PMID- 30487812 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 1664-8021 (Print) IS - 1664-8021 (Electronic) IS - 1664-8021 (Linking) VI - 9 DP - 2018 TI - Ethnicity-Specific Association Between Ghrelin Leu72Met Polymorphism and Type 2 Diabetes Mellitus Susceptibility: An Updated Meta-Analysis. PG - 541 LID - 10.3389/fgene.2018.00541 [doi] LID - 541 AB - Background: The Leu72Met polymorphism of ghrelin gene has been associated with genetic predisposition to type 2 diabetes mellitus (T2DM), while conclusions remain conflicting. Hence, we performed this updated meta-analysis to clarify the association between Leu72Met polymorphism and T2DM susceptibility. Methods: Six electronic databases were consulted for articles published before 1 January, 2018. Pooled odds ratios (OR) and 95% confidence intervals (CI) were calculated under five genetic models to assess this association. We used I (2)-test and Q statistics to measure heterogeneity across the included studies. Subgroup analyses and publication bias were also performed. Results: Thirteen case-control studies involving 4720 T2DM patients and 4206 controls were included in this meta-analysis. The overall results using fixed-effects models showed that Leu72Met polymorphism was significantly associated with an increased risk of T2DM under homozygous model (OR = 1.307, 95%CI 1.001-1.705, p = 0.049). Further subgroup analyses stratified by ethnicity revealed that the risk for T2DM was only increased in Asians (homozygous model: OR = 1.335, 95%CI 1.014-1.758, p = 0.040), while decreased in Caucasians (dominant model: OR = 0.788, 95%CI 0.635-0.978, p = 0.030; heterozygous model: OR = 0.779, 95%CI 0.626-0.969, p = 0.025; allelic model: OR = 0.811, 95%CI 0.661-0.995, p = 0.045). Funnel plots were basically symmetrical, and all p-values of Egger's test under five genetic models were >0.050, which indicated no evidence of publication bias. Conclusions: Our results demonstrate that the Leu72Met polymorphism of ghrelin gene may be protective against T2DM in Caucasians, while predisposing to T2DM in Asians. FAU - Huang, Rong AU - Huang R AD - Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China. AD - Medical School of Southeast University, Nanjing, China. FAU - Tian, Sai AU - Tian S AD - Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China. FAU - Cai, Rongrong AU - Cai R AD - Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China. FAU - Sun, Jie AU - Sun J AD - Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China. FAU - Shen, Yanjue AU - Shen Y AD - Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China. FAU - Wang, Shaohua AU - Wang S AD - Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China. LA - eng PT - Journal Article DEP - 20181114 PL - Switzerland TA - Front Genet JT - Frontiers in genetics JID - 101560621 PMC - PMC6246653 OTO - NOTNLM OT - Leu72Met OT - ghrelin OT - meta-analysis OT - polymorphism OT - type 2 diabetes mellitus EDAT- 2018/11/30 06:00 MHDA- 2018/11/30 06:01 PMCR- 2018/11/14 CRDT- 2018/11/30 06:00 PHST- 2018/02/22 00:00 [received] PHST- 2018/10/26 00:00 [accepted] PHST- 2018/11/30 06:00 [entrez] PHST- 2018/11/30 06:00 [pubmed] PHST- 2018/11/30 06:01 [medline] PHST- 2018/11/14 00:00 [pmc-release] AID - 10.3389/fgene.2018.00541 [doi] PST - epublish SO - Front Genet. 2018 Nov 14;9:541. doi: 10.3389/fgene.2018.00541. eCollection 2018.