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Updated: Feb 8, 2026

Generation of Monoclonal Antibodies Against Natural Products
Published on: April 6, 2019
A bridging immunogenicity assay for monoclonal antibody: case study with SHR-1222
Dan Zhang1,2, Changyong Yang3,4,5, Xiaoyan Chen1
1State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai 201203, PR China.
Aim:
SHR-1222 is a humanized monoclonal antibody targeted to soluble sclerostin. To support the preclinical study of SHR-1222 in cynomolgus monkeys, a method for the detection of anti-drug antibodies is required.
Results:
A bridging immunogenicity method for the detection of anti-SHR-1222 antibodies was developed and validated. In the method, minimal required dilution, normalization factor and confirmatory cut point were 1:20, 4.35 and 10.45%, respectively. The method was successfully applied to evaluate a multiple-dose toxicity study in monkeys.
Conclusion:
The proposed method allows for the detection of anti-SHR-1222 antibodies in preclinical studies and aids in the interpretation of pharmacokinetic changes in certain animals. The soluble targets interference on anti-drug antibody detection can be blocked or decreased by the therapeutic drug.
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