Characterization of alkaline phosphatase genes expressed in seminoma by cDNA cloning.

Shigenari, A; Ando, A; Baba, T; Yamamoto, T; Katsuoka, Y; Inoko, H · Cancer Res · 1998

basic_science · Level V

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Abstract

Two members of a placental alkaline phosphatase (PLAP) family, PLAP and PLAP-like or germ cell alkaline phosphatase, are aberrantly expressed in tumors of ecotropic origin. To characterize alkaline phosphatase induced in seminoma, alkaline phosphatase cDNA clones were isolated from a cDNA library constructed from seminoma cells and characterized by nucleotide sequence determination. Thus, isolated cDNA clones were classified into two types, germ cell alkaline phosphatase (PLAP-like) and liver/bone/kidney-type alkaline phosphatase (L/B/K AP). These results suggest that other than the PLAP family members, the expression of L/B/K AP is enhanced in seminoma and can serve as a tumor marker in seminoma.

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