Hansen KE, Johnson MG, Carter TC, Mayer J, Keuler NS, Blank RD. The -839(A/C) Polymorphism in the
ECE1 Isoform b Promoter Associates With Osteoporosis and Fractures.
J Endocr Soc 2019;
3:2041-2050. [PMID:
31637345 PMCID:
PMC6795020 DOI:
10.1210/js.2019-00057]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 07/09/2019] [Indexed: 11/19/2022] Open
Abstract
Context
We previously found that variation in a quantitative trait locus, including the gene-encoding endothelin-converting enzyme 1 (Ece1), accounted for 40% of the variance in bone biomechanics and bone mineral density (BMD) in an intercross of recombinant congenic mouse strains.
Objective
We hypothesized that single nucleotide polymorphisms (SNPs) within the human ECE1 isoform b promoters, at ECE1 b -338(G/T) and ECE1 b -839(A/C), would associate with osteoporosis in postmenopausal women.
Design
We genotyped DNA for the ECE1 -338(G/T) and -839(A/C) SNPs.
Setting
A community medical center.
Participants
Postmenopausal women (3564) with ≥1 dual-energy X-ray absorptiometry scan ≥60 years of age.
Main Outcome Measures
BMD, osteoporosis, and clinical fractures.
Results
In multivariate models controlling for age, weight, healthcare duration, and tobacco, the CC genotype reduced the odds of lifetime fracture (OR 0.33, 95% CI 0.12, 0.87) and fracture ≥50 years of age (OR 0.31, 95% CI 0.11, 0.87), whereas the AC genotype increased odds of osteoporosis (OR 1.34, 95% CI 1.02 1.78) relative to the AA genotype. However, when controlling the false-discovery rate, findings were no longer significant. We found no consistent relationship between the ECE1 b -338(G/T) and study outcomes.
Conclusions
The CC genotype was associated with fewer fractures, whereas the AC genotype was associated with osteoporosis. Our small sample size and few minorities are study limitations. Findings should be tested in another cohort to confirm a link between the ECE1 -839(A/C) SNPs and osteoporosis.
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