1
|
Bardell D, Rocchigiani G, Ressel L, Milner P. Histological Evaluation of Resected Tissue as a Predictor of Survival in Horses with Strangulating Small Intestinal Disease. Animals (Basel) 2023; 13:2715. [PMID: 37684979 PMCID: PMC10486948 DOI: 10.3390/ani13172715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/19/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
Strangulating small intestinal disease (SSID) in horses carries a poor prognosis for survival, especially following resection of ischaemic tissue. The margins of a resection are principally based on visual appraisal of the intestine during surgery. We hypothesized that histological evaluation of resected tissue may identify occult changes indicative of prognosis. Small intestinal samples from 18 horses undergoing resection for SSID and 9 horses euthanised for reasons unrelated to gastrointestinal pathology were utilised. Histological appearance was used to generate a 'total damage score' (TDS) for the control tissue, grossly normal tissue at oral and aboral extremities (sections OR1 and AB1) of the resected intestine, and oral and aboral extremities of visually abnormal tissue (sections OR2 and AB2) from SSID horses. The relationship between TDS and long-term post-operative survival was investigated. TDS was not different between control tissues and OR1 and AB1 sections. Five surgical cases were alive at follow-up, the longest follow-up time being 2561 days. Based on the median scores for SSID cases versus controls, cut-off values were generated to evaluate post-operative survival versus TDS. Only OR2 TDS was significantly associated with survival, with a higher (worse) score indicating longer survival. More severe tissue insult may expedite rapid progression to surgery, improving post-operative outcomes.
Collapse
Affiliation(s)
- David Bardell
- Department of Equine Clinical Sciences, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK;
| | - Guido Rocchigiani
- Department of Veterinary Anatomy Physiology and Pathology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK; (G.R.); (L.R.)
| | - Lorenzo Ressel
- Department of Veterinary Anatomy Physiology and Pathology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK; (G.R.); (L.R.)
| | - Peter Milner
- Department of Equine Clinical Sciences, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK;
| |
Collapse
|
2
|
Hundscheid IHR, Schellekens DHSM, Grootjans J, Den Dulk M, Van Dam RM, Beets GL, Buurman WA, Lenaerts K, Derikx JPM, Dejong CHC. Evaluating the safety of two human experimental intestinal ischemia reperfusion models: A retrospective observational study. PLoS One 2021; 16:e0253506. [PMID: 34143845 PMCID: PMC8213171 DOI: 10.1371/journal.pone.0253506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 06/05/2021] [Indexed: 11/18/2022] Open
Abstract
Background We developed a jejunal and colonic experimental human ischemia-reperfusion (IR) model to study pathophysiological intestinal IR mechanisms and potential new intestinal ischemia biomarkers. Our objective was to evaluate the safety of these IR models by comparing patients undergoing surgery with and without in vivo intestinal IR. Methods A retrospective study was performed comparing complication rates and severity, based on the Clavien-Dindo classification system, in patients undergoing pancreatoduodenectomy with (n = 10) and without (n = 20 matched controls) jejunal IR or colorectal surgery with (n = 10) and without (n = 20 matched controls) colon IR. Secondary outcome parameters were operative time, blood loss, 90-day mortality and length of hospital stay. Results Following pancreatic surgery, 63% of the patients experienced one or more postoperative complications. There was no significant difference in incidence or severity of complications between patients undergoing pancreatic surgery with (70%) or without (60%, P = 0.7) jejunal IR. Following colorectal surgery, 60% of the patients experienced one or more postoperative complication. Complication rate and severity were similar in patients with (50%) and without (65%, P = 0.46) colonic IR. Operative time, amount of blood loss, postoperative C-reactive protein, length of hospital stay or mortality were equal in both intervention and control groups for jejunal and colon IR. Conclusion This study showed that human experimental intestinal IR models are safe in patients undergoing pancreatic or colorectal surgery.
