Inhibition of microRNA-128-3p attenuates hypercholesterolemia in mouse model

Area of Science:

• Biochemistry
• Molecular Biology
• Genetics

Background:

• Hypercholesterolemia is a major risk factor for cardiovascular diseases.
• Novel therapeutic strategies are needed to manage high cholesterol levels.
• MicroRNAs play significant roles in metabolic regulation.

Purpose of the Study:

• To investigate the therapeutic potential of inhibiting miR-128-3p in a hypercholesterolemic mouse model.
• To elucidate the molecular mechanisms underlying miR-128-3p's role in cholesterol metabolism.

Main Methods:

• Administration of anti-miR-128-3p (AM-128) in a hypercholesterolemic mouse model.
• Quantification of serum and liver cholesterol profiles.
• Validation of gene expression and protein levels using qRT-PCR, Western blotting, ELISA, and dual luciferase assays.

Main Results:

• AM-128 treatment upregulated INSIG1 and downregulated HMGCR, inhibiting cholesterol biosynthesis.
• AM-128 increased cholesterol clearance via SR-B1 and LDLR.
• AM-128 enhanced cholesterol catabolism through CYP7A1.

Conclusions:

• miR-128-3p inhibition plays a critical role in lowering serum cholesterol levels.
• Targeting miR-128-3p demonstrates therapeutic potential for managing hypercholesterolemia.