Effect of androgens on maturation and metabolism of erythroid tissue.

Specific changes taking place in the erythroid tissue following depletion or replacement of androgens were studied in rats. The reduction of testosterone levels in blood of orchiectomized animals did occur in conjunction with a decline of erythrocyte glucose-6-phosphate (G6P) and lactate levels. No evidence of anemia was observed. The subcutaneous administration of testosterone propionate (16.0 mg/kg) to orchiectomized rats restored, within 12 hours, blood testosterone levels as well as erythrocyte G6P levels and lactate production. The in vitro incorporation of glucose-1-14C into rat erythrocytes incubated with testosterone was comparable to that of control cells. A radioautographic study of rat erythroid marrow pulsed with glucose-1-14C showed a lower labeling when testosterone propionate was administered. The authors conclude that testosterone does directly affect glucose metabolism of erythroid cells, via the pentose shunt pathway. The possible role of the androgen-dependent enhancement of erythroid glycolysis is discussed in relation to the function of testosterone receptocytes present in marrow cells and a 17beta-hydroxysteroid dehydrogenase present in erythrocytes.