Collapse
Affiliation(s)
- Inca H. R. Hundscheid
- Department of Pathology, Maastricht University Medical Centre+, Maastricht, The Netherlands
- NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
- * E-mail:
| | - Dirk H. S. M. Schellekens
- NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Joep Grootjans
- NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
| | - Marcel Den Dulk
- Department of Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Surgery, RWTH University Hospital Aachen, Aachen, Germany
| | - Ronald M. Van Dam
- Department of Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Surgery, RWTH University Hospital Aachen, Aachen, Germany
| | - Geerard L. Beets
- Department of Surgery, The Antoni van Leeuwenhoek Netherlands Cancer Institute, Amsterdam, The Netherlands
- GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Wim A. Buurman
- MHeNs School for Mental Healthy and Neuroscience, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Kaatje Lenaerts
- NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Joep P. M. Derikx
- Department of Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Pediatric Surgery, Emma Children’s Hospital, Amsterdam University Medical Centre, University of Amsterdam, Free University of Amsterdam, Amsterdam, The Netherlands
| | - Cornelis H. C. Dejong
- NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Surgery, RWTH University Hospital Aachen, Aachen, Germany
| |
Collapse
|
3
|
Proteomics analysis of human intestinal organoids during hypoxia and reoxygenation as a model to study ischemia-reperfusion injury. Cell Death Dis 2021; 12:95. [PMID: 33462215 PMCID: PMC7813872 DOI: 10.1038/s41419-020-03379-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/15/2022]
Abstract
Intestinal ischemia-reperfusion (IR) injury is associated with high mortality rates, which have not improved in the past decades despite advanced insight in its pathophysiology using in vivo animal and human models. The inability to translate previous findings to effective therapies emphasizes the need for a physiologically relevant in vitro model to thoroughly investigate mechanisms of IR-induced epithelial injury and test potential therapies. In this study, we demonstrate the use of human small intestinal organoids to model IR injury by exposing organoids to hypoxia and reoxygenation (HR). A mass-spectrometry-based proteomics approach was applied to characterize organoid differentiation and decipher protein dynamics and molecular mechanisms of IR injury in crypt-like and villus-like human intestinal organoids. We showed successful separation of organoids exhibiting a crypt-like proliferative phenotype, and organoids exhibiting a villus-like phenotype, enriched for enterocytes and goblet cells. Functional enrichment analysis of significantly changing proteins during HR revealed that processes related to mitochondrial metabolism and organization, other metabolic processes, and the immune response were altered in both organoid phenotypes. Changes in protein metabolism, as well as mitophagy pathway and protection against oxidative stress were more pronounced in crypt-like organoids, whereas cellular stress and cell death associated protein changes were more pronounced in villus-like organoids. Profile analysis highlighted several interesting proteins showing a consistent temporal profile during HR in organoids from different origin, such as NDRG1, SDF4 or DMBT1. This study demonstrates that the HR response in human intestinal organoids recapitulates properties of the in vivo IR response. Our findings provide a framework for further investigations to elucidate underlying mechanisms of IR injury in crypt and/or villus separately, and a model to test therapeutics to prevent IR injury.
Collapse
|
4
|
Mauramati S, Morbini P, Ferrario G, Alnemr M, Luka E, Occhini A, Bertino G, Klersy C, Alessiani M, Benazzo M. Morphological analysis of ischemia-reperfusion injury in a cold ischemia model of jejunal free flap for hypopharyngeal reconstruction. J Plast Reconstr Aesthet Surg 2019; 73:103-110. [PMID: 31494055 DOI: 10.1016/j.bjps.2019.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 07/17/2019] [Accepted: 07/27/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND Jejunal free flap (JFF) reconstruction is a popular treatment option for advanced hypopharyngeal cancer. Several factors including ischemia-reperfusion injury (IRI) can cause mucosal damage and progressive flap necrosis. We investigated the development and time-related progression of morphological and cellular changes in patients with JFF reconstruction including cold preservation of the graft. METHODS Eleven patients were enrolled. Biopsies were taken during surgery from normally perfused tissue, before loop isolation (T0), at the end of back-table surgery (T1), immediately before reperfusion (T2), 15' after reperfusion (T3), and at the end of the digestive anastomoses (T4) and from the external monitor daily from the 1st to the 5th postoperative day (M1-M5). Histomorphological and immunohistochemical parameters in the intraoperative and postoperative samples were evaluated and compared. RESULTS Delayed flap necrosis was observed in 2 patients. The cold ischemia phase did not negatively affect mucosal regeneration after reperfusion; morphological and cellular damage parameters returned to normal by the end of surgery or along the early postoperative period. Significant enterocyte replication activity was observed at the end of revascularization, which continued in the postoperative phase, leading to recovery of the epithelial morphological integrity and disappearance of apoptotic cells. An inflammatory infiltrate persisted in the M samples, and in a significant proportion of samples, mucosal fibrosis developed by the end of the postoperative observation. CONCLUSION Cold perfusion and preservation of the JFF can effectively limit the negative effects of IRI and to prevent short- and medium-term complications that can compromise the final outcome.
Collapse
Affiliation(s)
- Simone Mauramati
- Department of Otorhinolaryngology, University of Pavia, Foundation IRCCS Policlinico San Matteo, P.le Golgi 5, 27100 Pavia, Italy.
| | - Patrizia Morbini
- Department of Molecular Medicine, Unit of Pathology, University of Pavia, Foundation IRCCS Policlinico San Matteo, Via Forlanini 16, 27100 Pavia, Italy
| | - Giuseppina Ferrario
- Department of Molecular Medicine, Unit of Pathology, University of Pavia, Foundation IRCCS Policlinico San Matteo, Via Forlanini 16, 27100 Pavia, Italy
| | - Mohamed Alnemr
- Department of Otorhinolaryngology, Faculty of Medicine, Zagazig University, Zagazig, Sharkia, Egypt
| | - Elona Luka
- Service of Clinical Epidemiology & Biometry, Fondazione IRCCS Policlinico San Matteo, P.le Golgi 5, 27100 Pavia, Italy
| | - Antonio Occhini
- Department of Otorhinolaryngology, University of Pavia, Foundation IRCCS Policlinico San Matteo, P.le Golgi 5, 27100 Pavia, Italy
| | - Giulia Bertino
- Department of Otorhinolaryngology, University of Pavia, Foundation IRCCS Policlinico San Matteo, P.le Golgi 5, 27100 Pavia, Italy
| | - Catherine Klersy
- Service of Clinical Epidemiology & Biometry, Fondazione IRCCS Policlinico San Matteo, P.le Golgi 5, 27100 Pavia, Italy
| | - Mario Alessiani
- ASST of Pavia, University of Pavia, C.so di Strada Nuova 5, 27100 Pavia, Italy
| | - Marco Benazzo
- Department of Otorhinolaryngology, University of Pavia, Foundation IRCCS Policlinico San Matteo, P.le Golgi 5, 27100 Pavia, Italy
| |
Collapse
|
5
|
Females Are More Resistant to Ischemia-Reperfusion-induced Intestinal Injury Than Males. Ann Surg 2019; 272:1070-1079. [DOI: 10.1097/sla.0000000000003167] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
6
|
Mester A, Magyar Z, Sogor V, Tanczos B, Stark Y, Cherniavsky K, Bidiga L, Peto K, Nemeth N. Intestinal ischemia-reperfusion leads to early systemic micro-rheological and multiorgan microcirculatory alterations in the rat. Clin Hemorheol Microcirc 2018; 68:35-44. [DOI: 10.3233/ch-170278] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Anita Mester
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Zsuzsanna Magyar
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Viktoria Sogor
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Bence Tanczos
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Yoav Stark
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Konstantin Cherniavsky
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Laszlo Bidiga
- Department of Pathology, University of Debrecen, Hungary
| | - Katalin Peto
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Norbert Nemeth
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| |
Collapse
|
7
|
Schellekens DHSM, Hundscheid IHR, Leenarts CAJI, Grootjans J, Lenaerts K, Buurman WA, Dejong CHC, Derikx JPM. Human small intestine is capable of restoring barrier function after short ischemic periods. World J Gastroenterol 2017; 23:8452-8464. [PMID: 29358855 PMCID: PMC5752707 DOI: 10.3748/wjg.v23.i48.8452] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/08/2017] [Accepted: 08/15/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To assess intestinal barrier function during human intestinal ischemia and reperfusion (IR).
METHODS In a human experimental model, 6 cm of jejunum was selectively exposed to 30 min of ischemia (I) followed by 30 and 120 min of reperfusion (R). A sham procedure was also performed. Blood and tissue was sampled at all-time points. Functional barrier function was assessed using dual-sugar absorption tests with lactulose (L) and rhamnose (R). Plasma concentrations of citrulline, an amino acid described as marker for enterocyte function were measured as marker of metabolic enterocytes restoration. Damage to the epithelial lining was assessed by immunohistochemistry for tight junctions (TJs), by plasma marker for enterocytes damage (I-FABP) and analyzed by electron microscopy (EM) using lanthanum nitrate as an electrondense marker.
RESULTS Plasma L/R ratio’s were significantly increased after 30 min of ischemia (30I) followed by 30 min of reperfusion (30R) compared to control (0.75 ± 0.10 vs 0.20 ± 0.09, P < 0.05). At 120 min of reperfusion (120R), ratio’s normalized (0.17 ± 0.06) and were not significantly different from control. Plasma levels of I-FABP correlated with plasma L/R ratios measured at the same time points (correlation: 0.467, P < 0.01). TJs staining shows distortion of staining at 30I. An intact lining of TJs was again observed at 30I120R. Electron microscopy analysis revealed disrupted TJs after 30I with paracellular leakage of lanthanum nitrate, which restored after 30I120R. Furthermore, citrulline concentrations closely paralleled the histological perturbations during intestinal IR.
CONCLUSION This study directly correlates histological data with intestinal permeability tests, revealing that the human gut has the ability of to withstand short episodes of ischemia, with morphological and functional recovery of the intestinal barrier within 120 min of reperfusion.
Collapse
Affiliation(s)
- Dirk HSM Schellekens
- Department of Surgery, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
| | - Inca HR Hundscheid
- Department of Surgery, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
| | - Claire AJI Leenarts
- Department of Surgery, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
| | - Joep Grootjans
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
- Department of Gastroenterology, Academic Medical Center, Amsterdam 1105 AZ, the Netherlands
| | - Kaatje Lenaerts
- Department of Surgery, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
| | - Wim A Buurman
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
- MHeNs School of Mental Health and Neuroscience, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
| | - Cornelis HC Dejong
- Department of Surgery, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
| | - Joep PM Derikx
- Department of Surgery, Maastricht University Medical Center, Maastricht 6200 MD, the Netherlands
- NUTRIM, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht 6200 MD, the Netherlands
- Pediatric Surgical Center of Amsterdam, Emma Children's Hospital Academic Medical Center and VU University Medical Center, Amsterdam 1100 DE, the Netherlands
| |
Collapse
|
8
|
Abstract
PURPOSE OF REVIEW Gut barrier failure is associated with bacterial translocation, systemic inflammation, and is presumed to be associated with the development of multiple organ dysfunction syndrome. As the gut barrier function is carried out by a monolayer of enterocytes, a minimum requirement is the integrity of the enterocytes, and controlled paracellular permeability between adjacent enterocytes. Many factors can cause critically ill patients to lose gut barrier function by a mechanism of enterocyte damage; for example, small bowel ischemia or hypoxia, sepsis, systemic inflammatory response syndrome, or absence of enteral feeding. RECENT FINDINGS Two enterocyte biomarkers may help the intensivist to identify enterocyte damage and dysfunction, namely plasma citrulline, a biomarker of functional enterocyte mass, and plasma or urinary intestinal fatty acid-binding protein, a marker of enterocyte damage. This review focuses on results obtained with these biomarkers in the context of critical care, in particular: prevalence of enterocyte biomarker abnormalities; mechanisms associated with enterocyte damage and dysfunction; link with systemic inflammation, bacterial translocation, and clinical intestinal dysfunction; prognostic value of enterocyte biomarkers. Lastly, we also review the limits of these biomarkers. SUMMARY Enterocyte biomarkers may help the intensivist to identify patients presenting with intestinal damage, and who are at risk of bacterial translocation and systemic inflammatory response syndrome, as well as those with decreased enterocyte function, at risk of malabsorption. Enterocyte biomarkers should be interpreted with caution in the critically ill and should be interpreted within the overall clinical context of the patient.
Collapse
|
9
|
Grootjans J, Lenaerts K, Buurman WA, Dejong CHC, Derikx JPM. Life and death at the mucosal-luminal interface: New perspectives on human intestinal ischemia-reperfusion. World J Gastroenterol 2016; 22:2760-2770. [PMID: 26973414 PMCID: PMC4777998 DOI: 10.3748/wjg.v22.i9.2760] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 09/24/2015] [Accepted: 12/14/2015] [Indexed: 02/06/2023] Open
Abstract
Intestinal ischemia is a frequently observed phenomenon. Morbidity and mortality rates are extraordinarily high and did not improve over the past decades. This is in part attributable to limited knowledge on the pathophysiology of intestinal ischemia-reperfusion (IR) in man, the paucity in preventive and/or therapeutic options and the lack of early diagnostic markers for intestinal ischemia. To improve our knowledge and solve clinically important questions regarding intestinal IR, we developed a human experimental intestinal IR model. With this model, we were able to gain insight into the mechanisms that allow the human gut to withstand short periods of IR without the development of severe inflammatory responses. The purpose of this review is to overview the most relevant recent advances in our understanding of the pathophysiology of human intestinal IR, as well as the (potential) future clinical implications.
Collapse
|
10
|
Abstract
Acute gastrointestinal injury (AGI) is common in critical illness and negatively affects outcome. A variety of definitions have been used to describe AGI, which has led to clinical confusion and hampered comparison of research studies across institutions. An international working group of the European Society of Intensive Care Medicine was convened to standardize definitions for AGI and provide current evidence-based understanding of its pathophysiology and management. This disorder is associated with a wide variety of signs and symptoms and may be difficult to detect, therefore a high index of suspicion is warranted.
