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A monoclonal antibody KIS-1 recognizing a new membrane antigen on human squamous-cell carcinoma

✍ Scribed by Uhi Toh; Hideaki Yamana; Hiromasa Fujita; Yuji Toh; Teruhiko Fujii; Keisuke Kubo; Akira Yamada; Shigeki Shichijo; Kyogo Itoh

Publisher
John Wiley and Sons
Year
1996
Tongue
French
Weight
867 KB
Volume
66
Category
Article
ISSN
0020-7136

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✦ Synopsis

A KIS-I monoclonal antibody (MAb) &GI, K) recognizing a membrane antigen on human squamous-cell carcinomas (SCC) was developed to understand their antigenicity using an esophageal SCC as an immunogen. The KIS-I MAb recognized a membrane antigen on a majority of esophageal, lung, and oralcavity SCC by immunofluorescent and by immunohistochemical analyses. In contrast, it showed little reactivity to adenocarcinomas from different organs, and none to keratinocyte cell lines. This MAb showed reactivity to the cells in the basal layer of normal esophageal epithelium adjacent to the esophageal SCC, but none of the other normal tissues, including esophageal epithelium far from the SCC and that from patients with non-malignant disease. The KIS-I MAb immunoprecipitated a 46-kDa membrane protein of the esophageal SCC in nonreducing and in reducing conditions. It recognized the 46-and the 40-kDa proteins of the esophageal SCC by immunoblot analysis. These results suggest that the KIS-I MAb recognizes a new membrane antigen preferentially expressed on SCC, and that this antigenicity is shared only by the cells in the basal layer of the esophageal epithelium adjacent to SCC. The KIS-I MAb may be a new tool for understanding the antigenicity of SCC. o 1996 Wiley-Liss,

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