Damiani Daniela, Tiribelli Mario
Division of Hematology and Stem Cell Transplantation, University Hospital, 33100 Udine, Italy.
Department of Medicine (DMED), University of Udine, 33100 Udine, Italy.
Biomedicines. 2024 May 28;12(6):1194. doi: 10.3390/biomedicines12061194.
Despite recent advances, the prognosis of acute myeloid leukemia (AML) remains unsatisfactory due to disease recurrence and the development of resistance to both conventional and novel therapies. Engineered T cells expressing chimeric antigen receptors (CARs) on their cellular surface represent one of the most promising anticancer agents. CAR-T cells are increasingly used in patients with B cell malignancies, with remarkable clinical results despite some immune-related toxicities. However, at present, the role of CAR-T cells in myeloid neoplasms, including AML, is extremely limited, as specific molecular targets for immune cells are generally lacking on AML blasts. Besides the paucity of dispensable targets, as myeloid antigens are often co-expressed on normal hematopoietic stem and progenitor cells with potentially intolerable myeloablation, the AML microenvironment is hostile to T cell proliferation due to inhibitory soluble factors. In addition, the rapidly progressive nature of the disease further complicates the use of CAR-T in AML. This review discusses the current state of CAR-T cell therapy in AML, including the still scanty clinical evidence and the potential approaches to overcome its limitations, including genetic modifications and combinatorial strategies, to make CAR-T cell therapy an effective option for AML patients.
尽管近年来取得了进展,但由于疾病复发以及对传统疗法和新疗法产生耐药性,急性髓系白血病(AML)的预后仍然不尽人意。在细胞表面表达嵌合抗原受体(CAR)的工程化T细胞是最有前景的抗癌药物之一。CAR-T细胞越来越多地用于治疗B细胞恶性肿瘤患者,尽管存在一些免疫相关毒性,但临床效果显著。然而,目前CAR-T细胞在包括AML在内的髓系肿瘤中的作用极为有限,因为AML原始细胞上通常缺乏免疫细胞的特异性分子靶点。除了可利用的靶点稀少外,由于髓系抗原常常在正常造血干细胞和祖细胞上共同表达,可能导致无法耐受的骨髓消融,并且由于抑制性可溶性因子的存在,AML微环境不利于T细胞增殖。此外,该疾病快速进展的特性进一步使CAR-T在AML中的应用复杂化。本综述讨论了CAR-T细胞疗法在AML中的现状,包括仍然稀少的临床证据以及克服其局限性的潜在方法,包括基因修饰和联合策略,以使CAR-T细胞疗法成为AML患者的有效选择。
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