JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Correlation between Fc γ R III a and aortic atherosclerotic plaque destabilization in ApoE knockout mice and intervention effects of effective components of chuanxiong rhizome and red peony root.

OBJECTIVE: To explore the correlation between Fc γ RIII A (CD16A) and aortic atherosclerotic plaque destabilization in apoE knockout (apoE KO) mice and the intervention effects of effective components of chuanxiong rhizome and red peony root.

METHODS: Eight 8-week-old male C57BL/6J mice were selected as the control group. Forty 8-week-old male apoE KO mice were randomly divided into the model group, apoE KO + intraperitoneal injection immunoglobulin group (IVIG), apoE KO + simvastatin group (Sm), apoE KO + high dosage of xiongshao capsule (XSC) group (XSCH), and apoE KO + low dosage of XSC group (XSCL), 8 mice in each group. Mice in the control group were put on a normal diet, and others were fed with a high-fat diet. After 10-week different interventions, monocyte CD16 expression was detected by flow cytometry, aortic matrix metalloproteinase-9 (MMP-9) mRNA expression was detected using reverse transcription polymerase chain reaction, and serum tumor necrosis factor (TNF)-α level was detected using enzyme-linked immunosorbent assay.

RESULTS: Compared with the control group, monocyte CD16 expression, aortic MMP-9 mRNA expression, and serum TNF-α level in the model group increased obviously (P<0.01). Injections of apoE KO mice with intraperitoneal immunoglobulin during a 5-day period significantly reduced the monocyte CD16 expression, aortic MMP-9 mRNA expression, and serum TNF-α level (P<0.01 or 0.05) over a 10-week period of high-fat diet. Indices above in the Sm group, XSCH group, and XSCL group decreased in a different degree. Of them, the aortic MMP-9 mRNA expression in XSCH group was lower than that in Sm group (P<0.05) and the monocyte CD16 expression and serum TNF-α level showed no significant difference between XSCH group and Sm group (P>0.05). Correlation analyses suggested positive correlation between monocyte CD16 expression and aortic MMP-9 mRNA expression or serum TNF-α level in IVIG group, XSCH group, and XSCL group.

CONCLUSIONS: FcγR III A mediates systemic inflammation in the progression of coronary heart disease with blood stasis syndrome. XSC could stabilize atherosclerotic plaque by suppressing inflammation and its target was relative with FcγRIII A.

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