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- Newsgroups: sci.med.aids
- Path: sparky!uunet!cs.utexas.edu!usc!ucla-cs!usenet
- From: Billi Goldberg <bigoldberg@igc.apc.org>
- Subject: Romagnani and Th1/Th2 Subsets
- Message-ID: <1992Dec30.053823.13000@cs.ucla.edu>
- Note: Copyright 1992, Dan R. Greening. Non-commercial reproduction allowed.
- Sender: usenet@cs.ucla.edu (Mr Usenet)
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- Archive-Number: 6689
- Organization: unspecified
- Date: Tue, 29 Dec 92 20:58:57 PST
- Approved: david@stat.com (David Dodell)
- Lines: 32
-
- The evidence is building up slowly but surely for the existence of Th1
- and Th2 subsets in humans as in murine samples. Again, Th1 appears to be
- the only way to control the intracellular pathogens involved in AIDS.
- The antibody (Th2) response appears to work in HIV+ individuals; it is
- only the Th1 or cell mediated response that is impaired.
- ------------------------------------------------------------------------
- Romagnani S. Human TH1 and TH2 Subsets: Regulation of Differentiation
- and Role in Protection and Immunopathology. International Archives of
- Immunology December 1992;98:279-285.
-
- Correspondence to: Dr. S. Romagnani, Division of Clinical Immunology and
- Allergy, University of Florence, Institute of Clinical Medicine 3 85,
- Viale Morgagni, I-50134 Florence (Italy).
-
- Abstract: A large body of evidence has accumulated suggesting the
- existence of human TH1 and TH2 subsets, reminiscent of those described
- for mouse T cells. Human TH1 cells develop in response to intracellular
- bacteria and viruses, do not provide help for IgE synthesis and are
- cytolytic. Human TH2 cells develop in response to allergens and helminth
- components, provide help for IgM, IgG, IgA, and IgE synthesis and lack
- cytolytic potential. The cytokine profile of 'natural' immunity (high
- IFN-gamma and no IL-4 production) evoked by intracellular bacteria and
- viruses that activate both macrophage and NK cells, probably determines
- the phenotype of the subsequent specific TH1 response. Absence or low
- concentration of IFN-gamma and early production of IL-4 by non-T cells
- or by T cells themselves, that occur in response to allergens and
- helminth components, probably favor the development of TH2 cells. TH1
- and TH2 cells play different roles not only in protection against
- exogenous offending agents, but also in immunopathology. TH1 cells are
- involved in contract dermatitis, organ-specific autoimmunity and
- allograft rejection. TH2 cells are responsible for the initiation of the
- allergic cascade.
-