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Liang F, Huang S. PGC-1α inhibits NLRP3 signaling through transcriptional activation of POP1 to alleviate inflammation and strengthen osteogenic differentiation of lipopolysaccharide-induced human periodontal stem cells. Prostaglandins Other Lipid Mediat 2024; 174:106853. [PMID: 38763227 DOI: 10.1016/j.prostaglandins.2024.106853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/21/2024]
Abstract
Periodontitis is a chronic infectious disease that affects the oral health of adults. Periodontal stem cells (PDLSCs) have good self-renewal and multipotential differentiation abilities to maintain the integrity of periodontal support structure and repair defects. This study aimed to elucidate the role of peroxisome proliferator activated receptor-γ co-activator 1-α (PGC-1α) in lipopolysaccharide (LPS)-induced PDLSCs and the underlying mechanisms related to predicated that pyrin domain (PYD)-only protein 1 (POP1). Notably downregulated PGC-1α and POP1 expression was observed in LPS-induced PDLSCs. PGC-1α or POP1 overexpression significantly reduced the inflammation and enhanced the osteogenic differentiation of LPS-treated PDLSCs. Particularly, PGC-1 bound to POP1 promoter region and upregulated POP1 expression. Moreover, POP1 knockdown ameliorated the impacts of PGC-1α overexpression on the inflammation and osteogenic differentiation in LPS-induced PDLSCs. Besides, PGC-1α inactivated NLRP3 signaling in LPS-treated PDLSCs, which was reversed by POP1 knockdown. Taken together, PGC-1α inhibits NLRP3 signaling through transcriptional activation of POP1, thereby alleviating inflammation and strengthening osteogenic differentiation of LPS-induced PDLSCs.
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Affiliation(s)
- Fuying Liang
- Department of Stomatology, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong 518100, China
| | - Shanshan Huang
- Department of Dentistry and Endodontics, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan 65000, China.
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Peng J, Gu Y, Liu J, Yi H, Ruan D, Huang H, Shu Y, Zong Z, Wu R, Li H. Identification of SOCS3 and PTGS2 as new biomarkers for the diagnosis of gout by cross-species comprehensive analysis. Heliyon 2024; 10:e30020. [PMID: 38707281 PMCID: PMC11066387 DOI: 10.1016/j.heliyon.2024.e30020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 04/18/2024] [Accepted: 04/18/2024] [Indexed: 05/07/2024] Open
Abstract
Background Gout is the most common inflammatory arthritis in adults. Gout is an arthritic disease caused by the deposition of monosodium urate crystal (MSU) in the joints, which can lead to acute inflammation and damage adjacent tissue. Hyperuricemia is the main risk factor for MSU crystal deposition and gout. With the increasing burden of gout disease, the identification of potential biomarkers and novel targets for diagnosis is urgently needed. Methods For the analysis of this subject paper, we downloaded the human gout data set GSE160170 and the gout mouse model data set GSE190138 from the GEO database. To obtain the differentially expressed genes (DEGs), we intersected the two data sets. Using the cytohubba algorithm, we identified the key genes and enriched them through GO and KEGG. The gene expression trends of three subgroups (normal control group, intermittent gout group and acute gout attack group) were analyzed by Series Test of Cluster (STC) analysis, and the key genes were screened out, and the diagnostic effect was verified by ROC curve. The expression of key genes in dorsal root nerve and spinal cord of gout mice was analyzed. Finally, the clinical samples of normal control group, hyperuricemia group, intermittent gout group and acute gout attack group were collected, and the expression of key genes at protein level was verified by ELISA. Result We obtained 59 co-upregulated and 28 co-downregulated genes by comparing the DEGs between gout mouse model data set and human gout data set. 7 hub DEGs(IL1B, IL10, NLRP3, SOCS3, PTGS2) were screened out via Cytohubba algorithm. The results of both GO and KEGG enrichment analyses indicate that 7 hub genes play a significant role in regulating the inflammatory response, cytokine production in immune response, and the TNF signaling pathway. The most representative hub genes SOCS3 and PTGS2 were screened out by Series Test of Cluster, and ROC analysis results showed the AUC values were both up to 1.000. In addition, we found that PTGS2 expression was significantly elevated in the dorsal root ganglia and spinal cord in monosodium urate(MSU)-induced gout mouse model. The ELISA results revealed that the expression of SOCS3 and PTGS2 was notably higher in the acute gout attack and intermittent gout groups compared to the normal control group. This difference was statistically significant, indicating a clear distinction between the groups. Conclusion Through cross-species comprehensive analysis and experimental verification, SOCS3 and PTGS2 were proved to be new biomarkers for diagnosing gout and predicting disease progression.
