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McCoy R, Oldroyd S, Yang W, Wang K, Hoven D, Bulmer D, Zilbauer M, Owens RM. In Vitro Models for Investigating Intestinal Host-Pathogen Interactions. Adv Sci (Weinh) 2024; 11:e2306727. [PMID: 38155358 PMCID: PMC10885678 DOI: 10.1002/advs.202306727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/01/2023] [Indexed: 12/30/2023]
Abstract
Infectious diseases are increasingly recognized as a major threat worldwide due to the rise of antimicrobial resistance and the emergence of novel pathogens. In vitro models that can adequately mimic in vivo gastrointestinal physiology are in high demand to elucidate mechanisms behind pathogen infectivity, and to aid the design of effective preventive and therapeutic interventions. There exists a trade-off between simple and high throughput models and those that are more complex and physiologically relevant. The complexity of the model used shall be guided by the biological question to be addressed. This review provides an overview of the structure and function of the intestine and the models that are developed to emulate this. Conventional models are discussed in addition to emerging models which employ engineering principles to equip them with necessary advanced monitoring capabilities for intestinal host-pathogen interrogation. Limitations of current models and future perspectives on the field are presented.
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Affiliation(s)
- Reece McCoy
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeCB3 0ASUK
| | - Sophie Oldroyd
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeCB3 0ASUK
| | - Woojin Yang
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeCB3 0ASUK
- Wellcome‐MRC Cambridge Stem Cell InstituteUniversity of CambridgeCambridgeCB2 0AWUK
| | - Kaixin Wang
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeCB3 0ASUK
| | - Darius Hoven
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeCB3 0ASUK
| | - David Bulmer
- Department of PharmacologyUniversity of CambridgeCambridgeCB2 1PDUK
| | - Matthias Zilbauer
- Wellcome‐MRC Cambridge Stem Cell InstituteUniversity of CambridgeCambridgeCB2 0AWUK
| | - Róisín M. Owens
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeCB3 0ASUK
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Jaafar MH, Xu P, Mageswaran UM, Balasubramaniam SD, Solayappan M, Woon JJ, Teh CSJ, Todorov SD, Park YH, Liu G, Liong MT. Constipation anti-aging effects by dairy-based lactic acid bacteria. J Anim Sci Technol 2024; 66:178-203. [PMID: 38618031 PMCID: PMC11007456 DOI: 10.5187/jast.2023.e93] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/24/2023] [Accepted: 09/01/2023] [Indexed: 04/16/2024]
Abstract
Constipation, which refers to difficulties in defecation and infrequent bowel movement in emptying the gastrointestinal system that ultimately produces hardened fecal matters, is a health concern in livestock and aging animals. The present study aimed to evaluate the potential effects of dairy-isolated lactic acid bacteria (LAB) strains to alleviate constipation as an alternative therapeutic intervention for constipation treatment in the aging model. Rats were aged via daily subcutaneous injection of D-galactose (600 mg/body weight [kg]), prior to induction of constipation via oral administration of loperamide hydrochloride (5 mg/body weight [kg]). LAB strains (L. fermentum USM 4189 or L. plantarum USM 4187) were administered daily via oral gavage (1 × 10 Log CFU/day) while the control group received sterile saline. Aged rats as shown with shorter telomere lengths exhibited increased fecal bulk and soften fecal upon administration of LAB strains amid constipation as observed using the Bristol Stool Chart, accompanied by a higher fecal moisture content as compared to the control (p < 0.05). Fecal water-soluble metabolite profiles showed a reduced concentration of threonine upon administration of LAB strains compared to the control (p < 0.05). Histopathological analysis also showed that the administration of LAB strains contributed to a higher colonic goblet cell count as compared to the control (p < 0.05). The present study illustrates the potential of dairy-sourced LAB strains as probiotics to ameliorate the adverse effect of constipation amid aging, and as a potential dietary intervention strategy for dairy foods including yogurt and cheese.
