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Sanaksenaho G, Mutanen A, Godbole N, Hukkinen M, Merras-Salmio L, Kivisaari R, Kyrönlahti A, Pihlajoki M, Lohi J, Heikinheimo M, Pakarinen MP. Compromised duodenal mucosal integrity in children with short bowel syndrome after adaptation to enteral autonomy. J Pediatr Surg 2021; 56:966-974. [PMID: 33131778 DOI: 10.1016/j.jpedsurg.2020.09.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/23/2020] [Accepted: 09/21/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Intestinal adaptation has been extensively studied experimentally, but very limited data is available on human subjects. In this study we assessed intestinal adaption in humans with short bowel syndrome (SBS). METHODS We comparatively evaluated mucosal hyperplasia, inflammation, barrier function and nutrient transport using histology, immunohistochemistry and qPCR for selected 52 key genes in duodenal biopsies obtained from children with SBS after weaning off parenteral nutrition (n = 33), and matched controls without intestinal pathology (n = 12). Small bowel dilatation was assessed from contrast small bowel series. RESULTS Duodenal mucosa of SBS children showed increased histologic inflammation of lamina propria (p = 0.033) and mucosal mRNA expression of tumor necrosis factor (p = 0.027), transforming growth factor (TGF)-β2 (p = 0.006) and caveolin-1 (CAV1; p = 0.001). Villus height, crypt depth, enterocyte proliferation, apoptosis and expression of proliferation and nutrient transport genes remained unchanged. Pathologic small bowel dilatation reduced crypt depth (p = 0.045) and downregulated mRNA expression of interleukin (IL)-6 by three-fold (p = 0.008), while correlating negatively with IL6 (r = -0.609, p = 0.004). Loss of ileocecal valve (ICV) upregulated mRNA expression of toll-like receptor 4 (TLR4), TGF-β1, CAV1, several apoptosis regulating genes, and mRNA expression of zonulin (p < 0.05 for all). CONCLUSIONS Despite successful adaptation to enteral autonomy, duodenal mucosa of SBS children displayed histologic and molecular signs of abnormal inflammation and regulation of epithelial permeability, whereas no structural or molecular signs of adaptive hyperplasia or enhanced nutrient transport were observed. Excessive dilatation of the remaining small bowel paralleled impaired duodenal crypt homeostasis, while absence of ICV modified regulation of mucosal inflammation, regeneration and permeability. LEVEL OF EVIDENCE II.
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Affiliation(s)
- Galina Sanaksenaho
- Division of Pediatric Surgery, Pediatric Liver and Gut Research Group, Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Annika Mutanen
- Division of Pediatric Surgery, Pediatric Liver and Gut Research Group, Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Nimish Godbole
- Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Maria Hukkinen
- Division of Pediatric Surgery, Pediatric Liver and Gut Research Group, Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Laura Merras-Salmio
- Department of Pediatric Gastroenterology, Pediatric Liver and Gut Research Group, Children's Hospital, Pediatric Research Centre, University of Helsinki, Helsinki University Hospital, Helsinki, Finland
| | - Reetta Kivisaari
- HUS Medical Imaging Center, Children's Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Antti Kyrönlahti
- Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Marjut Pihlajoki
- Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jouko Lohi
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Markku Heikinheimo
- Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Mikko P Pakarinen
- Division of Pediatric Surgery, Pediatric Liver and Gut Research Group, Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
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