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Tesena P, Vinijkumthorn R, Preuksathaporn T, Piyakul P, Chotikaprakal T, Sirireugwipas R, Wong-Aree K, Prapaiwan N. Evaluation of gastrointestinal tract lesions and serum malondialdehyde levels after repeated oral administration of phenylbutazone in horses. Vet Res Commun 2024; 48:2343-2355. [PMID: 38771448 PMCID: PMC11315746 DOI: 10.1007/s11259-024-10415-y] [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: 02/10/2024] [Accepted: 05/15/2024] [Indexed: 05/22/2024]
Abstract
Phenylbutazone (PBZ) is a widely used nonsteroidal anti-inflammatory drug for horses. However, because of its gastrointestinal side effects, its administration requires careful attention in veterinary practice. Malondialdehyde (MDA) is a serum biomarker associated with increased damage to the equine gastrointestinal system. This study investigated the hematological effects and alterations in the gastrointestinal tract and assessed serum MDA concentrations following repeated oral PBZ administration at clinical doses. Fourteen horses were randomly divided into control and treatment groups. All horses in the treatment group were administered 4.4 milligrams per kilogram of body weight of PBZ syrup orally twice a day for 7 days, whereas the control group received syrup as a placebo. The development of gastrointestinal side effects was investigated using gastroscopy, abdominal ultrasound, and fecal pH; serum MDA concentrations were assessed using a commercially available enzyme-linked immunosorbent assay kit. Data were compared between PBZ-treated and control horses before and after the treatment period. The treatment group exhibited decreased albumin and total protein concentrations. Moreover, this group exhibited a higher thickness of the right dorsal colon wall (p = 0.03) and had higher scores for squamous gastric ulcers (p = 0.01). Fecal pH was lower in the treatment group than in the control group after PBZ administration (p < 0.01). Although MDA concentrations were higher in the treatment group after PBZ administration, they did not differ significantly from those of the control group. This study highlighted the changes in hematological and gastrointestinal lesions resulting from PBZ administration in horses at clinical doses, even without clinical signs. However, MDA may not be an optimal biomarker for the early detection of gastrointestinal damage due to PBZ treatment in horses.
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Affiliation(s)
- Parichart Tesena
- Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Ruethaiwan Vinijkumthorn
- Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom, 73170, Thailand
| | | | - Poonnada Piyakul
- Faculty of Veterinary Science, Mahidol University, Nakhon Pathom, 73170, Thailand
| | | | | | - Kanokpich Wong-Aree
- Veterinary and Remount Department, Royal Thai Army Animal Hospital, Nakhon Pathom, 73000, Thailand
| | - Nawarus Prapaiwan
- Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom, 73170, Thailand.
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Williams Louie E, Nieto J, Wensley F, Morgan JM, Finno CJ, Berryhill EH. Efficacy of the oral supplement, Equine Omega Complete, for the prevention of gastric ulcers and alpha-tocopherol supplementation in horses. J Vet Intern Med 2023; 37:2529-2534. [PMID: 37775973 PMCID: PMC10658587 DOI: 10.1111/jvim.16877] [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: 06/30/2022] [Accepted: 09/11/2023] [Indexed: 10/01/2023] Open
Abstract
BACKGROUND Omega-3 fatty acid and alpha-tocopherol supplementation reduces gastric ulcer formation in humans and rodents; however, efficacy of prevention in horses is unknown. Equine Omega Complete (EOC) is an oral supplement containing omega-3 fatty acids and alpha-tocopherol. HYPOTHESIS/OBJECTIVE Determine if EOC supplementation prevents gastric ulcers and increases serum alpha-tocopherol concentrations in healthy horses. ANIMALS Nine thoroughbred geldings; 5-13 years old. METHODS Prospective randomized block design, repeated in crossover model. Horses were administered EOC, omeprazole, or water PO for 28 days. Horses underwent an established gastric ulcer induction protocol from days 21-28 via intermittent feed deprivation. Gastroscopies were performed on days 0, 21, and 28. Serum alpha-tocopherol concentrations were measured on days 0 and 28. The effects of treatment and time on ulcer grades were assessed with ordinal logistic regression, with significance at P-value <.05. RESULTS Ulcer grades increased during ulcer induction in control and EOC but not omeprazole groups (P = .02). Grades increased in EOC-treated horses after ulcer induction from a median of 1 [95% confidence interval 0-2.5] (day 0) to 2.5 [1.5-3.5] (day 28) and were similar to the control group (P = .54). Serum alpha-tocopherol increased in EOC-treated horses from day 0 to day 28 (mean 2.2 ± 0.43 μg/mL to 2.96 ± 0.89 μg/mL; P < .001) with high individual variation; this increase was not different from omeprazole or control groups. CONCLUSION AND CLINICAL IMPORTANCE Supplementation with EOC for 28 days did not prevent gastric ulcer formation nor increase alpha-tocopherol concentrations relative to the control group.
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Affiliation(s)
- Elizabeth Williams Louie
- School of Veterinary Medicine, Veterinary Medical Teaching HospitalUniversity of California DavisDavisCaliforniaUSA
| | - Jorge Nieto
- Department of Veterinary Surgery and Radiological Sciences, School of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
| | - Fiona Wensley
- School of Veterinary Medicine, Veterinary Medical Teaching HospitalUniversity of California DavisDavisCaliforniaUSA
| | - Jessica M. Morgan
- Department of Medicine and Epidemiology, School of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
| | - Carrie J. Finno
- Department of Population Health and Reproduction, School of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
| | - Emily H. Berryhill
- Department of Medicine and Epidemiology, School of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
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Gharehaghajlou Y, Raidal SL, Freccero F, Padalino B. Effects of Transport and Feeding Strategies Before Transportation on Redox Homeostasis and Gastric Ulceration in Horses. J Equine Vet Sci 2023; 126:104268. [PMID: 36871793 DOI: 10.1016/j.jevs.2023.104268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 02/14/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023]
Abstract
Transportation may lead to oxidative stress (OS) and gastric ulceration in horses, and optimal feed management before, or during, transportation is unclear. This study aimed to evaluate the effects of transportation after three different feeding strategies on OS and to explore possible associations between OS and equine gastric ulcer syndrome (EGUS). Twenty-six mares were transported by truck for 12 hours without food or water. Horses were randomly divided into 3 groups; (1) fed 1 hour before departure (BD), (2) fed 6 hours BD, (3) fed 12 hours BD. Clinical examinations and blood collections were performed at approximately 4 hours BD (T0), at unloading (T1), 8 hours (T2) and 60 hours (T3) after unloading. Gastroscopy was conducted prior to departure, and at T1 and T3. Although OS parameters remained in the normal range, transportation was associated with increased reactive oxygen metabolites (ROMS) at unloading (P=0.004), with differences between horses fed 1 hour and 12 hours BD (P < .05). The level of total antioxidant (PTAS) was affected by both transportation and feeding strategy (P = 0.019), with horses fed 1 hour BD demonstrating greater PTAS at T = 0, and a different response in comparison with the other groups and the literature. Nine horses demonstrated clinically significant ulceration of the squamous mucosa at T1 but, although weak correlations were evident between OS parameters and ulcer scores, univariate logistic regression showed no associations. This study suggests that feed management prior to a long journey (12 hours) may affect oxidative balance. Further studies are needed to understand the nexus between feed management before and during transport, transport-related OS and EGUS.
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Affiliation(s)
- Yashar Gharehaghajlou
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Sharanne L Raidal
- School of Agricultural, Environmental and Veterinary Sciences, Charles Stuart University, Wagga, NSW, Australia
| | - Francesca Freccero
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia,Bologna, Italy
| | - Barbara Padalino
- Department of Agricultural and Food Sciences, University of Bologna, Bologna, Italy.
