AMPK-specific autophagy activator based on 1,3-diaza-2-oxophenoxazine

Area of Science:

• Cellular Biology
• Biochemistry
• Aging Research

Background:

• Cellular homeostasis relies on the balance between biomolecule synthesis and degradation.
• Aging disrupts this balance, contributing to diseases like diabetes and neurodegeneration.
• Reduced autophagy, a key degradation process, is implicated in this age-related imbalance.

Purpose of the Study:

• To evaluate the autophagy and mitophagy activation potential of 1,3-diaza-2-oxophenoxazine derivatives.
• To identify novel compounds that can restore cellular degradation pathways.

Main Methods:

• Fluorescent reporter assays and immunoblot analysis were used to assess autophagy induction.
• Compound specificity was tested on knockout cell lines for AMPK and SIRT1.
• Molecular docking was employed to elucidate the binding mechanism of lead compounds to AMPK.

Main Results:

• Two lead compounds, AR493 and AR900, significantly induced autophagy by activating the AMPK-dependent pathway.
• AR493 demonstrated high specificity for AMPK activation.
• Molecular docking suggested AR493 binds to the AMPK γ-subunit, potentially promoting activation.

Conclusions:

• 1,3-diaza-2-oxophenoxazine derivatives, particularly AR493, show promise as autophagy inducers.
• Targeting the AMPK pathway with these compounds may offer therapeutic avenues for age-related diseases.
• Understanding the binding mechanism provides a basis for further drug development.