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  • Title: Coproduction of carcinoembryonic antigen and nonspecific cross-reacting antigen by a continuous cell line from a human pancreatic tumor.
    Author: Kuroki M, Ichiki S, Kuroki M, Matsuoka Y.
    Journal: J Natl Cancer Inst; 1982 Aug; 69(2):401-8. PubMed ID: 6810002.
    Abstract:
    A simultaneous production of nonspecific cross-reacting antigen (NCA) and carcinoembryonic antigen (CEA) by the same individual cells of an established human pancreatic cell line (QGP-1) was demonstrated by the immunoperoxidase method. Kinetics of cell proliferation and production of CEA and NCA were analyzed, and active synthesis of both antigens was found to be accompanied with the active proliferation of cultured cells. Both antigens in culture medium were purified by immunoadsorption and gel filtration. Immunochemical studies confirmed that CEA and NCA produced by the QGP-1 cells had properties identical to those of authentic CEA derived from metastatic colorectal carcinoma and to those of NCA from normal lungs, respectively.
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