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Louie EW, Berryhill EH, Nieto J, Wensley F, Knych H, Finno CJ, Morgan JM. Changes in Heart Rate Variability with Induction of Gastric Ulcers in Adult Horses. J Equine Vet Sci 2023; 121:104192. [PMID: 36516894 DOI: 10.1016/j.jevs.2022.104192] [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: 08/31/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
Gastric ulceration can be induced by athletic training and is a significant welfare concern. The objective of this study was to evaluate the effect of gastric ulcer induction on heart rate variability (HRV) in the horse. We hypothesized that induction of gastric ulcers would decrease HRV and increase low frequency fluctuations, consistent with increased sympathetic tone. A convenience sample of 8 horses in a larger study were enrolled. Horses were randomly assigned to receive water or 2 mg/kg omeprazole orally once daily for 28 days. Gastric ulcers were induced through intermittent feed withholding on days 21 to 28. Gastroscopy was performed and gastric ulcers were graded (0-IV) by three blinded reviewers on days 21 and 28. Continuous electrocardiograms were obtained for one hour at the start and end of ulcer induction. HRV was assessed in 1-hour recordings for time domain variables and 5 minute sections for frequency domain analysis. HRV and ulcer grade across treatments were compared by a mixed effect model, with treatment and time as fixed effects and horse as a random effect. Gastric ulcer grade increased with induction protocol (P < .0001) and decreased with omeprazole treatment (P = .0007). Omeprazole treatment increased R-R intervals (P = .01) and decreased ratio of low frequency/high frequency signal (P = .008) as compared to horses receiving water. This was attributable to decreasing low frequency fluctuations (P = .05). While limited by the small sample size (four horses/treatment), this study suggests that omeprazole treatment decreases heart rate, and LF/HF ratio during ulcer induction, consistent with a decrease in sympathetic tone.
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Affiliation(s)
- Elizabeth Williams Louie
- School of Veterinary Medicine, Veterinary Medical Teaching Hospital, University of California-Davis, Davis, CA
| | - Emily H Berryhill
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA
| | - Jorge Nieto
- Department of Radiological and Surgical Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA
| | - Fiona Wensley
- School of Veterinary Medicine, Veterinary Medical Teaching Hospital, University of California-Davis, Davis, CA
| | - Heather Knych
- K.L. Maddy Equine Analytical Pharmacology Laboratory, School of Veterinary Medicine, University of California, Davis, CA; Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA
| | - Carrie J Finno
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California-Davis, Davis, CA
| | - Jessica M Morgan
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA.
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Lo Feudo CM, Stucchi L, Conturba B, Stancari G, Zucca E, Ferrucci F. Equine Gastric Ulcer Syndrome affects fitness parameters in poorly performing Standardbred racehorses. Front Vet Sci 2022; 9:1014619. [PMID: 36504861 PMCID: PMC9732101 DOI: 10.3389/fvets.2022.1014619] [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: 08/08/2022] [Accepted: 11/11/2022] [Indexed: 11/27/2022] Open
Abstract
Introduction Equine Gastric Ulcer Syndrome (EGUS) is a highly prevalent disorder in horses, which can be classified, based on the localization of the lesions, as Equine Squamous Gastric Disease (ESGD) or Equine Glandular Gastric Disease (EGGD). Although EGUS is recognized as a common cause of poor performance in racehorses, objective investigations about its relation with athletic capacity are lacking. Therefore, the present retrospective study aims to evaluate the associations between EGUS severity and some fitness parameters measured during an incremental treadmill test in Standardbred racehorses in training. Methods With this aim, data from 87 Standard bred racehorses which underwent a complete diagnostic evaluation for poor performance was reviewed. During gastroscopic examination, a 0-4 score was assigned to ESGD, while EGGD was evaluated for absence/presence; a total EGUS score was obtained by adding 1 point to ESGD score in horses showing concomitant EGGD. Fitness parameters obtained during incremental treadmill test included speed at a heart rate of 200 bpm (V200), speed and heart rate at a blood lactate of 4 mmol/L (VLa4, HRLa4), peak lactate, lactate and heart rate at 30 minutes post-exercise, maximum speed, minimum pH and maximum hematocrit. The associations between fitness parameters and EGUS and ESGD scores were evaluated by Spearman correlation, while Mann-Whitney test was used to compare them between horses with or without EGGD. Statistical significance was set at p<0.05. Results EGUS grade was inversely correlated with V200 (p = 0.0025) and minimum pH (p = 0.0469); ESGD grade was inversely correlated with V200 (p = 0.0025) and VLa4 (p = 0.0363). Although a trend was observed, no significant differences in V200 were observed between horses with or without EGGD (p = 0.073); horses with EGGD reached a lower minimum pH (p = 0.0087). Discussion These results show a negative association between aerobic capacity and EGUS, in particular ESGD. Although different hypotheses have been proposed, including abdominal pain and decreased appetite due to lactate accumulation, the underlying mechanisms are still unknown, and it is not clear whether EGUS represents a cause or a consequence of an early lactate accumulation and post-exercise acidosis.
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Affiliation(s)
- Chiara Maria Lo Feudo
- Equine Sports Medicine Laboratory “Franco Tradati”, Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Lodi, Italy
| | - Luca Stucchi
- Veterinary Teaching Hospital, Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Lodi, Italy,*Correspondence: Francesco Ferrucci
| | - Bianca Conturba
- Veterinary Teaching Hospital, Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Lodi, Italy
| | - Giovanni Stancari
- Veterinary Teaching Hospital, Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Lodi, Italy
| | - Enrica Zucca
- Equine Sports Medicine Laboratory “Franco Tradati”, Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Lodi, Italy
| | - Francesco Ferrucci
- Equine Sports Medicine Laboratory “Franco Tradati”, Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Lodi, Italy,Luca Stucchi
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Dahmen K, Fischer H, Burczynski V, Albanese V, Muñoz E. Four cases of stomach perforation in adult horses. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Katrin Dahmen
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Holger Fischer
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Victoria Burczynski
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Valeria Albanese
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Encarnación Muñoz
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
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7
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Bishop RC, Kemper AM, Wilkins PA, McCoy AM. Effect of omeprazole and sucralfate on gastrointestinal injury in a fasting/NSAID model. Equine Vet J 2021; 54:829-837. [PMID: 34719063 DOI: 10.1111/evj.13534] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 09/10/2021] [Accepted: 10/18/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Equine gastric ulcer syndrome (EGUS) is a common and significant cause of morbidity in horses, with a range of clinical signs, including inappetence, colic and poor performance. Hospitalised horses are exposed to factors that may induce EGUS, including fasting and nonsteroidal anti-inflammatory drug (NSAID) administration, and may be at risk for development of squamous (ESGD) and glandular gastric disease (EGGD). Prophylactic anti-ulcer medication is often prescribed for these patients, but drug selection is complicated by different aetiology and response to treatment of ESGD and EGGD. OBJECTIVES To establish the efficacy of sucralfate or omeprazole used prophylactically in horses exposed to a combined feed-fast and NSAID administration EGUS induction protocol. We hypothesised that these drugs would be equally effective for prevention of gastric lesions in the experimental cohort. STUDY DESIGN Randomised crossover experimental design. METHODS Horses (n = 14) received either omeprazole (1 mg/kg PO q24h) or sucralfate (20 mg/kg PO q8h) while undergoing the feed-fast/NSAID protocol, allowed an 8-week washout period, and then administered the alternate treatment. Serial gastroscopy, ultrasound and haematology documented treatment effects. RESULTS ESGD and EGGD score increased over time under both treatments. There was a significant effect of treatment on EGGD scores (P < .001), with post-treatment EGGD scores higher for horses receiving sucralfate (median 3; IQR 2.25,3) than omeprazole (1; 1,1). The effect of treatment on ESGD scores just achieved significance (P = .05), with post-treatment ESGD scores higher for sucralfate (4; 3,4) than omeprazole (2; 2,3). MAIN LIMITATIONS This study was performed in healthy horses, and response to treatment may differ in horses with clinical illness. Additional investigation in a larger population may be required to detect significant differences in other clinical parameters. CONCLUSIONS Omeprazole was superior to sucralfate for mitigating gastric lesion severity in healthy horses exposed to a feed-fast/NSAID model.
