Guidelines for Stability Testing of Protein Therapeutics

1) Purpose

The purpose of this SOP is to provide standardized procedures for conducting stability studies on protein therapeutics. Stability testing is essential to ensure that protein-based drugs maintain their safety, efficacy, and quality under various storage conditions throughout their shelf life.

2) Scope

This SOP applies to all protein therapeutics, including monoclonal antibodies, recombinant proteins, and fusion proteins, produced or handled by the organization. It is intended for personnel involved in formulation development, quality control, and regulatory compliance.

3) Responsibilities

Formulation Scientist: Responsible for designing the stability study protocol and selecting appropriate stability-indicating parameters.

Quality Control (QC) Team: Responsible for conducting stability tests according to the approved protocol and documenting results.

QA Team: Responsible for reviewing data, ensuring regulatory compliance, and approving the final stability report.

4) Procedure

4.1 Study Design:

1. Identify stability-indicating parameters (e.g., potency, purity, aggregation, and degradation) relevant to the protein
   

   Formulation Characterization and Stability of Protein Drugs

   therapeutic.
2. Select appropriate analytical methods (e.g., HPLC, SDS-PAGE, Mass Spectrometry) to evaluate these parameters.
3. Define storage conditions (e.g., refrigerated, frozen) based on the product’s characteristics and regulatory guidelines.
4. Develop a study protocol outlining the objectives, sampling schedule, and analytical methods to be used.

4.2 Sample Preparation:

1. Prepare samples from representative production batches and label them with batch