@article {7681, title = {Trans-ethnic Evaluation Identifies Novel Low Frequency Loci Associated with 25-Hydroxyvitamin D Concentrations.}, journal = {J Clin Endocrinol Metab}, year = {2018}, month = {2018 Jan 09}, abstract = {

Context: Vitamin D inadequacy is common in the adult population of the United States. While the genetic determinants underlying vitamin D inadequacy have been studied in people of European ancestry, less is known in Hispanic or African ancestry populations.

Objective: The TRANSCEN-D (TRANS-ethniC Evaluation of vitamiN D GWAS) consortium was assembled to replicate genetic associations with 25-hydroxyvitamin D (25(OH)D) concentrations from the meta-analyses of European ancestry (SUNLIGHT) and to identify novel genetic variants related to vitamin D concentrations in African and Hispanic ancestries.

Design: Ancestry-specific (Hispanic and African) and trans-ethnic (Hispanic, African and European) meta-analyses were performed using the METAL software.

Patients or Other Participants: In total, 8,541 African-American and 3,485 Hispanic-American (from North America) participants from twelve cohorts, and 16,124 European participants from SUNLIGHT were included in the study.

Main Outcome Measure(s): Blood concentrations of 25(OH)D were measured for all participants.

Results: Ancestry-specific analyses in African and Hispanic Americans replicated SNPs in GC (2 and 4 SNPs, respectively). A potentially novel SNP (rs79666294) near the KIF4B gene was identified in the African-American cohort. Trans-ethnic evaluation replicated GC and DHCR7 region SNPs. Additionally, the trans-ethnic analyses revealed novel SNPs rs719700 and rs1410656 near the ANO6/ARID2 and HTR2A genes, respectively.

Conclusions: Ancestry-specific and trans-ethnic GWAS of 25(OH)D confirmed findings in GC and DHCR7 for African and Hispanic American samples and revealed novel findings near KIF4B, ANO6/ARID2, and HTR2A. The biological mechanisms that link these regions with 25(OH)D metabolism require further investigation.

}, issn = {1945-7197}, doi = {10.1210/jc.2017-01802}, author = {Hong, Jaeyoung and Hatchell, Kathryn E and Bradfield, Jonathan P and Andrew, Bjonnes and Alessandra, Chesi and Chao-Qiang, Lai and Langefeld, Carl D and Lu, Lingyi and Lu, Yingchang and Lutsey, Pamela L and Musani, Solomon K and Nalls, Mike A and Robinson-Cohen, Cassianne and Roizen, Jeffery D and Saxena, Richa and Tucker, Katherine L and Ziegler, Julie T and Arking, Dan E and Bis, Joshua C and Boerwinkle, Eric and Bottinger, Erwin P and Bowden, Donald W and Gilsanz, Vincente and Houston, Denise K and Kalkwarf, Heidi J and Kelly, Andrea and Lappe, Joan M and Liu, Yongmei and Michos, Erin D and Oberfield, Sharon E and Palmer, Nicholette D and Rotter, Jerome I and Sapkota, Bishwa and Shepherd, John A and Wilson, James G and Basu, Saonli and de Boer, Ian H and Divers, Jasmin and Freedman, Barry I and Grant, Struan F A and Hakanarson, Hakon and Harris, Tamara B and Kestenbaum, Bryan R and Kritchevsky, Stephen B and Loos, Ruth J F and Norris, Jill M and Norwood, Arnita F and Ordovas, Jose M and Pankow, James S and Psaty, Bruce M and Sanhgera, Dharambir K and Wagenknecht, Lynne E and Zemel, Babette S and Meigs, James and Dupuis, Jos{\'e}e and Florez, Jose C and Wang, Thomas and Liu, Ching-Ti and Engelman, Corinne D and Billings, Liana K} }