Academic Journal

Redox-driven mitochondrial DNA stress in hepatocellular carcinoma: innate immune remodelling, tumour immune escape, and immunotherapy implications.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Redox-driven mitochondrial DNA stress in hepatocellular carcinoma: innate immune remodelling, tumour immune escape, and immunotherapy implications.
Συγγραφείς: Chang Z; Central Laboratory, The Affiliated Hospital of Yanbian University, Yanji, China., Liu G; Emergency Department, The Affiliated Hospital of Yanbian University, Yanji, China., Zhang J; Department of Metabolic and Bariatric Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China., Lei H; Central Laboratory, The Affiliated Hospital of Yanbian University, Yanji, China., Quan H; Central Laboratory, The Affiliated Hospital of Yanbian University, Yanji, China., Piao Y; Emergency Department, The Affiliated Hospital of Yanbian University, Yanji, China.
Πηγή: Frontiers in immunology [Front Immunol] 2026 Sep 04; Vol. 17, pp. 1903643. Date of Electronic Publication: 2026 Sep 04 (Print Publication: 2026).
Τύπος έκδοσης: Journal Article; Review
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Frontiers Research Foundation] Country of Publication: Switzerland NLM ID: 101560960 Publication Model: eCollection Cited Medium: Internet ISSN: 1664-3224 (Electronic) Linking ISSN: 16643224 NLM ISO Abbreviation: Front Immunol Subsets: MEDLINE
Imprint Name(s): Original Publication: [Lausanne : Frontiers Research Foundation]
Ιατρικοί όροι (MeSH): DNA, Mitochondrial*/genetics , DNA, Mitochondrial*/immunology , DNA, Mitochondrial*/metabolism , Carcinoma, Hepatocellular*/immunology , Carcinoma, Hepatocellular*/therapy , Carcinoma, Hepatocellular*/metabolism , Carcinoma, Hepatocellular*/genetics , Carcinoma, Hepatocellular*/pathology , Liver Neoplasms*/immunology , Liver Neoplasms*/therapy , Liver Neoplasms*/metabolism , Liver Neoplasms*/genetics , Liver Neoplasms*/pathology , Tumor Escape*/immunology , Immunity, Innate*, Mitochondria/metabolism ; Mitochondria/immunology ; Mitochondria/genetics ; Reactive Oxygen Species/metabolism ; Humans ; Oxidation-Reduction ; Animals ; Immunotherapy ; Oxidative Stress ; cGAS-STING Signaling Pathway ; Toll-Like Receptor 9 ; DNA Damage ; Signal Transduction ; Innate Immunity Recognition
Περίληψη: Hepatocellular carcinoma (HCC) develops in a chronically injured liver where metabolic adaptation, oxidative stress, innate immune signalling, and immune tolerance are already intertwined. Mitochondria connect these processes: they sustain tumour-cell fitness, yet damaged organelles expose mitochondrial DNA (mtDNA) as an intracellular and intercellular danger signal. Persistent reactive oxygen species, altered mitochondrial dynamics, nucleoid instability, and incomplete mitophagy-lysosomal clearance can oxidise, fragment, and displace mtDNA. The resulting material may remain in the cytosol, circulate freely or in protein-associated complexes, or be transferred within extracellular vesicles. These forms are not immunologically equivalent. Cytosolic mtDNA favours cGAS-STING access; endocytosed material can engage endolysosomal TLR9; and oxidised mtDNA can cooperate with mitochondrial reactive oxygen species, ATP, cardiolipin, and ionic perturbation in NLRP3 inflammasome-associated signalling. Redox remodelling also alters interferon responsiveness, inflammasome competence, and myeloid-cell metabolism, allowing recipient cells to assign different meanings to a similar mitochondrial signal. We integrate these mechanisms into an acute immune activation-chronic immune adaptation continuum. Transient, spatially restricted, and efficiently cleared danger can support antigen presentation and effector recruitment, whereas recurrent or poorly cleared signalling can become embedded in suppressive myeloid remodelling, lymphocyte dysfunction, and spatial immune escape. Direct HCC studies support treatment-induced mtDNA-STING activation, hypoxic extracellular-vesicle-mediated mtDNA transfer, macrophage TLR9 signalling, and TFAM-mtDNA-NLRP3 coupling. The transition between immune states remains a testable synthesis, not an established linear pathway. Therapeutic intervention should be matched to signal form, recipient-cell competence, timing, spatial context, and hepatic reserve; pathway activation alone is an inadequate guide.
(Copyright © 2026 Chang, Liu, Zhang, Lei, Quan and Piao.)
