کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1930758 1050526 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Peptidoglycan enhances secretion of monocyte chemoattractants via multiple signaling pathways
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Peptidoglycan enhances secretion of monocyte chemoattractants via multiple signaling pathways
چکیده انگلیسی

Peptidoglycan (PG) is detected in a high proportion in inflammatory cell-rich regions of human atheromatous plaques. In the present study, we determined the cellular factors involved in PG-mediated chemokine expression in mononuclear cells in order to understand the molecular mechanisms of inflammatory responses to bacterial pathogen-associated molecular patterns in the diseased artery. Exposure of human monocytic leukemia THP-1 cells to PG resulted in not only enhanced secretion of CCL2 and CCL4 but also profound induction of their gene transcripts, which were abrogated by oxidized 1-palmitoyl-2-arachidonosyl-sn-phosphatidylcholine, an inhibitor of Toll-like receptors (TLRs)-2/4, but not by polymyxin B. PG enhanced phosphorylation of Akt and mitogen-activated protein kinases and activated protein kinase C. Pharmacological inhibitors such as SB202190, SP6001250, U0126, Akt inhibitor IV, rapamycin, and RO318220 significantly attenuated PG-mediated up-regulation of CCL2 and CCL4. We propose that PG contributes to vascular inflammation in atherosclerotic plaques by upregulating expression of mononuclear cell chemoattractants via TLR-2, protein kinase C, Akt, mTOR, and mitogen-activated protein kinases.


► Peptidoglycan activated protein kinase C, Akt, and MAPKs.
► Peptidoglycan induced expression of CCL2 and CCL4 expression at messenger and protein levels.
► Inhibitors of TLR2, PKC, MAPKs, PI3K, Akt, and mTOR differentially modulated PG-mediated upregulation of CCL2 and CCL4.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 408, Issue 1, 29 April 2011, Pages 132–138
نویسندگان
, , , , , , , ,