1
|
Li Q, Wang J. The Effect of Protein Nutritional Support on Inflammatory Bowel Disease and Its Potential Mechanisms. Nutrients 2024; 16:2302. [PMID: 39064745 PMCID: PMC11280054 DOI: 10.3390/nu16142302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/11/2024] [Accepted: 07/13/2024] [Indexed: 07/28/2024] Open
Abstract
Inflammatory bowel disease (IBD), a complex chronic inflammatory bowel disorder that includes Crohn's disease (CD) and Ulcerative Colitis (UC), has become a globally increasing health concern. Nutrition, as an important factor influencing the occurrence and development of IBD, has attracted more and more attention. As the most important nutrient, protein can not only provide energy and nutrition required by patients, but also help repair damaged intestinal tissue, enhance immunity, and thus alleviate inflammation. Numerous studies have shown that protein nutritional support plays a significant role in the treatment and remission of IBD. This article presents a comprehensive review of the pathogenesis of IBD and analyzes and summarizes the potential mechanisms of protein nutritional support in IBD. Additionally, it provides an overview of the clinical effects of protein nutritional support in IBD and its impact on clinical complications. Research findings reveal that protein nutritional support demonstrates significant benefits in improving clinical symptoms, reducing the risk of complications, and improving quality of life in IBD patients. Therefore, protein nutritional support is expected to provide a new approach for the treatment of IBD.
Collapse
Affiliation(s)
| | - Jing Wang
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing 100081, China;
| |
Collapse
|
2
|
Nowak JK, Dworacka M, Gubaj N, Dossimov A, Dossimov Z, Walkowiak J. Expression profiling of ileal mucosa in asthma reveals upregulation of innate immunity and genes characteristic of Paneth and goblet cells. Allergy Asthma Clin Immunol 2021; 17:82. [PMID: 34332619 PMCID: PMC8325823 DOI: 10.1186/s13223-021-00584-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 07/21/2021] [Indexed: 11/10/2022] Open
Abstract
Background The expression profiles of the intestinal mucosa have not been comprehensively investigated in asthma. We aimed to explore this in the Correlated Expression and Disease Association Research (CEDAR) patient cohort. Methods Differential expression analysis of ileal, transverse colon, and rectal biopsies were supplemented by a comparison of transcriptomes from platelets and leukocytes subsets, including CD4+, CD8+, CD14+, CD15+, and CD19+ cells. Asthma patients (n = 15) and controls (n = 15) had similar age (p = 0.967), body mass index (p = 0.870), similar numbers of females (80%) and smoking rates (13.3%). Results Significant differential expression was found in the ileum alone, and not in any other cell/tissue types. More genes were found to be overexpressed (1,150) than under-expressed (380). The most overexpressed genes included Fc Fragment of IgG Binding Protein (FCGBP, logFC = 3.01, pFDR = 0.015), Mucin 2 (MUC2, logFC = 2.78, pFDR = 0.015), and Alpha 1B Defensin (DEFA1B, logFC = 2.73, pFDR = 0.024). Gene ontology implicated the immune system, including interleukins 4 and 13, as well as antimicrobial peptides in this overexpression. There was concordance of gene over- (STAT1, XBP1) and underexpression (NELF, RARA) in asthma and Crohn’s disease ileum when our results were compared to another dataset (p = 3.66 × 10–7). Conclusion Ileal mucosa in asthma exhibits a specific transcriptomic profile, which includes the overexpression of innate immune genes, mostly characteristic of Paneth and goblet cells, in addition to other changes that may resemble Crohn’s disease. Supplementary Information The online version contains supplementary material available at 10.1186/s13223-021-00584-9.
Collapse
Affiliation(s)
- Jan K Nowak
- Department of Pediatric Gastroenterology and Metabolic Diseases, Poznan University of Medical Sciences, ul. Szpitalna 27/33, 60-572, Poznan, Poland.
