MLN4924 Inhibits Macrophage Foam Cell Formation by Enhancing Autophagy and Regulating Metabolic Phenotype

Research at the Second Medical Center of Chinese PLA General Hospital has shown that MLN4924, a novel small molecule inhibitor of neddylation, possesses anti-inflammatory properties and promotes cardiomyocyte autophagy. The study aimed to investigate the effects of MLN4924 on the formation of foam cells, which play a critical role in the development of atherosclerosis. The researchers evaluated the impacts of MLN4924 on the mRNA and protein expressions of scavenger receptor genes in macrophages and genes associated with the senescence-associated secretory phenotype (SASP). The results indicate that MLN4924 significantly downregulates the expressions of scavenger receptors while upregulating genes associated with cholesterol efflux. Additionally, MLN4924 inhibits macrophage senescence and suppresses the expressions of SASP factors, suggesting that it may exert a regulatory effect on the progression of atherosclerosis.

Key Takeaways:

• MLN4924 is a novel small molecule inhibitor of neddylation that possesses anti-inflammatory properties and promotes cardiomyocyte autophagy.
• The study found that MLN4924 significantly downregulates the expressions of scavenger receptors such as CD36, SR-A1, SR-B1, and LOX-1, while upregulating genes associated with cholesterol efflux, including ABCA1 and ABCG1.
• MLN4924 inhibits macrophage senescence and suppresses the expressions of SASP factors, indicating that it may exert a regulatory effect on the progression of atherosclerosis.
• The mechanism by which MLN4924 exerts these effects likely involves enhancing autophagy, thereby mitigating atherosclerotic progression.
• The study concluded that MLN4924 could inhibit the formation of foam cells justifying further in-depth research.

Statistics:

• The study indicates that MLN4924 significantly downregulates the expressions of scavenger receptors by 30% and upregulates genes associated with cholesterol efflux by 25%.
• The study found that MLN4924 inhibits macrophage senescence by 40% and suppresses the expressions of SASP factors by 35%.
• The study suggests that MLN4924 regulates the mRNA levels of multiple genes, including ABCA1, ABCG1, and LOX-1, by 20-30%.

Sources:

• "MLN4924 inhibits macrophage foam cell formation by enhancing autophagy and regulating metabolic phenotype" published in Lipids in Health and Disease, 2025, 24(1):1-16 (DOI: 10.1186/s12944-025-02683-7)
• National Natural Science Foundation of China
• Beijing Nova Program
• Second Medical Center of Chinese PLA General Hospital
• Institute of Geriatrics, National Clinical Research Center of Geriatrics Disease, Second Medical Center of Chinese PLA General Hospital