Collapse
Affiliation(s)
- Robert W Taylor
- Department of Critical Care Medicine, Mercy Hospital St. Louis, Suite 4006B, St Louis, MO 63141, USA.
| |
Collapse
|
11
|
The Human Colon Is More Resistant to Ischemia-reperfusion-induced Tissue Damage Than the Small Intestine: An Observational Study. Ann Surg 2015; 262:304-11. [PMID: 25915914 DOI: 10.1097/sla.0000000000001131] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Aim of this study was to draw comparisons between human colonic and jejunal ischemia-reperfusion sequelae in a human in vivo experimental model. BACKGROUND In patients, colonic ischemia-reperfusion generally has a milder course than small intestinal ischemia-reperfusion. It is unclear which pathophysiologic processes are responsible for this difference. METHODS In 10 patients undergoing colonic surgery and 10 patients undergoing pancreaticoduodenectomy, 6 cm colon or jejunum was isolated and exposed to 60 minutes ischemia followed by various reperfusion periods. Morphology (hematoxylin and eosin), apoptosis (M30), tight junctions (zonula occludens 1), and neutrophil influx (myeloperoxidase) were assessed using immunohistochemistry. Quantitative polymerase chain reaction and enzyme-linked immunosorbent assay were performed for interleukin-6 and tumor necrosis factor-α. RESULTS Hematoxylin and eosin staining revealed intact colonic epithelial lining, but extensive damage in jejunal villus tips after 60 minutes ischemia. After reperfusion, the colonic epithelial lining was not affected, whereas the jejunal epithelium was seriously damaged. Colonic apoptosis was limited to scattered cells in surface epithelium, whereas apoptosis was clearly observed in jejunal villi and crypts, (42 times more M30 positivity compared with colon, P < 0.01). Neutrophil influx and increased tumor necrosis factor-α mRNA expression were observed in jejunum after 30 and 120 minutes of reperfusion (P < 0.05). Interleukin-6 mRNA expression was increased in jejunum after 120 minutes of reperfusion (3.6-fold increase, P < 0.05), whereas interleukin-6 protein expression was increased in both colon (1.5-fold increase, P < 0.05) and small intestine (1.5-fold increase, P < 0.05) after 30 and 120 minutes of reperfusion. CONCLUSIONS Human colon is less susceptible to IR-induced tissue injury than small intestine.
Collapse
|
12
|
Porcine models of digestive disease: the future of large animal translational research. Transl Res 2015; 166:12-27. [PMID: 25655839 PMCID: PMC4458388 DOI: 10.1016/j.trsl.2015.01.004] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 01/03/2015] [Accepted: 01/07/2015] [Indexed: 12/14/2022]
Abstract
There is increasing interest in nonrodent translational models for the study of human disease. The pig, in particular, serves as a useful animal model for the study of pathophysiological conditions relevant to the human intestine. This review assesses currently used porcine models of gastrointestinal physiology and disease and provides a rationale for the use of these models for future translational studies. The pig has proven its utility for the study of fundamental disease conditions such as ischemia-reperfusion injury, stress-induced intestinal dysfunction, and short bowel syndrome. Pigs have also shown great promise for the study of intestinal barrier function, surgical tissue manipulation and intervention, as well as biomaterial implantation and tissue transplantation. Advantages of pig models highlighted by these studies include the physiological similarity to human intestine and mechanisms of human disease. Emerging future directions for porcine models of human disease include the fields of transgenics and stem cell biology, with exciting implications for regenerative medicine.
Collapse
|
13
|
Gonzalez LM, Moeser AJ, Blikslager AT. Animal models of ischemia-reperfusion-induced intestinal injury: progress and promise for translational research. Am J Physiol Gastrointest Liver Physiol 2015; 308:G63-75. [PMID: 25414098 PMCID: PMC4297854 DOI: 10.1152/ajpgi.00112.2013] [Citation(s) in RCA: 164] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Research in the field of ischemia-reperfusion injury continues to be plagued by the inability to translate research findings to clinically useful therapies. This may in part relate to the complexity of disease processes that result in intestinal ischemia but may also result from inappropriate research model selection. Research animal models have been integral to the study of ischemia-reperfusion-induced intestinal injury. However, the clinical conditions that compromise intestinal blood flow in clinical patients ranges widely from primary intestinal disease to processes secondary to distant organ failure and generalized systemic disease. Thus models that closely resemble human pathology in clinical conditions as disparate as volvulus, shock, and necrotizing enterocolitis are likely to give the greatest opportunity to understand mechanisms of ischemia that may ultimately translate to patient care. Furthermore, conditions that result in varying levels of ischemia may be further complicated by the reperfusion of blood to tissues that, in some cases, further exacerbates injury. This review assesses animal models of ischemia-reperfusion injury as well as the knowledge that has been derived from each to aid selection of appropriate research models. In addition, a discussion of the future of intestinal ischemia-reperfusion research is provided to place some context on the areas likely to provide the greatest benefit from continued research of ischemia-reperfusion injury.
