Abstract
Steroid-sensitive nephrotic syndrome (SSNS) is the most common form of nephrotic syndrome in childhood. Cases with the familial occurrence of SSNS suggest that genetics may play a role in the disease. Human leucocyte antigen (HLA) alleles have been associated with SSNS. We present genetic findings in nine families (44 participants), each with at least two affected siblings. A total of 19 patients were affected with familial SSNS. Six of nine families showed linkage to markers on chromosome 6p (27.29–33.97 Mbp) (Hg19), especially to markers D6S1629 and D6S1560 on HLA dense region in this location. Interestingly, we also found linkage of disease phenotype of familial SSNS on chromosome 15 (91.7–96.9 Mbp) (Hg19) with a logarithm of odds (LOD) score Z = 3.02.
Conclusion: Our findings confirm the linkage of HLA markers on chromosome 6, which strengthens the association of HLA alleles in SSNS.
What is Known: • Human leukocyte antigen (HLA) alleles have been associated with idiopathic steroid-sensitive nephrotic syndrome (SSNS). Only few studies have investigated the association between HLA alleles and familial SSNS. | |
What is New: • We present evidence of linkage of familial SSNS to chromosome 6p (27.29–33.97 Mbp) (Hg19), especially to markers D6S1629 and D6S1560 on HLA dense region in this location. We also found linkage of the disease phenotype of familial SSNS on chromosome 15 (91.7–96.9 Mbp) (Hg19) with a logarithm of odds (LOD) score of Z = 3.02 following autosomal recessive inheritance pattern. |
Abbreviations
- AD:
-
Autosomal dominant
- AR:
-
Autosomal recessive
- CNVs:
-
Copy number variations
- EDTA:
-
Ethylenediaminetetraacetic acid
- HLA:
-
Human leukocyte antigen
- INS:
-
Idiopathic nephrotic syndrome
- LOD:
-
The logarithm of odds
- LOH:
-
Loss of heterozygosity
- Mbp:
-
Megabase pair
- OMIM:
-
Online Mendelian Inheritance in Man
- SNP:
-
Single-nucleotide polymorphism
- SRNS:
-
Steroid-resistant nephrotic syndrome
- SSNS:
-
Steroid-sensitive nephrotic syndrome
- UCSC:
-
University of California, Santa Cruz (genome browser).
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Acknowledgments
We are sincerely grateful for the contribution of the project participants. We thank Mette Nyegaard (Associate Prof., Aarhus University) for insightful correspondence on genotype-phenotype correlations in this study. We also thank Annemette Friis Mikkelsen and Jiri Dusek for their skillful assistance. We apologize to those authors whose work could not be described in this article due to space limitations.
Funding
The project was supported by funds from International Mobility Ph.D. Stipend, Faculty of Health, Aarhus University, Denmark, awarded to Shivani Joshi; Department of Clinical Medicine, Aarhus University, Denmark; and Helen of Ejnar Bjørnows Fond, Denmark.
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All authors contributed to the study conception and design. Trine Korsgaard drafted the manuscript and critically revised important essential content. Study conception, design, material preparation, data collection and analysis, and interpretation were performed by Trine Korsgaard, Shivani Joshi, Rene F. Andersen, Kristina Moeller, Tomás Seemann, Ludmila Podracka, Hans Eiberg, and Søren Rittig. All authors have equally contributed in editing the manuscript and approving the final manuscript.
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The research protocol was approved by the Central Denmark Region Committees of Biomedical Research Ethics (M-20110080) and the Danish Data Protection Agency (2011-41-6450). Written consent was obtained from adults and parents of minor participants.
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Korsgaard, T., Joshi, S., Andersen, R.F. et al. Human leukocyte antigen association with familial steroid-sensitive nephrotic syndrome. Eur J Pediatr 179, 1481–1486 (2020). https://doi.org/10.1007/s00431-020-03634-3
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DOI: https://doi.org/10.1007/s00431-020-03634-3