| 摘要 |
A tumor-specific polypeptidic antigen, which is coded at least partially by an intron of an exon-coded tumor antigen, and which is obtained by (a) reverse transcriptase PCR from mRNA isolated from the soluble cytoplasmic fraction of a tumor cell, whereby nucleic acid fragments which hybridize under stringent conditions with intron sequences of an exon-coded tumor antigens are used as a primer, (b) isolation of the product of said PCR, expression of said PCR product or of a fragment thereof in a host cell, and isolation of said tumor-specific antigen which is coded by said PCR product or a fragment thereof which hybridizes also with exon sequences of said antigen, is useful for diagnosis and therapeutic use in connection with tumor diseases. |
