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Reuter A, DeFrancesco TC, Robertson JB, Meurs KM. Clinical outcome of idiopathic juvenile ventricular arrhythmias in 25 dogs. J Vet Cardiol 2023; 51:188-194. [PMID: 38168659 DOI: 10.1016/j.jvc.2023.12.001] [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: 06/29/2023] [Revised: 11/20/2023] [Accepted: 12/01/2023] [Indexed: 01/05/2024]
Abstract
INTRODUCTION/OBJECTIVES Juvenile ventricular arrhythmias in the absence of structural heart disease have been characterized in a small number of canine breeds with limited long-term follow up. The objective of this study was to describe the clinical outcome of dogs with JVA presenting to a university teaching hospital. ANIMALS, MATERIALS, METHODS 25 dogs, less than two years old with idiopathic ventricular arrhythmias were retrospectively identified via a medical record search. Young dogs with ventricular arrhythmias were excluded if they had structural heart disease, systemic illness, or an abnormal troponin (if performed). Electrocardiographic and Holter monitor data was evaluated for arrhythmia frequency and complexity at the time of diagnosis and over time. Long-term follow up was achieved through client and primary veterinarian contact. RESULTS Breeds included German Shepherd (8), Boxer (4), Great Dane (3), mixed breed (2) and one each of the following: Anatolian Shepherd, French Bulldog, Golden Retriever, Great Pyrenees, Labrador Retriever, Shiloh Shepherd, Miniature Poodle and Siberian Husky. The average age at diagnosis was 7.9 months (range, 2-22 months). The overall median survival was 10.96 years (range, 1.75-15.66 years). There was an average reduction in the number of ventricular beats by 86.7 % per year (P value -0.0257) based on Holter data. CONCLUSION In most cases, idiopathic juvenile ventricular arrhythmias had a favorable long-term prognosis with reduced ectopy over time in this case series. Juvenile ventricular arrhythmias remains a diagnosis of exclusion but can be considered in a broader range of dog breeds than previously described.
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Affiliation(s)
- A Reuter
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, 625 Harrison St, West Lafayette, IN, 47907, USA
| | - T C DeFrancesco
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1052 William Moore Dr., Raleigh, NC, 27607, USA.
| | - J B Robertson
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, 625 Harrison St, West Lafayette, IN, 47907, USA
| | - K M Meurs
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1052 William Moore Dr., Raleigh, NC, 27607, USA
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2
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Hale LM, Kapp SL, Robertson JB, Lewbart GA, Ozawa SM. The clinical features and treatment of fishhook injuries in freshwater turtles: 126 cases from 1997-2022. J Am Vet Med Assoc 2023; 261:1829-1837. [PMID: 37541676 DOI: 10.2460/javma.23.03.0146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 07/11/2023] [Indexed: 08/06/2023]
Abstract
OBJECTIVE To describe the clinical features, treatment, and outcomes of wild freshwater turtles with fishing hook injuries. ANIMALS 126 wild turtles residing in central North Carolina that were presented to a wildlife rescue clinic. METHODS Medical records from July 1997 to July 2022 were reviewed, and data were collected and analyzed. RESULTS The most common species presenting for a fishhook injury was the yellow-bellied slider (Trachemys scripta scripta) (n = 69/126 [54.8%]; 95% CI, 45.7 to 63.6). The most common location identified was the oral cavity (n = 77/140 [55%]; 95% CI, 46.4 to 63.4) and the most common removal method was retrograde removal after cutting the barb off of the hook (76/120 [63.3%]; 95% CI, 54.1 to 71.9). Fishhooks embedded in the esophagus had a significantly higher chance of complications affecting recovery (OR estimate, 3.49; 95% CI, 1.07 to 11.38). There was no significant increase in mortality associated with the location of the injury; however, there was a significant increase in mortality in patients that experienced complications (P < 0.001). The time in care ranged from 1 to 150 days (median, 16 days). Of the turtles evaluated, 10.8% (n = 12/111; 95% CI, 5.7 to 18.1) were euthanized or died after treatment and 89.2% (99/111; 95% CI, 81.9 to 94.3) were released. CLINICAL RELEVANCE These findings describe various successful techniques to remove fishhooks from turtles. While no superior treatment was identified, considerations should be taken to provide patient comfort, decrease injury-associated complications, and shorten recovery time by using minimally invasive techniques. Overall, freshwater turtles with fishhook injuries have a high release rate even when the injuries are severe.
