[An anti-P-gp/anti-CD3 bispecific antibody cytotoxic to human multidrug resistant KB cells].
Zhonghua Zhong Liu Za Zhi
; 27(11): 653-6, 2005 Nov.
Article
in Zh
| MEDLINE
| ID: mdl-16438884
ABSTRACT
OBJECTIVE:
To study the specific cytotoxicity mediated by anti-P-gp/anti-CD(3) diabodies in multidrug resistant solid tumor using P-gp as target.METHODS:
The anti-P-gp/anti-CD(3) diabodies were secreted from E. coli strain 16C9 containing the expression plasmid PAYZDCP, grown at 30 degrees C in a shaker flask; the diabodies were purified by affinity chromatography and identified by SDS-PAGE; the effect of the anti-P-gp/anti-CD(3) diabody mediated lysis of P-gp-expressing tumor cells was assayed by (51)Cr release assay in vitro, and by human KB nude mouse xenograft models in vivo.RESULTS:
The diabodies were generated by bacteria as a soluble functional form and purified by one-step affinity chromatography with a yield > 4 mg/L culture medium. In (51)Cr release assay, the diabodies targeted human activated T cells to lyse P-gp(+)-KB/MDR cells in a dose-dependent manner. It suggested that the diabody was able to induce an efficient lysis of the target cells by human T cells in vitro. When combined with activated human T cells, the diabody significantly inhibited the growth of KB/MDR, but had no effect on KB xenografts.CONCLUSION:
The anti-P-gp/anti-CD(3) bispecific antibody is a potent agent for targeting human T lymphocytes to lyse solid tumor cells overexpressing P-gp in vitro and in vivo.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
CD3 Complex
/
Antibodies, Bispecific
/
ATP Binding Cassette Transporter, Subfamily B, Member 1
/
Drug Resistance, Neoplasm
/
Neoplasms, Experimental
Limits:
Animals
/
Female
/
Humans
Language:
Zh
Journal:
Zhonghua Zhong Liu Za Zhi
Year:
2005
Type:
Article
Affiliation country:
China