Competing Interests: The author(s) declared that this work was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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Contributed Indexing: Keywords: hepatocellular carcinoma; immunotherapy; innate immunity; mitochondrial DNA; mitochondrial danger signals; redox signalling; tumour immune escape; tumour immune microenvironment
Substance Nomenclature: 0 (DNA, Mitochondrial)
0 (Toll-Like Receptor 9)
0 (Reactive Oxygen Species)
Entry Date(s): Date Created: 20260919 Date Completed: 20260919 Latest Revision: 20260921
Update Code: 20260921
PubMed Central ID: PMC13587012
DOI: 10.3389/fimmu.2026.1903643
PMID: 42761405
Βάση Δεδομένων: MEDLINE
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Redox-driven mitochondrial DNA stress in hepatocellular carcinoma: innate immune remodelling, tumour immune escape, and immunotherapy implications.
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  Data: <searchLink fieldCode="AU" term="%22Chang+Z%22">Chang Z</searchLink>; Central Laboratory, The Affiliated Hospital of Yanbian University, Yanji, China.<br /><searchLink fieldCode="AU" term="%22Liu+G%22">Liu G</searchLink>; Emergency Department, The Affiliated Hospital of Yanbian University, Yanji, China.<br /><searchLink fieldCode="AU" term="%22Zhang+J%22">Zhang J</searchLink>; Department of Metabolic and Bariatric Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China.<br /><searchLink fieldCode="AU" term="%22Lei+H%22">Lei H</searchLink>; Central Laboratory, The Affiliated Hospital of Yanbian University, Yanji, China.<br /><searchLink fieldCode="AU" term="%22Quan+H%22">Quan H</searchLink>; Central Laboratory, The Affiliated Hospital of Yanbian University, Yanji, China.<br /><searchLink fieldCode="AU" term="%22Piao+Y%22">Piao Y</searchLink>; Emergency Department, The Affiliated Hospital of Yanbian University, Yanji, China.
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  Data: <searchLink fieldCode="JN" term="%22101560960%22">Frontiers in immunology</searchLink> [Front Immunol] 2026 Sep 04; Vol. 17, pp. 1903643. <i>Date of Electronic Publication: </i>2026 Sep 04 (<i>Print Publication: </i>2026).
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  Data: <i>Publisher: </i><searchLink fieldCode="PB" term="%22Frontiers+Research+Foundation]%22">Frontiers Research Foundation] </searchLink><i>Country of Publication: </i>Switzerland <i>NLM ID: </i>101560960 <i>Publication Model: </i>eCollection <i>Cited Medium: </i>Internet <i>ISSN: </i>1664-3224 (Electronic) <i>Linking ISSN: </i><searchLink fieldCode="IS" term="%2216643224%22">16643224 </searchLink><i>NLM ISO Abbreviation: </i>Front Immunol <i>Subsets: </i>MEDLINE
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  Data: <i>Original Publication</i>: [Lausanne : Frontiers Research Foundation]
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  Data: <searchLink fieldCode="MM" term="%22DNA%2C+Mitochondrial%22">DNA, Mitochondrial*</searchLink>/<searchLink fieldCode="MM" term="%22DNA%2C+Mitochondrial+genetics%22">genetics</searchLink> <br /><searchLink fieldCode="MM" term="%22DNA%2C+Mitochondrial%22">DNA, Mitochondrial*</searchLink>/<searchLink fieldCode="MM" term="%22DNA%2C+Mitochondrial+immunology%22">immunology</searchLink> <br /><searchLink fieldCode="MM" term="%22DNA%2C+Mitochondrial%22">DNA, Mitochondrial*</searchLink>/<searchLink fieldCode="MM" term="%22DNA%2C+Mitochondrial+metabolism%22">metabolism</searchLink> <br /><searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular%22">Carcinoma, Hepatocellular*</searchLink>/<searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular+immunology%22">immunology</searchLink> <br /><searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular%22">Carcinoma, Hepatocellular*</searchLink>/<searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular+therapy%22">therapy</searchLink> <br /><searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular%22">Carcinoma, Hepatocellular*</searchLink>/<searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular+metabolism%22">metabolism</searchLink> <br /><searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular%22">Carcinoma, Hepatocellular*</searchLink>/<searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular+genetics%22">genetics</searchLink> <br /><searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular%22">Carcinoma, Hepatocellular*</searchLink>/<searchLink fieldCode="MM" term="%22Carcinoma%2C+Hepatocellular+pathology%22">pathology</searchLink> <br /><searchLink fieldCode="MM" term="%22Liver+Neoplasms%22">Liver Neoplasms*</searchLink>/<searchLink fieldCode="MM" term="%22Liver+Neoplasms+immunology%22">immunology</searchLink> <br /><searchLink