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Laclaire AL, Manguin E, Tanquerel L. Lower airway ultrasonographic, endoscopic, and cytological changes in horses undergoing inhalation anesthesia with controlled ventilation for minor elective surgeries. J Equine Vet Sci 2024; 132:104986. [PMID: 38135197 DOI: 10.1016/j.jevs.2023.104986] [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: 09/22/2023] [Revised: 11/02/2023] [Accepted: 12/19/2023] [Indexed: 12/24/2023]
Abstract
Effects of general anesthesia with controlled ventilation on the respiratory system have had limited evaluation in horses. A prospective observational study was performed with eleven client-owned horses undergoing elective surgery. Physical examination, auscultation with a rebreathing bag, complete blood cell count, lung ultrasound imaging, tracheal endoscopy imaging and transendoscopic tracheal wash were conducted before and 24 hours after anesthesia. Lung ultrasound imaging was also repeated just after recovery. A significant increase in blood neutrophil count between pre- and post-anesthesia (P=0.004) was observed. There was an increase in ultrasonographic score of the lungs at recovery (left P=0.007, right P=0.017). The score of the dependent lung was higher than the independent lung at recovery time (P=0.026) but no difference was observed 24 hours after anesthesia. The tracheal mucus score was higher after anesthesia (P=0.001); severe local inflammation was present in several horses at the site of endotracheal tube cuff. Neutrophil count was significantly higher on tracheal wash fluid cytology after anesthesia (P=0.016), without any significant changes on bacterial load. Increased tracheal mucus score and neutrophil count in tracheal wash samples were observed after general anesthesia in healthy horses without clinical evidence of pneumonia (fever, cough). Tracheal inflammation secondary to endotracheal intubation and cuff inflation was, therefore, suspected. Elective surgery without complications can induce inflammation of the trachea and changes in ultrasound images of the lungs in healthy horses and should be considered when evaluating respiratory system after a general anesthesia.
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Affiliation(s)
- Anne-Louise Laclaire
- National Veterinary School of Alfort, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France.
| | - Estelle Manguin
- National Veterinary School of Alfort, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France
| | - Ludovic Tanquerel
- National Veterinary School of Alfort, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France
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Morini M, Gobbo F, Rinnovati R, Romagnoli N, Peli A, Massarenti C, Spadari A, Pietra M. Bronchoalveolar Lavage Cytology in Severe Equine Asthma: Cytocentrifugated versus Sediment Smear Preparations. Vet Sci 2023; 10:527. [PMID: 37624314 PMCID: PMC10459724 DOI: 10.3390/vetsci10080527] [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: 06/15/2023] [Revised: 08/11/2023] [Accepted: 08/13/2023] [Indexed: 08/26/2023] Open
Abstract
Equine asthma is a common respiratory disease that may affect horses of any age. The diagnosis of severe equine asthma (SEA) (historically referred as recurrent airway obstruction or RAO) is based mainly on the history of the animal and clinical signs, which are further supported by the cytological examination of the bronchoalveolar lavage (BAL). This can also be helpful in monitoring the inflammation of the lower airways in response to environmental management and medication. The cytocentrifugated preparation is usually considered the method of choice for BAL cytological interpretation. The aim of this study was to compare the results in terms of differential cell counts (DCC) in BAL cytology performed on sedimented smears and cytocentrifugated preparations. To carry this out, 48 BAL samples were collected from six horses with SEA that were subjected to a process of exacerbation of the disease by environmental stimuli, which was later followed by the appropriate treatment. Each collected BAL fluid was equally divided into duplicate portions: one processed by cytocentrifugation and one by sediment smear from simple centrifugation. Cytologic examination of all BAL by both methods showed poor concordance in DCC, although it was still able to allow diagnostic recognition of severe lung neutrophilic disorders. These results suggest that sediment smear preparation, although remaining a useful method in general equine practice associated with clinical assessments in the diagnosis of SEA under conditions where there is no possibility of using a cytocentrifuge, cannot be considered a comparable alternative.