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Affiliation(s)
- Jie Peng
- Department of Rheumatology and Immunology, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
- The Second Clinical Medical College, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
- Department of Sports Medicine, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Yawen Gu
- Department of Rheumatology and Immunology, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
- The Second Clinical Medical College, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
| | - Jiang Liu
- Department of Gastrointestinal Surgery, the Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, 1 MinDe Road, 330006, Nanchang, China
| | - Hao Yi
- Department of Gastrointestinal Surgery, the Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, 1 MinDe Road, 330006, Nanchang, China
| | - Dong Ruan
- Department of Rheumatology and Immunology, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
- The Second Clinical Medical College, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
- Department of Rehabilitation Medicine, the Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, 1 Minde Road, 330006, Nanchang, China
| | - Haoyu Huang
- Department of Gastrointestinal Surgery, the Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, 1 MinDe Road, 330006, Nanchang, China
| | - Yuan Shu
- The Second Clinical Medical College, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
| | - Zhen Zong
- Department of Gastrointestinal Surgery, the Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, 1 MinDe Road, 330006, Nanchang, China
| | - Rui Wu
- Department of Rheumatology and Immunology, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
| | - Hui Li
- Department of Rheumatology and Immunology, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, 330006, Nanchang, China
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Devi S, Stehlik C, Dorfleutner A. Protocol to create a murine subcutaneous air pouch for the study of monosodium urate crystal-induced gout. STAR Protoc 2024; 5:102888. [PMID: 38358882 PMCID: PMC10876590 DOI: 10.1016/j.xpro.2024.102888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/04/2024] [Accepted: 01/29/2024] [Indexed: 02/17/2024] Open
Abstract
Monosodium urate (MSU) crystal deposition in articular joints and bursal tissue causes acute joint inflammation, which is a hallmark of gout. Here, we describe the steps necessary to create a subcutaneous air pouch on the back of mice that resembles this bursa-like space with a synovial lining-like membrane. We then detail the injection of MSU crystals into this pouch, which induces a localized inflammatory response reminiscent of gout and approaches to quantify the inflammatory response. For complete details on the use and execution of this protocol, please refer to Devi et al. (2023),1 de Almeida et al. (2022),2 and Ratsimandresy et al. (2017).3.
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Affiliation(s)
- Savita Devi
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Christian Stehlik
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedar Sinai Medical Center, Los Angeles, CA 90048, USA; The Kao Autoimmunity Institute, Cedar Sinai Medical Center, Los Angeles, CA 90048, USA; Samuel Oschin Comprehensive Cancer Institute, Cedar Sinai Medical Center, Los Angeles, CA 90048, USA.
| | - Andrea Dorfleutner
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedar Sinai Medical Center, Los Angeles, CA 90048, USA; The Kao Autoimmunity Institute, Cedar Sinai Medical Center, Los Angeles, CA 90048, USA.
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Wu S, Garg A, Mazanek Z, Belotte G, Zhou JJ, Stallings CM, Lueck J, Roland A, Chattergoon MA, Sohn J. Design principles for inflammasome inhibition by pyrin-only-proteins. eLife 2024; 13:e81918. [PMID: 38252125 PMCID: PMC10803020 DOI: 10.7554/elife.81918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 01/02/2024] [Indexed: 01/23/2024] Open
Abstract
Inflammasomes are filamentous signaling platforms essential for host defense against various intracellular calamities such as pathogen invasion and genotoxic stresses. However, dysregulated inflammasomes cause an array of human diseases including autoinflammatory disorders and cancer. It was recently identified that endogenous pyrin-only-proteins (POPs) regulate inflammasomes by directly inhibiting their filament assembly. Here, by combining Rosetta in silico, in vitro, and in cellulo methods, we investigate the target specificity and inhibition mechanisms of POPs. We find here that POP1 is ineffective in directly inhibiting the central inflammasome adaptor ASC. Instead, POP1 acts as a decoy and targets the assembly of upstream receptor pyrin-domain (PYD) filaments such as those of AIM2, IFI16, NLRP3, and NLRP6. Moreover, not only does POP2 directly suppress the nucleation of ASC, but it can also inhibit the elongation of receptor filaments. In addition to inhibiting the elongation of AIM2 and NLRP6 filaments, POP3 potently suppresses the nucleation of ASC. Our Rosetta analyses and biochemical experiments consistently suggest that a combination of favorable and unfavorable interactions between POPs and PYDs is necessary for effective recognition and inhibition. Together, we reveal the intrinsic target redundancy of POPs and their inhibitory mechanisms.
