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The NLRP3-Inflammasome in Health and Disease 2.0

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Immunology".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 2419

Special Issue Editor

Department of Experimental and Clinical Medicine, University “Magna Graecia” Catanzaro, 88100 Catanzaro, Italy
Interests: cancer endocrinology; molecular biology; signal transduction; p75NTR-signaling; apoptosis; autophagy; EMT; renal and peritoneal fibrosis; inflammation; biological activity of natural compounds in cancer and chronic diseases
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Special Issue Information

Dear Colleagues,

NLRP3 inflammasome is a key component of the innate immune system, which is activated by a wide range of pathogen-, host-, and environment-derived molecules. NLRP3 inflammasome activation occurs through a canonical and non-canonical pathway. In this, the culminant event is the production of active caspase-1, which is able to process pro-IL-1β into its mature protein, IL-1β, that, in turn, is considered a crucial mediator of inflammation. However, the physiological role of NLRP3 in healthy individuals remains incompletely understood.

In the last decades, many in vitro and in vivo studies have demonstrated that the aberrant NLRP3 activation is strongly involved in the pathogenesis of prevalent diseases, including inflammatory bowel disease, coronary heart disease, chronic kidney disease, autoimmune diseases, neurodegenerative diseases, and cancer. Furthermore, genetic studies uncovered mutations or genetic variants in NLRP3 inflammasome components, conferring the susceptibility for diseases, such as diabetes and systemic inflammation. Recently, it has been proposed that dysregulated epigenetic mechanisms may contribute to the clinical manifestations of autoinflammatory syndromes by upregulating the expression of inflammasome components.

Therefore, it is our pleasure to invite investigators to contribute to this Special Issue with original research articles, aimed to better elucidate the current knowledge of the physiological and pathophysiological mechanisms of NLRP3 inflammasome activation in health and diseases and to propose new therapeutic approaches targeting the NLRP3 inflammasome.

Dr. Anna Perri
Guest Editor

Manuscript Submission Information

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Keywords

  • NLRP3-inflammasome
  • mitochondrial dysfunction
  • oxidative stress
  • IL-1β – IL-18
  • genetic variants of NLRP3 inflammasome

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Published Papers (2 papers)

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Research

30 pages, 5173 KiB  
Article
Prdx6 Regulates Nlrp3 Inflammasome Activation-Driven Inflammatory Response in Lens Epithelial Cells
by Bhavana Chhunchha, Rakesh Kumar, Eri Kubo, Priyanka Thakur and Dhirendra P. Singh
Int. J. Mol. Sci. 2023, 24(22), 16276; https://doi.org/10.3390/ijms242216276 - 13 Nov 2023
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Abstract
The continuum of antioxidant response dysregulation in aging/oxidative stress-driven Nlrp3 inflammasome activation-mediated inflammatory response is associated with age-related diseases. Peroxiredoxin (Prdx) 6 is a key antioxidant that provides cytoprotection by regulating redox homeostasis. Herein, using lens epithelial cells (LECs) derived from the targeted [...] Read more.
The continuum of antioxidant response dysregulation in aging/oxidative stress-driven Nlrp3 inflammasome activation-mediated inflammatory response is associated with age-related diseases. Peroxiredoxin (Prdx) 6 is a key antioxidant that provides cytoprotection by regulating redox homeostasis. Herein, using lens epithelial cells (LECs) derived from the targeted inactivation of Prdx6 gene and aging lenses, we present molecular evidence that Prdx6-deficiency causes oxidative-driven Nlrp3 inflammasome activation, resulting in pyroptosis in aging/redox active cells wherein Prdx6 availability offsets the inflammatory process. We observed that Prdx6−/− and aging LECs harboring accumulated reactive oxygen species (ROS) showed augmented activation of Nlrp3 and bioactive inflammatory components, like Caspase-1, IL-1β, ASC and Gasdermin-D. Similar to lipopolysaccharide treatment, oxidative exposure led to further ROS amplification with increased activation of the Nlrp3 inflammasome pathway. Mechanistically, we found that oxidative stress enhanced Kruppel-like factor 9 (Klf9) expression in aging/Prdx6−/− mLECs, leading to a Klf9-dependent increase in Nlrp3 transcription, while the elimination of ROS by the delivery of Prdx6 or by silencing Klf9 prevented the inflammatory response. Altogether, our data identify the biological significance of Prdx6 as an intrinsic checkpoint for regulating the cellular health of aging or redox active LECs and provide opportunities to develop antioxidant-based therapeutic(s) to prevent oxidative/aging-related diseases linked to aberrant Nlrp3 inflammasome activation. Full article
(This article belongs to the Special Issue The NLRP3-Inflammasome in Health and Disease 2.0)
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15 pages, 1248 KiB  
Article
Acute Glycemic Control in Prediabetes Individuals Favorably Alters Serum NLRP3 Inflammasome and Related Interleukins
by Hend Alfadul, Shaun Sabico, Abdullah M. Alnaami, Osama E. Amer, Syed D. Hussain, Kaiser Wani, Mario Clerici and Nasser M. Al-Daghri
Int. J. Mol. Sci. 2023, 24(18), 13837; https://doi.org/10.3390/ijms241813837 - 08 Sep 2023
Cited by 1 | Viewed by 922
Abstract
Hyperglycemia associated with prediabetes (PD) alters NLRP3 inflammasome activity and related interleukins, yet no study has evaluated the expression of the NLRP3 inflammasome complex and related interleukins in individuals with a PD condition that did or did not develop type 2 diabetes mellitus [...] Read more.
Hyperglycemia associated with prediabetes (PD) alters NLRP3 inflammasome activity and related interleukins, yet no study has evaluated the expression of the NLRP3 inflammasome complex and related interleukins in individuals with a PD condition that did or did not develop type 2 diabetes mellitus (T2DM). This study investigated the effect of 6 months of lifestyle modification on the expression of the NLRP3 inflammasome and related interleukins (1α, 1β, 18, 33 and 37) in the sera of individuals with a PD condition that did or did not develop T2DM. This interventional study included 67 Saudi adults (mean age = 41.9 ± 8.0 years, mean BMI = 33.2 ± 5.5 kg/m2). Overnight-fasting serum samples were collected at baseline and at the 6-month follow-up. Serum levels of NLRP3, capsase-1 and related ILs were analyzed at both visits using commercially available immunoassay kits. Results showed that IL-1α increased in the PD group that developed T2DM (p = 0.046), IL-33 decreased in the PD group that reverted to normal (p < 0.001) and NLRP3 decreased in the PD group that remained PD (p = 0.01). Results also showed a positive over-time correlation between NLRP3 and both IL-1α and IL-33 (p < 0.001 and p = 0.028, respectively). In conclusion, glycemic control favorably altered NLRP3 inflammasome complex activity, and lifestyle modification in PD individuals is crucial in reversing harmful metabolic and inflammatory phenotypes. Full article
(This article belongs to the Special Issue The NLRP3-Inflammasome in Health and Disease 2.0)
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