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Tam CHT, Wang Y, Lee HM, Luk AOY, Tong PCY, Chan MHM, Ozaki R, Kong APS, So WY, Chan JCN, Ma RCW. Early gene-diet interaction between glucokinase regulatory protein (GCKR) polymorphism, vegetable and fish intakes in modulating triglyceride levels in healthy adolescents. Nutr Metab Cardiovasc Dis 2015; 25:951-958. [PMID: 26234566 DOI: 10.1016/j.numecd.2015.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 06/29/2015] [Accepted: 06/29/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIMS The benefits of dietary vegetable and fish consumptions on improving glucose and lipid metabolism have been well established. Recently, the T-allele of a common genetic variant rs780094 at glucokinase regulatory protein (GCKR) was reported to be associated with elevated triglyceride (TG) levels but reduced fasting plasma glucose (FPG) and type 2 diabetes risk. However, the dietary modulation on genetic risk is not clearly understood. METHODS AND RESULTS A cohort of 2095 Chinese adolescents (mean age 15.6 ± 2.0 years, 45.3% male) recruited from a population-based school survey for cardiovascular risk factor assessment, with dietary data including weekly vegetable and fish consumptions as well as clinical data were genotyped for the GCKR rs780094 polymorphism. In the linear regression analysis with adjustment for sex, age, body mass index, and socioeconomic status (school banding, paternal and maternal education levels), the frequency of vegetable intake per week was inversely associated with FPG (P = 0.044). Individuals with low fish intake generally had elevated TG levels but reduced TC, HDL-C and LDL-C (0.006 < P < 0.029). We also observed significant associations of the minor T-allele of GCKR rs780094 with decreased FPG (P = 0.013) and increased TG levels (P = 2.7 × 10(-8)). There were significant gene-diet interactions between rs780094 and vegetable consumption (P(interaction) = 0.009), and between rs780094 and fish consumption (P(interaction) = 0.031) in modulating TG levels. The T-allele of GCKR locus was associated with higher TG levels amongst individuals with ≥7 vegetable meals per week (P = 6.4 × 10(-9)), and among individuals with <7 fish meals per week (P = 0.020 and 7.0 × 10(-7) for 4-6 and ≤3 meals per week, respectively). High intake of vegetable exerted a reduction in TG levels only among CC genotype carriers (Ptrend = 0.020), while high intake of fish was associated with reduced TG levels only among TT genotype carriers (Ptrend = 0.026). CONCLUSIONS In summary, our data indicated that the favorable associations of higher vegetable and fish intakes on TG levels are dependent on the genetic background of an individual. In particular, at-risk TT- genotype carriers of the GCKR variant may derive more benefits from a high fish intake, while the CC-genotype carriers may find further benefits from a high consumption of vegetable.
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Affiliation(s)
- C H T Tam
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong
| | - Y Wang
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong
| | - H M Lee
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong
| | - A O Y Luk
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong
| | - P C Y Tong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong
| | - M H M Chan
- Department of Chemical Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - R Ozaki
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong
| | - A P S Kong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong
| | - W Y So
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong
| | - J C N Chan
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong
| | - R C W Ma
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong (CUHK), Prince of Wales Hospital (PWH), Hong Kong; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong; CUHK-PWH International Diabetes Federation (IDF) Centre of Education, Hong Kong.
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Tam CHT, Wang Y, Luan J, Lee HM, Luk AOY, Tutino GE, Tong PCY, Ko GTC, Ozaki R, Tam WH, Kong APS, So WY, Chan JCN, Ma RCW. Non-linear relationship between birthweight and cardiometabolic risk factors in Chinese adolescents and adults. Diabet Med 2015; 32:220-5. [PMID: 25388749 DOI: 10.1111/dme.12630] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/07/2014] [Indexed: 02/01/2023]
Abstract
AIM To investigate the relationship between birthweight and cardiometabolic traits in two cohorts: one of Chinese adolescents and one of Chinese adults. METHODS Birthweight and clinical data, including anthropometric traits, fasting plasma glucose and fasting plasma insulin levels, blood pressure and lipid profiles were collected from 2035 adolescents and 456 adults. A subset of 735 subjects underwent an oral glucose tolerance test to measure the glucose and insulin concentrations at 0, 15, 30, 60 and 120 min. RESULTS Among adolescents, birthweight showed U-shaped relationships with larger body size, obesity, abdominal obesity in girls, insulin resistance and worse lipid profiles (0.0013 < P(quadratic) < 0.0499), as well as an inverse association with fasting plasma glucose (P(linear) = 0.0368). After further adjustment for adiposity, decreasing birthweight was associated with elevated fasting plasma glucose levels, greater insulin resistance and worse lipid profiles (3.1 × 10⁻⁵ < P(linear) < 0.0058). Among adults, high birthweight was associated with larger body size and abdominal obesity in men, while low birthweight was associated with elevated glucose levels at 15, 30, 60 and 120 min and a greater area under the curve at 0-120 min, as well as with β-cell dysfunction (6.5 × 10⁻⁵ < P(linear) < 0.0437). Adjustment for adult adiposity did not substantially change the relationships. There was significant interaction between birthweight and abdominal obesity in elevating fasting plasma insulin and homeostasis model assessment of insulin resistance (P > 0.05), with abdominally obese adolescents in the lowest birthweight category (≤ 2.5 kg) having the highest risk of insulin resistance. CONCLUSIONS Both high and low birthweights are associated with an increased risk of cardiometabolic abnormalities including obesity, abdominal obesity, hyperglycaemia, dyslipidaemia and insulin resistance, as well as with β-cell dysfunction.
