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Clinical Trial Summary

To evaluate the safety and efficacy of anti Tim3/CD123 CAR-T cells in the treatment of relapsed and refractory acute myeloid leukemia.


Clinical Trial Description

Cluster of Differentiation 123 (CD123) is usually overexpressed on leukemia stem cells (LSCs) in acute myeloid leukemia (AML). However, CD123 has poor specificity and is also expressed on normal hematopoietic stem cells (HSC), myeloid cells, and some non-hematopoietic cells. This leads to widespread on-target off-tumor effect in the clinical application of anti CD123 CAR-T cells, manifested as severe bone marrow suppression, organ damage, and patients experiencing infections, bleeding, and organ dysfunction. T cell immunoglobulin and mucin domain 3 (Tim-3) belongs to the Tim gene family. 85% of LSCs highly express Tim-3, while normal hematopoietic stem/progenitor cells (HSC/P), granulocytes, and macrophages do not express Tim-3. Compared with CD123, seeing Tim-3 as a recognition tool for LSCs has higher specificity. In vivo and in vitro studies have confirmed that anti Tim-3 CAR-T cells have significant anti LSCs effects, while not affecting the ability of normal HSC/P to form colonies and differentiate lineages. We believe that using both Tim-3 and CD123 as targets for CAR-T cells can improve the specificity of recognizing LSCs, reduce the killing effect of CAR-T cells on HSC/P expressing CD123, and thus reduce the on-target off-tumor effect. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06125652
Study type Interventional
Source Xuzhou Medical University
Contact Kailin Xu, MD.,PD.
Phone 15162166166
Email lihmd@163.com
Status Recruiting
Phase Phase 1/Phase 2
Start date November 4, 2023
Completion date January 1, 2027

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