PMID: 6159021Sep 1, 1980Paper

Antigenic similarity between stimulators of immunogenesis of a polypeptide nature from the thymus and cerebral cortex

Biulleten' eksperimental'noĭ biologii i meditsiny
G A Belokrylov

Abstract

Rabbit antisera against low molecular weight polypeptides from the thymus (thymosin and thymarin), cortex (cortexin) and white matter of the brain of the calves were cross-absorbed with these polypeptides and tested in the complement fixation test with these preparations and in the complement-dependent cytotoxicity test with thymic and bone marrow cells. The results showed that thymosin, thymarin and cortexin are antigenically similar, but differ in antigenic structure from polypeptide from white matter of the brain. Biological effect of polypeptides from the thymus and brain cortex is connected with thymus-depending lymphocytes and does not depend on B-cells. Cross absorbtion revealed that antisera against polypeptides from thymus and cortex of the brain contain antibody both against common antigens and antigens specific for appropriate preparation only. Antigenic set of polypeptide from the thymus (thymarin) corresponds more closely to thymic antigen as compared to polypeptide from the brain cortex (cortexin).

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