Abstract:
:Induction of hypoxia for 2.5 h in perfused cat livers resulted in a 10-fold increase in cathepsin D and a 15-fold increase in lactic dehydrogenase (LDH) activities in the perfusate and a 42% depression of the clearance rate of particles by the reticuloendothelial system (RES). Addition of 10(-3) M methylprednisolone (MP) to the perfusate only slightly retarded the release of LDH, but significantly (P<0.05) inhibited cathepsin D release by 90% at 150 min. Liver flow did not change during the perfusion period when MP was added to control or hypoxic livers. Similarly, MP did not significantly alter oxygen consumption in perfused livers. However, MP protected against the reduction in carbon clearance during hypoxia without inducing blockade of colloidal carbon clearance. Moreover, opsonization of carbon with autologous plasma did not improve the clearance of colloidal carbon above that observed in nonopsonized experiments. Thus, pharmacologic doses of a synthetic glucocorticoid protected RES cells and release of lysosomal hydrolases during severe hypoxia in isolated perfused cat livers probably by stabilization of cellular and intracellular (lysosomal) membranes.
journal_name
Inflammationjournal_title
Inflammationauthors
Carlson RP,Lefer AMdoi
10.1007/BF00920336subject
Has Abstractpub_date
1976-12-01 00:00:00pages
347-57issue
4eissn
0360-3997issn
1573-2576journal_volume
1pub_type
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