@techreport{oai:kanazawa-u.repo.nii.ac.jp:00044760, month = {May}, note = {余剰造血幹前駆細胞(HSPC)のマーカーであるCXCR4陽性のHSCPを活性化できれば、再生不良性貧血(再不貧)患者の造血機能を改善させられる可能性がある。免疫不全マウスの骨髄内にヒトCD34(+)細胞を移植したところ、3.3-20.4%のヒトCD45陽性細胞の再生を確認した。6pLOH陽性の再不貧患者単球由来iPS細胞からHSPCを誘導し、同じマウスに移植したところ、患者体内で優勢であった6pLOH(+)HSPCのCXCR4(+)細胞割合(平均10.2%)は野生型(50.7%)に比べて有意に低値であった。野生型CXCR4(+)HSPCをin vivoで活性化させる方法を現在検討中である。, A chemokine receptor CXCR4 is preferentially expressed by redundant hematopoietic stem/progenitor cells (HSPCs) that do not contribute to hematopoiesis. Stimulation of residual CXCR4(+) HSPCs may restore hematopoietic function of patients with acquired aplastic anemia (AA). First, we optimized method of engrafting an immune-deficient mouse (BRGS mouse) with cord-blood CD34(+) cells using intra-bone marrow injection, and confirmed the presence of human CD45(+) cells that accounted for 3.3-20.4% of the various tissue-derived cells. Next, we induced HSPCs from iPS cells that were generated from monocytes of AA patients possessing 6pLOH(+) leukocytes, which were predominant in the patients’ blood, as a result of uniparental disomy, and injected the HSPCs to the same mice. Regenerating human 6pLOH(+)CD34(+) cells in the mice expressed CXCR4 to a significantly lesser degree (mean 10.2%) than did 6pLOH(-)CD34(+) cells. We are currently exploring a method to activate CXCR4(+) HSPCs in vivo., 研究課題/領域番号:15K15360, 研究期間(年度):2015-04-01 - 2017-03-31, 出典:「骨髄不全におけるCXCR4陽性造血幹細胞を標的とした新規治療法の開発」研究成果報告書 課題番号15K15360 (KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-15K15360/15K15360seika/)を加工して作成, 金沢大学医薬保健研究域医学系}, title = {骨髄不全におけるCXCR4陽性造血幹細胞を標的とした新規治療法の開発}, year = {2017} }