Immunohistochemical Identification of Transforming Growth Factor-.BETA. and Its Binding Protein in Human Gastrointestinal Carcinoma.

Abstract
We attempted to clarify the tissue localization of TGF-beta and latent TGF-beta binding protein (LTBP) in human gastrointestinal carcinomas by immunohistochemistry. The immunoreactivity for TGF-beta was observed in both carcinoma cells and stromal cells, particularly in diffuse-type gastric carcinoma. The immunoreactivity for LTBP was observed only in stromal cells. These results suggest that both carcinoma cells and stromal cells may produce TGF-beta, and that only stromal cells may produce LTBP in gastrointestinal carcinoma.

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