Dual Site-Specific Chemoenzymatic Antibody Fragment Conjugation Using CRISPR-Based Hybridoma Engineering.
Bioconjug Chem
; 32(2): 301-310, 2021 02 17.
Article
en En
| MEDLINE
| ID: mdl-33476135
ABSTRACT
Functionalized antibodies and antibody fragments have found applications in the fields of biomedical imaging, theranostics, and antibody-drug conjugates (ADC). In addition, therapeutic and theranostic approaches benefit from the possibility to deliver more than one type of cargo to target cells, further challenging stochastic labeling strategies. Thus, bioconjugation methods to reproducibly obtain defined homogeneous conjugates bearing multiple different cargo molecules, without compromising target affinity, are in demand. Here, we describe a straightforward CRISPR/Cas9-based strategy to rapidly engineer hybridoma cells to secrete Fab' fragments bearing two distinct site-specific labeling motifs, which can be separately modified by two different sortase A mutants. We show that sequential genetic editing of the heavy chain (HC) and light chain (LC) loci enables the generation of a stable cell line that secretes a dual tagged Fab' molecule (DTFab'), which can be easily isolated. To demonstrate feasibility, we functionalized the DTFab' with two distinct cargos in a site-specific manner. This technology platform will be valuable in the development of multimodal imaging agents, theranostics, and next-generation ADCs.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Fragmentos Fab de Inmunoglobulinas
/
Repeticiones Palindrómicas Cortas Agrupadas y Regularmente Espaciadas
/
Hibridomas
Idioma:
En
Revista:
Bioconjug Chem
Asunto de la revista:
BIOQUIMICA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Países Bajos