Collapse
Affiliation(s)
- Liara M. Gonzalez
- 1Department of Clinical Sciences, Center for Comparative Medicine and Translational Research, North Carolina State University, Raleigh, North Carolina; and
| | - Adam J. Moeser
- 2Department of Population Health and Pathobiology, Center for Comparative Medicine and Translational Research, North Carolina State University, Raleigh, North Carolina
| | - Anthony T. Blikslager
- 1Department of Clinical Sciences, Center for Comparative Medicine and Translational Research, North Carolina State University, Raleigh, North Carolina; and
| |
Collapse
|
14
|
Intestinal permeability--a new target for disease prevention and therapy. BMC Gastroenterol 2014; 14:189. [PMID: 25407511 PMCID: PMC4253991 DOI: 10.1186/s12876-014-0189-7] [Citation(s) in RCA: 1075] [Impact Index Per Article: 107.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 10/17/2014] [Indexed: 02/06/2023] Open
Abstract
Data are accumulating that emphasize the important role of the intestinal barrier and intestinal permeability for health and disease. However, these terms are poorly defined, their assessment is a matter of debate, and their clinical significance is not clearly established. In the present review, current knowledge on mucosal barrier and its role in disease prevention and therapy is summarized. First, the relevant terms 'intestinal barrier' and 'intestinal permeability' are defined. Secondly, the key element of the intestinal barrier affecting permeability are described. This barrier represents a huge mucosal surface, where billions of bacteria face the largest immune system of our body. On the one hand, an intact intestinal barrier protects the human organism against invasion of microorganisms and toxins, on the other hand, this barrier must be open to absorb essential fluids and nutrients. Such opposing goals are achieved by a complex anatomical and functional structure the intestinal barrier consists of, the functional status of which is described by 'intestinal permeability'. Third, the regulation of intestinal permeability by diet and bacteria is depicted. In particular, potential barrier disruptors such as hypoperfusion of the gut, infections and toxins, but also selected over-dosed nutrients, drugs, and other lifestyle factors have to be considered. In the fourth part, the means to assess intestinal permeability are presented and critically discussed. The means vary enormously and probably assess different functional components of the barrier. The barrier assessments are further hindered by the natural variability of this functional entity depending on species and genes as well as on diet and other environmental factors. In the final part, we discuss selected diseases associated with increased intestinal permeability such as critically illness, inflammatory bowel diseases, celiac disease, food allergy, irritable bowel syndrome, and--more recently recognized--obesity and metabolic diseases. All these diseases are characterized by inflammation that might be triggered by the translocation of luminal components into the host. In summary, intestinal permeability, which is a feature of intestinal barrier function, is increasingly recognized as being of relevance for health and disease, and therefore, this topic warrants more attention.
Collapse
|
15
|
|
16
|
Grootjans J, Hundscheid IH, Buurman WA. Goblet cell compound exocytosis in the defense against bacterial invasion in the colon exposed to ischemia-reperfusion. Gut Microbes 2013; 4:232-5. [PMID: 23542685 PMCID: PMC3669168 DOI: 10.4161/gmic.23866] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
In recent years, the importance of the mucus layer in the colon has become increasingly clear. Disturbance of the mucus layer has been implicated in a variety of intestinal diseases. We have recently investigated the importance of the mucus layer in colon ischemia-reperfusion (IR). Using a newly developed human and rat colon IR model, we showed that colon ischemia leads to mucus barrier breakdown. This allowed intraluminal bacteria to interact with the colonic epithelium, which was associated with an inflammatory response. Intriguingly, we found goblet cells to respond immediately by expelling their mucin granules into the gut lumen, which flushed bacteria from the colonic crypts and resulted in rapid restoration of the mucus layer during reperfusion. Our study might explain why ischemic colitis tends to have favorable outcomes and can often be treated conservatively.