| | - Marzena Dworacka
- Department of Pharmacology, Poznan University of Medical Sciences, Poznan, Poland
| | - Nazgul Gubaj
- Department of Pediatric Diseases No. 2, West Kazakhstan Marat Ospanov Medical University, Aktobe, Kazakhstan
| | - Arystan Dossimov
- Department of Pediatric Diseases No. 2, West Kazakhstan Marat Ospanov Medical University, Aktobe, Kazakhstan
| | - Zhumabek Dossimov
- Department of Pediatric Diseases No. 2, West Kazakhstan Marat Ospanov Medical University, Aktobe, Kazakhstan
| | - Jarosław Walkowiak
- Department of Pediatric Gastroenterology and Metabolic Diseases, Poznan University of Medical Sciences, ul. Szpitalna 27/33, 60-572, Poznan, Poland
| |
Collapse
|
3
|
Arpa G, Vanoli A, Grillo F, Fiocca R, Klersy C, Furlan D, Sessa F, Ardizzone S, Sampietro G, Macciomei MC, Nesi G, Tonelli F, Capella C, Latella G, Ciardi A, Caronna R, Lenti MV, Ciccocioppo R, Barresi V, Malvi D, D'Errico A, Rizzello F, Poggioli G, Mescoli C, Rugge M, Luinetti O, Paulli M, Di Sabatino A, Solcia E. Prognostic relevance and putative histogenetic role of cytokeratin 7 and MUC5AC expression in Crohn's disease-associated small bowel carcinoma. Virchows Arch 2021; 479:667-678. [PMID: 33963925 PMCID: PMC8516779 DOI: 10.1007/s00428-021-03109-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/28/2021] [Accepted: 04/21/2021] [Indexed: 01/27/2023]
Abstract
Most Crohn’s disease-associated small bowel carcinomas (CrD-SBCs) are diagnosed in advanced stage and have poor prognosis. To improve diagnosis and therapy, a better knowledge of tumour precancerous lesions, histotypes and prognostic factors is needed. We investigated histologically and immunohistochemically 52 CrD-SBCs and 51 small bowel carcinomas unrelated to inflammatory disease, together with their tumour-associated mucosa, looking for Crohn-selective changes. Histologic patterns and phenotypic markers potentially predictive of CrD-SBC histogenesis and prognosis were analysed. Cytokeratin 7 or MUC5AC-positive metaplastic changes were found in about half of investigated CrD-SBCs, significantly more frequently than in CrD-unrelated SBCs. They correlated with metaplastic changes of their associated mucosa, while being absent in normal ileal mucosa. Histologic patterns suggestive for progression of some cytokeratin 7 and/or MUC5AC-positive metaplastic lesions into cancer of the same phenotype were also observed. Patient survival analyses showed that tumour cytokeratin 7 or MUC5AC expression and non-cohesive histotype were adverse prognostic factors at univariable analysis, while cytokeratin 7 and non-cohesive histotype were also found to predict worse survival in stage- and age-inclusive multivariable analyses. Besides conventional dysplasia, hyperplasia-like non-conventional lesions were observed in CrD-SBC-associated mucosa, with patterns suggestive for a histogenetic link with adjacent cancer. In conclusion the cytokeratin 7 and/or MUC5AC-positive metaplastic foci and the non-conventional growths may have a role in cancer histogenesis, while tumour cytokeratin 7 and non-cohesive histotype may also predict poor patient survival. Present findings are worth being considered in future prospective histogenetic and clinical studies.
Collapse
Affiliation(s)
- Giovanni Arpa
- Unit of Anatomic Pathology, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS San Matteo Hospital, Via Carlo Forlanini 16 -, 27100, Pavia, Italy
| | - Alessandro Vanoli
- Unit of Anatomic Pathology, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS San Matteo Hospital, Via Carlo Forlanini 16 -, 27100, Pavia, Italy.
| | - Federica Grillo
- Pathology Unit, Department of Surgical and Diagnostic Sciences, University Hospital and Ospedale Policlinico San Martino IRCCS, Genova, Italy
| | - Roberto Fiocca
- Pathology Unit, Department of Surgical and Diagnostic Sciences, University Hospital and Ospedale Policlinico San Martino IRCCS, Genova, Italy
| | - Catherine Klersy
- Service of Clinical Epidemiology & Biometry, Fondazione IRCCS San Matteo Hospital, Pavia, Italy
| | - Daniela Furlan
- Anatomic Pathology Unit, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Fausto Sessa
- Anatomic Pathology Unit, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | | | | | | | - Gabriella Nesi
- Division of Pathological Anatomy, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - Francesco Tonelli
- Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - Carlo Capella
- Anatomic Pathology Unit, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Giovanni Latella
- Gastroenterology Unit, Department of Life and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Antonio Ciardi
- Department of Radiological, Oncological, Pathological Sciences, Umberto I Hospital, La Sapienza University, Rome, Italy
| | - Roberto Caronna
- Surgical Sciences, Umberto I Hospital, La Sapienza University, Rome, Italy
| | - Marco Vincenzo Lenti
- Department of Internal Medicine, Fondazione IRCCS San Matteo Hospital, University of Pavia, Pavia, Italy
| | - Rachele Ciccocioppo
- Gastroenterology Unit, Department of Medicine, AOUI Policlinico G.B. Rossi, University of Verona, Verona, Italy
| | - Valeria Barresi
- Section of Anatomical Pathology, Department of Diagnostics and Public Health, University and Hospital Trust of Verona, Verona, Italy
