Chlamydial lipoproteins stimulate toll-like receptors 1/2 mediated inflammatory responses through MyD88-dependent pathway

Yong Wang, Qiong Liu, Ding Chen, Jie Guan, Linghui Ma, Guangming Zhong, Hengping Shu, Xiang Wu

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10 Scopus citations


Chlamydiae are very important pathogens which could cause several types of diseases in human, but little is known about its pathogenic mechanism. In order to elucidate host inflammatory response and the signal pathway induced by Chlamydial lipoproteins, the predicted lipoproteins of Chlamydia trachomatis were tested for their ability to induce the release of proinflammatory cytokines by mouse macrophages or human TLR (Toll-Like Receptor) expressing cell lines. The results showed that recombinant proteins of C. trachomatis D381, D541, D067, and D775 displayed a strong ability to induce the release of IL-8 in TLR expressing cell line. The signal pathways involved TLR1/2 and TLR2/CD14 but not TLR4. Moreover, except D067, the proinflammatory cytokine induction by D381, D541, and D775 required the thioacylation site (cysteine) for lipid modification and the induction was through MyD88-mediated pathway. Our data supported that lipoproteins played a vital role in pathogenesis of C. trachomatis-induced inflammatory responses via TLR pathway. It was the first study to characterize other chlamydial lipoproteins after identifying the role of MIP (D541) on pathogenesis of Chlamydial diseases.

Original languageEnglish (US)
Article number78
JournalFrontiers in Microbiology
Issue numberJAN
StatePublished - Jan 26 2017



  • Chlamydial trachoma
  • Cytokine
  • Immune response
  • Lipoproteins
  • Toll-Like Receptor

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)

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