Abstract
The Shwachman-Bodian-Diamond syndrome (SBDS) protein is a member of a highly conserved family which influences RNA activation and is associated with pancreatic, skeletal and bone marrow deficiencies, as well as hematological malignancies. In this study, the expression and localization of SBDS were investigated in normal human pancreatic tissues, chronic pancreatitis (CP) tissues, primary and metastatic pancreatic ductal adenocarcinoma (PDAC) tissues, as well as in cultured pancreatic cancer cell lines by immunohistochemistry, immunoblotting and immunocytochemistry. In the normal pancreas, SBDS was localized in the cytoplasm of islet cells and ductal cells. In CP tissues, SBDS was found in the cytoplasm of ductal cells, tubular complexes, stromal fibroblasts and in PanIN1-2 lesions. In PDAC tissues, SBDS exhibited cytoplasmic and occasionally nuclear localization in tubular complexes, PanIN1-3 lesions, cancer cells, and stromal fibroblasts. Different levels of SBDS protein were detected in cultured pancreatic cancer cell lines. SBDS is expressed in normal, CP, and PDAC tissues, as well as in pancreatic cancer cell lines. The different expression and localization patterns suggest a role of SBDS in the pathogenesis of, or response to, inflammatory and neoplastic pancreatic diseases.
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