Polygoni Multiflori Radix Preparat Delays Skin Aging by Inducing Mitophagy

Area of Science:

• Dermatology and aging research
• Molecular biology and cellular senescence
• Natural product pharmacology

Background:

• Skin aging is an inevitable process with significant cosmetic, psychological, and health implications.
• Understanding the molecular mechanisms underlying skin aging is crucial for developing effective interventions.
• There is a need to explore natural compounds for their anti-aging properties.

Purpose of the Study:

• To investigate the potential of Polygoni multiflori radix preparata (PMRP) in preventing or delaying skin aging.
• To elucidate the molecular mechanisms by which PMRP exerts its anti-aging effects, focusing on mitophagy and apoptosis.

Main Methods:

• D-galactose induced skin aging models in mice.
• Administration of PMRP, alone or with 3-methyladenine or rapamycin.
• Assessment of physical, biochemical, histological, and molecular markers of skin aging, including mitochondrial function, mitophagy, and apoptosis.
• Measurement of key proteins involved in mitophagy (PINK1, Parkin, P62, LC3II/I) and apoptosis.

Main Results:

• PMRP treatment improved skin histological structure, increased collagen ratios, and enhanced antioxidant capacity.
• PMRP ameliorated mitochondrial dysfunction by increasing mitochondrial membrane potential and ATP levels, while decreasing reactive oxygen species (ROS).
• PMRP significantly induced mitophagy, evidenced by increased expression of PINK1, Parkin, and LC3II/I, and decreased P62.
• PMRP alleviated apoptosis by reducing pro-apoptotic proteins and increasing the anti-apoptotic protein Bcl-2.

Conclusions:

• Polygoni multiflori radix preparata demonstrates significant anti-aging effects on the skin.
• The mechanism involves the induction of mitophagy and the subsequent improvement of mitochondrial function.
• PMRP also mitigates apoptosis, contributing to its overall skin-protective effects.