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Affiliation(s)
- C H T Tam
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
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Tam CHT, Wang Y, Luan J, Lee HM, Luk AOY, Tutino GE, Tong PCY, Kong APS, So WY, Chan JCN, Ma RCW. Maternal history of diabetes is associated with increased cardiometabolic risk in Chinese. Nutr Diabetes 2014; 4:e112. [PMID: 24614663 PMCID: PMC3974036 DOI: 10.1038/nutd.2014.9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 02/05/2014] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE Positive family history is associated with increased type 2 diabetes (T2D) risk, and reflects both genetic and environmental risks. Several studies have suggested an excess maternal transmission of T2D, although the underlying mechanism is unknown. We aimed to examine the association between maternal diabetes and cardiometabolic risk in the offspring. METHODS Parental history of diabetes and clinical data including anthropometric traits, fasting plasma glucose and insulin (FPG, FPI), blood pressure and lipid profile were collected from 2581 unrelated Chinese offspring (2026 adolescents from a population-based school survey and 555 adults from a community-based health screening programme). A subset of subjects (n=834) underwent oral glucose tolerance test to measure the glucose and insulin concentrations at 0, 15, 30, 60 and 120 min for evaluation of the areas under the curve (AUC) of glucose and insulin at 0-120 min, homoeostasis model assessment of insulin resistance (HOMA-IR) and bell-cell function, insulinogenic index, insulin sensitivity index (ISI) and oral disposition index (DI). RESULTS A positive parental history of diabetes was associated with increased risk of obesity (odd ratios (OR) (95% confidence interval (CI))=1.48 (1.10-2.00)), central obesity (OR (95% CI)=1.67 (1.21-2.32)), higher FPI, HOMA-IR, 2-h insulin, AUC of glucose at 0-120 min, triglycerides, reduced ISI and DI. Compared with individuals without parental diabetes, offspring with diabetic mother had significantly increased risk of obesity (OR (95% CI)=1.59 (1.07-2.35)), central obesity (OR (95% CI)=1.88 (1.23-2.88)), higher glucose levels and BP, were more insulin resistant but also had impaired first-phase insulin response and worse lipid profile. However, paternal history of diabetes had no effect on any of the studied traits, except higher body mass index, waist circumference in females and FPG. CONCLUSIONS Our findings suggested that maternal history of diabetes conferred increased risk of cardiometabolic abnormalities, and was associated with both insulin resistance and impaired first-phase insulin secretion. Further investigation into the mechanism of transgenerational diabetes is warranted.