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Affiliation(s)
- Maria Morini
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (F.G.); (R.R.); (N.R.); (A.S.); (M.P.)
| | - Francesca Gobbo
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (F.G.); (R.R.); (N.R.); (A.S.); (M.P.)
| | - Riccardo Rinnovati
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (F.G.); (R.R.); (N.R.); (A.S.); (M.P.)
| | - Noemi Romagnoli
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (F.G.); (R.R.); (N.R.); (A.S.); (M.P.)
| | - Angelo Peli
- Department for Life Quality Studies, University of Bologna, Rimini Campus, 47921 Rimini, Italy;
| | - Chiara Massarenti
- Anicura Veterinary Institute of Novara, Granozzo con Monticello, 20060 Novara, Italy;
| | - Alessandro Spadari
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (F.G.); (R.R.); (N.R.); (A.S.); (M.P.)
| | - Marco Pietra
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (F.G.); (R.R.); (N.R.); (A.S.); (M.P.)
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Rutledge JJ, Paegelow J, Ritchey J, Singh A, Rizzi T, Murray C, Gilliam L, Crisman E, Williams NJ, Holbrook TC. Nebulized glycosylated caffeic acid phenylether ester attenuation of environmental particulate-induced airway inflammation in horses. Front Vet Sci 2022; 9:958567. [PMID: 36406065 PMCID: PMC9669659 DOI: 10.3389/fvets.2022.958567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022] Open
Abstract
The objective of this study was to determine the extent that nebulized glycosylated caffeic acid phenylether ester-4-O-alpha-D-glucopyranoside (G-CAPE) attenuates particulate-induced airway inflammation in healthy horses. Our hypothesis was that nebulization with G-CAPE would result in improved respiratory scores, higher arterial oxygen partial pressure, and less inflammatory airway infiltrates in horses with induced airway inflammation, compared with untreated controls. Five healthy adult horses were housed inside a climate controlled, closed barn on straw bedding and fed ad lib moldy grass hay for 16 days to induce airway inflammation. An experimental crossover study was performed in which animals were treated with 200 mg G-CAPE dissolved in 45 mL of 10% triethanolamine (G-CAPE group) or 45 mL of 10% triethanolamine (CONTROL group), and clinical respiratory scoring, arterial blood gases, and bronchoalveolar lavages (BALs) were collected at predetermined time points up to 24 h post nebulization. While the mean neutrophil percentage decreased in treated horses compared to controls (9.3 ± 2.0 and 16.9 ± 2.4, respectively) at 6 hours post treatment (t = 6 h), the difference did not achieve statistical significance (p = 0.1154). Blood gas analysis did not differ significantly between groups. There was a significant difference in the mean respiratory scores of G-CAPE-treated horses between baseline and at 1-h post treatment (from 3.2 ± 0.7 to 1.6 ± 0.7, p = 0.0013). This study demonstrates that a single nebulized dose of G-CAPE decreased clinical respiratory scores 1 h post administration and decreased BAL percentage of neutrophils 6 h post administration in horses with particulate induced airway inflammation. This compound shows promise as an anti-inflammatory and warrants further investigation.
