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Related Concept Videos

Receptor-mediated Endocytosis01:20

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Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
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Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
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Rotavirus cell entry: not so simple after all.

Carlos F Arias1, Susana López1

  • 1Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Colonia Chamilpa, Cuernavaca, Morelos, Mexico.

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Rotaviruses cause severe gastroenteritis in children. This review details how rotaviruses attach to cells via histo-blood group antigens, influencing their entry and spread.

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Area of Science:

  • Virology
  • Cell Biology
  • Gastroenterology

Background:

  • Rotaviruses are a leading cause of severe gastroenteritis in young children globally.
  • Rotaviruses exhibit selective cell and tissue tropism, alongside age and host restrictions.
  • Histo-blood group antigens (HBGAs) on cell surfaces are increasingly recognized for their role in rotavirus tropism.

Purpose of the Study:

  • To review the current understanding of rotavirus entry mechanisms.
  • To elucidate the role of initial virus-host interactions in determining infection pathways.
  • To explore how these interactions influence intracellular trafficking and endosomal escape.

Main Methods:

  • Literature review of studies on rotavirus-host interactions.
  • Analysis of research on cell surface receptors and viral entry pathways.
  • Synthesis of data on signaling cascades involved in rotavirus intracellular transport.

Main Results:

  • Initial rotavirus attachment to HBGAs is critical for cell tropism and host restriction.
  • Post-attachment interactions further define susceptibility to infection, particularly in human enteroids.
  • Early virus-cell interactions dictate the entry route and subsequent intracellular trafficking, including endosomal escape.

Conclusions:

  • Understanding rotavirus entry is key to explaining its pathogenesis and host specificity.
  • HBGAs play a pivotal role in the initial stages of rotavirus infection.
  • Further research into rotavirus entry mechanisms can inform therapeutic strategies against rotavirus gastroenteritis.