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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Specific restoration of delayed hypersensitivity by lymphoid tissue extracts.

Mice lose demonstrable delayed hypersensitivity (DH) to DNFB, picryl chloride, or sheep red blood cells. Reconstitution of immune responsiveness can be accomplished by administration of cell-free lysates of spleens from mice with active DH to structurally related, but not to unrelated antigens. Peritoneal exudate cell lysates from mice with active DNFB-DH also restore DH to this antigen. Sera from sensitized mice, and sera and lymphoid tissue extracts from unsensitized mice are without activity. The restorative property of splenic lysates from DNFB-sensitized mice is unstable at 56 degrees C, not sedimented at 90,000 X G and inactivated by trypsin or magnesium ions. The presence of unexpressed, restorable DH may provide a biologic basis for the so called "transfer factor" phenomenon.[1]

References

  1. Specific restoration of delayed hypersensitivity by lymphoid tissue extracts. Green, J.A., Williams, J., Levy, H.B. J. Immunol. (1977) [Pubmed]
 
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