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- Title
The OSMR Gene Is Involved in Hirschsprung Associated Enterocolitis Susceptibility through an Altered Downstream Signaling.
- Authors
Bachetti, Tiziana; Rosamilia, Francesca; Bartolucci, Martina; Santamaria, Giuseppe; Mosconi, Manuela; Sartori, Serenella; De Filippo, Maria Rosaria; Di Duca, Marco; Obino, Valentina; Avanzini, Stefano; Mavilio, Domenico; Candiani, Simona; Petretto, Andrea; Pini Prato, Alessio; Ceccherini, Isabella; Lantieri, Francesca
- Abstract
Hirschsprung (HSCR) Associated Enterocolitis (HAEC) is a common life-threatening complication in HSCR. HAEC is suggested to be due to a loss of gut homeostasis caused by impairment of immune system, barrier defense, and microbiome, likely related to genetic causes. No gene has been claimed to contribute to HAEC occurrence, yet. Genetic investigation of HAEC by Whole-Exome Sequencing (WES) on 24 HSCR patients affected (HAEC) or not affected (HSCR-only) by enterocolitis and replication of results on a larger panel of patients allowed the identification of the HAEC susceptibility variant p.H187Q in the Oncostatin-M receptor (OSMR) gene (14.6% in HAEC and 5.1% in HSCR-only, p = 0.0024). Proteomic analysis on the lymphoblastoid cell lines from one HAEC patient homozygote for this variant and one HAEC patient not carrying the variant revealed two well distinct clusters of proteins significantly up or downregulated upon OSM stimulation. A marked enrichment in immune response pathways (q < 0.0001) was shown in the HAEC H187 cell line, while proteins upregulated in the HAEC Q187 lymphoblasts sustained pathways likely involved in pathogen infection and inflammation. In conclusion, OSMR p.H187Q is an HAEC susceptibility variant and perturbates the downstream signaling cascade necessary for the gut immune response and homeostasis maintenance.
- Subjects
ENTEROCOLITIS; LYMPHOBLASTOID cell lines; EXOMES; HOMEOSTASIS; GENES; IMMUNE response
- Publication
International Journal of Molecular Sciences, 2021, Vol 22, Issue 8, p3831
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms22083831