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Accumulation of immune cells and high expression of chemokines/chemokine receptors in the upstream shoulder of atherosclerotic carotid plaques.

Abstract：

:The presence of immune cells is important for plaque destabilization. Disturbed flow conditions were shown to enhance the recruitment of circulating immune cells. Thus, we analyzed in 54 atherosclerotic carotid plaques the frequency of different immune cells, HLA-DR, chemokines, and chemokine receptors, comparing the upstream with the downstream plaque shoulder. The presence of neovascularization and intraplaque hemorrhages was investigated by CD34 immunostaining and Mallory's iron stain. Immunohistochemical analyses were performed to detect smooth muscle cells (SMC: actin), macrophages (CD68), T cells (CD3), dendritic cells (DC: fascin), mature DC (CD83), and the expression of HLA-DR, chemokine receptors (CCR-2, CCR-6), and chemokines (MCP-1, MIP-3alpha). Significantly more SMC were detected downstream than upstream (p<0.001). In contrast, significantly more macrophages (p=0.01), DC (p=0.03), mature DC (p=0.007), and a higher expression of HLA-DR (p=0.004), CCR-2 (p=0.002), CCR-6 (p<0.001), MCP-1 (p=0.04), and MIP-3alpha (p=NS) were observed upstream than downstream. Immune cells were strongly associated with neovascularization. The abundance of SMC downstream provides an explanation for distal plaque growth. Enhanced recruitment of immune cells through neovessels into the upstream shoulder might be contributing to plaque destabilization.

journal_name

Exp Mol Pathol

journal_title

Experimental and molecular pathology

authors

Yilmaz A,Lipfert B,Cicha I,Schubert K,Klein M,Raithel D,Daniel WG,Garlichs CD

doi

10.1016/j.yexmp.2006.10.008

subject

Has Abstract

pub_date

2007-06-01 00:00:00

pages

245-55

issue

3

eissn

0014-4800

issn

1096-0945

pii

S0014-4800(06)00130-4

journal_volume

82

pub_type

杂志文章

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