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Related Concept Videos

Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
Inhibitors Of Virion Release01:25

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Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...

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A Simple Alternative to Stereotactic Injection for Brain Specific Knockdown of miRNA
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Published on: December 26, 2015

Lentivirus-mediated antagomir expression.

Ewa Surdziel1, Matthias Eder, Michaela Scherr

  • 1Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Medizinische Hochschule Hannover, Hannover, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|September 10, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a lentivirus-based system for stable antagomir expression, enabling long-term silencing of microRNAs (miRNAs) and investigation of their functions. This method overcomes limitations of transient transfection for studying miRNA loss-of-function phenotypes.

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Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression at the post-transcriptional level.
  • Antagomirs, antisense oligonucleotides, inhibit miRNA function but often yield transient effects with conventional delivery.
  • Stable, long-term loss-of-function models are crucial for understanding specific miRNA roles.

Purpose of the Study:

  • To develop a lentivirus-based system for stable antagomir expression.
  • To enable long-term investigation of individual microRNA function through loss-of-function phenotypes.
  • To provide protocols for antagonizing miRNA function in diverse cell types.

Main Methods:

  • Utilizing lentiviral vectors for stable integration and expression of antagomirs.
  • Designing antagomirs complementary to specific microRNAs for targeted inhibition.
  • Applying the system to generate stable loss-of-function phenotypes in various cell lines.

Main Results:

  • Achieved stable and long-term inhibition of endogenous microRNA expression and function.
  • Demonstrated the system's efficacy in generating reliable loss-of-function phenotypes.
  • Validated the approach for studying miRNAs within polycistronic clusters.

Conclusions:

  • Lentiviral antagomir expression offers a robust method for sustained microRNA functional studies.
  • This strategy overcomes the limitations of transient delivery methods for miRNA research.
  • The developed protocols facilitate broad application in diverse cellular models for miRNA functional genomics.