title: Polycythaemia is erythropoietin-independent after renal transplantation.
abstract: Serum erythropoietin increased in 55 patients after transplantation. The serum erythropoietin decreased when the haematocrit and haemoglobin reached high levels, indicating recovery of a feed-back control system. Despite the diminution of erythropoietin, six patients demonstrated a state of erythrocytosis while the in vitro cultures of BFU-e revealed high sensitivity to the reduced doses of erythropoietin, using monocyte-free T-lymphocyte-depleted peripheral blood. In polycythaemic transplanted patients it is possible that cellular interactions stimulate an early hyperproliferation of BFR-e with a greater erythropoietin sensitivity and a partial capacity to grow in the absence of erythropoietin.
mesh_terms: D004920:Erythropoiesis / Q000187:drug effects; D004921:Erythropoietin / Q000494:pharmacology / Q000502:physiology; D006801:Humans; D066298:In Vitro Techniques; D016030:Kidney Transplantation; D011086:Polycythemia / Q000097:blood / Q000209:etiology*
chemical_list: D004921:Erythropoietin