Cited by 207Autoimmune and Inflammatory Disorders ResearchImmunodeficiency and Autoimmune DisordersInflammasome and immune disorders

Whole‐Exome Sequencing Reveals Overlap Between Macrophage Activation Syndrome in Systemic Juvenile Idiopathic Arthritis and Familial Hemophagocytic Lymphohistiocytosis

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Kaufman, Kenneth M., Linghu, Bolan, Szustakowski, Joseph D., Husami, Ammar, Yang, Fan, Zhang, Kejian, Filipovich, Alexandra H., Fall, Ndate +3 more·2014·Arthritis & Rheumatology

Abstract

Objective: Macrophage activation syndrome (MAS), a life‐threatening complication of systemic juvenile idiopathic arthritis (JIA), resembles familial hemophagocytic lymphohistiocytosis (HLH), a constellation of autosomal‐recessive immune disorders resulting from deficiency in cytolytic pathway proteins. We undertook this study to test our hypothesis that MAS predisposition in systemic JIA could be attributed to rare gene sequence variants affecting the cytotolytic pathway. Methods: Whole‐exome sequencing was used in 14 patients with systemic JIA and MAS and in their parents to identify protein‐altering single‐nucleotide polymorphisms/indels in known HLH‐associated genes. To discover new candidate genes, the entire whole‐exome sequencing data were filtered to identify protein‐altering, rare recessive homozygous, compound heterozygous, and de novo variants with the potential to affect the cytolytic pathway. Results: Heterozygous protein‐altering rare variants in the known genes (LYST,MUNC13‐4, and STXBP2) were found in 5 of 14 patients with systemic JIA and MAS (35.7%). This was in contrast to only 4 variants in 4 of 29 patients with systemic JIA without MAS (13.8%). Homozygosity and compound heterozygosity analysis applied to the entire whole‐exome sequencing data in systemic JIA/MAS revealed 3 recessive pairs in 3 genes and compound heterozygotes in 73 genes. We also identified 20 heterozygous rare protein‐altering variants that occurred in at least 2 patients. Many of the identified genes encoded proteins with a role in actin and microtubule reorganization and vesicle‐mediated transport. “Cellular assembly and organization” was the top cellular function category based on Ingenuity Pathways Analysis (P < 3.10 × 10−5). Conclusion: Whole‐exome sequencing performed in patients with systemic JIA and MAS identified rare protein‐altering variants in known HLH‐associated genes as well as in new candidate genes.

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  • In patients with secondary HLH, viral, autoimmune, or neoplastic disorders trigger cytokine storm, and such patients often have heterozygous polymorphisms in the same genes altered in primary HLH.

    “In patients with secondary HLH, viral, autoimmune, or neoplastic disorders trigger cytokine storm, and such patients often have heterozygous polymorphisms in the same genes that are altered in primary HLH.65,74”

    From Cytokine storm (2020) · cites this paper as [74]

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Authors
Kaufman, K. M., Linghu, B., Szustakowski, J. D., Husami, A., Yang, F., Zhang, K., Filipovich, A. H., Fall, N., Harley, J. B., Nirmala, N. R., & Grom, A. A.
Affiliations
  • Cincinnati Children's Hospital Medical Center (US)
  • Novartis Institutes for BioMedical Research Cambridge Massachusetts
Venue
Arthritis & Rheumatology
Publisher
Wiley
Published
2014-11-25
Volume
66
Issue
12
Pages
3486-3495
ISSN
  • 2326-5191 (ISSN-L)
  • 2326-5205
OpenAlex
W1908769349
Cited by
207
References
51
Citations by year
2026: 8 · 2025: 13 · 2024: 23 · 2023: 12 · 2022: 14 · 2021: 21 · 2020: 17 · 2019: 32 · 2018: 12 · 2017: 14 · 2016: 17 · 2015: 21 · 2014: 2
FWCI
12.77
Type
journal article
Language
en
Open access
Locations
  • Arthritis & Rheumatology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • The Novartis Repository (Novartis) (submittedVersion)
Funders
National Institutes of Health (RO1-AR059049)
Topics
  • Health Sciences › Medicine › Hematology › Autoimmune and Inflammatory Disorders Research
  • Life Sciences › Immunology and Microbiology › Immunology › Immunodeficiency and Autoimmune Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
macrophage activation syndrome, systemic juvenile idiopathic arthritis, familial hemophagocytic lymphohistiocytosis, rare variants, compound heterozygosity, homozygosity, de novo mutations, LYST, Munc13-4, STXBP2, vesicle trafficking, candidate genes
MeSH terms
Adolescent, Arthritis, Juvenile, Child, Child, Preschool, Female, Genotype, Humans, Infant, Male, Mutation, Parents, Sequence Analysis, DNA, Genetic Predisposition to Disease, Polymorphism, Single Nucleotide, Lymphohistiocytosis, Hemophagocytic, Macrophage Activation Syndrome, Exome

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