Accelerated breakdown of immunological tolerance following whole body irradiation.

O. Makela,G. Nossal

Published 1962 in Journal of Immunology

ABSTRACT

Rats were made unresponsive to mouse erythrocytes or bovine serum albumin by a series of injections starting at birth. The unresponsiveness, though not always complete, remained constant in a given animal if antigen injections were continued. In animals irradiated with 550 or 600 r the tolerance usually broke down, with the formation of substantial amounts of antibody. Normal animals also irradiated at a similar age and given repeated injections of mouse erythrocytes formed excess antibody during the 5th to the 13th postirradiation week. By contrast, irradiated rats receiving a single injection of bovine serum albumin in Freund's adjuvant formed less antibody than did nonirradiated controls. The theoretical implications of the work are discussed.

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