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Wittmann N, Bekeschus S, Biedenweg D, Kuthning D, Pohl C, Gramenz J, Otto O, Bossaller L, Meyer-Bahlburg A. Comparative Analysis of Canonical Inflammasome Activation by Flow Cytometry, Imaging Flow Cytometry and High-Content Imaging. Inflammation 2024:10.1007/s10753-024-02141-z. [PMID: 39256305 DOI: 10.1007/s10753-024-02141-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 09/02/2024] [Accepted: 09/04/2024] [Indexed: 09/12/2024]
Abstract
Inflammasome activation occurs in various diseases, including rare diseases that require multicenter studies for investigation. Flow cytometric analysis of ASC speck+ cells in patient samples can be used to detect cell type-specific inflammasome activation. However, this requires standardized sample processing and the ability to compare data from different flow cytometers. To address this issue, we analyzed stimulated and unstimulated PBMCs from healthy donors using seven different flow cytometers. Additionally, human PBMCs were analyzed by fluorescence microscopy, imaging flow cytometry and high-content imaging (HCI). Flow cytometers differed significantly in their ability to detect ASC speck+ cells. Aria III, Astrios EQ, and Canto II performed best in separating ASC speck+ from diffuse ASC cells. Imaging flow cytometry and HCI provided additional insight into ASC speck formation based on image-based parameters. For optimal results, the ability to separate cells with diffuse ASC from ASC speck+ cells is decisive. Image-based parameters can also differentiate cells with diffuse ASC from ASC speck+ cells. For the first time, we analyzed ASC speck detection by HCI in PBMCs and demonstrated advantages of this technique, such as high-throughput, algorithm-driven image quantification and 3D-rendering. Thus, inflammasome activation by ASC speck formation can be detected by various technical methods. However, the results may vary depending on the device used.
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Affiliation(s)
- Nico Wittmann
- Pediatric Rheumatology, Department Pediatric and Adolescent Medicine, University Medicine, University of Greifswald, 17475, Greifswald, Germany
| | - Sander Bekeschus
- ZIK Plasmatis, Leibniz Institute for Plasma Science and Technology (INP Greifswald), Felix-Hausdorff-Straße 2, 17489, Greifswald, Germany
- Clinic and Policlinic for Dermatology and Venerology, Rostock University Medical Center, Strempelstraße 13, 18057, Rostock, Germany
| | - Doreen Biedenweg
- Institute for Physics, University of Greifswald, Greifswald, Germany
| | - Daniela Kuthning
- Pediatric Rheumatology, Department Pediatric and Adolescent Medicine, University Medicine, University of Greifswald, 17475, Greifswald, Germany
| | - Christopher Pohl
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, Greifswald, Germany
| | - Jana Gramenz
- Pediatric Rheumatology, Department Pediatric and Adolescent Medicine, University Medicine, University of Greifswald, 17475, Greifswald, Germany
| | - Oliver Otto
- Institute for Physics, University of Greifswald, Greifswald, Germany
| | - Lukas Bossaller
- Section of Rheumatology, Department of Medicine A, University Medicine, University of Greifswald, Greifswald, Germany
| | - Almut Meyer-Bahlburg
- Pediatric Rheumatology, Department Pediatric and Adolescent Medicine, University Medicine, University of Greifswald, 17475, Greifswald, Germany.
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Moradi A, Aslani MR, Mirshekari Jahangiri H, Naderi N, Aboutaleb N. Protective effects of 4-methylumbelliferone on myocardial ischemia/reperfusion injury in rats through inhibition of oxidative stress and downregulation of TLR4/NF-κB/NLRP3 signaling pathway. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:5015-5027. [PMID: 38183448 DOI: 10.1007/s00210-023-02934-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 12/26/2023] [Indexed: 01/08/2024]
Abstract
Myocardial ischemia-reperfusion injury (MI/R) has been found to be one of the important risk factors for global cardiac mortality and morbidity. The study was conducted to inquire into the protective effect of 4-methylumbilliferon (4-MU) against MI/R in rats and clarify its potential underlying mechanism. Animals were divided into four groups (n = 15) including sham, MI/R, MI/R + vehicle, and MI/R + 4-MU. MI/R was established in Wistar rats by occluding the left anterior descending (LAD) coronary artery for 30 min. 4-MU (25 mg/kg) was injected intraperitoneally before the induction of reperfusion. Cardiac function, fibrosis, oxidant/antioxidant markers, and inflammatory cytokines were evaluated using echocardiography, ELISA, and Western blot assay. As a result of MI/R induction, a decrease in left ventricular contractile function occurred along with increased cardiac fibrosis and tissue damage. The serum levels of TNF-α, IL-1β, and IL-18 increased, while IL-10 decreased. Oxidant/antioxidant changes were evident with increased MDA levels and decreased GSH, SOD, and CAT in the MI/R group. Furthermore, the protein levels of TLR4, NF-κB, and NLRP3 were significantly increased in the heart tissue of MI/R group. Treatment with 4-MU significantly prevented the reduction of cardiac contractile function and its pathological changes as a result of MI/R by inhibiting the increase of serum inflammatory factors and improving the oxidant/antioxidant balance probably through the TLR4/NF-κB/NLRP3 axis. The results of a current study showed that 4-MU had a potential ability to attenuate the cardiac injury by reducing oxidative stress and inflammation in a TLR4/NF-κB/NLRP3-dependent mechanism.
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Affiliation(s)
- Alireza Moradi
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Aslani
- Lung Diseases Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Hamzeh Mirshekari Jahangiri
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Nasim Naderi
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Nahid Aboutaleb
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran.
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