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Parentelli AS, Boursier G, Cuisset L, Georgin-Lavialle S. [Genetic mosaicism in Systemic Auto-Inflammatory Diseases: A review of the literature]. Rev Med Interne 2024:S0248-8663(24)00566-6. [PMID: 38762439 DOI: 10.1016/j.revmed.2024.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 04/07/2024] [Accepted: 05/02/2024] [Indexed: 05/20/2024]
Abstract
Systemic auto-inflammatory diseases (SAIDs) are disorders associated with deregulation of innate immunity in which patients present classically with systemic inflammatory manifestations, in particular fever, skin-mucosal rashes, arthromyalgia and abdominal pain, with an increase in blood biomarkers of inflammation. At the time of their discovery, these diseases were associated with constitutional mutations in genes encoding proteins involved in innate immunity, and it was then considered that they had to begin in childhood. This dogma of constitutional mutations in SAIDs is no longer so unquestionable, since 2005 several cases of mosaicism have been reported in the literature, initially in cryopyrinopathies, but also in other SAIDs in patients with obvious clinical phenotypes and late onset of disease expression, in particular in the VEXAS syndrome (Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic Syndrome) and very recently in MEVF gene. Next-generation sequencing techniques are more sensitive than Sanger for detecting mosaicisms. So, when a clinical diagnosis seems obvious but no constitutional mutation is found by low-depth genetic analysis, it is useful to discuss with expert geneticists whether to consider another genetic approach in a child or an adult. This modifies the situations in which clinicians can evoke these diseases. This review provides an update on mosaicism in SAIDs.
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Affiliation(s)
- A-S Parentelli
- Service de pédiatrie, CHU Félix-Guyon, allée des Topazes, 97400 Saint-Denis, Réunion.
| | - G Boursier
- Service de génétique moléculaire et cytogénomique, laboratoire de génétique des maladies rares et auto-inflammatoires, CHU de Montpellier, université de Montpellier, 371, avenue du Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France; Centre de référence des maladies auto-inflammatoires rares et de l'amylose inflammatoire (CEREMAIA), hôpital Tenon, Assistance publique-Hôpitaux de Paris, 4, rue de la Chine, 75020 Paris, France
| | - L Cuisset
- Service de médecine génomique des maladies de système et d'organe, hôpital Cochin, Assistance publique-Hôpitaux de Paris, université Paris Cité, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - S Georgin-Lavialle
- Service de médecine interne, hôpital Tenon, Assistance publique-Hôpitaux de Paris, Sorbonne université, 4, rue de la Chine, 75020 Paris, France; Centre de référence des maladies auto-inflammatoires rares et de l'amylose inflammatoire (CEREMAIA), hôpital Tenon, Assistance publique-Hôpitaux de Paris, 4, rue de la Chine, 75020 Paris, France
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Shen S, Duan J, Hu J, Qi Y, Kang L, Wang K, Chen J, Wu X, Xu B, Gu R. Colchicine alleviates inflammation and improves diastolic dysfunction in heart failure rats with preserved ejection fraction. Eur J Pharmacol 2022; 929:175126. [PMID: 35779623 DOI: 10.1016/j.ejphar.2022.175126] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 06/09/2022] [Accepted: 06/24/2022] [Indexed: 01/23/2023]
Abstract
PURPOSE Several studies have reported that colchicine attenuates cardiac inflammation and improves cardiac function in myocardial infarction and atrial fibrillation. However, no study has investigated its effect on heart failure with preserved ejection fraction (HFpEF). Hence, this study aimed to assess its efficacy in a high salt diet (HSD)-induced HFpEF rat model. METHODS A rat hypertension-induced HFpEF model was created by treating Dahl/SS salt-sensitive rats with an HSD for 6 weeks. Colchicine was given via gavage daily as treatment. Cardiac function and inflammation were assessed using echocardiography, histology, and ELISA. Furthermore, the expression levels of NLRP3 and NF-κB signaling pathways were examined. RESULTS Treatment with colchicine increased survival and attenuated cardiac dysfunction, as indicated by decreased echocardiographic E/A ratio and longer exercise endurance along with reduced ventricular fibrosis and remodeling in HSD-induced Dahl rats. The treatment also reduced cardiac oxidative stress and inflammatory cell infiltration, as inferred from lower mRNA expressions of TNFα and CCL2 as well as protein expressions of NLRP3 and NF-κB pathways. CONCLUSION The findings signify that colchicine plays a crucial role in alleviating systemic inflammation and NLRP3 inflammation activation as well as in attenuating cardiac dysfunction and fibrosis in HSD-induced HFpEF model. Colchicine, therefore, holds therapeutic potential for further clinical applications.