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Affiliation(s)
- Jessica J. Rutledge
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Jillian Paegelow
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Jerry Ritchey
- Department of Veterinary Pathobiology, Oklahoma State University, Stillwater, OK, United States
| | - Anuradha Singh
- Department of Chemistry, Oklahoma State University, Stillwater, OK, United States
| | - Theresa Rizzi
- Department of Veterinary Pathobiology, Oklahoma State University, Stillwater, OK, United States
| | - Cynthia Murray
- Department of Mathematics and Statistics, University of Central Oklahoma, Edmond, OK, United States
| | - Lyndi Gilliam
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Evan Crisman
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Natasha J. Williams
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Todd C. Holbrook
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
- *Correspondence: Todd C. Holbrook
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Minuto J, Bedenice D, Ceresia M, Zaghloul I, Böhlke M, Mazan MR. Clinical effects and pharmacokinetics of nebulized lidocaine in healthy horses. Front Vet Sci 2022; 9:984108. [PMID: 36187809 PMCID: PMC9521615 DOI: 10.3389/fvets.2022.984108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Background Nebulized lidocaine appears promising as a novel corticosteroid-sparing therapeutic for equine asthma, but its safety and pharmacokinetic behavior have yet to be confirmed. Objective To describe the effect of nebulized lidocaine on upper airway sensitivity, lung mechanics, and lower respiratory cellular response of healthy horses, as well as delivery of lidocaine to lower airways, and its subsequent absorption, clearance, and duration of detectability. Animals Six healthy university- and client-owned horses with normal physical examination and serum amyloid A, and no history of respiratory disease within 6 months. Methods Prospective, descriptive study evaluating the immediate effects of 1 mg/kg 4% preservative-free lidocaine following nebulization with the Flexineb®. Prior to and following nebulization, horses were assessed using upper airway endoscopy, bronchoalveolar lavage, and pulmonary function testing with esophageal balloon/pneumotachography and histamine bronchoprovocation. Additionally, blood and urine were collected at predetermined times following single-dose intravenous and nebulized lidocaine administration for pharmacokinetic analysis. Results Upper airway sensitivity was unchanged following lidocaine nebulization, and no laryngospasm or excessive salivation was noted. Lidocaine nebulization (1 mg/kg) resulted in a mean epithelial lining fluid concentration of 9.63 ± 5.05 μg/mL, and a bioavailability of 29.7 ± 7.76%. Lidocaine concentrations were higher in epithelial lining fluid than in systemic circulation (Cmax 149.23 ± 78.74 μg/L, CELF:Cmaxplasma 64.4, range 26.5–136.8). Serum and urine lidocaine levels remained detectable for 24 and 48 h, respectively, following nebulization of a single dose. Baseline spirometry, lung resistance and dynamic compliance, remained normal following lidocaine nebulization, with resistance decreasing post-nebulization. Compared to the pre-nebulization group, two additional horses were hyperresponsive following lidocaine nebulization. There was a significant increase in mean airway responsiveness post-lidocaine nebulization, based on lung resistance, but not dynamic compliance. One horse had BAL cytology consistent with airway inflammation both before and after lidocaine treatment. Conclusions Nebulized lidocaine was not associated with adverse effects on upper airway sensitivity or BAL cytology. While baseline lung resistance was unchanged, increased airway reactivity to histamine bronchoprovocation in the absence of clinical signs was seen in some horses following nebulization. Further research is necessary to evaluate drug delivery, adverse events, and efficacy in asthmatic horses.
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Affiliation(s)
- Jillian Minuto
- Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, MA, United States
| | - Daniela Bedenice
- Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, MA, United States
| | - Michelle Ceresia
- Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, MA, United States
- Department of Pharmacy Practice, School of Pharmacy, MCPHS University, Boston, MA, United States
| | - Iman Zaghloul
- Department of Pharmaceutical Sciences, School of Pharmacy, MCPHS University, Boston, MA, United States
| | - Mark Böhlke
- Department of Pharmaceutical Sciences, School of Pharmacy, MCPHS University, Boston, MA, United States
| | - Melissa R. Mazan
- Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, MA, United States
- *Correspondence: Melissa R. Mazan
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Rossi H, Raekallio M, Määttä M, Tapio H, Hanifeh M, Junnila J, Rajamäki MM, Mykkänen A. Effects of general anaesthesia in dorsal recumbency with and without vatinoxan on bronchoalveolar lavage cytology of healthy horses. Vet J 2019; 251:105352. [PMID: 31492391 DOI: 10.1016/j.tvjl.2019.105352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 06/05/2019] [Accepted: 08/02/2019] [Indexed: 11/29/2022]
Abstract
Pneumonia is one of the potential complications of general anaesthesia in horses. Anaesthesia is known to increase neutrophils in bronchoalveolar lavage fluid (BALF) of horses after lateral recumbency, but studies after dorsal recumbency are lacking. Our primary aim was to determine when lung inflammation reaches its maximum and how rapidly BALF cytology returns to baseline after anaesthesia in dorsal recumbency. A secondary aim was to investigate the possible effect of vatinoxan, a novel drug, on the BALF cytology results. Six healthy experimental horses were enrolled in this observational crossover study. The horses were subject to repeated BALF and blood sampling for 7 days after general anaesthesia with two treatment protocols, and without anaesthesia (control). During the two treatments, the horses received either medetomidine-vatinoxan or medetomidine-placebo as premedication, and anaesthesia was induced with ketamine-midazolam and maintained with isoflurane for 1h in dorsal recumbency. The differences in BALF and blood variables between the two anaesthesia protocols and control were analysed with repeated measures analysis of variance models. In this study, anaesthesia in dorsal recumbency resulted in no clinically relevant changes in airway cytology that could be differentiated from the effect of repeated BALF sampling. No differences in BALF matrix metalloproteinase gelatinolytic activity could be detected between the two treatments or the control series. Marked increase in serum amyloid A was detected in some animals. Vatinoxan as premedication did not consistently affect lung cytology or blood inflammatory markers after anaesthesia.
