ANK3 and CACNA1C-Missing genetic link for bipolar disorder and major depressive disorder in two German case-control samples

作者：Kloiber Stefan^*; Czamara Darina; Karbalai Nazanin; Mueller Myhsok Bertram; Hennings Johannes; Hol**oer Florian; Lucae Susanne

来源：Journal of Psychiatric Research, 2012, 46(8): 973-979.

DOI：10.1016/j.jpsychires.2012.04.017

• Depression
• Genetics
• Bipolar disorder
• CACNA1C
• ANK3

Recent genome-wide association studies (GWAS) and metaanalyses revealed genetic associations for ANK3 (ankyrin 3) and CACNA1C (alpha 1C subunit of the L-type voltage gated calcium channel) with bipolar disorder (BPD). Several findings from clinical, epidemiological, and genetic studies point towards a common biological background of BPD and major depressive disorder (MDD). We were interested whether this also applies for ANK3 and CACNA1C and tested associations of single nucleotide polymorphisms (SNPs) in these genes with MOD in two Caucasian case-control samples. Sample 1 (Munich Antidepressant Response Signature Project/MARS - MOD) consisted of 720 depressed inpatients and 542 psychiatric healthy controls. Sample 2 (unipolar recurrent depression (URD)) consisted of 827 patients with URD and 860 psychiatric healthy controls. After stringent quality control we analyzed 262 SNPs (sample 1) and 504 SNPs (sample 2) and imputed further 5771 SNPs (sample 1) and 5534 SNPs (sample 2) from Hapmap Phase 2 data in the ANK3 and CACNA1C gene regions. Additionally, a meta-analysis of both samples was performed. Several SNPs in both genes were nominally associated with MDD with the highest association in the 3'-region of ANK3 (rs10994143, nominal p = 3.3*10(-4)) in the metaanalysis of both samples. None of these results remained significant after correction for multiple testing. No association of MDD with SNPs previously reported in BPD studies could be detected. By analyzing the LD-structure, our highest associated SNPs could not be linked to the SNPs previously reported in BPD. Regarding ANK3 and CACNA1C, our findings do not support a strong genetic link between BPD and MOD for these two genes.

• 出版日期2012-8