Related Experiment Video

Updated: May 9, 2026

In Vitro Synthesis of Modified mRNA for Induction of Protein Expression in Human Cells
10:07

In Vitro Synthesis of Modified mRNA for Induction of Protein Expression in Human Cells

Published on: November 13, 2014

25.1K

Investigation of in vitro delivery conditions for self-amplifying mRNA

Wenting Li1,2,3,4, Yiming Wang1,2,3, Yi-Xin Huo5,6

  • 1Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.

Bioprocess and Biosystems Engineering
|August 5, 2025
PubMed

Insights

Self-amplifying mRNA (SAM) and non-replicating mRNA (NRM) exhibit distinct transfection efficiencies. This study optimized SAM transfection parameters, establishing an in vitro system for evaluating nucleic acid drug carriers and advancing low-dose immunization strategies.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Vaccine Development

Background:

  • Self-amplifying mRNA (SAM) offers potential for vaccines and gene therapy due to its self-replication.
  • Existing research lacks detailed parameter optimization and clear differentiation from non-replicating mRNA (NRM).

Purpose of the Study:

  • To evaluate and compare the transfection efficiency of NRM and SAM platforms.
  • To optimize parameters for SAM transfection and establish an in vitro multi-parameter delivery system.
  • To provide insights into SAM transfection distinct from conventional mRNA.

Main Methods:

  • Comparative analysis of delivery vectors for NRM and SAM transfection.
  • Systematic optimization of SAM transfection parameters, including dose and incubation time.
  • Construction of an in vitro multi-parameter delivery system for SAM.

Main Results:

  • SAM and NRM demonstrated similar transfection preferences but differed in efficiency.
  • Optimized parameters for SAM transfection were successfully established.
  • An in vitro system was developed to differentiate SAM from NRM transfection.

Conclusions:

  • The study provides an experimental basis for screening nucleic acid drug carriers.
  • Established criteria for SAM multi-parameter evaluation are crucial for its development.
  • Findings lay the foundation for optimizing low-dose immunization strategies and clinical translation.
Keywords:
Drug deliveryNon-replicating mRNANucleic acidSelf-amplifying mRNATransfection

More Related Videos

An Oligonucleotide-based Tandem RNA Isolation Procedure to Recover Eukaryotic mRNA-Protein Complexes09:45

An Oligonucleotide-based Tandem RNA Isolation Procedure to Recover Eukaryotic mRNA-Protein Complexes

Published on: August 18, 2018

11.2K
An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics09:52

An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics

Published on: September 15, 2020

3.2K

Related Concept Videos

Nuclear Export of mRNA02:31

Nuclear Export of mRNA

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...
Regulation of Expression Occurs at Multiple Steps02:24

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Regulated mRNA Transport02:22

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 specific...
Leaky Scanning02:28

Leaky Scanning

During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Regulated mRNA Transport02:22

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 specific...