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Lee J, Bae KS, Rhim JW, Lee SY, Jeong DC, Kang JH. Macrophage Activation Syndrome in Children: Update on Diagnosis and Treatment. CHILDREN (BASEL, SWITZERLAND) 2024; 11:755. [PMID: 39062205 PMCID: PMC11274371 DOI: 10.3390/children11070755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/28/2024]
Abstract
Macrophage activation syndrome (MAS) is potentially fatal; so, early diagnosis and timely treatment are essential. However, detecting MAS is sometimes challenging because its principal features can be observed in other pediatric diseases that cause severe inflammation. Cytokine storm due to immune dysregulation represents the clinical and laboratory features of MAS that are included in the diagnostic criteria. Most cases of MAS occur as an underlying condition worsens and progresses. Therefore, a patient with autoimmune or autoinflammatory disease who shows unexplained clinical deterioration despite appropriate management should be considered at high risk for MAS (i.e., occult MAS). The basic principles of treatment are control of triggering factors, supportive care, and relief of hyperinflammation. Systemic steroids and cyclosporine A are frequently used as a first-line treatment. For the treatment of refractory MAS, cytokine-specific biologic agents such as anakinra have recently become preferred over traditional immunosuppressive agents such as etoposide. MAS might be underrecognized in pediatric patients with infectious and inflammatory diseases due to its diverse clinical presentations. Clinical suspicion of MAS is of the utmost importance for early recognition of the disease.
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Affiliation(s)
- Jin Lee
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.L.); (K.S.B.); (J.W.R.); (D.C.J.); (J.H.K.)
- Department of Pediatrics, Incheon St. Mary’s Hospital, The Catholic University of Korea, Incheon 21431, Republic of Korea
| | - Kil Seong Bae
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.L.); (K.S.B.); (J.W.R.); (D.C.J.); (J.H.K.)
- Department of Pediatrics, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul 03312, Republic of Korea
| | - Jung Woo Rhim
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.L.); (K.S.B.); (J.W.R.); (D.C.J.); (J.H.K.)
- Department of Pediatrics, Daejeon St. Mary’s Hospital, The Catholic University of Korea, Daejeon 34943, Republic of Korea
| | - Soo-Young Lee
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.L.); (K.S.B.); (J.W.R.); (D.C.J.); (J.H.K.)
- Department of Pediatrics, Bucheon St. Mary’s Hospital, The Catholic University of Korea, Bucheon 14647, Republic of Korea
- The Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Dae Chul Jeong
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.L.); (K.S.B.); (J.W.R.); (D.C.J.); (J.H.K.)
- The Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
- Department of Pediatrics, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jin Han Kang
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.L.); (K.S.B.); (J.W.R.); (D.C.J.); (J.H.K.)
- The Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
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Sztajnbok F, Fonseca AR, Campos LR, Lino K, Rodrigues MCF, Silva RM, de Almeida RG, Perazzio SF, Carvalho MDFF. Hemophagocytic lymphohistiocytosis and macrophage activation syndrome: two rare sides of the same devastating coin. Adv Rheumatol 2024; 64:28. [PMID: 38627860 DOI: 10.1186/s42358-024-00370-2] [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: 01/12/2024] [Accepted: 04/02/2024] [Indexed: 04/19/2024] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a rare genetic hyperinflammatory syndrome that occurs early in life. Macrophage activation syndrome (MAS) usually refers to a secondary form of HLH associated with autoimmunity, although there are other causes of secondary HLH, such as infections and malignancy. In this article, we reviewed the concepts, epidemiology, clinical and laboratory features, diagnosis, differential diagnosis, prognosis, and treatment of HLH and MAS. We also reviewed the presence of MAS in the most common autoimmune diseases that affect children. Both are severe diseases that require prompt diagnosis and treatment to avoid morbidity and mortality.
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Affiliation(s)
- Flavio Sztajnbok
- Department of Pediatrics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
- Pediatric Rheumatology Division, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- Rare Diseases Committee, Brazilian Society of Rheumatology (SBR), Rio de Janeiro, Brazil.
| | - Adriana Rodrigues Fonseca
- Department of Pediatrics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leonardo Rodrigues Campos
- Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, Brazil
- Pediatric Rheumatology Committee, Sociedade de Reumatologia do Rio de Janeiro 2022-2024, Rio de Janeiro, Brazil
| | - Kátia Lino
- Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, Brazil
| | - Marta Cristine Félix Rodrigues
- Pediatric Rheumatology Division, Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodrigo Moulin Silva
- Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rozana Gasparello de Almeida
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sandro Félix Perazzio
- Rare Diseases Committee, Brazilian Society of Rheumatology (SBR), Rio de Janeiro, Brazil
- Division of Rheumatology, Universidade Federal de São Paulo (UNIFESP), Sao Paulo, Brazil
| | - Margarida de Fátima Fernandes Carvalho
- Rare Diseases Committee, Brazilian Society of Rheumatology (SBR), Rio de Janeiro, Brazil
- Division of Pediatric Rheumatology, Universidade Estadual de Londrina (UEL), Paraná, Brazil
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Batu ED, Sener S, Balık Z, Bayındır Y, Cam V, Kasap Cuceoglu M, Uysal O, Aliyev E, Basaran Ö, Bilginer Y, Özen S. Is it possible to predict a disease course prone to macrophage activation syndrome at systemic juvenile idiopathic arthritis diagnosis? Clin Rheumatol 2024; 43:415-421. [PMID: 38012469 DOI: 10.1007/s10067-023-06828-w] [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: 08/07/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 11/29/2023]
Abstract
OBJECTIVES Macrophage activation syndrome (MAS) is a severe complication of systemic juvenile idiopathic arthritis (SJIA). We aimed to compare the characteristics of SJIA patients who developed MAS in the disease course to those who never experienced MAS. METHODS Patients with SJIA were included. The features of the patients at the time of SJIA diagnosis were compared. Multivariate logistic regression and ROC analyses were used while evaluating factors associated with MAS. RESULTS Overall, 126 SJIA patients (M/F:1.17) were included. Eighty-six (68.2%) never had MAS. At the time of SJIA diagnosis, age was younger; the duration of fever was longer; rash, hepatomegaly, and splenomegaly were more frequent and arthralgia/arthritis was less common among patients who had MAS in the follow-up than those who never had MAS. Also, white blood cell, neutrophil, and platelet counts and fibrinogen were lower, while transaminases, lactate dehydrogenase, triglyceride (TG), and ferritin levels were higher among patients with MAS than those without MAS. The multivariate regression analysis disclosed age at symptom onset, duration of fever, platelet count, TG and ferritin levels as independent MAS predictors. For ferritin level/platelet count (F/P) ratio at the time of SJIA diagnosis, a threshold of ≥1.1 performed best to predict a MAS-prone disease course with a sensitivity of 90% and a specificity of 82.6%. CONCLUSION The F/P ratio at the time of SJIA diagnosis may be a promising biomarker to predict MAS-prone disease course in SJIA. Determining MAS-prone patients at the time of SJIA diagnosis could assist physicians while tailoring SJIA treatment individually. Key points • Systemic juvenile idiopathic arthritis (SJIA) patients with macrophage activation syndrome (MAS) differ from SJIA patients who never have MAS, at the time of SJIA diagnosis. • It could be possible to predict a MAS-prone disease course at the time of SJIA diagnosis. • The ferritin/platelet ratio is a promising biomarker for predicting MAS-prone SJIA disease course.