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Affiliation(s)
- C H T Tam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - Y Wang
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - J Luan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - H M Lee
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - A O Y Luk
- 1] Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong [2] CUHK-PWH IDF Centre of Education, Hong Kong
| | - G E Tutino
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - P C Y Tong
- 1] Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong [2] CUHK-PWH IDF Centre of Education, Hong Kong [3] Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong
| | - A P S Kong
- 1] Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong [2] CUHK-PWH IDF Centre of Education, Hong Kong [3] Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong [4] Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
| | - W Y So
- 1] Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong [2] CUHK-PWH IDF Centre of Education, Hong Kong [3] Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong
| | - J C N Chan
- 1] Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong [2] CUHK-PWH IDF Centre of Education, Hong Kong [3] Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong [4] Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
| | - R C W Ma
- 1] Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong [2] CUHK-PWH IDF Centre of Education, Hong Kong [3] Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong [4] Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
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Ma RCW, So WY, Tam CHT, Luk AO, Ho JSK, Wang Y, Lam VK, Lee HM, Kong AP, Tong PC, Xu G, Chow CC, Ng MC, Yang XL, Chan JC. Genetic variants for type 2 diabetes and new-onset cancer in Chinese with type 2 diabetes. Diabetes Res Clin Pract 2014; 103:328-37. [PMID: 24468095 DOI: 10.1016/j.diabres.2013.12.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 10/24/2013] [Accepted: 12/18/2013] [Indexed: 12/19/2022]
Abstract
BACKGROUND Diabetes is associated with an increased risk of cancer. This study aimed to evaluate associations between recently reported type 2 diabetes (T2D) susceptibility genetic variants and cancer risk in a prospective cohort of Chinese patients with T2D. METHODS Seven single nucleotide polymorphisms (SNP) in IGF2BP2, CDKAL1, SLC30A8, CDKN2A/B, HHEX and TCF7L2, all identified from genome-wide association studies of T2D, were genotyped in 5900 T2D patients [age mean ± SD = 57 ± 13 years, % males = 46] without any known cancer at baseline. Associations between new-onset of cancer and SNPs were tested by Cox proportional hazard models with adjustment of conventional risk factors. RESULTS During the mean follow-up period of 8.5 ± 3.3 years, 429 patients (7.3%) developed cancer. Of the T2D-related SNPs, the G-alleles of HHEX rs7923837 (hazard ratio [HR] (95% C.I.) = 1.34 (1.08-1.65); P = 6.7 ×10(-3) under dominant model) and TCF7L2 rs290481 (HR (95% C.I.) = 1.16 (1.01-1.33); P = 0.040 under additive model) were positively associated with cancer risk, while the G-allele of CDKAL1 rs7756992 was inversely associated (HR (95% C.I.) = 0.80 (0.65-1.00); P = 0.048 under recessive model). The risk alleles of these significant SNPs exhibited combined effect on increasing cancer risk (per-allele HR (95% C.I.) = 1.25 (1.12-1.39); P = 4.8 × 10(-5)). The adjusted cancer risk was 2.41 (95% C.I. 1.23-4.69) for patients with four risk alleles comparing to patients without risk allele. CONCLUSIONS T2D-related variants HHEX rs7923837, TCF7L2 rs290481 and CDKAL1 rs7756992 increased cancer risk in patients with diabetes. IMPACT Our findings provide novel insights into the pathogenesis of cancer in diabetes.
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Affiliation(s)
- R C W Ma
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong; Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong; Lee Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong.
| | - W Y So
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.
| | - C H T Tam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - A O Luk
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - J S K Ho
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - Y Wang
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - V K Lam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - H M Lee
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - A P Kong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - P C Tong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - G Xu
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong; Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong; Lee Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
| | - C C Chow
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - M C Ng
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - X L Yang
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - J C Chan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong; Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong; Lee Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
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Ng MCY, Lam VKL, Tam CHT, Chan AWH, So WY, Ma RCW, Zee BCY, Waye MMY, Mak WW, Hu C, Wang CR, Tong PCY, Jia WP, Chan JCN. Association of the POU class 2 homeobox 1 gene (POU2F1) with susceptibility to Type 2 diabetes in Chinese populations. Diabet Med 2010; 27:1443-9. [PMID: 21059098 DOI: 10.1111/j.1464-5491.2010.03124.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
AIMS POU class 2 homeobox 1 (POU2F1), also known as octamer-binding transcription factor-1 (OCT-1), is a ubiquitous transcription factor that plays a key role in the regulation of genes related to inflammation and cell cycles. POU2F1 is located on chromosome 1q24, a region with linkage for Type 2 diabetes in Chinese and other populations. We examined the association of POU2F1 genetic variants with Type 2 diabetes in Hong Kong Chinese using two independent cohorts. METHODS We genotyped five haplotype-tagging single nucleotide polymorphisms at POU2F1 in 1378 clinic-based patients with Type 2 diabetes and 601 control subjects, as well as 707 members from 179 families with diabetes. RESULTS We found significant associations of rs4657652, rs7532692, rs10918682 and rs3767434 (OR = 1.26-1.59, 0.0003 < P(unadjusted) < 0.035) with Type 2 diabetes in the clinic-based case-control cohorts. Rs3767434 was also associated with Type 2 diabetes (OR = 1.55, P(unadjusted) = 0.013) in the family-based cohort. Meta-analysis revealed similar associations. In addition, the risk G allele of rs10918682 showed increased usage of insulin treatment during a mean follow-up period of 7 years [hazard ratio = 1.50 (1.05-2.14), P = 0.025]. CONCLUSIONS Using separate cohorts, we observed consistent results showing the contribution of multiple variants at POU2F1 to the risk of Type 2 diabetes.
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Affiliation(s)
- M C Y Ng
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China.
