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Cheung H, Jandrey KE, Burges J, Brooks M, Kent MS. An in vitro study of canine cryopoor plasma to correct vitamin K-dependent coagulopathy in dogs. J Vet Emerg Crit Care (San Antonio) 2021; 31:231-238. [PMID: 33749109 DOI: 10.1111/vec.13049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 10/15/2019] [Accepted: 10/29/2019] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To compare the efficacy of fresh frozen plasma (FFP) with cryopoor plasma (CPP) to treat vitamin K-dependent factor deficiency in a canine in vitro setting. DESIGN In vitro laboratory study. SETTING University veterinary medical teaching hospital. ANIMALS Seven units of FFP and 6 units of CPP from unique canine donors from the university veterinary blood bank. INTERVENTIONS Canine FFP was adsorbed by oral barium sulfate suspension to mimic vitamin K-dependent coagulopathy. A sequential mixing study was completed by adding FPP or CPP to the adsorbed plasma. Measurements of prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen, and factor activities of factors II, VII, and IX (FII, FVII, and FIX) were compared between the 2 treatment groups. MEASUREMENTS AND MAIN RESULTS When comparing the sequential addition of CPP or FPP to adsorbed plasma, the following had no statistical significance: PT (P = 0.94), aPTT (P = 0.66), FII (P = 0.05), and FIX (P = 0.90). There was a dose-dependent decrease with PT and aPTT and a dose-dependent increase with FII and FIX. In contrast, after the addition of either CPP or FFP, there was a significant difference between the treatment groups for the concentration of fibrinogen (P = 0.005) and activity of FVII (P = 0.044), with FFP resulting in a greater concentration of fibrinogen and CPP resulting in a greater concentration of FVII. Measurements of factor X (FX) were initially included in the study but were later excluded because FX appeared to be continually adsorbed even after the addition of CPP or FFP. CONCLUSIONS CPP partially corrected the coagulation times and concentration of vitamin K-dependent coagulation factors to the same degree as FFP. CPP, generally less expensive than FFP, may provide an alternative treatment option for vitamin K-dependent coagulopathies, although in vivo testing is needed.
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Affiliation(s)
- Hilvy Cheung
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, Davis, CA, 95616, USA
| | - Karl E Jandrey
- Department of Veterinary Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, 95616, USA
| | - Julie Burges
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, Davis, CA, 95616, USA
| | - Marjory Brooks
- Cornell University College of Veterinary Medicine, Ithaca, New York
| | - Michael S Kent
- Department of Veterinary Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, 95616, USA
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2
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Soto E, Tamez-Trevino E, Yazdi Z, Stevens BN, Yun S, Martínez-López B, Burges J. Non-lethal diagnostic methods for koi herpesvirus in koi Cyprinus carpio. Dis Aquat Organ 2020; 138:195-205. [PMID: 32213667 DOI: 10.3354/dao03456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cyprinid herpesvirus 3, also known as koi herpesvirus (KHV), is a viral pathogen responsible for mass mortalities of carp worldwide. In this study, we compared the sensitivity and specificity of ELISA and quantitative PCR (qPCR) methods for the diagnosis of KHV in experimentally infected koi Cyprinus carpio over an 11 mo period. Koi were exposed to KHV at 18 ± 1°C (permissive temperatures for KHV disease) in laboratory-controlled conditions. At 21 d post challenge, the temperature in the system was decreased to <15°C (non-permissive temperature for KHV disease), and fish were monitored for the following 11 mo. At different time points throughout the study, samples of blood and gills were collected from exposed and control koi and subjected to qPCR and ELISA. Survival proportions of 53.3 and 98.8% in exposed and control treatments, respectively, were recorded at the end of the challenge. Traditional receiver-operating characteristic analysis was used to compare the sensitivity of the ELISA and blood and gill qPCR during permissive and non-permissive temperatures. ELISA was superior to qPCR of gills and whole-blood samples in detecting previous exposure to KHV. Similar results were obtained in a second experiment exposing koi to KHV and inducing persistent infection at >30°C (non-permissive temperature for KHV disease). Finally, KHV ELISA specificity was confirmed using cyprinid herpesvirus 1-exposed koi through a period of 3 mo. This study demonstrates that the combination of ELISA and gill qPCR should be recommended in the diagnosis of KHV exposure of suspected carrier-state fish.
