Related Experiment Video
Updated: May 20, 2026
Quantifying Antibody-Dependent Cellular Cytotoxicity in a Tumor Spheroid Model: Application for Drug Discovery
Published on: April 26, 2024
[Antitumor effect of adriamycin conjugated with downsized anti-endoglin monclonal antibody]
Ling Li1, Feng-ying Huang, Yong-hao Huang
1Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou 571101, China.
Objective:
To study the antitumor efficacy of an immunoconjugate composed of adriamycin (ADM) and downsized Fab fragment of mouse anti-Endoglin monoclonal antibody.
Methods:
The Fab fragment of mouse anti-Endoglin monoclonal antibody was downsized and conjugated with ADM by m-Maleimidobenzoyl-N-hydroxysuccinimide ester (MBS). The antitumor effect of the conjugate was tested in mice bearing subcutaneous injection of H22 tumor in vivo.
Results:
The molecular ratio of Fab:ADM in conjugate was approximately 1:2. The Fab-ADM conjugate inhibited the growth of H22 by 91.94% on day 14 after injection at the dose of 0.4 mg/ kg, much higher the inhibition rate of 25.00% by the equivalent dose of free ADM. The median survival time of the mice treated with the conjugate was longer than those treated with free ADM. The Fab-ADM conjugate was significantly more effective than free ADM in tumor suppression and life span prolongation.
Conclusion:
Fab -ADM displayed more significant antitumor efficacy than free ADM in vivo and might be a novel candidate for cancer treatment.
