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• W2016473444 abstract "As part of our attempt to develop a hybrid artificial liver support system using cultured hepatocytes, we investigated the long-term metabolic function of hepatocytes incubated in a packed-bed type reactor using reticulated polyvinyl formal (PVF) resin as a supporting material. Long-term (up to 1 week) perfusion culture experiments using the packed-bed reactor (20 mm i.d.) loaded with 500 PVF resin cubes (mean pore size 250 mum, 2 x 2 x 2 mm), together with conventional monolayer culture experiments as controls, were performed in serum-free or serum-containing medium. Ammonium metabolism and urea synthesis activities were evaluated quantitatively based on reaction kinetic analyses. Initial rates of ammonium metabolism and urea-N synthesis, as well as GPT enzyme activities, were adopted as indexes of the metabolic performance of the reactor and activities of the cultured hepatocytes.When serum-free medium was used in the perfusion cultures, ammonium metabolic and urea-N synthetic rates showed significant decay with elapse of the culture period, being less than 10% of those measured on day 1. This loss of activity was more prominent in the perfusion culture than in the monolayer cultures using this medium. In contrast, when serum-containing medium was used, approximately 50% of these activities obtained on day 1 were maintained even at the end of the cultures both in the perfusion and monolayer culture experiments.We concluded that the packed-bed reactor using PVF resin enabled high-density culture of hepatocytes, and showed a satisfactory ability to maintain the metabolic function of immobilized hepatocytes for relatively long periods of up to 1 week. This type of reactor is thus considered to represent a breakthrough in overcoming the difficulties involved in the development of a hybridtype artificial liver support system. (c) 1994 John Wiley & Sons, Inc." @default.
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• W2016473444 date "1994-03-25" @default.
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• W2016473444 title "Long-Term continuous culture of hepatocytes in a packed-bed reactor utilizing porous resin" @default.
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• W2016473444 doi "https://doi.org/10.1002/bit.260430713" @default.
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