Abstract
Purpose
Severe combined immunodeficiencies (SCID) are a heterogeneous group of fatal genetic disorders, in which the immune response is severely impaired. SCID can be cured if diagnosed early. We aim to determine the incidence of clinically defined SCID cases, acquire data of reported cases and evaluate their possible prediction by newborn screening, before introduction of a general screening program in Germany.
Methods
The German Surveillance Unit for rare Paediatric Diseases (ESPED) prospectively queried the number of incident SCID cases in all German paediatric hospitals in 2014 and 2015. Inclusion criteria were (1) opportunistic or severe infections or clinical features associated with SCID (failure to thrive, lacking thymus or lymphatic tissue, dysregulation of the immune system, graft versus host reaction caused by maternal T cells), (2) dysfunctional T cell immunity or proof of maternal T cells and (3) exclusion of a secondary immunodeficiency such as human immunodeficiency virus (HIV) infection. In a capture-recapture analysis, cases were matched with cases reported to the European Society for Immunodeficiencies (ESID).
Results
Fifty-eight patients were initially reported to ESPED, 24 reports could be confirmed as SCID, 21 patients were less than 1 year old at time of diagnosis. One SCID case was reported to ESID only. The estimated incidence of SCID in Germany is 1.6/100,000 (1:62,500) per year in children less than 1 year of age. Most patients reported were symptomatic and mortality in regard to reported outcome was high (29% (6/22)). The majority of incident SCID cases were considered to be probably detectable by newborn screening.
Conclusions
SCID is a rare disease with significant mortality. Newborn screening may give the opportunity to improve the prognosis in a significant number of children with SCID.
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Acknowledgements
This project was initiated by the working group Arbeitsgemeinschaft Pädiatrische Immunologie (API). We thank Catharina Schütz (Dresden, Germany), Michael Albert (Munich, Germany) and Stephan Borte (Leipzig) for reviewing the manuscript.
We would like to thank DGKJ for supplying the ESPED fee (3000 Euro) and travel costs, Kirsten Mischke, Julia Schmelze from the Pediatric Registry for Stem Cell Transplantation (PRST) Hannover and Henrike Ritterbusch from the Centre for Chronic Immunodeficiency Freiburg, Sandra Steinmann as well as ESPED, Andrea Groth and Stefan Jurkschat for supporting this project. Patients for this study were in part revealed through the ESID Registry.
Funding
Documentation to this registry was supported by the Federal Ministry of Education and Research (BMBF grants 01GM0896, 01GM1111B, 01GM1517C, and 01EO1303).
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Ethics Statement
This study was approved by the ethics committee of the University of Essen in Essen, Germany (reference number 13-5651-BO). An informed consent by patients or their parents was not required by the ethics committees, since the acquired data were completely anonymous.
Conflict of Interest
Gerhard Kindle was partially funded by grants from the BMBF and ESID for the purpose of this research.
Sabine El-Helou was funded for her work in the German PID-NET registry by the Federal Ministry of Education and Research (BMBF: grant codes: 01GM0896, 01GM1111B and 01GM1517C), by the European Society for Immunodeficiencies (ESID), by the Care-for-Rare Foundation, by PROimmun e.V., and by a restricted grant from LFB.
The PRST is supported by the Deutsche Kinderkrebsstifung Grant No. DKS 2016.5 to K.-W. Sykora.
Tim Niehues receives travel reimbursements of the European Medicines Agency (EMA), the Pediatric Rheumatology JIR cohort (Lausanne, Switzerland), the Jeffrey Modell Foundation for Primary immunodeficiencies (New York, USA) and the PENTA group (Pediatric European Network Trial in AIDS) and author honoraria from uptodate.com (Waltham, Massachusetts, USA).
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Shai, S., Perez-Becker, R., Andres, O. et al. Incidence of SCID in Germany from 2014 to 2015 an ESPED* Survey on Behalf of the API*** Erhebungseinheit für Seltene Pädiatrische Erkrankungen in Deutschland (German Paediatric Surveillance Unit) ** Arbeitsgemeinschaft Pädiatrische Immunologie. J Clin Immunol 40, 708–717 (2020). https://doi.org/10.1007/s10875-020-00782-x
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DOI: https://doi.org/10.1007/s10875-020-00782-x