| | - Deborah Malvi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Institute of Oncology and Transplant Pathology, St. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Antonietta D'Errico
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Institute of Oncology and Transplant Pathology, St. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Fernando Rizzello
- Intestinal Chronic Bowel Disease Unit, Department of Medical and Surgical Sciences, Sant'Orsola Malpighi Hospital, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Gilberto Poggioli
- Surgery of the Alimentary Tract, Department of Medical and Surgical Sciences, Sant'Orsola - Malpighi Hospital, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Claudia Mescoli
- Pathology Unit, Department of Medicine DIMED, University of Padua, Padova, Italy
| | - Massimo Rugge
- Pathology Unit, Department of Medicine DIMED, University of Padua, Padova, Italy
| | - Ombretta Luinetti
- Unit of Anatomic Pathology, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS San Matteo Hospital, Via Carlo Forlanini 16 -, 27100, Pavia, Italy
| | - Marco Paulli
- Unit of Anatomic Pathology, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS San Matteo Hospital, Via Carlo Forlanini 16 -, 27100, Pavia, Italy
| | - Antonio Di Sabatino
- Department of Internal Medicine, Fondazione IRCCS San Matteo Hospital, University of Pavia, Pavia, Italy
| | - Enrico Solcia
- Unit of Anatomic Pathology, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS San Matteo Hospital, Via Carlo Forlanini 16 -, 27100, Pavia, Italy
| |
Collapse
|
4
|
Clinicopathologic Features and Diagnostic Implications of Pyloric Gland Metaplasia in Intestinal Specimens. Am J Surg Pathol 2021; 45:365-373. [PMID: 33105158 DOI: 10.1097/pas.0000000000001608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pyloric gland metaplasia (PGM) is a histopathologic change usually seen after inflammatory injury and, although described in association with inflammatory bowel disease (IBD) and particularly Crohn disease (CD), its significance is still debated. We evaluated long-term correlates of PGM in a large cohort of 601 intestinal specimens, 227 (37.8%) biopsies, and 374 (62.2%) resections, from 567 different patients, 328 (57.8%) male and 239 (42.2%) female, with a mean age of 43.4±15.8 years. During mean clinical follow-up of 83.5±48.1 months, 511 (90.1%) patients were diagnosed with IBD, 457 (89.4%) with CD, and 53 (10.4%) with ulcerative colitis. In multivariate analysis, IBD patients with PGM were younger (P<0.001) and more often had severely active inflammation (P=0.002) compared with non-IBD patients, whereas, among IBD patients, those with ulcerative colitis were more likely to have PGM in a biopsy (P<0.001) or in the colorectum (P=0.009), compared with CD patients. Kaplan-Meier analyses showed that incidental PGM in a biopsy was more likely to predict IBD in patients younger than 50 years (P<0.001) and those without a history of bowel surgery (P<0.001) and also more likely to signify CD in patients younger than 50 years (P=0.004), those without a history of bowel surgery (P=0.020), and when identified in the small intestine (P=0.032). In conclusion, intestinal PGM warrants a high suspicion for IBD and specifically CD, however, it should be interpreted with caution, especially in older patients or those with a history of prior intestinal surgery and in colorectal biopsies or specimens lacking severely active inflammation.
Collapse
|
5
|
Meditskou S, Grekou A, Toskas A, Papamitsou T, Miliaras D. Pyloric and foveolar type metaplasia are important diagnostic features in Crohn's disease that are frequently missed in routine pathology. Histol Histopathol 2019; 35:553-558. [PMID: 31538655 DOI: 10.14670/hh-18-167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pyloric type metaplasia (PYME) as evidence of chronic mucosal damage, is one of the main histopathological findings for diagnosing Crohn's Disease (CD) in terminal ileum biopsies, according to the latest guidelines but still frequently underdiagnosed in routine pathology. Foveolar metaplasia (FOME) changes in mucosa, another aspect of the chronic post -inflammatory Ulcer Associated Cell Lineage (UACL), have only been reported in a few cases. However, their clinical significance has not been investigated in depth except in pouchitis. The aim of this study was to investigate the importance of meticulous study of terminal ileum biopsies for the recognition of PYME/FOME as an adjunct finding helpful for the diagnosis of CD. In the present study, two experienced gastrointestinal pathologists, have reviewed 105 terminal ileum biopsies from 105 patients with CD, using a protocol of 15 sections on average per biopsy. In 21% (22/105) of cases PYME was recognized and in 4% (4/105) FOME was also present. PYME/FOME had not been detected in 83% of these cases in the original reports. FOME was also identified in terminal ileum biopsies, a feature not reported previously in CD. Conclusively, PYME/FOME can be easily missed in terminal ileum biopsies from patients with suspected or known CD unless a meticulous study of the histologic material is carried out combined with awareness of the pathologist about its importance.
