miR-96-5p regulates wound healing by targeting BNIP3/FAK pathway

Area of Science:

• Molecular Biology
• Dermatology
• Biochemistry

Background:

• Cutaneous wound healing is essential for skin integrity.
• MicroRNAs (miRNAs) are increasingly recognized for their roles in biological processes, but their function in wound healing is underexplored.
• BCL2 interacting protein (BNIP3) and its associated miRNA, miR-96-5p, are investigated for their potential involvement in skin repair.

Purpose of the Study:

• To investigate the function of BNIP3 and miR-96-5p in cutaneous wound healing.
• To elucidate the regulatory relationship between BNIP3 and miR-96-5p.
• To determine the impact of this interaction on keratinocyte behavior and the focal adhesion kinase (FAK) pathway.

Main Methods:

• Analysis of BNIP3 and miR-96-5p expression levels during wound healing.
• Overexpression and inhibition studies of BNIP3 in human primary keratinocytes.
• Bioinformatic prediction and luciferase reporter assays to confirm direct targeting of BNIP3 by miR-96-5p.
• Assessment of cell proliferation, migration, and FAK pathway activation.

Main Results:

• BNIP3 expression increased, while miR-96-5p expression decreased during wound healing.
• BNIP3 modulated keratinocyte proliferation and migration.
• miR-96-5p was confirmed as a direct target of BNIP3.
• miR-96-5p overexpression reduced BNIP3 levels and FAK pathway activation, inhibiting keratinocyte proliferation and migration.

Conclusions:

• miR-96-5p is significantly downregulated during cutaneous wound healing.
• miR-96-5p directly targets BNIP3, influencing the FAK pathway.
• miR-96-5p plays a critical role in regulating keratinocyte proliferation and migration, thus impacting wound healing processes.