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Kishida D, Yazaki M, Nakamura A, Tsuchiya-Suzuki A, Ichikawa T, Shimojima Y, Sekijima Y. Impact of multiple MEFV variants of unknown significance on the diagnosis and clinical presentation of familial Mediterranean fever. Immunol Med 2024:1-6. [PMID: 38780575 DOI: 10.1080/25785826.2024.2358587] [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: 03/02/2024] [Accepted: 05/17/2024] [Indexed: 05/25/2024] Open
Abstract
The detection of variants of unknown significance (VUS) in familial Mediterranean fever (FMF) is common; however, their diagnostic value remains elusive, and the interpretation of multiple VUS remains difficult. Therefore, we examined FMF diagnosis-associated factors 1-year post-genetic testing in patients with only VUS and assessed the impact of multiple VUS on diagnosis and clinical features. A 1-year follow-up was conducted on patients clinically suspected of having FMF without confirmatory diagnosis owing to the presence of only VUS. Clinical features were compared between patients with a single VUS and those with multiple VUS among patients diagnosed with FMF. Among 261 patients followed up, 202 were diagnosed with FMF based on clinical judgment. No specific clinical symptoms or variant patterns at genetic testing were associated with diagnosis at 1 year. Multiple VUS was significantly and independently associated with a lower response to colchicine than single VUS among patients diagnosed with FMF. However, clinical symptoms showed no correlation with the number of VUS. In conclusion, predicting FMF diagnosis 1-year post-genetic testing in patients with only VUS remains challenging. Moreover, the impact of multiple VUS on FMF may be limited owing to the lack of correlation with clinical features, except colchicine response.
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Affiliation(s)
- Dai Kishida
- Department of Medicine (Neurology & Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
| | - Masahide Yazaki
- Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan
- Department of Clinical Laboratory Sciences, Shinshu University School of Health Sciences, Matsumoto, Japan
| | - Akinori Nakamura
- Department of Medicine (Neurology & Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
- Department of Clinical Research, National Hospital Organization Matsumoto Medical Center, Matsumoto, Japan
| | - Ayako Tsuchiya-Suzuki
- Department of Medicine (Neurology & Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
| | - Takanori Ichikawa
- Department of Medicine (Neurology & Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
| | - Yasuhiro Shimojima
- Department of Medicine (Neurology & Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
| | - Yoshiki Sekijima
- Department of Medicine (Neurology & Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
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Niewold TB, Aksentijevich I, Gorevic PD, Gibson G, Yao Q. Genetically transitional disease: conceptual understanding and applicability to rheumatic disease. Nat Rev Rheumatol 2024; 20:301-310. [PMID: 38418715 DOI: 10.1038/s41584-024-01086-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2024] [Indexed: 03/02/2024]
Abstract
In genomic medicine, the concept of genetically transitional disease (GTD) refers to cases in which gene mutation is necessary but not sufficient to cause disease. In this Perspective, we apply this novel concept to rheumatic diseases, which have been linked to hundreds of genetic variants via association studies. These variants are in the 'grey zone' between monogenic variants with large effect sizes and common susceptibility alleles with small effect sizes. Among genes associated with rare autoinflammatory diseases, many low-frequency and/or low-penetrance variants are known to increase susceptibility to systemic inflammation. In autoimmune diseases, hundreds of HLA and non-HLA genetic variants have been revealed to be modest- to moderate-risk alleles. These diseases can be reclassified as GTDs. The same concept could apply to many other human diseases. GTD could improve the reporting of genetic testing results, diagnostic yields, genetic counselling and selection of therapy, as well as facilitating research using a novel approach to human genetic diseases.
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Affiliation(s)
- Timothy B Niewold
- Department of Rheumatology, Hospital for Special Surgery, New York, NY, USA
| | - Ivona Aksentijevich
- Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Peter D Gorevic
- Division of Rheumatology, Allergy and Immunology, Stony Brook University Renaissance School of Medicine, Stony Brook, NY, USA
| | - Greg Gibson
- Center for Integrative Genomics, School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Qingping Yao
- Division of Rheumatology, Allergy and Immunology, Stony Brook University Renaissance School of Medicine, Stony Brook, NY, USA.
