Mobilization of human immature hematopoietic progenitors through combinatory use of bortezomib and immunomodulatory drugs

Taro Tochigi, Takatoshi Aoki, Yoshikane Kikushige, Tomohiko Kamimura, Yoshikiyo Ito, Takahiro Shima, Takuji Yamauchi, Yasuo Mori, Goichi Yoshimoto, Kenjiro Kamezaki, Koji Kato, Katsuto Takenaka, Hiromi Iwasaki, Koichi Akashi, Toshihiro Miyamoto

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)


Combination use of the proteasome inhibitor bortezomib and the immunomodulatory drugs lenalidomide or thalidomide has provided superior outcomes in multiple myeloma over their single use; however, these combinations can produce significant toxicities. Unexpectedly, we found a small but significant increase in the population of immature granulocytes and erythrocytes/megakaryocytes in peripheral blood in 16 of 22 patients (73%) treated with dexamethasone in combination with bortezomib and immunomodulatory drugs (triplet), but not in any of 25 patients treated with either bortezomib or immunomodulatory drugs with dexamethasone (doublet). These immature cells gradually increased to a peak level (mean 2.6% per white blood cells) with triplet therapy, and disappeared immediately after therapy cessation. The numbers of circulating CD34+ cells and colony-forming cells derived from peripheral blood mononuclear cells increased after triplet therapy compared with those in patients treated by either bortezomib or immunomodulatory drugs plus dexamethasone. Furthermore, triplet regimen downregulated the expression of CXCR4, a chemokine receptor essential for bone marrow retention, on CD34+ cells, suggesting an unexpected effect on normal hematopoietic stem/progenitor cells through the reduced interaction with the bone marrow microenvironment. Our observations suggest that combination use should be carefully evaluated to exert synergistic anti-myeloma effects while avoiding unexpected adverse events.

ジャーナルInternational journal of hematology
出版ステータス出版済み - 4月 1 2017

!!!All Science Journal Classification (ASJC) codes

  • 血液学


「Mobilization of human immature hematopoietic progenitors through combinatory use of bortezomib and immunomodulatory drugs」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。