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X-Linked Tlr7 Deficiency Underlies Critical Covid-19 Pneumonia in a Male Patient With Ataxia-Telangiectasia Publisher Pubmed



Abolhassani H1, 2 ; Vosughimotlagh A3 ; Asano T4 ; Landegren N5, 6 ; Boisson B4, 7, 8 ; Delavari S2 ; Bastard P7, 8 ; Arandaguillen M6 ; Wang Y1 ; Zuo F1 ; Sardh F5, 6 ; Marcotte H9 ; Du L1 ; Zhang SY4 Show All Authors
Authors
  1. Abolhassani H1, 2
  2. Vosughimotlagh A3
  3. Asano T4
  4. Landegren N5, 6
  5. Boisson B4, 7, 8
  6. Delavari S2
  7. Bastard P7, 8
  8. Arandaguillen M6
  9. Wang Y1
  10. Zuo F1
  11. Sardh F5, 6
  12. Marcotte H9
  13. Du L1
  14. Zhang SY4
  15. Zhang Q4
  16. Rezaei N2
  17. Kampe O6, 10
  18. Casanova JL4, 7, 8, 11
  19. Hammarstrom L1
  20. Panhammarstrom Q1
Show Affiliations
Authors Affiliations
  1. 1. Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14183, Sweden
  2. 2. Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Pediatrics, North Khorasan University of Medical Sciences, Bojnurd, Iran
  4. 4. St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, United States
  5. 5. Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
  6. 6. Centre for Molecular Medicine, Department of Medicine (Solna), Karolinska Institute, Stockholm, Sweden
  7. 7. Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France
  8. 8. University of Paris, Imagine Institute, Paris, France
  9. 9. Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital Huddinge, Stockholm, Sweden
  10. 10. Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden
  11. 11. Howard Hughes Medical Institute, New York, NY, United States

Source: Journal of Clinical Immunology Published:2022


Abstract

Background: Coronavirus disease 2019 (COVID-19) exhibits a wide spectrum of clinical manifestations, ranging from asymptomatic to critical conditions. Understanding the mechanism underlying life-threatening COVID-19 is instrumental for disease prevention and treatment in individuals with a high risk. Objectives: We aimed to identify the genetic cause for critical COVID-19 pneumonia in a patient with a preexisting inborn error of immunity (IEI). Methods: Serum levels of specific antibodies against the virus and autoantibodies against type I interferons (IFNs) were measured. Whole exome sequencing was performed, and the impacts of candidate gene variants were investigated. We also evaluated 247 ataxia-telangiectasia (A-T) patients in the Iranian IEI registry. Results: We report a 7-year-old Iranian boy with a preexisting hyper IgM syndrome who developed critical COVID-19 pneumonia. IgM only specific COVID-19 immune response was detected but no autoantibodies against type I IFN were observed. A homozygous deleterious mutation in the ATM gene was identified, which together with his antibody deficiency, radiosensitivity, and neurological signs, established a diagnosis of A-T. Among the 247 A-T patients evaluated, 36 had SARS-CoV-2 infection, but all had mild symptoms or were asymptomatic except the index patient. A hemizygous deleterious mutation in the TLR7 gene was subsequently identified in the patient. Conclusions: We report a unique IEI patient with combined ATM and TLR7 deficiencies. The two genetic defects underlie A-T and critical COVID-19 in this patient, respectively. © 2021, The Author(s).
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