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Affiliation(s)
- Mohamad Hafis Jaafar
- Bioprocess Technology, School of
Industrial Technology, Universiti Sains Malaysia, Penang
11800, Malaysia
| | - Pei Xu
- Bioprocess Technology, School of
Industrial Technology, Universiti Sains Malaysia, Penang
11800, Malaysia
- Faculty of Cuisine, Sichuan Tourism
University, Chengdu 610100, China
| | - Uma-Mageswary Mageswaran
- Bioprocess Technology, School of
Industrial Technology, Universiti Sains Malaysia, Penang
11800, Malaysia
| | | | | | - Jia-Jie Woon
- Department of Medical Microbiology,
Faculty of Medicine, University of Malaya, Kuala Lumpur 50603,
Malaysia
| | - Cindy Shuan-Ju Teh
- Department of Medical Microbiology,
Faculty of Medicine, University of Malaya, Kuala Lumpur 50603,
Malaysia
| | - Svetoslav Dimitrov Todorov
- ProBacLab, Department of Food Science and
Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of
Sao Paulo, Sao Paulo 05508-090, Brazil
| | | | - Guoxia Liu
- CAS Key Laboratory of Microbial
Physiological and Metabolic Engineering, State Key Laboratory of Microbial
Resources, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100864, China
- CAS-TWAS Centre of Excellence for
Biotechnology, Beijing 100101, China
| | - Min-Tze Liong
- Bioprocess Technology, School of
Industrial Technology, Universiti Sains Malaysia, Penang
11800, Malaysia
- Renewable Biomass Transformation
Cluster, School of Industrial Technology, Universiti Sains
Malaysia, Penang 11800, Malaysia
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Milde AM, Rød AMK, Brekke S, Gjøen H, Mesfin G, Murison R. Does a single exposure to social defeat render rats more vulnerable to chemically induced colitis than brief inescapable foot-shocks? PLoS One 2022; 17:e0263802. [PMID: 36001557 PMCID: PMC9401109 DOI: 10.1371/journal.pone.0263802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 08/01/2022] [Indexed: 11/18/2022] Open
Abstract
All mammals are to different degrees exposed to stressors being physical or social, which may affect health and well-being. Stressful and traumatic situations have direct effects on immune responses that may alter susceptibility to developing somatic illnesses. In animal research, different types of stressors have been investigated in studying the effect on bowel disorders, some stressors being more or less of environmental origin. We aimed, therefore, to explore whether a more natural stressor would differ from a stressor of more unnatural characteristics on dextran sulphate sodium (DSS) induced colitis in adult rats. Specifically, whether social stress within a single social defeat (SD) paradigm would be a more potent stressor than brief inescapable foot-shocks (IFS) in causing elevated faecal granulocyte marker protein (GMP), and crypt- and inflammation scores in colonic tissue. Three groups of male Wistar rats were used; socially defeated rats; inescapable foot-shock rats; and comparison rats. Main findings showed no difference between the groups on GMP levels. However, there was a significant difference on inflammation and crypt scores for the distal part of colon, detected through histology, where socially defeated rats were more susceptible. A single SD seems to be more adverse than inescapable foot-shock on DSS induced colitis, but further studies are recommended to validate a broader range of different outcomes comparing two such different rodent stress models.
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Affiliation(s)
- Anne Marita Milde
- Regional Centre for Child and Youth Mental Health and Child Welfare, Norwegian Research Centre, NORCE, Bergen, Norway
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
| | - Anne Marie Kinn Rød
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
- * E-mail:
| | - Silvia Brekke
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
| | - Hedda Gjøen
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
| | - Ghenet Mesfin
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
| | - Robert Murison
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
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Konopelski P, Mogilnicka I. Biological Effects of Indole-3-Propionic Acid, a Gut Microbiota-Derived Metabolite, and Its Precursor Tryptophan in Mammals' Health and Disease. Int J Mol Sci 2022; 23:1222. [PMID: 35163143 DOI: 10.3390/ijms23031222] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/19/2022] [Accepted: 01/19/2022] [Indexed: 02/06/2023] Open
Abstract
Actions of symbiotic gut microbiota are in dynamic balance with the host’s organism to maintain homeostasis. Many different factors have an impact on this relationship, including bacterial metabolites. Several substrates for their synthesis have been established, including tryptophan, an exogenous amino acid. Many biological processes are influenced by the action of tryptophan and its endogenous metabolites, serotonin, and melatonin. Recent research findings also provide evidence that gut bacteria-derived metabolites of tryptophan share the biological effects of their precursor. Thus, this review aims to investigate the biological actions of indole-3-propionic acid (IPA), a gut microbiota-derived metabolite of tryptophan. We searched PUBMED and Google Scholar databases to identify pre-clinical and clinical studies evaluating the impact of IPA on the health and pathophysiology of the immune, nervous, gastrointestinal and cardiovascular system in mammals. IPA exhibits a similar impact on the energetic balance and cardiovascular system to its precursor, tryptophan. Additionally, IPA has a positive impact on a cellular level, by preventing oxidative stress injury, lipoperoxidation and inhibiting synthesis of proinflammatory cytokines. Its synthesis can be diminished in the presence of different risk factors of atherosclerosis. On the other hand, protective factors, such as the introduction of a Mediterranean diet, tend to increase its plasma concentration. IPA seems to be a promising new target, linking gut health with the cardiovascular system.
