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Characterization of differentiated syrian golden hamster pancreatic duct cells maintained in extended monolayer culture

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Epithelial cells isolated from fragments of hamster pancreas interlobular ducts were freed of fibroblast contamination by plating them on air-dried collagen, maintaining them in serum-free Dulbecco's modified Eagle's (DME):F12 medium suppleneted with growth factors, and selecting fibroblast-free aggregates of duct cells with cloning cylinders. Duct epithelial cells plated on rat type I collagen gel and maintained in DME:F12 supplemented with Nu Serum IV, bovine pituitary extract, epidermal growth factor, 3,3′, 5-triodothyronine, dexamethasone, and insulin, transferrin, selenium, and linoleic acid conjugated to bovine serum albumin (ITS+), showed optimal growth as monolayers with a doubling time of about 20 h and were propagated for as long as 26 wk. Early passage cells consisted of cuboidal cells with microvilli on their apical surface, complex basolateral membranes, numerous elongated mitochondria, and both free and membrane-bound ribosomes. Cell grown as monolayers for 3 mo. were more flattened and contained fewer apical microvilli, mitochondria, and profiles of rough surfaced endoplasmic reticulum; in addition, there were numerous autophagic vacuoles. Functional characteristics of differentiated pancreatic duct cells which were maintained during extended monolayer culture included intracellular levels of carbonic anhydrase and their capacity to generate cyclic AMP (cAMP) after stimulation by 1×10−6 M secretin. From 5 to 7 wk in culture, levels of carbonic anhydrase remained stable but after 25 to 26 wk decreased by 1.9-fold. At 5 to 7 wk of culture, cyclic AMP increased 8.7-fold over basal levels after secretin stimulation. Although pancreatic duct cells cultured for 25 to 26 wk showed lower basal levels of cAMP, they were still capable of generating significant levels of cAMP after exposure to serretin with a 7.0-fold increase, indicating that secretin receptors and the adenyl cyclase system were both present and functional. These experiments document that pancreatic duct monolayer cultures can be maintained in a differentiated state for up to 6 mo. and suggest that this culture system may be useful for in vitro physiologic and pathologic studies.

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This research was supported by grant CA34051 from the National Cancer Institute, Bethesda, MD.

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Hubchak, S., Mangino, M.M., Reddy, M.K. et al. Characterization of differentiated syrian golden hamster pancreatic duct cells maintained in extended monolayer culture. In Vitro Cell Dev Biol 26, 889–897 (1990). https://doi.org/10.1007/BF02624614

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