Article
作者: Shen, Lianjun ; Li, Wenling ; Li, Yu ; Chen, Lvzhe ; Li, Zhimin ; Wang, Xinxin ; Cao, Wei ; Chen, Yingnian ; Zhang, Xi ; Zang, Qingying ; Huang, Wenhui ; Luo, Le ; Liu, Jia ; Yuan, Zhongtao ; He, Jiaping ; Gao, Li ; Li, Chunmin ; Yin, Ping ; Zhang, Lihua ; Rao, Jun ; Dong, Yancheng ; Li, Xiaoping ; Liu, Lin ; Wang, Sanbin ; Li, Shiqi ; Li, Gui ; Li, Sheng ; Wang, Youcheng ; Zhang, Dingsong
T-cell acute lymphoblastic leukemia (T-ALL) represents an area of highly unmet medical needs. Once relapsed, patients have limited treatment options and poor prognosis. T-ALL antigens such as CD7 is extensively expressed in normal T cells and natural killer (NK) cells, and extending the success of CAR-T therapy to T cell malignancies was challenged by CAR-T cell fratricide, high production cost, and potential product contaminations. GC027 is an "off-the-shelf" allogeneic CD7 targeted CAR-T therapeutic product for T cell malignancies. It demonstrated superior cell expansion and antileukemia efficacy in mouse xenograft model. In our previous study, we observed promising efficacy results in the first two relapsed and refractory(R/R) T-ALL patients treated with GC027. In the expanded study, 11 out of 12 patients had rapid eradication of T-lymphoblasts and reached complete response within 1-month after GC027 infusion. GC027 cells expanded quickly beginning at infusion and reached to peak around 5-10 days after infusion. For most patients with a response(9/11), GC027 could not be detected via flow cytometry or qPCR 4 weeks after infusion. One patient had progression free survival of >3 years. With manageable toxicity profile, GC027 demonstrated superior clinical efficacy to standard chemotherapy regimens in (R/R) T cell malignancies.