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La Bella S, Di Ludovico A, Di Donato G, Basaran O, Ozen S, Gattorno M, Chiarelli F, Breda L. The pyrin inflammasome, a leading actor in pediatric autoinflammatory diseases. Front Immunol 2024; 14:1341680. [PMID: 38250061 PMCID: PMC10796709 DOI: 10.3389/fimmu.2023.1341680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 12/14/2023] [Indexed: 01/23/2024] Open
Abstract
The activation of the pyrin inflammasome represents a highly intriguing mechanism employed by the innate immune system to effectively counteract pathogenic agents. Despite its key role in innate immunity, pyrin has also garnered significant attention due to its association with a range of autoinflammatory diseases (AIDs) including familial Mediterranean fever caused by disruption of the MEFV gene, or in other genes involved in its complex regulation mechanisms. Pyrin activation is strictly dependent on homeostasis-altering molecular processes, mostly consisting of the disruption of the small Ras Homolog Family Member A (RhoA) GTPases by pathogen toxins. The downstream pathways are regulated by the phosphorylation of specific pyrin residues by the kinases PKN1/2 and the binding of the chaperone 14-3-3. Furthermore, a key role in pyrin activation is played by the cytoskeleton and gasdermin D, which is responsible for membrane pores in the context of pyroptosis. In addition, recent evidence has highlighted the role of steroid hormone catabolites and alarmins S100A8/A9 and S100A12 in pyrin-dependent inflammation. The aim of this article is to offer a comprehensive overview of the most recent evidence on the pyrin inflammasome and its molecular pathways to better understand the pathogenesis behind the significant group of pyrin-related AIDs.
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Affiliation(s)
- Saverio La Bella
- Department of Pediatrics, "G. D'Annunzio" University of Chieti, Chieti, Italy
| | - Armando Di Ludovico
- Department of Pediatrics, "G. D'Annunzio" University of Chieti, Chieti, Italy
| | - Giulia Di Donato
- Department of Pediatrics, "G. D'Annunzio" University of Chieti, Chieti, Italy
| | - Ozge Basaran
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Türkiye
| | - Seza Ozen
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Türkiye
| | - Marco Gattorno
- UOC Rheumatology and Autoinflammatory Diseases, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Francesco Chiarelli
- Department of Pediatrics, "G. D'Annunzio" University of Chieti, Chieti, Italy
| | - Luciana Breda
- Department of Pediatrics, "G. D'Annunzio" University of Chieti, Chieti, Italy
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Tuncer Kuru F, Gokcen N, Yazici A, Cefle A. Disease severity and genotype-phenotype correlation in adult patients with familial Mediterranean fever. Mod Rheumatol 2023; 34:214-219. [PMID: 36688581 DOI: 10.1093/mr/road007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/30/2022] [Accepted: 01/05/2023] [Indexed: 01/24/2023]
Abstract
OBJECTIVES To assess the relationships of disease severity with genotype and phenotype in adult familial Mediterranean fever patients. METHODS Two-hundred seventy-five patients included in the study were divided into four groups according to their mutations: Group 1, M694V homozygous; Group 2, M694V-other; Group 3, other-other; and Group 4, no meaningful gene variants. Disease severity was evaluated using the Pras disease severity score. The association between Pras scores and other possible predictors was assessed by the multiple linear regression analysis. RESULTS In this study, 12.4% of all patients were in Group 1, 55.3% were in Group 2, 26.5% were in Group 3, and 5.8% were in Group 4. Pras scores were higher in Group 1 than in Groups 2, 3, and 4 (post hoc pairwise comparisons; P = .001, P < .001, and P = .001, respectively). Age at disease onset and age at diagnosis were found moderately and strongly correlated with Pras scores. Patients with moderate and severe disease were intensely involved in Group 1. CONCLUSIONS Higher Pras scores, earlier age of symptoms and diagnosis, more frequent arthritis and erysipelas-like erythema, and higher colchicine dose are closely associated with M694V homozygous familial Mediterranean fever patients. These patients also have mostly moderate and severe disease severity.
