Abstract
Treatment with chimeric antigen receptor (CAR) T cells indicated remarkable clinical responses with liquid cancers such as hematological malignancies; however, their therapeutic efficacy faced with many challenges in solid tumors due to severe toxicities, antigen evasion, restricted and limited tumor tissue trafficking and infiltration, and, more importantly, immunosuppressive tumor microenvironment (TME) factors that impair the CAR T-cell function adds support survival of cancer stem cells (CSCs), responsible for tumor recurrence and resistance to current cancer therapies. Therefore, in-depth identification of TME and development of more potent CAR platform targeting CSCs may overcome the raised challenges, as presented in this review. We also discuss recent stemness-based innovations in CAR T-cell production and engineering to improve their efficacy in vivo, and finally, we propose solutions and strategies such as oncolytic virus-based therapy and combination therapy to revive the function of CAR T-cell therapy, especially in TME of solid tumors in future.
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Abbreviations
- ACT:
-
Adoptive cell therapy
- CAR:
-
Chimeric antigen receptor
- CRS:
-
Cytokine-release syndrome
- CSCs:
-
Cancer stem cells
- DAMPs:
-
Damage-associated molecular patterns
- ICB:
-
Immune checkpoint blockade
- iCARs:
-
Inhibitory CARs
- ICIs:
-
Immune checkpoint inhibitors
- iPSCs:
-
Induced pluripotent stem cells
- GvHD:
-
Graft-versus-host disease
- PAMPs:
-
Pathogen-associated molecular patterns
- PBMC:
-
Peripheral blood mononuclear cell
- MDSCs:
-
Myeloid-derived suppressor cells
- OV:
-
Oncolytic virus
- TAAs:
-
Tumor-associated antigens
- TAMs:
-
Tumor-associated macrophages
- TILs:
-
Tumor-infiltrating lymphocytes
- TME:
-
Tumor microenvironment
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S.A.N, I.R, F.H, H.O.A, A.H.A, A.A, N.H.S, A.T.A, and Y.F.M contributed to investigation and writing original/revised draft. R.L and S.K.Sh contributed to conceptualization, investigation, writing original draft, writing-review & editing, visualization, supervision, and project administration. All co-authors approved the final version of the manuscript.
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Noraldeen, S.A.M., Rasulova, I., Lalitha, R. et al. Involving stemness factors to improve CAR T-cell-based cancer immunotherapy. Med Oncol 40, 313 (2023). https://doi.org/10.1007/s12032-023-02191-7
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DOI: https://doi.org/10.1007/s12032-023-02191-7