[Transplantation of allogeneic hepatocytes without immunosuppression: long-term survival].
Hepatocyte transplantation could be an alternative to whole liver transplantation. Allogeneic hepatocytes are rejected if transplanted without immunosuppression. The aim of this study was to transplant allogeneic hepatocytes in the peritoneum and to protect them from rejection by encapsulation in a new semi-permeable membrane.


METHODS
rats hepatocytes were encapsulated in hydrogel-based hollow fibers, obtained from AN69 polymer, before being transplanted into the peritoneum of rats. Outcome of allogeneic hepatocytes encapsuled in hollow fibers was compared to that of free allogeneic hepatocytes. Cell viability was assessed by erythrosine exclusion, morphology by electronic microscopy and function by albumin release.


RESULTS
Up to 90 days, viability of allogeneic hepatocytes in hollow fibers was above 80%. The morphology remained normal at electronic microscopy. Albumin release was 16.5 +/- 0.3 (day 15), 14.2 +/- 2.0 (day 30), 8.8 +/- 0.1 (day 60) and 11.4 +/- 0.3 mg/24h/10(6) hepatocytes (day 90). Free hepatocytes did not survive at day 15.


CONCLUSIONS
Viability and function of encapsulated allogeneic hepatocytes were maintained up to 90 days after transplantation, without immunosuppression.
Balladur
P
P
Centre de Chirurgie digestive, INSERM Unité 402, Hôpital Saint-Antoine, Paris.
Honiger
J
J
Calmus
Y
Y
Vaubourdolle
M
M
Delelo
R
R
Capeau
J
J
Nordlinger
B
B
D000818:Animals; D002470:Cell Survival; D006085:Graft Survival; D007165:Immunosuppression Therapy; D008099:Liver / Q000166:cytology*; D016031:Liver Transplantation / Q000379:methods*; D008297:Male; D051381:Rats; D011917:Rats, Inbred Lew; D013997:Time Factors; D014184:Transplantation, Homologous
Transplantation d'hépatocytes allogéniques sans immunosuppression: survie à long terme.