PUBLICATION
Size matters: Large copy number losses in Hirschsprung disease patients reveal genes involved in enteric nervous system development
- Authors
- Kuil, L.E., MacKenzie, K.C., Tang, C.S., Windster, J.D., Le, T.L., Karim, A., de Graaf, B.M., van der Helm, R., van Bever, Y., Sloots, C.E.J., Meeussen, C., Tibboel, D., de Klein, A., Wijnen, R.M.H., Amiel, J., Lyonnet, S., Garcia-Barcelo, M.M., Tam, P.K.H., Alves, M.M., Brooks, A.S., Hofstra, R.M.W., Brosens, E.
- ID
- ZDB-PUB-210807-14
- Date
- 2021
- Source
- PLoS Genetics 17: e1009698 (Journal)
- Registered Authors
- Kuil, Laura
- Keywords
- none
- MeSH Terms
-
- Animals
- Case-Control Studies
- DNA Copy Number Variations*
- Disease Models, Animal
- Enteric Nervous System/chemistry
- Enteric Nervous System/growth & development*
- Epistasis, Genetic
- Gene Regulatory Networks*
- Genetic Predisposition to Disease
- Haplotypes
- Hirschsprung Disease/genetics*
- Humans
- Mice
- Zebrafish
- PubMed
- 34358225 Full text @ PLoS Genet.
Citation
Kuil, L.E., MacKenzie, K.C., Tang, C.S., Windster, J.D., Le, T.L., Karim, A., de Graaf, B.M., van der Helm, R., van Bever, Y., Sloots, C.E.J., Meeussen, C., Tibboel, D., de Klein, A., Wijnen, R.M.H., Amiel, J., Lyonnet, S., Garcia-Barcelo, M.M., Tam, P.K.H., Alves, M.M., Brooks, A.S., Hofstra, R.M.W., Brosens, E. (2021) Size matters: Large copy number losses in Hirschsprung disease patients reveal genes involved in enteric nervous system development. PLoS Genetics. 17:e1009698.
Abstract
Hirschsprung disease (HSCR) is a complex genetic disease characterized by absence of ganglia in the intestine. HSCR etiology can be explained by a unique combination of genetic alterations: rare coding variants, predisposing haplotypes and Copy Number Variation (CNV). Approximately 18% of patients have additional anatomical malformations or neurological symptoms (HSCR-AAM). Pinpointing the responsible culprits within a CNV is challenging as often many genes are affected. Therefore, we selected candidate genes based on gene enrichment strategies using mouse enteric nervous system transcriptomes and constraint metrics. Next, we used a zebrafish model to investigate whether loss of these genes affects enteric neuron development in vivo. This study included three groups of patients, two groups without coding variants in disease associated genes: HSCR-AAM and HSCR patients without associated anomalies (HSCR-isolated). The third group consisted of all HSCR patients in which a confirmed pathogenic rare coding variant was identified. We compared these patient groups to unaffected controls. Predisposing haplotypes were determined, confirming that every HSCR subgroup had increased contributions of predisposing haplotypes, but their contribution was highest in isolated HSCR patients without RET coding variants. CNV profiling proved that specifically HSCR-AAM patients had larger Copy Number (CN) losses. Gene enrichment strategies using mouse enteric nervous system transcriptomes and constraint metrics were used to determine plausible candidate genes located within CN losses. Validation in zebrafish using CRISPR/Cas9 targeting confirmed the contribution of UFD1L, TBX2, SLC8A1, and MAPK8 to ENS development. In addition, we revealed epistasis between reduced Ret and Gnl1 expression and between reduced Ret and Tubb5 expression in vivo. Rare large CN losses-often de novo-contribute to HSCR in HSCR-AAM patients. We proved the involvement of six genes in enteric nervous system development and Hirschsprung disease.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping