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Preclinical efficacy of daratumumab in T-cell acute lymphoblastic leukemia (T-ALL)
Blood ( IF 20.3 ) Pub Date : 2018-03-01 , DOI: 10.1182/blood-2017-07-794214
Karen L. Bride 1 , Tiffaney L. Vincent 1 , Soo-Yeon Im 1 , Richard Aplenc 1 , David M. Barrett 1 , William L. Carroll 2 , Robin Carson 3 , Yunfeng Dai 4 , Meenakshi Devidas 4 , Kimberly P. Dunsmore 5 , Tori Fuller 1 , Tina Glisovic-Aplenc 1 , Terzah M. Horton 6 , Stephen P. Hunger 1 , Mignon L. Loh 7 , Shannon L. Maude 1 , Elizabeth A. Raetz 8 , Stuart S. Winter 9 , Stephan A. Grupp 1 , Michelle L. Hermiston 7 , Brent L. Wood 10 , David T. Teachey 1
Affiliation  

As a consequence of acquired or intrinsic disease resistance, the prognosis for patients with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL) is dismal. Novel, less toxic drugs are clearly needed. One of the most promising emerging therapeutic strategies for cancer treatment is targeted immunotherapy. Immune therapies have improved outcomes for patients with other hematologic malignancies including B-cell ALL; however no immune therapy has been successfully developed for T-ALL. We hypothesize targeting CD38 will be effective against T-ALL. We demonstrate that blasts from patients with T-ALL have robust surface CD38 surface expression and that this expression remains stable after exposure to multiagent chemotherapy. CD38 is expressed at very low levels on normal lymphoid and myeloid cells and on a few tissues of nonhematopoietic origin, suggesting that CD38 may be an ideal target. Daratumumab is a human immunoglobulin G1κ monoclonal antibody that binds CD38, and has been demonstrated to be safe and effective in patients with refractory multiple myeloma. We tested daratumumab in a large panel of T-ALL patient-derived xenografts (PDX) and found striking efficacy in 14 of 15 different PDX. These data suggest that daratumumab is a promising novel therapy for pediatric T-ALL patients.

中文翻译:

达雷妥尤单抗在 T 细胞急性淋巴细胞白血病 (T-ALL) 中的临床前疗效

由于获得性或内在疾病抵抗力,复发或难治性 T 细胞急性淋巴细胞白血病 (T-ALL) 患者的预后很差。显然需要新的、毒性较小的药物。癌症治疗中最有前途的新兴治疗策略之一是靶向免疫疗法。免疫疗法改善了其他血液系统恶性肿瘤患者的预后,包括 B 细胞 ALL;然而,尚未成功开发出针对 T-ALL 的免疫疗法。我们假设靶向 CD38 对 T-ALL 有效。我们证明来自 T-ALL 患者的原始细胞具有强大的表面 CD38 表面表达,并且这种表达在暴露于多药化疗后保持稳定。CD38 在正常淋巴和骨髓细胞以及少数非造血来源的组织中以非常低的水平表达,表明 CD38 可能是理想的靶标。Daratumumab 是一种结合 CD38 的人免疫球蛋白 G1κ 单克隆抗体,已被证明对难治性多发性骨髓瘤患者安全有效。我们在一大组 T-ALL 患者来源的异种移植物 (PDX) 中测试了达雷妥尤单抗,并在 15 种不同的 PDX 中的 14 种中发现了惊人的疗效。这些数据表明,达雷妥尤单抗是一种有前途的治疗小儿 T-ALL 患者的新疗法。我们在一大组 T-ALL 患者来源的异种移植物 (PDX) 中测试了达雷妥尤单抗,并在 15 种不同的 PDX 中的 14 种中发现了惊人的疗效。这些数据表明,达雷妥尤单抗是一种有前途的治疗小儿 T-ALL 患者的新疗法。我们在一大组 T-ALL 患者来源的异种移植物 (PDX) 中测试了达雷妥尤单抗,并在 15 种不同的 PDX 中的 14 种中发现了惊人的疗效。这些数据表明,达雷妥尤单抗是一种有前途的治疗小儿 T-ALL 患者的新疗法。
更新日期:2018-03-01
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