Myeloid IκBα deficiency promotes atherogenesis by enhancing leukocyte recruitment to the plaques.

Myeloid IκBα deficiency promotes atherogenesis by enhancing leukocyte recruitment to the plaques.
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DOI:
10.1371/journal.pone.0022327
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
de Winther MP
de Winther MP
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Goossens P;Vergouwe MN;Gijbels MJ;Curfs DM;van Woezik JH;Hoeksema MA;Xanthoulea S;Leenen PJ;Rupec RA;Hofker MH;de Winther MP

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Activation of the transcription factor NF-κB appears to be involved in different stages of atherogenesis. In this paper we investigate the role of NF-κB inhibitor IκBα in atherosclerosis. Myeloid-specific deletion of IκBα results in larger and more advanced lesions in LDL-R-deficient mice without affecting the compositional phenotype of the plaques or systemic inflammatory markers in the plasma. We show that IκBα-deleted macrophages display enhanced adhesion to an in vitro endothelial cell layer, coinciding with an increased expression of the chemokine CCL5. Also, in vivo we found that IκBαdel mice had more leukocytes adhering to the luminal side of the endothelial cell layers that cover the atherosclerotic plaques. Moreover, we introduce ER-MP58 in this paper as a new immunohistochemical tool for quantifying newly recruited myeloid cells in the atherosclerotic lesion. This staining confirms that in IκBαdel mice more leukocytes are attracted to the plaques. In conclusion, we show that IκBα deletion in myeloid cells promotes atherogenesis, probably through an induced leukocyte recruitment to plaques.
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