Quantitative analysis of thrombopoietin receptors on human megakaryocytes

FEBS Letters

Hagiwara, Tetsuya¹  Kodama, Ikuko¹  Yuki, Chizuru¹  Kuwaki, Tomoaki¹  Kato, Takashi¹  Miyazaki, Hiroshi¹ 

[1] Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd., 3 Miyahara-cho, Takasaki, Gunma 370-1295, Japan

关键词: Thrombopoietin;    c-Mpl;    Megakaryocyte;    Scatchard analysis;    Cross-linking;    TPO;    thrombopoietin;    rhTPO;    recombinant human TPO;    rmIL-3;    recombinant murine interleukin-3;    IMDM;    Iscove's modified Dulbecco's medium;    FBS;    fetal bovine serum;    PRP;    platelet-rich plasma;    CB;    cord blood;    PBS;    phosphate-buffered saline;    PB;    peripheral blood;    BSA;    bovine serum albumin;    HBSS;    Hanks' balanced salt solution;    TPA;    12-O-tetradecanoyl phorbol 13-acetate;    EPO;    erythropoietin;   

DOI  :  10.1016/S0014-5793(98)00391-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Thrombopoietin (TPO), or c-MPL ligand, is the primary regulator of megakaryocyte and platelet production. TPO receptors expressed on human megakaryocytes derived from peripheral blood (PB) and cord blood (CB) progenitors cultured in the presence of TPO have now been analyzed quantitatively. Like those on human PB platelets, TPO receptors on the cultured megakaryocytes exhibited a molecular mass of approximately 80 kDa. Various characteristics of PB- and CB-derived megakaryocytes indicated that the former were more mature than the latter. Both PB- and CB-derived megakaryocytes expressed a single class of high-affinity TPO receptors, with 1933±772 (n=3) and 184±48 (n=4) sites per cell, respectively. These data indicate that the number of TPO receptors on human megakaryocytes increases with cell maturation.

【 授权许可】

Unknown