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Stamatopoulos K, O'Farrell C, Simmons M, Batchelor H. In vivo models to evaluate ingestible devices: Present status and current trends. Adv Drug Deliv Rev 2021; 177:113915. [PMID: 34371085 DOI: 10.1016/j.addr.2021.113915] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/27/2021] [Accepted: 08/02/2021] [Indexed: 12/12/2022]
Abstract
Evaluation of orally ingestible devices is critical to optimize their performance early in development. Using animals as a pre-clinical tool can provide useful information on functionality, yet it is important to recognize that animal gastrointestinal physiology, pathophysiology and anatomy can differ to that in humans and that the most suitable species needs to be selected to inform the evaluation. There has been a move towards in vitro and in silico models rather than animal models in line with the 3Rs (Replacement, Reduction and Refinement) as well as the better control and reproducibility associated with these systems. However, there are still instances where animal models provide the greatest understanding. This paper provides an overview of key aspects of human gastrointestinal anatomy and physiology and compares parameters to those reported in animal species. The value of each species can be determined based upon the parameter of interest from the ingested device when considering the use of pre-clinical animal testing.
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Affiliation(s)
- Konstantinos Stamatopoulos
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; Biopharmaceutics, Pharmaceutical Development, PDS, MST, RD Platform Technology & Science, GSK, David Jack Centre, Park Road, Ware, Hertfordshire SG12 0DP, UK
| | - Connor O'Farrell
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Mark Simmons
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Hannah Batchelor
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral Street, Glasgow G4 0RE, UK.
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Adamkova P, Hradicka P, Gancarcikova S, Kassayova M, Ambro L, Bertkova I, Maronek M, Farkasova Iannaccone S, Demeckova V. Single Donor FMT Reverses Microbial/Immune Dysbiosis and Induces Clinical Remission in a Rat Model of Acute Colitis. Pathogens 2021; 10:152. [PMID: 33540919 DOI: 10.3390/pathogens10020152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/27/2021] [Accepted: 01/28/2021] [Indexed: 12/14/2022] Open
Abstract
Deviation in the gut microbial composition is involved in various pathologies, including inflammatory bowel disease (IBD). Faecal microbiota transplant (FMT) can act as a promising approach to treat IBD by which changes in microbiome can be reversed and homeostasis restored. Therefore, the aim of this study was to investigate the effect of FMT on the remission of acute inflammatory response using dextran sulfate sodium (DSS)-induced rat colitis model. Faecal microbial communities were analysed using the 16S rRNA approach, and clinical manifestations together with histological/haematological/biochemical/immunological analyses were assessed. Our study demonstrated significant shifts in the dominant species of microbiota under inflammatory conditions induced by DSS and evident restoration effect of FMT treatment on microbial composition. These faecal microbial alterations in FMT-treated rats led to a relative restoration of colon length, and a significant decrease in both epithelium damage and disease severity, which was reflected in lower serum pro-inflammatory cytokine levels. Haematological/biochemical parameters in DSS-treated animals showed signs of anaemia with a significant reduction in red blood cell count together with increasing levels of total bilirubin, creatinine and phosphorus suggesting potential protective effect of FMT. These results support FMT as a valuable therapeutic strategy to control inflammation during acute colitis.
