Open Access

Complement anaphylatoxin C4a inhibits C5a-induced neointima formation following arterial injury

  • Authors:
    • Yan Zhao
    • Heng Xu
    • Wenhui Yu
    • Bao-Dong Xie
  • View Affiliations

  • Published online on: April 24, 2014     https://doi.org/10.3892/mmr.2014.2176
  • Pages: 45-52
  • Copyright: © Zhao et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Interactions between complement anaphylatoxins have been investigated in numerous fields; however, their functions during arterial remodeling following injury have not been studied. The inhibitory effect of complement anaphylatoxin C4a on neointima formation induced by C5a following arterial injury was investigated. Mice were subjected to wire-induced endothelial denudation of the femoral artery and treated with C5a alone or C5a + C4a for two weeks. C4a significantly inhibited C5a-induced neointima formation and the expression of CD68, F4/80, tumor necrosis factor-α (TNF‑α), interleukin-6 (IL-6) and monocyte chemotactic protein-1 (MCP-1). In vitro, although C4a did not directly inhibit the migration, proliferation or the expression of vascular cell adhesion molecule-1 (VCAM-1) of C5a-induced vascular smooth muscle cells (VSMCs), C5a-pretreated conditioned medium‑induced migration, proliferation and VCAM-1 expression of VSMCs were suppressed when VSMCs were exposed to conditioned medium from C4a-pretreated macrophages. In addition, C5a-induced TNF-α, IL-6 and MCP-1 expression, Ca2+ influx and extracellular signal-regulated kinase (ERK) activation in macrophages were suppressed by C4a. C4a inhibits C5a-induced neointima formation, not by acting directly on VSMCs, but via a macrophage-mediated reaction by inhibiting the Ca2+-dependent ERK pathway in macrophages.
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July-2014
Volume 10 Issue 1

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

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Spandidos Publications style
Zhao Y, Xu H, Yu W and Xie B: Complement anaphylatoxin C4a inhibits C5a-induced neointima formation following arterial injury. Mol Med Rep 10: 45-52, 2014
APA
Zhao, Y., Xu, H., Yu, W., & Xie, B. (2014). Complement anaphylatoxin C4a inhibits C5a-induced neointima formation following arterial injury. Molecular Medicine Reports, 10, 45-52. https://doi.org/10.3892/mmr.2014.2176
MLA
Zhao, Y., Xu, H., Yu, W., Xie, B."Complement anaphylatoxin C4a inhibits C5a-induced neointima formation following arterial injury". Molecular Medicine Reports 10.1 (2014): 45-52.
Chicago
Zhao, Y., Xu, H., Yu, W., Xie, B."Complement anaphylatoxin C4a inhibits C5a-induced neointima formation following arterial injury". Molecular Medicine Reports 10, no. 1 (2014): 45-52. https://doi.org/10.3892/mmr.2014.2176