Peroxisomes and the antiviral responses of mammalian cells

Charlotte Odendall1, Jonathan C Kagan

  • 1Harvard Medical School and Division of Gastroenterology, Boston Children's Hospital, Boston, MA, 02115, USA.

Insights

Peroxisomes, crucial for cellular metabolism, are increasingly recognized for their significant role in viral infections. Emerging research highlights their involvement beyond basic cellular functions.

Area of Science:

  • Cell biology
  • Microbiology
  • Virology

Background:

  • Peroxisomes are ancient organelles with established roles in lipid and oxygen homeostasis.
  • Interactions between microorganisms and host intracellular organelles are not fully understood.
  • The specific role of peroxisomes in microbial infections remains largely unclear.

Purpose of the Study:

  • To discuss emerging evidence on the role of peroxisomes in viral infections.
  • To highlight the importance of peroxisomes beyond their known metabolic functions.

Main Methods:

  • This chapter synthesizes existing research and emerging evidence.
  • Literature review of studies investigating peroxisome function in host-pathogen interactions.

Main Results:

  • Peroxisomes are implicated in cellular metabolism and homeostasis.
  • Emerging evidence suggests peroxisomes play a significant role in viral infections.

Conclusions:

  • Peroxisomes are vital cellular components with functions extending to antiviral defense.
  • Further research into peroxisome-viral interactions is warranted.

Related Concept Videos

Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Peroxisomes and Mitochondria01:30

Peroxisomes and Mitochondria

Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within peroxisomes...
Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
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Protein Import into the Peroxisomes01:27

Protein Import into the Peroxisomes

Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
Inhibitors of Viral Protein Synthesis01:30

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...