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Affiliation(s)
- Ezgi Deniz Batu
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey.
| | - Seher Sener
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Zeynep Balık
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Yağmur Bayındır
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Veysel Cam
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Müşerref Kasap Cuceoglu
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Ozan Uysal
- Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Emil Aliyev
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Özge Basaran
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Yelda Bilginer
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
| | - Seza Özen
- Department of Pediatrics, Division of Rheumatology, Hacettepe University Faculty of Medicine, 06100, Ankara, Turkey
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Nakanuma S, Gabata R, Okazaki M, Seki A, Hosokawa K, Yokoyama T, Katano K, Sugita H, Tokoro T, Takada S, Makino I, Taniguchi T, Harada K, Yagi S. Hemophagocytic Lymphohistiocytosis With Elevated Cytokines Related to Macrophage Activation After Liver Transplantation for Autoimmune Hepatitis: A Case Report. Transplant Proc 2023; 55:1946-1950. [PMID: 37537076 DOI: 10.1016/j.transproceed.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/23/2023] [Indexed: 08/05/2023]
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a rare but lethal complication of liver transplantation (LT). HLH is characterized by pathologic macrophage activation with hypercytokinemia, excessive inflammation, and tissue destruction, resulting in progressive organ dysfunction. HLH is also known as macrophage activation syndrome (MAS) when complicated by rheumatic or autoinflammatory diseases. Measuring several serum cytokines could be helpful in diagnosing HLH and MAS. Cytokines related to macrophage activation: neopterin, interleukin-18 (IL-18), and soluble tumor necrosis factor receptors (sTNF-R) I and II have not been assessed in patients with HLH complicated by LT. In this case, these cytokines were evaluated in the perioperative period of LT. The patient was a 24-year-old woman who underwent living-donor LT for acute worsening of autoimmune hepatitis. On postoperative day 12, the patient was diagnosed with HLH on the basis of the criteria. Plasma exchange, steroid pulse therapy, intravenous immunoglobulin and granulocyte-colony stimulating factor effectively inhibited progression to lethal HLH. When HLH occurred after LT, cytokine analysis showed that neopterin, IL-18, sTNFR-I, and II were elevated: cytokine storm. Of note, cytokine analysis on hospital admission also revealed elevated cytokine levels. Particularly, IL-18 levels were markedly elevated, suggesting that activation of the innate immune system was involved. These results revealed that a cytokine storm and macrophage activation developed before LT. Based on these findings, cytokine analysis related to macrophage activation may be useful for diagnosing and predicting HLH and MAS in patients with LT.
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Affiliation(s)
- Shinichi Nakanuma
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan.
| | - Ryosuke Gabata
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Mitsuyoshi Okazaki
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Akihiro Seki
- Department of Gastroenterology, Graduate School of Medicine, Kanazawa University, Ishikawa, Japan
| | - Kohei Hosokawa
- Department of Hematology, Kanazawa University Hospital, Ishikawa, Japan
| | - Tadafumi Yokoyama
- Department of Pediatrics, Graduate School of Medical Sciences, Kanazawa University, Ishikawa, Japan
| | - Kaoru Katano
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Hiroaki Sugita
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Tomokazu Tokoro
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Satoshi Takada
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Isamu Makino
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
| | - Takumi Taniguchi
- Intensive Care Unit, Kanazawa University Hospital, Ishikawa, Japan
| | - Kenichi Harada
- Department of Human Pathology, Kanazawa University Graduate School of Medicine, Ishikawa, Japan
| | - Shintaro Yagi
- Department of Hepato-Biliary-Pancreatic Surgery and Transplantation, Kanazawa University, Ishikawa, Japan
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Wobma H, Bachrach R, Farrell J, Chang MH, Day‐Lewis M, Dedeoglu F, Fishman MP, Halyabar O, Harris C, Ibanez D, Kim L, Klouda T, Krone K, Lee PY, Lo MS, McBrearty K, Meidan E, Prockop SE, Samad A, Son MBF, Nigrovic PA, Casey A, Chang JC, Henderson LA. Development of a Screening Algorithm for Lung Disease in Systemic Juvenile Idiopathic Arthritis. ACR Open Rheumatol 2023; 5:556-562. [PMID: 37688362 PMCID: PMC10570670 DOI: 10.1002/acr2.11600] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/12/2023] [Accepted: 07/19/2023] [Indexed: 09/10/2023] Open
Abstract
OBJECTIVE Lung disease (LD) is an increasingly recognized complication of systemic juvenile idiopathic arthritis (sJIA). As there are no currently available guidelines for pulmonary screening in sJIA, we sought to develop such an algorithm at our institution. METHODS A multidisciplinary workgroup was convened, including members representing rheumatology, pulmonary, stem cell transplantation, and patient families. The workgroup leaders drafted an initial algorithm based on published literature and experience at our center. A modified Delphi approach was used to achieve agreement through three rounds of anonymous, asynchronous voting and a consensus meeting. Statements approved by the workgroup were rated as appropriate with moderate or high levels of consensus. These statements were organized into the final approved screening algorithm for LD in sJIA. RESULTS The workgroup ultimately rated 20 statements as appropriate with a moderate or high level of consensus. The approved algorithm recommends pulmonary screening for newly diagnosed patients with sJIA with clinical features that the workgroup agreed may confer increased risk for LD. These "red flag features" include baseline characteristics (young age of sJIA onset, human leukocyte antigen type, trisomy 21), high disease activity (macrophage activation syndrome [MAS], sJIA-related ICU admission, elevated MAS biomarkers), respiratory symptoms or abnormal pulmonary examination findings, and features of drug hypersensitivity-like reactions (eosinophilia, atypical rash, anaphylaxis). The workgroup achieved consensus on the recommended pulmonary work-up and monitoring guidelines. CONCLUSION We developed a pulmonary screening algorithm for sJIA-LD through a multidisciplinary consensus-building process, which will be revised as our understanding of sJIA-LD continues to evolve.
