Abstract
The present study was carried out to determine whether the MHC-restricted and MHC-unrestricted B cell activation pathways mediated by a single cloned Th cell are separable, and whether these two pathways are mediated by distinct mechanisms. It was demonstrated that the two B cell activating functions of a single cloned Th cell could be separated by their sensitivity to irradiation. It was shown that MHC-restricted B cell activation is mediated by a radiosensitive Th cell function, whereas MHC-unrestricted B cell activation is mediated by a radioresistant function of the same Th cell. In addition, it was shown that recombinant IL 2 can restore or replace the radiosensitive component of MHC-restricted cognate helper function.
- Copyright © 1987 by American Association of Immunologists
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