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Specific depression of the antitumor cellular immune response with autologous tumor homogenate
A momogenate of an SV40-transformed firbosarcoma of BALB/c mice (E4 tumor) injected i.p. into E4, tumor-immune syngeneic mice specifically depressed their cell-mediated immune responses to autologous tumor cells, as measured by a radioisotopic foot pad assay. The fraction of the tumor homogenate that brought about this depression was present in the high-speed supernatant and pellet of a 3 M KCl extract of the tumor. The specificity of the depression was shown in three ways: (a) the serum of E4pmid:164281 fatcat:bv4ospc2knhx7bgasaju4r37ry