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Affiliation(s)
- Rebecca C Bishop
- Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois, USA
| | - Ann M Kemper
- Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois, USA
| | - Pamela A Wilkins
- Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois, USA
| | - Annette M McCoy
- Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois, USA
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Lo Feudo CM, Stucchi L, Conturba B, Alberti E, Zucca E, Ferrucci F. Effects of a nutraceutical supplement in the management of mild equine squamous gastric disease in endurance horses. Vet Rec 2021; 189:e942. [PMID: 34562281 DOI: 10.1002/vetr.942] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 08/02/2021] [Accepted: 08/28/2021] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Equine squamous gastric disease (ESGD) may require prolonged treatments with acid suppressants; therefore, interest in nutraceutical supplements with anti-ulcerogenic properties has increased. This study aims to investigate the efficacy of Trophogast pellet for the treatment of ESGD in endurance horses. MATERIAL AND METHODS Fifteen endurance horses were included based on their gastroscopic examination and randomly assigned to a treatment group, receiving Trophogast pellet for 30 days together with management changes, or to a control group, only subjected to management modifications. At the end of treatment, gastroscopy was repeated. Scores were assigned according to the Equine Gastric Ulcer Council scoring system. All horses were weighed at the beginning and at the end of the study. ESGD grades and weight before and after treatment were compared. RESULTS At enrolment, median ESGD score in the treatment group was 2, while in the control group it was 1. After the treatment period, a significant decrease in ESGD grade was observed in the treatment group (median 1, p = 0.0078), while there was no change in the control group (median 2). No significant weight change was observed in either group. CONCLUSION Trophogast pellet was effective at promoting healing of mild ESGD in endurance horses.
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Affiliation(s)
- Chiara Maria Lo Feudo
- Department of Veterinary Medicine, Equine Sports Medicine Laboratory "Franco Tradati", Università degli Studi di Milano, Lodi, Italy
| | - Luca Stucchi
- Veterinary Teaching Hospital, Università degli Studi di Milano, Lodi, Italy
| | - Bianca Conturba
- Veterinary Teaching Hospital, Università degli Studi di Milano, Lodi, Italy
| | - Elena Alberti
- Department of Veterinary Medicine, Equine Sports Medicine Laboratory "Franco Tradati", Università degli Studi di Milano, Lodi, Italy
| | - Enrica Zucca
- Department of Veterinary Medicine, Equine Sports Medicine Laboratory "Franco Tradati", Università degli Studi di Milano, Lodi, Italy
| | - Francesco Ferrucci
- Department of Veterinary Medicine, Equine Sports Medicine Laboratory "Franco Tradati", Università degli Studi di Milano, Lodi, Italy
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Finley CJ, Fischer AT. Removal of equine cryptorchid testes through an enlarged umbilical portal in dorsally recumbent horses after intra-abdominal laparoscopic castration. Equine Vet J 2021; 54:703-709. [PMID: 34110643 DOI: 10.1111/evj.13483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 04/29/2021] [Accepted: 05/28/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Laparoscopic removal of cryptorchid testes has been routinely reported through enlarged parainguinal incisions in dorsally recumbent horses. Outcomes following removal through an extended umbilical incision have not been previously reported. OBJECTIVE To describe the surgical technique of removing cryptorchid testes in dorsally recumbent horses through an enlarged umbilical portal after laparoscopic intra-abdominal castration. STUDY DESIGN Retrospective case series. METHODS Medical records were reviewed for horses that underwent laparoscopic removal of unilateral or bilateral cryptorchid testes from January 2006 to December 2016. Horses were placed under general anaesthesia, positioned in dorsal recumbency and then tilted into Trendelenburg position. Cryptorchid testes were castrated by ligating loop application and/or electrosurgery. The umbilical portal incision was extended along the linea alba for testes removal. All descended testes were removed by routine closed castration with the scrotal incision left to heal by second intention. Perianaesthetic laboratory values, surgical procedure descriptions, surgery and anaesthesia times, and in-hospital perioperative complications were recorded. RESULTS A total of 79 horses, aged 1-14 years, with unilateral or bilateral cryptorchidism were included: 90 cryptorchid testes were successfully removed through an enlarged umbilical portal incision. Sixty-eight horses were unilaterally cryptorchid and 11 were bilaterally cryptorchid. Two horses had minor post-operative complications related to the extended umbilical portal incision. MAIN LIMITATIONS Retrospective nature of the study, no control population for comparison and no follow-up after hospital discharge. CONCLUSION An extended umbilical portal incision is a successful alternative to extending a parainguinal incision for testis removal after laparoscopic castration.
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Affiliation(s)
- B. W. Sykes
- School of Veterinary Sciences Massey University Palmerston North New Zealand
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11
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Camacho‐Luna P, Andrews FM, Keowen ML, Garza F, Liu C‐C, Lamp B, Olijve J. The effect of porcine hydrolysed collagen on gastric ulcer scores, gastric juice pH, gastrin and amino acid concentrations in horses. EQUINE VET EDUC 2020. [DOI: 10.1111/eve.13409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. Camacho‐Luna
- Equine Health Studies Program Department of Veterinary Clinical Sciences School of Veterinary Medicine Louisiana State University Baton Rouge LouisianaUSA
| | - F. M. Andrews
- Equine Health Studies Program Department of Veterinary Clinical Sciences School of Veterinary Medicine Louisiana State University Baton Rouge LouisianaUSA
| | - M. L. Keowen
- Equine Health Studies Program Department of Veterinary Clinical Sciences School of Veterinary Medicine Louisiana State University Baton Rouge LouisianaUSA
| | - F. Garza
- Equine Health Studies Program Department of Veterinary Clinical Sciences School of Veterinary Medicine Louisiana State University Baton Rouge LouisianaUSA
| | - C. ‐C. Liu
- Department of Veterinary Clinical Sciences School of Veterinary Medicine Louisiana State University Baton Rouge LouisianaUSA
| | - B. Lamp
- Sonac‐Darling Ingredients International Mukwonago Wisconsin USA
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12
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Galinelli N, Wambacq W, Broeckx BJG, Hesta M. High intake of sugars and starch, low number of meals and low roughage intake are associated with Equine Gastric Ulcer Syndrome in a Belgian cohort. J Anim Physiol Anim Nutr (Berl) 2019; 105 Suppl 2:18-23. [PMID: 31637798 DOI: 10.1111/jpn.13215] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 08/10/2019] [Accepted: 08/26/2019] [Indexed: 11/28/2022]
Abstract
Equine gastric ulcer syndrome (EGUS) is a pathological condition affecting the glandular and squamous regions of the stomach. It is characterized by non-specific clinical signs, behavioural changes or can also be found without any overt clinical manifestations. Nutritional factors such as intermittent feeding, high sugars and starch intake, large amounts of straw as forage and prolonged time without access to forage have all been associated with an increased risk of equine squamous gastric disease (ESGD). The aim of this study was to investigate which nutritional practices are commonly seen in clinical ESGD cases in Belgium. Medical records of 27 horses referred to the equine nutritional service at Ghent University (2013-2018) due to equine gastric ulcer lesions were reviewed. Twenty-one healthy horses referred for dietary evaluation during the same period were selected as control cases (CC). Dietary evaluation was performed on an individual basis. Forage/concentrate ratio on dry matter basis, forage content in the diet, total dietary sugars and starch intake per day and per meal were analysed. Retrospective descriptive and statistical analyses were performed. Significantly, higher amounts of forage intake (%DM per BW) in the CC vs. ESGD group were noted (p ≤ .05) with average values of 1.39 (SD ± 0.27) and 1.27 (SD ± 0.70) respectively. There were no significant differences for sugars and starch intake in g/kg BW/day (p = .18). However, the sugars and starch intake per meal (g/kg BW/meal) in the CC group (average value 1.06, SD ± 0.56) was significantly (p < .001) lower than in the EGUS group (average value 1.85 SD ± 0.78). Forage intake below the recommended absolute minimum value as well as high sugars and starch intake were most commonly associated with EGUS in the present case series. An adequate diet formulation taking into account these main nutritional factors is therefore essential to avoid gastric problems in horses.
