NAcM-OPT protects keratinocytes from H₂O₂-induced cell damage by promoting autophagy

Area of Science:

• Dermatology
• Cell Biology
• Pharmacology

Background:

• Oxidative stress contributes to skin damage and conditions like vitiligo.
• Keratinocytes are susceptible to hydrogen peroxide (H2O2)-induced oxidative damage.
• Small molecules targeting cellular protective mechanisms are needed for dermatological treatments.

Purpose of the Study:

• To investigate the protective effects of NAcM-OPT, a DCN1 inhibitor, against H2O2-induced oxidative damage in keratinocytes.
• To evaluate NAcM-OPT's impact on autophagy, mitochondrial function, and melanin synthesis.
• To assess NAcM-OPT's therapeutic potential for vitiligo.

Main Methods:

• Cell viability was assessed using CCK-8 assays.
• Autophagic flux was monitored using a dual fluorescent autophagy indicator system.
• Protein and gene expression (LC3, Beclin 1, TYR, NFE2L2, HO1, NQO1, GCLM) were analyzed via Western blotting and qRT-PCR.
• In vivo studies evaluated epidermal thickness, follicle length, and melanin synthesis.

Main Results:

• NAcM-OPT significantly increased keratinocyte viability and proliferation.
• The molecule enhanced autophagic flux and upregulated autophagy-related proteins under oxidative stress.
• NAcM-OPT mitigated mitochondrial damage, restored mitochondrial function, and boosted antioxidant gene expression.
• In vivo, NAcM-OPT promoted epidermal thickening, increased follicle length, and enhanced melanin synthesis.

Conclusions:

• NAcM-OPT demonstrates significant protective effects against oxidative stress in keratinocytes.
• The compound promotes autophagy and improves mitochondrial health, key mechanisms in cellular protection.
• NAcM-OPT shows promise as a therapeutic agent for vitiligo due to its antioxidant and melanogenic properties.