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Background  Glomerular filtration rate (GFR) and urinary albumin excretion (UAE) are markers of kidney function that are known to be heritable. Many endocrine conditions have strong familial components. We tested for association between the Affymetrix GeneChip Human Mapping 100K single nucleotide polymorphism (SNP) set and measures of kidney function and endocrine traits.    Methods  Genotype information on the Affymetrix GeneChip Human Mapping 100K SNP set was available on 1345 participants. Serum creatinine and cystatin-C (cysC; n = 981) were measured at the seventh examination cycle (1998–2001); GFR (n = 1010) was estimated via the Modification of Diet in Renal Disease (MDRD) equation; UAE was measured on spot urine samples during the sixth examination cycle (1995–1998) and was indexed to urinary creatinine (n = 822). Thyroid stimulating hormone (TSH) was measured at the third and fourth examination cycles (1981–1984; 1984–1987) and mean value of the measurements were used (n = 810). Age-sex-adjusted and multivariable-adjusted residuals for these measurements were used in association with genotype data using generalized estimating equations (GEE) and family-based association tests (FBAT) models. We presented the results for association tests using additive allele model. We evaluated associations with 70,987 SNPs on autosomes with minor allele frequencies of at least 0.10, Hardy-Weinberg Equilibrium p-value ≥ 0.001, and call rates of at least 80%.    Results  The top SNPs associated with these traits using the GEE method were rs2839235 with GFR (p-value 1.6*10 -05 ), rs1158167 with cysC (p-value 8.5*10 -09 ), rs1712790 with UAE (p-value 1.9*10 -06 ), and rs6977660 with TSH (p-value 3.7*10 -06 ), respectively. The top SNPs associated with these traits using the FBAT method were rs6434804 with GFR(p-value 2.4*10 -5 ), rs563754 with cysC (p-value 4.7*10 -5 ), rs1243400 with UAE (p-value 4.8*10 -6 ), and rs4128956 with TSH (p-value 3.6*10 -5 ), respectively. Detailed association test results can be found at   . Four SNPs in or near the  CST 3 gene were highly associated with cysC levels (p-value 8.5*10 -09  to 0.007).    Conclusion  Kidney function traits and TSH are associated with SNPs on the Affymetrix GeneChip Human Mapping 100K SNP set. These data will serve as a valuable resource for replication as more SNPs associated with kidney function and endocrine traits are identified.

A genome-wide association for kidney function and endocrine-related traits in the NHLBI's Framingham Heart Study