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Affiliation(s)
- Nicolas Galinelli
- Laboratory of Animal Nutrition, Faculty of Veterinary Medicine, Ghent University, Gent, Belgium
| | - Wendy Wambacq
- Laboratory of Animal Nutrition, Faculty of Veterinary Medicine, Ghent University, Gent, Belgium
| | - Bart J G Broeckx
- Laboratory of Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Gent, Belgium
| | - Myriam Hesta
- Laboratory of Animal Nutrition, Faculty of Veterinary Medicine, Ghent University, Gent, Belgium
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Munsterman AS, Dias Moreira AS, Marqués FJ. Evaluation of a Chinese herbal supplement on equine squamous gastric disease and gastric fluid pH in mares. J Vet Intern Med 2019; 33:2280-2285. [PMID: 31441559 PMCID: PMC6766511 DOI: 10.1111/jvim.15603] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 08/07/2019] [Indexed: 11/30/2022] Open
Abstract
Background Wei Le San (WLS) is a Chinese herbal formula comprised of 9 herbs selected for their putative anti‐inflammatory effects. Objectives To evaluate the effects of WLS administration in horses with nonglandular gastric ulcers. Animals Ten mixed breed mares (aged 7‐21 years, 401‐567 kg body weight). Methods Experimental design was a blinded, prospective, 2‐period crossover study. All horses received a placebo (25 mL dextrose‐based syrup; n = 10) and the treatment (WLS, 5 g in 25 mL dextrose‐based syrup; n = 10), administered twice daily. Horses underwent a 1‐week, alternating feed‐deprivation period to induce or worsen existing ulcers; treatment began on day 7. Gastroscopic examination was performed on d0, d6, and d35, with gastric fluid pH obtained on d6 and d35. Gastric ulcer scores assigned by 3 masked observers were averaged for each examination. Results Ulcer number scores for horses treated with WLS (median = 0; range, 0‐4) was not different from the untreated controls (median = 0.5; range, 0‐4; P = .81) by the end of the treatment period. Ulcer severity score for treated horses (median = 0; range, 0‐1) was also unchanged compared to the control group (median = 0.5; range, 0‐1; P = .85). Gastric pH was not altered by either treatment, with a median of 2.1 (range, 1.9‐4.1) for the horses treated with WLS and 2.8 (range, 1.6‐7.2) in the untreated controls (P = .46). Conclusions and Clinical Importance The experimental model used to induce gastric ulceration was unable to discern a difference between the herbal supplement and the placebo in normal horses.
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Affiliation(s)
- Amelia S Munsterman
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin
| | - Ana Sofia Dias Moreira
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin
| | - Fernando J Marqués
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin
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TESENA P, YINGCHUTRAKUL Y, ROYTRAKUL S, WONGTAWAN T, ANGKANAPORN K. Serum protein expression in Equine Glandular Gastric Disease (EGGD) induced by phenylbutazone. J Vet Med Sci 2019; 81:418-424. [PMID: 30674748 PMCID: PMC6451916 DOI: 10.1292/jvms.18-0679] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 01/14/2019] [Indexed: 12/18/2022] Open
Abstract
Equine Glandular Gastric Disease (EGGD) is a common disease in sport horses. This disease might be associated with usage of nonsteroidal anti-inflammatory drugs (NSAIDs) for treating inflammatory diseases. Although gastroscopy has been an effective method for diagnosis, but a less invasive, and inexpensive method is preferred. This study used proteomic technology to identify candidate serum proteins that might be used as markers of NSAIDs induced EGGD. Five Thoroughbred horses were given high doses of NSAID, phenylbutazone to treat lameness. The experiment was divided into three periods: (i) Pre-EGGD period, (ii) during EGGD period, and (iii) Post-EGGD period. Gastroscopy were used to diagnose EGGD, serum was collected to perform gel electrophoresis (1D SDS-PAGE) and mass spectrometry (LC-MS) in order to identify serum proteins in each group. The candidate serum proteins were computationally predicted for the interaction between phenylbutazone and proteins, tissue specific expression, and association to gastric ulceration. After EGGD induction, all horses showed clinical signs of colic with marked congestion and erosion appearing in the mucosa of the glandular stomach whereas no change was observed in the mucosa of non-glandular stomach. Our proteomic results identified 14 proteins that might be used as EGGD markers. These proteins were highly expressed in the glandular stomach and some proteins were associated with phenylbutazone or ulcer development. However, confirmation of these candidate marker proteins is required with specific antibodies in the larger horse population before they can be considered for application in the field.
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Affiliation(s)
- Parichart TESENA
- Graduate Program in Animal Physiology, Department of Veterinary Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330,
Thailand
- Department of Clinical Science and Public Health, Faculty of Veterinary Science, Mahidol University, Salaya, Puttamonthon, Nakhon Pathom 73170, Thailand
| | - Yodying YINGCHUTRAKUL
- Proteomics Research Laboratory, Genome Technology Research Unit, National Center for Genetics Engineering and Biotechnology, Pathum Thani 12120, Thailand
| | - Sittiruk ROYTRAKUL
- Proteomics Research Laboratory, Genome Technology Research Unit, National Center for Genetics Engineering and Biotechnology, Pathum Thani 12120, Thailand
| | - Tuempong WONGTAWAN
- Department of Pre-clinical and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Salaya, Puttamonthon, Nakhon Pathom 73170,
Thailand
| | - Kris ANGKANAPORN
- Department of Veterinary Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
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Sauer FJ, Bruckmaier RM, Ramseyer A, Vidondo B, Scheidegger MD, Gerber V. Diagnostic accuracy of post-ACTH challenge salivary cortisol concentrations for identifying horses with equine glandular gastric disease. J Anim Sci 2018; 96:2154-2161. [PMID: 29762691 DOI: 10.1093/jas/sky074] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 03/05/2018] [Indexed: 12/27/2022] Open
Abstract
The aims of this study were to better characterize the adrenal response to i.v. adrenocorticotropic hormone (ACTH) in horses with and without gastric disease and to validate and simplify the ACTH stimulation test by determining the diagnostic accuracy of six consecutive sampling time points after ACTH administration for equine glandular gastric disease (EGGD) and equine squamous gastric disease (ESGD). Twenty-six endurance and eventing horses without clinical disease [Sport Horse Population (SHP)] and an independent population of 62 horses [General Population (GP)] were grouped by gastroscopic findings (no/mild vs. moderate/severe EGGD, grade 0-1 vs. 2-4 ESGD, respectively) and underwent an ACTH stimulation test. Salivary cortisol (ng/mL) was analyzed before and 30, 60, 90, 120, and 150 min after i.v. injection of 1 µg/kg BW synthetic ACTH1-24. The association between having moderate or severe EGGD or ESGD and the amount of salivary cortisol was analyzed by means of receiver-operating characteristic (ROC) analysis. The following explanatory variables were considered: cortisol values for every time point, the area under the curve (AUC)-including all time points and corrected for the baseline-and the partial areas under the curve AUC0-90 and AUC90-150. Sampling after 60 min had highest association with moderate/severe EGGD. The diagnostic potential of the ACTH test was higher for the SHP [sensitivity 100% (95% CI 54% to 100%), specificity 75% (95% CI 51% to 91%), ROC-AUC 91% (95% CI 69% to 98%), 1-sided P-value < 0.001] than for the GP [sensitivity 75% (95% CI 48% to 93%), specificity 52% (95% CI 37% to 67%), ROC-AUC 68% (95% CI 51% to 79%), 1-sided P-value = 0.0064]. There were, however, no significant associations with ESGD. The superiority of sampling after 60 min suggests that the initial release of cortisol rather than its peak or the AUC are relevant regarding EGGD. Even though the wide confidence intervals and thus the lack of diagnostic accuracy do not presently support clinical use, characterization of the adrenal response to an ACTH stimulus improves the understanding of EGGD pathophysiology and its relation to stress.
