title: Decreased TLR2 signal expression in peripheral blood mononuclear cell from patients with cryptococcal meningitis.
abstract: Toll-like receptors are the most important pattern recognition receptors that can recognize conserved molecular structures shared by large groups of pathogens. Here, the aim was to determine the expression and role of TLR2 in peripheral blood mononuclear cells (PBMCs) from patients with cryptococcal meningitis and healthy controls. TLR2 expression was measured using RT-PCR and western blotting. The role of TLR2 in cytokine production by PBMCs after Cryptococcus neoformans exposure was assessed in healthy controls prior to incubation with anti-TLR2. TLR2 mRNA and protein expression were both weaker in patients with cryptococcal meningitis than in healthy controls. Furthermore, pre-incubation of PBMCs from healthy donors with anti-TLR2 led to reduced expression of IFN-γ and IL-12p70, but not of IL-4 and IL-10, following C. neoformans stimulation. Our results suggest that impaired expression of TLR2 may be involved in defective host defense to C. neoformans through an attenuated Th1 response.
authors.affiliation: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Liu
authors.affiliation: Department of Dermatology, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Kong
authors.affiliation: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China.
authors.forename: Mingli
authors.initials: M
authors.lastname: Gu
authors.affiliation: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China.
authors.forename: Anmei
authors.initials: A
authors.lastname: Deng
authors.affiliation: Department of Dermatology, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, China.
authors.forename: Sunxiao
authors.initials: S
authors.lastname: Chen
mesh_terms: D000328:Adult; D015153:Blotting, Western; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D007108:Immune Tolerance; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D008297:Male; D016919:Meningitis, Cryptococcal / Q000276:immunology*; D008875:Middle Aged; D060888:Real-Time Polymerase Chain Reaction; D051195:Toll-Like Receptor 2 / Q000032:analysis*; D055815:Young Adult
chemical_list: C495342:TLR2 protein, human; D051195:Toll-Like Receptor 2
keywords: Toll-like receptors 2; cryptococcal meningitis; peripheral blood mononuclear cell