Collapse
Affiliation(s)
- Soultana Meditskou
- Laboratory of Histology - Embryology, Aristotle University of Thessaloniki, Thessaloniki, Greece.,"Istodiagnostiki" Histopathology Laboratory, Thessaloniki, Greece
| | - Alexandra Grekou
- "Istodiagnostiki" Histopathology Laboratory, Thessaloniki, Greece
| | - Alexandros Toskas
- Laboratory of Histology - Embryology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Theodora Papamitsou
- Laboratory of Histology - Embryology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimosthenis Miliaras
- Laboratory of Histology - Embryology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| |
Collapse
|
6
|
Thorsvik S, van Beelen Granlund A, Svendsen TD, Bakke I, Røyset ES, Flo TH, Damås JK, Østvik AE, Bruland T, Sandvik AK. Ulcer-associated cell lineage expresses genes involved in regeneration and is hallmarked by high neutrophil gelatinase-associated lipocalin (NGAL) levels. J Pathol 2019; 248:316-325. [PMID: 30746716 PMCID: PMC6618036 DOI: 10.1002/path.5258] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/13/2019] [Accepted: 02/07/2019] [Indexed: 01/16/2023]
Abstract
Neutrophil gelatinase-associated lipocalin (NGAL), also known as Lipocalin 2, is an antimicrobial protein, encoded by the gene LCN2, strongly upregulated in inflammatory bowel disease (IBD) and a promising biomarker for IBD. Here we demonstrate that NGAL is highly expressed in all parts of pyloric metaplasia, also known as the ulcer-associated cell lineage (UACL), a metaplastic cell lineage suggested to play a role in wound healing in Crohn's disease (CD). We further show NGAL expression in regenerative intestinal crypts and in undifferentiated patient-derived colonoids. This indicates that NGAL is important in the tissue regeneration process. The remarkable overexpression of NGAL in UACL led us to explore the pathobiology of these cells by transcriptome-wide RNA sequencing. This study is, to our knowledge, the first to characterize the UACL at this level. Biopsies with UACL and inflamed non-UACL epithelium from the terminal ileum of CD patients and epithelium from healthy controls were laser capture microdissected for RNA sequencing. Among the 180 genes differentially expressed between UACL and control epithelium, the ten most-upregulated genes specific for UACL were MUC5AC, PGC, MUC6, MUC5B, LCN2, POU2AF1, MUC1, SDC3, IGFBP5, and SLC7A5. PDX1 was among the most upregulated in both UACL and inflamed non-UACL epithelium. Immunohistochemistry and iDisco 3D visualization was used to characterize UACL histo-morphologically, and to validate protein expression of 11 selected differentially expressed genes. Among these genes, LCN2, NOTCH2, PHLDA1, IGFBP5, SDC3, BPIFB1, and RCN1 have previously not been linked to UACL. Gene expression results were analyzed for functional implications using MetaCore, showing that differentially expressed genes are enriched for genes involved in cell migration and motility, and for biomarkers of gastrointestinal neoplasia. These results support a role for UACL as part of the reepithelialization process during and after destructive intestinal inflammation. © 2019 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
Collapse
Affiliation(s)
- Silje Thorsvik
- Centre of Molecular Inflammation Research, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Gastroenterology and Hepatology, St Olav's University Hospital, Trondheim, Norway
| | - Atle van Beelen Granlund
- Centre of Molecular Inflammation Research, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Tarjei D Svendsen
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ingunn Bakke
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Clinic of Medicine, St Olav's University Hospital, Trondheim, Norway
| | - Elin S Røyset
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Pathology, St Olav's University Hospital, Trondheim, Norway
| | - Trude H Flo
- Centre of Molecular Inflammation Research, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Jan K Damås
- Centre of Molecular Inflammation Research, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Infectious Diseases, St Olav's University Hospital, Trondheim, Norway
| | - Ann E Østvik
- Centre of Molecular Inflammation Research, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Gastroenterology and Hepatology, St Olav's University Hospital, Trondheim, Norway
| | - Torunn Bruland
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Clinic of Medicine, St Olav's University Hospital, Trondheim, Norway
| | - Arne K Sandvik
- Centre of Molecular Inflammation Research, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Gastroenterology and Hepatology, St Olav's University Hospital, Trondheim, Norway
| |
Collapse
|
7
|
Goldenring JR. Pyloric metaplasia, pseudopyloric metaplasia, ulcer-associated cell lineage and spasmolytic polypeptide-expressing metaplasia: reparative lineages in the gastrointestinal mucosa. J Pathol 2018; 245:132-137. [PMID: 29508389 DOI: 10.1002/path.5066] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 02/27/2018] [Accepted: 02/28/2018] [Indexed: 12/16/2022]
Abstract
The gastrointestinal mucosae provide a critical barrier between the external and internal milieu. Thus, damage to the mucosa requires an immediate response to provide appropriate wound closure and healing. Metaplastic lineages with phenotypes similar to the mucous glands of the distal stomach or Brunner's glands have been associated with various injurious scenarios in the stomach, small bowel, and colon. These lineages have been assigned various names including pyloric metaplasia, pseudopyloric metaplasia, ulcer-associated cell lineage (UACL), and spasmolytic polypeptide-expressing metaplasia (SPEM). A re-examination of the literature on these various forms of mucous cell metaplasia suggests that pyloric-type mucosal gland lineages may provide a ubiquitous response to mucosal injury throughout the gastrointestinal tract as well as in the pancreas, esophagus, and other mucosal surfaces. While the cellular origin of these putative reparative lineages likely varies in different regions of the gut, their final phenotypes may converge on a pyloric-type gland dedicated to mucous secretion. In addition to their healing properties in the setting of acute injury, these pyloric-type lineages may also represent precursors to neoplastic transitions in the face of chronic inflammatory influences. Further investigations are needed to determine how discrete molecular profiles relate to the origin and function of pyloric-type metaplasias previously described by histological characteristics in multiple epithelial mucosal systems in the setting of acute and chronic damage. Copyright © 2018 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- James R Goldenring
- Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA.,Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN, USA.,Vanderbilt Ingram Cancer Center, Nashville, TN, USA.,Nashville VA Medical Center, Nashville, TN, USA
| |
Collapse
|
8
|
Spenlé C, Lefebvre O, Lacroute J, Méchine-Neuville A, Barreau F, Blottière HM, Duclos B, Arnold C, Hussenet T, Hemmerlé J, Gullberg D, Kedinger M, Sorokin L, Orend G, Simon-Assmann P. The laminin response in inflammatory bowel disease: protection or malignancy? PLoS One 2014; 9:e111336. [PMID: 25347196 PMCID: PMC4210184 DOI: 10.1371/journal.pone.0111336] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 09/23/2014] [Indexed: 02/07/2023] Open
Abstract
Laminins (LM), basement membrane molecules and mediators of epithelial-stromal communication, are crucial in tissue homeostasis. Inflammatory Bowel Diseases (IBD) are multifactorial pathologies where the microenvironment and in particular LM play an important yet poorly understood role in tissue maintenance, and in cancer progression which represents an inherent risk of IBD. Here we showed first that in human IBD colonic samples and in murine colitis the LMα1 and LMα5 chains are specifically and ectopically overexpressed with a concomitant nuclear p53 accumulation. Linked to this observation, we provided a mechanism showing that p53 induces LMα1 expression at the promoter level by ChIP analysis and this was confirmed by knockdown in cell transfection experiments. To mimic the human disease, we induced colitis and colitis-associated cancer by chemical treatment (DSS) combined or not with a carcinogen (AOM) in transgenic mice overexpressing LMα1 or LMα5 specifically in the intestine. We demonstrated that high LMα1 or LMα5 expression decreased susceptibility towards experimentally DSS-induced colon inflammation as assessed by histological scoring and decrease of pro-inflammatory cytokines. Yet in a pro-oncogenic context, we showed that LM would favor tumorigenesis as revealed by enhanced tumor lesion formation in both LM transgenic mice. Altogether, our results showed that nuclear p53 and associated overexpression of LMα1 and LMα5 protect tissue from inflammation. But in a mutation setting, the same LM molecules favor progression of IBD into colitis-associated cancer. Our transgenic mice represent attractive new models to acquire knowledge about the paradoxical effect of LM that mediate either tissue reparation or cancer according to the microenvironment. In the early phases of IBD, reinforcing basement membrane stability/organization could be a promising therapeutic approach.
Collapse
Affiliation(s)
- Caroline Spenlé
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; LabEx Medalis, Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Olivier Lefebvre
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; LabEx Medalis, Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Joël Lacroute
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; Department of Gastroenterology, CHRU Hautepierre, Strasbourg, France
| | | | | | - Hervé M Blottière
- INRA, UMR1319, Jouy-en-Josas, France; AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Bernard Duclos
- Department of Gastroenterology, CHRU Hautepierre, Strasbourg, France
| | - Christiane Arnold
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; LabEx Medalis, Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Thomas Hussenet
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; LabEx Medalis, Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Joseph Hemmerlé
- Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France; Inserm U1121, Strasbourg, France
| | - Donald Gullberg
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Michèle Kedinger
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Lydia Sorokin
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
| | - Gertraud Orend
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; LabEx Medalis, Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Patricia Simon-Assmann
- Inserm U1109, MNT3 team, Strasbourg, France; Université de Strasbourg, Strasbourg, France; LabEx Medalis, Université de Strasbourg, Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| |
Collapse
|
9
|
Theodoratou E, Campbell H, Ventham NT, Kolarich D, Pučić-Baković M, Zoldoš V, Fernandes D, Pemberton IK, Rudan I, Kennedy NA, Wuhrer M, Nimmo E, Annese V, McGovern DPB, Satsangi J, Lauc G. The role of glycosylation in IBD. Nat Rev Gastroenterol Hepatol 2014; 11:588-600. [PMID: 24912389 DOI: 10.1038/nrgastro.2014.78] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A number of genetic and immunological studies give impetus for investigating the role of glycosylation in IBD. Experimental mouse models have helped to delineate the role of glycosylation in intestinal mucins and to explore the putative pathogenic role of glycosylation in colitis. These experiments have been extended to human studies investigating the glycosylation patterns of intestinal mucins as well as levels of glycans of serum glycoproteins and expression of glycan receptors. These early human studies have generated interesting hypotheses regarding the pathogenic role of glycans in IBD, but have generally been restricted to fairly small underpowered studies. Decreased glycosylation has been observed in the intestinal mucus of patients with IBD, suggesting that a defective inner mucus layer might lead to increased bacterial contact with the epithelium, potentially triggering inflammation. In sera, decreased galactosylation of IgG has been suggested as a diagnostic marker for IBD. Advances in glycoprofiling technology make it technically feasible and affordable to perform high-throughput glycan pattern analyses and to build on previous work investigating a much wider range of glycan parameters in large numbers of patients.
