Cited by 960Mitochondrial Function and PathologyAutophagy in Disease and TherapyImmune Response and Inflammation

Mitochondria in the Regulation of Innate and Adaptive Immunity

Open access
Weinberg, Samuel E., Sena, Laura A., Chandel, Navdeep S.·2015·Immunity

Abstract

Summary Mitochondria are well appreciated for their role as biosynthetic and bioenergetic organelles. In the past two decades, mitochondria have emerged as signaling organelles that contribute critical decisions about cell proliferation, death and differentiation. Mitochondria not only sustain immune cell phenotypes but also are necessary for establishing immune cell phenotype and their function. Mitochondria can rapidly switch from primarily being catabolic organelles generating ATP to anabolic organelles that generate both ATP and building blocks for macromolecule synthesis. This enables them to fulfill appropriate metabolic demands of different immune cells. Mitochondria have multiple mechanisms that allow them to activate signaling pathways in the cytosol including altering in AMP/ATP ratio, the release of ROS and TCA cycle metabolites, as well as the localization of immune regulatory proteins on the outer mitochondrial membrane. In this Review, we discuss the evidence and mechanisms that mitochondrial dependent signaling controls innate and adaptive immune responses.

AI snapshot

Written from the paper’s full text.

TL;DR

This review argues that mitochondria are not only bioenergetic and biosynthetic organelles but also signaling hubs that shape innate and adaptive immune cell fate and function. It synthesizes evidence that mitochondrial ROS, TCA-cycle metabolites, and outer-membrane scaffolding regulate macrophage polarization, inflammasome/RLR antiviral responses, T cell activation/differentiation, and memory T cell formation.

Key findings

  • Mitochondria balance ATP production and biosynthesis: oxidation of pyruvate and palmitate generates 31.5 and 113 ATP, respectively, compared with 2 ATP from glycolysis; TCA-cycle intermediates also support macromolecule synthesis and signaling.
  • Mitochondrial ROS and metabolites regulate innate immunity: TLR signaling can increase mitochondrial ROS for bactericidal activity, succinate stabilizes HIF-1α to induce IL-1β, and mitochondrial ROS, oxidized mtDNA, and cardiolipin promote NLRP3 inflammasome activation.
  • Mitochondrial outer-membrane localization is required for RLR antiviral signaling via MAVS, including at mitochondrial-associated ER membranes; mitochondrial dynamics and membrane potential also influence RLR signaling.
  • Adaptive immunity depends on mitochondrial metabolism: T cell activation requires mitochondrial ROS for optimal NFAT, NF-κB, and proximal TCR signaling; Tregs rely on AMPK-dependent fatty acid oxidation, Th17 cells on glycolysis and de novo fatty acid synthesis, and CD8+ memory T cells on fatty acid oxidation/spare respiratory capacity fueled by lysosomal lipolysis.

Methods

  • Narrative review; no primary experimental design, sample, or statistical analysis is reported. The authors synthesize published literature on mitochondrial signaling in innate and adaptive immune cells.

Limitations

  • Stated: the authors note that several mechanisms discussed lack in vivo evidence and call for future genetic and targeted small-molecule studies in complex organismal immune responses.
  • Stated: mechanistic details remain unresolved, including critical mitochondrial ROS targets, how peroxisomes, ER, and mitochondria communicate, and whether TCA intermediates such as acetyl-CoA, α-ketoglutarate, and citrate alter immune activation like succinate.
  • Evident: as a narrative review, it does not provide systematic search methods or primary data; the authors also note that pharmacologic inhibition can affect multiple cell types and make conclusions difficult to interpret.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.immuni.2015.02.002

Cites

124 of 124 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 40 cited sources checked · 0 supported · 0 flagged

  • Premisecitation

    MAVS localization to the outer mitochondrial membrane is indispensable for its function in RLR signaling.

    “A breakthrough in establishing the role for mitochondria in RLR-activated antiviral immunity was the identification of the RLR mitochondrial adaptor protein MAVS (mitochondrial antiviral-signaling protein)(Kawai et al., 2005; Meylan et al., 2005; Seth et al., 2005; Xu et al., 2005) localization to the outer mitochondrial membrane is indispensable for its function.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Kawai et al., 2005 source

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    • cites Meylan et al., 2005 source

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    • cites Seth et al., 2005 source

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  • Interpretationnone given

    Mitochondria act as signaling organelles that influence cell proliferation, death, and differentiation.

