Host versus graft reaction is a major impediment to CAR-T cell immune therapy in allogeneic settings. Authors show here that CAR-T cells, engineered to be deficient in MHC I expression but to express the NK inhibitor HLA-E, are resistant to destruction by both T and NK cells of the host.Universal CAR T-cell therapies are poised to revolutionize cancer treatment and to improve patient outcomes. However, realizing these advantages in an allogeneic setting requires universal CAR T-cells that can kill target tumor cells, avoid depletion by the host immune system, and proliferate without attacking host tissues. Here, we describe the development of a novel immune-evasive universal CAR T-cells scaffold using precise TALEN-mediated gene editing and DNA matrices vectorized by recombinant adeno-associated virus 6. We simultaneously disrupt and repurpose the endogenous TRAC and B2M loci to generate TCR alpha beta- and HLA-ABC-deficient T-cells expressing the CAR construct and the NK-inhibitor named HLA-E. This highly efficient gene editing process enables the engineered T-cells to evade NK cell and alloresponsive T-cell attacks and extend their persistence and antitumor activity in the presence of cytotoxic levels of NK cell in vivo and in vitro, respectively. This scaffold could enable the broad use of universal CAR T-cells in allogeneic settings and holds great promise for clinical applications.

Endowing universal CAR T-cell with immune-evasive properties using TALEN-gene editing

Marcenaro, Emanuela;
2022-01-01

Abstract

Host versus graft reaction is a major impediment to CAR-T cell immune therapy in allogeneic settings. Authors show here that CAR-T cells, engineered to be deficient in MHC I expression but to express the NK inhibitor HLA-E, are resistant to destruction by both T and NK cells of the host.Universal CAR T-cell therapies are poised to revolutionize cancer treatment and to improve patient outcomes. However, realizing these advantages in an allogeneic setting requires universal CAR T-cells that can kill target tumor cells, avoid depletion by the host immune system, and proliferate without attacking host tissues. Here, we describe the development of a novel immune-evasive universal CAR T-cells scaffold using precise TALEN-mediated gene editing and DNA matrices vectorized by recombinant adeno-associated virus 6. We simultaneously disrupt and repurpose the endogenous TRAC and B2M loci to generate TCR alpha beta- and HLA-ABC-deficient T-cells expressing the CAR construct and the NK-inhibitor named HLA-E. This highly efficient gene editing process enables the engineered T-cells to evade NK cell and alloresponsive T-cell attacks and extend their persistence and antitumor activity in the presence of cytotoxic levels of NK cell in vivo and in vitro, respectively. This scaffold could enable the broad use of universal CAR T-cells in allogeneic settings and holds great promise for clinical applications.
File in questo prodotto:
File Dimensione Formato  
E. Marcenaro Nature Communications-41467_2022_Article_30896.pdf

accesso aperto

Descrizione: Articolo su Rivista
Tipologia: Documento in versione editoriale
Dimensione 3.47 MB
Formato Adobe PDF
3.47 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/1095158
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 29
  • ???jsp.display-item.citation.isi??? 26
social impact