants of phosphatidylethanolamine N-methyltransferase (PEMT) gene in the etiology of intrauterine fetal death in the Polish population. Eur J Obstet Gynecol Reprod Biol 2018; 231:43-47. [PMID: 30321787 DOI: 10.1016/j.ejogrb.2018.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/03/2018] [Accepted: 10/06/2018] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Intrauterine fetal death (IUFD) is a multifactorial disorder and one of the most severe obstetrical complications. Our primary aim was to study the possible associations between polymorphic variants of the PEMT gene and IUFD in the Polish population. STUDY DESIGN The case-control study involved 76 mothers with IUFD occurrence and 215 mothers of healthy children. Genetic analysis of the four single nucleotide polymorphisms in the PEMT gene (rs4646406, rs4244593, rs897453 and rs12325817) was performed with the PCR/RFLP method. RESULTS Three oef the analyzed PEMT polymorphisms (rs4646406, rs4244593, and rs8974) were significantly associated with IUFD in the Polish population. Among them, PEMT variant rs4244593 was associated with increased risk of IUFD in three genetic inheritance models. Results were statistically significant even after applying Bonferroni correction for multiple comparisons (p < 0.0125). The distribution of all haplotypes except TAGC was not different between cases and controls, however, after applying permutation test, none of the haplotypes showed a relation with IUFD. CONCLUSIONS The present findings indicate that PEMT polymorphisms may be associated with the susceptibility to IUFD in the Polish population.
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Zhao JV, Schooling CM, Zhao JX. The effects of folate supplementation on glucose metabolism and risk of type 2 diabetes: a systematic review and meta-analysis of randomized controlled trials. Ann Epidemiol 2018; 28:249-257.e1. [PMID: 29501221 DOI: 10.1016/j.annepidem.2018.02.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 10/30/2017] [Accepted: 02/06/2018] [Indexed: 01/11/2023]
Abstract
PURPOSE Observationally, homocysteine is associated with higher risk of diabetes. Folate, which reduces homocysteine, is promising for the prevention and treatment of diabetes. Previous meta-analysis of three trials suggested folate might lower hemoglobin A1c (HbA1c). METHODS An updated systematic review and meta-analysis of placebo-controlled randomized trials was conducted. We searched PubMed using ("folate" or "folic acid") and trial and ("glucose" or "diabetes" or "insulin" or "hemoglobin A1c" or "HbA1c") in any field until February 3, 2017. We also conducted a bibliographic search of selected studies and relevant reviews. Relative risk of diabetes and mean differences in indicators of glucose metabolism between folate and placebo were summarized in a meta-analysis using inverse variance weighting with random effects. Heterogeneity, publication bias, and risk of bias were also assessed. RESULTS Eighteen trials of 21,081 people with/without diabetes were identified. Folate decreased fasting glucose (-0.15 mmol/L, 95% confidence interval [CI] -0.29 to -0.01), homeostatic model assessment-insulin resistance (-0.83, 95% CI -1.31 to -0.34), and insulin (-1.94 μIU/mL, 95% CI -3.28 to -0.61) but had no clear effect on diabetes or HbA1c. CONCLUSIONS Our study suggests a potential benefit of folate on insulin resistance and glycemic control; the latter requires examination in more high-quality trials.
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Affiliation(s)
- Jie V Zhao
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, China.
| | - C Mary Schooling
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, China; School of Urban Public Health, Hunter College, CUNY School of Public Health, New York, NY
| | - Jia Xi Zhao
- School of Biomedical Science, Li Ka Shing Faculty of Medicine, The University of Hong Kong, China
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Attia HR, Kamel SA, Ibrahim MH, Farouk HA, Rahman AH, Sayed GH, Musa NI. Open-array analysis of genetic variants in Egyptian patients with type 2 diabetes and obesity. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2017. [DOI: 10.1016/j.ejmhg.2017.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Furusawa T, Naka I, Yamauchi T, Natsuhara K, Eddie R, Kimura R, Nakazawa M, Ishida T, Ohtsuka R, Ohashi J. Polymorphisms associated with a tropical climate and root crop diet induce susceptibility to metabolic and cardiovascular diseases in Solomon Islands. PLoS One 2017; 12:e0172676. [PMID: 28253292 PMCID: PMC5333831 DOI: 10.1371/journal.pone.0172676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 02/08/2017] [Indexed: 01/19/2023] Open
Abstract
The people of the Solomon Islands represent an Austronesian (AN)-speaking population's adaptation to a humid tropical environment and subsistence of tuberous crops. Genome-wide association studies (GWASs) of other populations (e.g. the Human Genome Diversity Project [HGDP]) have suggested the existence of genotypes adaptive to ecoregion, diet, and subsistence, and that those genotypes are also associated with metabolic and cardiovascular diseases. Recently, the incidence of non-communicable diseases has been increasing in the Solomon Islands. In the present study, we explored the association of genotypes adaptive to a tropical environment and tuberous crop diet with metabolic and cardiovascular conditions in rural and urban AN-speaking Melanesian and Micronesian populations of the Solomon Islands. A total of 561 participants were genotyped for single nucleotide polymorphisms (SNPs) potentially associated with a tropical environment (rs174570 and rs2237892) and a tuberous crop diet (rs162036, rs185819, and rs2722425). The results showed that the allele frequencies of the Solomon Islands populations adopted patterns similar to those in populations from other hot, tropical areas with a tuberous crop diet in previous studies. Furthermore, rs162036, rs185819, rs2237892, and rs2722425 were all strongly associated with one or more metabolic and cardiovascular conditions. The derived allele of rs2722425 (i.e. rs2722425-G) was significantly associated with an elevated LDL level (P = 0.000264) even after the significance level was adjusted for multiple testing (i.e., α = 0.0005). Our results suggest that the inhabitants of the Solomon Islands exhibit the effects of the tropical environment and tuberous crop diet on their allele frequencies, and that their susceptibility to metabolic and cardiovascular diseases is therefore considered to be associated with their environment and diet.
