Protection in the late stages of paracetamol-induced liver cell injury with fructose, cyslosporin A and trifluoperazine.

Abstract:

:A fixed combination of the three components, fructose, cyclosporin A and trifluoperazine (FCAT), was found to protect in the late stage of paracetamol-induced liver cell injury both in vivo and in an in vivo/in vitro system. Rats pre-induced with phenobarbitone were given a paracetamol dose of 1 g/kg i.p. The combination of FCAT was given orally 3 h or 3 and 8 h after paracetamol and was able to afford protection as seen by measurements of plasma alanine transaminase (ALT) levels at 24 h. In the in vivo/in vitro system, rats pre-induced with phenobarbitone were dosed with paracetamol 1 g/kg i.p. to initiate injury and liver slices were then taken 3, 4 and 5 h later. The liver slices were then incubated for up to 18 h with the protective agents (FCAT) and the progression of injury followed. Injury was assessed by lactate dehydrogenase (LDH) leakage into the medium and potassium content of the slices. FCAT significantly reduced the injury even as assessed after 5 h in vivo initiation and 18 h progression in vitro. Mitochondrial membrane potential was also maintained in the FCAT-treated liver slices from paracetamol-treated rats as seen by the ability to maintain a gradient of triphenyl methyl phosphonium (TPMP+) between the cell and external medium. All three compounds are required for protection, indicating that more than one event is critical to the survival of the cell and each target point needs to be protected for effective long-term cell survival. The in vivo/in vitro system has been found to give a better comparability to the in vivo situation than injury models that take 6 h or less.

journal_name

Toxicology

journal_title

Toxicology

authors

Beales D,McLean AE

doi

10.1016/0300-483x(95)03262-e

subject

Has Abstract

pub_date

1996-03-18 00:00:00

pages

201-8

issue

3

eissn

0300-483X

issn

1879-3185

pii

0300483X9503262E

journal_volume

107

pub_type

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