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Affiliation(s)
- Fay J Sauer
- Department of Clinical Veterinary Medicine, Swiss Institute for Equine Medicine (ISME), Vetsuisse Faculty, University of Bern, and Agroscope, Bern, Switzerland
| | - Rupert M Bruckmaier
- Veterinary Physiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Alessandra Ramseyer
- Department of Clinical Veterinary Medicine, Swiss Institute for Equine Medicine (ISME), Vetsuisse Faculty, University of Bern, and Agroscope, Bern, Switzerland
| | - Beatriz Vidondo
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Milena D Scheidegger
- Department of Clinical Veterinary Medicine, Swiss Institute for Equine Medicine (ISME), Vetsuisse Faculty, University of Bern, and Agroscope, Bern, Switzerland
| | - Vinzenz Gerber
- Department of Clinical Veterinary Medicine, Swiss Institute for Equine Medicine (ISME), Vetsuisse Faculty, University of Bern, and Agroscope, Bern, Switzerland
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Bass L, Swain E, Santos H, Hess T, Black J. Effects of Feeding Frequency Using a Commercial Automated Feeding Device on Gastric Ulceration in Exercised Quarter Horses. J Equine Vet Sci 2018; 64:96-100. [DOI: 10.1016/j.jevs.2018.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 01/24/2018] [Accepted: 02/03/2018] [Indexed: 10/18/2022]
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Huxford KE, Dart AJ, Perkins NR, Bell R, Jeffcott LB. A pilot study comparing the effect of orally administered esomeprazole and omeprazole on gastric fluid pH in horses. N Z Vet J 2017; 65:318-321. [PMID: 28738738 DOI: 10.1080/00480169.2017.1359125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AIMS To compare the efficacy of an enteric coated esomeprazole paste with an enteric coated omeprazole paste to increase gastric pH after oral administration in horses. METHODS Nine adult Standardbred horses were randomly assigned to three groups, each containing three horses, for a study comprising three phases of 10 days, with an 18-day washout period between each phase. In each phase, three horses received either 0.5 mg/kg esomeprazole, 1 mg/kg omeprazole or a placebo, as an oral paste, once daily for 10 days (Days 0-9). Over the course of study all horses received all three treatments. Gastric fluid samples were collected using a gastroscope on Days 1, 3, 5, 8 and 10, with food and water withheld for 16 hours prior to collection of samples. The pH of all samples was measured immediately after collection. RESULTS Mean pH (3.38; SD 1.75) of the gastric fluid samples in the horses that received the placebo was lower than in the horses that received esomeprazole (6.28; SD 1.75) or omeprazole (6.13; SD 1.75) (p<0.001). There was no difference in the mean pH between horses receiving esomeprazole and those receiving omeprazole (p=0.56). CONCLUSIONS AND CLINICAL RELEVANCE Under these study conditions, esomeprazole paste was equally as effective as omeprazole paste in increasing gastric pH in horses. Enteric coated esomeprazole, may be a therapeutic alternative to omeprazole for the prevention of gastric ulcers in horses.
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Affiliation(s)
- K E Huxford
- a University Veterinary Teaching Hospital Camden , University of Sydney , Camden , NSW 2567 , Australia
| | - A J Dart
- a University Veterinary Teaching Hospital Camden , University of Sydney , Camden , NSW 2567 , Australia
| | - N R Perkins
- b School of Veterinary Science , University of Queensland , Gatton , QLD 4343 , Australia
| | - R Bell
- a University Veterinary Teaching Hospital Camden , University of Sydney , Camden , NSW 2567 , Australia
| | - L B Jeffcott
- a University Veterinary Teaching Hospital Camden , University of Sydney , Camden , NSW 2567 , Australia
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The Effect of Serum-Based Bioactive Proteins for the Prevention of Squamous Gastric Ulcers in Horses. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2016.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hund A, Beer T, Wittek T. Abomasal ulcers in slaughtered cattle in Austria. Tierarztl Prax Ausg G Grosstiere Nutztiere 2016; 44:279-285. [PMID: 27272498 DOI: 10.15653/tpg-150800] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 03/18/2016] [Indexed: 01/15/2023]
Abstract
OBJECTIVE In this preliminary study, the prevalence of abomasal ulcers in cattle in Austria was evaluated for the first time. Furthermore, possible management factors contributing to the formation of abomasal ulcers and the diagnostic ability of faecal occult blood tests were evaluated. MATERIAL AND METHODS Abomasa of 91 calves, 33 cows and 91 bulls were examined for abomasal ulcers after slaughter. The ulcers were recorded, abomasal content pH was measured and faeces were examined for occult blood. The carcass classification was recorded and the owners were presented with a voluntary questionnaire targeted at health-, management- and feeding-practices that could influence gastric health. RESULTS The median abomasal pH was 3.0 in calves, 3.6 in bulls and 3.9 in cows. More than 50% of all animals had abomasal ulcers, all of which belonged to the slightest kind of lesion. Faecal occult blood tests proved not to be suitable for detecting these ulcers. From the questionnaire no clear tendencies as far as causative factors for abomasal ulcers could be determined. CONCLUSION AND CLINICAL RELEVANCE It can be assumed that cattle management systems in Austria contribute to the formation of low-grade abomasal ulcers. Due to the lack of a suitable in vivo model to research the formation of abomasal ulcers in cattle all further speculations must remain elusive. Further influencing factors, such as bacterial ulcer colonization, and the true economic and animal welfare impact of these findings need further investigation. The results of this study should be corroborated in a larger, prospective trial.
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Affiliation(s)
- Alexandra Hund
- Alexandra Hund, Universitätsklinik für Wiederkäuer, Veterinärmedizinische Universität Wien, Veterinärplatz 1, 1210 Wien, Österreich, E-Mail:
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Affiliation(s)
- F. M. Andrews
- Equine Health Studies Program; Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - C. Larson
- Zinpro Corporation; Eden Prairie Minnesota USA
| | - P. Harris
- WALTHAM Centre for Pet Nutrition; Waltham-on-the-Wolds; Leicestershire UK
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Andrews FM, Camacho-Luna P, Loftin PG, Gaymon G, Garza F, Keowen ML, Kearney MT. Effect of a pelleted supplement fed during and after omeprazole treatment on nonglandular gastric ulcer scores and gastric juice pH in horses. EQUINE VET EDUC 2015. [DOI: 10.1111/eve.12384] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. M. Andrews
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - P. Camacho-Luna
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - P. G. Loftin
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - G. Gaymon
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - F. Garza
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - M. L. Keowen
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
| | - M. T. Kearney
- Department of Pathobiological Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge USA
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Sanz MG, Viljoen A, Saulez MN, Olorunju S, Andrews FM. Efficacy of a pectin-lecithin complex for treatment and prevention of gastric ulcers in horses. Vet Rec 2014; 175:147. [DOI: 10.1136/vr.102359] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M. G. Sanz
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
- Department of Veterinary Science; Maxwell H. Gluck Equine Research Center; University of Kentucky; Lexington KY 40546 USA
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
| | - M. N. Saulez
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
- Drakenstein Veterinary Clinic; Western Cape 7599 South Africa
| | - S. Olorunju
- The Biostatistics Unit; Medical Research Council of South Africa; Pretoria 0001 South Africa
| | - F. M. Andrews
- The Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Louisiana 70803 USA
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Birkmann K, Junge HK, Maischberger E, Wehrli Eser M, Schwarzwald CC. Efficacy of omeprazole powder paste or enteric-coated formulation in healing of gastric ulcers in horses. J Vet Intern Med 2014; 28:925-33. [PMID: 24628650 PMCID: PMC4895457 DOI: 10.1111/jvim.12341] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 12/22/2013] [Accepted: 01/30/2014] [Indexed: 11/29/2022] Open
Abstract
Background GastroGard, an omeprazole powder paste formulation, is considered the standard treatment for gastric ulcers in horses and is highly effective. Gastrozol, an enteric‐coated omeprazole formulation for horses, has recently become available, but efficacy data are controversial and sparse. Objectives To investigate the efficacy of GastroGard and Gastrozol at labeled doses (4 and 1 mg of omeprazole per kg bwt, respectively, PO q24h) in healing of gastric ulcers. Animals 40 horses; 9.5 ± 4.6 years; 491 ± 135 kg. Methods Prospective, randomized, blinded study. Horses with an ulcer score ≥1 (Equine Gastric Ulcer Council) were randomly divided into 2 groups and treated for 2 weeks each with GastroGard followed by Gastrozol (A) or vice versa (B). After 2 and 4 weeks, scoring was repeated and compared with baseline. Plasma omeprazole concentrations were measured on the first day of treatment after administration of GastroGard (n = 5) or Gastrozol (n = 5). Results Compared with baseline (squamous score (A) 1.65 ± 0.11, (B) 1.98 ± 0.11), ulcer scores at 2 weeks ((A) 0.89 ± 0.11, (B) 1.01 ± 0.11) and 4 weeks ((A) 1.10 ± 0.12, (B) 0.80 ± 0.12) had significantly decreased in both groups (P < .001), independent of treatment (P = .7). Plasma omeprazole concentrations were significantly higher after GastroGard compared with Gastrozol administration (AUCGG = 2856 (1405‐4576) ng/mL × h, AUCGZ = 604 (430‐1609) ng/mL × h; P = .03). The bioavailability for Gastrozol was 1.26 (95% CI 0.56–2.81) times higher than for GastroGard. Conclusions and Clinical Importance Both Gastrozol and GastroGard, combined with appropriate environmental changes, promote healing of gastric ulcers in horses. However, despite enteric coating of Gastrozol, plasma omeprazole concentrations after single labeled doses were significantly higher with GastroGard.