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Affiliation(s)
- H Rossi
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland.
| | - M Raekallio
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland
| | - M Määttä
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland
| | - H Tapio
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland
| | - M Hanifeh
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland
| | - J Junnila
- Oy 4Pharma Ltd., Arkadiankatu 7, Helsinki, Finland
| | - M M Rajamäki
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland
| | - A Mykkänen
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Viikintie 49, Helsinki, Finland
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6
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Muscat KE, Padalino B, Hartley CA, Ficorilli N, Celi P, Knight P, Raidal S, Gilkerson JR, Muscatello G. Equine Transport and Changes in Equid Herpesvirus' Status. Front Vet Sci 2018; 5:224. [PMID: 30320126 PMCID: PMC6167981 DOI: 10.3389/fvets.2018.00224] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/29/2018] [Indexed: 12/15/2022] Open
Abstract
The risk of respiratory disease in the transported horse can increase as a consequence of immunosuppression and stress associated primarily with opportunistic bacterial proliferation and viral reactivation. This study examines the ecology of equid herpesviruses (EHV) in these horses, exploring reactivation and changes in infection and shedding associated with transport, and any potential contributions to transport-related respiratory disease. Twelve horses were subjected to an 8-h road-transport event. Antibodies to EHV-1 and EHV-4 were detected by ELISA in serum collected prior to, immediately after and 2 weeks post transport. Respiratory tract endoscopy and tracheal washes were collected prior to and 5 days after transportation. Nasal swabs collected prior to, immediately after, 1 and 5 days following transport were screened for EHV-1,-2,-4,-5 using qPCR. Six horses had persistent neutrophilic airway infiltrates post transportation, indicative of subclinical respiratory disease. No horses were qPCR positive for either of the alphaherpesviruses (i.e., EHV-1/-4) nor did any seroconvert to either virus. Four out of nine horses positive for either EHV-2 or EHV-5 on qPCR prior to transport developed neutrophilic airway inflammation. Five horses showed increasingly positive readings on qPCR (i.e., reduced Cq) for EHV-2 after transportation and seven out of eleven horses positive for EHV-2 after transport shared strains of high sequence similarity with other horses in the study. One EHV-2 virus detected in one horse after transport was genetically different which may be due to reactivation. The clinical significance of EHV-2 and EHV-5 remains in question. However these results indicate that transportation may lead to increased shedding, transmission and reactivation of EHV-2 and EHV-5 but not EHV-1/-4. Unlike previous work focusing on the role of alphaherpesviruses, this research suggests that investigation of the gammaherpesviruses (i.e., EHV-2/-5) in transport-related disease should not be dismissed, particularly given that these viruses can encode suppressive immunomodulators that may affect host health.
