Decreased TLR2 signal expression in peripheral blood mononuclear cell from patients with cryptococcal meningitis.
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.
['Zhang|Lei|L|', 'Liu|Tingting|T|', 'Kong|Wei|W|', 'Zhang|Weiwei|W|', 'Gu|Mingli|M|', 'Chen|Yan|Y|', 'Deng|Anmei|A|', 'Chen|Sunxiao|S|']
D000328:Adult D015153:Blotting, Western D005260:Female D020869:Gene Expression Profiling D006801:Humans D007108:Immune Tolerance D007963:Leukocytes, Mononuclear D008297:Male D016919:Meningitis, Cryptococcal D008875:Middle Aged D060888:Real-Time Polymerase Chain Reaction D051195:Toll-Like Receptor 2 D055815:Young Adult
peripheral blood mononuclear cell cryptococcal meningitis Toll-like receptors 2