Collapse
Affiliation(s)
- Joep Grootjans
- Department of Internal Medicine; Slotervaartziekenhuis; Amsterdam, the Netherlands,Correspondence to: Joep Grootjans,
| | - Inca H. Hundscheid
- Department of Surgery; NUTRIM School for Nutrition, Toxicology & Metabolism; Maastricht University Medical Centre; Maastricht, the Netherlands
| | - Wim A. Buurman
- NUTRIM School for Nutrition, Toxicology & Metabolism; Maastricht University Medical Centre; Maastricht, the Netherlands
| |
Collapse
|
17
|
Grimaldi D, Guivarch E, Neveux N, Fichet J, Pène F, Marx JS, Chiche JD, Cynober L, Mira JP, Cariou A. Markers of intestinal injury are associated with endotoxemia in successfully resuscitated patients. Resuscitation 2012; 84:60-5. [PMID: 22743354 DOI: 10.1016/j.resuscitation.2012.06.010] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 05/29/2012] [Accepted: 06/05/2012] [Indexed: 01/15/2023]
Abstract
AIMS Gut dysfunction is suspected to play a major role in the pathophysiology of post-resuscitation disease through an increase in intestinal permeability and endotoxin release. However this dysfunction often remains occult and is poorly investigated. The aim of this pilot study was to explore intestinal failure biomarkers in post-cardiac arrest patients and to correlate them with endotoxemia. METHODS Following resuscitation after cardiac arrest, 21 patients were prospectively studied. Urinary intestinal fatty acid-binding protein (IFABP), which marks intestinal permeability, plasma citrulline, which reflects the functional enterocyte mass, and whole blood endotoxin were measured at admission, days 1-3 and 6. We explored the kinetics of release and the relationship between IFABP, citrulline and endotoxin values. RESULTS IFABP was extremely high at admission and normalized at D3 (6668 pg/mL vs 39 pg/mL, p=0.01). Lowest median of citrulline (N=20-40 μmol/L) was attained at D2 (11 μmol/L at D2 vs 24 μmol/L at admission, p=0.01) and tended to normalize at D6 (21 μmol/L). During ICU stay, 86% of patients presented a detectable endotoxemia. Highest endotoxin level was positively correlated with highest IFABP level (R(2)=0.31, p=0.01) and was inversely correlated with lowest plasma citrulline levels (R(2)=0.55, p<0.001). Endotoxin levels increased between admission and D2 in patients with post-resuscitation shock, whereas it decreases in patients with no shock (median +0.33 EU vs -0.19 EU, p=0.03). Highest endotoxin level was positively correlated with D3 SOFA score (R(2)=0.45, p=0.004). CONCLUSION Biomarkers of intestinal injury are altered after cardiac arrest and are associated with endotoxemia. This could worsen post-resuscitation shock and organ failure.
Collapse
Affiliation(s)
- D Grimaldi
- Medical Intensive Care Unit, Groupe Hospitalier Broca Cochin Hotel-Dieu, AP-HP, 27 rue du Faubourg Saint Jacques, 75679 Paris Cedex 14, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Real-time in vivo imaging of early mucosal changes during ischemia-reperfusion in human jejunum. PLoS One 2012; 7:e39638. [PMID: 22745799 PMCID: PMC3382139 DOI: 10.1371/journal.pone.0039638] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 05/27/2012] [Indexed: 02/08/2023] Open
Abstract
Background and study aims Small intestinal ischemia-reperfusion (IR) is a frequent, potentially life threatening phenomenon. There is a lack of non-invasive diagnostic modalities. For many intestinal diseases, visualizing the intestinal mucosa using endoscopy is gold standard. However, limited knowledge exists on small intestinal IR-induced, early mucosal changes. The aims of this study were to investigate endoscopic changes in human jejunum exposed to IR, and to study concordance between endoscopic appearance and histology. Patients and methods In 23 patients a part of jejunum, to be removed for surgical reasons, was isolated and selectively exposed to ischemia with 0, 30 or 120 minutes of reperfusion. In 3 patients, a videocapsule was inserted in the isolated segment before exposure to IR, to visualize the mucosa. Endoscopic view at several time points was related to histology (Heamatoxylin & Eosin) obtained from 20 patients. Results Ischemia was characterized by loss of villous structure, mucosal whitening and appearance of punctate lesions. This was related to appearance of subepithelial spaces and breaches in the epithelial lining in the histological view. Early during reperfusion, the lumen filled with IR-damaged, shed cells and VCE showed mucosal erosions, hemorrhage and intraluminal debris. At 60 minutes of reperfusion, the only remaining signs of IR were loss of villous structure and small erosions, indicating rapid mucosal healing. Conclusions This study shows a unique, real-time in vivo endoscopic view of early mucosal changes during IR of the human small intestine. Future studies should evaluate its usefulness in diagnosis of patients suspected of IR.
Collapse
|
19
|
Abstract
PURPOSE OF REVIEW Nutrition risk assessment is of great importance to identify patients who may benefit from nutritional intervention to prevent ICU starvation and avoid side-effects of nutrition care. The full spectrum of nutrition risk assessment in ICU has not been defined in guidelines. RECENT FINDINGS Many patients are admitted to ICUs with nutritional deficits related to acute and chronic disease. The vast majority of patients who cannot resume sufficient oral feeding within a few days will lose body cell mass due to the severe and prolonged inflammatory process and insufficient nutrient intake. All patients staying longer than 1-2 days in the ICU need nutrition support, close monitoring and risk assessment. Risk assessment has to be constantly maintained throughout the ICU stay to manage properly risks associated with critical illness and nutrition care. Many patients are at risk to develop a refeeding syndrome, to experience serious motility disorders and finally dysphagia after extubation. The dramatic consequences of intra-abdominal hypertension may be decreased by early detection and treatment. There is a close interaction between evolution of critical illness, the associated inflammatory reaction, ICU treatments and nutrition care. SUMMARY Safe and efficient nutrition care may only be obtained when gastrointestinal function and metabolic tolerance of nutrients are regularly assessed.
