title: [Predisposition of subclones of pancreatic carcinoma cells, AsPC-1, to changes in functional and histopathological features of xenograft tumors with response to extracellular matrix].
abstract: We cloned two characteristics subclones from a human pancreatic carcinoma cell line, AsPC-1, according to their distinctive cell shapes; one an epithelial morphology and designated as "Beto-1" and the other a fibroblastic morphology and designated as "Fib-1". Fib-1 grew faster than Beto-1, but the growth rate of the cells on plastics was as high as that of the cells on the extracellular matrix extracts, matrigel. The pancreatic tumor-marker proteins, alpha-amylase, insulin, CEA, POA, PP, and AFP, but not CA 19-9, were positive in both subclones. Type IV collagen, fibronectin, and laminin, were all positive in both subclones; furthermore, the integrin adhesion receptor molecules, alpha 2 beta 1-subunit, alpha 5-subunit, and alpha 6-subunit, were also positive. The intercellular adhesion molecules, E-cadherin and ICAM-1, were detected in Beto-1 and Fib-1, respectively. Although both subclonal cells attached to type IV collagen, fibronectin, and laminin in a concentration-dependent manner. Beto-1 adhered most strongly to type IV collagen and Fib-1 attached most strongly to fibronectin. Beto-1 showed morphological differentiation on matrigel and in the tumor xenografts. Further, there was more fibroblast infiltration and type IV collagen production in Beto-1 tumor tissues, and more lymphocyte and neutrophil infiltration in tumors of Fib-1 which expressed ICAM-1 proteins. This study indicated that the histological diversity observed in the pancreatic carcinoma was evolved from the composition of the tumor cells which express the specific adhesion receptors.
authors.affiliation: Department of Surgery, Nippon Medical School, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Aida
authors.forename: M
authors.initials: M
authors.lastname: Onda
authors.forename: G
authors.initials: G
authors.lastname: Asano
authors.forename: N
authors.initials: N
authors.lastname: Nakazawa
mesh_terms: D000818:Animals; D014408:Biomarkers, Tumor / Q000032:analysis; D015815:Cell Adhesion Molecules / Q000032:analysis; D002455:Cell Division; D002999:Clone Cells; D005109:Extracellular Matrix / Q000502:physiology*; D016326:Extracellular Matrix Proteins / Q000032:analysis; D006801:Humans; D016023:Integrins / Q000032:analysis; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D010190:Pancreatic Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure; D014183:Transplantation, Heterologous
chemical_list: D014408:Biomarkers, Tumor; D015815:Cell Adhesion Molecules; D016326:Extracellular Matrix Proteins; D016023:Integrins