TY - JOUR
T1 - Association study of Wnt signaling pathway genes in bipolar disorder
AU - Zandi, Peter P.
AU - Belmonte, Pamela L.
AU - Willour, Virginia L.
AU - Goes, Fernando S.
AU - Badner, Judith A.
AU - Simpson, Sylvia G.
AU - Gershon, Elliot S.
AU - McMahon, Francis J.
AU - DePaulo, J. Raymond
AU - Potash, James B.
AU - Steele, J.
AU - Pearl, J.
AU - Kassem, L.
AU - Lopez, V.
AU - MacKinnon, D.
AU - Miller, E.
AU - Toolan, J.
AU - Schulze, T.
AU - Byerley, William
AU - Coryell, William
AU - Kelsoe, John
AU - Rice, John
AU - Nurnberger, John
PY - 2008/7
Y1 - 2008/7
N2 - Context: The Wnt signaling pathways promote cell growth and are best known for their role in embryogenesis and cancer. Several lines of evidence suggest that these pathways might also be involved in bipolar disorder. Objective: To test for an association between candidate genes in the Wnt signaling pathways and disease susceptibility in a family-based bipolar disorder study. Design: Two hundred twenty-seven tagging single-nucleotide polymorphisms (SNPs) from 34 genes were successfully genotyped. Initial results led us to focus on the gene PPARD, in which we genotyped an additional 13 SNPs for follow-up. Setting: Nine academic medical centers in the United States. Participants: Five hundred fifty-four offspring with bipolar disorder and their parents from 317 families. Main Outcome Measures: Family-based association using FBAT and HBAT (http://www.biostat.harvard.edu/∼fbat/default.html; Harvard School of Public Health, Boston, Massachusetts). Exploratory analyses testing for interactions of PPARD SNPs with clinical covariates and with other Wnt genes were conducted with GENASSOC (Stata Corp, College Station, Texas). Results: In the initial analysis, the most significantly associated SNP was rs2267665 in PPARD (nominal P<.001). This remained significant at P=.05 by permutation after accounting for all SNPs tested. Additional genotyping in PPARD yielded 4 SNPs in 1 haplotype block that were significantly associated with bipolar disorder (P<.01), the most significant being rs9462082 (P<.001). Exploratory analyses revealed significant evidence (P<.01) for interactions of rs9462082 with poor functioning on the Global Assessment Scale (odds ratio [OR], 3.36; 95% confidence interval [CI], 1.85-6.08) and with SNPs in WNT2B (rs3790606: OR, 2.56; 95% CI, 1.67-4.00) and WNT7A (rs4685048: OR, 1.79; 95% CI, 1.23-2.63). Conclusions: We found evidence for association of bipolar disorder with PPARD, a gene in the Wnt signaling pathway. The consistency of this result with one from the Wellcome Trust Case-Control Consortium encourages further study. If the finding can be confirmed in additional samples, it may illuminate a new avenue for understanding the pathogenesis of severe bipolar disorder and developing more effective treatments. copy;2008 American Medical Association, All rights reserved.
AB - Context: The Wnt signaling pathways promote cell growth and are best known for their role in embryogenesis and cancer. Several lines of evidence suggest that these pathways might also be involved in bipolar disorder. Objective: To test for an association between candidate genes in the Wnt signaling pathways and disease susceptibility in a family-based bipolar disorder study. Design: Two hundred twenty-seven tagging single-nucleotide polymorphisms (SNPs) from 34 genes were successfully genotyped. Initial results led us to focus on the gene PPARD, in which we genotyped an additional 13 SNPs for follow-up. Setting: Nine academic medical centers in the United States. Participants: Five hundred fifty-four offspring with bipolar disorder and their parents from 317 families. Main Outcome Measures: Family-based association using FBAT and HBAT (http://www.biostat.harvard.edu/∼fbat/default.html; Harvard School of Public Health, Boston, Massachusetts). Exploratory analyses testing for interactions of PPARD SNPs with clinical covariates and with other Wnt genes were conducted with GENASSOC (Stata Corp, College Station, Texas). Results: In the initial analysis, the most significantly associated SNP was rs2267665 in PPARD (nominal P<.001). This remained significant at P=.05 by permutation after accounting for all SNPs tested. Additional genotyping in PPARD yielded 4 SNPs in 1 haplotype block that were significantly associated with bipolar disorder (P<.01), the most significant being rs9462082 (P<.001). Exploratory analyses revealed significant evidence (P<.01) for interactions of rs9462082 with poor functioning on the Global Assessment Scale (odds ratio [OR], 3.36; 95% confidence interval [CI], 1.85-6.08) and with SNPs in WNT2B (rs3790606: OR, 2.56; 95% CI, 1.67-4.00) and WNT7A (rs4685048: OR, 1.79; 95% CI, 1.23-2.63). Conclusions: We found evidence for association of bipolar disorder with PPARD, a gene in the Wnt signaling pathway. The consistency of this result with one from the Wellcome Trust Case-Control Consortium encourages further study. If the finding can be confirmed in additional samples, it may illuminate a new avenue for understanding the pathogenesis of severe bipolar disorder and developing more effective treatments. copy;2008 American Medical Association, All rights reserved.
UR - http://www.scopus.com/inward/record.url?scp=46849110574&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=46849110574&partnerID=8YFLogxK
U2 - 10.1001/archpsyc.65.7.785
DO - 10.1001/archpsyc.65.7.785
M3 - Article
C2 - 18606951
AN - SCOPUS:46849110574
SN - 0003-990X
VL - 65
SP - 785
EP - 793
JO - Archives of general psychiatry
JF - Archives of general psychiatry
IS - 7
ER -