International Immunology, Vol. 15, No. 5, pp. 593-609,
May 2003
© 2003 Japanese Society for Immunology
A computerized model for the selfnon-self discrimination at the level of the Th (Th genesis). II. The behavior of the system upon encounter with non-self antigens
,11 Conceptual Immunology Group, The Salk Institute, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA
Dr Rodney Eric Langman passed away on 13 August 2002 after a long and courageous struggle with lung cancer
Correspondence to: M. Cohn; E-mail: cohn{at}salk.edu
Transmitting editor: S. M. Hedrick
In the final analysis, the self (S)non-self (NS) discrimination is regulated by the sufficiency or insufficiency of effector Th (eTh) specific for the given antigen. We have described a model (Th genesis) for the origin of eTh based on an antigen-independent pathway from initial state Th (iTh) to eTh, and on obligatory associative recognition of antigen (ARA) by an iTh and an eTh in order for the iTh to be activated. A computer analysis (referred to as Th genesis) was developed to evaluate this model that is extended here to describe the response to NS antigen. Th genesis fills in the missing element of the two-signal or ARA model for the SNS discrimination, i.e. the origin of the primer eTh. The conclusions from this analysis are compared with those of the other models for the origin of eTh.
Keywords: autoimmunity, computer simulation, immunopathology, origin of effector Th, selfnon-self discrimination, tolerance, two-signal model
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