Sleep disordered breathing and fibroblast growth factor 23 in the Hispanic Community Health Study/Study of Latinos.

Published

Journal Article

Preclinical data suggest that hypoxia stimulates fibroblast growth factor 23 (FGF23) transcription and cleavage in osteocytes, resulting in elevated circulating c-terminal (cFGF23) levels but normal intact FGF23 (iFGF23) levels. We conducted a case-control study within the Hispanic Community Health Study/Study of Latinos to investigate whether sleep disordered breathing, as a model of hypoxemia, is independently associated with elevated cFGF23 levels in the general population and with elevated cFGF23 and iFGF23 levels in patients with chronic kidney disease (CKD), in whom FGF23 cleavage may be impaired. Cases (n = 602) had severe sleep disordered breathing defined as an apnea/hypopnea index (AHI) of ≥30. Controls without severe sleep disordered breathing (n = 602) were matched for sex and CKD stage. The median AHI in the cases was 45.8 (IQR 35.5-62.5) compared to 2.6 (IQR 0.6-8.2) in the controls. Cases had higher cFGF23 levels than controls (66.2 RU/mL, IQR 52.8-98.4 vs. 61.2 RU/mL, IQR 49.5-80.1, p value <0.001). There were no differences in iFGF23 levels between cases and controls. In adjusted linear regression and multinomial regression analyses, body mass index attenuated the relationship between severe sleep disordered breathing and cFGF23 levels. No significant relationships were seen in analyses of severe sleep disordered breathing and iFGF23 levels or in analyses of iFGF23 and cFGF23 stratified by CKD status. Additional studies using other models of intermittent and chronic hypoxia are needed to confirm whether hypoxia stimulates FGF23 transcription in humans and to determine the impact on iFGF23 levels in CKD.

Full Text

Duke Authors

Cited Authors

  • Mehta, R; Cai, X; Hodakowski, A; Thyagarajan, B; Zeng, D; Zee, PC; Wohlgemuth, WK; Redline, S; Lash, JP; Wolf, M; Isakova, T

Published Date

  • September 2018

Published In

Volume / Issue

  • 114 /

Start / End Page

  • 278 - 284

PubMed ID

  • 29986841

Pubmed Central ID

  • 29986841

Electronic International Standard Serial Number (EISSN)

  • 1873-2763

Digital Object Identifier (DOI)

  • 10.1016/j.bone.2018.06.024

Language

  • eng

Conference Location

  • United States