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Affiliation(s)
- Shuai Wu
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Archit Garg
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Zachary Mazanek
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Gretchen Belotte
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Jeffery J Zhou
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Christina M Stallings
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Jacob Lueck
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Aubrey Roland
- Division of Infectious Diseases, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Michael A Chattergoon
- Division of Infectious Diseases, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Jungsan Sohn
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of MedicineBaltimoreUnited States
- Division of Rheumatology, Johns Hopkins University School of MedicineBaltimoreUnited States
- Department of Oncology, Johns Hopkins University School of MedicineBaltimoreUnited States
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Kim ME, Lee JS. Molecular Foundations of Inflammatory Diseases: Insights into Inflammation and Inflammasomes. Curr Issues Mol Biol 2024; 46:469-484. [PMID: 38248332 PMCID: PMC10813887 DOI: 10.3390/cimb46010030] [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: 11/25/2023] [Revised: 12/25/2023] [Accepted: 12/28/2023] [Indexed: 01/23/2024] Open
Abstract
Inflammatory diseases are a global health problem affecting millions of people with a wide range of conditions. These diseases, including inflammatory bowel disease (IBD), rheumatoid arthritis (RA), osteoarthritis (OA), gout, and diabetes, impose a significant burden on patients and healthcare systems. A complicated interaction between genetic variables, environmental stimuli, and dysregulated immune responses shows the complex biological foundation of various diseases. This review focuses on the molecular mechanisms underlying inflammatory diseases, including the function of inflammasomes and inflammation. We investigate the impact of environmental and genetic factors on the progression of inflammatory diseases, explore the connection between inflammation and inflammasome activation, and examine the incidence of various inflammatory diseases in relation to inflammasomes.
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Affiliation(s)
| | - Jun Sik Lee
- Department of Biological Science, Immunology Research Lab & BK21-Four Educational Research Group for Age-Associated Disorder Control Technology, Chosun University, Gwangju 61452, Republic of Korea;
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Devi S, Indramohan M, Jäger E, Carriere J, Chu LH, de Almeida L, Greaves DR, Stehlik C, Dorfleutner A. CARD-only proteins regulate in vivo inflammasome responses and ameliorate gout. Cell Rep 2023; 42:112265. [PMID: 36930645 PMCID: PMC10151391 DOI: 10.1016/j.celrep.2023.112265] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 01/10/2023] [Accepted: 02/28/2023] [Indexed: 03/18/2023] Open
Abstract
Inflammatory responses are crucial for controlling infections and initiating tissue repair. However, excessive and uncontrolled inflammation causes inflammatory disease. Processing and release of the pro-inflammatory cytokines interleukin-1β (IL-1β) and IL-18 depend on caspase-1 activation within inflammasomes. Assembly of inflammasomes is initiated upon activation of cytosolic pattern recognition receptors (PRRs), followed by sequential polymerization of pyrin domain (PYD)-containing and caspase recruitment domain (CARD)-containing proteins mediated by homotypic PYD and CARD interactions. Small PYD- or CARD-only proteins (POPs and COPs, respectively) evolved in higher primates to target these crucial interactions to limit inflammation. Here, we show the ability of COPs to regulate inflammasome activation by modulating homotypic CARD-CARD interactions in vitro and in vivo. CARD16, CARD17, and CARD18 displace crucial CARD interactions between caspase-1 proteins through competitive binding and ameliorate uric acid crystal-mediated NLRP3 inflammasome activation and inflammatory disease. COPs therefore represent an important family of inflammasome regulators and ameliorate inflammatory disease.
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Affiliation(s)
- Savita Devi
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Mohanalaxmi Indramohan
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Elisabeth Jäger
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Jessica Carriere
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Lan H Chu
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Driskill Graduate Program in Life Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Lucia de Almeida
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - David R Greaves
- Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK
| | - Christian Stehlik
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; Samuel Oschin Comprehensive Cancer Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; The Kao Autoimmunity Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA.
| | - Andrea Dorfleutner
- Department of Academic Pathology, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA; The Kao Autoimmunity Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA.