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Affiliation(s)
- Song Shen
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Junfeng Duan
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Jiaxin Hu
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Yu Qi
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Lina Kang
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Kun Wang
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Jianzhou Chen
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Xiang Wu
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China
| | - Biao Xu
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China.
| | - Rong Gu
- Department of Cardiology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, PR China.
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Azambuja AS, Pimentel-Vera LN, Gonzalez EA, Poletto E, Pinheiro CV, Matte U, Giugliani R, Baldo G. Evidence for inflammasome activation in the brain of mucopolysaccharidosis type II mice. Metab Brain Dis 2020; 35:1231-1236. [PMID: 32623553 DOI: 10.1007/s11011-020-00592-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 06/23/2020] [Indexed: 12/16/2022]
Abstract
Hunter syndrome or mucopolysaccharidosis type II (MPS II) is an X-linked recessive disease caused by the deficiency of iduronate 2-sulfatase (IDS), leading to storage of undegraded heparan and dermatan sulfate. Patients with the severe form present neurological abnormalities, but the mechanisms of such alterations are unknown. Here, we hypothesized that the undegraded substances found in this disease could be recognized as damage-associated molecular patterns (DAMPS), leading to activation of the inflammasome. Brains from 2 and 5 months normal and MPS II mice were studied. We observed an increase in cathepsin B activity in the brain tissue and leakage of this enzyme from the lysosome to the cytoplasm in a MPS II neuronal cell line, which is a known activator of the inflammasome. Furthermore, Caspase-1 activity and IL-1-beta levels were elevated at 5 months, confirming that this pathway is indeed altered. Our results suggest that undegraded GAG activate the inflammasome pathway in MPS II and future studies could focus on blocking such pathway to better understand the role of this process to the pathogenesis of MPS II.
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Affiliation(s)
- A S Azambuja
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, UFRGS, Porto Alegre, Brazil
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
| | - L N Pimentel-Vera
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil
| | - E A Gonzalez
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil
| | - E Poletto
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil
| | - C V Pinheiro
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
| | - U Matte
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil
| | - R Giugliani
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil
| | - Guilherme Baldo
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, UFRGS, Porto Alegre, Brazil.
- Centro de Terapia Gênica-HCPA, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-903, Brazil.
- Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil.
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Burkert S, Schumann RR. RNA Sensing of Mycobacterium tuberculosis and Its Impact on TB Vaccination Strategies. Vaccines (Basel) 2020; 8:E67. [PMID: 32033104 DOI: 10.3390/vaccines8010067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/01/2020] [Accepted: 02/01/2020] [Indexed: 02/07/2023] Open
Abstract
Tuberculosis (TB) is still an important global threat and although the causing organism has been discovered long ago, effective prevention strategies are lacking. Mycobacterium tuberculosis (MTB) is a unique pathogen with a complex host interaction. Understanding the immune responses upon infection with MTB is crucial for the development of new vaccination strategies and therapeutic targets for TB. Recently, it has been proposed that sensing bacterial nucleic acid in antigen-presenting cells via intracellular pattern recognition receptors (PRRs) is a central mechanism for initiating an effective host immune response. Here, we summarize key findings of the impact of mycobacterial RNA sensing for innate and adaptive host immunity after MTB infection, with emphasis on endosomal toll-like receptors (TLRs) and cytosolic sensors such as NLRP3 and RLRs, modulating T-cell differentiation through IL-12, IL-21, and type I interferons. Ultimately, these immunological pathways may impact immune memory and TB vaccine efficacy. The novel findings described here may change our current understanding of the host response to MTB and potentially impact clinical research, as well as future vaccination design. In this review, the current state of the art is summarized, and an outlook is given on how progress can be made.