fieldCode="MM" term="%22Liver+Neoplasms%22">Liver Neoplasms*</searchLink>/<searchLink fieldCode="MM" term="%22Liver+Neoplasms+therapy%22">therapy</searchLink> <br /><searchLink fieldCode="MM" term="%22Liver+Neoplasms%22">Liver Neoplasms*</searchLink>/<searchLink fieldCode="MM" term="%22Liver+Neoplasms+metabolism%22">metabolism</searchLink> <br /><searchLink fieldCode="MM" term="%22Liver+Neoplasms%22">Liver Neoplasms*</searchLink>/<searchLink fieldCode="MM" term="%22Liver+Neoplasms+genetics%22">genetics</searchLink> <br /><searchLink fieldCode="MM" term="%22Liver+Neoplasms%22">Liver Neoplasms*</searchLink>/<searchLink fieldCode="MM" term="%22Liver+Neoplasms+pathology%22">pathology</searchLink> <br /><searchLink fieldCode="MM" term="%22Tumor+Escape%22">Tumor Escape*</searchLink>/<searchLink fieldCode="MM" term="%22Tumor+Escape+immunology%22">immunology</searchLink> <br /><searchLink fieldCode="MM" term="%22Immunity%2C+Innate%22">Immunity, Innate*</searchLink><br /><searchLink fieldCode="MH" term="%22Mitochondria%22">Mitochondria</searchLink>/<searchLink fieldCode="MH" term="%22Mitochondria+metabolism%22">metabolism</searchLink> ; <searchLink fieldCode="MH" term="%22Mitochondria%22">Mitochondria</searchLink>/<searchLink fieldCode="MH" term="%22Mitochondria+immunology%22">immunology</searchLink> ; <searchLink fieldCode="MH" term="%22Mitochondria%22">Mitochondria</searchLink>/<searchLink fieldCode="MH" term="%22Mitochondria+genetics%22">genetics</searchLink> ; <searchLink fieldCode="MH" term="%22Reactive+Oxygen+Species%22">Reactive Oxygen Species</searchLink>/<searchLink fieldCode="MH" term="%22Reactive+Oxygen+Species+metabolism%22">metabolism</searchLink> ; <searchLink fieldCode="MH" term="%22Humans%22">Humans</searchLink> ; <searchLink fieldCode="MH" term="%22Oxidation-Reduction%22">Oxidation-Reduction</searchLink> ; <searchLink fieldCode="MH" term="%22Animals%22">Animals</searchLink> ; <searchLink fieldCode="MH" term="%22Immunotherapy%22">Immunotherapy</searchLink> ; <searchLink fieldCode="MH" term="%22Oxidative+Stress%22">Oxidative Stress</searchLink> ; <searchLink fieldCode="MH" term="%22cGAS-STING+Signaling+Pathway%22">cGAS-STING Signaling Pathway</searchLink> ; <searchLink fieldCode="MH" term="%22Toll-Like+Receptor+9%22">Toll-Like Receptor 9</searchLink> ; <searchLink fieldCode="MH" term="%22DNA+Damage%22">DNA Damage</searchLink> ; <searchLink fieldCode="MH" term="%22Signal+Transduction%22">Signal Transduction</searchLink> ; <searchLink fieldCode="MH" term="%22Innate+Immunity+Recognition%22">Innate Immunity Recognition</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Hepatocellular carcinoma (HCC) develops in a chronically injured liver where metabolic adaptation, oxidative stress, innate immune signalling, and immune tolerance are already intertwined. Mitochondria connect these processes: they sustain tumour-cell fitness, yet damaged organelles expose mitochondrial DNA (mtDNA) as an intracellular and intercellular danger signal. Persistent reactive oxygen species, altered mitochondrial dynamics, nucleoid instability, and incomplete mitophagy-lysosomal clearance can oxidise, fragment, and displace mtDNA. The resulting material may remain in the cytosol, circulate freely or in protein-associated complexes, or be transferred within extracellular vesicles. These forms are not immunologically equivalent. Cytosolic mtDNA favours cGAS-STING access; endocytosed material can engage endolysosomal TLR9; and oxidised mtDNA can cooperate with mitochondrial reactive oxygen species, ATP, cardiolipin, and ionic perturbation in NLRP3 inflammasome-associated signalling. Redox remodelling also alters interferon responsiveness, inflammasome competence, and myeloid-cell metabolism, allowing recipient cells to assign different meanings to a similar mitochondrial signal. We integrate these mechanisms into an acute immune activation-chronic immune adaptation continuum. Transient, spatially restricted, and efficiently cleared danger can support antigen presentation and effector recruitment, whereas recurrent or poorly cleared signalling can become embedded in suppressive myeloid remodelling, lymphocyte dysfunction, and spatial immune escape. Direct HCC studies support treatment-induced mtDNA-STING activation, hypoxic extracellular-vesicle-mediated mtDNA transfer, macrophage TLR9 signalling, and TFAM-mtDNA-NLRP3 coupling. The transition between immune states remains a testable synthesis, not an established linear pathway. Therapeutic intervention should be matched to signal form, recipient-cell competence, timing, spatial context, and hepatic reserve; pathway activation alone is an inadequate guide.<br /> (Copyright © 2026 Chang, Liu, Zhang, Lei, Quan and Piao.)
