alexa Single-nucleotide polymorphisms in the KCNN3 gene associate with preterm birth.
Reproductive Medicine

Reproductive Medicine

Gynecology & Obstetrics

Author(s): Day LJ, Schaa KL, Ryckman KK, Cooper M, Dagle JM

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The objectives were to determine whether single-nucleotide polymorphisms (SNPs) in KCNN3 (encodes the small conductance calcium-activated potassium channel subfamily N, member 3), associate with preterm birth (PTB). In all, 602 preterm families with at least 1 preterm (<37 weeks gestation) infant were studied: DNA from the infant and one or both parents were genotyped for 16 SNPs in KCNN3. A region of interest within KCNN3 was sequenced in 512 Caucasian non-Hispanic mothers (412 with preterm deliveries;100 who delivered at term). Family-based association testing was used for genotyping analysis; Fisher exact test was used for sequencing analysis. Six SNPs (rs1218585, rs4845396, rs12058931, rs1218568, rs6426985, and rs4845394) were associated with PTB (all Ps < .05). These variations were all located within the intronic region between exons 1 and 2. Maternal sequencing revealed an association of 3 SNPs with spontaneous PTB; rs1218585 (P = .007), rs1218584 (P = .05), and a novel SNP at chromosome1:153099353 (P = .02). Polymorphisms in KCNN3 are associated with PTB and investigation into the functional significance of these allelic changes is warranted.

This article was published in Reprod Sci. and referenced in Gynecology & Obstetrics

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