A comparative multi-tiered immunogenicity assessment of biosimilar pegylated filgrastim: validation of methods for clinical assessment of INTP5
| Autor: | Ronak Patel, Manish Kumar, Sridevi Khambhampaty, Prashant Kale, Pallavi Hajela |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Pharmacology
biology Filgrastim business.industry Immunogenicity Clinical Biochemistry Biosimilar Antibodies Neutralizing Polyethylene Glycols Titer Drug Discovery biology.protein Medicine Humans Antibody business Neutralizing antibody Biosimilar Pharmaceuticals Pegfilgrastim Immunogenicity Study medicine.drug |
| Zdroj: | Expert opinion on biological therapy. 22(2) |
| ISSN: | 1744-7682 |
| Popis: | BACKGROUND AND OBJECTIVE Validated and highly sensitive assays are required for comparative assessment of immunogenicity of biosimilars. For INTP5, a biosimilar pegylated filgrastim, the immunogenicity assessment included tiers that allowed for assessment of antibodies against the PEG and the Filgrastim moieties for comparative clinical immunogenicity assessment. METHODS Electrochemiluminescence immunoassay (ECLIA) was used for Screening, Specificity, and Titer assays for detecting anti-drug antibodies (ADAs) and cell-based method for neutralizing ADAs. The methods were validated to enable use of same methods irrespective of biosimilar or reference arms. RESULTS The ADA and cell-based assay for neutralizing antibody detection were validated with a sensitivity capable of detecting binding Anti-Pegfilgrastim antibody at ~40 ng/mL and Neutralizing antibody at ~380 ng/mL and used for a comparative immunogenicity study. Of 194 subjects, 10 subjects had confirmed positive anti-drug-antibody in the biosimilar arm and 9 in the reference arm. None of the subjects were detected with neutralizing anti-drug antibodies. CONCLUSION This work demonstrates the application of a rigorous approach toward validation of assays for immunogenicity studies for biosimilars. Highly sensitive, precise, and robust assays were used to conclude comparable low incidences of anti-drug antibodies in both biosimilar and innovator arms of the clinical study for Pegfilgrastim. |
| Databáze: | OpenAIRE |
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