alexa The expression of TLR9 in human cutaneous leishmaniasis is associated with granuloma


Journal of Clinical & Experimental Dermatology Research

Author(s): Tuon FF

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The Toll-like receptor (TLR) signalling pathway is the first system that defends against Leishmania. After recognising Leishmania as nonself, TLRs trigger NF-κB expression. NF-κB proceeds to the nucleus and promotes the transcription of pro-inflammatory cytokines. TLR9 is thus an important factor in the induction of an effective immune response against Leishmania. We examined the pattern of TLR9 expression in 12 patients with cutaneous leishmaniasis caused by Leishmania braziliensis detected by polymerase chain reaction. Normal skin was analysed as a negative control. TLR9 expression was examined in the dermis and epidermis by immunohistochemical analysis of paraffin-embedded biopsy tissue. TLR9 expression was primarily observed in the granuloma. The protein was detected in a few cells in the dermis. A lower expression level was detected in the epidermis of patients with leishmaniasis when compared with normal skin. The presence of TLR9 in the skin of patients with cutaneous leishmaniasis is associated with granuloma and expressed by macrophages.

This article was published in Parasite Immunol and referenced in Journal of Clinical & Experimental Dermatology Research

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