Effects of pegylated recombinant human megakaryocyte growth and development factor on thrombocytopenia induced by a new myelosuppressive chemotherapy regimen in mice

Hiromichi Akahori*, Kazunori Shibuya, Masako Ozai, Masumi Ida, Koji Kabaya, Takashi Kato, Hiroshi Miyazaki

*この研究の対応する著者

研究成果: Article査読

30 被引用数 (Scopus)

抄録

Thrombopoietin, the endogenous c-Mpl ligand, is a novel lineage-specific hematopoietic factor that plays a pivotal rule in the regulation of megakaryocytopoiesis and thrombopoiesis. In this study, we examined the effects of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF), a truncated molecule of recombinant human c-Mpl ligand derivatized with polyethylene glycol, on myelosuppressive chemotherapy- induced thrombocytopenia in mice. We developed a new murine model of thrombocytopenia induced by i.v. injections of mitomycin C (MMC) for two consecutive days. In control mice, platelet counts began to decrease on day 6, reached a nadir of less than 5% of basal level on day 14, and could not recover to basal level by day 26. Administration of PEG-rHuMGDF greatly enhanced recovery of the number of megakaryocyte progenitor cells and the megakaryocytes in bone marrow, and markedly reduced the severity of thrombocytopenia: it also accelerated platelet recovery in a dose-dependent manner in myelosuppressed mice. Mice receiving consecutive administration of higher doses of PEG-rHuMGDF showed no thrombocytopenia but rather had platelet counts being increased over basal level. Although absolute neutrophil counts and red cell counts also were decreased following MMC treatment, administration of PEG-rHuMGDF also improved neutropenia and anemia. Administration of PEG-rHuMGDF on alternate days or once a week after chemotherapy was almost as effective as consecutive administration in improving thrombocytopenia. Combined administration of PEG-rHuMGDF and rHuG- CSF had an additive effect on improvement of thrombocytopenia and neutropenia. These results suggest that PEG-rHuMGDF is a therapeutically effective agent in the treatment of thrombocytopenia associated with chemotherapy.

本文言語English
ページ(範囲)678-689
ページ数12
ジャーナルSTEM CELLS
14
6
DOI
出版ステータスPublished - 1996 11月
外部発表はい

ASJC Scopus subject areas

  • 分子医療
  • 発生生物学
  • 細胞生物学

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