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Schieffer KM, Poritz LS, Yochum GS, Koltun WA. Development of a total colectomy and ileorectal anastomosis rat model to evaluate colonic metaplasia. J Surg Res 2017; 218:217-225. [PMID: 28985852 DOI: 10.1016/j.jss.2017.05.120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/16/2017] [Accepted: 05/25/2017] [Indexed: 11/20/2022]
Abstract
BACKGROUND Ulcerative colitis is an idiopathic inflammatory condition of the colon that may require surgical intervention including proctocolectomy and either ileal pouch-anal anastomosis or in the pediatric population, low ileorectal anastomosis (IRA). Often, subsequent physiologic alteration (or colonic metaplasia) occurs in the anastomosed small bowel that includes changes in mucin content, villous blunting, and increased expression of WNT5A, a marker of colonic crypt regeneration. We developed a rat low IRA model to assess and study the development of colonic metaplasia. MATERIALS AND METHODS We subjected male Sprague-Dawley rats (n = 17) to total colectomy and low IRA surgery and evaluated healing periodically by endoscopic evaluation. The ileum upstream of the anastomosis was assessed by hematoxylin and eosin staining, and the mucin content was measured by high iron diamine-Alcian blue staining. Wnt5a transcripts were quantified by reverse transcription and quantitative polymerase chain reaction at the 8-wk study end point. RESULTS Although no gross endoscopic evidence of inflammation was seen throughout the course of the study, colonic metaplasia in the small bowel was detected in 7 out of 10 (70%) rats at the study end point. In rats with colonic metaplasia, enhanced expression of Wnt5a was evident at the study end point compared to levels in the terminal ileum at the time of surgery. CONCLUSIONS Within 4-8 wk, the majority of rats subjected to IRA developed colonic metaplasia defined by villous blunting, changes in mucin content, and increased expression of Wnt5a. This model provides a method to study small bowel colonic metaplasia.
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Affiliation(s)
- Kathleen M Schieffer
- Division of Colon and Rectal Surgery, Department of Surgery, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Lisa S Poritz
- Division of Colon and Rectal Surgery, Department of Surgery, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Gregory S Yochum
- Division of Colon and Rectal Surgery, Department of Surgery, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania; Department of Biochemistry & Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Walter A Koltun
- Division of Colon and Rectal Surgery, Department of Surgery, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania.
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Lorenzo-Zúñiga V, Boix J, Moreno de Vega V, Bon I, Marín I, Bartolí R. Endoscopic shielding technique with a newly developed hydrogel to prevent thermal injury in two experimental models. Dig Endosc 2017; 29:702-711. [PMID: 28294423 DOI: 10.1111/den.12864] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 03/07/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND AIM A newly developed hydrogel, applied through the endoscope as an endoscopic shielding technique (EndoSTech), is aimed to prevent deep thermal injury and to accelerate the healing process of colonic induced ulcers after therapeutic endoscopy. METHODS Lesions were performed in rats (n = 24) and pigs (n = 8). Rats were randomized to receive EndoSTech (eight rats each) with: saline (control), hyaluronic acid and product. In pigs, three ulcer sites were produced in each pig: endoscopic mucosal resection (EMR)-ulcer with prior saline injection (A; EMR-saline), EMR-saline plus EndoSTech with product (B; EMR-saline-P), and EMR with prior injection of product plus EndoSTech-P (C; EMR-P-P). At the end of the 14-day study, the same lesions were performed again in healthy mucosa to assess acute injury. Animals were sacrificed after 7 (rats) and 14 (pigs) days. Ulcers were macroscopically and histopathologically evaluated. Thermal injury (necrosis) was assessed with a 1-4 scale. RESULTS In rats, treatment with product improved mucosal healing comparing with saline and hyaluronic acid (70% vs 30.3% and 47.2%; P = 0.003), avoiding mortality (0% vs 50% and 25%; P = 0.038), and perforation (0% vs 100% and 33.3%; P = 0.02); respectively. In pigs, submucosal injection of product induced a marked trend towards a less deep thermal injury (C = 2.25-0.46 vs A and B = 2.75-0.46; P = 0.127). Mucosal healing rate was higher with product (B = 90.2-3.9%, C = 91.3-5.5% vs A = 73.1-12.6%; P = 0.002). CONCLUSIONS This new hydrogel demonstrates strong healing properties in preclinical models. In addition, submucosal injection of this product is able to avoid high thermal load of the gastrointestinal wall.
