Abstract:
INTRODUCTION:Adhesion of tumor cells to extracellular matrix (ECM) proteins plays an important role in tumor invasion and metastasis. AIMS:To investigate the expression of integrins in human pancreatic cancer cell lines and its alteration by interleukin (IL)-1alpha to examine the mechanism of adhesion of metastatic human pancreatic cancer cells to ECM proteins. METHODOLOGY:The expression of integrin subunits and their alteration by IL-1alpha were examined by flow-cytometric analysis and cellular enzyme-linked immunosorbent assay in three metastatic human pancreatic cancer cell lines (AsPC-1, BxPC-3, and SW1990) and two nonmetastatic cancer cell lines (PaCa-2 and PANC-1). In addition, assays of cancer cell adhesion to ECM proteins were performed to investigate if increased integrin expression actually affected the adhesive interaction between cancer cells and the putative integrin ECM ligands. RESULTS:The alpha(6) subunit expressed in metastatic cancer cells was enhanced by IL-1alpha. Metastatic cancer cells also showed preferential adherence to laminin compared with nonmetastatic cancer cells, and this was enhanced by IL-1alpha. CONCLUSION:In pancreatic cancer, the enhancement of alpha(6)beta(1) integrin by IL-1alpha through IL-1 receptor type I, as well as the expression of alpha(6)beta(1) integrin, plays an important role in metastasis formation.
journal_name
Pancreasjournal_title
Pancreasauthors
Sawai H,Yamamoto M,Okada Y,Sato M,Akamo Y,Takeyama H,Manabe Tdoi
10.1097/00006676-200111000-00011subject
Has Abstractpub_date
2001-11-01 00:00:00pages
399-405issue
4eissn
0885-3177issn
1536-4828journal_volume
23pub_type
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