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Regulated mRNA Transport

Regulated mRNA Transport

Regulated mRNA Transport

Regulated mRNA Transport

In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...

mRNA Stability and Gene Expression

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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability

Nucleic Acid Structure

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
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Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...

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Updated: Apr 5, 2026

Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA

Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA

Published on: February 1, 2019

Biomaterials for mRNA delivery.

Mohammad Ariful Islam¹, Emma K G Reesor, Yingjie Xu

¹Laboratory for Nanoengineering & Drug Delivery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. jinjun.shi@zeus.bwh.harvard.edu.

Biomaterials Science

|August 18, 2015

Summary

This summary is machine-generated.

Messenger RNA (mRNA) offers advantages over DNA therapies but faces delivery challenges. Advanced biomaterials and nanotechnology are crucial for overcoming these hurdles and enabling mRNA therapeutics.

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Area of Science:

Biotechnology
Nanomedicine
Molecular Biology

Background:

Messenger RNA (mRNA) presents a promising alternative to DNA-based therapies due to its unique advantages.
mRNA therapies avoid nuclear entry and genomic integration, mitigating risks of harmful genetic alterations.
Chemical modifications enhance mRNA stability and reduce innate immune responses, while rapid expression and predictable kinetics are beneficial.

Purpose of the Study:

To provide an overview of current biomaterials and nanotechnology for mRNA delivery.
To discuss the challenges and future prospects of mRNA therapeutic development.

Main Methods:

Review of state-of-the-art biomaterials for mRNA delivery.
Analysis of nanotechnology platforms enabling mRNA transfection.
Discussion of mRNA characteristics impacting therapeutic applications.

Main Results:

mRNA offers advantages like no nuclear entry and no genomic integration.
Chemical modifications improve mRNA stability and reduce immunogenicity.
Challenges include mRNA's size, charge, and susceptibility to degradation.

Conclusions:

Refined mRNA delivery systems are essential for therapeutic development.
Biomaterials and nanotechnology are key to overcoming current mRNA limitations.
Future prospects involve translating these advanced delivery technologies into clinical practice.