Reticulocytosis and Bone Marrow cAMP Level in Rats Following Physical Exercises
In the course of intensive physical exercises the blood serum erythropoietin level becomes elevated 16,21. Erythropoietin, being a protein hormone of a big molecular weight, does not penetrate the target cell, but is bound by a surface receptor 15 and affects the processes occurring within the erythropoietin-sensitive cell according to the generally accepted theory of the “second messenger”. As it has been demonstrated2,5,7 erythropoietin triggers an increase of cAMP in the bone marrow cells. On the other hand, an elevation in the intracellular cAMP concentration has been shown to stimulate erythropoiesis in vitro.
KeywordsPhysical Exercise cAMP Level Reticulocyte Count Single Exercise Young Form
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