An antibody-drug conjugate with intracellular drug release properties showing specific cytotoxicity against CD7-positive cells.
Leuk Res
; 108: 106626, 2021 09.
Article
em En
| MEDLINE
| ID: mdl-34062328
ABSTRACT
Refractory T cell acute leukaemias that no longer respond to treatment would benefit from new modalities that target T cell-specific surface proteins. T cell associated surface proteins (the surfaceome) offer possible therapy targets to reduce tumour burden but also target the leukaemia-initiating cells from which tumours recur. Recent studies of the T cell leukaemia surfaceome confirmed that CD7 is highly expressed in overt disease. We have used an anti-CD7 antibody drug conjugate (ADC) to show that the binding of antibody to surface CD7 protein results in rapid internalization of the antigen together with the ADC. As a consequence, cell killing was observed via induction of apoptosis and was dependent on cell surface CD7. The in vitro cytotoxic activity (EC50) of the anti-CD7 ADC on T cell acute leukaemia (T-ALL) cells Jurkat and KOPT-K1 was found to be in the range of 5-8 ng/mL. In a pre-clinical xenograft model of human tumour growth expressing CD7 antigen, growth was curtailed by a single dose of ADC. The data indicate that CD7 targeting ADCs may be developed into an important second stage therapy for T cell acute leukaemia, for refractory CD7-positive leukaemias and for subsets of acute myeloid leukaemia (AML) expressing CD7.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Apoptose
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Imunoconjugados
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Antígenos CD7
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Liberação Controlada de Fármacos
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Neoplasias Pulmonares
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Anticorpos Monoclonais
Limite:
Animals
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Humans
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Male
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article