[McAb LC-1 against human lung cancer].

Recently Ge et al reported LAC-122, LAC-210 and LAC-163 McAbs against Human non-small cell lung cancer and LSC McAbs against human lung small cell carcinoma. The immunotoxin, composed of McAb LAC-122 conjugated with Ricin A chain has been reported to have the significant cytotoxic effect in vitro on lung adenocarcinoma cell line SPC-A-1 by Tan et al. The LAC-122 alone has no effect on this target cell in the presence of complement from human, rabbit or guinea pig. The tumor associated antigens of human lung cancer have been recognized for many years, but only few reports deal with the common antigens or common epitopes of the lung cancer. From one fusion, 20 hybrids had been observed, all of these culture supernatants could react with target cell by IF. One of them after 4 th cloning, immunoglobulin isotype of the monoclonal antibody thus far obtained belonged to IgM and named to LC-1. Table 1 showed the results of ABC staining of LC-1 with a variety of tumors, normal adult and fetal tissues. From 12 non-small cell lung cancers, including 7 lung adenocarcinoma, 2 lung squamous carcinoma, 3 lung giant cell carcinoma, only one adenocarcinoma gave negative staining. As for 6 small cell lung cancers, all of them showed the positive reaction. It could be also reacted with 11 other tumors.(ABSTRACT TRUNCATED AT 250 WORDS)