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Related Concept Videos

Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
Vaccine Production01:23

Vaccine Production

Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...
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...
Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...

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Related Experiment Video

Updated: Jul 15, 2026

Synthesis and Characterization of mRNA-Loaded Poly(Beta Aminoesters) Nanoparticles for Vaccination Purposes
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Synthesis and Characterization of mRNA-Loaded Poly(Beta Aminoesters) Nanoparticles for Vaccination Purposes

Published on: August 13, 2021

Recent Progress in the Rational Design of mRNA Vaccines.

Zijia Guo1, Jiayan Fu1, Luna Ran1

  • 1National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, 310058 Hangzhou, China; MOE Laboratory of Biosystems Homeostasis & Protection, Innovation Center for Cell Signaling Network, College of Life Sciences, Zhejiang University, 310058 Hangzhou, China.

Molecular Therapy : the Journal of the American Society of Gene Therapy
|July 14, 2026
PubMed
Summary

Messenger RNA (mRNA) vaccines, including circular RNA (circRNA) and self-amplifying RNA (saRNA), show promise but face challenges. Recent advancements in sequence design, delivery, and computational tools are improving their efficacy and safety for infectious diseases and cancer.

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Last Updated: Jul 15, 2026

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Optimization of In vitro Transcription Reaction for mRNA Production Using Chromatographic At-Line Monitoring

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Area of Science:

  • Biotechnology
  • Vaccinology
  • Molecular Medicine

Background:

  • Messenger RNA (mRNA)-based vaccines, including circular RNA (circRNA) and self-amplifying RNA (saRNA), are revolutionary platforms with significant potential in prophylactic and therapeutic applications.
  • Key limitations include mRNA instability, inherent immunogenicity, and suboptimal in vivo protein expression.
  • Recent progress in mRNA sequence design and delivery technologies has addressed these challenges, enhancing vaccine efficacy and safety.

Purpose of the Study:

  • To review the current state of mRNA-based vaccines, encompassing conventional non-replicating mRNA, circRNA, and saRNA technologies.
  • To focus on recent advancements in sequence optimization, delivery systems, and computational approaches for vaccine design.
  • To outline existing manufacturing challenges and explore potential solutions for mRNA vaccine development.

Main Methods:

  • Review of recent scientific literature on mRNA vaccine technology.
  • Analysis of advancements in mRNA sequence design and optimization strategies.
  • Evaluation of novel delivery systems for mRNA therapeutics.
  • Exploration of computational technologies applied to vaccine design.
  • Identification of current manufacturing hurdles and proposed solutions.

Main Results:

  • Significant improvements in therapeutic protein production and vaccine efficacy/safety have been achieved through advanced mRNA sequence design and delivery technologies.
  • Emerging approaches like circRNA and saRNA offer alternative strategies to overcome limitations of conventional mRNA vaccines.
  • Computational technologies are increasingly vital for optimizing vaccine design and predicting immunogenicity.
  • Manufacturing challenges related to scalability, cost, and quality control are being actively addressed.

Conclusions:

  • mRNA-based vaccines represent a transformative technology with broad applications in infectious disease prevention and cancer immunotherapy.
  • Continued innovation in sequence optimization, delivery systems, and manufacturing processes is crucial for realizing the full potential of mRNA vaccines.
  • The integration of computational tools is accelerating the development and refinement of next-generation mRNA vaccines.