Abstract:
:Although pancreatic adenocarcinoma has become one of the best characterized malignant diseases, severe diagnostic and therapeutic problems are still associated with this disease. The establishment of a molecular model of pancreatic carcinogenesis may provide tools that could result in earlier diagnosis of this disease and, in turn, improves prognosis. Since pancreatic adenocarcinoma seems to originate in epithelial cells in the pancreatic ducts, cultivation of native pancreatic duct epithelial cells (PDEC) is the initial step in the establishment of an in vitro model of pancreatic carcinogenesis. As these native cells survive only a short period in culture, the aim of this study was to establish a stable pancreatic duct cell line by immortalization with the SV40 large T antigen. Furthermore, initial steps in pancreatic carcinogenesis should possibly be imitated by additional transfections of mutated ki-ras and/or mutated p53 genes. By optimization of the isolation protocol and the culture medium, yield as well as proliferative activity of isolated PDEC was increased considerably. Transfection of SV40 large T antigen resulted in an increase in the proliferative lifetime of the isolated cells, but no real immortal phenotype was obtained. Moreover, one step in the transformation from the normal to the malignant phenotype was imitated successfully by additional transfection of mutated ki-ras.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Jesnowski R,Müller P,Schareck W,Liebe S,Löhr Mdoi
10.1111/j.1749-6632.1999.tb09509.xsubject
Has Abstractpub_date
1999-06-30 00:00:00pages
50-65eissn
0077-8923issn
1749-6632journal_volume
880pub_type
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