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Leveraging Rational Protein Engineering to Improve mRNA Therapeutics
Jeremiah D Farelli1, Kirtika H Asrani1, Cleo Isaacs1
11 Discovery Research, Alexion Pharmaceuticals, Inc. , Cambridge, Massachusetts.
Nucleic Acid Therapeutics
|February 14, 2018
Summary
Messenger RNA (mRNA) therapeutics offer advantages but have short half-lives. Protein engineering can enhance mRNA expression, duration, and activity for improved in vivo therapies.
Area of Science:
- Biotechnology
- Molecular Biology
- Therapeutic Development
Background:
- Messenger RNA (mRNA) therapeutics show promise for various diseases, including immunology, oncology, vaccines, and metabolic disorders.
- Advantages over DNA gene therapy include no need for nuclear import/transcription and reduced genomic integration risk.
- A key limitation of mRNA therapy is its short in vivo half-life (approximately 6-12 hours), necessitating repeated dosing for conditions like metabolic disorders.
Purpose of the Study:
- To investigate protein engineering strategies to overcome the short in vivo half-life of mRNA therapeutics.
- To enhance mRNA translation efficiency and protein longevity for improved therapeutic outcomes.
- To increase the enzymatic activity of target proteins for more effective disease treatment.
Main Methods:
- Sequence engineering of proteins to improve translation and extend protein duration.
- In vitro assessment of engineered proteins for expression levels and enzymatic activity.
- In vivo validation of engineered protein therapies in wild-type mice.
Main Results:
- Demonstrated successful sequence engineering to improve protein expression and duration in vitro.
- Confirmed enhanced enzymatic activity of engineered proteins.
- Validated the improved performance of engineered proteins in vivo in mouse models.
Conclusions:
- Rational protein engineering is a viable strategy to enhance mRNA therapeutic efficacy.
- Engineered proteins can overcome the limitations of short mRNA half-life for in vivo applications.
- This approach holds potential for developing more durable and effective mRNA-based treatments.
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