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Affiliation(s)
- Holly Wobma
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Ronny Bachrach
- Division of Immunology, Boston Children's HospitalBostonMassachusetts
| | - Joseph Farrell
- Division of Immunology, Boston Children's HospitalBostonMassachusetts
| | - Margaret H. Chang
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Megan Day‐Lewis
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Fatma Dedeoglu
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Martha P. Fishman
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Olha Halyabar
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Claudia Harris
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Daniel Ibanez
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Liyoung Kim
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Timothy Klouda
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Katie Krone
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Pui Y. Lee
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Mindy S. Lo
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Kyle McBrearty
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Esra Meidan
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Susan E. Prockop
- Dana‐Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical SchoolBostonMassachusetts
| | - Aaida Samad
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Mary Beth F. Son
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Peter A. Nigrovic
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Alicia Casey
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Joyce C. Chang
- Boston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
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De Benedetti F, Grom AA, Brogan PA, Bracaglia C, Pardeo M, Marucci G, Eleftheriou D, Papadopoulou C, Schulert GS, Quartier P, Antón J, Laveille C, Frederiksen R, Asnaghi V, Ballabio M, Jacqmin P, de Min C. Efficacy and safety of emapalumab in macrophage activation syndrome. Ann Rheum Dis 2023; 82:857-865. [PMID: 37001971 PMCID: PMC10314091 DOI: 10.1136/ard-2022-223739] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 02/02/2023] [Indexed: 04/03/2023]
Abstract
OBJECTIVES Macrophage activation syndrome (MAS) is a severe, life-threatening complication of systemic juvenile idiopathic arthritis (sJIA) and adult-onset Still's disease (AOSD). The objective of this study was to confirm the adequacy of an emapalumab dosing regimen in relation to interferon-γ (IFNγ) activity by assessing efficacy and safety. The efficacy outcome was MAS remission by week 8, based on clinical and laboratory criteria. METHODS We studied emapalumab, a human anti-IFNγ antibody, administered with background glucocorticoids, in a prospective single-arm trial involving patients who had MAS secondary to sJIA or AOSD and had previously failed high-dose glucocorticoids, with or without anakinra and/or ciclosporin. The study foresaw 4-week treatment that could be shortened or prolonged based on investigator's assessment of response. Patients entered a long-term (12 months) follow-up study. RESULTS Fourteen patients received emapalumab. All patients completed the trial, entered the long-term follow-up and were alive at the end of follow-up. The investigated dosing regimen, based on an initial loading dose followed by maintenance doses, was appropriate, as shown by rapid neutralisation of IFNγ activity, demonstrated by a prompt decrease in serum C-X-C motif chemokine ligand 9 (CXCL9) levels. By week 8, MAS remission was achieved in 13 of the 14 patients at a median time of 25 days. Viral infections and positive viral tests were observed. CONCLUSIONS Neutralisation of IFNγ with emapalumab was efficacious in inducing remission of MAS secondary to sJIA or AOSD in patients who had failed high-dose glucocorticoids. Screening for viral infections should be performed, particularly for cytomegalovirus. TRIAL REGISTRATION NUMBER NCT02069899 and NCT03311854.
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Affiliation(s)
| | - Alexei A Grom
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Paul A Brogan
- University College London Great Ormond Street Institute of Child Health, London, UK
| | - Claudia Bracaglia
- Division of Rheumatology, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Manuela Pardeo
- Division of Rheumatology, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Giulia Marucci
- Division of Rheumatology, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Despina Eleftheriou
- University College London Great Ormond Street Institute of Child Health, London, UK
| | | | - Grant S Schulert
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Pierre Quartier
- Pediatric Immuno-Hematology and Rheumatology Unit, RAISE Rare Disease Reference Centre, Hopital Universitaire Necker-Enfants Malades, Assistance Publique-Hopitaux de Paris, Paris, France
- Université Paris-Cité, Paris, France
| | - Jordi Antón
- Pediatric Rheumatology, Hospital Sant Joan de Deu, Barcelona, Spain
- Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
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Inoue N, Schulert GS. Mouse models of systemic juvenile idiopathic arthritis and macrophage activation syndrome. Arthritis Res Ther 2023; 25:48. [PMID: 36964620 PMCID: PMC10039518 DOI: 10.1186/s13075-023-03032-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/16/2023] [Indexed: 03/26/2023] Open
Abstract
Macrophage activation syndrome (MAS) is a life-threatening complication of pediatric rheumatic diseases, occurring most commonly in children with systemic juvenile idiopathic arthritis (SJIA). Despite several classes of currently available treatment options for SJIA, including biologic agents targeting IL-1 or IL-6, there remain severe cases suffering from refractory disease and recurrent MAS. The phenotype of MAS is similar to hemophagocytic lymphohistiocytosis (HLH), but the underlying pathophysiology of MAS complicating SJIA or other disorders has not been fully clarified. These facts make it challenging to develop and utilize animal models to study MAS. To date, there is no "perfect" model replicating MAS, but several models do demonstrate aspects of SJIA and/or MAS. In this review, we examine the proposed animal models of SJIA and MAS, focusing on how they reflect these disorders, what we have learned from the models, and potential future research questions. As we better understand the key features of each, animal models can be powerful tools to further define the pathophysiology of SJIA and MAS, and develop new treatment targets and strategies.
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Affiliation(s)
- Natsumi Inoue
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Grant S Schulert
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
- Department of Pediatrics, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH, MLC 4010, USA.
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Niizato D, Isoda T, Mitsuiki N, Kaneko S, Tomomasa D, Kamiya T, Takagi M, Imai K, Kajiwara M, Shimizu M, Morio T, Kanegane H. Case report: Optimized ruxolitinib-based therapy in an infant with familial hemophagocytic lymphohistiocytosis type 3. Front Immunol 2022; 13:977463. [PMID: 36505485 PMCID: PMC9731208 DOI: 10.3389/fimmu.2022.977463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 11/08/2022] [Indexed: 11/24/2022] Open
Abstract
Familial hemophagocytic lymphohistiocytosis (FHL) is a rare and fatal autosomal recessive immune disorder characterized by uncontrolled activation of T and NK cells, macrophages, and overproduction of inflammatory cytokines. Early hematopoietic cell transplantation (HCT) is required for long-term survival. Current therapy is based on the HLH-94/2004 protocol, but is insufficient to fully control disease activity. This case report describes an infant with FHL type 3 who, despite initial therapy with dexamethasone and etoposide, showed aberrant cytokine levels, including interleukin-18 (IL-18), chemokine ligand 9 (CXCL9), soluble interleukin-2 receptor (sIL-2R), and soluble tumor necrosis factor receptor type II (sTNF-RII). The Janus kinase inhibitor ruxolitinib was therefore coadministered. The patient was treated with dose-adjusted ruxolitinib guided by cytokine profiles, and was successfully prepared for HCT. The results demonstrate the effectiveness and safety of dose-adjusted ruxolitinib as a bridging therapy for FHL, and the value of monitoring cytokine levels, especially IL-18, CXCL9, sIL-2R, and sTNF-RII, as disease-activity markers for FHL.
