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Clinical, Immunological and Molecular Findings of 8 Patients With Typical and Atypical Severe Combined Immunodeficiency: Identification of 7 Novel Mutations by Whole Exome Sequencing Publisher Pubmed



Alizadeh Z1, 2 ; Fazlollahi MR1, 2 ; Mazinani M3 ; Badalzadeh M1, 2 ; Heydarlou H1, 2 ; Carapito R4, 5 ; Molitor A4, 5 ; De Oteyza ACG6, 7 ; Proietti M6, 7, 8 ; Bavani MS1, 2 ; Shariat M9 ; Fallahpour M10 ; Movahedi M9 ; Moradi L1, 2 Show All Authors
Authors
  1. Alizadeh Z1, 2
  2. Fazlollahi MR1, 2
  3. Mazinani M3
  4. Badalzadeh M1, 2
  5. Heydarlou H1, 2
  6. Carapito R4, 5
  7. Molitor A4, 5
  8. De Oteyza ACG6, 7
  9. Proietti M6, 7, 8
  10. Bavani MS1, 2
  11. Shariat M9
  12. Fallahpour M10
  13. Movahedi M9
  14. Moradi L1, 2
  15. Grimbacher B6, 7, 8
  16. Bahram S4, 5
  17. Pourpak Z1, 2

Source: Genes and Immunity Published:2023


Abstract

Severe combined immunodeficiency (SCID) is one of the severe inborn errors of the immune system associated with life-threatening infections. Variations in SCID phenotypes, especially atypical SCID, may cause a significant delay in diagnosis. Therefore, SCID patients need to receive an early diagnosis. Here, we describe the clinical manifestations and genetic results of four SCID and atypical SCID patients. All patients (4 males and 4 females) in early infancy presented with SCID phenotypes within 6 months of birth. The mutations include RAG2 (p.I273T,p.G44X), IL7R (p.F361WfsTer17), ADA (c.780+1G>A), JAK3 (p.Q228Ter), LIG4 (p.G428R), and LAT (p.Y207fsTer33), as well as a previously reported missense mutation in RAG1 (p.A444V). The second report of LAT deficiency in SCID patients is presented in this study. Moreover, all variants were confirmed in patients and their parents as a heterozygous state by Sanger sequencing. The results of our study expand the clinical and molecular spectrum associated with SCID and leaky SCID phenotypes and provide valuable information for the clinical management of the patients. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.
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