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Affiliation(s)
- Esteban Soto
- Department of Medicine & Epidemiology, School of Veterinary Medicine, University of California, Davis, California 95616, USA
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Burton AG, Burges J, Borchers A, Hopper K. In vitro assessment of the effect of acidemia on coagulation in dogs. J Vet Emerg Crit Care (San Antonio) 2018; 28:168-172. [DOI: 10.1111/vec.12697] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 04/17/2016] [Accepted: 05/22/2016] [Indexed: 11/28/2022]
Affiliation(s)
| | - Julie Burges
- the Regenerative Medicine Laboratory; University of California; Davis CA
| | | | - Kate Hopper
- the Department of Surgical and Radiological Sciences; School of Veterinary Medicine
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Raleigh JS, Jandrey KE, Burges J, Kent MS. Factors Affecting Platelet Concentration in Platelet Concentrates from Canine Blood Donors. J Vet Intern Med 2017; 31:759-763. [PMID: 28421625 PMCID: PMC5435050 DOI: 10.1111/jvim.14719] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/10/2017] [Accepted: 03/23/2017] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Physiologic factors in dogs that might contribute to enhanced platelet yield in platelet concentrates (PCs) are largely unknown. OBJECTIVE To determine whether individual differences in weight, age, preprocessing blood chemistry, and CBC variables predict the final platelet concentrations in PCs. Our hypotheses were (1) increased lipemic indices would be positively associated with increased platelet concentrations in PCs and (2) increased preprocessing platelet concentrations would be associated with higher platelet concentrations in the PCs. ANIMALS All blood donation records of dogs from February 2, 2009 through April 1, 2015 at the University of California-Davis Veterinary Blood Bank were examined with 104 cases included in this study. METHODS In this retrospective study, data were collected from medical records of canine blood donors. Records were reviewed for internal consistency and accuracy and subjects were included in the study if donor screening and donation occurred on the same day and a viable PC was obtained. Univariate and multivariable regressions were used to test the impact that each variable had on the final platelet concentration in PCs. RESULTS Final platelet concentration in PCs was positively associated with the predonation CBC platelet values (P < .001), lipemic index (P = .01), and phosphorous levels (P = .001). Collectively these 3 variables explained 29% of the variance in platelet concentrations in PCs. CONCLUSIONS AND CLINICAL IMPORTANCE Future prospective studies are required to determine if canine blood donations from dogs with lipemia yield PCs with higher platelet concentrations without negatively affecting other blood components.