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Affiliation(s)
- Daiki Niizato
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Takeshi Isoda
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan,*Correspondence: Takeshi Isoda,
| | - Noriko Mitsuiki
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Shuya Kaneko
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Dan Tomomasa
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Takahiro Kamiya
- Department of Clinical Research Center, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Masatoshi Takagi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kohsuke Imai
- Department of Community Pediatrics, Perinatal and Maternal Medicine, Tokyo Medical and Dental University (TMDU), Tokyo, Japan,Department of Pediatrics, National Defense Medical College, Tokorozawa, Japan
| | - Michiko Kajiwara
- Center for Blood Transfusion and Cell Therapy, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Masaki Shimizu
- Department of Child Health and Development, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Tomohiro Morio
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hirokazu Kanegane
- Department of Child Health and Development, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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9
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Ailioaie LM, Ailioaie C, Litscher G. Biomarkers in Systemic Juvenile Idiopathic Arthritis, Macrophage Activation Syndrome and Their Importance in COVID Era. Int J Mol Sci 2022; 23:12757. [PMID: 36361547 PMCID: PMC9655921 DOI: 10.3390/ijms232112757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 08/30/2023] Open
Abstract
Systemic juvenile idiopathic arthritis (sJIA) and its complication, macrophage activation syndrome (sJIA-MAS), are rare but sometimes very serious or even critical diseases of childhood that can occasionally be characterized by nonspecific clinical signs and symptoms at onset-such as non-remitting high fever, headache, rash, or arthralgia-and are biologically accompanied by an increase in acute-phase reactants. For a correct positive diagnosis, it is necessary to rule out bacterial or viral infections, neoplasia, and other immune-mediated inflammatory diseases. Delays in diagnosis will result in late initiation of targeted therapy. A set of biomarkers is useful to distinguish sJIA or sJIA-MAS from similar clinical entities, especially when arthritis is absent. Biomarkers should be accessible to many patients, with convenient production and acquisition prices for pediatric medical laboratories, as well as being easy to determine, having high sensitivity and specificity, and correlating with pathophysiological disease pathways. The aim of this review was to identify the newest and most powerful biomarkers and their synergistic interaction for easy and accurate recognition of sJIA and sJIA-MAS, so as to immediately guide clinicians in correct diagnosis and in predicting disease outcomes, the response to treatment, and the risk of relapses. Biomarkers constitute an exciting field of research, especially due to the heterogeneous nature of cytokine storm syndromes (CSSs) in the COVID era. They must be selected with utmost care-a fact supported by the increasingly improved genetic and pathophysiological comprehension of sJIA, but also of CSS-so that new classification systems may soon be developed to define homogeneous groups of patients, although each with a distinct disease.
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Affiliation(s)
- Laura Marinela Ailioaie
- Department of Medical Physics, Alexandru Ioan Cuza University, 11 Carol I Boulevard, 700506 Iasi, Romania
| | - Constantin Ailioaie
- Department of Medical Physics, Alexandru Ioan Cuza University, 11 Carol I Boulevard, 700506 Iasi, Romania
| | - Gerhard Litscher
- Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, Research Unit for Complementary and Integrative Laser Medicine, Traditional Chinese Medicine (TCM) Research Center Graz, Department of Anesthesiology and Intensive Care Medicine, Medical University of Graz, Auenbruggerplatz 39, 8036 Graz, Austria
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Shimizu M, Takei S, Mori M, Yachie A. Pathogenic roles and diagnostic utility of interleukin-18 in autoinflammatory diseases. Front Immunol 2022; 13:951535. [PMID: 36211331 PMCID: PMC9537046 DOI: 10.3389/fimmu.2022.951535] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/10/2022] [Indexed: 11/24/2022] Open
Abstract
Interleukin (IL)-18 is a pleiotropic, pro-inflammatory cytokine involved in the regulation of innate and adaptive immune responses. IL-18 has attracted increasing attention as a key mediator in autoinflammatory diseases associated with the development of macrophage activation syndrome (MAS) including systemic juvenile idiopathic arthritis and adult-onset Still’s disease. In these diseases, dysregulation of inflammasome activity and overproduction of IL-18 might be associated with the development of MAS by inducing natural killer cell dysfunction. Serum IL-18 levels are high in patients with these diseases and therefore are useful for the diagnosis and monitoring of disease activity. In contrast, a recent study revealed the overproduction of IL-18 was present in cases of autoinflammation without susceptibility to MAS such as pyogenic sterile arthritis, pyoderma gangrenosum, and acne (PAPA) syndrome. The pathogenic and causative roles of IL-18 remain unclear in these autoinflammatory diseases. Further investigations are necessary to clarify the role of IL-18 and its importance as a therapeutic target in the pathogenesis of autoinflammatory diseases.
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Affiliation(s)
- Masaki Shimizu
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- *Correspondence: Masaki Shimizu,
| | - Syuji Takei
- Department of Pediatrics, Field of Developmental Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Masaaki Mori
- Department of Lifetime Clinical Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akihiro Yachie
- Division of Medical Safety, Kanazawa University Hospital, Kanazawa, Japan
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Yachie A. Clinical perspectives and therapeutic strategies: pediatric autoinflammatory disease-a multi-faceted approach to fever of unknown origin of childhood. Inflamm Regen 2022; 42:21. [PMID: 35778759 PMCID: PMC9250222 DOI: 10.1186/s41232-022-00204-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 02/27/2022] [Indexed: 11/25/2022] Open
Abstract
Among the different etiologies for fever of unknown origin in children, infectious diseases are the most frequent final diagnosis, followed by autoimmune diseases and malignancies. Autoinflammatory diseases are relatively rare among children and are frequently overlooked as differential diagnoses for fever of unknown origin. Once the possibility of a particular autoimmune disease is considered by physicians, the diagnosis might be easily made by a genetic approach because many of autoinflammatory diseases are of monogenic origin. To reach the diagnosis, detailed history-taking, precise physical examinations, and cytokine profiling as well as extensive mutation analysis of candidate genes should be undertaken for febrile children. Such the approach will protect the patients, and their family to undergo “diagnostic odyssey” in which unnecessary and sometimes risky diagnostic and therapeutic interventions are taken. This short review discusses the clinical and laboratory features of familial Mediterranean fever and systemic juvenile idiopathic arthritis, as representative illnesses of monogenic and polygenic autoinflammatory diseases, respectively. Cytokine profiling and mutation analyses both help to understand and decipher the heterogeneous pathologies in both disease categories.
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Affiliation(s)
- Akihiro Yachie
- Division of Medical Safety, Kanazawa University Hospital, 13-1 Takaramachi, Kanazawa, 920-8641, Japan.
