Distinct expression patterns of claudin-1 and claudin-4 in intraductal papillary-mucinous tumors of the pancreas
| Autor: | Hirotoshi Kawata, Tomoko Kamiakito, Norio Takayashiki, Munetoshi Tsukahara, Akira Tanaka, Ken Saito, Hideo Nagai |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adenoma
Adult Male Pathology medicine.medical_specialty endocrine system diseases Enteroendocrine cell Pathology and Forensic Medicine Claudin-1 Tumor Cells Cultured medicine Carcinoma Humans RNA Messenger RNA Neoplasm Claudin-4 Claudin Pancreas Aged Hyperplasia Reverse Transcriptase Polymerase Chain Reaction business.industry Membrane Proteins General Medicine Middle Aged medicine.disease Adenocarcinoma Mucinous Immunohistochemistry digestive system diseases Pancreatic Neoplasms Adenocarcinoma Papillary medicine.anatomical_structure Adenocarcinoma Female business Immunostaining Carcinoma Pancreatic Ductal |
| Zdroj: | Pathology International. 55:63-69 |
| ISSN: | 1440-1827 1320-5463 |
| DOI: | 10.1111/j.1440-1827.2005.01793.x |
| Popis: | The expression of claudin-4 was investigated in human pancreas, pancreatic ductal adenocarcinomas, and intraductal papillary-mucinous tumors of the pancreas (IPMT), and compared with that of claudin-1. In human adult pancreatic specimens, both claudin-1 and claudin-4 were immunohistochemically found in main and branching pancreatic ducts, terminal ductules and acinic cells, with the exception of endocrine cells. Of 12 cases of pancreatic ductal adenocarcinoma, 11 (92%) had positive immunostaining for claudin-4, and seven (58%) for claudin-1. In 44 lesions of 22 cases of IPMT, including six hyperplastic foci distant from the main lesions, clauidin-1 was positive in three out of six (50%) hyperplastic foci, 14 out of 17 (82%) adenomas, three out of 10 (30%) borderline tumors, two out of six (33%) non-invasive carcinomas, and one out of five (20%) invasive carcinomas, producing a statistically negative correlation with histological tumor grades. In contrast, claudin-4 was negative in the six hyperplastic foci, and positive in four out of the 17 (24%) adenomas, five out of the 10 (50%) borderline tumors, five out of the six (83%) non-invasive carcinomas, and four out of the five (80%) invasive carcinomas, producing a statistically positive correlation with histological tumor grades. On study of IPMT subtypes, claudin-1 was positive in nine out of 10 (90%) clear-cell types, seven out of 20 (35%) dark-cell types, and four out of eight (50%) compact-cell types. In contrast, claudin-4 was positive in two out of the 10 (20%) clear-cell types, 13 out of the 20 (65%) dark-cell types, and three out of the eight (38%) compact-cell types. These distinct expression patterns of claudin-1 and claudin-4 suggest that both claudins serve as useful molecular markers for the tumor classification of IPMT. |
| Databáze: | OpenAIRE |
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