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  • Title: Serum thrombopoietin levels in patients undergoing autologous peripheral blood stem cell transplantation.
    Author: Shimazaki C, Inaba T, Uchiyama H, Sumikuma T, Kikuta T, Hirai H, Sudo Y, Yamagata N, Ashihara E, Goto H, Murakami S, Haruyama H, Fujita N, Nakagawa M.
    Journal: Bone Marrow Transplant; 1997 Apr; 19(8):771-5. PubMed ID: 9134167.
    Abstract:
    Recently, the ligand for c-mpl has been cloned and initial studies have shown it to be the platelet regulatory factor, thrombopoietin (TPO). To elucidate the role of TPO in the reconstitution of megakaryopoiesis and platelet production after stem cell transplantation, we measured serum TPO levels in nine patients undergoing autologous peripheral blood stem cell transplantation (PBSCT) and in healthy volunteers. Serum TPO levels significantly correlated with the degree of peripheral thrombocytopenia and a strong inverse correlation between serum TPO level and platelet count was observed (r = -0.700, P < 0.001). Serum TPO levels began to rise as the platelet count decreased after chemotherapy, TPO levels peaked at over 25.00 fmoles/ml between days 0 and 10; TPO levels then decreased gradually as the platelet count began to rise. One patient with multiple myeloma received purified CD34+ peripheral blood stem cells. No difference was observed in the kinetics of serum TPO levels between unfractionated and purified PBSCT. These observations suggest that TPO plays a critical role in the reconstitution of megakaryopoiesis and platelet production after PBSCT.
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