Differentially altered molecular signature of visceral adipose tissue in HIV-1-associated lipodystrophy

José M. Gallego-Escuredo, Joan Villarroya, Pere Domingo, Eduard M. Targarona, Marta Alegre, Joan C. Domingo, Francesc Villarroya, Marta Giralt

Research output: Contribution to journalArticleResearchpeer-review

29 Citations (Scopus)


OBJECTIVE:: Lipodystrophy in HIV-1-infected antiretroviral-treated patients is often associated with opposite alterations in adipose tissue depots as follows: lipoatrophy of subcutaneous adipose tissue (SAT) versus lipohypertrophy of visceral adipose tissue (VAT). We determined the specific molecular alterations in VAT relative to SAT in patients. DESIGN:: We analyzed the expression of marker genes of mitochondrial function, adipogenesis, and inflammation in a unique collection of 8 biopsies of omental VAT from HIV-1-infected antiretroviral-treated patients with lipodystrophy. For comparison, we analyzed SAT from 10 patients, and SAT and VAT from 10 noninfected individuals. METHODS:: Quantitative real-time polymerase chain reaction of mitochondrial DNA and gene transcripts; immunoblot and multiplex for quantification of specific proteins. RESULTS:: Similar mitochondrial DNA depletion and abnormal increases in mitochondrial protein levels were found in VAT and SAT from patients. Transcript levels of adipogenesis and metabolism marker genes were unaltered in VAT but were decreased in SAT. Tumor necrosis factor α and CD68 were similarly induced in both adipose depots from patients, but other markers of inflammation-related pathways showed distinct alterations as follows: interleukin 18 and interleukin 1 receptor antagonist were induced only in SAT, whereas interleukin 6, interleukin 8, and monocyte chemoattractant protein 1 expression was reduced in VAT but not in SAT. CONCLUSIONS:: Mitochondrial alterations are similar in VAT and SAT from patients, whereas adipogenic gene expression is decreased in SAT but unaltered in VAT, highlighting the relevance of adipogenic processes in the differential alterations of fat depots. Specific disturbances in inflammatory status in VAT relative to SAT are present. Milder induction of proinflammatory signaling in VAT could be involved in preventing fat wasting in this depot. Copyright © 2013 by Lippincott Williams & Wilkins.
Original languageEnglish
Pages (from-to)142-148
JournalJournal of acquired immune deficiency syndromes (1999)
Issue number2
Publication statusPublished - 1 Oct 2013


  • Adipogenesis
  • Inflammation
  • Lipodystrophy
  • Mitochondria
  • Subcutaneous adipose tissue
  • Visceral adipose tissue


Dive into the research topics of 'Differentially altered molecular signature of visceral adipose tissue in HIV-1-associated lipodystrophy'. Together they form a unique fingerprint.

Cite this