title: TLR2 and TLR4 expression in peripheral blood mononuclear cells of patients with chronic cystic echinococcosis and its relationship with IL-10.
abstract: This study aims at relating Toll-like receptors (TLR) and human systemic cytokines in patients with chronic cystic echinococcosis (CE). By real-time fluorescent quantitative reverse-transcription polymerase chain reaction, we measured the expression level of TLR2 and TLR4 mRNA in peripheral blood mononuclear cells (PBMCs), and using ELISA, we detected the cytokines IFN-γ, IL-12p70, IL-10, IL-4 and IL-17A from 34 chronic CE cases (four patients with biliary leakage; four patients with secondary location including three in lung and one in bone) and 22 healthy controls (HC). TLR2 and TLR4 mRNA expression were significantly higher in the CE group (P<0·05); levels of serum IL-10, IL-4 and IL-12p70 in patients with CE were significantly higher than those in controls (P<0·05). There were no differences in IFN-γ and IL-17A levels between the CE group and the HC group (P>0·05). In the patients with CE, positive correlations were noted between the expression of TLR2 and the serum level of IL-10, as well as between the expression of TLR4 and the serum level of IL-10. Our findings supported the hypothesis that during chronic CE infection, altered TLR expression might be involved in the cytokine modulation, which allowed the parasite to escape host immunosurveillance and promoted chronic infection.
authors.affiliation: Xinjiang Key Laboratory of Echinococcosis and Liver Surgery Research, the first Affiliated Hospital of Xinjiang Medical University, Urumqi, China.
authors.forename: J-Y
authors.initials: JY
authors.lastname: Shan
authors.forename: W-Z
authors.initials: WZ
authors.lastname: Ji
authors.forename: H-T
authors.initials: HT
authors.lastname: Li
authors.forename: T
authors.initials: T
authors.lastname: Tuxun
authors.forename: R-Y
authors.initials: RY
authors.lastname: Lin
authors.forename: H
authors.initials: H
authors.lastname: Wen
mesh_terms: D002908:Chronic Disease; D004443:Echinococcosis / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D015870:Gene Expression; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D016753:Interleukin-10 / Q000097:blood / Q000276:immunology*; D018664:Interleukin-12 / Q000378:metabolism; D020381:Interleukin-17 / Q000378:metabolism; D015847:Interleukin-4 / Q000378:metabolism; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D008297:Male; D060888:Real-Time Polymerase Chain Reaction; D051195:Toll-Like Receptor 2 / Q000235:genetics / Q000276:immunology*; D051197:Toll-Like Receptor 4 / Q000235:genetics / Q000276:immunology*
chemical_list: C508609:IL10 protein, human; C508717:IL17A protein, human; C508598:IL4 protein, human; D020381:Interleukin-17; C495342:TLR2 protein, human; C495345:TLR4 protein, human; D051195:Toll-Like Receptor 2; D051197:Toll-Like Receptor 4; D016753:Interleukin-10; D018664:Interleukin-12; D015847:Interleukin-4; D007371:Interferon-gamma