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Affiliation(s)
- Lily M Hale
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Sabrina L Kapp
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - James B Robertson
- 2Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Gregory A Lewbart
- 3Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Sarah M Ozawa
- 3Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
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3
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Himebaugh NE, Robertson JB, Weninger K, Gilger BC, Ekesten B, Oh A. Ex Vivo analysis of ultraviolet radiation transmission through ocular media and retina in select species. Exp Eye Res 2023:109550. [PMID: 37356536 DOI: 10.1016/j.exer.2023.109550] [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: 03/30/2023] [Revised: 06/09/2023] [Accepted: 06/22/2023] [Indexed: 06/27/2023]
Abstract
The aim of this study was to assess the transmission of the ultraviolet (UV) radiation (200-400 nm) through intact enucleated globes of different species (dogs, cats, pigs, rabbits, horses, and humans) using spectrophotometry. Globes of cats (n = 6), dogs (n = 18), pigs (n = 10), rabbits (n = 6), horses (n = 10), and humans (n = 4) were analyzed. A 5-10 mm circular area of sclera and choroid from the posterior aspect of the globe was removed under a surgical microscope, leaving the retina intact in all species except the horse. Glass coverslips were added in horses and rabbits due to retinal and globe fragility. The %T of wavelengths from 200 to 800 nm were measured through the ocular media (cornea, aqueous humor, lens, and vitreous humor) and retina, and compared between species. The globes of cats and dogs allowed the most amount of UV radiation transmission, while those of pigs and humans allowed the least amount of UV radiation transmission. A small amount of UV radiation transmission through the ocular media was detected in the rabbit and horse. Results from this study will support further vision research that may be used to train companion, working, and service animals.
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Affiliation(s)
- Nicole E Himebaugh
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, 1060 William Moore Dr, Raleigh, NC, 27606, USA.
| | - James B Robertson
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, 1060 William Moore Dr, Raleigh, NC, 27606, USA; Office of Research, North Carolina State University College of Veterinary Medicine, Raleigh, NC, USA.
| | - Keith Weninger
- Department of Physics, North Carolina State University, 2401 Stinson Dr, Raleigh, NC, 27607, USA.
| | - Brian C Gilger
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, 1060 William Moore Dr, Raleigh, NC, 27606, USA.
| | - Bjorn Ekesten
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Almas Allé 8, 750 07, Uppsala, Sweden.
| | - Annie Oh
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, 1060 William Moore Dr, Raleigh, NC, 27606, USA.
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4
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Lynch AM, Ruterbories LK, Robertson JB, Lunn KF, Mowat FM. Hemostatic profiles in dogs with sudden acquired retinal degeneration syndrome. J Vet Intern Med 2023; 37:948-959. [PMID: 37073895 PMCID: PMC10229342 DOI: 10.1111/jvim.16710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 03/24/2023] [Indexed: 04/20/2023] Open
Abstract
BACKGROUND Sudden acquired retinal degeneration syndrome (SARDS) is a common cause of irreversible blindness in dogs. It bears clinical resemblance to hypercortisolism, which can be associated with hypercoagulability. The role of hypercoagulability in dogs with SARDS is unknown. OBJECTIVE Determine hemostatic profiles in dogs with SARDS. ANIMALS Prospective pilot study: Dogs with a history of SARDS (n = 12). Prospective case-control study: Dogs with recent onset of SARDS (n = 7) and age-, breed-, and sex-matched controls (n = 7). METHODS Prospective pilot study: We performed thromboelastography (TEG). Prospective case-control study: Dogs had CBC, serum biochemistry, urinalysis, TEG, fibrinogen concentration, antithrombin activity, D-dimers, thrombin-antithrombin complexes, and optical platelet aggregometry performed. RESULTS Prospective pilot study: 9/12 dogs with a history of SARDS were hypercoagulable with increased TEG G value and 2/3 had hyperfibrinogenemia. Case-control study: All dogs with SARDS and 5/7 controls were hypercoagulable based on TEG G value. Dogs with SARDS had significantly higher G values (median, 12.7 kdynes/s; range, 11.2-25.4; P = .04) and plasma fibrinogen concentration (median, 463 mg/dL; range, 391-680; P < .001) compared to controls. CONCLUSIONS AND CLINICAL IMPORTANCE Hypercoagulability was common in both dogs with SARDS and controls, but dogs with SARDS were significantly more hypercoagulable on TEG. The role of hypercoagulability in the pathogenesis of SARDS remains to be determined.
