Abstract:
:The engineering of T lymphocytes to express chimeric antigen receptors (CARs) aims to establish T cell-mediated tumor immunity rapidly. In this study, we conducted a pilot clinical trial of autologous or donor- derived T cells genetically modified to express a CAR targeting the B-cell antigen CD19 harboring 4-1BB and the CD3ζ moiety. All enrolled patients had relapsed or chemotherapy-refractory B-cell lineage acute lymphocytic leukemia (B-ALL). Of the nine patients, six had definite extramedullary involvement, and the rate of overall survival at 18 weeks was 56%. One of the two patients who received conditioning chemotherapy achieved a three-month durable complete response with partial regression of extramedullary lesions. Four of seven patients who did not receive conditioning chemotherapy achieved dramatic regression or a mixed response in the haematopoietic system and extramedullary tissues for two to nine months. Grade 2-3 graft-versus-host disease (GVHD) was observed in two patients who received substantial donor-derived anti-CD19 CART (chimeric antigen receptor-modified T) cells 3-4 weeks after cell infusions. These results show for the first time that donor-derived anti-CD19 CART cells can cause GVHD and regression of extramedullary B-ALL. This study is registered at www.clinicaltrials.gov as NCT01864889.
journal_name
Oncoimmunologyjournal_title
Oncoimmunologyauthors
Dai H,Zhang W,Li X,Han Q,Guo Y,Zhang Y,Wang Y,Wang C,Shi F,Zhang Y,Chen M,Feng K,Wang Q,Zhu H,Fu X,Li S,Han Wdoi
10.1080/2162402X.2015.1027469subject
Has Abstractpub_date
2015-05-26 00:00:00pages
e1027469issue
11eissn
2162-4011issn
2162-402Xpii
1027469journal_volume
4pub_type
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