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Therapeutic RNA Delivery for COVID and Other Diseases
Curtis Dobrowolski1, Kalina Paunovska1, Marine Z C Hatit1
1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, 30332, USA.
Abstract:
RNA can alter the expression of endogenous genes and can be used to express therapeutic proteins. As a result, RNA-based therapies have recently mitigated disease in patients. Yet most potential RNA therapies cannot currently be developed, in large part because delivering therapeutic quantities of RNA drugs to diseased cells remains difficult. Here, recent studies focused on the biological hurdles that make in vivo drug delivery challenging are described. Then RNA drugs that have overcome these challenges in humans, focusing on siRNA to treat liver disease and mRNA to vaccinate against COVID, are discussed. Finally, research centered on improving drug delivery to new tissues is highlighted, including the development of high-throughput in vivo nanoparticle DNA barcoding assays capable of testing over 100 distinct nanoparticles in a single animal.
Insights
RNA drug delivery faces biological hurdles, but advancements in small interfering RNA (siRNA) for liver disease and messenger RNA (mRNA) for COVID-19 vaccines show promise. New methods are improving delivery to diverse tissues.
Area of Science:
- Biotechnology
- Molecular Biology
- Drug Delivery Systems
Background:
- RNA therapeutics offer potential for treating diseases by modulating gene expression and protein production.
- Current RNA-based therapies are limited by challenges in delivering therapeutic quantities of RNA to target cells in vivo.
- Successful in vivo delivery is critical for the widespread development and application of RNA drugs.
Purpose of the Study:
- To review biological challenges in in vivo RNA drug delivery.
- To discuss successful RNA drug delivery strategies, including siRNA for liver disease and mRNA for COVID-19 vaccination.
- To highlight novel research aimed at improving RNA delivery to new tissues.
Main Methods:
- Review of recent studies on biological barriers to in vivo RNA delivery.
- Analysis of clinical applications of RNA drugs, specifically siRNA and mRNA.
- Description of high-throughput in vivo nanoparticle DNA barcoding assays for delivery testing.
Main Results:
- Significant progress has been made in overcoming biological hurdles for RNA drug delivery.
- siRNA has shown efficacy in treating liver diseases, and mRNA vaccines have been successful against COVID-19.
- Novel nanoparticle delivery systems and high-throughput assays are being developed to expand RNA therapy applications.
Conclusions:
- Despite delivery challenges, RNA-based therapies are demonstrating clinical success.
- Continued research into delivery mechanisms and nanoparticle technologies is crucial for advancing RNA therapeutics.
- Improved in vivo delivery will broaden the scope of diseases treatable with RNA-based drugs.
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