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Affiliation(s)
- K Birkmann
- Equine Department, Vetsuisse Faculty, Clinic for Equine Internal Medicine, University of Zurich, Zurich, Switzerland
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Hellings IR, Larsen S. ImproWin® in the treatment of gastric ulceration of the squamous mucosa in trotting racehorses. Acta Vet Scand 2014; 56:13. [PMID: 24625291 PMCID: PMC4008370 DOI: 10.1186/1751-0147-56-13] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 02/23/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Gastric ulceration is highly prevalent in horses, and there is a large commercial market for feed-additives and non-licenced products that claim effect for prevention and treatment of gastric ulceration. ImproWin® has been used as a feed additive in horses with anecdotal evidence that it may have some positive effects on gastric ulceration.The aim of this study was to investigate the effect of ImproWin® treatment on spontaneously occurring gastric ulcers of the squamous mucosa in Standardbred and Coldblooded trotting racehorses. The study was performed as a randomised, double-blinded, single centre study with stratified semi cross-over design with breed as stratification factors. The horses were clinically and endoscopically examined prior to start and after three weeks of treatment. The ulcerations were scored in accordance with Equine Gastric Ulcer Council (EGUC) recommendations on a 5 point scale and on a 10 cm Visual Analogue Scale (VAS). The patients were responder-classified after 3 weeks. Responders in need of ulcer treatment were randomly allocated to 2 or 4 weeks of additional treatment. Non-responders to placebo were crossed to ImproWin®. RESULTS The 5-point EGUC score and VAS recorded score was significantly reduced (P ≤ 0.01) in both groups after 3 weeks of treatment. From 3 weeks to the end of treatment the score was further significantly reduced in the ImproWin® group (P ≤ 0.05). At the end of treatment, 78% in the ImproWin® group and 54.8% in the placebo group were classified as responders. The difference was significant (P = 0.04). CONCLUSIONS ImproWin® may aid the healing process of ulcers of the gastric squamous mucosa of trotters.
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Moore-Colyer M, O'Gorman DM, Wakefield K. An In Vitro Investigation into the Effects of a Marine-Derived, Multimineral Supplement in Simulated Equine Stomach and Hindgut Environments. J Equine Vet Sci 2014. [DOI: 10.1016/j.jevs.2013.07.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Aristizabal F, Nieto J, Yamout S, Snyder J. The effect of a hay grid feeder on feed consumption and measurement of the gastric pH using an intragastric electrode device in horses: A preliminary report. Equine Vet J 2013; 46:484-7. [DOI: 10.1111/evj.12175] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. Aristizabal
- The William R. Pritchard Veterinary Medical Teaching Hospital; University of California; Davis USA
| | - J. Nieto
- Comparative Gastrointestinal Laboratory; Department of Veterinary Surgical and Radiological Sciences; University of California; Davis USA
| | - S. Yamout
- The William R. Pritchard Veterinary Medical Teaching Hospital; University of California; Davis USA
| | - J. Snyder
- Comparative Gastrointestinal Laboratory; Department of Veterinary Surgical and Radiological Sciences; University of California; Davis USA
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Huff N, Auer A, Garza F, Keowen M, Kearney M, McMullin R, Andrews F. Effect of Sea Buckthorn Berries and Pulp in a Liquid Emulsion on Gastric Ulcer Scores and Gastric Juice pH in Horses. J Vet Intern Med 2012; 26:1186-91. [DOI: 10.1111/j.1939-1676.2012.00975.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Revised: 04/28/2012] [Accepted: 06/15/2012] [Indexed: 11/30/2022] Open
Affiliation(s)
- N.K. Huff
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Equine Health Studies Program; Louisiana State University; Baton Rouge; LA
| | - A.D. Auer
- Purdue University School of Veterinary Medicine; West Lafayette; IN
| | - F. Garza
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Equine Health Studies Program; Louisiana State University; Baton Rouge; LA
| | - M.L. Keowen
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Equine Health Studies Program; Louisiana State University; Baton Rouge; LA
| | - M.T. Kearney
- Department of Pathobiological Sciences; School of Veterinary Medicine; Louisiana State University; Baton Rouge; LA
| | | | - F.M. Andrews
- Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Equine Health Studies Program; Louisiana State University; Baton Rouge; LA
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Videla R, Sommardahl C, Elliott S, Vasili A, Andrews F. Effects of Intravenously Administered Esomeprazole Sodium on Gastric Juice pH in Adult Female Horses. J Vet Intern Med 2011; 25:558-62. [DOI: 10.1111/j.1939-1676.2011.0716.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Rodrigues NLF, Doré M, Doucet MY. Expression of cyclooxygenase isoforms in ulcerated tissues of the nonglandular portion of the stomach in horses. Am J Vet Res 2010; 71:592-6. [PMID: 20433387 DOI: 10.2460/ajvr.71.5.592] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE To characterize the expression of the cyclooxygenase (COX)-1 and COX-2 isoforms in naturally occurring ulcers of the nonglandular portion of the stomach in horses. SPECIMEN POPULATION: 38 specimens from ulcerated stomachs and 10 specimens from healthy stomachs. PROCEDURES Specimens were collected at an abbatoir; for each specimen of squamous gastric mucosa, 1 portion was fixed in neutral-buffered 10% formalin for immunohistochemical analysis and another was frozen at -70 degrees C for immunoblotting analysis. Immunoreactivity to 2 antibodies, MF241 (selective for COX-1) and MF243 (selective for COX-2), was evaluated by a veterinary pathologist using a scoring system. Expression of COX-1 and COX-2 was confirmed by use of immunoblotting analyses. RESULTS All specimens from healthy stomachs strongly expressed COX-1, whereas only 2 of 10 expressed COX-2. The expression of both isoforms varied greatly in the ulcerated mucosal specimens. Expression of COX-1 was significantly lower and expression of COX-2 was significantly higher in ulcerated versus healthy specimens. CONCLUSIONS AND CLINICAL RELEVANCE Increased expression of COX-2 in gastric ulcers of the squamous portion of the stomach in horses suggested a role for this enzyme in gastric ulcer healing.
