ISSN:
1432-1211
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Abstract Lymphocytes from chickens homozygous (B 2 B 2) at the major histocompatibility complex (MHC) were tested for cytotoxic activity against five types of target chicken embryo fibroblasts (CEF). Lymphocytes from B2B2 chickens bearing RSV-induced tumors lysed in vitro targets of B 2 B 2 and B 5 B 5 RSV-infected CEF and B 5 B 5 normal CEF, but did not lyse B 2 B 2 and B 24 B 24 normal CEF. Lymphocytes from normal B 2 B 2 chickens did not lyse any of the five types of CEF targets. Alloantisera absorption studies showed that both RSV-infected and uninfected CEF shared alloantigens, in particular B-F alloantigens, with syngeneic erythrocytes. Absorption with B 2 B 2 RSV-infected CEF significantly lowered the titer of B 2 B 2 anti-B 5 B 5 alloantisera. Cross-reactivity between B 5 antigen(s) and tumor-associated antigen was suggested and the nature of the cross-reactivity was discussed. It is hypothesized that this cross-reactivity prevents B 5 B 5 chickens from recognizing RSV-induced tumors as foreign, enhances tumor growth and leads to death of the host.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00524603
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