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Immune responses are an input source of modulation/modification for the peripheral nervous system that can result in pain and/or peripheral neuropathy. The resulting pain can be a significant debilitating component of many diseases as well as an untoward side effect of treatment. This paper briefly describes three sources of peripheral neuropathy generated in the presence of, or associated with, an immune response. Two are classified as autoimmune diseases. The body, in an attempt to rid itself of a tumor or an invading bacterial infection or virus, attacks its nervous system due to molecular mimicry; this results in, respectively, paraneoplastic neuropathy or inflammatory polyneuropathy. The third neuropathic pain syndrome is iatrogenic and occurs after administration of an antibody to GD2 ganglioside as an immunotherapy for neuroblastoma. This paper will attempt to point out some common elements in their neuropathologies and mechanisms. [ABSTRACT FROM AUTHOR]

In this paper we provide a detailed description of an experimental method for investigating the induction and resolution of recall immune response to antigen in humans in vivo. This involves the injection of tuberculin purified protein derivative ( PPD) into the skin, followed by inducing suction blisters at the site of injection, from which leucocytes and cytokines that are involved in the response can be isolated and characterized. Using this technique we found that although the majority of CD4+ T cells in the skin that are present early in the response express cutaneous lymphocyte antigen ( CLA), the expression of this marker is reduced significantly in later phases. This may enable these cells to leave the skin during immune resolution. Furthermore, interleukin ( IL)-2 production can be detected both in CD4+ T cells and also in the blister fluid at the peak of the response at day 7, indicating that mediators found in the blister fluid are representative of the cytokine microenvironment in vivo. Finally, we found that older humans have defective ability to respond to cutaneous PPD challenge, but this does not reflect a global immune deficit as they have similar numbers of circulating functional PPD-specific CD4+ T cells as young subjects. The use of the blister technology enables further characterization of the skin specific defect in older humans and also general mechanisms that govern immune regulation in vivo. [ABSTRACT FROM AUTHOR]

T cell lines with defined cytokine profiles are an invaluable tool for assessing the control of immune responses both in vitro and in vivo. Production of such cell lines can be complex and time-consuming. Here we present a powerful technique to assay the cytokines produced by T cells activated polyclonally or with specific antigens. This paper presents a detailed methodology for the identification and isolation of cytokine-producing T cells activated with the artificial superantigen, CytoStim, or viral and fungal antigens. These cells can be analysed for different cytokines simultaneously, or cultured further to rapidly establish T cell lines making known cytokine types. We highlight the enumeration, isolation and phenotype of interleukin-17-producing T cells, and the rapid generation of virus-specific Th1 T cell lines. [ABSTRACT FROM AUTHOR]