– Name: Abstract
  Label: Competing Interests
  Group: Ab
  Data: The author(s) declared that this work was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
– Name: Ref
  Label: References
  Group: RefInfo
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(PMID: <searchLink fieldCode="PM" term="%2241360802%22">41360802)</searchLink><br />Nat Rev Clin Oncol. 2019 Jul;16(7):425-441. (PMID: <searchLink fieldCode="PM" term="%2230914826%22">30914826)</searchLink><br />J Exp Clin Cancer Res. 2026 Jan 09;45(1):42. (PMID: <searchLink fieldCode="PM" term="%2241508119%22">41508119)</searchLink><br />Nat Commun. 2021 Jun 17;12(1):3684. (PMID: <searchLink fieldCode="PM" term="%2234140495%22">34140495)</searchLink><br />NPJ Precis Oncol. 2024 Mar 23;8(1):75. (PMID: <searchLink fieldCode="PM" term="%2238521868%22">38521868)</searchLink><br />Science. 2018 May 25;360(6391):. (PMID: <searchLink fieldCode="PM" term="%2229798856%22">29798856)</searchLink><br />J Hepatol. 2022 Sep;77(3):748-760. (PMID: <searchLink fieldCode="PM" term="%2235378172%22">35378172)</searchLink><br />JCI Insight. 2017 Feb 9;2(3):e89160. (PMID: <searchLink fieldCode="PM" term="%2228194435%22">28194435)</searchLink><br />Pharmacol Res. 2025 Jun;216:107764. 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  Data: <i>Keywords: </i>hepatocellular carcinoma; immunotherapy; innate immunity; mitochondrial DNA; mitochondrial danger signals; redox signalling; tumour immune escape; tumour immune microenvironment
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  Data: <i>Date Created: </i>20260919 <i>Date Completed: </i>20260919 <i>Latest Revision: </i>20260921
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        Value: 10.3389/fimmu.2026.1903643
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        Text: English
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    Subjects:
      – SubjectFull: Mitochondria metabolism
        Type: general
      – SubjectFull: Mitochondria immunology
        Type: general
      – SubjectFull: Mitochondria genetics
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      – SubjectFull: Reactive Oxygen Species metabolism
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      – SubjectFull: Humans
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      – SubjectFull: Oxidation-Reduction
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      – SubjectFull: Animals
        Type: general
      – SubjectFull: Immunotherapy
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      – SubjectFull: Toll-Like Receptor 9
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      – SubjectFull: DNA Damage
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      – SubjectFull: Signal Transduction
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      – SubjectFull: Innate Immunity Recognition
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      – SubjectFull: DNA, Mitochondrial genetics
        Type: general
      – SubjectFull: DNA, Mitochondrial immunology
        Type: general
      – SubjectFull: DNA, Mitochondrial metabolism
        Type: general
      – SubjectFull: Carcinoma, Hepatocellular immunology
        Type: general
      – SubjectFull: Carcinoma, Hepatocellular therapy
        Type: general
      – SubjectFull: Carcinoma, Hepatocellular metabolism
        Type: general
      – SubjectFull: Carcinoma, Hepatocellular genetics
        Type: general
      – SubjectFull: Carcinoma, Hepatocellular pathology
        Type: general
      – SubjectFull: Liver Neoplasms immunology
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      – SubjectFull: Liver Neoplasms genetics
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      – SubjectFull: Tumor Escape immunology
        Type: general
      – SubjectFull: Immunity, Innate
        Type: general
    Titles:
      – TitleFull: Redox-driven mitochondrial DNA stress in hepatocellular carcinoma: innate immune remodelling, tumour immune escape, and immunotherapy implications.
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            – D: 04
              M: 09
              Text: 2026 Sep 04
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-electronic
              Value: 1664-3224
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              Value: 17
          Titles:
            – TitleFull: Frontiers in immunology
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