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Affiliation(s)
- Fatma Tuncer Kuru
- Division of Rheumatology, Department of Internal Medicine, School of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Neslihan Gokcen
- Division of Rheumatology, Department of Internal Medicine, School of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Ayten Yazici
- Division of Rheumatology, Department of Internal Medicine, School of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Ayse Cefle
- Division of Rheumatology, Department of Internal Medicine, School of Medicine, Kocaeli University, Kocaeli, Turkey
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Di Ciaula A, Iacoviello M, Bonfrate L, Khalil M, Shanmugam H, Lopalco G, Bagnulo R, Garganese A, Iannone F, Resta N, Portincasa P, Stella A. Genetic and clinical features of familial mediterranean fever (FMF) in a homogeneous cohort of patients from South-Eastern Italy. Eur J Intern Med 2023; 115:79-87. [PMID: 37183082 DOI: 10.1016/j.ejim.2023.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/23/2023] [Accepted: 05/08/2023] [Indexed: 05/16/2023]
Abstract
Familial Mediterranean Fever (FMF) is linked with the MEFV gene and is the commonest among monogenic autoinflammatory diseases, with high prevalence in the Mediterranean basin. Although the clinical presentation of FMF has a major role in diagnosis, genotype/phenotype correlations and the role of "benign" gene variants (as R202Q) appear highly variable and incompletely clear, making difficult to select the most effective strategy in the management of patients. Aim of the present study was to investigate the clinical presentation and the genetic background in a homogenous cohort of patients from Apulia (south eastern Italy). We investigated 217 patients with a clinical suspect of autoinflammatory diseases, who were characterized for the occurrence of specific symptoms and with next generation sequencing by a 4-gene panel including MEFV, MVK, NLRP3 and TNFRSF1A. A genetic change was identified in 122 (53.7%) patients, with 161 different MEFV variants recorded in 100 individuals, 10 variants in NLRP3, and 6 each in TNFRSF1A and MVK. The benign variant R202Q was largely prevalent (41.6% of all MEFV variants). When patients were selected according the number of pathogenic MEFV variants (0, 1, or 2 pathogenic variants), results failed to show significant links between the frequency of symptoms and the number of pathogenic variants. Only family history and Pras score (indicative for severity of disease) predicted the presence of pathogenic variants, as compared with carriers of variants considered of uncertain significance or benign. Fever >38 °C and arthralgias appeared more frequently in R202Q-positive patients than in non-R202Q carriers. These two subgroups showed comparable duration of fever, occurrence of myalgia, abdominal and chest pain, Pras, and IFFS scores. In conclusion, results confirm that FMF manifests in mild form in non-middle eastern patients. This possibility partly affects the reliability of clinical criteria/scores. Furthermore, the presence of the R202Q variant might not be completely neutral in selected groups of patients.
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Affiliation(s)
- Agostino Di Ciaula
- Clinica Medica "A. Murri", Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Matteo Iacoviello
- Laboratory of Medical Genetics, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Leonilde Bonfrate
- Clinica Medica "A. Murri", Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Mohamad Khalil
- Clinica Medica "A. Murri", Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Harshitha Shanmugam
- Clinica Medica "A. Murri", Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Giuseppe Lopalco
- Rheumatology Unit, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Rosanna Bagnulo
- Laboratory of Medical Genetics, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | | | - Florenzo Iannone
- Rheumatology Unit, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Nicoletta Resta
- Laboratory of Medical Genetics, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy; Laboratory of Medical Genetics, AOU Hospital Policlinico, Bari, Italy
| | - Piero Portincasa
- Clinica Medica "A. Murri", Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy
| | - Alessandro Stella
- Laboratory of Medical Genetics, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), Università degli Studi di Bari Aldo Moro, Bari, Italy; Laboratory of Medical Genetics, AOU Hospital Policlinico, Bari, Italy.
