Downregulation of Gnas, Got2 and Snord32a following tenofovir exposure of primary osteoclasts

Iwen F. Grigsby, Lan Pham, Raj Gopalakrishnan, Louis M. Mansky, Kim C. Mansky

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28 Scopus citations

Abstract

Clinical observations have implicated the antiretroviral drug tenofovir with bone density loss during the management of HIV infection. The goal of this study was to investigate the in vitro effects of tenofovir exposure of primary osteoclasts in order to gain insights into the potential mechanisms for the drug-induced bone density loss. We hypothesized that tenofovir may alter the expression of key genes involved in osteoclast function. To test this, primary osteoclasts were exposed to physiologically relevant concentrations of the prodrug tenofovir disoproxil fumarate (TDF), then intensive microarray analysis was done to compare tenofovir-treated versus untreated cells. Specific downregulation of Gnas, Got2 and Snord32a were observed in the TDF-treated cells. The functions of these genes help to explain the basis for tenofovir-associated bone density loss. Our studies represent the first analysis of the effects of tenofovir on osteoclast gene expression and help to explain the basis of tenofovir-associated bone density loss in HIV-infected individuals.

Original languageEnglish (US)
Pages (from-to)1324-1329
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume391
Issue number3
DOIs
StatePublished - Jan 15 2010

Bibliographical note

Funding Information:
The following reagent was obtained through the NIH AIDS Research and Reference Reagent program, Division of AIDS, NIAID, NIH: Tenofovir disoproxil fumarate, Catalog No. 10198. We thank Andy Kaplan for stimulating discussions, and David Largaespada and Raha Allaei for assistance with mice. Supported by NIH Grants AR53946 (K.C.M.), DE16093 (R.G.), and GM56615 (L.M.M.). I.F.G. and L.P. were supported by the MinnCResT Program, T32DE07288.

Keywords

  • AST
  • G-protein
  • HAART
  • HIV
  • Osteoblast
  • snoRNA

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