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- Title
Abnormal Scn1b and Fxyd1 gene expression in the pulled-through ganglionic colon may influence functional outcome in patients with Hirschsprung's disease.
- Authors
O'Donnell, Anne Marie; Nakamura, Hiroki; Tomuschat, Christian; Marayati, Naoum Fares; Puri, Prem
- Abstract
Purpose: Smooth muscle cells are electrically coupled to ICC and PDGFRα+ cells, to regulate smooth muscle contraction. Recent studies have reported that the voltage-gated sodium channel type 1β (Scn1b), and the chloride channel subunit, Fxyd1, are highly expressed by both ICC and PDGFRα+ cells in the mouse colon. We designed this study to investigate the expression of the Scn1b and Fxyd1 genes in the normal human colon and in HSCR.Methods: HSCR tissue specimens (n = 6) were collected at the time of pull-through surgery, while control samples were obtained at the time of colostomy closure in patients with imperforate anus (n = 6). qRT-PCR analysis was undertaken to quantify Scn1b and Fxyd1 gene expression, and immunolabelling of Scn1b and Fxyd1 proteins were visualized using confocal microscopy.Results: qRT-PCR analysis revealed significant downregulation of Scn1b and Fxyd1 genes in both aganglionic and ganglionic HSCR specimens compared to controls (p < 0.05). Confocal microscopy revealed a reduction in Scn1b and Fxyd1 protein expression in both aganglionic and ganglionic HSCR colon compared to controls.Conclusion: Scn1b and Fxyd1 expression was significantly downregulated in HSCR colon. These results add to mounting evidence suggesting that the pulled-through ganglionic segment of bowel in these patients is abnormal, despite the presence of ganglion cells.
- Subjects
HIRSCHSPRUNG'S disease; SMOOTH muscle contraction; SMOOTH muscle; CONFOCAL microscopy; SODIUM channels
- Publication
Pediatric Surgery International, 2019, Vol 35, Issue 1, p9
- ISSN
0179-0358
- Publication type
Article
- DOI
10.1007/s00383-018-4370-x