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Kisaoglu H, Baba O, Kalyoncu M. Genotype-Phenotype Associations of Children With Familial Mediterranean Fever in a Cohort Consisting of M694V Mutation and Implications for Colchicine-Resistant Disease. J Clin Rheumatol 2023; 29:207-213. [PMID: 36870084 DOI: 10.1097/rhu.0000000000001953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
OBJECTIVES The aim of this study was to investigate the clinical associations of the second allele mutations and the effect of genotype and presenting features on colchicine resistance in children with familial Mediterranean fever (FMF), carrying at least one M694V variant. METHODS The medical records of the patients diagnosed with FMF, in whom at least one allele M694V mutation was detected, were reviewed. Patients were grouped according to the genotype as M694V homozygotes, compound heterozygote M694V with an exon 10 mutation, compound heterozygote M694V with a variant of unknown significance (VUS), and M694V heterozygotes. Disease severity was assessed with the International Severity Scoring System for FMF. RESULTS Among the 141 patients included, homozygote M694V (43.3%) was the most frequent MEFV genotype. Clinical manifestations of FMF at diagnosis were not significantly different according to genotypic alterations except homozygote M694V. Besides, homozygous M694V was associated with a more severe disease, with more frequent comorbidities and colchicine-resistant disease. A lower disease severity score was observed in compound heterozygotes with VUS than in M694V heterozygotes (median 1 vs 2, p = 0.006). Regression analysis revealed that homozygous M694V, arthritis, and frequency of attacks were associated with an increased risk of colchicine-resistant disease. CONCLUSIONS Clinical manifestations of FMF at diagnosis with a M694V allele were predominantly influenced by the M694V rather than the second allele mutations. Although homozygous M694V was associated with the most severe form, the presence of compound heterozygosity with a VUS did not affect disease severity or clinical features. Homozygous M694V confers the highest risk of colchicine-resistant disease.
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Affiliation(s)
- Hakan Kisaoglu
- From the Division of Pediatric Rheumatology, Department of Pediatrics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Cohen K, Spielman S, Semo-Oz R, Bitansky G, Gerstein M, Yacobi Y, Vivante A, Tirosh I. Colchicine treatment can be discontinued in a selected group of pediatric FMF patients. Pediatr Rheumatol Online J 2023; 21:2. [PMID: 36600239 PMCID: PMC9811732 DOI: 10.1186/s12969-022-00780-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 12/07/2022] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVES Familial Mediterranean Fever (FMF) patients are required to adhere to a life-long treatment with colchicine, primarily for preventing amyloidosis. As some patients may be asymptomatic for long periods of time, it remains unclear whether it is possible to discontinue colchicine treatment in a selective group of patients. We aimed to identify predictive characteristics for a successful cessation of colchicine therapy. METHODS Out of 646 FMF pediatric patients followed in our referral FMF clinic, colchicine treatment was discontinued in 51 patients. In this study we compared the genetic, demographic, and clinical characteristics between patients for whom a successful cessation of therapy was made (Group 1; n = 21) and patients for whom cessation of therapy was deemed a failure (Group 2; n = 30) and consequently had to resume colchicine therapy. RESULTS Patients for whom a successful cessation of therapy was achieved had no biallelic pathogenic MEFV mutations, were less likely to have "severe attacks" (two or more FMF characteristic symptoms) (24% vs 80%; P = 0.000067) and did not require higher than 1 mg/day of colchicine, prior to the drug cessation. Remission duration under colchicine treatment was significantly higher in group 1 compared with group 2 (4.36 years ±2.12 vs 2.53 years ±2; P = 0.0036). CONCLUSION This study supports the concept of colchicine free remission in a minority of FMF patients (3%). Holding treatment, under close monitoring, may be reasonable when selecting the appropriate patients.