Collapse
Affiliation(s)
- Evropi Theodoratou
- Centre for Population Health Sciences, University of Edinburgh, Teviot Place, EH8 9AG, Edinburgh, UK
| | - Harry Campbell
- Centre for Population Health Sciences, University of Edinburgh, Teviot Place, EH8 9AG, Edinburgh, UK
| | - Nicholas T Ventham
- Centre for Molecular Medicine, University of Edinburgh, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, Edinburgh, UK
| | - Daniel Kolarich
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1 OT Golm, 14476, Potsdam, Germany
| | | | - Vlatka Zoldoš
- University of Zagreb, Faculty of Science, Horvatovac 102a, 10000 Zagreb, Croatia
| | | | - Iain K Pemberton
- IP Research Consulting SAS, 34 Rue Carnot, 93160 Noisy-le-Grand, Paris, France
| | - Igor Rudan
- Centre for Population Health Sciences, University of Edinburgh, Teviot Place, EH8 9AG, Edinburgh, UK
| | - Nicholas A Kennedy
- Centre for Molecular Medicine, University of Edinburgh, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, Edinburgh, UK
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands
| | - Elaine Nimmo
- Centre for Molecular Medicine, University of Edinburgh, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, Edinburgh, UK
| | - Vito Annese
- Department of Medical and Surgical Specialities, Division of Gastroenterology, AOU Careggi University Hospital, Largo Brambilla 13, 50139 Florence, Italy
| | - Dermot P B McGovern
- F.Widjaja Family Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Suite D4063, Los Angeles, CA 90048, USA
| | - Jack Satsangi
- Centre for Molecular Medicine, University of Edinburgh, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, Edinburgh, UK
| | - Gordan Lauc
- Department of Biochemistry and Molecular Biology, University of Zagreb Faculty of Pharmacy and Biochemistry, Trg maršala Tita 14, 10000 Zagreb, Croatia
| |
Collapse
|
10
|
Kobayashi M, Fujinaga Y, Ota H. Reappraisal of the Immunophenotype of Pancreatic Intraductal Papillary Mucinous Neoplasms (IPMNs)-Gastric Pyloric and Small Intestinal Immunophenotype Expression in Gastric and Intestinal Type IPMNs-. Acta Histochem Cytochem 2014; 47:45-57. [PMID: 25221363 PMCID: PMC4138401 DOI: 10.1267/ahc.13027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 02/05/2014] [Indexed: 12/11/2022] Open
Abstract
Pancreatic intraductal papillary mucinous neoplasms (IPMNs) are mucin-producing neoplasms of the main and/or branch pancreatic ducts. To assess differences between various IPMN subtypes, immunohistochemical markers of gastric surface mucous cells (MUC5AC), gastric gland mucous cells (MUC6 and GlcNAcα1→4Galβ→R), gastric pyloric and duodenal epithelial cells (PDX1), intestinal cells (MUC2 and CDX2), small intestinal cells (CPS1) and large intestinal cells (SATB2) were evaluated in 33 surgically treated IPMNs. MUC2 expression classified IPMNs into gastric (n=17), intestinal (n=8) and mixed gastric and intestinal type (collision=7, composite=1). No differences in age or sex were observed among these types. MUC5AC and PDX1 were expressed in all IPMNs. MUC6 expression was higher in gastric and mixed types than in intestinal type. GlcNAcα1→4Galβ→R was detected in gastric and mixed type, but not in intestinal type. MUC2 and CDX2 expression were higher in intestinal type than gastric and mixed type. CPS1 expression was higher in intestinal type than gastric type. SATB2 was not observed in any IPMNs. Frequent abrupt transition between the two IPMN types in mixed-type IPMNs was observed. Gastric pyloric and small intestinal differentiation are characteristic of gastric and intestinal type IPMN, respectively, and these two IPMN types may have distinct pathogenesis.
Collapse
Affiliation(s)
- Mikiko Kobayashi
- Department of Laboratory Medicine, Shinshu University Graduate School of Medicine
| | | | - Hiroyoshi Ota
- Department of Health and Medical Sciences, Shinshu University Graduate School of Medicine
| |
Collapse
|
11
|
Adalimumab Treatment in Biologically Naïve Crohn's Disease: Relationship with Ectopic MUC5AC Expression and Endoscopic Improvement. Gastroenterol Res Pract 2014; 2014:687257. [PMID: 24829572 PMCID: PMC4009194 DOI: 10.1155/2014/687257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 03/22/2014] [Accepted: 03/24/2014] [Indexed: 01/23/2023] Open
Abstract
Background. Adalimumab (ADA) is effective for patients with Crohn's disease (CD). However, there have been few reports on ADA therapy with respect to its relationship with pathologic findings and drug efficacy in biologically naïve CD cases. Methods. Fifteen patients with active biologically naïve CD were treated with ADA. We examined them clinically and pathologically with ectopic MUC5AC expression in the lesions before and after 12 and 52 weeks of ADA therapy, retrospectively. Results. Both mean CD activity index scores and serum C-reactive protein values were significantly lower after ADA therapy (P < 0.001). In the MUC5AC negative group, all cases exhibited clinical remission (CR) and endoscopic improvement at 52 weeks. In MUC5AC positive groups, loss of MUC5AC expression was detected in cases having CR and endoscopic improvement at 52 weeks, while remnant ectopic MUC5AC expression was observed in those exhibiting no endoscopic improvement and flare up after 52 weeks. Conclusions. ADA leads to CR and endoscopic improvement in biologically naïve CD cases. In addition, ectopic MUC5AC expression may be a predictive marker of flare up and endoscopic improvement in the intestines of CD patients.
