Evaluation of Crystal Zenith Microtiter Plates for High-Throughput Formulation Screening

Area of Science:

• Biopharmaceutical development
• Formulation science
• Analytical chemistry

Background:

• Biotherapeutic formulation screening requires extensive material, especially for high-concentration products.
• Traditional stability studies using vials are resource-intensive.

Purpose of the Study:

• To evaluate Crystal Zenith (CZ) microtiter plates as a small-volume, high-throughput system for biotherapeutic formulation stability studies.
• To compare the performance of CZ plates with traditional vials regarding evaporation, edge effects, and stability.

Main Methods:

• Evaluated evaporation and edge effects in CZ plates with FluoroTec-coated mats.
• Compared stability of multiple antibodies and formulations in CZ plates versus type 1 glass and CZ vials.
• Assessed stability using high molecular weight, percent main peak, and multi-attribute methods.
• Analyzed subvisible particle counts.

Main Results:

• Minimal evaporation observed at 4°C; reduced at higher temperatures with sealed bags.
• Edge effects were not significant until 12 weeks at 40°C.
• Stability rankings (high molecular weight, main peak) were comparable between plates and vials at 4°C and 40°C up to 12 weeks.
• Product quality attributes measured by multi-attribute method were consistent across container types.
• CZ plates showed lower subvisible particle counts compared to vials.

Conclusions:

• CZ microtiter plates are a viable alternative to traditional vials for small-volume, high-throughput formulation stability screening.
• The system conserves valuable biotherapeutic material.
• Further investigation into subvisible particle differences may be warranted.