Interleukin 10 and its role in the regulation of the cell-mediated immune response in syphilis

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M Lusiak1, J Podwińska

  • 1Department of Medical Immunology, Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw. marzena@immuno.iitd.pan.wroc.pl

Archivum Immunologiae Et Therapiae Experimentalis
|January 30, 2002
PubMed

Data concerning interleukin 10 (IL-10), a cytokine of Th2 lymphocytes, and its inhibition of Th1 lymphocytes from secreting IL-2 and interferon (IFN) are presented. It has been indicated that IL-10 also inhibits other cells from producing IL-12 and nitric oxide (NO). It is known that all these factors take part in the cell-mediated immune response and immunity. This inhibition may facilitate the multiplication of Treponema pallidum and the development of disease despite the presence of immunologically competent cells. It has also been demonstrated that in late latent syphilis, when Th1 lymphocytes are not able to produce IL-2 and IFN, the cells are able to produce only IL-12 and NO. This fact seems to suggest that these factors take over the immune function when cells are stimulated again by treponemes which, after many years of latency, begin to multiply. Thus, a high level of IL-12 and NO seems to be an indicator of the development of the third stage of disease.

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