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Tanyanskiy DA, Shavva VS, Dizhe EB, Oleinikova GN, Lizunov AV, Nekrasova EV, Mogilenko DA, Larionova EE, Orlov SV, Denisenko AD. Adiponectin Stimulates Apolipoprotein A-1 Gene Expression in HepG2 Cells via AMPK, PPARα, and LXRs Signaling Mechanisms. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:1252-1259. [PMID: 36509728 DOI: 10.1134/s0006297922110049] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Adiponectin is an adipose tissue hormone, participating in energy metabolism and involved in atherogenesis. Previously, it was found that adiponectin increases expression of the APOA1 (apolipoprotein A-1) gene in hepatocytes, but the mechanisms of this effect remained unexplored. Our aim was to investigate the role of adiponectin receptors AdipoR1/R2, AMP-activated protein kinase (AMPK), nuclear peroxisome proliferator-activated receptor alpha (PPARα) and liver X receptors (LXRs) in mediating the action of adiponectin on hepatic APOA1 expression in human hepatoma HepG2 cells. The level of APOA1 expression was determined by RT-qPCR and ELISA. We showed that the siRNA-mediated knockdown of genes coding for AdipoR1, AdipoR2, AMPK, PPARα, and LXRα and β prevented adiponectin-induced APOA1 expression in HepG2 cells and demonstrated that interaction of PPARα and LXRs with the APOA1 gene hepatic enhancer is important for the adiponectin-dependent APOA1 transcription. The results of this study point out to the involvement of both types of adiponectin receptors, AMPK, PPARα, and LXRs in the adiponectin-dependent upregulation of the APOA1 expression.
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Affiliation(s)
- Dmitry A Tanyanskiy
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia. .,Department of Fundamental Problems of Medicine and Medical Technologies, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Vladimir S Shavva
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia
| | - Ella B Dizhe
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia
| | - Galina N Oleinikova
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia
| | - Alexey V Lizunov
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia.,Department of Embryology, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Ekaterina V Nekrasova
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia
| | - Denis A Mogilenko
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia
| | - Ekaterina E Larionova
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia
| | - Sergey V Orlov
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia.,Department of Embryology, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Alexander D Denisenko
- Department of Biochemistry, Institute of Experimental Medicine, St. Petersburg, 197376, Russia.,Department of Fundamental Problems of Medicine and Medical Technologies, St. Petersburg State University, St. Petersburg, 199034, Russia
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