Stability analysis of chemically modified mRNA using micropattern-based single-cell arrays.

Area of Science:

• Molecular Biology
• Biotechnology
• Cell Biology

Background:

• Accurate measurement of mRNA turnover is crucial for developing stable mRNA constructs for RNA-based therapies.
• Understanding mRNA degradation rates is key to controlling protein expression levels.

Purpose of the Study:

• To develop and validate a high-throughput method for measuring mRNA turnover in living cells.
• To compare the impact of different 5' and 3' untranslated region (UTR) sequences on mRNA stability and protein expression.
• To investigate the relationship between mRNA functional lifetime and time-integrated protein levels.

Main Methods:

• Automated time-lapse microscopy combined with micropatterned arrays for single-cell monitoring.
• Fluorescent reporter protein expression analysis to track mRNA dynamics.
• Mathematical modeling to correlate mRNA lifetime with protein production.

Main Results:

• The developed method enables efficient, high-throughput monitoring of mRNA expression and degradation at the single-cell level.
• UTR-stabilized mRNA constructs exhibit longer functional half-lives compared to destabilized constructs.
• Reporter protein lifetime is constant and narrowly distributed, independent of mRNA stabilization strategies.
• mRNA functional lifetime accurately predicts the time-integrated protein level (Area Under the Curve).

Conclusions:

• This approach allows for quantitative assessment of mRNA functional lifetime heterogeneity.
• The findings provide a foundation for designing more effective mRNA-based therapeutics by optimizing mRNA stability.
• The study highlights the significant role of UTR sequences in modulating mRNA stability and protein expression.