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Affiliation(s)
- Keren Cohen
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Shiri Spielman
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel ,grid.460042.4Paediatric Rheumatology unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centrer, 52621 Ramat-Gan, Tel Hashomer Israel ,grid.413795.d0000 0001 2107 2845Department of Paediatrics A, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centre, Tel Hashomer, Israel
| | - Rotem Semo-Oz
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel ,grid.460042.4Paediatric Rheumatology unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centrer, 52621 Ramat-Gan, Tel Hashomer Israel ,grid.413795.d0000 0001 2107 2845Department of Paediatrics B, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centre, Tel Hashomer, Israel
| | - Guy Bitansky
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Maya Gerstein
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel ,grid.460042.4Paediatric Rheumatology unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centrer, 52621 Ramat-Gan, Tel Hashomer Israel
| | - Yonatan Yacobi
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel ,grid.460042.4Paediatric Rheumatology unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centrer, 52621 Ramat-Gan, Tel Hashomer Israel
| | - Asaf Vivante
- grid.12136.370000 0004 1937 0546Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel ,grid.413795.d0000 0001 2107 2845Department of Paediatrics B, Edmond and Lily Safra Children’s Hospital, Sheba Medical Centre, Tel Hashomer, Israel
| | - Irit Tirosh
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. .,Paediatric Rheumatology unit, Edmond and Lily Safra Children's Hospital, Sheba Medical Centrer, 52621, Ramat-Gan, Tel Hashomer, Israel. .,Department of Paediatrics B, Edmond and Lily Safra Children's Hospital, Sheba Medical Centre, Tel Hashomer, Israel.
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Aydin O, Egeli BH, Ozdogan H, Ugurlu S. Late-onset familial mediterranean fever: single-center experience and literature review. Intern Emerg Med 2022; 17:1301-1306. [PMID: 35061158 DOI: 10.1007/s11739-021-02912-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 12/09/2021] [Indexed: 11/05/2022]
Abstract
Familial Mediterranean fever (FMF) is a hereditary, autoinflammatory disease characterized by recurrent fever and serositis attacks. The disease onset occurs before 20 years of age in 90% of patients and rarely after the 4th decade. The aim of this study is to screen our FMF patient pool for patients with disease onset after age of 40 and to compare them to patients with early onset with regard to clinical and genetic features. The charts of 2020 patients registered in our FMF center in the years 2008-2017 were screened with regard to age of disease onset. Patients with disease onset after the age of 40 were considered as late-onset group (Group 1). The control group (Group 2) consisted of patients with a disease onset before the age of 20 who were randomly selected from the patient pool with twice the number of probands. Demographic, clinical and genetic data were recorded. Out of 2020 patients, the attacks of FMF had started after the fourth decade in 41 patients (2.02%), (Group 1). The male to female ratio was 1:1.7 in both groups. The delay of diagnosis was 5.6 ± 5.75 years in group 1, 10.7 ± 12.3 years in group 2. The only significant difference with regard to clinical features between two groups was the frequency of fever, which was present in 26 (63.4%) patients in group 1 and 67 (81.7%) in group 2 (p = 0.026). M694V mutation was more prevalent among early-onset group whereas exon 2 variants were more frequent in patients with late onset. The mean colchicine dose in the last 6 months was 1.38 ± 0.64 mg in group 1, and 1.61 ± 0.47 mg in group 2. FMF may start after 40 years of age in approximately 2% of the patients. Lower frequency of fever, lower daily colchicine dose and lower prevalence of exon 10 mutations point out that FMF patients with a disease onset after 40 years of age experience a milder disease compared to those with an onset before the second decade of life.
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Affiliation(s)
- Okan Aydin
- Cerrahpasa Medical Faculty, University of Istanbul-Cerrahpasa, Istanbul, Turkey
| | - Bugra Han Egeli
- Cerrahpasa Medical Faculty, University of Istanbul-Cerrahpasa, Istanbul, Turkey
| | - Huri Ozdogan
- Division of Rheumatology, Department of Internal Medicine, Cerrahpasa Medical Faculty, University of Istanbul-Cerrahpasa, Istanbul, Turkey
| | - Serdal Ugurlu
- Division of Rheumatology, Department of Internal Medicine, Cerrahpasa Medical Faculty, University of Istanbul-Cerrahpasa, Istanbul, Turkey.
