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Kanglexin delays heart aging by promoting mitophagy
Hui-Min Li1, Xin Liu1, Zi-Yu Meng1
1Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, 150081, China.
Acta Pharmacologica Sinica
|May 26, 2021
Summary
Kanglexin (KLX) and emodin prevent heart aging by enhancing mitophagy, a cellular process crucial for heart health. KLX shows superior effects by improving Parkin stability, offering a promising therapeutic strategy for age-related cardiac dysfunction.
Area of Science:
- Gerontology
- Cardiovascular Biology
- Molecular Pharmacology
Background:
- Heart aging leads to structural and diastolic dysfunction, with no current effective preventative or therapeutic drugs.
- Aging hearts exhibit dysregulated mitophagy, a key cellular process for maintaining cardiac health.
Purpose of the Study:
- To investigate the preventive effects of emodin and its derivative Kanglexin (KLX) against D-galactose-induced heart aging.
- To explore the underlying mechanisms, focusing on mitophagy and Parkin modulation.
Main Methods:
- Induction of aging in mice and cardiomyocytes using D-galactose.
- Assessment of cardiac function, remodeling, and cellular senescence.
- Analysis of mitophagy levels and Parkin protein stability.
- Molecular docking and Surface Plasmon Resonance (SPR) to determine binding affinity.
Main Results:
- KLX and emodin significantly mitigated D-galactose-induced diastolic dysfunction and cardiac remodeling in mice.
- Both compounds reversed senescence in D-galactose-treated cardiomyocytes, with KLX showing greater efficacy.
- KLX demonstrated a more pronounced increase in mitophagy compared to emodin.
- KLX exhibited higher affinity for the ubiquitin-like (UBL) domain of Parkin, enhancing its stability.
Conclusions:
- KLX and emodin are effective agents against heart aging, primarily by activating Parkin-mediated mitophagy.
- KLX demonstrates superior anti-aging effects due to enhanced Parkin stabilization.
- These findings highlight the therapeutic potential of KLX and emodin for age-related cardiac dysfunction.
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