LITAF Promotes Atherosclerotic Plaque Formation by Stimulating the NF-κB Inflammatory Pathway.

Area of Science:

• Cardiovascular Biology
• Inflammation Research
• Molecular Pathology

Background:

• Atherosclerosis is a chronic inflammatory disease characterized by plaque buildup in arteries.
• Lipopolysaccharide-induced tumor necrosis factor-α factor (LITAF) is a recently identified inflammatory protein.
• The specific role of LITAF in atherosclerosis pathogenesis remains largely unexplored.

Purpose of the Study:

• To investigate the involvement of LITAF in the development of atherosclerosis.
• To elucidate the molecular mechanisms by which LITAF influences atherosclerotic plaque formation.

Main Methods:

• Atherosclerosis was induced in C57BL/6J mice with and without LITAF gene knockout (LITAF-/-).
• Aortic root cryosections were analyzed using Oil Red O and immunohistochemical staining (CD68, α-SMA, Masson).
• NF-κB pathway activation was assessed via Western blotting and RT-PCR to measure key protein and RNA expression.

Main Results:

• LITAF-/- mice exhibited significantly reduced atherosclerotic plaque area compared to control mice.
• Immunohistochemistry revealed lower expression of α-SMA and CD68, but altered Masson staining in LITAF-/- mice.
• NF-κB pathway components (P65, caspase 3) were downregulated, while IκB was upregulated in LITAF-/- mice.

Conclusions:

• LITAF plays a promoting role in the formation of atherosclerotic plaques.
• The pro-atherogenic effects of LITAF appear to be mediated through the NF-κB inflammatory pathway.
• Targeting LITAF may represent a novel therapeutic strategy for atherosclerosis.