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12
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Targeting interferon-γ in hyperinflammation: opportunities and challenges. Nat Rev Rheumatol 2021; 17:678-691. [PMID: 34611329 DOI: 10.1038/s41584-021-00694-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2021] [Indexed: 02/08/2023]
Abstract
Interferon-γ (IFNγ) is a pleiotropic cytokine with multiple effects on the inflammatory response and on innate and adaptive immunity. Overproduction of IFNγ underlies several, potentially fatal, hyperinflammatory or immune-mediated diseases. Several data from animal models and/or from translational research in patients point to a role of IFNγ in hyperinflammatory diseases, such as primary haemophagocytic lymphohistiocytosis, various forms of secondary haemophagocytic lymphohistiocytosis, including macrophage activation syndrome, and cytokine release syndrome, all of which are often managed by rheumatologists or in consultation with rheumatologists. Given the effects of IFNγ on B cells and T follicular helper cells, a role for IFNγ in systemic lupus erythematosus pathogenesis is emerging. To improve our understanding of the role of IFNγ in human disease, IFNγ-related biomarkers that are relevant for the management of hyperinflammatory diseases are progressively being identified and studied, especially because circulating levels of IFNγ do not always reflect its overproduction in tissue. These biomarkers include STAT1 (specifically the phosphorylated form), neopterin and the chemokine CXCL9. IFNγ-neutralizing agents have shown efficacy in the treatment of primary haemophagocytic lymphohistiocytosis in clinical trials and initial promising results have been obtained in various forms of secondary haemophagocytic lymphohistiocytosis, including macrophage activation syndrome. In clinical practice, there is a growing body of evidence supporting the usefulness of circulating CXCL9 levels as a biomarker reflecting IFNγ production.
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Erkens R, Esteban Y, Towe C, Schulert G, Vastert S. Pathogenesis and Treatment of Refractory Disease Courses in Systemic Juvenile Idiopathic Arthritis: Refractory Arthritis, Recurrent Macrophage Activation Syndrome and Chronic Lung Disease. Rheum Dis Clin North Am 2021; 47:585-606. [PMID: 34635293 DOI: 10.1016/j.rdc.2021.06.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Systemic juvenile idiopathic arthritis is a distinct and heterogeneous disease presently classified under the umbrella of juvenile idiopathic arthritis, with some patients following a monophasic remitting course, whereas others have persistent disease with chronic organ- and life-threatening complications. Although biologic therapies have revolutionized treatment, recent follow-up studies report significant numbers of children with persistently active disease on long term follow-up. This review focuses on refractory disease courses, specifically refractory arthritis, systemic juvenile idiopathic arthritis with recurrent, or longstanding signs of macrophage activation syndrome, and systemic juvenile idiopathic arthritis associated with suspected, probable, or definite lung disease.
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Affiliation(s)
- Remco Erkens
- Division of Pediatric Rheumatology & Immunology, Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands; Center for Translational Immunology, University Medical Center Utrecht, University of Utrecht, the Netherlands
| | - Ysabella Esteban
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA
| | - Christopher Towe
- Division of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Grant Schulert
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Sebastiaan Vastert
- Division of Pediatric Rheumatology & Immunology, Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands; Center for Translational Immunology, University Medical Center Utrecht, University of Utrecht, the Netherlands.
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Henderson LA. Deciphering the cytokine fingerprint of macrophage activation syndrome. THE LANCET. RHEUMATOLOGY 2021; 3:e535-e538. [PMID: 38287614 DOI: 10.1016/s2665-9913(21)00180-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 05/19/2021] [Indexed: 01/31/2024]
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Unbalanced expression of membrane-bound and soluble programmed cell death 1 and programmed cell death ligand 1 in systemic juvenile idiopathic arthritis. Clin Immunol 2021; 229:108800. [PMID: 34289424 DOI: 10.1016/j.clim.2021.108800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/26/2021] [Accepted: 07/14/2021] [Indexed: 11/24/2022]
Abstract
The study aimed to investigate the soluble programmed death-1 (sPD-1) and its ligand (sPD-L1) levels in systemic juvenile idiopathic arthritis (sJIA) patients and elucidate its underlying immunomodulatory mechanisms. Plasma levels of sPD-1, sPD-L1 and related cytokines and proteins were detected using an enzyme-linked immunosorbent assay (ELISA) and Luminex. The effects of PD-1/PD-L1 signal on mDC (myeloid dendritic cell) and IL-6 secretion were measured using flow cytometry. The results revealed decreased levels of sPD-1 in sJIA patients negatively correlated with JADAS-27, PGA, PtGA and CRP. sJIA patients had lower CD86 and MHC-II expression on mDC. When blocking PD-1/PD-L1 signal, IL-6 secretion of DC were increased. Our finding displayed downregulated sPD-1 was related with clinical indicators and could be a new biomarker for sJIA diagnosis. The reduced membrane and soluble forms of PD-1/PD-L1 might take part in sJIA pathogenesis by enhancing mDC proliferation and IL-6 secretion.
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Rosina S, Natoli V, Santaniello S, Trincianti C, Consolaro A, Ravelli A. Novel biomarkers for prediction of outcome and therapeutic response in juvenile idiopathic arthritis. Expert Rev Clin Immunol 2021; 17:853-870. [PMID: 34139935 DOI: 10.1080/1744666x.2021.1945441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION The search for biomarkers in juvenile idiopathic arthritis (JIA) is a promising and rapidly expanding field of investigation. The biomarkers identified so far may help to dissect the clinical heterogeneity of the illness, measure the level of disease activity, predict clinical remission, relapse, response to medications, course over time, complications, and forestall disease flares. AREAS COVERED We provide a summary of the most recent advances in the development and application of biomarkers in JIA. We performed a PubMed search for significant articles combining predetermined keywords related to biomarkers in non-systemic and systemic JIA, chronic uveitis, and macrophage activation syndrome (MAS). The biomarkers available or under study are presented and discussed separately for non-systemic and systemic subtypes and for the two main disease complications, uveitis and MAS. EXPERT OPINION The incorporation of valid and reliable biomarkers in standard clinical care may help to design better patient-tailored treatment regimens and to improve the therapeutic strategies based on the treat-to-target approach. The establishment of biomarkers that predict the risk of disease flare may lead to define the optimal modalities for treatment discontinuation after the achievement of clinical remission.
