Towards the Development of an Insulin Degradation Test

Area of Science:

• Biochemistry
• Materials Science
• Endocrinology

Background:

• Diabetes management relies on exogenous insulin, but its instability causes significant costs and health risks.
• Insulin formulations are prone to environmental stress, leading to misfolding, aggregation into fibrils, and loss of efficacy.
• Current methods for detecting insulin fibrillation are limited to laboratory settings, hindering real-world quality control.

Purpose of the Study:

• To compare biochemical methods for assessing bioactivity and structural integrity of insulin analogs under stress.
• To investigate the relationship between insulin fibrillation and loss of bioactivity.
• To demonstrate the feasibility of an antibody-based test for detecting insulin fibrillation.

Main Methods:

• Commercial insulin analogs were exposed to various stress conditions.
• Biochemical techniques were used to assess bioactivity and structural integrity.
• Monoclonal antibodies were tested for their ability to detect insulin fibrillation.

Main Results:

• Fibril formation was observed to precede measurable loss of insulin bioactivity.
• Insulin fibrillation was dependent on both the type of stressor and the specific insulin formulation.
• Antibody-based detection of insulin fibrillation was demonstrated as a proof-of-concept.

Conclusions:

• Accessible insulin quality testing is critically needed to ensure patient safety and reduce costs.
• Antibody-based detection offers a feasible approach for identifying insulin fibrillation outside of laboratory settings.
• Understanding insulin's stability is crucial for improving diabetes management and patient outcomes.