PubMed · 1132529
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E R Unanue. 1975. Function of macrophages. Introduction.. https://pubmed.ncbi.nlm.nih.gov/1132529/
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Production of type I interferon (IFN-alpha/beta) by virus-infected cells is the central event in their antiviral immune responses. In mammalian cells, IFN-alpha/beta gene transcription is induced through distinct signaling pathways by viral infection or by treatment with double-stranded (ds) RNA, which is an intermediate of virus replication. Toll-like receptor 3 (TLR3) was found to recognize dsRNA and transmit signals to activate NF-kappaB and the IFN-beta promoter. Recent identification of the TLR3-adaptor protein and its downstream signaling molecules, which are involved in IFN-alpha/beta production, revealed a novel IFN-inducing pathway for an anti-viral immune response. Here, we summarize the current knowledge of TLR3-mediated immune responses.
A whole-blood lymphocyte proliferation assay was compared to a standard method requiring the isolation of peripheral blood mononuclear cells (PBMC). Both methods were used to measure the cell-mediated immune responses to rabies in rabies-vaccine recipients. Whole-blood cells gave moderately higher lymphoproliferative responses in terms of stimulation indices than did separated-PBMC. The results obtained from these two methods can be considered equivalent for the purpose of quantitating cellular reactivity to rabies. The use of whole blood has advantages over the standard isolated-PBMC method.
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