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Two unique HLA-A*0201 restricted peptides derived from cyclin E as immunotherapeutic targets in leukemia.
Leukemia ( IF 12.8 ) Pub Date : 2020-01-06 , DOI: 10.1038/s41375-019-0698-z
Hong He 1 , Yukio Kondo 2 , Ken Ishiyama 3 , Gheath Alatrash 1 , Sijie Lu 1 , Kathryn Cox 1 , Na Qiao 1 , Karen Clise-Dwyer 1 , Lisa St John 1 , Pariya Sukhumalchandra 1 , Qing Ma 1 , Jeffrey J Molldrem 1
Affiliation  

Immunotherapy targeting leukemia-associated antigens has shown promising results. Because of the heterogeneity of leukemia, vaccines with a single peptide have elicited only a limited immune response. Targeting several peptides together elicited peptide-specific cytotoxic T lymphocytes (CTLs) in leukemia patients, and this was associated with clinical responses. Thus, the discovery of novel antigens is essential. In the current study, we investigated cyclin E as a novel target for immunotherapy. Cyclin E1 and cyclin E2 were found to be highly expressed in hematologic malignancies, according to reverse transcription polymerase chain reaction and western blot analysis. We identified two HLA-A*0201 binding nonameric peptides, CCNE1M from cyclin E1 and CCNE2L from cyclin E2, which both elicited the peptide-specific CTLs. The peptide-specific CTLs specifically kill leukemia cells. Furthermore, CCNE1M and CCNE2L CTLs were increased in leukemia patients who underwent allogeneic hematopoietic stem cell transplantation, and this was associated with desired clinical outcomes. Our findings suggest that cyclin E1 and cyclin E2 are potential targets for immunotherapy in leukemia.

中文翻译:

源自细胞周期蛋白 E 的两种独特的 HLA-A*0201 限制性肽作为白血病的免疫治疗靶点。

针对白血病相关抗原的免疫疗法已显示出有希望的结果。由于白血病的异质性,单一肽疫苗只能引起有限的免疫反应。将多种肽一起靶向可在白血病患者体内引发肽特异性细胞毒性 T 淋巴细胞 (CTL),这与临床反应相关。因此,新抗原的发现至关重要。在当前的研究中,我们研究了细胞周期蛋白 E 作为免疫治疗的新靶点。根据逆转录聚合酶链反应和蛋白质印迹分析,发现细胞周期蛋白 E1 和细胞周期蛋白 E2 在血液恶性肿瘤中高表达。我们鉴定了两种 HLA-A*0201 结合九聚肽,即来自细胞周期蛋白 E1 的 CCNE1M 和来自细胞周期蛋白 E2 的 CCNE2L,它们均能引发肽特异性 CTL。肽特异性 CTL 特异性杀死白血病细胞。此外,接受同种异体造血干细胞移植的白血病患者的 CCNE1M 和 CCNE2L CTL 增加,这与期望的临床结果相关。我们的研究结果表明细胞周期蛋白 E1 和细胞周期蛋白 E2 是白血病免疫治疗的潜在靶点。
更新日期:2020-01-06
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