Collapse
|
12
|
Abstract
MUC2 is the primary component of the mucin barrier that separates the intestinal microbiota and the intestinal epithelium. This mucous barrier is affected by both luminal/microbial factors and host/immune factors, both of which have genetic and environmental determinants. The complex interactions between these players in health and disease states are not fully understood. Inflammatory bowel disease (IBD) has both genetic and environmental etiologies that lead to the breakdown of the epithelial barrier. In this review, we explore the up-to-date evidence that implicates mucin in the pathogenesis of IBD. In IBD, quantitative changes in mucin secretion occur, as well as structural changes in mucin's glycoprotein core and the sulfation and sialylation of mucin's oligosaccharide residues. These changes are associated with a diminished functionality of the mucous barrier. We identify the various genetic mutations associated with these changes and outline the animal models that have enhanced the current understanding of the genetic basis for IBD. Further study is needed to better characterize the immune and genetic influences on mucin expression and secretion and role of endoplasmic reticulum stress and a defective unfolded protein response in mediating these changes.
Collapse
|
13
|
Sukka-Ganesh B, Mohammed KA, Kaye F, Goldberg EP, Nasreen N. Ephrin-A1 inhibits NSCLC tumor growth via induction of Cdx-2 a tumor suppressor gene. BMC Cancer 2012; 12:309. [PMID: 22824143 PMCID: PMC3488573 DOI: 10.1186/1471-2407-12-309] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Accepted: 06/28/2012] [Indexed: 01/27/2023] Open
Abstract
Background Tumor formation is a complex process which involves constitutive activation of oncogenes and suppression of tumor suppressor genes. Receptor EphA2 and its ligand ephrin-A1 form an important cell communication system with its functional role in cell-cell interaction and tumor growth. Loss of cell-cell adhesion is central to the cellular transformation and acquisition of metastatic potential. Claudins, the integrated tight junction (TJ) cell-cell adhesion proteins located on the apico-lateral portion of epithelial cells, functions in maintaining cell polarity. There is extensive evidence implicating Eph receptors and ephrins in malignancy, but the mechanisms how these molecular players affect TJ proteins and regulate tumor growth are not clear. In the present study we hypothesized that EphA2 signaling modulates claudin-2 gene expression via induction of cdx-2, a tumor suppressor gene in NSCLC cells. Methods The expression of EphA2, claudin-2 was determined in various NSCLC cell lines by using real-time quantitative polymerase chain reaction and Western blot analysis. The claudin-2 expression was also analyzed by immunofluorescence analysis. EphA2 and erk1/erk2 phosphorylation in ephrin-A1 activated cells was evaluated by Western blot analysis. The cell proliferation and tumor colony formation were determined by WST-1 and 3-D matrigel assays respectively. Results NSCLC cells over expressed receptor EphA2 and claudin-2. Ephrin-A1 treatment significantly down regulated the claudin-2 and EphA2 expression in NSCLC cells. The transient transfection of cells with vector containing ephrin-A1 construct (pcDNA-EFNA1) decreased the expression of claudin-2, EphA2 when compared to empty vector. In addition ephrin-A1 activation increased cdx-2 expression in A549 cells. In contrast over-expression of EphA2 with plasmid pcDNA-EphA2 up regulated claudin-2 mRNA expression and decreased cdx-2 expression. The transient transfection of cells with vector containing cdx-2 construct (pcMV-cdx-2) decreased the expression of claudin-2 in A549 cells. Moreover, silencing the expression of receptor EphA2 by siRNA significantly reduced claudin-2 expression and decreased cell proliferation and tumor formation. Furthermore, silencing cdx-2 gene expression before ephrin-A1 treatment increased claudin-2 expression along with increased cell proliferation and tumor growth in A549 cells. Conclusions Our study suggests that EphA2 signaling up-regulates the expression of the TJ-protein claudin-2 that plays an important role in promoting cell proliferation and tumor growth in NSCLC cells. We conclude that receptor EphA2 activation by ephrin-A1 induces tumor suppressor gene cdx-2 expression which attenuates cell proliferation, tumor growth and thus may be a promising therapeutic target against NSCLC.
Collapse
Affiliation(s)
- Bhagyalaxmi Sukka-Ganesh
- Division of Pulmonary & Critical Care Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
| | | | | | | | | |
Collapse
|
14
|
Ota H, Harada O, Uehara T, Hayama M, Ishii K. Aberrant expression of TFF1, TFF2, and PDX1 and their diagnostic value in lobular endocervical glandular hyperplasia. Am J Clin Pathol 2011; 135:253-61. [PMID: 21228366 DOI: 10.1309/ajcpqmao3pw4ogof] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Lobular endocervical glandular hyperplasia (LEGH) is a distinct benign glandular lesion expressing gastric gland mucous cell-type mucin (N-acetylglucosaminα1 → 4galactose → R [GlcNAcα1 → 4Gal → R]). To investigate histogenesis and diagnostic markers of LEGH, we examined the immunohistochemical expression profile of gastric surface mucous cell (MUC5AC and TFF1), gastric gland mucous cell (MUC6, TFF2, and GlcNAcα1 → 4Gal → R), gastric pyloric epithelial cell (PDX1), and endocervical cell (keratan sulfate) markers in normal endocervix samples and benign glandular lesions (nabothian cysts, tunnel clusters, and LEGHs). MUC5AC and MUC6 were expressed in normal endocervical mucosa and benign glandular lesions. TFF1, TFF2, GlcNAcα1 → 4Gal → R, and PDX1 were expressed only in LEGH. Keratan sulfate was expressed in normal endocervical mucosa and benign glandular lesions. In LEGH, gastric surface mucous cell and gastric gland mucous cell differentiation were demonstrated, and transdifferentiation from endocervical mucosa into gastric pyloric mucosa was suggested. In addition to GlcNAcα1 → 4Gal → R, TFF1, TFF2, and PDX1 are additional useful markers for LEGH.
