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Ryuzo Koyama
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Journal Articles

Transforming Growth Factor-β1 (TGF-β1) Induces Thrombopoietin From Bone Marrow Stromal Cells, Which Stimulates the Expression of TGF-β Receptor on Megakaryocytes and, in Turn, Renders Them Susceptible to Suppression by TGF-β Itself With High Specificity

Sumio Sakamaki, Yasuo Hirayama, Takuya Matsunaga, Hiroyuki Kuroda, Toshiro Kusakabe, Takehide Akiyama, Yuichi Konuma, Katsunori Sasaki, Naoki Tsuji, Tetsuro Okamoto, Masayoshi Kobune, Katsuhisa Kogawa, Junji Kato, Rishu Takimoto, Ryuzo Koyama, Yoshiro Niitsu
Journal: Blood
Blood (1999) 94 (6): 1961–1970.
https://doi.org/10.1182/blood.V94.6.1961
Published: 1999
Journal Articles

Concentrations of Thrombopoietin in Bone Marrow in Normal Subjects and in Patients With Idiopathic Thrombocytopenic Purpura, Aplastic Anemia, and Essential Thrombocythemia Correlate With Its mRNA Expression of Bone Marrow Stromal Cells

Yasuo Hirayama, Sumio Sakamaki, Takuya Matsunaga, Takashi Kuga, Hiroyuki Kuroda, Toshiro Kusakabe, Katsunori Sasaki, Koshi Fujikawa, Junji Kato, Katsuhisa Kogawa, Ryuzo Koyama, Yoshiro Niitsu
Journal: Blood
Blood (1998) 92 (1): 46–52.
https://doi.org/10.1182/blood.V92.1.46.413k44_46_52
Published: 1998