title: The effects of splenectomy and glucocorticoids on survival and hepatic uptake of damaged red cells in the mouse.
abstract: We have studied the effects of splenectomy and glucocorticoids on the survival and sequestration of Heinz body-containing red blood cells (RBC-HZB). Mice were injected with phenylhydrazine damaged 51Cr labeled isologous red blood cells (RBCs). The spleen removed 36% and the liver 19% of the injected dose after 120 hrs. Red cell survival (T 1/2) fell from 180 hrs for undamaged red cells to 16 hrs for RBC-HZB. Splenectomy resulted in an increase in hepatic uptake of damaged RBCs (36% of the injected dose) and a modest improvement in red cell survival (T 1/2 54 hrs). Treatment of non-splenectomized mice with glucocorticoids reduced the splenic uptake to 16% and the hepatic uptake to 14% of the injected dose. The reduction of splenic upatke was associated with a decrease in splenic mass rather than a decrease in uptake per unit weight of splenic tissue, while reduction in hepatic uptake was associated with both a decrease in hepatic mass and uptake per unit weight. A marked decrease was observed in hepatic uptake and in phagocytosis by Kupffer cells in glucocorticoid-treated splenectomized mice. These data suggest that increased hepatic uptake may decrease the effectiveness of splenectomy in RBC-HZB hemolytic anemia and that glucocorticoids may decrease the hepatic uptake by reducing phagocytosis by Kupffer cells.
mesh_terms: D000818:Animals; D003348:Cortisone / Q000494:pharmacology*; D004912:Erythrocytes / Q000502:physiology*; D006366:Heinz Bodies; D007728:Kupffer Cells / Q000276:immunology / Q000648:ultrastructure; D008099:Liver / Q000033:anatomy & histology / Q000502:physiology*; D008297:Male; D051379:Mice; D010587:Phagocytosis; D013154:Spleen / Q000033:anatomy & histology; D013156:Splenectomy
chemical_list: D003348:Cortisone