MiR-127 attenuates adipogenesis by targeting MAPK4 and HOXC6 in porcine adipocytes

Area of Science:

• Molecular Biology
• Cell Biology
• Animal Science

Background:

• MicroRNAs (miRNAs) play crucial roles in adipogenesis, but their specific functions remain incompletely understood.
• Porcine miRNA expression analysis revealed a significant age-dependent downregulation of miR-127 in adipose tissue.
• Understanding miR-127's role is vital for modulating fat deposition in livestock and potentially treating human metabolic disorders.

Purpose of the Study:

• To elucidate the precise functions and underlying mechanisms of miR-127 in porcine preadipocyte proliferation and differentiation.
• To identify the direct molecular targets of miR-127 involved in these cellular processes.

Main Methods:

• Overexpression of miR-127 in cultured porcine preadipocytes.
• Induction of proliferation and differentiation conditions.
• Assessment of cellular processes using luciferase assays, quantitative real-time PCR, and western blot analysis.
• Bioinformatic prediction and experimental validation of miRNA targets.

Main Results:

• miR-127 overexpression enhanced preadipocyte proliferation by promoting cell cycling.
• miR-127 suppressed adipocyte differentiation, evidenced by reduced lipid accumulation.
• miR-127 directly targets mitogen-activated protein kinase 4 and homeobox C6 (HOXC6) to promote proliferation.
• During differentiation, miR-127 targets HOXC6 to inhibit adipogenesis.

Conclusions:

• miR-127 acts as a significant inhibitor of porcine adipogenesis.
• The findings suggest miR-127's potential as a target for strategies aimed at reducing fat deposition in pigs.
• This research may offer therapeutic insights for managing human obesity.