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Affiliation(s)
- Silvia Rosina
- UOC Clinica Pediatrica E Reumatologia, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Valentina Natoli
- Dipartimento Di Neuroscienze, Riabilitazione, Oftalmologia, Genetica E Scienze Materno-Infantili (Dinogmi), Università Degli Studi Di Genova, Genoa, Italy
| | - Stefania Santaniello
- Dipartimento Di Neuroscienze, Riabilitazione, Oftalmologia, Genetica E Scienze Materno-Infantili (Dinogmi), Università Degli Studi Di Genova, Genoa, Italy
| | - Chiara Trincianti
- Dipartimento Di Neuroscienze, Riabilitazione, Oftalmologia, Genetica E Scienze Materno-Infantili (Dinogmi), Università Degli Studi Di Genova, Genoa, Italy
| | - Alessandro Consolaro
- UOC Clinica Pediatrica E Reumatologia, IRCCS Istituto Giannina Gaslini, Genoa, Italy.,Dipartimento Di Neuroscienze, Riabilitazione, Oftalmologia, Genetica E Scienze Materno-Infantili (Dinogmi), Università Degli Studi Di Genova, Genoa, Italy
| | - Angelo Ravelli
- UOC Clinica Pediatrica E Reumatologia, IRCCS Istituto Giannina Gaslini, Genoa, Italy.,Dipartimento Di Neuroscienze, Riabilitazione, Oftalmologia, Genetica E Scienze Materno-Infantili (Dinogmi), Università Degli Studi Di Genova, Genoa, Italy.,Sechenov First Moscow State Medical University, Moscow, Russian Federation
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Ozdel S, Baglan E, Cakıcı EK, Yazılıtas F, Yücel H, Senel S, Bulbul M. Clinical features in 305 patients with juvenile idiopathic arthritis: A single center Turkish Study. Pediatr Int 2021; 63:636-642. [PMID: 32969552 DOI: 10.1111/ped.14481] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/11/2020] [Accepted: 09/15/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Juvenile idiopathic arthritis (JIA) is the most common chronic rheumatologic disease of childhood. The various subtypes of JIA differ in clinical features and treatments. The aim of this study was to analyze the frequency of JIA subtypes, patient demographic and clinical features, as well as the rates of macrophage activation syndrome, uveitis, and remission in Turkish JIA patients treated at a single center, and to compare the findings to those in the literature. METHODS The files of all JIA patients treated at our pediatric rheumatology department between January 2017 and January 2019 were retrospectively reviewed. Patient demographic, clinical, and laboratory data were obtained from the patients' files and the hospital database. RESULTS The study included 305 patients (180 females) with a mean age at onset of 7.83 ± 4.62 years. Among all the JIA subtypes, the most frequent was oligoarthritis (41.6%), followed by enthesitis-related arthritis (29.2%), rheumatoid factor (RF)-negative polyarthritis (13.4%), systemic arthritis (9.5%), RF-positive polyarthritis (2.6%), psoriatic arthritis (2.0%), and undifferentiated arthritis (1.6%). At the time of data collection, 278 patients (91.0%) were in remission, whereas 27 patients (9.0%) had active disease. Macrophage activation syndrome developed in 12 of the 29 (41.0%) systemic arthritis. Uveitis was noted in 32 (10.0%) patients. Biological agents were administered in 142 of the patients. CONCLUSIONS The available data indicate that JIA as a whole is a heterogeneous disease with significant variability in course and long-term outcome. As such, each patient should be evaluated according to his / her disease subtype.
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Affiliation(s)
- Semanur Ozdel
- Departments of, Department of, Pediatric Rheumatology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Esra Baglan
- Departments of, Department of, Pediatric Rheumatology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Evrim Kargın Cakıcı
- Departments of, Department of, Pediatric Rheumatology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Fatma Yazılıtas
- Departments of, Department of, Pediatric Rheumatology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Hüsniye Yücel
- Department of, Pediatrics, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Saliha Senel
- Department of, Pediatrics, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Mehmet Bulbul
- Departments of, Department of, Pediatric Rheumatology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
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Abstract
Macrophage activation syndrome (MAS) is a severe, potentially life-threatening complication of systemic juvenile idiopathic arthritis (s-JIA). An immunological feature is the excessive activation and proliferation of T lymphocytes and macrophages. Massive hypercytokinemia is strongly associated with its pathogenesis, particularly the overproduction of interleukin (IL)-1, IL-6 and IL-18; interferon (IFN)-γ; and tumor necrosis factor (TNF)-α. Furthermore, heterozygous mutations in causative genes for primary hemophagocytic lymphohistiocytosis and in vivo exposure to highly elevated levels of IL-6 and IL-18 might induce natural killer cell dysfunction and decrease their numbers, respectively. A proper diagnosis is important to begin appropriate therapeutic interventions and change an unfavorable prognosis. The 2016 ACR/EULAR classification criteria for MAS have a high diagnostic performance; however, the diagnostic sensitivity for onset is relatively low. Therefore, careful monitoring of laboratory values during the course of MAS is necessary to diagnose it early in s-JIA. Further studies on the diagnosis and monitoring of disease activity using serum cytokine profile and a targeted cytokine strategy are required.
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Affiliation(s)
- Masaki Shimizu
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Pascarella A, Bracaglia C, Caiello I, Arduini A, Moneta GM, Rossi MN, Matteo V, Pardeo M, De Benedetti F, Prencipe G. Monocytes From Patients With Macrophage Activation Syndrome and Secondary Hemophagocytic Lymphohistiocytosis Are Hyperresponsive to Interferon Gamma. Front Immunol 2021; 12:663329. [PMID: 33815425 PMCID: PMC8010171 DOI: 10.3389/fimmu.2021.663329] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/01/2021] [Indexed: 12/28/2022] Open
Abstract
Objective To investigate the activation of the IFNγ signaling pathway in monocytes of patients with secondary hemophagocytic lymphohistiocytosis (sHLH)/macrophage activation syndrome (MAS) and to evaluate whether levels of phosphorylated STAT1 represent a biomarker for the identification of patients at early stages of the disease. Methods Fresh whole blood samples from pediatric patients with active sHLH/MAS, not receiving (n=10) and receiving glucocorticoids (n=14) at time of sampling, were prospectively collected. As disease control groups, patients with active systemic juvenile idiopathic arthritis (sJIA) without MAS, patients with sHLH/MAS in remission and patients with other rheumatic diseases were also sampled. Whole blood cells were left unstimulated or stimulated with increasing concentrations of IFNγ for 10 minutes and the intracellular Tyrosine (701)-phosphorylated STAT1 (pSTAT1) levels were evaluated in monocytes by flow cytometry. Results Monocytes from untreated sHLH/MAS patients showed significantly higher basal levels of pSTAT1 compared to those observed in monocytes from glucocorticoid-treated sHLH/MAS patients and from all the other disease controls. In addition, a significant increase in responsiveness to IFNγ, as assessed by increased levels of pSTAT1 following ex vivo stimulation, was observed in monocytes from untreated sHLH/MAS patients. pSTAT1 levels in monocytes distinguished patients with sHLH/MAS not treated with glucocorticoids from patients with active sJIA or with other rheumatic diseases [AUC, 0.93; 95% confidence interval 0.85-1.00, p<0.001]. Statistically significant correlations between IFNG mRNA levels in whole blood cells, circulating IFNγ levels and pSTAT1 levels in sHLH/MAS monocytes were found. Conclusion Our data demonstrating higher basal levels of pSTAT1 as well as a hyperreactivity to IFNγ stimulation in monocytes from patients with sHLH/MAS point to perturbations in the activation of downstream IFNγ signaling pathway as a contributor to the hyperinflammation occurring in these patients. Finally, the observation that glucocorticoids affect pSTAT1 levels in vivo, makes it difficult to consider the measurement of pSTAT1 levels as a biomarker to identify patients at early stages of sHLH/MAS in clinical practice.
