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Background. This study aimed to explore the function of modified Yuejuwan (MYJ) on THP-1 macrophage-derived foam cells. Methods. First, human THP-cells were obtained, and then, grouping was made to the following: control group, foaming group, foaming group +0.2 mg/mL Jiawei Yueju pill, foaming group +0.5 mg/mL Jiawei Yueju pill, and foaming group +1 mg/mL Jiawei Yueju pill. An Oil Red O staining assay was used to examine the uptake of oxidatively modified low-density lipoprotein (oxLDL). The secretion of interleukin (IL)-1β and tumor necrosis factor (TNF)-α were determined using an enzyme-linked immunosorbent assay (ELISA). Real-time quantitative PCR (qRT-PCR) and Western blot were used to quantify genes and proteins expression levels. Results. Our results indicated that MYJ inhibited the accumulation of total cholesterol (TC), free cholesterol (FC), and cholesteryl ester (CE) in foam cells. Moreover, the secretion of IL-1β and TNF-α also downregulated in foam cells after treatment of MYJ. Furthermore, we found that tripartite motif-containing 37 (TRIM37) was significantly upregulated in foam cells. Knockdown of TRIM37 promoted cholesterol efflux and presented an anti-inflammation effect in foam cells. Furthermore, TRIM37 positively mediated the translocation of NF-κB to nuclear. It negatively regulated its ubiquitination in foam cells after interacting with TRAF2. Importantly, MYJ profoundly suppressed the function of TRIM37 in foam cells and functioned as a TRIM37 inhibitor. Conclusions. This study demonstrated that MYJ might alleviate oxLDL-induced foam cell formation by inhibiting the TRIM37/TRAF2/NF-κB pathway activity. MYJ was a potential agent in preventing atherosclerosis and indicated its potential signaling pathway in foam cells.

evidence-based complementary and alternative medicine

Modified Yuejuwan Inhibited Cholesterol Accumulation and Inflammation in THP-1 Macrophage-Derived Foam Cells by Inhibiting the Activity of the TRIM37/TRAF2/NF-κB Pathway