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Affiliation(s)
- Natália L F Rodrigues
- Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC J2S 7C6, Canada
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Effect of paddock vs. stall housing on 24 hour gastric pH within the proximal and ventral equine stomach. Equine Vet J 2010; 40:337-41. [DOI: 10.2746/042516408x284673] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
REASONS FOR PERFORMING STUDY There is little information about the prevalence of gastric ulcers in Standardbred trotters and potential correlations between ulcers and various traits, e.g. age, sex, performance, temperament and feeding regimens, need further elucidation. OBJECTIVES The prevalence of ulcers in the gastric squamous mucosa of Swedish Standardbreds was estimated and the associations between ulcer score and age, sex, performance, temperament and feeding regimens were determined. METHODS Eighty Swedish Standardbreds in active race training, trained by 9 different trainers, underwent gastroscopy. Information on age, gender, status of training, performance over the last 4 months compared with the trainer's expectations before that period, behaviour, eating habits, feed type, bedding type, time spent outdoors per day and medical treatment during the last month was collected. Gastroscopy was performed and lesions in the squamous gastric mucosa were scored from 0 to 4 (0 = no lesions; 4 = > 5 lesions with haemorrhage, > 10 lesions with no haemorrhage, or a large area of diffuse loss of surface epithelium). RESULTS Twenty-four (30%) of the horses had no lesions in the squamous mucosa, 22 (27.5%) had a score of 1; 21 (26.2%) score 2; 9 (11.2%) score 3; and 4 (5%) score 4. Horses that were in preparatory training and those that had raced during the last month were significantly more affected than horses that were fit for racing but had not raced during the last month, using a logistic regression model with trainer incorporated as a random effect. CONCLUSIONS The study confirmed a high prevalence of ulcers in the gastric squamous mucosa of Standardbreds in race training. Of the studied parameters only status of training showed a significant association with gastric ulcers of the squamous mucosa. POTENTIAL RELEVANCE Gastric ulceration is a common disease and diagnosis should be made by endoscopic examination of the gastric mucosa, since parameters such as age, gender, performance, behaviour, eating habits provide only weak clues as to which horses might be affected. Further studies are needed to determine the aetiology of the syndrome and to find ways to reduce, if possible, the frequency of gastric ulcers.
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Affiliation(s)
- H Jonsson
- ATG:s Hästsjukhus Färjestad, Norra Infarten 82, SE-654 65 Karlstad, Sweden
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Murray MJ, Hepburn RJ, Sullins KE. Preliminary study of use of a polypectomy snare to obtain large samples of the equine gastric antrum by endoscopy. Equine Vet J 2010; 36:76-8. [PMID: 14756376 DOI: 10.2746/0425164044864606] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- M J Murray
- Marion duPont Scott Equine Medical Center, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Leesburg, Virginia 20177, USA
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Rodrigues NLF, Doré M, Doucet MY. Validation of a transendoscopic glandular and nonglandular gastric biopsy technique in horses. Equine Vet J 2009; 41:631-5. [PMID: 19927580 DOI: 10.2746/042516409x424144] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
REASONS FOR PERFORMING STUDY In order to study the evolution of histopathological and immunohistochemical changes in the gastric mucosa of horses with EGUS (equine gastric ulcer syndrome), a feasible, useful, valid and safe in vivo gastric biopsy technique is required. OBJECTIVES To determine the average gastric mucosal healing time following endoscopic gastric biopsy sampling, and evaluate the feasibility, safety and usefulness of samples obtained by this method for histopathological analysis. METHODS Six mature mares from the Faculté de Médecine Vétérinaire research herd were used. Transendoscopic gastric biopsy was performed on Days 0 and 9 using a flexible forceps with oval and fenestrated jaws to obtain gastric mucosal samples from 4 different sites: cardia (C), fundus (F), margo plicatus (MP) and glandular mucosa (GL). A maximum of 4 samples per site was taken and processed routinely for histopathology, evaluated by a pathologist. On Days 1-4 and 9-11 the lesions created by the biopsies were evaluated by gastroscopy. Lesions were evaluated over time based on a score from 0-4, where 4 was the most severe. RESULTS Biopsy samples could be obtained from all targeted sites except C. No abnormal clinical signs were observed up to 7 days post biopsy. The average biopsy lesion scores decreased significantly with time for all sites. The average lesion score was significantly higher for the MP compared to the other sites at Days 1 and 2. Samples taken from the nonglandular portion of the stomach were considered inadequate for histopathology, while those taken from the glandular mucosa were adequate. CONCLUSION The transendoscopic gastric biopsy technique described here is a feasible, safe and useful technique for obtaining samples from the equine gastric glandular mucosa. Although biopsy samples could be obtained from several areas in the nonglandular mucosa, these were very small, took longer to heal and were not considered adequate for histopathological evaluation, and another technique should therefore be validated.
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Affiliation(s)
- N L F Rodrigues
- Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
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de Bruijn CM, Schutrups AH, Seesing EHAL. Prevalence of equine gastric ulceration syndrome in standardbreds. Vet Rec 2009; 164:814-5. [PMID: 19561352 DOI: 10.1136/vr.164.26.814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- C M de Bruijn
- Wolvega Equine Hospital, Stellingenweg, Oldeholtpade, The Netherlands
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Videla R, Andrews FM. New Perspectives in Equine Gastric Ulcer Syndrome. Vet Clin North Am Equine Pract 2009; 25:283-301. [DOI: 10.1016/j.cveq.2009.04.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Rabuffo TS, Hackett ES, Grenager N, Boston R, Orsini JA. Prevalence of Gastric Ulcerations in Horses with Colic. J Equine Vet Sci 2009. [DOI: 10.1016/j.jevs.2009.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Nieto JE, Snyder JR, Vatistas NJ, Jones JH. Effect of gastric ulceration on physiologic responses to exercise in horses. Am J Vet Res 2009; 70:787-95. [DOI: 10.2460/ajvr.70.6.787] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Reese RE, Andrews FM. Nutrition and Dietary Management of Equine Gastric Ulcer Syndrome. Vet Clin North Am Equine Pract 2009; 25:79-92, vi-vii. [DOI: 10.1016/j.cveq.2008.11.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Morrissey NK, Bellenger CR, Baird AW. Bradykinin stimulates prostaglandin E2 production and cyclooxygenase activity in equine nonglandular and glandular gastric mucosa in vitro. Equine Vet J 2008; 40:332-6. [PMID: 18331972 DOI: 10.2746/042516408x293556] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
REASONS FOR PERFORMING STUDY There are few data available regarding regulation of prostaglandin (PG) generation by equine gastric mucosae and the role of the cyclooxygenase (COX) isoforms in their production. OBJECTIVES To: 1) characterise and quantify PGE2 output in vitro; 2) examine the sensitivity of PGE2 production to exogenous bradykinin (BK) exposure; 3) determine the contribution of the COX-1 and COX-2 pathways to basal and BK-stimulated PGE2 production; and 4) measure if BK influences electrogenic ion transport in equine gastric mucosae in vitro. METHODS Full thickness gastric sheets were obtained from horses at post mortem, stripped of muscle layers and mounted in Ussing chambers. Tissues were exposed to bradykinin (BK, 0.1 micromol/l) either alone, or following pretreatment with a selective COX-2 inhibitor (NS-398, 1 micromol/l) or a nonselective COX inhibitor (piroxicam, 1 micromol/l), or were untreated. RESULTS BK administration increased PGE2 output from the basolateral but not the apical faces of both tissue types. Piroxicam, but not NS-398, reduced basolateral PGE2 release below control levels in both tissue types. Both piroxicam and NS-398 pretreatment inhibited BK-stimulated PGE2 release. In separate experiments, BK was without effect upon electrophysiological parameters of tissues mounted in Ussing chambers. CONCLUSIONS PGE2 is produced by the nonglandular and glandular equine gastric mucosae in vitro. Significantly more PGE2 is released basolaterally than apically. BK stimulated the production of PGE2 from the basolateral side of both tissue types. These findings suggest that COX-1 is a significant pathway for basal PGE2 production from the basolateral faces of both nonglandular and glandular equine gastric mucosae in vitro.
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Abstract
In recent years, gastric ulceration has been recognised as a common, possibly performance-limiting disease of adult horses. Here, we aim to provide the reader with a useful review of recent literature covering all aspects of equine gastric ulcer syndrome (EGUS) in adult horses. The anatomy and physiology of the stomach, with particular reference to secretion of acid and mucosal protective mechanisms, are reviewed, as are the differing theories relating to the aetiopathogenesis of gastric ulceration. We also explore the possible influence of various management factors on development of the disease. The prevalence of the disease in racehorses has been reported to be as high as 100%. In general, horses that are in active training for racing tend to have a prevalence of around 90%, whereas pleasure horses in full work have a reported prevalence of approximately 60%. Emerging diagnostic tests which could obviate the need for gastroscopy are introduced and current recommendations for treatment are summarised, focussing on proton pump inhibitors, in particular omeprazole, administered orally. The oral administration of omeprazole has been shown to be effective in both treating horses with gastric ulceration and at preventing re-occurrence whilst the horses are in training, provided that daily dosing is maintained.