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Stella A, Portincasa P. The unsolved mystery of MEFV variants variable expressivity in Familial Mediterranean Fever. Intern Emerg Med 2022; 17:1255-1259. [PMID: 35809153 DOI: 10.1007/s11739-022-03027-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 06/06/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Alessandro Stella
- Laboratory of Human Genetics, Department of Biomedical Sciences and Human Oncology, University of Bari "Aldo Moro", Bari, Italy.
| | - Piero Portincasa
- Division of Internal Medicine, Department of Biomedical Sciences and Human Oncology, Clinica Medica "A Murri", University of Bari "Aldo Moro", Bari, Italy
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10
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Kırnaz B, Gezgin Y, Berdeli A. MEFV gene allele frequency and genotype distribution in 3230 patients' analyses by next generation sequencing methods. Gene 2022; 827:146447. [PMID: 35358658 DOI: 10.1016/j.gene.2022.146447] [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: 12/14/2021] [Revised: 02/23/2022] [Accepted: 03/18/2022] [Indexed: 11/30/2022]
Abstract
Familial Mediterranean Fever (FMF, OMIM ID: 249100) is the most common autoinflammatory, autosomal recessive disease caused by mutations in the MEFV gene. It is widespread in the Mediterranean, primarily among Turkish, Armenian, Arab and Jewish. This study aims to examine genotype distributions of common MEFV variants in the Turkish population using targeted NGS and to evaluate all rare mutations. It included 3230 people applying to Ege University Children's Hospital Molecular Medicine Laboratory with the suspicion of autoinflammatory disease between 2017 and 2021. MEFV missense variant was detected in 1839 (56.9%) individuals. One or more mutations were found in them. 1063 patients were heterozygous (57.8%), 410 were compound heterozygous (22.3%), 238 were complex genotype (12.9%), and 128 were homozygous (7%). 56 different mutations and 141 genotypes were detected, two of which were novel (p.His87Arg, c.260A > G and p.Leu396Phe, c.1186C > T). These were determined as 6benign, 40 uncertain significant, 3 likely pathogenic and 7 pathogenic according to the ACMG classification. The most common ones were R202Q (n = 1097, 37.48%), E148Q (n = 512, 17.49%), M694V (n = 493, 16.84%), V726A (n = 155, 5.30%), M680I (n = 150, 5.12%), P369S (n = 108, 3.69%), R408Q (n = 95, 3.25%) respectively. They constitute 89.17 % of the entire patient population. In conclusion, DNA variants/mutations in the MEFV gene were evaluated in 3230 patients. To date, no mutation screening has been encountered in such a large population using NGS. Genotype distributions of both common and rare mutations were revealed. The obtained data will hopefully contribute to the future genotype-phenotype studies of FMF disease.
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Affiliation(s)
- Berkay Kırnaz
- Ege University, Faculty of Medicine, Molecular Medicine Laboratory, İzmir, Turkey.