    “Mitochondria are well appreciated for their role as biosynthetic and bioenergetic organelles. In the past two decades, mitochondria have emerged as signaling organelles that contribute critical decisions about cell proliferation, death and differentiation.”
    Quote in the paperSubstantial claim
  • Premisecitation

    Inhibiting fatty acid oxidation with etomoxir reduces EAE disease severity.

    “unexpectedly fatty acid oxidation inhibition by etomoxir reduces disease severity of EAE (Shriver and Manchester, 2011).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Shriver and Manchester, 2011

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  • Interpretationreasoning

    Mitochondria are central metabolic hubs necessary for both maintenance and establishment of immune cell phenotypes.

    “Mitochondria are central hubs of metabolism thus have emerged to be necessary for both the maintenance and establishment of immune cell phenotypes.”
    Quote in the paperSubstantial claim
  • Interpretationreasoning

    Collectively, the cited metabolic studies suggest that mitochondrial function controls the balance between inflammatory and suppressive CD4+ T helper lineages.

    “Nevertheless, collectively these emerging metabolic studies suggest that mitochondrial metabolism function dictates the different inflammatory and suppressive CD4+ T helper lineages.”
    Quote in the paperSubstantial claim
  • May combine two claims. 18
  • May combine two claims.

    Premisecitation

    Mitochondrial fusion promotes RLR signaling, whereas mitochondrial fission inhibits it.

    “Multiple studies have demonstrated that mitochondrial fusion promotes, whereas mitochondrial fission inhibits RLR signaling (Castanier et al., 2010; Yasukawa et al., 2009; Zhao et al., 2012).”
    Quote in the paperSubstantial claim0 of 3 sources checked
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    • cites Yasukawa et al., 2009 source

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    Premisecitation

    Memory CD8+ T cells (Tm) contain more mitochondria and have greater spare respiratory capacity, supported by fatty acid oxidation for ATP production.

    “Tm cells display increased mitochondrial number and spare respiratory capacity, which is fueled by fatty acid oxidation to generate copious amount of ATP (Pearce et al., 2009; van der Windt et al., 2012).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Pearce et al., 2009 source

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    • cites van der Windt et al., 2012 source

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    • Rests on an assumption: Fatty acid oxidation yields nearly three times as much ATP as mitochondrial glucose oxidation.
  • May combine two claims.

    Premisecitation

    Mitochondrial ROS regulate metabolic adaptation, differentiation, and proliferation.

    “Recent studies indicate that mitochondrial ROS regulate metabolic adaptation, differentiation and proliferation (Sena and Chandel, 2012).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Sena and Chandel, 2012 source

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    Interpretationcitation

    M2 macrophage polarization requires mitochondrial fatty acid oxidation, and inhibiting CPT1 with etomoxir blocks classic M2 gene expression.

    “The carnitine palmitoyltransferase-1 (CPT1) inhibitor etomoxir, which inhibits fatty acid translocation into the mitochondria, is sufficient to inhibit expression of classic M2 genes indicating that the increase in mitochondrial metabolism is not simply an effect of STAT6 activation needed for sustaining the M2 phenotype, but is in fact a driver of M2 macrophage activation and function.”
    Quote in the paperSubstantial claim
    • The authors state this as an assumption: The M1/M2 macrophage classification, though imperfect, is a useful model for studying metabolic differences between macrophages with different functions.
  • May combine two claims.

    Premisecitation

    Mitochondrial ROS are necessary for optimal NLRP3 inflammasome activation, though calcium influx and potassium efflux also regulate it.

    “It is important to note that mitochondrial ROS are necessary for optimal activation of NLRP3 inflammasome as other key activators such as influx of calcium and potassium efflux are also major regulators of NLRP3 inflammasome (Gurung et al., 2014).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Gurung et al., 2014

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  • May combine two claims.

    Interpretationnone given

    Mitochondria activate cytosolic signaling by changing AMP/ATP ratio, releasing ROS and TCA cycle metabolites, and placing immune regulatory proteins on the outer mitochondrial membrane.

    “Mitochondria have multiple mechanisms that allow them to activate signaling pathways in the cytosol including altering in AMP/ATP ratio, the release of ROS and TCA cycle metabolites, as well as the localization of immune regulatory proteins on the outer mitochondrial membrane.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Tregs have elevated oxidative phosphorylation and decreased glycolytic flux compared with Th17 cells.

    “Tregs have elevated levels of oxidative phosphorylation and decreased glycolytic flux compared to Th17 cells (Michalek et al., 2011).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Michalek et al., 2011 source

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  • May combine two claims.

