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Related Concept Videos

Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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Related Experiment Video

Updated: Jan 6, 2026

Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins
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Comparative Transcriptomics Analyses Identify DDX43 as a Cellular Regulator Involved in Suppressing HSV-2

Ranqing Cheng1,2, Yuncheng Li1,2, Yuhao Chen1,2

  • 1Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China.

Viruses
|October 29, 2025
PubMed
Summary

Researchers identified DDX43 as a key cellular factor that suppresses herpes simplex virus type 2 (HSV-2) replication. This discovery offers potential new antiviral targets for genital herpes, a condition lacking vaccines or cures.

Keywords:
DDX43HSV-2IFN-βtranscriptomics

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Area of Science:

  • Virology
  • Molecular Biology
  • Immunology

Background:

  • Genital herpes, primarily caused by herpes simplex virus type 2 (HSV-2), significantly increases HIV-1 transmission.
  • Current therapeutic options for HSV-2 are limited, with no available vaccines for prevention or complete cures.

Purpose of the Study:

  • To identify host factors regulating HSV-2 replication for novel antiviral target discovery.
  • To elucidate the mechanisms by which host factors modulate HSV-2 infection.

Main Methods:

  • Comparative transcriptomic analysis of HSV-2-infected epithelial cells (HeLa and ARPE-19).
  • Orthogonal partial least-squares discriminant analysis (OPLS-DA) to identify key differentiating host factors.
  • Experimental validation including gene overexpression and knockdown (DDX43).

Main Results:

  • Distinct host gene expression patterns were observed in HSV-2-infected HeLa and ARPE-19 cells.
  • DDX43 was identified as a principal mediator distinguishing host responses to HSV-2 infection.
  • Overexpression of DDX43 inhibited HSV-2 replication, while its knockdown enhanced it.
  • DDX43 suppresses HSV-2 replication independently of the interferon pathway.

Conclusions:

  • DDX43 acts as a host antiviral factor against HSV-2 infection.
  • Comparative transcriptomics is a powerful approach for identifying novel host proteins modulating viral replication.