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Mitochondria as a centrally positioned hub in the innate immune response

Rajat Sandhir1, Avishek Halder1, Aditya Sunkaria1

  • 1Department of Biochemistry, Panjab University, Chandigarh, India.

Biochimica Et Biophysica Acta. Molecular Basis of Disease
|October 31, 2016
PubMed

Insights

Mitochondria play a key role in the innate immune response by triggering inflammasome activation through mechanisms like mitochondrial ROS production and mtDNA release. Modulating these mitochondrial pathways may offer therapeutic benefits for various inflammatory conditions.

Area of Science:

  • Cellular Biology
  • Immunology
  • Mitochondrial Biology

Background:

  • Mitochondria are essential for cellular functions, including energy metabolism and survival.
  • Emerging evidence highlights mitochondria's role as a signaling platform in innate immunity.
  • Mitochondrial dysfunction is implicated in various stress responses and diseases.

Purpose of the Study:

  • To review the role of mitochondria in activating innate immune signaling pathways.
  • To explore the mechanisms by which mitochondria trigger inflammasome activation.
  • To discuss the potential of targeting mitochondria-mediated inflammasome activation for therapeutic interventions.

Main Methods:

  • Review of current literature on mitochondrial signaling in innate immunity.
  • Discussion of key mitochondrial components involved in immune activation (mtROS, mtDNA, MAVS).
  • Explanation of pattern recognition receptor (PRR) pathways leading to inflammasome assembly.

Main Results:

  • Mitochondrial ROS (mtROS) production, mitochondrial DNA (mtDNA) release, and MAVS are critical initiators of innate immune responses.
  • PRRs, including RLRs, CLRs, TLRs, and NLRs, mediate these mitochondrial signals.
  • Mitochondria-induced inflammasome activation leads to caspase-1 activation and subsequent cytokine maturation (IL-1β, IL-18).

Conclusions:

  • Mitochondria are central players in the innate immune response, particularly in inflammasome activation.
  • Mitochondrial dysfunction and subsequent inflammatory processes are implicated in diverse pathophysiological conditions.
  • Targeting mitochondria-mediated inflammasome activation presents a promising therapeutic strategy for inflammatory disorders.
Keywords:
Inflammasome: innate immune responseInflammationMitochondriaNLRP3

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