CD99 is a therapeutic target on disease stem cells in myeloid malignancies.

CD99 is a therapeutic target on disease stem cells in myeloid malignancies.
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DOI:
10.1126/scitranslmed.aaj2025
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发表时间:
2017-01-25
影响因子:
17.1
通讯作者:
Park CY
Park CY
中科院分区:
医学1区
文献类型:
--
作者:
Chung SS;Eng WS;Hu W;Khalaj M;Garrett-Bakelman FE;Tavakkoli M;Levine RL;Carroll M;Klimek VM;Melnick AM;Park CY

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急性骨髓性白血病(AML)和骨髓增生异常综合征(MDS)是由自我更新的恶性干细胞引发和维持的;因此,需要根除AML和MDS干细胞才能治愈。我们鉴定了CD 99作为AML和MDS干细胞上频繁过表达的细胞表面蛋白。CD 99的表达允许在AML中从功能正常的造血干细胞(HSC)中前瞻性地分离白血病干细胞(LSC),并且AML母细胞上的高CD 99表达富集功能性LSC,如通过有限稀释异种移植研究所证明的。在不存在免疫效应细胞或补体的情况下,靶向CD 99的单克隆抗体(mAb)以SRC家族激酶依赖性方式诱导AML和MDS细胞死亡,并且抗CD 99 mAb的给药在AML异种移植物中表现出抗白血病活性。这些数据确立了CD 99作为AML和MDS干细胞的新标志物,以及这些疾病中有希望的治疗靶点。
Acute myeloid leukemia (AML) and the myelodysplastic syndromes (MDS) are initiated and sustained by self-renewing malignant stem cells; thus, eradication of AML and MDS stem cells is required for cure. We identified CD99 as a cell surface protein frequently overexpressed on AML and MDS stem cells. Expression of CD99 allows for prospective separation of leukemic stem cells (LSCs) from functionally normal hematopoietic stem cells (HSCs) in AML, and high CD99 expression on AML blasts enriches for functional LSCs as demonstrated by limiting dilution xenotransplant studies. Monoclonal antibodies (mAbs) targeting CD99 induce the death of AML and MDS cells in a SRC-family kinase dependent manner in the absence of immune effector cells or complement, and administration of anti-CD99 mAbs exhibit anti-leukemic activity in AML xenografts. These data establish CD99 as a novel marker of AML and MDS stem cells, as well as a promising therapeutic target in these disorders.
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