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Affiliation(s)
- R J W Bell
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand.
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Andrews FM, Buchanan BR, Smith SH, Elliott SB, Saxton AM. In vitro effects of hydrochloric acid and various concentrations of acetic, propionic, butyric, or valeric acids on bioelectric properties of equine gastric squamous mucosa. Am J Vet Res 2007; 67:1873-82. [PMID: 17078749 DOI: 10.2460/ajvr.67.11.1873] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To compare the effects of hydrochloric acid (HCl) and various concentrations of volatile fatty acids (VFAs) on tissue bioelectric properties of equine stomach nonglandular (NG) mucosa. SAMPLE POPULATION Gastric tissues obtained from 48 adult horses. PROCEDURES NG gastric mucosa was studied by use of Ussing chambers. Short-circuit current (Isc) and potential difference (PD) were measured and electrical resistance (R) and conductance calculated for tissues after addition of HCl and VFAs (5, 10, 20, and 40 mM) in normal Ringer's solution (NRS). RESULTS Mucosa exposed to HCl in NRS (pH of 1.5 and, to a lesser extent, 4.0) had a significant decrease in Isc, PD, and R, whereas tissues exposed to acetic acid at a pH of < 4.0, propionic and butyric acids at a pH of <or= 4.0, and valeric acid at a pH of <or= 7.0 induced a concentration-dependent effect on reduction in these same values. Values for Isc returned to baseline (recovery of sodium transport) after addition of calcium carbonate in tissues exposed to all concentrations of VFAs except the higher concentrations of valeric acid at a pH of <or= 4.0. Histologic examination revealed cell swelling in the mucosal layers below and adjacent to the stratum corneum in tissues exposed to HCl and VFAs at a pH of <or= 4.0. CONCLUSIONS AND CLINICAL RELEVANCE The VFAs, especially acetic acid, in the presence of HCl at a pH of <or= 4.0 appear to be important in the pathogenesis of NG mucosal ulcers in horses.
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Affiliation(s)
- Frank M Andrews
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA
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Abstract
Colic remains a significant problem in the horse in terms of welfare and economics; in some equine populations it is the single most common cause of death. Many causes of colic are cited in the equestrian and veterinary literature but little scientific evidence exists to substantiate these theories. Recent epidemiological investigations have confirmed that colic is complex and multi-factorial in nature. Studies have identified a number of factors that are associated with increased risk of colic including parasite burden, certain feed types, recent change in feeding practices, stabling, lack of access to pasture and water, increasing exercise and transport. These findings are reviewed together with examples of management practices that may be altered to reduce the incidence of specific types of colic. This is an opinionated, not a systematic, review focusing on those areas that are considered most relevant to the practitioner.
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Affiliation(s)
- D C Archer
- Faculty of Veterinary Science, University of Liverpool, Leahurst, Neston, The Wirral CH64 7TE, UK.
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Chameroy KA, Nadeau JA, Bushmich SL, Dinger JE, Hoagland TA, Saxton AM. Prevalence of non-glandular gastric ulcers in horses involved in a university riding program. J Equine Vet Sci 2006. [DOI: 10.1016/j.jevs.2006.03.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fink C, Hembes T, Brehm R, Weigel R, Heeb C, Pfarrer C, Bergmann M, Kressin M. Specific localisation of gap junction protein connexin 32 in the gastric mucosa of horses. Histochem Cell Biol 2006; 125:307-13. [PMID: 16205941 DOI: 10.1007/s00418-005-0047-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/14/2005] [Indexed: 11/30/2022]
Abstract
In the glandular stomach, gap junctional intercellular communication (GJIC) plays an important role in the gastric mucosal defense system, and loss of GJIC is associated with ulcer formation. In spite of the high incidence of gastric ulcers in horses, particularly at pars nonglandularis, the presence of gap junctions in the equine stomach has not yet been studied. The objective was to obtain basic data on the distribution of gap junction protein connexin 32 (Cx32) in the different regions of normal equine gastric mucosa. Samples of mucosa were taken from seven horses at cardiac, fundic, and pyloric region and pars nonglandularis. To detect Cx32, immunohistochemical staining and Western blot analysis were performed. Corresponding mRNA was shown by RT-PCR and localised in tissue sections by in situ hybridisation. Cx32 was found in the glandular regions, whereas it was not detectable in squamous mucosa. Within the glandular epithelium, Cx32 was abundant in surface and foveolar cells and decreased towards the proliferative zone of the glands. These results suggest that gap junctions develop during the maturation of surface cells. Whether the lack of Cx32 at pars nonglandularis contributes to its susceptibility for developing ulcers, has to be further elucidated.
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Affiliation(s)
- Cornelia Fink
- Department of Veterinary Anatomy, Histology and Embryology, Justus-Liebig-University Giessen, Frankfurter Strasse 98, Giessen, Germany.
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Roy MA, Vrins A, Beauchamp G, Doucet MY. Prevalence of Ulcers of the Squamous Gastric Mucosa in Standardbred Horses. J Vet Intern Med 2005. [DOI: 10.1111/j.1939-1676.2005.tb02755.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Buchanan BR, Andrews FM. Treatment and prevention of equine gastric ulcer syndrome. Vet Clin North Am Equine Pract 2004; 19:575-97. [PMID: 14740758 DOI: 10.1016/j.cveq.2003.08.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
EGUS is a common problem in horses and foals. Acids are the important causative factors and current therapy targets the suppression of gastric HCl and creation of a permissive environment for ulcer healing. Diagnosis is based on history, clinical signs, gastroscopy, and response to treatment. Of the products available, only GastroGard (FDA approved) and ranitidine have been shown to be efficacious in the treatment of EGUS. Ranitidine is often associated with treatment failure as a result of incorrect dosing and lack of owner compliance, because of the three times daily dosing required. Also, EGUS occurs in critically ill neonatal foals, but the pathogenesis may be different than in adult horses and acid-suppressive therapy may not be as effective.
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Affiliation(s)
- Benjamin R Buchanan
- Department of Large Animal Clinical Sciences, The University of Tennessee College of Veterinary Medicine, Knoxville 37996, USA.
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O'Conner MS, Steiner JM, Roussel AJ, Williams DA, Meddings JB, Pipers F, Cohen ND. Evaluation of urine sucrose concentration for detection of gastric ulcers in horses. Am J Vet Res 2004; 65:31-9. [PMID: 14719699 DOI: 10.2460/ajvr.2004.65.31] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the use of sucrose permeability testing to detect ulcers in the gastric squamous mucosa of horses. ANIMALS 13 adult horses ranging from 5 to 19 years of age. PROCEDURE Following induction of gastric ulcers by intermittent feed deprivation, horses underwent sucrose permeability testing (administration of sucrose by nasogastric intubation followed by collection of urine at 2 and 4 hours after intubation) and gastric endoscopy. Squamous ulcers were assigned a severity score (range, 0 to 3) by use of an established scoring system. Horses were subsequently administered omeprazole for 21 days, and sucrose testing and endoscopy were repeated. Pair-wise comparisons of urine sucrose concentration were made between horses with induced ulcers before and after omeprazole treatment. Urine sucrose concentrations also were compared on the basis of ulcer severity score. RESULTS Urine sucrose concentrations and ulcer severity scores were significantly higher in horses with induced ulcers before omeprazole treatment than after treatment. Urine sucrose concentrations were significantly higher for horses with ulcer severity scores > 1. Use of a cut-point value of 0.7 mg/mL revealed that the apparent sensitivity and specificity of sucrose permeability testing to detect ulcers with severity scores > 1 was 83% and 90%, respectively. Results were similar after adjusting sucrose concentrations for urine osmolality. CONCLUSIONS AND CLINICAL RELEVANCE Urine sucrose concentration appears to be a reliable but imperfect indicator of gastric squamous ulcers in horses. Sucrose permeability testing may provide a simple, noninvasive test to detect and monitor gastric ulcers in horses.
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Affiliation(s)
- Michael S O'Conner
- Department of Large Animal Medicine and Surgery, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843, USA
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