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Affiliation(s)
- Alex M. Lynch
- Department of Clinical Sciences, College of Veterinary MedicineNorth Carolina State UniversityRaleighNorth Carolina27606USA
| | - Laura K. Ruterbories
- Department of Clinical Sciences, College of Veterinary MedicineNorth Carolina State UniversityRaleighNorth Carolina27606USA
| | - James B. Robertson
- College of Veterinary MedicineNorth Carolina State UniversityRaleighNorth Carolina27606USA
| | - Katharine F. Lunn
- Department of Clinical Sciences, College of Veterinary MedicineNorth Carolina State UniversityRaleighNorth Carolina27606USA
| | - Freya M. Mowat
- Department of Clinical Sciences, College of Veterinary MedicineNorth Carolina State UniversityRaleighNorth Carolina27606USA
- Department of Surgical Sciences, School of Veterinary MedicineUniversity of Wisconsin‐MadisonMadisonWisconsin53706USA
- Department of Ophthalmology and Visual Sciences, School of Medicine and Public HealthUniversity of Wisconsin‐MadisonMadisonWisconsin53706USA
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5
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Smith HL, Berglund AK, Robertson JB, Schnabel LV, McMullen RJ, Gilger BC, Oh A. Effect of gentamicin on CD3+ T-lymphocyte proliferation for treatment of equine recurrent uveitis: An in vitro study. Vet Ophthalmol 2023. [PMID: 37116984 DOI: 10.1111/vop.13098] [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: 10/05/2022] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 04/30/2023]
Abstract
OBJECTIVE The objective of the study was to determine the effect of gentamicin on CD3+ T-lymphocyte proliferation and cell viability using an in vitro cell culture model as a means of investigating the mechanism of action of low-dose intravitreal gentamicin injection. ANIMALS STUDIED Three adult horses with no evidence of ophthalmic or systemic disease. PROCEDURE Peripheral blood lymphocytes were treated with gentamicin at concentrations 37.5 μg/mL, 112.5 μg/mL, 187 μg/mL, 375 μg/mL, or 750 μg/mL then stimulated to proliferate with concanavalin A (ConA). 4',6-diamidino-2-phenylindole (DAPI) and carboxyfluoroscein succinimidyl ester (CSFE) were used as markers of cell viability and cell proliferation, respectively. Following 5-day culture, live cell counts and CSFE fluorescent intensity data were collected via automated cell count and flow cytometry. The experimental design was duplicated using preservative-free gentamicin and a proprietary brand formulation. Statistical analysis was performed using two-way ANOVA with Tukey's multiple comparison test. RESULTS No statistically significant comparisons in CD3+ T-lymphocyte live cell counts and geometric mean fluorescent intensity of CSFE were identified between gentamicin concentrations or formulations. CONCLUSIONS Gentamicin had no effect on equine peripheral blood CD3+ T-lymphocyte cell viability and proliferation in concentrations ranging from "safe" to "retinotoxic" in relation to intravitreal injection volumes. Low-dose intravitreal gentamicin may not suppress the Th1- and Th17-mediated immune response.
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Affiliation(s)
- Hannah L Smith
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
| | - Alix K Berglund
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
- Comparative Medicine Institute, North Carolina State University, North Carolina, Raleigh, USA
| | - James B Robertson
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
- Office of Research, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
| | - Lauren V Schnabel
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
- Comparative Medicine Institute, North Carolina State University, North Carolina, Raleigh, USA
| | - Richard J McMullen
- JT Vaughan Large Animal Teaching Hospital, College of Veterinary Medicine, Auburn University, Alabama, Auburn, USA
| | - Brian C Gilger
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
| | - Annie Oh
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, North Carolina, Raleigh, USA
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6
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Knight LN, Royal KD, Robertson JB. Hurdles of Cataract Surgery: Veterinary Ophthalmology Resident's Perspective (Part B). J Vet Med Educ 2023:e20220082. [PMID: 36888897 DOI: 10.3138/jvme-2022-0082] [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] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The purpose of this study was to describe veterinary ophthalmology residents' perceived preparedness for performing cataract surgery who are currently enrolled in, or recently graduated from, veterinary academic or private practice institutions. A descriptive survey was distributed online to 127 residents at academic and private practice training programs in the United States. The survey included items about educational resources available for residents and techniques commonly taught during cataract surgery. Residents were asked to describe their perceived preparedness in performing various surgical steps or techniques, difficulty of each surgical step, and the available educational resources. Thirty-five (27.5%) residents completed the survey and were included in this study. Residents who had access to wet labs gained surgical competency in creating a clear corneal incision, capsulorhexis, and wound closure. They reported sculpting with the phacoemulsification handpiece, quadrant or cortical removal, and capsulorhexis as most difficult and were not as prepared or a little prepared in performing capsulorhexis and sculpting during active phacoemulsification. When comparing residents' perceived competency before and after their first surgical experience, there was a significant change in their ability to perform all surgical steps except hydrodissection (p < .05). Cataract surgery is one of the more advanced surgical skills obtained during residency training. Supervised wet lab time improves a resident's preparedness for executing certain surgical steps. However, further research is needed to determine whether educational resources such as structured curriculum or virtual simulation may improve residents' preparedness for executing surgical steps not easily replicated in a wet lab.
