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Nonclinical assessments of the potential biosimilar PF-06439535 and bevacizumab. | LitMetric

Nonclinical assessments of the potential biosimilar PF-06439535 and bevacizumab.

Regul Toxicol Pharmacol

Drug Safety Research and Development, Pfizer Inc, 610 Main St, Cambridge, MA 02139, USA. Electronic address:

Published: June 2018

AI Article Synopsis

Article Abstract

Bevacizumab, a recombinant humanized monoclonal antibody targeting vascular endothelial growth factor (VEGF), is approved for treatment of metastatic colorectal cancer, nonsquamous non-small-cell lung cancer, metastatic kidney cancer, and glioblastoma. To support clinical development of the potential bevacizumab biosimilar PF-06439535, nonclinical studies evaluated structural, functional, toxicological, and toxicokinetic similarity to bevacizumab sourced from the European Union (bevacizumab-EU) and United States (bevacizumab-US). Peptide mapping demonstrated the amino acid sequence of PF-06439535 was identical to bevacizumab-EU and bevacizumab-US. Biologic activity, measured via inhibition of VEGF-induced cell proliferation in human umbilical vein endothelial cells and binding to VEGF isoforms, was similar across the three drugs. In vivo similarity was demonstrated in cynomolgus monkeys administered intravenous PF-06439535 or bevacizumab-EU (0 or 10 mg/kg/dose twice weekly for 1 month; total of nine doses). Systemic exposure appeared similar and test article-related effects were limited to physeal dysplasia of the distal femur. The potential for non-target-mediated toxicity of PF-06439535 was evaluated in rats administered intravenous PF-06439535 (15 or 150 mg/kg/dose twice weekly for 15 days; total of five doses). Nonadverse higher liver weights and minimal sinusoidal cell hyperplasia were observed. Collectively, these studies demonstrated similarity of PF-06439535 to bevacizumab, supporting entry into clinical development.

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Source
http://dx.doi.org/10.1016/j.yrtph.2018.03.020DOI Listing

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