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Affiliation(s)
- Antonia Pascarella
- Division of Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Claudia Bracaglia
- Laboratory of Immuno-Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Ivan Caiello
- Division of Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Alessia Arduini
- Laboratory of Immuno-Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Gian Marco Moneta
- Division of Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | | | - Valentina Matteo
- Division of Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Manuela Pardeo
- Laboratory of Immuno-Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Fabrizio De Benedetti
- Laboratory of Immuno-Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Giusi Prencipe
- Division of Rheumatology, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
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Tang S, Li S, Zheng S, Ding Y, Zhu D, Sun C, Hu Y, Qiao J, Fang H. Understanding of cytokines and targeted therapy in macrophage activation syndrome. Semin Arthritis Rheum 2020; 51:198-210. [PMID: 33385860 DOI: 10.1016/j.semarthrit.2020.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/01/2020] [Accepted: 12/21/2020] [Indexed: 12/29/2022]
Abstract
Macrophage activation syndrome (MAS) is a potentially life-threatening complication of systemic autoinflammatory/autoimmune diseases, generally systemic juvenile idiopathic arthritis and adult-onset Still's disease. It is characterized by an excessive proliferation of macrophages and T lymphocytes. Recent research revealed that cytokine storm with elevated pro-inflammatory cytokines, including IFN-γ, IL-18, and IL-6, may be central to the pathogenesis of MAS. Though the mainstream of MAS treatment remains corticosteroids and cyclosporine, targeted therapies with anti-cytokine biologics are reported to be promising for controlling systemic inflammation in MAS.
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Affiliation(s)
- Shunli Tang
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Sheng Li
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Siting Zheng
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuwei Ding
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Dingxian Zhu
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chuanyin Sun
- Department of Rheumatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yongxian Hu
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jianjun Qiao
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
| | - Hong Fang
- Department of Dermatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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Comparison of serum biomarkers for the diagnosis of macrophage activation syndrome complicating systemic juvenile idiopathic arthritis during tocilizumab therapy. Pediatr Res 2020; 88:934-939. [PMID: 32184444 DOI: 10.1038/s41390-020-0843-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/28/2020] [Accepted: 02/08/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND To compare the accuracy of serum biomarkers for the diagnosis of macrophage activation syndrome (MAS) complicating systemic juvenile idiopathic arthritis (s-JIA) during tocilizumab therapy. METHODS Serum cytokine levels of neopterin, IL-18, C-X-C motif chemokine ligand 9, soluble tumor necrosis factor receptor (sTNFR)-I, and sTNFR-II were determined by enzyme-linked immunosorbent assay in 36 patients with MAS complicating s-JIA including 12 patients receiving tocilizumab. Furthermore, the serum sTNFR-II/I ratio was compared with the clinical features of MAS. RESULTS The levels of all serum cytokines at MAS diagnosis were significantly lower in the tocilizumab-treated group than in the tocilizumab-untreated group. In contrast, the serum sTNFR-II/I ratio at MAS diagnosis was comparable between the tocilizumab-treated and the tocilizumab-untreated groups. The receiver operating characteristic curve analysis revealed that the area under the curve and cut-off values of sTNFR-II/I ratio were 0.9722 and 4.71, respectively. The serum sTNFR-II/I ratio, which was significantly elevated in patients with MAS complicating s-JIA, was correlated positively with disease activity. CONCLUSIONS These findings suggest that the serum sTNFR-II/I ratio might be a useful indicator to evaluate disease activity in MAS complicating s-JIA and a useful diagnostic marker for the transition from active-phase s-JIA to MAS even in tocilizumab-treated patients. IMPACT This is the first study to analyze the role of tocilizumab in modifying the serum levels of biomarkers used for the diagnosis of MAS complicating s-JIA. We found the biomarker for the diagnosis of MAS complicating s-JIA during tocilizumab therapy. We hope our results might be useful for the development of a new criteria for the diagnosis of MAS complicating s-JIA in patients treated with tocilizumab in future.
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Krei JM, Møller HJ, Larsen JB. The role of interleukin-18 in the diagnosis and monitoring of hemophagocytic lymphohistiocytosis/macrophage activation syndrome - a systematic review. Clin Exp Immunol 2020; 203:174-182. [PMID: 33128796 DOI: 10.1111/cei.13543] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/30/2020] [Accepted: 10/21/2020] [Indexed: 12/22/2022] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening, hyperinflammatory disorder, characterized by multiorgan failure, fever and cytopenias. The diagnosis of HLH and its subtype Macrophage Activation Syndrome (MAS) remains a challenge. Interleukin 18 (IL-18) is emerging as a potential biomarker for HLH/MAS but is currently not a part of diagnostic criteria. This systematic review aimed to assess the potential role of IL-18 in the diagnosis and monitoring of HLH and MAS, and was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed and Embase were searched on 30 January 2020. Studies included all subtypes of HLH and a range of underlying disorders in both children and adults. A total of 14 studies were included. Generally, serum IL-18 was elevated in both primary and secondary HLH (> 1000 pg/ml) compared with other inflammatory conditions and with healthy individuals; thus, serum IL-18 may be able to discriminate between HLH and other inflammatory conditions. Significantly increased IL-18 (> 10 000 pg/ml) was also consistently described in MAS compared with other subtypes of HLH. The ability of IL-18 to distinguish MAS from systemic juvenile idiopathic arthritis (JIA) is less unambiguous, as IL-18 levels > 100 000 pg/ml were described in sJIA patients both with and without MAS. IL-18 may help to differentiate between HLH subtypes and other inflammatory conditions. As HLH and MAS are rare disorders, only few and relatively small studies exist on the subject. Larger, prospective multi-center studies are called for to assess the diagnostic precision of IL-18 for HLH and MAS.
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Affiliation(s)
- J M Krei
- Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark
| | - H J Møller
- Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - J B Larsen
- Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark
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Mizuta M, Shimizu M, Irabu H, Usami M, Inoue N, Nakagishi Y, Wada T, Yachie A. Comparison of serum cytokine profiles in macrophage activation syndrome complicating different background rheumatic diseases in children. Rheumatology (Oxford) 2020; 60:231-238. [DOI: 10.1093/rheumatology/keaa299] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 05/02/2020] [Indexed: 12/18/2022] Open
Abstract
Abstract
Objectives
To compare the cytokines involved in the development of macrophage activation syndrome (MAS) in different background rheumatic diseases and to identify serum biomarkers for MAS diagnosis.
Methods
Serum neopterin, IL-6, IL-18 and soluble TNF receptor (sTNFR) type I (sTNFR-I) and type II (sTNFR-II) levels were determined using ELISA in 12 patients with SLE, including five with MAS; 12 patients with JDM, including four with MAS; 75 patients with Kawasaki disease (KD), including six with MAS; and 179 patients with systemic JIA (s-JIA), including 43 with MAS. These results were compared with the clinical features of MAS.
Results
Serum neopterin, IL-18 and sTNFR-II levels were significantly higher during the MAS phase than during the active phase in patients with all diseases. Furthermore, serum sTNFR-I levels were significantly higher during the MAS phase than during the active phase in patients with SLE, KD and s-JIA. Receiver operating characteristic (ROC) curve analysis revealed that serum sTNFR-I levels for SLE, serum IL-18 levels for JDM, and serum sTNFR-II levels for KD and s-JIA had the highest areas under the ROC curve. Serum levels of these cytokines were significantly and positively correlated with serum ferritin levels.