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Affiliation(s)
- Takuro Furusawa
- Graduate School of Asian and African Area Studies, Kyoto University, Kyoto, Japan
| | - Izumi Naka
- Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Taro Yamauchi
- Graduate School of Health Sciences, Hokkaido University, Hokkaido, Japan
| | | | - Ricky Eddie
- National Gizo Hospital, Ministry of Health and Medical Services, Gizo, Solomon Islands
| | - Ryosuke Kimura
- Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Minato Nakazawa
- Department of International Health, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Takafumi Ishida
- Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | | | - Jun Ohashi
- Graduate School of Science, The University of Tokyo, Tokyo, Japan
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Zhi X, Yang B, Fan S, Li Y, He M, Wang D, Wang Y, Wei J, Zheng Q, Sun G. Additive Interaction of MTHFR C677T and MTRR A66G Polymorphisms with Being Overweight/Obesity on the Risk of Type 2 Diabetes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:E1243. [PMID: 27983710 PMCID: PMC5201384 DOI: 10.3390/ijerph13121243] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 12/01/2016] [Accepted: 12/02/2016] [Indexed: 01/01/2023]
Abstract
Although both methylenetetrahydrofolate reductase (MTHFR) C677T and methionine synthase reductase (MTRR) A66G polymorphisms have been associated with type 2 diabetes (T2D), their interactions with being overweight/obesity on T2D risk remain unclear. To evaluate the associations of the two polymorphisms with T2D and their interactions with being overweight/obesity on T2D risk, a case-control study of 180 T2D patients and 350 healthy controls was conducted in northern China. Additive interaction was estimated using relative excess risk due to interaction (RERI), attributable proportion due to interaction (AP) and synergy index (S). After adjustments for age and gender, borderline significant associations of the MTHFR C677T and MTRR A66G polymorphisms with T2D were observed under recessive (OR = 1.43, 95% CI: 0.98-2.10) and dominant (OR = 1.43, 95% CI: 1.00-2.06) models, respectively. There was a significant interaction between the MTHFR 677TT genotype and being overweight/obesity on T2D risk (AP = 0.404, 95% CI: 0.047-0.761), in addition to the MTRR 66AG/GG genotypes (RERI = 1.703, 95% CI: 0.401-3.004; AP = 0.528, 95% CI: 0.223-0.834). Our findings suggest that individuals with the MTHFR 677TT or MTRR 66AG/GG genotypes are more susceptible to the detrimental effect of being overweight/obesity on T2D. Further large-scale studies are still needed to confirm our findings.
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Affiliation(s)
- Xueyuan Zhi
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
| | - Boyi Yang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Shujun Fan
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
| | - Yongfang Li
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
| | - Miao He
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
| | - Da Wang
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
| | - Yanxun Wang
- Division of Molecular Preventive Medicine, Shanghai Institute of Targeted Therapy and Molecular Medicine, Shanghai 200433, China.
| | - Jian Wei
- Brain Disease Center, Tianjin Dagang Oil Field General Hospital, Tianjin 300280, China.
| | - Quanmei Zheng
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
| | - Guifan Sun
- Research Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110122, China.
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Judge MP, Casavant SG, Dias JAM, McGrath JM. Reduced DHA transfer in diabetic pregnancies: mechanistic basis and long-term neurodevelopmental implications. Nutr Rev 2016; 74:411-20. [PMID: 27142302 DOI: 10.1093/nutrit/nuw006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Infants born to diabetic mothers have a higher frequency of impaired neurodevelopment. The omega-3 or n-3 fatty acid docosahexaenoic acid (DHA) is an important structural component of neural tissue and is critical for fetal brain development. Maternal DHA supplementation during pregnancy is linked to better infant neurodevelopment; however, maternal-fetal transfer of DHA is reduced in women with diabetes. Evidence of mechanisms explaining altered maternal-fetal DHA transfer in this population is limited. This review explores existing evidence underpinning reduced maternal-fetal DHA transfer in maternal fuel metabolism in this population. Further research is necessary to evaluate the role of peroxisome proliferator-activated receptors in modulating placental fatty acid binding and maternal-fetal DHA transfer. Considerations for clinical practice include a diet high in DHA and/or provision of supplemental DHA to obstetric diabetic patients within minimum guidelines.
