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Mitochondria are key organelles involved in energy production, functioning as the metabolic hubs of cells. Recent findings emphasize the emerging role of the mitochondrion as a key intracellular signaling platform regulating innate immune and inflammatory responses. Several mitochondrial proteins and mitochondrial reactive oxygen species have emerged as central players orchestrating the innate immune responses to pathogens and damaging ligands. This review explores our current understanding of the roles played by mitochondria in regulation of innate immunity and inflammatory responses. Recent advances in our understanding of the relationship between autophagy, mitochondria, and inflammasome activation are also briefly discussed. A comprehensive understanding of mitochondrial role in toll-like receptor-mediated innate immune responses and NLRP3 inflammasome complex activation, will facilitate development of novel therapeutics to treat various infectious, inflammatory, and autoimmune disorders.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5407986 | PMC |
http://dx.doi.org/10.4110/in.2017.17.2.77 | DOI Listing |
Esophagus
September 2025
Department of Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, Japan.
Background: The cluster of differentiation 47 (CD47)-signal regulatory protein alpha (SIRPα) axis is a key regulator of innate immune surveillance, facilitating the neoplastic evasion of macrophage-mediated phagocytosis. Although this pathway has been implicated in tumor immune escape in multiple malignancies, its clinical and prognostic significance in esophageal squamous cell carcinoma (ESCC) remain to be fully elucidated.
Methods: We retrospectively analyzed 100 patients who underwent esophagectomy for resectable ESCC.
Cell Mol Immunol
September 2025
Department of Gastroenterology, Sir Run Run Shaw Hospital, College of Medicine Zhejiang University, Hangzhou, China.
Anti-tumor necrosis factor (TNF) therapy for inflammatory bowel disease (IBD) is hampered by issues of nonresponse and resistance, highlighting the urgent need for alternative or complementary treatments. Our study revealed significant upregulation of taurine in the intestinal tissues of IBD patients, which was inversely related to the severity of the disease. A key discovery was that TNF directly induced taurine synthesis in intestinal epithelial cells and increased the production of angiogenin, a nuclease that degrades mitochondrial RNA, which is known to amplify inflammatory responses.
View Article and Find Full Text PDFCell Mol Immunol
September 2025
Department of Infectious Diseases, Medical Research Institute, Zhongnan Hospital of Wuhan University; Frontier Science Center for Immunology; Taikang Center for Life and Medical Sciences; State Key Laboratory of Virology; Institute of Hepatobiliary Diseases of Wuhan University, Wuhan, Hubei, 430071,
Upon DNA virus infection, cGAS senses viral DNA and triggers MITA (also called STING)-dependent induction of type I interferons (IFN-Is) and other cytokines/chemokines. IFN-Is further activate STAT1/2 to induce interferon-stimulated genes (ISGs) and the innate antiviral response. How the innate antiviral response is silenced in uninfected cells and efficiently mounts upon viral infection is not fully understood.
View Article and Find Full Text PDFEMBO Rep
September 2025
Max Planck Unit for the Science of Pathogens, Berlin, D-10117, Germany.
The sensing of Gram-negative Extracellular Vesicles (EVs) by the innate immune system has been extensively studied in the past decade. In contrast, recognition of Gram-positive EVs by innate immune cells remains poorly understood. Comparative genome-wide transcriptional analysis in human monocytes uncovered that S.
View Article and Find Full Text PDFHum Reprod
September 2025
Institut National de la Santé et de la Recherche Médicale, Ecole des Hautes Etudes en Santé Publique, Institut de recherche en santé, environnement et travail, Université de Rennes-UMR_S1085, Rennes, France.
Study Question: What is the direct effect of mumps virus (MuV) replication within the human testis on the tissue innate immune responses and testicular cell functions?
Summary Answer: MuV induces an early pro-inflammatory response in the human testis ex vivo and infects both Leydig cells and Sertoli cells, which drastically alters testosterone and inhibin B production.
What Is Known Already: Despite widespread vaccination efforts, orchitis remains a significant complication of MuV infection, especially in young men, which potentially results in infertility in up to 87% of patients with bilateral orchitis. Our understanding of MuV pathogenesis in the human testis has been limited by the lack of relevant animal models, impairing the development of effective treatments.