Conclusions
Overproduction of IFN-γ, IL-18 and TNF-α might be closely related to the development of MAS. Serum levels of sTNFR-I for SLE, IL-18 for JDM, and sTNFR-II for KD and s-JIA might be useful diagnostic markers for the transition from active phase to MAS.
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Affiliation(s)
- Mao Mizuta
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
| | - Masaki Shimizu
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
| | - Hitoshi Irabu
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
| | - Masaaki Usami
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
| | - Natsumi Inoue
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
| | - Yasuo Nakagishi
- Department of Pediatric Rheumatology, Hyogo Prefectural Kobe Children’s Hospital, Kobe, Japan
| | - Taizo Wada
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
| | - Akihiro Yachie
- Department of Pediatrics, School of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa
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24
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Griffin G, Shenoi S, Hughes GC. Hemophagocytic lymphohistiocytosis: An update on pathogenesis, diagnosis, and therapy. Best Pract Res Clin Rheumatol 2020; 34:101515. [PMID: 32387063 DOI: 10.1016/j.berh.2020.101515] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a rare, life-threatening state of immune hyperactivation that arises in the setting of genetic mutations and infectious, inflammatory, or neoplastic triggers. Sustained, aberrant activation of cytotoxic CD8+ T cells and resultant inflammatory cytokine release are core pathogenic mechanisms. Key clinical features include high persistent fever, hepatosplenomegaly, blood cytopenia, elevated aminotransferase and ferritin levels, and coagulopathy. HLH is likely under-recognized, and mortality remains high, especially in adults; thus, prompt diagnosis and treatment are essential. Familial forms of HLH are currently treated with chemotherapy as a bridge to hematopoietic stem cell transplantation. HLH occurring in rheumatic disease (macrophage activation syndrome) is treated with glucocorticoids, IL-1 blockade, or cyclosporine A. In other forms of HLH, addressing the underlying trigger is essential. There remains a pressing need for more sensitive, context-specific diagnostic tools. Safer, more effective therapies will arise with improved understanding of the cellular and molecular mechanisms of HLH.
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Affiliation(s)
- Georgia Griffin
- Division of Rheumatology, Seattle Children's Hospital, Seattle, WA, USA.
| | - Susan Shenoi
- Division of Rheumatology, Seattle Children's Hospital, Seattle, WA, USA
| | - Grant C Hughes
- Division of Rheumatology, University of Washington, Seattle, WA, USA
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25
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Shimizu M, Mizuta M, Okamoto N, Yasumi T, Iwata N, Umebayashi H, Okura Y, Kinjo N, Kubota T, Nakagishi Y, Nishimura K, Mohri M, Yashiro M, Yasumura J, Wakiguchi H, Mori M. Tocilizumab modifies clinical and laboratory features of macrophage activation syndrome complicating systemic juvenile idiopathic arthritis. Pediatr Rheumatol Online J 2020; 18:2. [PMID: 31924225 PMCID: PMC6954608 DOI: 10.1186/s12969-020-0399-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/06/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND This study aimed to determine the influence of tocilizumab (TCZ) in modifying the clinical and laboratory features of macrophage activation syndrome (MAS) complicating systemic juvenile idiopathic arthritis (s-JIA). Furthermore, we assessed the performance of the 2016 MAS classification criteria for patients with s-JIA-associated MAS while treated with TCZ. METHODS A panel of 15 pediatric rheumatologists conducted a combination of expert consensus and analysis of real patient data. Clinical and laboratory features of s-JIA-associated MAS in 12 TCZ-treated patients and 18 untreated patients were evaluated. Possible MAS was defined as having characteristic laboratory features but lack of clinical features of MAS, or atypical MAS, or early treatment that prevented full-blown MAS. RESULTS Clinically, the TCZ-treated patients with s-JIA-associated MAS were less likely febrile and had significantly lower ferritin, triglyceride, and CRP levels than the untreated patients with s-JIA-associated MAS. Other laboratory features of MAS including lower platelet counts and lower fibrinogen were more pronounced in TCZ-treated patients. The TCZ-treated patients with s-JIA-associated MAS were less likely to be classified as MAS based on the MAS classification criteria (25% vs 83.3%, p < 0.01). This is ascribed to the absence of fever or insufficient ferritin elevation, compared with the untreated patients. CONCLUSION TCZ could modify the clinical and laboratory features of s-JIA-associated MAS. When evaluating the s-JIA patients while treated with TCZ, it is not applicable to use MAS classification criteria. Care must be taken to not underdiagnose MAS based on the MAS classification criteria.
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Affiliation(s)
- Masaki Shimizu
- Department of Pediatrics, Graduate School of Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8641, Japan.
| | - Mao Mizuta
- 0000 0001 2308 3329grid.9707.9Department of Pediatrics, Graduate School of Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8641 Japan
| | - Nami Okamoto
- 0000 0001 2109 9431grid.444883.7Department of Pediatrics, Osaka Medical College, Takatsuki, Japan
| | - Takahiro Yasumi
- 0000 0004 0372 2033grid.258799.8Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Naomi Iwata
- Department of Immunology and Infectious Diseases, Aichi Children’s Health and Medical Center, Obu, Japan
| | - Hiroaki Umebayashi
- 0000 0004 0471 4457grid.415988.9Department of Rheumatics, Miyagi Children’s Hospital, Sendai, Japan
| | - Yuka Okura
- 0000 0004 1771 5774grid.417164.1Department of Pediatrics, KKR Sapporo Medical Center, Sapporo, Japan
| | - Noriko Kinjo
- 0000 0001 0685 5104grid.267625.2Department of Pediatrics, Faculty of Medicine, University of the Ryukyus, Nakagami-gun, Japan
| | - Tomohiro Kubota
- 0000 0001 1167 1801grid.258333.cDepartment of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yasuo Nakagishi
- grid.415413.6Department of Pediatric Rheumatology, Hyogo Prefectural Kobe Children’s Hospital, Kobe, Japan
| | - Kenichi Nishimura
- 0000 0001 1033 6139grid.268441.dDepartment of Pediatrics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Mariko Mohri
- 0000 0001 1014 9130grid.265073.5Department of Lifetime Clinical Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masato Yashiro
- 0000 0004 0631 9477grid.412342.2Department of Pediatrics, Okayama University Hospital, Okayama, Japan
| | - Junko Yasumura
- 0000 0000 8711 3200grid.257022.0Department of Pediatrics, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima, Japan
| | - Hiroyuki Wakiguchi
- 0000 0001 0660 7960grid.268397.1Department of Pediatrics, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Masaaki Mori
- 0000 0001 1014 9130grid.265073.5Department of Lifetime Clinical Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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26
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Nikiforow S, Berliner N. To "Lump" or to "Split" in Macrophage Activation Syndrome and Hemophagocytic Lymphohistiocytosis. Arthritis Rheumatol 2019; 72:206-209. [PMID: 31524337 DOI: 10.1002/art.41106] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 09/10/2019] [Indexed: 12/14/2022]
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