期刊
FRONTIERS IN IMMUNOLOGY
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2022.825635
关键词
chemokine receptor CCR9; antitumoral activity; combined chemotherapy and immunotherapy; orthotopic xenograft mouse model; therapeutic antibodies; T-ALL leukemia; CCR9 positive T-ALL leukemia
类别
资金
- ISCIII [PID2019-105404RB-I00]
- EU, Operative program on Intelligent Growth 2014-2020
- Spanish Ministry of Economy, Industry and Competitiveness [PIE-201420E109]
- FEDER funds from the EU
- Spanish Ministry of Science and Innovation - MCIN/AEI [PIE-201720E092]
- CSIC
- [PI14/00703]
- [RTC-2015-3786-1]
Relapsed or refractory T-acute lymphoblastic leukemia (T-ALL) has a poor prognosis. An anti-CCR9 monoclonal antibody (mAb 92R) has been found to inhibit tumor growth and increase survival in T-ALL, and in combination with chemotherapy, it shows even better therapeutic effects. Furthermore, a humanized version of the antibody (Srb1) also has the potential to inhibit tumor growth.
Relapsed or refractory T acute lymphoblastic leukemia (T-ALL) still carries poor prognosis. Aiming to improve outcomes, the therapeutic potential of an anti-CCR9 monoclonal antibody (mAb 92R), targeting the human chemokine-receptor CCR9 is analyzed on orthotopic xenotransplants. 92R mAb treatment of mice carrying human CCR9(+) T-ALL cell lines or primary T cell leukemias inhibits tumor growth and increases survival. The therapeutic effects of 92R are specific and synergize with chemotherapeutic agents increasing survival. Furthermore, 92R decreases size of non-hematopoietic tumors with a forced CCR9 expression and of solid tumors generated by the pancreatic adenocarcinoma cell line AsPC-1. In addition, a humanized version of 92R mAb (Srb1) is also able to inhibit growth of CCR9(+) T-ALL tumor cells in vivo, increasing survival 2.66-fold. Finally, 92R mAb prevents liver accumulation of infiltrates and reduces tumor cell numbers in already formed infiltrates. Thus, the humanized version of 92R mAb (Srb1), displays therapeutic potential for CCR9(+) tumor treatment and might represent one of the first therapeutic antibodies for precision medicine on T-ALL patients.
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