Collapse
Affiliation(s)
- Michael Hiesmayr
- Department of Cardiac-Thoracic-Vascular Anaesthesia and Intensive Care, Medical University Vienna, Austria.
| |
Collapse
|
20
|
Grootjans J, Thuijls G, Derikx JPM, van Dam RM, Dejong CHC, Buurman WA. Rapid lamina propria retraction and zipper-like constriction of the epithelium preserves the epithelial lining in human small intestine exposed to ischaemia-reperfusion. J Pathol 2011; 224:411-9. [PMID: 21547908 DOI: 10.1002/path.2882] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 02/08/2011] [Accepted: 02/20/2011] [Indexed: 12/13/2022]
Abstract
To ensure a sufficient barrier between a host and noxious luminal content, the intestinal epithelium must be equipped with efficient mechanisms to limit damage to the epithelial lining. Using a human model, we were able to investigate these mechanisms in the human gut exposed to ischaemia-reperfusion (IR) over the time course of 150 min. In 10 patients a part of jejunum, to be removed for surgical reasons, was selectively exposed to IR. Control tissue was collected, as well as tissue exposed to 30 min of ischaemia with 0, 30 or 120 min of reperfusion. Haematoxylin/eosin staining demonstrated the appearance of subepithelial spaces following 30 min of ischaemia, while the epithelial lining remained intact at this stage. Western blot for myosin light chain kinase (MLCK) revealed a significant increase in protein levels after ischaemia (p < 0.01), and selective staining of MLCK and phosphorylated MLC (pMLC) in lamina propria muscle fibres indicated that appearance of subepithelial spaces was a consequence of active villus contraction. Early during reperfusion, accumulation of pMLC was observed exclusively at the basal side of enterocytes that had lost contact with the collagen-IV-positive basement membrane. These epithelial sheets were pulled together like a zipper, even before these cells were shed. This constriction, verified by increased F-actin and pMLC double staining, accounted for a 45% reduction in virtual wound surface (p < 0.001) at 30 min of reperfusion. In addition, these mechanisms were involved in resealing remaining small epithelial defects, resulting in a fully restored epithelial lining within 120 min of reperfusion. In conclusion, we show in a human in vivo model that the human jejunum has the ability to preserve the epithelial lining during intestinal IR by rapid lamina propria contraction and zipper-like constriction of epithelial cells that are to be shed into the lumen. These newly described phenomena limit exposure to noxious luminal content.
Collapse
Affiliation(s)
- Joep Grootjans
- Department of Surgery, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
| | | | | | | | | | | |
Collapse
|
21
|
Piton G, Manzon C, Cypriani B, Carbonnel F, Capellier G. Acute intestinal failure in critically ill patients: is plasma citrulline the right marker? Intensive Care Med 2011; 37:911-7. [PMID: 21400011 DOI: 10.1007/s00134-011-2172-x] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Accepted: 01/29/2011] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Small bowel functions are more complex than colon functions, and short bowel conditions are associated with increased mortality. Gastrointestinal dysfunction in critically ill patients is common, probably underestimated, and associated with a poor prognosis. However, a validated definition of acute intestinal failure is lacking, in absence of a marker to measure it. Consequently, small bowel dysfunction is not clearly integrated into the overall approach used to treat ICU patients. MATERIALS AND METHODS Review of the literature on gastrointestinal dysfunction in critically ill patients, and proposition of a definition of acute intestinal failure. CONCLUSION On the one hand, small bowel ischemia is related to acute reduction of enterocyte mass and loss of gut barrier function by epithelial lifting of villi. On the other hand, systemic inflammatory response syndrome (SIRS) and sepsis could be linked to an acute dysfunction of enterocytes without enterocyte reduction. Citrulline is an amino acid mainly synthesized by small bowel enterocytes. Various contexts of chronic and acute reduction of enterocyte mass have been correlated with low plasma citrulline concentration. Critically ill patients with shock have an acute reduction of enterocyte mass and reduced gut citrulline synthesis, leading to a low plasma citrulline concentration. Acute intestinal failure could be defined as an acute reduction of enterocyte mass and/or acute dysfunction of enterocytes, associated or not with loss of gut barrier function. The influence of SIRS and acute renal failure on plasma citrulline concentration and the value of this concentration as an indicator of acute intestinal failure in critically ill patients must be further evaluated.
Collapse
Affiliation(s)
- Gaël Piton
- Intensive Care Unit, Besançon University Hospital, Besançon, France.
| | | | | | | | | |
Collapse
|