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7183415 
Journal Article 
Protection against liver injury by PGE1 or anti-TNF-alpha is associated with a reduction of TNF-R1 expression in hepatocytes 
Lozano, JM; Collado, JA; Medina, T; MuntanĂ©, J; , 
2003 
Scandinavian Journal of Gastroenterology
ISSN: 0036-5521
EISSN: 1502-7708 
TAYLOR & FRANCIS AS 
OSLO 
1169-1175 
English 
Tumour necrosis factor-alpha (TNF-5) has been shown to exacerbate or protect against liver injury in different experimental models. In a previous study, we observed that enhancement of TNF-alpha expression in hepatocytes by prostaglandin E1 (PGE1) pre-administration induced iNOS expression and cytoprotection against experimental liver injury in rats. Nevertheless, the reduction of TNF-alpha bioactivity by anti-TNF-alpha antibodies also reduced liver injury by D-GalN. The purpose of the present study was to evaluate whether protection by PGE1 or anti-TNF-alpha was related to a common effect on the membrane-bound TNF-alpha receptor expression.