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Cancer Immunology Research
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Clinical Trials of Cancer Immunotherapies

Abstract A014: Phase I clinical trial with PD-1/MUC1 CAR-pNK92 immunotherapy

Qiao Li, Yi Wang, Ming Lin, Leiming Xia, Yangyi Bao, Xiang Sun and Lin Yang
Qiao Li
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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Yi Wang
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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Ming Lin
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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Leiming Xia
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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Yangyi Bao
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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Xiang Sun
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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Lin Yang
University of Michigan, Ann Arbor, MI; The First People’s Hospital of Hefei, Hefei, China; University of Michigan Rogel Cancer Center, Ann Arbor, MI; PersonGen Biomedicine Co. Ltd, Suzhou, China.
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DOI: 10.1158/2326-6074.CRICIMTEATIAACR18-A014 Published February 2019
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Abstracts: Fourth CRI-CIMT-EATI-AACR International Cancer Immunotherapy Conference: Translating Science into Survival; September 30 - October 3, 2018; New York, NY

Abstract

Mucin1 (MUC1) proteins represent a family of high molecular weight trans-membrane glycoproteins that protect epithelial cells and mediate signal transduction by communication with extracellular stimuli. On the other hand, MUC1 has been observed to be overexpressed and glycosylated in adenocarcinoma, making it an ideal molecular target for cancer treatment. MUC1 based antibody and specific chimeric antigen receptors (CARs) modified T/NK cells exhibit strong antibody-dependent or direct-cell cytotoxicity to MUC1 positive tumor cells. However, treatment failure with MUC1-targeted therapy was usually caused by tumor microenvironment (TME)-driven immune suppression. PD-L1 has been identified as a negative checkpoint molecule that promotes immune evasion of tumor cells. The interaction of PD-1 and PD-L1 inhibits the function of tumor-infiltrating lymphocytes (TILs) or infused T/NK cells while activating the negative immune-regulatory cells in TME, such as regulatory T-cells and MDSCs. To overcome these barriers, we engineered clinically applicable NK-92 cells by lentiviral gene transfer to express chimeric antigen receptors comprising an anti-MUC1 scFv antibody fusion protein with CD28-CD137 as a signaling moiety and truncated PD-1 peptide. NK92 cells expressing anti-MUC1 CAR specifically and efficiently lysed MUC1 positive tumor cells in vitro and in vivo. The safety of NK-92 cell administration has been demonstrated by numerous phase I clinical trials. In our study, 13 patients with different kinds of tumors (lung cancer, pancreatic cancer, colon cancer and ovarian cancer) with positive PD-L1 and MUC-1 expression were enrolled. CAR-NK cells were infused (1×109 cells/time) into these patients. Of 13 patients, 3 patients were withdrawn, 9 patients (69.2%) showed stable disease and 1 patient showed progressive disease. The cytokine level and hematologic changes were monitored to evaluate the safety. Severe cytokine storm and/or bone marrow suppression were not observed. From this phase I clinical trial we found that CAR-NK therapy has a broad prospect of application as a new cellular immunotherapy due to its stable clinical efficacy, mild side effects and ease of preparation.

Citation Format: Qiao Li, Yi Wang, Ming Lin, Leiming Xia, Yangyi Bao, Xiang Sun, Lin Yang. Phase I clinical trial with PD-1/MUC1 CAR-pNK92 immunotherapy [abstract]. In: Proceedings of the Fourth CRI-CIMT-EATI-AACR International Cancer Immunotherapy Conference: Translating Science into Survival; Sept 30-Oct 3, 2018; New York, NY. Philadelphia (PA): AACR; Cancer Immunol Res 2019;7(2 Suppl):Abstract nr A014.

  • ©2019 American Association for Cancer Research.
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Cancer Immunology Research: 7 (2 Supplement)
February 2019
Volume 7, Issue 2 Supplement
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Abstract A014: Phase I clinical trial with PD-1/MUC1 CAR-pNK92 immunotherapy
Qiao Li, Yi Wang, Ming Lin, Leiming Xia, Yangyi Bao, Xiang Sun and Lin Yang
Cancer Immunol Res February 1 2019 (7) (2 Supplement) A014; DOI: 10.1158/2326-6074.CRICIMTEATIAACR18-A014

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Abstract A014: Phase I clinical trial with PD-1/MUC1 CAR-pNK92 immunotherapy
Qiao Li, Yi Wang, Ming Lin, Leiming Xia, Yangyi Bao, Xiang Sun and Lin Yang
Cancer Immunol Res February 1 2019 (7) (2 Supplement) A014; DOI: 10.1158/2326-6074.CRICIMTEATIAACR18-A014
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