Abstract
Background: Previous studies have examined the roles of three polymorphisms (rs3851179, rs541458, and rs592297) of the PICALM gene in susceptibility to Alzheimer's disease (AD) with inconclusive findings.
Objective: We performed a meta-analysis to explore whether these three polymorphisms in the PICALM gene were associated with susceptibility to AD.
Methods: Bibliographical searches were conducted in the PubMed, Embase, Web of Science, and China National Knowledge Infrastructure (CNKI) databases. Summary Odds Ratios (ORs) with 95% Confidence Intervals (CIs) were used to assess the strength of association in a random effects model. Potential sources of heterogeneity were identified by subgroup and meta-regression analyses.
Results: Twenty studies (9,017 cases and 15,448 controls) on rs3851179, 12 studies (8,077 cases and 12,022 controls) on rs541458, and 4 studies (2,106 cases and 2,234 controls) on rs592297 were considered eligible for meta-analyses. For both rs3851179 and rs541458, the overall ORs were significant under all genetic models with mild heterogeneity. Compared with G carriers, A carriers of rs3851179 were associated with a decreased risk of AD (OR = 0.88; 95% CI 0.84, 0.91, P for Z-test <0.001, I2 = 0.0%). Compared with T carriers, C carriers of rs541458 were inversely associated with AD risk (OR = 0.86; 95% CI 0.81, 0.92, P for Z-test <0.001, I2 = 39.5%). No association was observed for rs592297. Subgroup and meta-regression analyses indicated that the protective effect of the rs541458 C allele was observed only among Caucasians, not among Asians (P for interaction: 0.021~<0.001).
Conclusion: rs3851179 and rs541458 appear to be associated with decreased AD risk. The null associations for rs592297 with AD risk need further confirmation with a larger number of participants.
Keywords: Alzheimer's disease, single nucleotide polymorphism, PICALM gene, meta-analysis, epidemiology, odds ratio.
[http://dx.doi.org/10.1016/j.jalz.2007.04.381] [PMID: 19595937]
[http://dx.doi.org/10.1016/S0140-6736(96)10203-8] [PMID: 9167474]
[http://dx.doi.org/10.1371/journal.pone.0044252] [PMID: 22952941]
[http://dx.doi.org/10.1007/s12035-014-8878-3] [PMID: 25186232]
[http://dx.doi.org/10.1038/ng.440] [PMID: 19734902]
[http://dx.doi.org/10.1111/j.1469-1809.2012.00727.x] [PMID: 22943764]
[http://dx.doi.org/10.1007/s12035-015-9546-y] [PMID: 26611835]
[http://dx.doi.org/10.1016/j.ajp.2016.12.017] [PMID: 28558900]
[http://dx.doi.org/10.1007/s12017-017-8444-z] [PMID: 28567584]
[http://dx.doi.org/10.1007/s12035-014-9015-z] [PMID: 25452228]
[PMID: 26434199]
[http://dx.doi.org/10.1371/journal.pone.0144898] [PMID: 26680604]
[http://dx.doi.org/10.1016/j.neurobiolaging.2013.09.025] [PMID: 24176626]
[http://dx.doi.org/10.1037/1082-989X.8.3.243] [PMID: 14596489]
[http://dx.doi.org/10.1093/aje/kwr025] [PMID: 21576320]
[http://dx.doi.org/10.1037/1082-989X.6.3.203] [PMID: 11570228]
[http://dx.doi.org/10.1016/j.mgene.2015.04.003] [PMID: 26042205]
[http://dx.doi.org/10.1002/gepi.20335] [PMID: 18449919]
[http://dx.doi.org/10.1016/S0304-3959(99)00302-4] [PMID: 10781914]
[http://dx.doi.org/10.1136/bmj.327.7414.557] [PMID: 12958120]
[http://dx.doi.org/10.1002/sim.1186] [PMID: 12111919]
[http://dx.doi.org/10.1016/0197-2456(86)90046-2] [PMID: 3802833]
[http://dx.doi.org/10.1136/bmj.d549] [PMID: 21310794]
[http://dx.doi.org/10.1136/bmj.315.7109.629] [PMID: 9310563]
[http://dx.doi.org/10.1016/j.neurobiolaging.2012.08.015]
[http://dx.doi.org/10.1007/s12017-013-8225-2] [PMID: 23572399]
[http://dx.doi.org/10.1007/s12031-014-0377-5] [PMID: 25022885]
[http://dx.doi.org/10.1007/s12017-015-8376-4] [PMID: 26553058]
[http://dx.doi.org/10.1007/s11033-014-3806-1] [PMID: 25359311]
[http://dx.doi.org/10.5114/ninp.2013.33825] [PMID: 23650005]
[http://dx.doi.org/10.1097/YPG.0b013e3283586215] [PMID: 22935915]
[http://dx.doi.org/10.1016/j.jns.2010.09.027] [PMID: 20951388]
[http://dx.doi.org/10.3233/JAD-2011-101791] [PMID: 21297266]
[http://dx.doi.org/10.3233/JAD-2011-101917] [PMID: 21358043]
[PMID: 28631188]
[http://dx.doi.org/10.1016/j.neurobiolaging.2010.11.022]
[http://dx.doi.org/10.1016/j.neurobiolaging.2013.09.014]
[http://dx.doi.org/10.1371/journal.pone.0091242] [PMID: 24618820]
[http://dx.doi.org/10.1001/archgenpsychiatry.2010.196] [PMID: 21300948]
[http://dx.doi.org/10.1186/s12868-016-0288-1] [PMID: 27430330]