Amentoflavone Induces Autophagy and Modulates p53

Area of Science:

• Biochemistry
• Cell Biology
• Pharmacology

Background:

• Amentoflavone, a major component of Selaginella tamariscina, possesses known medicinal properties including anti-inflammatory and anti-apoptotic effects.
• The impact of amentoflavone on cellular autophagy, a process linked to aging, has not been previously investigated.

Purpose of the Study:

• To investigate the effect of amentoflavone on autophagy induction.
• To determine if amentoflavone influences cell aging processes.

Main Methods:

• Cellular aging was induced using insulin-like growth factor-1 (IGF-1).
• Cell viability was assessed using the MTT assay in A549 and WI-38 cells.
• Autophagy induction was measured via an autophagy detection kit, western blot, and immunofluorescence assays, examining key proteins like Atg7, Beclin1, and LC3.

Main Results:

• Amentoflavone was found to induce autophagosome formation and enhance the expression of autophagy-related proteins (Atg7, Beclin1, Atg3, LC3).
• Amentoflavone inhibited IGF-1 and hydrogen peroxide-induced cell aging.
• The compound increased levels of p53 and p-p21 and elevated SIRT1 activity, which deacetylates p53.

Conclusions:

• Amentoflavone demonstrates a positive role in inducing autophagy.
• Amentoflavone exhibits anti-aging properties by inhibiting cellular senescence.
• These findings suggest amentoflavone's potential in managing diseases linked to autophagy dysfunction and p53 modulation.