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Affiliation(s)
- J S Raleigh
- William R. Pritchard Veterinary Medical Teaching Hospital, University of California Davis School of Veterinary Medicine, Davis, CA
| | - K E Jandrey
- Department of Surgical and Radiological Sciences, University of California Davis School of Veterinary Medicine, Davis, CA
| | - J Burges
- William R. Pritchard Veterinary Medical Teaching Hospital, University of California Davis School of Veterinary Medicine, Davis, CA
| | - M S Kent
- Department of Surgical and Radiological Sciences, University of California Davis School of Veterinary Medicine, Davis, CA
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5
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Burton AG, Clark KC, Borjesson DL, Carrade DD, Burges J, Owens SD. Equine bone marrow volume reduction, red blood cell depletion, and mononuclear cell recovery using the PrepaCyte-CB processing system. Vet Clin Pathol 2015; 44:188-93. [PMID: 25627833 DOI: 10.1111/vcp.12236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Volume reduction and RBC depletion of equine bone marrow specimens are necessary processing steps for the immediate therapeutic use of bone marrow (BM)-derived mesenchymal stem cells (MSC), and for MSC expansion in culture. OBJECTIVES The purpose of the study was to evaluate the ability of the PrepaCyte-CB processing system to reduce volume, deplete RBC, and recover mononuclear cells (MNC) from equine BM specimens. METHODS One hundred and twenty mL of heparinized BM were obtained from each of 90 horses. A CBC was performed on the BM pre- and post-PrepaCyte-CB processing. Volume and RBC reduction, and total nucleated cell (TNC) and MNC recoveries were determined. RESULTS Bone marrow volume was reduced from 120 mL to 21 mL with a median RBC depletion of 90.1% (range, 62.0-96.7%). The median preprocessing total TNC count was 2.2 × 10(9) (range, 0.46-7.9 × 10(9)) and the median postprocessing TNC count was 1.7 × 10(9) (range, 0.3-4.4 × 10(9); P < .0001), with a median recovery of 73.5% (range, 22.4-216.7%). The median preprocessing total MNC count was 0.9 × 10(9) (range, 0.1-4.7 × 10(9)) and median postprocessing total MNC count was 0.8 × 10(9) (range, 0.1-2.7 × 10(9); P = .06), with a median recovery of 83.7% (range, 15.4-413.9%). CONCLUSIONS The PrepaCyte-CB processing system can be used to deplete both volume and RBC, and recover MNC from equine BM specimens. Further studies assessing the viability of MSC and the efficacy of MSC expansion after using the PrepaCyte-CB processing system are warranted.
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Affiliation(s)
- Andrew G Burton
- Veterinary Medical Teaching Hospital, University of California-Davis, Davis, CA, USA
| | - Kaitlin C Clark
- Regenerative Medicine Laboratory, University of California-Davis, Davis, CA, USA
| | - Dori L Borjesson
- Department of Pathology, Microbiology and Immunology, University of California-Davis, Davis, CA, USA
| | - Danielle D Carrade
- Department of Pathology, Microbiology and Immunology, University of California-Davis, Davis, CA, USA
| | - Julie Burges
- Regenerative Medicine Laboratory, University of California-Davis, Davis, CA, USA
| | - Sean D Owens
- Department of Pathology, Microbiology and Immunology, University of California-Davis, Davis, CA, USA
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Hoareau GL, Jandrey KE, Burges J, Bremer D, Tablin F. Comparison of the platelet-rich plasma and buffy coat protocols for preparation of canine platelet concentrates. Vet Clin Pathol 2014; 43:513-8. [DOI: 10.1111/vcp.12195] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Guillaume L. Hoareau
- William R. Pritchard Veterinary Medical Teaching Hospital; University of California-Davis; Davis CA USA
| | - Karl E. Jandrey
- Department of Surgical and Radiological Sciences; University of California-Davis; Davis CA USA
| | - Julie Burges
- Transfusion Medicine Service; William R. Pritchard Veterinary Medical Teaching Hospital; University of California-Davis; Davis CA USA
| | - Daphne Bremer
- Vanderbilt Institute for Global Health; Nashville TN USA
| | - Fern Tablin
- Anatomy, Physiology and Cell Biology; School of Veterinary Medicine; University of California-Davis; Davis CA USA
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7
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Owens SD, Burges J, Johns JL, Carrade DD, Galuppo LD, Librach F, Borjesson DL. Processing of equine bone marrow using the automated MarrowXpress System: RBC depletion, volume reduction, and mononuclear cell recovery. Vet Clin Pathol 2011; 40:444-449. [DOI: 10.1111/j.1939-165x.2011.00368.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 03/16/2011] [Accepted: 03/26/2011] [Indexed: 11/30/2022]
Affiliation(s)
- Sean D. Owens
- Department of Pathology, Microbiology and Immunology
| | | | | | | | - Larry D. Galuppo
- Department of Surgical & Radiological Sciences; School of Veterinary Medicine; University of California-Davis; Davis CA USA
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Abstract
Muscle weakness in myasthenia gravis is due to autoantibody-induced loss of functional acetylcholine receptors (AChR). About 15% of myasthenia gravis patients, however, do not have detectable anti-AChR antibodies. To investigate the effect of their plasma immunoglobulins on neuromuscular transmission, mice were injected with plasma (and in some cases purified immunoglobulin G (IgG)) from 7 "seronegative" myasthenia gravis (SMG) patients, and neuromuscular transmission parameters were examined. When injected for 15 days, all patients' plasma caused reductions in miniature endplate potential amplitudes, while endplate potential quantal content was significantly reduced by plasma from 4 of the 7 patients. There were no changes in ACh-induced depolarization or single channel properties, and 125I-alpha-bungarotoxin binding studies showed no effect on AChR number, except in 1 case. Purified IgG injected for 3 days had similar effects to plasma injected for 15 days. Our findings confirm that SMG is autoantibody mediated and that there are pathogenic IgG antibodies. SMG appears to be a heterogeneous disorder and the target(s) for the antibodies may be diverse.