    Interpretationreasoning

    Metabolism not only sustains immune cell phenotypes but also feeds back to alter signaling and drive those phenotypes.

    “An emerging concept is that metabolism not only sustains diverse immune cell phenotypes as a consequence of alterations in cellular signaling, but metabolism also feeds back and alters signaling to drive immune cell phenotypes.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationnone given

    Mitochondria are required both to maintain and to establish immune cell phenotypes and functions.

    “Mitochondria not only sustain immune cell phenotypes but also are necessary for establishing immune cell phenotype and their function.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Tm cells express less surface CD36 than effector T cells and carry out de novo lipogenesis, storing lipids in lysosomes.

    “Tm cells display reduced surface expression of CD36, necessary for fatty acid uptake, compared with Te cells and engage in de novo lipogenesis and store lipids in lysosomes (O'Sullivan et al., 2014).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites O'Sullivan et al., 2014

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    Premisecitation

    BCR ligation causes calcium release into the cytoplasm, promoting ROS production and inactivation of receptor-coupled phosphatases, which allows downstream signaling pathways to activate.

    “Specifically, BCR ligation stimulates calcium release into the cytoplasm that promotes ROS production and inactivation of receptor-coupled phosphates, allowing for activation of downstream signaling pathways.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Singh et al., 2005 source

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    Premisecitation

    The size of the ROS pulse determines how long BCR signaling lasts and how strongly downstream pathways are activated.

    “Depending on the magnitude of the ROS pulse, there is increased duration of BCR signaling and enhanced activation of downstream signaling pathways (Singh et al., 2005).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Singh et al., 2005 source

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  • May combine two claims.

    Premisecitation

    Reducing or increasing AMPK, a positive regulator of fatty acid oxidation, respectively decreases or increases memory T cell formation.

    “The importance of fatty acid oxidation for Tm cells is bolstered by the observations that diminishing or enhancing AMPK, a positive regulator of fatty acid oxidation, decreases or increases formation of memory T cells (MacIver et al., 2011; Pearce et al., 2009; Rolf et al., 2013; Tamás et al., 2010).”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites MacIver et al., 2011 source

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    • cites Pearce et al., 2009 source

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    • cites Rolf et al., 2013 source

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  • May combine two claims.

    Interpretationreasoning

    Tm cells appear to run a futile cycle in which fatty acid synthesis and oxidation occur simultaneously, and this cycle is needed to maintain memory T cells.

    “Thus, Tm cells appear to utilize a “futile cycle” whereby fatty acid synthesis occurs concurrently with fatty acid oxidation, which is required for proper maintenance of memory T cells.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Fatty acid oxidation yields nearly three times as much ATP as mitochondrial glucose oxidation.
    • Rests on an assumption: Memory T cells are not rapidly proliferating, have low anabolic needs, and catabolize nutrients to ATP for long-term survival.
  • May combine two claims.

    Interpretationnone given

    In immune cells, mitochondria contribute to signaling by producing ROS, by making metabolites available, and by serving as physical scaffolds for protein interactions.

    “We outline that in immune cells, mitochondria participate in signaling through ROS production, metabolite availability, and by physically acting as scaffolding for protein interaction.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationcitation

    These studies indicate that mitochondrial metabolism changes during B cell activation and plasma cell development.

    “Although the evidence is incomplete, these new studies indicate that mitochondrial metabolism is altered during B cell activation and plasma cell development.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: B cells undergo major metabolic transitions as they move from naïve quiescent cells to anabolic proliferative cells.
  • May combine two claims.

    Premisecitation

    Recent work indicates that signals traveling from the cell surface to the nucleus frequently take detours via metabolic machinery, so metabolism participates in cell fate choices.

    “While decades of study have shown that direct signaling from the cell surface to the nucleus is critical to these cell fate decisions, more recent work has shown that these signaling pathways often include detours that transmit through metabolic machinery to ensure cooperation of metabolism in the cell fate decision (Pearce et al., 2013)”
    Quote in the paperSubstantial claim0 of 1 sources checked
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    Premisecitation

    Increasing or decreasing glycolytic flux, which reciprocally modulates mitochondrial metabolism, respectively enhances or diminishes memory T cell generation.

    “Further evidence supporting the importance of mitochondrial metabolism comes from the observation that increasing or decreasing glycolytic flux, which reciprocally modulates mitochondrial metabolism, results in enhanced or diminished generation of memory T cells, respectively (Sukumar et al., 2013).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Sukumar et al., 2013 source

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  • The authors state this as an assumption.