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7
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Li Y, Jiang Q. Uncoupled pyroptosis and IL-1β secretion downstream of inflammasome signaling. Front Immunol 2023; 14:1128358. [PMID: 37090724 PMCID: PMC10117957 DOI: 10.3389/fimmu.2023.1128358] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/24/2023] [Indexed: 04/25/2023] Open
Abstract
Inflammasomes are supramolecular platforms that organize in response to various damage-associated molecular patterns and pathogen-associated molecular patterns. Upon activation, inflammasome sensors (with or without the help of ASC) activate caspase-1 and other inflammatory caspases that cleave gasdermin D and pro-IL-1β/pro-IL-18, leading to pyroptosis and mature cytokine secretion. Pyroptosis enables intracellular pathogen niche disruption and intracellular content release at the cost of cell death, inducing pro-inflammatory responses in the neighboring cells. IL-1β is a potent pro-inflammatory regulator for neutrophil recruitment, macrophage activation, and T-cell expansion. Thus, pyroptosis and cytokine secretion are the two main mechanisms that occur downstream of inflammasome signaling; they maintain homeostasis, drive the innate immune response, and shape adaptive immunity. This review aims to discuss the possible mechanisms, timing, consequences, and significance of the two uncoupling preferences downstream of inflammasome signaling. While pyroptosis and cytokine secretion may be usually coupled, pyroptosis-predominant and cytokine-predominant uncoupling are also observed in a stimulus-, cell type-, or context-dependent manner, contributing to the pathogenesis and development of numerous pathological conditions such as cryopyrin-associated periodic syndromes, LPS-induced sepsis, and Salmonella enterica serovar Typhimurium infection. Hyperactive cells consistently release IL-1β without LDH leakage and pyroptotic death, thereby leading to prolonged inflammation, expanding the lifespans of pyroptosis-resistant neutrophils, and hyperactivating stimuli-challenged macrophages, dendritic cells, monocytes, and specific nonimmune cells. Death inflammasome activation also induces GSDMD-mediated pyroptosis with no IL-1β secretion, which may increase lethality in vivo. The sublytic GSDMD pore formation associated with lower expressions of pyroptotic components, GSDMD-mediated extracellular vesicles, or other GSDMD-independent pathways that involve unconventional secretion could contribute to the cytokine-predominant uncoupling; the regulation of caspase-1 dynamics, which may generate various active species with different activities in terms of GSDMD or pro-IL-1β, could lead to pyroptosis-predominant uncoupling. These uncoupling preferences enable precise reactions to different stimuli of different intensities under specific conditions at the single-cell level, promoting cooperative cell and host fate decisions and participating in the pathogen "game". Appropriate decisions in terms of coupling and uncoupling are required to heal tissues and eliminate threats, and further studies exploring the inflammasome tilt toward pyroptosis or cytokine secretion may be helpful.
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Khare S, Devi S, Radian AD, Dorfleutner A, Stehlik C. Methods to Measure NLR Oligomerization I: Size Exclusion Chromatography, Co-immunoprecipitation, and Cross-Linking. Methods Mol Biol 2023; 2696:55-71. [PMID: 37578715 PMCID: PMC11073631 DOI: 10.1007/978-1-0716-3350-2_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Protein oligomerization is a common principle of regulating cellular responses. Oligomerization of NLRs is essential for the formation of NLR signaling platforms and can be detected by several biochemical techniques. Some of these biochemical methods can be combined with functional assays, such as caspase-1 activity assay. Size exclusion chromatography (SEC) allows separation of native protein lysates into different sized complexes by FPLC for follow-up analysis. Using co-immunoprecipitation (co-IP), combined with SEC or on its own, enables subsequent antibody-based purification of NLR complexes and associated proteins, which can then be analyzed by immunoblot and/or subjected to functional caspase-1 activity assay. Native gel electrophoresis also allows detection of the NLR oligomerization state by immunoblot. Chemical cross-linking covalently joins two or more molecules, thus capturing the oligomeric state with high sensitivity and stability. ASC oligomerization has been successfully used as readout for NLR/ALR inflammasome activation in response to various PAMPs and DAMPs in human and mouse macrophages and THP-1 cells. Here, we provide a detailed description of the methods used for NLRP7 oligomerization in response to infection with Staphylococcus aureus (S. aureus) in primary human macrophages, co-immunoprecipitation, and immunoblot analysis of NLRP7 and NLRP3 inflammasome complexes as well as caspase-1 activity assays. Also, ASC oligomerization is shown in response to dsDNA, LPS/ATP, and LPS/nigericin in mouse bone marrow-derived macrophages (BMDMs) and/or THP-1 cells or human primary macrophages.
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Affiliation(s)
| | - Savita Devi
- Department of Academic Pathology, Department of Biomedical Sciences and Samuel Oschin Comprehensive Cancer Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | | | - Andrea Dorfleutner
- Department of Academic Pathology, Department of Biomedical Sciences and Samuel Oschin Comprehensive Cancer Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Christian Stehlik
- Department of Academic Pathology, Department of Biomedical Sciences and Samuel Oschin Comprehensive Cancer Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
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