Survival and function of rat hepatocytes cocultured with nonparenchymal cells or sinusoidal endothelial cells on biodegradable polymers under flow conditions.
OBJECTIVE
The authors have investigated hepatocyte transplantation using biodegradable polymer scaffolds as a possible treatment of end-stage liver disease. The purpose of this study was to investigate the survival rate and function of hepatocytes alone or cocultured with other cell types on 3-dimensional biodegradable polymers for 7 days under continuous flow conditions in vitro.


METHODS
Hepatocytes (group 1, n = 8), hepatocytes with nonparenchymal cells (group 2, n = 7), or hepatocytes with sinusoidal endothelial cells (group 3, n = 6) were isolated from Lewis rats and seeded onto the polymer scaffolds. The polymer devices subsequently were placed under continuous flow conditions for 7 days. Albumin production from the constructs was measured each day, and urea nitrogen synthesis was examined on day 7. The devices also were examined by histology at day 7.


RESULTS
Histology results showed the presence of numerous viable hepatocytes on polymer devices, with no differences in hepatocyte viability between the 3 groups. Albumin secretion in the culture medium gradually decreased by day 7. There also were no significant differences in albumin production or urea nitrogen synthesis between the 3 groups at day 7.


CONCLUSIONS
Hepatocytes could survive on the 3-dimensional polymer scaffolds under flow conditions for 7 days, and albumin secretion and urea synthesis of hepatocytes were seen at day 7. Nonparenchymal cells and sinusoidal endothelial cells had no measurable effect on hepatocyte function in our continuous flow culture system.
Kaihara
S
S
Department of Surgery, Harvard Medical School and Massachusetts General Hospital, Boston 02114, USA.
Kim
S
S
Kim
B S
BS
Mooney
D J
DJ
Tanaka
K
K
Vacanti
J P
JP
D000818:Animals; D017690:Cell Transplantation; D018920:Coculture Techniques / Q000379:methods*; D022781:Hepatocytes / Q000378:metabolism*; D008297:Male; D011108:Polymers; D051381:Rats; D011917:Rats, Inbred Lew; D016019:Survival Analysis
D011108:Polymers