Related Experiment Video
Updated: Jun 20, 2026

09:05
MicroRNA-based Regulation of Picornavirus Tropism
Published on: February 6, 2017
MicroManipulating viral-based therapeutics.
1Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA. Benjamin.tenOever@mssm.edu
Discovery Medicine
|October 1, 2009
Summary
Viral vectors show promise for cancer therapy and gene delivery, but clinical trials face challenges with toxicity and control. Exploiting microRNA expression offers a new strategy to enhance in vivo control of viral vectors.
Area of Science:
- Biotechnology
- Molecular Biology
- Virology
Background:
- Viral vectors are promising therapeutic tools for cancer treatment and gene delivery due to their molecular specificity.
- However, early clinical trials have been hampered by poor performance, toxicity, and uncontrolled genetic regulation or replication.
- Existing strategies to mitigate toxicity, such as receptor modification and tissue-specific promoters, have limitations.
Purpose of the Study:
- To explore novel strategies for improving in vivo control of viral vectors in therapeutic applications.
- To address the limitations of current methods for managing viral vector toxicity and tropism.
Main Methods:
- Investigated the potential of microRNA (miRNA) expression for controlling viral tropism.
- Evaluated strategies for enhancing specificity and safety in viral vector-based therapeutics.
Main Results:
- Recent advancements demonstrate the successful exploitation of microRNA expression to limit viral tropism.
- This approach offers a promising avenue for overcoming previous challenges in viral vector control.
Conclusions:
- MicroRNA-mediated control represents a significant advancement in enhancing the safety and efficacy of viral vector therapeutics.
- This strategy may revitalize the field of viral vector-based therapies by improving in vivo controllability.
More Related Videos
Related Concept Videos
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.
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...

