The effect of sheep anti‐L and certain cattle S‐system reagents on active potassium transport in sheep and cattle red blood cells

Abstract

Certain anti-sheep L antisera stimulated active potassium transport in cattle red cells. All cattle red cells tested (red cells from 21 Jersey cows) which had an internal K level of less than 70 mrnol/l were stimulated but those with more than 75 mmol/l of K (red ceIls from 7 Jersey cows) were not stimulated. CattIe S-system reagents and isoimmune cattle sera produced by injecting red cells of low-potassium type into cows with cells of high-potassium type failed to stimulate active potassium transport in either cattle or sheep red cells.

Use of canine red blood cell with high concentrations of potassium, reduced glutathione, and free amino acid as host cells for in vitro cultivation of Babesia gibsoni

“…In contrast, canine and feline RBC are permeable to glutamate through a sodium-dependent transport system for glutamate and aspartate. 12 Interestingly, glutamate and aspartate transport were greatly accelerated in the canine HK cells by the function of Na-K-ATPase, which is not detected in LK cells, resulting in high accumulation of glutamate and aspartate in HK cells. 13 It thus appeared that B gibsoni may also use glutamate for its growth in RBC.…”