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Abstract
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- Chimaeric antigen receptor (CAR) T-cells have shown impressive results in patients with B-cell leukaemia. Yet, in patients with lymphoma durable responses are still rare and heavy preconditioning required. Apoptosis resistance is considered a hallmark of cancer, often conveyed by a halted apoptosis signalling. Tumours regularly skew the balance of the components of the apoptotic machinery either through up-regulating antiapoptotic proteins or silencing pro-apoptotic ones. Malignant B-cells frequently up-regulate anti-apoptotic B-cell lymphoma 2 (Bcl-2) family proteins leading to therapy resistance. CAR T-cells kill tumour cells via apoptosis induction and their efficacy may be affected by the level of Bcl-2 family proteins. Hence, there is an interesting possibility to increase the effect of CAR T-cell therapy by combining it with apoptosis inhibitor blockade agents. Compounds that inhibit Bcl-2, B-cell lymphoma extra large (Bcl-xL) and Bcl-2-like protein 2 (Bcl-w), can restore execution of apoptosis in tumour cells or sensitize them to other apoptosis-dependent treatments. Hence, there is a great interest to combine such agents with CAR T-cell therapy to potentiate the effect of CAR T-cell killing. This review will focus on the potential of targeting the apoptotic machinery to sensitize tumour cells to CAR T-cell killing.
Subject headings
- NATURVETENSKAP -- Biologi -- Immunologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Immunology (hsv//eng)
Keyword
- ABT-737; B-cell lymphoma 2 (Bcl-2) family proteins; chimaeric antigen receptor (CAR) T-cells; inhibitor of apoptosis protein (IAP); Navitoclax
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