Collapse
Affiliation(s)
- Hiroyoshi Ota
- Department of Biomedical Sciences, School of Health Sciences, Shinshu University School of Medicine, Matsumoto, Japan
| | - Oi Harada
- Division of Surgical Pathology, Nippon Medical School Hospital, Tokyo, Japan
| | - Takeshi Uehara
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
| | - Masayoshi Hayama
- Department of Biomedical Sciences, School of Health Sciences, Shinshu University School of Medicine, Matsumoto, Japan
| | - Keiko Ishii
- Department of Pathology, Okaya Municipal Hospital, Okaya, Japan
| |
Collapse
|
15
|
The role of CDX2 in intestinal homeostasis and inflammation. Biochim Biophys Acta Mol Basis Dis 2010; 1812:283-9. [PMID: 21126581 DOI: 10.1016/j.bbadis.2010.11.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 11/19/2010] [Accepted: 11/22/2010] [Indexed: 12/17/2022]
Abstract
Many transcription factors are known to control transcription at several promoters, while others are only active at a few places. However, due to their importance in controlling cellular functions, aberrant transcription factor function and inappropriate gene regulation have been shown to play a causal role in a large number of diseases and developmental disorders. Inflammatory bowel disease (IBD) is characterized by a chronically inflamed mucosa caused by dysregulation of the intestinal immune homeostasis. The aetiology of IBD is thought to be a combination of genetic and environmental factors, including luminal bacteria. The Caudal-related homeobox transcription factor 2 (CDX2) is critical in early intestinal differentiation and has been implicated as a master regulator of the intestinal homeostasis and permeability in adults. When expressed, CDX2 modulates a diverse set of processes including cell proliferation, differentiation, cell adhesion, migration, and tumorigenesis. In addition to these critical cellular processes, there is increasing evidence for linking CDX2 to intestinal inflammation. The aim of the present paper was to review the current knowledge of CDX2 in regulation of the intestinal homeostasis and further to reveal its potential role in inflammation.
Collapse
|
16
|
Lacher M, Fitze G, Helmbrecht J, Schroepf S, Berger M, Lohse P, Koletzko S, Ballauff A, Grote V, Goedeke J, von Schweinitz D, Kappler R. Hirschsprung-associated enterocolitis develops independently of NOD2 variants. J Pediatr Surg 2010; 45:1826-31. [PMID: 20850627 DOI: 10.1016/j.jpedsurg.2010.02.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 02/01/2010] [Accepted: 02/05/2010] [Indexed: 01/17/2023]
Abstract
UNLABELLED BACKGROUD/PURPOSE: Hirschsprung-associated enterocolitis (HAEC) represents a cause for significant pre- and postoperative morbidity and mortality in Hirschsprung disease (HD). Although multiple studies on HAEC have been performed and several mechanisms have been presumed, the pathogenesis of this condition remains unclear. As changes in colonic mucosal defense are key factors suggested in both Crohn's disease (CD) and HAEC pathogenesis, the aim of the current study was to investigate genetic alterations in the most important susceptibility gene for Crohn's enterocolitis (NOD2) to see whether carriers of polymorphisms within the NOD2 gene are predisposed to the development of HAEC. METHODS Genotyping for the NOD2 variants in exon 4 (p.Arg702Trp [rs2066844]), exon 8 (p.Gly908Arg [rs2066845]), and exon 11 (p.1007fs [rs2066847]) was performed in 52 white children with HD (41 boys, 11 girls), 152 healthy controls, and 152 children with CD (onset of disease <17 years; mean, 11.8 years). Seventeen patients with HD (32.7%) were carriers of a RET germline mutation, 35 children (67.3%) had short segment disease, and 17 (32.7%) had long segment disease. RESULTS Ten children (19.2%) with HD were heterozygous carriers of at least one NOD2 variant vs 17 (11.2%) in the healthy control group and 69 (45.4%) in the CD cohort. Hirschsprung-associated enterocolitis was observed in 7 children (13.5%), with 4 having short segment HD and 3 with long segment HD; but none of them were carriers of NOD2 variants. CONCLUSION Our study shows that NOD2 variants described to be causatively associated with CD do not predispose to the development of HAEC. As data on the molecular basis of HAEC are limited, the distinct mechanisms involved in the pathogenesis of this complication remain unclear.
Collapse
Affiliation(s)
- Martin Lacher
- Department of Pediatric Surgery, Research Laboratories, University of Munich, D-80337 Munich, Germany.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|