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Affiliation(s)
- LaTisha N Knight
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607 USA
| | - Kenneth D Royal
- Office of Academic Affairs, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061 USA. Comparative Ophthalmology, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607 USA
| | - James B Robertson
- Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607 USA
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7
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Cassady KR, Balko JA, Bailey KM, Posner LP, Robertson JB, Minter LJ. EVALUATION OF OSCILLOMETRIC BLOOD PRESSURE MEASUREMENT USING A FINGER CUFF IN ANESTHETIZED CHIMPANZEES ( PAN TROGLODYTES). J Zoo Wildl Med 2023; 54:16-22. [PMID: 36971624 DOI: 10.1638/2021-0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2022] [Indexed: 03/29/2023] Open
Abstract
Cardiovascular disease is common among chimpanzees (Pan troglodytes), and serial blood pressure monitoring in conscious animals may improve disease surveillance and guide hypertension treatment strategies. The objective of this study was to compare the accuracy of a noninvasive, oscillometric blood pressure monitor using a finger blood pressure cuff with invasively measured blood pressure in anesthetized chimpanzees. Twelve chimpanzees were anesthetized with tiletamine-zolazepam intramuscularly, intubated, and maintained on inhaled isoflurane to effect. Blood pressure measurements, which included systolic arterial pressure (SAP), mean arterial pressure (MAP), and diastolic arterial pressure (DAP), were collected simultaneously from an oscillometric blood pressure cuff placed on a forelimb digit (FBP) and a direct arterial catheter (IBP) every 5-10 min while anesthetized. One hundred paired samples were collected, and results were compared using Bland-Altman plots and analysis. FBP showed good agreement with IBP for SAP, MAP, and DAP but consistently overestimated values compared with IBP. FBP may be useful for serial blood pressure monitoring in conscious chimpanzees.
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Affiliation(s)
- Katherine R Cassady
- Department of Molecular Biomedical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, NC 27606, USA
| | - Julie A Balko
- Department of Molecular Biomedical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, NC 27606, USA,
| | - Kate M Bailey
- Department of Molecular Biomedical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, NC 27606, USA
| | - Lysa P Posner
- Department of Molecular Biomedical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, NC 27606, USA
| | - James B Robertson
- Office of Research, North Carolina State University, College of Veterinary Medicine, Raleigh, NC 27606, USA
| | - Larry J Minter
- Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, NC 27606, USA
- North Carolina Zoo, Asheboro, NC 27205, USA
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8
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Stonex TM, Watanabe TTN, Robertson JB, Westermeyer HD. Equine pectinate ligament descemetization is associated with age. Vet Ophthalmol 2023; 26:225-230. [PMID: 36802129 DOI: 10.1111/vop.13071] [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: 09/06/2022] [Revised: 01/18/2023] [Accepted: 02/02/2023] [Indexed: 02/21/2023]
Abstract
PURPOSE To evaluate the correlation between equine pectinate ligament descemetization and ocular disease. METHODS The pathology database of the North Carolina State University Veterinary Medical Center was searched from 2010-2021 for all equine globes. Disease status was then assigned as affected by glaucoma, uveitis, or "other" based upon clinical records. The iridocorneal angles (ICA) of each globe were evaluated for the presence of pectinate ligament descemetization, the length of descemetization, as well as for the degree of angle collapse and the extent of cellular infiltrate or proteinaceous debris. One slide from each eye was evaluated by two separate, blinded investigators (HW & TS). RESULTS A total of 66 eyes from 61 horses were identified, with a total of 124 sections of ICA of sufficient quality to review. 16 horses were affected by uveitis, 8 by glaucoma, 7 by both glaucoma and uveitis, and 30 horses by other ocular disease, most commonly ocular surface disease or neoplasia, which served as controls. Pectinate ligament descemetization was most prevalent in the control group compared to the glaucoma and uveitis groups. Pectinate ligament descemetization length was positively correlated with age, with an increase of 13.5 μm per year of age (p = .016). Infiltrate scores and angle closure scores were higher in both the glaucoma and uveitis group compared to the control group (p < .001). CONCLUSIONS Equine pectinate ligament descemetization appears to be correlated with increased age and should not be used as a histologic marker for the presence of glaucoma.
