PMID- 29044734 OWN - NLM STAT- MEDLINE DCOM- 20180920 LR - 20180920 IS - 1439-0272 (Electronic) IS - 0303-4569 (Linking) VI - 50 IP - 3 DP - 2018 Apr TI - Association of androgen receptor gene CAG and GGN repeat polymorphism with cryptorchidism: A meta-analysis. LID - 10.1111/and.12909 [doi] AB - Researches on association between variations in the androgen receptor (AR) gene repeat polymorphisms and cryptorchidism (CO) had conflicting results. The aim of this meta-analysis was to analyse the potential effects of AR CAG and/or GGN repeat polymorphism on CO. Studies were independently appraised by two investigators on PubMed, Web of Science, EBSCO databases and Foreign Medical Retrieval System. Case-control studies with measurement of CAG and/or GGN repeat length were included. Weighted mean difference (WMD) and 95% confidence intervals (CIs) for the CAG or GGN repeat polymorphism and CO were calculated. Five reports were included in this analysis. Overall, no difference was identified between patients and fertile men in CAG repeat length. However, when the CO was divided into unilateral and bilateral, longer CAG repeat region was significantly associated with CO in bilateral group (WMD = 0.74; 95% CI, 0.01-1.47; p < .05). In addition, GGN lengths were significantly higher in patients compared with those in controls (WMD = 1.17; 95% CI, 0.28-2.06; p < .05). No obvious effect was found in the GGN length when compared unilateral or bilateral group with control respectively. The results in this meta-analysis indicated that AR CAG and GGN repeat polymorphisms may be an important pathogenesis of CO. CI - (c) 2017 Blackwell Verlag GmbH. FAU - Wang, Qi AU - Wang Q AD - School of Public Health, Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Ge, Xing AU - Ge X AD - School of Public Health, Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Wang, Heng-Xue AU - Wang HX AD - School of Public Health, Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Shi, Qiao-Mei AU - Shi QM AD - School of Public Health, Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Ding, Zhen AU - Ding Z AD - School of Public Health, Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Xu, Li-Chun AU - Xu LC AUID- ORCID: 0000-0001-7694-0451 AD - School of Public Health, Xuzhou Medical University, Xuzhou, Jiangsu, China. LA - eng PT - Journal Article PT - Meta-Analysis DEP - 20171018 PL - Germany TA - Andrologia JT - Andrologia JID - 0423506 RN - 0 (Receptors, Androgen) SB - IM MH - Cryptorchidism/*genetics MH - Genetic Association Studies MH - *Genetic Predisposition to Disease MH - Humans MH - Male MH - Receptors, Androgen/*genetics MH - *Trinucleotide Repeats OTO - NOTNLM OT - CAG repeat polymorphism OT - GGN repeat polymorphism OT - cryptorchidism OT - meta-analysis EDAT- 2017/10/19 06:00 MHDA- 2018/09/21 06:00 CRDT- 2017/10/19 06:00 PHST- 2017/08/18 00:00 [accepted] PHST- 2017/10/19 06:00 [pubmed] PHST- 2018/09/21 06:00 [medline] PHST- 2017/10/19 06:00 [entrez] AID - 10.1111/and.12909 [doi] PST - ppublish SO - Andrologia. 2018 Apr;50(3). doi: 10.1111/and.12909. Epub 2017 Oct 18.