Detection of liposome lysis utilizing an enzyme-substrate system

Area of Science:

• Biochemistry
• Nanotechnology
• Drug Delivery Systems

Background:

• Liposomes are crucial for drug delivery, but verifying molecule encapsulation and release remains challenging.
• Current methods often involve multiple enzymes or fluorescent reporters, leading to potential inaccuracies and false negatives.
• A reliable and simplified reporter system is needed to accurately assess liposome integrity and payload release.

Purpose of the Study:

• To develop and validate a novel, single-enzyme optical reporter system for monitoring liposome encapsulation and release.
• To provide a more accurate and reliable alternative to existing reporter systems.
• To confirm liposome formation and assess release triggered by lysis agents.

Main Methods:

• Encapsulation of o-nitrophenyl-β,D:-galactopyranoside (ONPG) within liposomes.
• Quantification of released o-nitrophenol (ONP) via enzymatic hydrolysis by β-galactosidase.
• Verification of liposome formation and induced release using Triton X-100 lysis.

Main Results:

• The developed optical reporter system successfully verified liposome encapsulation of ONPG.
• The system accurately detected the release of ONPG upon liposome lysis.
• Enzyme-based detection provided clear and reliable data, avoiding issues associated with fluorescent reporters.

Conclusions:

• A novel, single-enzyme optical reporter system offers a robust method for verifying liposome encapsulation and release.
• This system enhances accuracy and reliability in liposome-based research and drug delivery applications.
• The protocol simplifies detection, reducing the risk of false negatives and improving data integrity.