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Article: Brain-derived neurotrophic factor gene variants and obesity in former smokers

TitleBrain-derived neurotrophic factor gene variants and obesity in former smokers
Authors
KeywordsObesity
Central obesity
Smoking cessation
BDNF
Issue Date2021
PublisherBioMed Central Ltd. The Journal's web site is located at http://www.biomedcentral.com/bmcgenomics/
Citation
BMC Genomics, 2021, v. 22 n. 1, p. article no. 668 How to Cite?
AbstractObjective: From genome-wide association studies, brain-derived neurotrophic factor (BDNF) locus on chromosome 11 was the only SNP associated with both smoking and body mass index (BMI) in European, African and Asian population. This study aims to explore the unique genetic predisposition to obesity in former smokers by examining the effects of BDNF on BMI and waist circumference (WC). Methods: The study design is case-control study with a cohort validation in supplementary. We included 15,072 ethnic Chinese participants in the Guangzhou Biobank Cohort Study (GBCS) with data of four BDNF SNPs related to both BMI and smoking behavior. We used baseline smoke exposure data in 2003–2007 and follow-up outcomes of general obesity (by BMI) and central obesity (WC) in 2008–2012. Odds ratios (ORs) and 95% confidence intervals (CIs) for general obesity and central obesity associated with these SNPs were derived from logistic regression. Results: Of 15,072 participants (3169 men and 11,903 women), 1664 (11.0%) had general and 7868 (52.2%) had central obesity. In 1233 former smokers, the rs6265 GG, versus AA, genotype was associated with higher risks of general obesity (OR = 1.79, 95% CI = 1.06–3.01) and central obesity (OR = 2.08, 95% CI = 1.47–2.92) after adjustment. These associations were not significant in never or current smokers. In former heavy (≥20 cigarettes/day) smokers, the rs6265 GG genotype showed a higher odds for general obesity (OR = 2.15, 95% CI = 1.05–4.40), while no association was found in former light (1–9 cigarettes/day) smokers. Similar results were found for the association of rs6265 with central obesity and for the associations of other two BDNF SNPs (rs4923457 and rs11030104) with both general and central obesity. Conclusions: We firstly identified the genetic predisposition (BDNF SNPs) to general and central obesity in former smokers, particularly in former heavy smokers. The different associations of the SNPs for general/central obesity in different smoke exposure groups may be related to the competitive performance of the sites and epigenetic modification, which needs further study.
Persistent Identifierhttp://hdl.handle.net/10722/305228
ISSN
2023 Impact Factor: 3.5
2023 SCImago Journal Rankings: 1.047
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, SS-
dc.contributor.authorHe, Y-
dc.contributor.authorXu, L-
dc.contributor.authorJin, Y-
dc.contributor.authorZhang, WS-
dc.contributor.authorJiang, CQ-
dc.contributor.authorCheng, KK-
dc.contributor.authorLam, TH-
dc.date.accessioned2021-10-20T10:06:27Z-
dc.date.available2021-10-20T10:06:27Z-
dc.date.issued2021-
dc.identifier.citationBMC Genomics, 2021, v. 22 n. 1, p. article no. 668-
dc.identifier.issn1471-2164-
dc.identifier.urihttp://hdl.handle.net/10722/305228-
dc.description.abstractObjective: From genome-wide association studies, brain-derived neurotrophic factor (BDNF) locus on chromosome 11 was the only SNP associated with both smoking and body mass index (BMI) in European, African and Asian population. This study aims to explore the unique genetic predisposition to obesity in former smokers by examining the effects of BDNF on BMI and waist circumference (WC). Methods: The study design is case-control study with a cohort validation in supplementary. We included 15,072 ethnic Chinese participants in the Guangzhou Biobank Cohort Study (GBCS) with data of four BDNF SNPs related to both BMI and smoking behavior. We used baseline smoke exposure data in 2003–2007 and follow-up outcomes of general obesity (by BMI) and central obesity (WC) in 2008–2012. Odds ratios (ORs) and 95% confidence intervals (CIs) for general obesity and central obesity associated with these SNPs were derived from logistic regression. Results: Of 15,072 participants (3169 men and 11,903 women), 1664 (11.0%) had general and 7868 (52.2%) had central obesity. In 1233 former smokers, the rs6265 GG, versus AA, genotype was associated with higher risks of general obesity (OR = 1.79, 95% CI = 1.06–3.01) and central obesity (OR = 2.08, 95% CI = 1.47–2.92) after adjustment. These associations were not significant in never or current smokers. In former heavy (≥20 cigarettes/day) smokers, the rs6265 GG genotype showed a higher odds for general obesity (OR = 2.15, 95% CI = 1.05–4.40), while no association was found in former light (1–9 cigarettes/day) smokers. Similar results were found for the association of rs6265 with central obesity and for the associations of other two BDNF SNPs (rs4923457 and rs11030104) with both general and central obesity. Conclusions: We firstly identified the genetic predisposition (BDNF SNPs) to general and central obesity in former smokers, particularly in former heavy smokers. The different associations of the SNPs for general/central obesity in different smoke exposure groups may be related to the competitive performance of the sites and epigenetic modification, which needs further study.-
dc.languageeng-
dc.publisherBioMed Central Ltd. The Journal's web site is located at http://www.biomedcentral.com/bmcgenomics/-
dc.relation.ispartofBMC Genomics-
dc.rightsBMC Genomics. Copyright © BioMed Central Ltd.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectObesity-
dc.subjectCentral obesity-
dc.subjectSmoking cessation-
dc.subjectBDNF-
dc.titleBrain-derived neurotrophic factor gene variants and obesity in former smokers-
dc.typeArticle-
dc.identifier.emailHe, Y: yaohe@hkucc.hku.hk-
dc.identifier.emailXu, L: linxu@hku.hk-
dc.identifier.emailZhang, WS: zhangws9@hku.hk-
dc.identifier.emailJiang, CQ: cqjiang@hkucc.hku.hk-
dc.identifier.emailCheng, KK: chengkk@hkucc.hku.hk-
dc.identifier.emailLam, TH: hrmrlth@hkucc.hku.hk-
dc.identifier.authorityXu, L=rp02030-
dc.identifier.authorityLam, TH=rp00326-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1186/s12864-021-07928-0-
dc.identifier.pmid34525971-
dc.identifier.pmcidPMC8442367-
dc.identifier.scopuseid_2-s2.0-85114873820-
dc.identifier.hkuros326670-
dc.identifier.volume22-
dc.identifier.issue1-
dc.identifier.spagearticle no. 668-
dc.identifier.epagearticle no. 668-
dc.identifier.isiWOS:000696201400001-
dc.publisher.placeUnited Kingdom-

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