Retargeting NK-92 for anti-melanoma activity by a TCR-like single-domain antibody.
Immunol Cell Biol
; 91(10): 615-24, 2013.
Article
in En
| MEDLINE
| ID: mdl-24100387
ABSTRACT
The efficacy of immunotherapy based on natural killer (NK) cells is hampered by intrinsic non-specific cytotoxicity and insufficient activation of NK cells. Here, we confer the T-cell receptor-like (TCR-like) specificity on NK cells, taking advantage of both the innate and adaptive immune arms of the immune response to generate enhanced anti-melanoma activity. The TCR-like antibody (Ab) GPA7 was selected against melanoma-associated gp100/human leukocyte antigen (HLA)-A2 complex and then fused to intracellular domain of CD3-ζ chain. This fusion construct was incorporated into NK-92MI cell line and expressed as a chimeric antigen receptor on the surface of the cell. The anti-tumour activity of the transgenic NK-92MI-GPA7-ζ cell line was assessed against melanoma in vitro and in vivo. The engineered NK-92MI-GPA7-ζ cells could recognize melanoma cells in the context of HLA-A2 and showed enhanced killing of both melanoma cell lines and primary melanoma. Furthermore, adoptively transferred NK-92MI-GPA7-ζ cells significantly suppressed the growth of human melanoma in a xenograft model in mice. Collectively, these results demonstrate that the TCR-like Ab, GPA7, could redirect NK cells to target the intracellular antigen gp100 and enhance anti-melanoma activity, providing a promising immunotherapeutic strategy to prevent and treat melanoma.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Receptors, Antigen, T-Cell
/
Single-Domain Antibodies
/
Melanoma
Limits:
Animals
/
Humans
Language:
En
Journal:
Immunol Cell Biol
Year:
2013
Document type:
Article