Discovery of novel non-peptide thrombopoietin mimetic compounds that induce megakaryocytopoiesis

Noriko Yamane, Koji Takahashi, Yoshikazu Tanaka, Kazue Kato, Masami Takayama, Naoki Ohyabu, Takeshi Shiota, Hideyuki Takenaka, Yutaka Yoshida, Shinichiro Hara, Takami Murashi, Etsuo Nakamura, Yoshinori Nishitani, Jun Ishizaki, Shoji Yamane, Kiyoshi Nagata, Koizumi Kenzo Koizumi, Yutsudo Takashi Yutsudo, Ryuji Suzuki, Tsunetoshi ItohHiroshi Takemoto

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We have identified a series of novel non-peptide compounds that activate the thrombopoietin-dependent cell line Ba/F3-huMPL. The compounds stimulated proliferation of Ba/F3-huMPL in the absence of other growth factors, but did not promote proliferation of the thrombopoietin-independent parent cell line Ba/F3. The thrombopoietin-mimetic compounds elicited signal-transduction responses comparable with recombinant human thrombopoietin, such as tyrosine phosphorylation of the thrombopoietin receptor, JAK (Janus kinase) 2, Tyk2 (tyrosine kinase 2), STAT (signal transducer and activator of transcription) 3, STAT5, MAPKs (mitogen-activated protein kinases), PLC? (phospholipase C?), Grb2 (growth-factor-receptor-bound protein 2), Shc (Src homology and collagen homology), Vav, Cbl and SHP- 2 (Src homology 2 domain-containing protein tyrosine phosphatase 2) and increased the number of CD41+ cells (megakaryocyte lineage) in cultures of human CD34+ bone-marrow cells (haematopoietic stem cells). These findings suggest that this series of compounds are novel agonists of the human thrombopoietin receptor and are possible lead compounds for the generation of anti-thrombocytopaenia drugs.

Original languageEnglish
Pages (from-to)275-285
Number of pages11
JournalBioscience Reports
Issue number5
Publication statusPublished - 2008 Oct


  • High-throughput screeningMegakaryocytopoiesisNon-peptide thrombopoietin receptor agonist
  • Signal transduction
  • Thrombocytopaenia
  • Thrombopoietin

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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