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Mong JLY, Ng MCY, Guldan GS, Tam CHT, Lee HM, Ma RCW, So WY, Wong GWK, Kong APS, Chan JCN, Waye MMY. Associations of insulin-like growth factor binding protein-3 gene polymorphisms with IGF-I activity and lipid parameters in adolescents. Int J Obes (Lond) 2010; 33:1446-53. [PMID: 19786971 DOI: 10.1038/ijo.2009.186] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Childhood obesity is a growing global epidemic. Recent studies indicate that obesity and related metabolic traits are highly heritable. Increasing evidence suggests that growth hormone (GH) and the insulin-like growth factor-I (IGF-I) axis have important functions in regulating adiposity and insulin sensitivity. Five single-nucleotide polymorphisms (SNPs) at IGF-binding protein-3 (IGFBP3) were genotyped to find their associations with IGF-1 activity level and common clinical metabolic traits. PATIENTS AND METHODS We examined the associations of five SNPs at IGFBP3 with serum IGF-I and IGFBP-3 levels, as well as with obesity-related metabolic traits in 981 Hong Kong Chinese adolescents. Factor analysis was used to reduce the intercorrelated variables to five factor scores indicating body composition, blood pressure, IGF-I activity, triglyceride (TG)+high-density lipoprotein cholesterol (HDL-C) and total cholesterol (TC)+low-density lipoprotein cholesterol (LDL-C) factor scores. RESULTS There was a strong association between the -202A/C polymorphism (rs2854744) and IGF-I activity (P=1.2 x 10(-6)) and TC+LDL-C factor scores (P=0.0085), corrected for age and sex. The C allele was associated with decreased IGFBP-3 levels (P=1.21 x 10(-13)), increased IGF-I/IGFBP-3 molar ratio (P=5.22 x 10(-6)) and decreased LDL-C (P=0.020). There was also a significant association between a G/A polymorphism at the 3' flanking sequence (rs13223993) of the IGFBP3 gene and the TG+HDL-C factor score (P=0.0013). The minor A allele carriers of rs13223993 had a lower HDL-C (P=0.0067) level and a tendency toward a high TG level. Haplotype analysis did not increase the significance of associations between single SNPs and phenotypes. CONCLUSION Our results support the function of IGFBP3 gene polymorphisms in modulating IGF-I activity and lipid levels in adolescents. Given the prognostic significance of IGF-I, IGFBPs and lipids on risk of diabetes, obesity and cancer, long-term studies are required to clarify the clinical meaning of these findings.
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Affiliation(s)
- J L Y Mong
- Department of Biochemistry, The Chinese University of Hong Kong, The Prince of Wales Hospital, Shatin, Hong Kong SAR, China
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Wang Y, Luk AOY, Ma RCW, So WY, Tam CHT, Ng MCY, Yang X, Baum L, Lam V, Tong PCY, Chan JCN. Independent predictive roles of eotaxin Ala23Thr, paraoxonase 2 Ser311Cys and beta-adrenergic receptor Trp64Arg polymorphisms on cardiac disease in Type 2 Diabetes--an 8-year prospective cohort analysis of 1297 patients. Diabet Med 2010; 27:376-83. [PMID: 20536507 DOI: 10.1111/j.1464-5491.2010.02980.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To examine the independent and joint effects of multiple genetic variants on a cardiac end-point in an 8-year prospective study of a Chinese diabetic cohort. METHODS Seventy-seven single nucleotide polymorphisms (SNPs) of 53 candidate genes for inflammation, thrombosis, vascular tone regulation and lipid metabolism were genotyped in 1297 Chinese patients with no prior history of coronary heart disease (CHD) or heart failure at baseline. Cardiac end-point was defined by the occurrence of CHD and/or heart failure. RESULTS In Cox regression model, after adjustment for baseline confounding variables including age, sex, smoking status, duration of diabetes, glycaemic control, lipid levels, waist circumference, blood pressure, albuminuria and estimated glomerular filtration rate, genetic variants, including Ala/Ala of SCYA11 (eotaxin) Ala23Thr, Cys/Cys or Cys/Ser of PON2 (paraoxonase 2) Ser311Cys and Arg/Arg of ADRB3 (beta3-adrenergic receptor) Trp64Arg, were independently associated with incident cardiac end-point, with respective hazard ratios (95% confidence interval) of 1.70 (1.10-2.61, P=0.037), 1.42 (1.08-1.88, P=0.013) and 3.84 (1.18-12.50, P=0.025). Analysis of the joint effect of the risk alleles showed significant increased risk of the cardiac end-point with increasing number of risk alleles (P<0.001). The adjusted risk for the cardiac end-point was 4.11 (P=0.002) for patients carrying four risk alleles compared with those carrying one or no risk allele. CONCLUSIONS The independent risk conferred by genetic variants encoding pathways such as inflammation and lipid metabolism, not adequately reflected by conventional biomarkers, may identify high-risk individuals for intensified control of modifiable risk factors.
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Affiliation(s)
- Y Wang
- Department of Medicine & Therapeutics, The Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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