Cellular Mechanism Underlying Highly-Active or Antiretroviral Therapy-Induced Lipodystrophy: Atazanavir, a Protease Inhibitor, Compromises Adipogenic Conversion of Adipose-Derived Stem/Progenitor Cells through Accelerating ER Stress-Mediated Cell Death in Differentiating Adipocytes

Autor: Shunichi Yamashita, Akira Ohtsuru, Sadanori Akita, Keiji Suzuki, Hiroshi Yoshimoto, Akiyoshi Hirano
Rok vydání: 2021
Předmět:
HAART
Lipodystrophy
Adipose tissue
Apoptosis
ADSC
lcsh:Chemistry
Antiretroviral Therapy
Highly Active
Adipocytes
lcsh:QH301-705.5
Endoplasmic Reticulum Chaperone BiP
Spectroscopy
Cells
Cultured
Adipogenesis
Cell Death
Chemistry
Stem Cells
Cell Differentiation
General Medicine
Endoplasmic Reticulum Stress
Computer Science Applications
Adipose Tissue
Anti-Retroviral Agents
Stem cell
ER stress
ART
medicine.drug
Programmed cell death
Atazanavir Sulfate
Article
Catalysis
Inorganic Chemistry
medicine
Humans
Protease Inhibitors
Physical and Theoretical Chemistry
Progenitor cell
Molecular Biology
Organic Chemistry
Lipid Droplets
medicine.disease
Atazanavir
Oxidative Stress
lcsh:Biology (General)
lcsh:QD1-999
Cancer research
Unfolded protein response
Reactive Oxygen Species
human activities
Transcription Factor CHOP
DNA Damage
Zdroj: International Journal of Molecular Sciences, Vol 22, Iss 2114, p 2114 (2021)
International Journal of Molecular Sciences
Volume 22
Issue 4
ISSN: 1422-0067
Popis: Lipodystrophy is a common complication in human immunodeficiency virus (HIV)-infected patients receiving highly active antiretroviral therapy (HAART) or antiretroviral therapy (ART). Previous studies demonstrated that endoplasmic reticulum (ER) stress-mediated unfolded protein response (UPR) is involved in lipodystrophy; however, the detailed mechanism has not been fully described in human adipogenic cell lineage. We utilized adipose tissue-derived stem cells (ADSCs) obtained from human subcutaneous adipose tissue, and atazanavir (ATV), a protease inhibitor (PI), was administered to ADSCs and ADSCs undergoing adipogenic conversion. Marked repression of adipogenic differentiation was observed when ATV was administered during 10 days of ADSC culture in adipogenic differentiation medium. Although ATV had no effect on ADSCs, it significantly induced apoptosis in differentiating adipocytes. ATV treatment also caused the punctate appearance of CCAAT-enhancer-binding (C/EBP) protein homologous protein (CHOP), and altered expression of CHOP and GRP78/Bip, which are the representation of ER stress, only in differentiating adipocytes. Administration of UPR inhibitors restored adipogenic differentiation, indicating that ER stress-mediated UPR was induced in differentiating adipocytes in the presence of ATV. We also observed autophagy, which was potentiated in differentiating adipocytes by ATV treatment. Thus, adipogenic cell atrophy leads to ATV-induced lipodystrophy, which is mediated by ER stress-mediated UPR and accelerated autophagy, both of which would cause adipogenic apoptosis. As our study demonstrated for the first time that ADSCs are unsusceptible to ATV and its deleterious effects are limited to the differentiating adipocytes, responsible target(s) for ATV-induced lipodystrophy may be protease(s) processing adipogenesis-specific protein(s).
International Journal of Molecular Sciences, 22(4), art.no.2114; 2021
Databáze: OpenAIRE
Externí odkaz: