Abstract
Prognosis in patients with myelodysplastic syndromes (MDS) is closely correlated with cytopenia. To date, no factor is available which is able to reliably stimulate megakaryopoiesis in vivo. Recently, the ligand of the mpl receptor was cloned and found to be thrombopoietin (TPO). We measured endogenous TPO serum levels in 69 patients suffering from MDS using an TPO receptor-based ELISA. Twenty-six of the patients suffered from refractory anemia (RA), 12 from RA with excess of blasts (RAEB), 25 from RAEB in transition (RAEBt), and six from chronic myelomonocytic leukemia (CMML). This assay uses a chimeric molecule consisting of the human TPO receptor fused to the Fc portion of human IgG as the capture reagent. Biotinylated antibody to TPO IgG was used for detection and the lower detection limit in serum was found to be 160 pg/ml. Samples obtained from healthy individuals with a normal platelet number were shown to be below detectable levels. In patients with RA, high endogenous serum TPO concentrations correlated with low platelet count and significantly elevated TPO concentrations were only found when megakaryopoiesis was absent or decreased in the bone marrow. This correlation was not detected in RAEB and RAEBt patients and no...Continue Reading
Citations
Jan 29, 2000·Cancer·K KabanM Albitar
Jun 19, 2004·Leukemia Research·Joan van den BoschP W Wijermans
Oct 12, 2000·Experimental Hematology·U KalinaO G Ottmann
Mar 25, 1999·Experimental Hematology·W K HofmannO G Ottmann
Sep 23, 2006·Leukemia·E J HouwerzijlJ T M de Wolf
Dec 19, 1998·British Journal of Haematology·H TamuraT Nomura
Nov 11, 1999·British Journal of Haematology·E Hellström-LindbergA Ost
May 31, 2001·European Journal of Haematology·M IzumiR Ohno
Oct 31, 2002·European Journal of Haematology·M A SarmientoR M Bengió
May 10, 2002·Leukemia & Lymphoma·Xiao-Yan LinTerukatsu Arima
Jun 14, 2008·Expert Opinion on Biological Therapy·Ramon V Tiu, Mikkael A Sekeres
Jan 31, 2004·Pediatric Blood & Cancer·Csongor KissPéter Kovács
Oct 27, 2015·Leukemia·W LiA Verma
Mar 6, 2009·The Korean journal of laboratory medicine·Jae Jin LeeWoo-In Lee
Dec 14, 2012·PloS One·Lin-lin ShaoMing Hou
Oct 6, 2000·Leukemia·W WangM Tomonaga