Association of a Polygenic Risk Score With Osteoporosis in People Living With HIV: The Swiss HIV Cohort Study

Johannes M Schwenke1, Christian W Thorball2,3, Isabella C Schoepf1,4

  • 1University Department of Medicine and Infectious Diseases Service, Kantonsspital Baselland, University of Basel, Bruderholz.

Insights

A polygenic risk score (PRS) is linked to osteoporosis in people with HIV (PLWH). This genetic risk factor is associated with low bone mineral density (BMD) independent of traditional risk factors.

Area of Science:

  • Genetics
  • Bone Metabolism
  • Infectious Diseases

Background:

  • Bone mineral density (BMD) loss is a concern for people with HIV (PLWH).
  • The association between polygenic risk scores (PRS) and low BMD in PLWH remains uninvestigated.

Purpose of the Study:

  • To determine if a PRS is associated with low BMD in PLWH.
  • To assess the PRS's independent contribution to osteoporosis risk in PLWH.

Main Methods:

  • Utilized data from the Swiss HIV Cohort Study (2011-2020).
  • Included 438 participants of European descent with multiple dual x-ray absorptiometry (DXA) measurements.
  • Calculated a genome-wide PRS from 9413 single-nucleotide polymorphisms associated with low BMD.

Main Results:

  • Participants with an unfavorable osteoporosis PRS showed significantly higher odds of osteoporosis.
  • Osteoporosis odds ratios (ORs) for the top vs. bottom PRS quintile were 4.76 (univariable) and 4.13 (multivariable).
  • PRS association remained significant after adjusting for traditional and HIV-related factors, including tenofovir disoproxil fumarate exposure.

Conclusions:

  • A BMD-associated PRS is independently associated with osteoporosis in PLWH.
  • Genetic predisposition, assessed by PRS, plays a role in osteoporosis development in this population.
  • Findings highlight the importance of genetic factors in managing bone health in people with HIV.
Abstract

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