Stimulation of Na+-K+ pump in sheep red blood cells by heteroimmune anti-sheep red cell antibodies.
In the HK-LK polymorphism of sheep red blood cells, alloimmune antiserum against the L antigen on LK cells is known to stimulate the Na+-K+ pump in low K+ (LK) cells, but alloimmune antiserum against the M antigen of high K+ (HK) cells does not. We have shown for the first time that heteroimmune antibodies against sheep red blood cells raised in mice can stimulate the pump. Heteroimmune antibodies against both LK(L) cells and HK(M) cells stimulated active K+ transport in LK cells. Furthermore heteroimmune antibodies against LK(L) cells also stimulated the pump in HK cells. As expected, alloimmune and heteroimmune antibodies acted at different sites in stimulating transport in LK cells.
D000818:Animals; D000910:Antibodies, Heterophile / Q000276:immunology*; D000937:Antigen-Antibody Reactions; D001693:Biological Transport, Active; D004910:Erythrocyte Membrane / Q000378:metabolism; D004912:Erythrocytes / Q000276:immunology / Q000378:metabolism*; D007473:Ion Channels / Q000276:immunology / Q000378:metabolism*; D007518:Isoantibodies / Q000276:immunology; D051379:Mice; D011188:Potassium / Q000378:metabolism*; D012756:Sheep / Q000276:immunology*; D012964:Sodium / Q000378:metabolism*
D000910:Antibodies, Heterophile; D007473:Ion Channels; D007518:Isoantibodies; D012964:Sodium; D011188:Potassium