    The M1/M2 macrophage classification, though imperfect, is a useful model for studying metabolic differences between macrophages with different functions.

    “Although this classification scheme is imperfect and there almost certainly exists many more macrophage subtypes, it is a useful model for studying how metabolism differs in macrophages with differing functions (Mosser and Edwards, 2008).”
  • The authors state this as an assumption.

    Dendritic cells can be simplified into immunogenic and tolerant subsets for the purpose of discussing their metabolism.

    “As with macrophages, DCs likely exist in numerous different subsets however for simplicity that are classically designated as either an immunogenic or tolerant subset.”
  • The paper relies on this without support.

    Fatty acid oxidation yields nearly three times as much ATP as mitochondrial glucose oxidation.

    “Fatty acid oxidation generates almost 3 times more ATP than glucose oxidation by mitochondria, thus it is robust mechanism to generate ATP.”
  • The paper relies on this without support.

    Memory T cells are not rapidly proliferating, have low anabolic needs, and catabolize nutrients to ATP for long-term survival.

    “Tm cells are not rapidly proliferating and thus do not have high anabolic requirements. They efficiently catabolize nutrients to generate ATP to maintain long-term cell survival.”
  • The paper relies on this without support.

    B cells undergo major metabolic transitions as they move from naïve quiescent cells to anabolic proliferative cells.

    “Similar to T cells, B cells also undergo major transitions in their metabolic profiles as they transition from naïve quiescent cells to anabolic proliferative cells.”
5 of 5

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Cardiolipin, N-formylated peptides, mtDNA, ATP and reactive oxygen species are known mitochondrial damage-associated molecular patterns.

    “Cardiolipin, N-formylated peptides, mtDNA, ATP and reactive oxygen species are known mitochondrial damage-associated molecular patterns (9, 28–30).”

    From Autoantibodies in Systemic Lupus Erythematosus Target Mitochondrial RNA (2019) · cites this paper as [28]

    In the section on mitochondrial signaling and innate immunity (page unavailable), the paper explicitly identifies mtDNA and N-formyl peptides as mitochondrial DAMPs and reports that cardiolipin activates NLRP3. It lists ATP among DAMPs but does not identify it as a mitochondrial DAMP; it describes mitochondrial ROS as an inflammatory signaling factor, not as a DAMP. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Mitochondria and their components, such as N-formylated peptides and mtDNA, are recognized as damage-associated molecular patterns that activate innate immunity and elicit inflammation.

    “Mitochondria and their components (e.g. N-formylated peptides and mtDNA) are recognized as damage-associated molecular patterns (DAMPs), which activate the innate immune system and elicit an inflammatory response6,21–23.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Direction of glycolysis effect on memory T cells is reversed

    Major

    The text says increasing glycolytic flux enhances memory T-cell generation, but the cited study's title says inhibiting glycolytic metabolism enhances CD8+ T-cell memory.

  • Memory T cells are said to contrast with themselves

    Minor

    The sentence compares Tm cells with Tm cells, even though the section distinguishes memory T cells (Tm) from effector T cells (Te). A cell population cannot have a contrasting metabolic profile relative to itself.

2 of 2

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Authors
Weinberg, S. E., Sena, L. A., & Chandel, N. S.
Affiliations
Northwestern University (US)
Corresponding author
Chandel, Navdeep S.
Venue
Immunity
Publisher
Elsevier BV
Published
2015-03
Volume
42
Issue
3
Pages
406-417
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2005853038
Cited by
960
References
124
Citations by year
2026: 76 · 2025: 80 · 2024: 107 · 2023: 91 · 2022: 96 · 2021: 128 · 2020: 105 · 2019: 94 · 2018: 58 · 2017: 59 · 2016: 44 · 2015: 20
FWCI
5.85
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL12206201, P01HL071643, R01HL122062, T32HL076139)
  • National Cancer Institute (R01CA123067, P30CA060553, T32CA009560)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
mitochondria, mitochondrial signaling, innate immunity, adaptive immunity, immune cell metabolism, AMP/ATP ratio, reactive oxygen species, TCA cycle metabolites, mitochondrial outer membrane, immune cell differentiation, cell proliferation and death
MeSH terms
Adenosine Triphosphate, Animals, Citric Acid Cycle, Gene Expression Regulation, Humans, Immunity, Innate, Lymphocytes, Macrophages, Mitochondria, Oxidative Phosphorylation, Signal Transduction, Cytokines, Mitochondrial Proteins, Adaptive Immunity, Inflammasomes

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