| | - Yüksel Gezgin
- Ege University, Faculty of Medicine, Molecular Medicine Laboratory, İzmir, Turkey
| | - Afig Berdeli
- Ege University, Faculty of Medicine, Molecular Medicine Laboratory, İzmir, Turkey; Ege University, Faculty of Medicine, Department of Pediatric Rheumatology, Izmir, Turkey
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Arici ZS, Romano M, Piskin D, Guzel F, Sahin S, Berard RA, Yilmaz MI, Demirkaya E. Evaluation of E148Q and Concomitant AA Amyloidosis in Patients with Familial Mediterranean Fever. J Clin Med 2021; 10:3511. [PMID: 34441808 PMCID: PMC8397076 DOI: 10.3390/jcm10163511] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/23/2021] [Accepted: 08/06/2021] [Indexed: 12/02/2022] Open
Abstract
The aim of the study was to compare the clinical phenotype of patients with familial Mediterranean fever (FMF)-related AA amyloidosis, according to the age of FMF diagnosis and E148Q genotype. Patients with biopsy-confirmed FMF-related AA amyloidosis were included in the study. Tel-Hashomer criteria were applied in the diagnosis of FMF. All patients had detailed baseline assessment of clinical features, renal functions, genetic testing, histopathological diagnosis of amyloidosis, and treatment received. Multiple comparisons were performed according to the age of diagnosis, disease phenotype, mutation, and mortality. Our study included 169 patients with a diagnosis of AA amyloidosis. There were 101 patients diagnosed with FMF < 18 years of age and 68 patients diagnosed who were ≥18 years of age. The three most common clinical manifestations were fever (84.6%), abdominal pain (71.6%), and arthritis (66.9%). The most common allele among FMF patients was M694V (60.6%), followed by E148Q (21.4%), and M680I (10.3%). The most frequent genotypes were M694V/M694V (45.0%), M694V/E148Q (14.8%), and E148Q/E148Q (11.2%) among 169 patients in our cohort. During the follow-up period, 15 patients (10 male, 5 female) died, of whom 14 had M694V homozygous genotype and one was homozygous for E148Q. Clinicians should be aware of patients with homozygous E148Q genotype for close monitoring and further evaluation. The possible relationship between E148Q and AA amyloidosis needs to be confirmed in other ethnicities.
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Affiliation(s)
- Zehra Serap Arici
- Department of Paediatric Rheumatology, Sanliurfa Training and Research Hospital, Sanliurfa 63250, Turkey;
- Clinical Epidemiology, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Micol Romano
- Schulich School of Medicine & Dentistry, Department of Paediatrics, Division of Paediatric Rheumatology, University of Western Ontario, London, ON N6A 5W9, Canada; (M.R.); (D.P.); (R.A.B.)
| | - David Piskin
- Schulich School of Medicine & Dentistry, Department of Paediatrics, Division of Paediatric Rheumatology, University of Western Ontario, London, ON N6A 5W9, Canada; (M.R.); (D.P.); (R.A.B.)
- Lawson Health Research Institute, London Health Sciences Center, London, ON N6C 2R5, Canada
- Schulich School of Medicine & Dentistry, Department of Epidemiology and Biostatistics, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Ferhat Guzel
- Molecular Genetics Laboratories, Genetics Research and Genome Center, Department of Research and Development, Gentera Biotechnology, Istanbul 34406, Turkey;
| | - Sezgin Sahin
- Department of Pediatric Rheumatology, Basaksehir Cam ve Sakura City Hospital, University of Health Sciences, Istanbul 34480, Turkey;
| | - Roberta A. Berard
- Schulich School of Medicine & Dentistry, Department of Paediatrics, Division of Paediatric Rheumatology, University of Western Ontario, London, ON N6A 5W9, Canada; (M.R.); (D.P.); (R.A.B.)
| | - Mahmut I. Yilmaz
- Division of Nephrology, Center for Epigenetic Health Solutions, Ankara 06810, Turkey;
| | - Erkan Demirkaya
- Schulich School of Medicine & Dentistry, Department of Paediatrics, Division of Paediatric Rheumatology, University of Western Ontario, London, ON N6A 5W9, Canada; (M.R.); (D.P.); (R.A.B.)
