Caveolae in the uptake and targeting of infectious agents and secreted toxins

L C Norkin1

  • 1Department of Microbiology, University of Massachusetts, 203 Morrill Science Center IVN, Amherst, MA 01003-5720, USA. lnorkin@microbio.umass.edu

Insights

Microbial pathogens and toxins utilize caveolae-mediated entry, influencing host cell interactions and offering potential for research and therapeutic applications.

Area of Science:

  • Cell Biology
  • Microbiology
  • Virology

Background:

  • Caveolae are specialized membrane domains involved in cellular processes.
  • Pathogens and toxins can exploit cellular entry mechanisms.

Purpose of the Study:

  • To explore the role of caveolae in microbial and toxin cellular entry.
  • To understand the implications of caveolae-mediated entry on host-pathogen interactions.
  • To investigate the potential of caveolae in research and therapeutic applications.

Main Methods:

  • Literature review and analysis of existing research on caveolae and microbial entry.
  • Examination of cellular trafficking pathways.
  • Exploration of potential applications in gene and drug delivery.

Main Results:

  • Viruses, intracellular bacteria, prions, and bacterial toxins use caveolae for cellular entry.
  • Caveolae-mediated entry leads to distinct intracellular destinations.
  • This pathway impacts host cell-pathogen interactions and immune responses.
  • SV40 virus entry via caveolae can probe intracellular trafficking.
  • Caveolae-mediated viral entry holds potential for gene and drug delivery vectors.

Conclusions:

  • Caveolae-mediated entry is a significant pathway for various pathogens and toxins.
  • This pathway has profound implications for host-pathogen interactions and cellular processes.
  • Caveolae represent a promising avenue for developing novel research tools and therapeutic strategies.

Related Concept Videos

Clathrin Coated Vesicles01:12

Clathrin Coated Vesicles

Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
Receptor-mediated Endocytosis01:20

Receptor-mediated Endocytosis

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.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Receptor-mediated Endocytosis01:48

Receptor-mediated Endocytosis

Receptor-mediated endocytosis is a process through which bulk amounts of specific molecules can be 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 and give it its round form.Clathrin-Mediated Endocytosis of LDLOne well-characterized example...
Receptor-Mediated Endocytosis01:20

Receptor-Mediated Endocytosis

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.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Intralumenal Vesicles and Multivesicular Bodies01:38

Intralumenal Vesicles and Multivesicular Bodies

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...
Overview of Secretory Vesicles01:33

Overview of Secretory Vesicles

Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...