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Rodríguez-Luna A, Ávila-Román J, Oliveira H, Motilva V, Talero E. Fucoxanthin and Rosmarinic Acid Combination Has Anti-Inflammatory Effects through Regulation of NLRP3 Inflammasome in UVB-Exposed HaCaT Keratinocytes. Mar Drugs 2019; 17:E451. [PMID: 31374828 PMCID: PMC6722862 DOI: 10.3390/md17080451] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 07/29/2019] [Indexed: 01/23/2023] Open
Abstract
Excessive exposure to ultraviolet (UV) radiation is the main risk factor to develop skin pathologies or cancer because it encourages oxidative condition and skin inflammation. In this sense, strategies for its prevention are currently being evaluated. Natural products such as carotenoids or polyphenols, which are abundant in the marine environment, have been used in the prevention of oxidative stress due to their demonstrated antioxidant activities. Nevertheless, the anti-inflammatory activity and its implication in photo-prevention have not been extensively studied. Thus, we aimed to evaluate the combination of fucoxanthin (FX) and rosmarinic acid (RA) on cell viability, apoptosis induction, inflammasome regulation, and anti-oxidative response activation in UVB-irradiated HaCaT keratinocytes. We demonstrated for the first time that the combination of FX and RA (5 µM RA plus 5 μM FX, designated as M2) improved antioxidant and anti-inflammatory profiles in comparison to compounds assayed individually, by reducing UVB-induced apoptosis and the consequent ROS production. Furthermore, the M2 combination modulated the inflammatory response through down-regulation of inflammasome components such as NLRP3, ASC, and Caspase-1, and the interleukin (IL)-1β production. In addition, Nrf2 and HO-1 antioxidant genes expression increased in UVB-exposed HaCaT cells pre-treated with M2. These results suggest that this combination of natural products exerts photo-protective effects by down-regulating NRLP3-inflammasome and increasing Nrf2 signalling pathway.
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Affiliation(s)
- Azahara Rodríguez-Luna
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain
| | - Javier Ávila-Román
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain.
| | - Helena Oliveira
- Department of Biology, Faculty of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Virginia Motilva
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain
| | - Elena Talero
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain
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Pisetsky DS. Immune activation by histones: plusses and minuses in inflammation. Eur J Immunol 2013; 43:3163-6. [PMID: 24165954 DOI: 10.1002/eji.201344175] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 10/23/2013] [Accepted: 10/24/2013] [Indexed: 11/05/2022]
Abstract
Histones are highly cationic proteins that are essential components of the cell nucleus, interacting with DNA to form the nucleosome and regulating transcription. Histones, however, can transit from the cell nucleus during cell death and, once in an extracellular location, can serve as danger signals and activate immune cells. An article in this issue of the European Journal of Immunology [Eur. J. Immunol. 2013. 43: 3336-3342] reports that histones can activate monocyte-derived DCs via the NRLP3 inflammasome to induce the production of IL-1β. As such, histones, which can also stimulate TLRs, may drive events in the immunopathogenesis of a wide range of acute and chronic diseases marked by sterile inflammation. While the mechanism of this stimulation is not known, the positive charge of histones may provide a structural element to promote interaction with cells and activation of downstream signaling systems.
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Affiliation(s)
- David S Pisetsky
- Department of Medicine, Medical Research Service, Durham Veterans Affairs Medical Center, Duke University Medical Center, Durham, NC, USA
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