Abstract
Chimeric antigen receptor (CAR) T cell therapy, a type of adoptive cell therapy, has been successfully used when treating lymphoma malignancies, but not nearly as successful in treating solid tumors. Trophoblast cell surface antigen 2 (Trop2) is expressed in various solid tumors and plays a role in tumor growth, invasion, and metastasis. In this study, a CAR targeting Trop2 (T2-CAR) was developed with different co-stimulatory intercellular domains. T2-CAR T cells demonstrated a powerful killing ability in the presence of Trop2-positive cells following an in vitro assay. Moreover, T2-CAR T cells produced multiple effector cytokines under antigen stimulation. In tumor-bearing mouse models, the CD27-based T2-CAR T cells showed a higher antitumor activity. Additionally, more CD27-based T2-CAR T cells survived in tumor-bearing mice spleens as well as in the tumor tissue. CD27-based T2-CAR T cells were also found to upregulate IL-7Rα expression, while downregulating PD-1 expression. In conclusion, the CD27 intercellular domain can enhance the T2-CAR T cell killing effect via multiple mechanisms, thus indicating that a CD27-based T2-CAR T cell approach is suitable for clinical applications.






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08 May 2024
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Abbreviations
- ACT:
-
Adoptive cell transfer
- Trop2:
-
Trophoblast cell surface antigen 2
- CAR:
-
Chimeric antigen receptor
- T2-CAR:
-
Trop2-specific CAR
- TAA:
-
Tumor-associated antigen
- FDA:
-
Food and Drug Administration
- scFv:
-
Single-chain fragment variant
- MHC:
-
Major histocompatibility complex
- IL-2:
-
Interleukin-2
- IL-7:
-
Interleukin-7
- IL-15:
-
Interleukin-15
- TNF-α:
-
Tumor necrosis factor-α
- UTD:
-
Untransduced
- IFN-γ:
-
Interferon-γ
- PBMCs:
-
Peripheral blood mononuclear cells
- IVIS:
-
In Vivo Imaging System
- LDH:
-
Lactate dehydrogenase
- TNBC:
-
Triple-negative breast cancer
- TIL:
-
Tumor infiltrated lymphocyte
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We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.
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This research was supported by the Science and Technology Department of Guangdong Province (2017A050501010 and 2016A050503023) and Guangzhou Science, Technology and Innovation Commission (201807010042).
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H.Z and C.H designed the study. C.H, Y.M, W.F, Z.Q, Y.B, and H.Z performed experiments, collected and analyzed data. L.Z provided technical support on the mouse model. C.H and H.Z drafted the manuscript. All authors revised and approved the manuscript.
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The research was approved by the Zhongshan School of Medicine, Sun Yat-sen University (Guangzhou, China). This research was performed in accordance with the Declaration of Helsinki and according to national and international guidelines. Whole blood from anonymous healthy volunteer donors was obtained from Guangzhou Blood Center, Guangzhou, in which all volunteers had known and confirmed that the blood was going to be used for scientific research. All mouse experiments were approved by and followed to the ethical regulations of IACUC, SYSU.
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Chen, H., Wei, F., Yin, M. et al. CD27 enhances the killing effect of CAR T cells targeting trophoblast cell surface antigen 2 in the treatment of solid tumors. Cancer Immunol Immunother 70, 2059–2071 (2021). https://doi.org/10.1007/s00262-020-02838-8
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DOI: https://doi.org/10.1007/s00262-020-02838-8