牙龈卟啉单胞菌
TLR2型
脂多糖
细胞因子
TLR4型
Toll样受体
内皮干细胞
受体
细胞
电池类型
化学
免疫学
微生物学
生物
细胞生物学
先天免疫系统
炎症
免疫系统
细菌
体外
生物化学
遗传学
作者
Leyla Kocgozlu,R. Elkaïm,Henri Tenenbaum,Sidney C. Werner
标识
DOI:10.1177/0022034509341166
摘要
Porphyromonas gingivalis is a major etiological agent of chronic periodontal diseases, the virulence of which has been attributed to different factors, including lipopolysaccharide (LPS). We investigated the differential responses induced by P. gingivalis LPS stimulation of human umbilical vein endothelial cells and human oral epithelial cells. RT-PCR analysis showed that P. gingivalis LPS used Toll-like receptor 2 (TLR2) to activate epithelial cells and Toll-like receptor 4 (TLR4) to activate endothelial cells. Both cell types were stimulated by P. gingivalis LPS to produce pro-inflammatory cytokines. Cytokine Array assay showed that although patterns of cytokine expression were similar in both cell types, some cytokines were specifically secreted by the endothelial cells, and others were specific to epithelial cells. These results support the idea that the same LPS preparation can act as a TLR2 or TLR4 agonist, depending on TLR expression of the host cell, inducing cytokine profiles that differ according to the cell type.
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