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American Journal of Pathology, Vol 143, 292-303, Copyright © 1993 by American Society for Investigative Pathology

REGULAR ARTICLES

Derivation of ductlike cell lines from a transplantable acinar cell carcinoma of the rat pancreas

OS Pettengill, RA Faris, RH Bell Jr, ET Kuhlmann and DS Longnecker
Department of Pathology, Dartmouth Medical School, Lebanon, New Hampshire.

Two cell lines were derived from a transplantable acinar cell carcinoma that had been established from a primary carcinoma of the pancreas in an azaserine-treated Lewis rat. The cultured tumor cells initially produced amylase, but production of exocrine enzymes ceased after 1-2 weeks in culture. The cultured cells were tumorigenic in Lewis rats, and one line produced solid tumors composed of ductlike structures surrounded by dense fibrous tissue. The second cell line produced partially solid and partially cystic tumors with a mixed phenotype of squamous, mucinous, and glandular areas when it grew in vivo following regrafting. Both cell lines lost structural and immunohistochemical acinar cell markers while acquiring duct cell markers during culture and regrafting. These studies provide strong support for the hypothesis that ductlike carcinomas can arise from neoplastic pancreatic acinar cells in rats.


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Copyright © 1993 by the American Society for Investigative Pathology.