Stability Evaluation of the Biosimilar Monoclonal Antibody Using Analytical Techniques

Determination of the drug substance (DS) and drug product (DP) stability is especially important for biosimilar monoclonal antibodies since it can affect the quality, efficacy, and safety of the drugs. The main objective of this study was to determine the stability of the biosimilar candidate (TUR01) using state-of-the-art (current) analytical techniques.

Analytical techniques used in this study were isoelectric focusing on capillary electrophoresis, capillary electrophoresis-sodium dodecyl sulfate, size exclusion chromatography-ultra-high performance liquid chromatography, binding affinity, and physicochemical and microbiological tests. DS was kept in polyethylene terephthalate copolyester, glycol modified (PETG) bottles at ≤-65.0°C and 5.0 ± 3.0°C for 18 months, where the pre-filled syringe stability study was conducted at 5.0 ± 3.0°C for 24 months and 25.0 ± 2.0°C/60% ± 5 relative humidity (RH) for 6 months. The accelerated condition for DS was accepted as 5.0 ± 3.0°C, while it was 25.0 ± 2.0°C for the DP.

The results indicated that TUR01 DS was stable when it was stored under long-term storage conditions at ≤-65°C and at 5 ± 3°C at least 18 months. Also, TUR01 DP was stable at 5 ± 3°C for 24 months and at 25 ± 2°C with 60.5% RH for 2 months without any significant changes.

State-of-the-art analytical techniques proved to be invaluable tools for evaluate the stability of the TUR01 DS and drug product.