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Affiliation(s)
- Katharine E Muscat
- School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Barbara Padalino
- School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia.,Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, Hong Kong.,HKSAR- Department of Veterinary Medicine, University of Bari, Bari, Italy
| | - Carol A Hartley
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, Australia
| | - Nino Ficorilli
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, Australia
| | - Pietro Celi
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, Australia.,DSM, Parsippany, NJ, United States
| | - Peter Knight
- Discipline of Biomedical Science, School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
| | - Sharanne Raidal
- School of Animal and Veterinary Sciences, Charles Stuart University, Wagga Wagga, NSW, Australia
| | - James R Gilkerson
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, Australia
| | - Gary Muscatello
- School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
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Echeverria KO, Lascola KM, Giguère S, Foreman JH, Austin SA. Pulmonary disposition and pharmacokinetics of minocycline in adult horses. Am J Vet Res 2017; 78:1319-1328. [DOI: 10.2460/ajvr.78.11.1319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Allano M, Labrecque O, Rodriguez Batista E, Beauchamp G, Bédard C, Lavoie JP, Leclere M. Influence of short distance transportation on tracheal bacterial content and lower airway cytology in horses. Vet J 2016; 214:47-9. [PMID: 27387726 DOI: 10.1016/j.tvjl.2016.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 12/04/2015] [Accepted: 02/15/2016] [Indexed: 10/22/2022]
Abstract
The aim of this study was to determine the effects of short distance transportation on airway mucus, cytology and bacterial culture to identify potential biases in the diagnosis of airway diseases in referral centres. Eight healthy adult horses were studied using a prospective cross-over design. Mucus scores, tracheal wash (cytology, bacterial culture) and bronchoalveolar lavage fluid (BALF; cytology) were obtained while stabled and following 2.5 h transportation (with and without hay). Neutrophil counts, percentages and BALF neutrophilia frequency increased following transport without hay (P <0.05). No effect was observed on tracheal cytology and bacterial count (P > 0.05). BALF neutrophilia could develop solely as a result of transportation or due to interactions between repeated transports, ambient temperature, head position or other environmental factors.
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Affiliation(s)
- Marion Allano
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada
| | - Olivia Labrecque
- Laboratoire d'épidemiosurveillance animale du Québec, Saint-Hyacinthe, Québec J2S 7C6, Canada
| | | | - Guy Beauchamp
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada
| | - Christian Bédard
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada
| | - Jean-Pierre Lavoie
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada
| | - Mathilde Leclere
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, Québec J2S 7C6, Canada.
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Sullivan SL, Cudmore LA, Bacci BB, Tennent-Brown BS. Atypical histopathological findings in a 15-year-old Warmblood gelding diagnosed with anhidrosis in a temperate climate. EQUINE VET EDUC 2015. [DOI: 10.1111/eve.12208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - L. A. Cudmore
- University of Melbourne; Werribee Victoria Australia
| | - B. B. Bacci
- University of Melbourne; Werribee Victoria Australia
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11
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Expression of surface platelet receptors (CD62P and CD41/61) in horses with recurrent airway obstruction (RAO). Vet Immunol Immunopathol 2015; 164:87-92. [PMID: 25665521 DOI: 10.1016/j.vetimm.2015.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/01/2014] [Accepted: 01/06/2015] [Indexed: 12/23/2022]
Abstract
Recurrent airway obstruction (RAO) is an allergic disease of horses similar to human asthma, which is characterized by airway inflammation and activation of neutrophils, lymphocytes and platelets. Platelet activation and an increase in circulating platelet-leukocyte aggregates may lead to airway remodeling. The aim of this study was to investigate platelet status in RAO-affected horses based on the platelet morphology and platelet surface expression of CD41/61 and CD62P. Ten RAO-affected horses and ten healthy horses were included in this study. Blood samples were obtained to determine the platelet count (PLT), mean platelet volume (MPV) and platelet large cell ratio (P-LCR). Expression of CD62P and CD41/61 was detected by flow cytometry on activated platelets. The median PLT was significantly reduced in horses with RAO compared to the controls. The MPV and the P-LCR values were significantly higher in RAO horses than controls. Expression of CD41/61 on platelets was increased in RAO horses, while CD62P expression was reduced. This study demonstrated the morphological changes in platelets and expression of platelet surface receptors. Despite the decrease of CD62P expression, the observed increased surface expression of CD41/61 on platelets in horses with RAO may contribute to the formation of platelet aggregates in their respiratory system.
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12
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Jackson AE, Metzl N. In this issue - July 2012. Aust Vet J 2012. [DOI: 10.1111/j.1751-0813.2012.00960.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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