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Affiliation(s)
- Vicente Lorenzo-Zúñiga
- Endoscopy Unit, Germans Trias i Pujol University Hospital, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Jaume Boix
- Endoscopy Unit, Germans Trias i Pujol University Hospital, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Vicente Moreno de Vega
- Endoscopy Unit, Germans Trias i Pujol University Hospital, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Ignacio Bon
- Endoscopy Unit, Germans Trias i Pujol University Hospital, Barcelona, Spain.,Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
| | - Ingrid Marín
- Endoscopy Unit, Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Ramón Bartolí
- Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
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Lorenzo-Zúñiga V, Boix J, Moreno de Vega V, Bon I, Marín I, Bartolí R. Efficacy of platelet-rich plasma as a shielding technique after endoscopic mucosal resection in rat and porcine models. Endosc Int Open 2016; 4:E859-64. [PMID: 27540573 PMCID: PMC4988838 DOI: 10.1055/s-0042-109170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 05/23/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND STUDY AIMS The aims were to assess the efficacy of endoscopic application of Platelet-rich plasma (PRP) to prevent delayed perforation and to induce mucosal healing after endoscopic resections. PATIENTS AND METHODS Colonic induced lesions were performed in rats (n = 16) and pigs (n = 4). Animals were randomized to receive onto the lesions saline (control) or PRP. Animals underwent endoscopic follow-up. Thermal injury was assessed with a 1 - 4 scale: (1) mucosal necrosis; (2) submucosal necrosis; (3) muscularis propria necrosis; and (4) serosal necrosis RESULTS Saline treatment showed 50 % of mortality in rats (P = 0.02). Mean ulcerated area after 48 hours and 7 days was significantly smaller with PRP than with saline (0.27 ± 0.02 cm(2) and 0.08 ± 0.01 cm(2) vs. 0.56 ± 0.1 cm(2) and 0.40 ± 0.06 cm(2); P < 0.001). The incidence of thermal injury was significantly lower with PRP (1.25 ± 0.46) than in controls (2.25 ± 0.50); P = 0.006. The porcine model showed a trend toward higher mucosal restoration in animals treated with PRP than with saline at weeks 1 and 2 (Median area in cm(2): 0.55 and 0.40 vs. 1.32 and 0.79) CONCLUSIONS: Application of PRP to colonic mucosal lesions showed strong healing properties in rat and porcine models.
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Affiliation(s)
- Vicente Lorenzo-Zúñiga
- Endoscopy Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Jaume Boix
- Endoscopy Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Vicente Moreno de Vega
- Endoscopy Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Ignacio Bon
- Endoscopy Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Ingrid Marín
- Endoscopy Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Ramón Bartolí
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
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Lorenzo-Zúñiga V, Boix J, Moreno-de-Vega V, de-la-Ossa ND, Òdena G, Bartolí R. Microperforation of the colon: animal model in rats to reproduce mucosal thermal damage. J Surg Res 2014; 188:415-8. [PMID: 24560429 DOI: 10.1016/j.jss.2014.01.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 12/07/2013] [Accepted: 01/24/2014] [Indexed: 01/12/2023]
Abstract
BACKGROUND The aim of the present study was to develop a rat model of colonic microperforation secondary to thermal injury for future studies to assess new treatments. METHODS Twenty-four male Sprague-Dawley rats were used in this study. Hot biopsy forceps were used for all treatments. All lesions were created in proximal left colon using the soft coagulation setting. The power setting tested was 40 W, and the durations of monopolar soft coagulation application evaluated were 2, 3, and 4 s. RESULTS In the acute phase, 48 h after thermal injury, durations of cautery of 2 and 3 s resulted in transmural necrosis, whereas with 4 s microperforation was obtained. In the late phase, 7 d after the damage, only duration of cautery of 4 s showed deep cautery effects, with signs of peritonitis. CONCLUSIONS We determined optimal power settings and duration of therapy in a rat model for producing electrocautery that involves transmural necrosis with microperforation.
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Affiliation(s)
- Vicente Lorenzo-Zúñiga
- Endoscopy Unit, Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain.
| | - Jaume Boix
- Endoscopy Unit, Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | - Vicente Moreno-de-Vega
- Endoscopy Unit, Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | - Napoleón D de-la-Ossa
- Department of Pathology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | - Gemma Òdena
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain; Institut Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
| | - Ramon Bartolí
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain; Institut Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
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