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Affiliation(s)
- J Burges
- Department of Pharmacology, Leeds University, United Kingdom
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Vincent A, Li Z, Hart A, Barrett-Jolley R, Yamamoto T, Burges J, Wray D, Byrne N, Molenaar P, Newsom-Davis J. Seronegative myasthenia gravis. Evidence for plasma factor(s) interfering with acetylcholine receptor function. Ann N Y Acad Sci 1993; 681:529-38. [PMID: 8395163 DOI: 10.1111/j.1749-6632.1993.tb22936.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- A Vincent
- Department of Clinical Neurology, University of Oxford, United Kingdom
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10
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León X, Burges J, Quer M, Esteller E, Alejo M, Oliva E, Lacasta A, Vega JM. [A retropharyngeal synovial sarcoma]. Acta Otorrinolaringol Esp 1992; 43:283-6. [PMID: 1329874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The synovial sarcomas constitute the 7-10% of the soft tissue malign tumors, with a preferred location in the limbs. In the head and neck a 5% of the totality are placed. We present one case of retropharyngeal synovial sarcoma and the accomplished treatment, together with a revision of the bibliography.
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Affiliation(s)
- X León
- Servico de ORL, Hospital de la Santa Creu i Sant Pau, Universitat Autónoma de Barcelona
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11
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Burges J, Wray DW, Pizzighella S, Hall Z, Vincent A. A myasthenia gravis plasma immunoglobulin reduces miniature endplate potentials at human endplates in vitro. Muscle Nerve 1990; 13:407-13. [PMID: 2345558 DOI: 10.1002/mus.880130507] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A particular myasthenia gravis (MG) plasma Ig has previously been shown to block a single alpha-bungarotoxin (alpha-BuTx) binding site on embryonic rat muscle acetylcholine receptor (AChR). We have investigated its effect on embryonic/denervated and adult human AChR both in extracts and in situ. Plasma Ig blocked 125I-alpha-BuTx binding by greater than 85% to the AChR extracted from denervated muscle, but only by 55% to AChR extracted from normal human muscle. Incubation of intact human muscle fibers with the plasma Ig reduced 125I-alpha-BuTx binding to the endplate AChRs by 63%, and substantially decreased the amplitude of miniature endplate potentials. We conclude that anti-alpha-BuTx site antibodies, when present, can be important in the pathophysiology of the disease.
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Affiliation(s)
- J Burges
- Department of Pharmacology, Royal Free Hospital School of Medicine, London, UK
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12
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Newsom-Davis J, Willcox N, Schluep M, Harcourt G, Vincent A, Mossman S, Wray D, Burges J. Immunological heterogeneity and cellular mechanisms in myasthenia gravis. Ann N Y Acad Sci 1987; 505:12-26. [PMID: 2825574 DOI: 10.1111/j.1749-6632.1987.tb51279.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- J Newsom-Davis
- Department of Neurological Science, Royal Free Hospital School of Medicine, London, England
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