Drying parameters and aging modulate protective properties of vitrified trehalose

Area of Science:

• Biochemistry
• Materials Science
• Molecular Biology

Background:

• Cold-chain storage of biological materials is costly and unreliable.
• Room-temperature dry storage offers a stable, low-cost alternative.
• Vitrified matrices, often using trehalose, stabilize biomolecules by limiting motion.

Purpose of the Study:

• To investigate how drying conditions and storage duration affect DNA, RNA, and enzyme stability in trehalose-based vitrified systems.
• To understand the relationship between vitrified matrix properties and biomolecule integrity.
• To identify optimal conditions for room-temperature preservation.

Main Methods:

• Vitrification of DNA, RNA, and enzymes in trehalose systems using various drying methods.
• Assessment of biomolecule stability after different storage durations.
• Measurement of vitrified system properties, including glass transition temperature.

Main Results:

• DNA stability was unaffected by drying or trehalose.
• RNA stability was moderate without trehalose but improved with it, though not consistently correlated with vitrified properties.
• Enzymes were protected by trehalose, with initial protection correlating with high glass transition temperature, but prolonged drying showed an inverse correlation due to physical aging.

Conclusions:

• Drying methods, environmental conditions, and storage duration significantly influence vitrified properties and biomolecule stability.
• Trehalose effectively stabilizes RNA and enzymes, but physical aging in prolonged storage can be detrimental.
• Findings guide the optimization of room-temperature preservation strategies for diverse biomolecules.