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Downregulation of LILRB4 Promotes Human Aortic Smooth Muscle Cell Contractile Phenotypic Switch and Apoptosis in Aortic Dissection

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Date 2024 Feb 7
PMID 38324114
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Abstract

Aortic dissection (AD) is a severe vascular disease with high rates of mortality and morbidity. However, the underlying molecular mechanisms of AD remain unclear. Differentially expressed genes (DEGs) were screened by bioinformatics methods. Alterations of histopathology and inflammatory factor levels in β-aminopropionitrile (BAPN)-induced AD mouse model were evaluated through Hematoxylin-Eosin (HE) staining and Enzyme-linked immunosorbent assay (ELISA), respectively. Reverse transcription quantitative real-time polymerase chain reaction was performed to detect DEGs expression. Furthermore, the role of LILRB4 in AD was investigated through Cell Counting Kit-8 (CCK-8), wound healing, and flow cytometry. Western blotting was employed to assess the phenotypic switch and extracellular matrix (ECM)-associated protein expressions in platelet-derived growth factor-BB (PDGF-BB)-stimulated in vitro model of AD. In the AD mouse model, distinct dissection formation was observed. TNF-α, IL-1β, IL-8, and IL-6 levels were higher in the AD mouse model than in the controls. Six hub genes were identified, including LILRB4, TIMP1, CCR5, CCL7, MSR1, and CLEC4D, all of which were highly expressed. Further exploration revealed that LILRB4 knockdown inhibited the cell vitality and migration of PDGF-BB-induced HASMCs while promoting apoptosis and G0/G1 phase ratio. More importantly, LILRB4 knockdown promoted the protein expression of α-SMA and SM22α, while decreasing the expression of Co1, MMP2, and CTGF, which suggested that LILRB4 silencing promoted contractile phenotypic transition and ECM stability. LILRB4 knockdown inhibits the progression of AD. Our study provides a new potential target for the clinical treatment of AD.

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References
1.
Zha Z, Pan Y, Zheng Z, Wei X . Prognosis and Risk Factors of Stroke After Thoracic Endovascular Aortic Repair for Stanford Type B Aortic Dissection. Front Cardiovasc Med. 2022; 8:787038. PMC: 8784656. DOI: 10.3389/fcvm.2021.787038. View

2.
Chen S, Lin Y, Wu V, Lin M, Chou A, Chu P . Effect of β-blocker therapy on late outcomes after surgical repair of type A aortic dissection. J Thorac Cardiovasc Surg. 2019; 159(5):1694-1703.e3. DOI: 10.1016/j.jtcvs.2019.05.032. View

3.
Zhu S, Zhu J, Zhou Z, Xi E, Wang R, Zhang Y . TGF-β1 induces human aortic vascular smooth muscle cell phenotype switch through PI3K/AKT/ID2 signaling. Am J Transl Res. 2016; 7(12):2764-74. PMC: 4731673. View

4.
Wang Y, Dong C, Peng G, Huang H, Yu Y, Ji Z . MicroRNA-134-5p Regulates Media Degeneration through Inhibiting VSMC Phenotypic Switch and Migration in Thoracic Aortic Dissection. Mol Ther Nucleic Acids. 2019; 16:284-294. PMC: 6446055. DOI: 10.1016/j.omtn.2019.02.021. View

5.
Xu Z, Zhong K, Guo G, Xu C, Song Z, Wang D . circ_TGFBR2 Inhibits Vascular Smooth Muscle Cells Phenotypic Switch and Suppresses Aortic Dissection Progression by Sponging miR-29a. J Inflamm Res. 2021; 14:5877-5890. PMC: 8593842. DOI: 10.2147/JIR.S336094. View