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Affiliation(s)
- Michelle P Judge
- M.P Judge, S.G. Casavant, J.A.M. Dias, and J.M. McGrath are with the University of Connecticut, School of Nursing, Storrs, Connecticut, USA. J.M. McGrath and S.G. Casavant are with the Connecticut Children's Medical Center, Hartford, Connecticut, USA.J.A.M. Dias is with the Nursing Department, Federal University of Ceará, Fortaleza Ceará, Brazil.
| | - Sharon G Casavant
- M.P Judge, S.G. Casavant, J.A.M. Dias, and J.M. McGrath are with the University of Connecticut, School of Nursing, Storrs, Connecticut, USA. J.M. McGrath and S.G. Casavant are with the Connecticut Children's Medical Center, Hartford, Connecticut, USA.J.A.M. Dias is with the Nursing Department, Federal University of Ceará, Fortaleza Ceará, Brazil
| | - Juliana A M Dias
- M.P Judge, S.G. Casavant, J.A.M. Dias, and J.M. McGrath are with the University of Connecticut, School of Nursing, Storrs, Connecticut, USA. J.M. McGrath and S.G. Casavant are with the Connecticut Children's Medical Center, Hartford, Connecticut, USA.J.A.M. Dias is with the Nursing Department, Federal University of Ceará, Fortaleza Ceará, Brazil
| | - Jacqueline M McGrath
- M.P Judge, S.G. Casavant, J.A.M. Dias, and J.M. McGrath are with the University of Connecticut, School of Nursing, Storrs, Connecticut, USA. J.M. McGrath and S.G. Casavant are with the Connecticut Children's Medical Center, Hartford, Connecticut, USA.J.A.M. Dias is with the Nursing Department, Federal University of Ceará, Fortaleza Ceará, Brazil
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Abbasi A. Mendelian randomization studies of biomarkers and type 2 diabetes. Endocr Connect 2015; 4:249-60. [PMID: 26446360 PMCID: PMC4654400 DOI: 10.1530/ec-15-0087] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 10/07/2015] [Indexed: 12/16/2022]
Abstract
Many biomarkers are associated with type 2 diabetes (T2D) risk in epidemiological observations. The aim of this study was to identify and summarize current evidence for causal effects of biomarkers on T2D. A systematic literature search in PubMed and EMBASE (until April 2015) was done to identify Mendelian randomization studies that examined potential causal effects of biomarkers on T2D. To replicate the findings of identified studies, data from two large-scale, genome-wide association studies (GWAS) were used: DIAbetes Genetics Replication And Meta-analysis (DIAGRAMv3) for T2D and the Meta-Analyses of Glucose and Insulin-related traits Consortium (MAGIC) for glycaemic traits. GWAS summary statistics were extracted for the same genetic variants (or proxy variants), which were used in the original Mendelian randomization studies. Of the 21 biomarkers (from 28 studies), ten have been reported to be causally associated with T2D in Mendelian randomization. Most biomarkers were investigated in a single cohort study or population. Of the ten biomarkers that were identified, nominally significant associations with T2D or glycaemic traits were reached for those genetic variants related to bilirubin, pro-B-type natriuretic peptide, delta-6 desaturase and dimethylglycine based on the summary data from DIAGRAMv3 or MAGIC. Several Mendelian randomization studies investigated the nature of associations of biomarkers with T2D. However, there were only a few biomarkers that may have causal effects on T2D. Further research is needed to broadly evaluate the causal effects of multiple biomarkers on T2D and glycaemic traits using data from large-scale cohorts or GWAS including many different genetic variants.
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Affiliation(s)
- Ali Abbasi
- MRC Epidemiology UnitUniversity of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Addenbrooke's Hospital, Post Box 285, Cambridge CB2 0QQ, UKDepartment of Epidemiology and Department of Internal Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands MRC Epidemiology UnitUniversity of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Addenbrooke's Hospital, Post Box 285, Cambridge CB2 0QQ, UKDepartment of Epidemiology and Department of Internal Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Li K, Huang T, Zheng JS, Sun J, Chen Y, Xie H, Xu D, Wan J, Li D. Interaction between Erythrocyte Phospholipid Fatty Acids Composition and Variants of Inflammation-Related Genes on Type 2 Diabetes. JOURNAL OF NUTRIGENETICS AND NUTRIGENOMICS 2015; 7:252-63. [DOI: 10.1159/000381347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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