- Schulich School of Medicine & Dentistry, Department of Epidemiology and Biostatistics, University of Western Ontario, London, ON N6A 3K7, Canada
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Tanatar A, Sönmez HE, Sözeri B, Aktay Ayaz N. Comment on: Clinical significance of E148Q heterozygous variant in paediatric Familial Mediterranean Fever. Rheumatology (Oxford) 2021; 60:e294-e295. [PMID: 33677527 DOI: 10.1093/rheumatology/keab205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Ayşe Tanatar
- Department of Pediatric Rheumatology, Istanbul University Medical School, Istanbul, Turkey
| | | | - Betül Sözeri
- Department of Pediatric Rheumatology, University of Health Sciences, Ümraniye Research and Training Hospital, Istanbul, Turkey
| | - Nuray Aktay Ayaz
- Department of Pediatric Rheumatology, Istanbul University Medical School, Istanbul, Turkey
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13
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Öztürk K, Coşkuner T, Baglan E, Sönmez HE, Yener GO, Çakmak F, Demirkan FG, Tanatar A, Karadag SG, Ozdel S, Demir F, Çakan M, Aktay Ayaz N, Sözeri B. Real-Life Data From the Largest Pediatric Familial Mediterranean Fever Cohort. Front Pediatr 2021; 9:805919. [PMID: 35127599 PMCID: PMC8812847 DOI: 10.3389/fped.2021.805919] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 12/27/2021] [Indexed: 11/29/2022] Open
Abstract
Familial Mediterranean fever (FMF) is the most common monogenic autoinflammatory disease manifesting phenotypic heterogeneity. It is a clinically diagnosed disease supported by MEditerranean FeVer (MEFV) gene mutation analysis. However, the phenotype-genotype correlation is not yet established clearly. We aimed to determine the clinical findings, phenotype-genotype correlation, and treatment outcomes within a large pediatric FMF cohort. The medical charts of children with FMF who were diagnosed and followed up at the eight pediatric rheumatology units were reviewed retrospectively. All patients in the cohort were analyzed for sequence variants in exon 2,3,5 and 10 of the MEFV gene. Patients without any mutations or with polymorphisms including R202Q were excluded. A total of 3,454 children were involved in the study. The mean ± standard deviation of current age, age at symptom onset, and age at diagnosis were 12.1 ± 5.2, 5.1 ± 3.8, and 7.3 ± 4.0 years, respectively. Of 3,454 patients, 88.2% had abdominal pain, 86.7% had fever, 27.7% had arthritis, 20.2% had chest pain, 23% had myalgia, and 13.1% had erysipelas-like erythema. The most common MEFV mutation patterns were homozygous (32.5%) and heterozygous (29.9%) mutations of exon 10. Homozygous M694V was present in 969 patients (28.1%). Allele frequencies of common mutations were M694V (55.3%), M680I (11.3%), V726A (7.6%), and E148Q (7.2%). Children carrying homozygous or compound heterozygous exon 10 mutations had an earlier age of disease onset (4.6 vs. 5.6 years, p = 0.000) and a higher number of attacks per year (11.1 vs. 9.6, p = 0.001). Although 8% of the patients had a family history of amyloidosis, 0.3% (n = 11) had the presence of amyloidosis. M694V homozygosity was detected in nine patients who developed amyloidosis. Colchicine resistance was present in 4.2% of our patients. In this largest pediatric cohort reviewed and presented to date, patients with exon 10 mutations, particularly the M694V homozygous mutation, have been demonstrated earlier disease onset, annual attack count, and more frequent colchicine-resistant cases. Although E148Q is considered as a polymorphism in some populations, it was identified as a disease-causing mutation in our cohort. Secondary amyloidosis is still happening in adults however, it is extremely rare among children, presumably due to increased awareness, tight control, and the availability of anti-IL1 agents in colchicine-resistant cases.
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Affiliation(s)
- Kübra Öztürk
- Istanbul Medeniyet University, Göztepe Prof. Dr. Süleyman Yalçın City Hospital, Istanbul, Turkey
| | - Taner Coşkuner
- Department of Rheumatology, Umraniye Research and Training Hospital, University of Health Sciences, Istanbul, Turkey
| | - Esra Baglan
- Dr. Sami Ulus Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | | | | | - Figen Çakmak
- Pediatric Rheumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Fatma Gül Demirkan
- Pediatric Rheumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Ayşe Tanatar
- Pediatric Rheumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | | | - Semanur Ozdel
- Dr. Sami Ulus Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Ferhat Demir
- Department of Rheumatology, Umraniye Research and Training Hospital, University of Health Sciences, Istanbul, Turkey
| | - Mustafa Çakan
- Zeynep Kamil Maternity and Childrens Hospital, Istanbul, Turkey
| | - Nuray Aktay Ayaz
- Pediatric Rheumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Betül Sözeri
- Department of Rheumatology, Umraniye Research and Training Hospital, University of Health Sciences, Istanbul, Turkey
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