Open Access

P‑selectin increases angiotensin II‑induced cardiac inflammation and fibrosis via platelet activation

  • Authors:
    • Gaizhen Liu
    • Bin Liang
    • Xiaosu Song
    • Rui Bai
    • Weiwei Qin
    • Xu Sun
    • Yan Lu
    • Yunfei Bian
    • Chuanshi Xiao
  • View Affiliations

  • Published online on: April 25, 2016     https://doi.org/10.3892/mmr.2016.5186
  • Pages: 5021-5028
  • Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Platelet activation is important in hypertension‑induced cardiac inflammation and fibrosis. P-selectin expression significantly (P<0.05) increases when platelets are activated during hypertension. Although P‑selectin recruits leukocytes to sites of inflammation, the role of P‑selectin in cardiac inflammation and fibrosis remains to be elucidated. The present study aimed to investigate whether platelet‑derived P‑selectin promotes hypertensive cardiac inflammation and fibrosis. P‑selectin knockout (P‑sel KO) mice and wild‑type (WT) C57BL/6 littermates were infused with angiotensin II (Ang II) at 1,500 ng/kg/min for 7 days and then cross‑transplanted with platelets originating from either WT or P‑sel KO mice. P‑selectin expression was increased in the myocardium and plasma of hypertensive mice, and the P‑sel KO mice exhibited significantly (P<0.05) reduced cardiac fibrosis. The fibrotic areas were markedly smaller in the hearts of P‑sel KO mice compared with WT mice, as assessed by Masson's trichrome staining. In addition, α‑smooth muscle actin and transforming growth factor β1 (TGF‑β1) expression levels were decreased in the P‑sel KO mice, as assessed by immunohistochemistry. Following platelet transplantation into P‑sel KO mice, the number of Mac‑2 (galectin‑3)‑ and TGF‑β1‑positive cells was increased in mice that received WT platelets compared with those that received P‑sel KO platelets, and the mRNA expression levels of collagen I and TGF‑β1 were also increased. The results from the present study suggest that activated platelets secrete P‑selectin to promote cardiac inflammation and fibrosis in Ang II‑induced hypertension.
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June-2016
Volume 13 Issue 6

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Copy and paste a formatted citation
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Spandidos Publications style
Liu G, Liang B, Song X, Bai R, Qin W, Sun X, Lu Y, Bian Y and Xiao C: P‑selectin increases angiotensin II‑induced cardiac inflammation and fibrosis via platelet activation. Mol Med Rep 13: 5021-5028, 2016
APA
Liu, G., Liang, B., Song, X., Bai, R., Qin, W., Sun, X. ... Xiao, C. (2016). P‑selectin increases angiotensin II‑induced cardiac inflammation and fibrosis via platelet activation. Molecular Medicine Reports, 13, 5021-5028. https://doi.org/10.3892/mmr.2016.5186
MLA
Liu, G., Liang, B., Song, X., Bai, R., Qin, W., Sun, X., Lu, Y., Bian, Y., Xiao, C."P‑selectin increases angiotensin II‑induced cardiac inflammation and fibrosis via platelet activation". Molecular Medicine Reports 13.6 (2016): 5021-5028.
Chicago
Liu, G., Liang, B., Song, X., Bai, R., Qin, W., Sun, X., Lu, Y., Bian, Y., Xiao, C."P‑selectin increases angiotensin II‑induced cardiac inflammation and fibrosis via platelet activation". Molecular Medicine Reports 13, no. 6 (2016): 5021-5028. https://doi.org/10.3892/mmr.2016.5186