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Affiliation(s)
- Tara M Stonex
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | | | - James B Robertson
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Hans D Westermeyer
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
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9
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Hepworth-Warren KL, Erwin SJ, Moore CB, Talbot JR, Young KAS, Neault MJ, Haugland JC, Robertson JB, Blikslager AT. Risk factors associated with an outbreak of equine coronavirus at a large farm in North Carolina. Front Vet Sci 2023; 10:1060759. [PMID: 36937023 PMCID: PMC10020641 DOI: 10.3389/fvets.2023.1060759] [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: 10/03/2022] [Accepted: 02/16/2023] [Indexed: 03/06/2023] Open
Abstract
Background Equine coronavirus (ECoV) leads to outbreaks with variable morbidity and mortality. Few previous reports of risk factors for infection are available in the literature. Objectives To describe unique clinical findings and risk factors for infection and development of clinical disease. Animals 135 horses on a farm affected by ECoV outbreak. Methods Retrospective cohort study. Data obtained included age, breed, gender, activity level, housing, and feed at the onset of the outbreak. Factors were evaluated for assessment of risk of infection using simple logistic regression or Fisher's exact test. Significance was set at p ≤ 0.05. Results and findings Forty-three of 54 (79.6%) horses tested on the farm were positive on fecal PCR for ECoV, and 17 horses (12.6%) developed clinical signs consistent with ECoV. Out of 17 horses in which the presence or absence of signs of colic was noted, 6 of 17 (35.3%) showed signs of colic. Three of these horses had small colon impactions, 2 of which required surgical intervention. Significant risk factors for having positive PCR results included being primarily stalled (OR 167.1, 95% CI 26.4-1719), housing next to a positive horse (OR 7.5, 95% CI 3.1-19.0), being in work (OR 26.9, 95% CI 4.6-281.9), being fed rationed hay vs. ad libitum (OR 1,558, 95% CI 130.8-15,593), and being fed alfalfa hay (OR 1,558, 95% CI 130.8-15,593). Conclusions and clinical importance This report describes risk factors for ECoV infection many of which were associated with intensive management of show horses. Clinicians should be aware that clinical signs vary and can include severe colic.
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Affiliation(s)
- Kate L. Hepworth-Warren
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
- *Correspondence: Kate L. Hepworth-Warren
| | - Sara J. Erwin
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | | | | | - Kimberly A. S. Young
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Michael J. Neault
- North Carolina Department of Agricultures and Consumer Services, Raleigh, NC, United States
| | - Jennifer C. Haugland
- Rollins Animal Disease Diagnostic Laboratory, North Carolina Department of Agriculture and Consumer Services, Raleigh, NC, United States
- North Carolina Veterinary Diagnostic Laboratory System, North Carolina Department of Agriculture and Consumer Services, Raleigh, NC, United States
| | - James B. Robertson
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Anthony T. Blikslager
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
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10
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McParland TJ, Horne CR, Robertson JB, Schnabel LV, Nelson NC. Alterations to the synovial invaginations of the navicular bone are associated with pathology of both the navicular apparatus and distal interphalangeal joint when evaluated using high field MRI. Vet Radiol Ultrasound 2023; 64:9-17. [PMID: 35969227 PMCID: PMC10087238 DOI: 10.1111/vru.13140] [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: 11/22/2021] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 01/25/2023] Open
Abstract
Limited information exists regarding associations between distal interphalangeal joint (DIPJ) abnormalities and synovial invagination changes in the distal sesamoid (navicular) bone. This retrospective, analytical study aimed to measure specific characteristics of the synovial invaginations of the navicular bone to determine whether any single characteristic was associated with abnormalities in the DIPJ or navicular apparatus (NA) using high field MRI and a sample of 200 horses' feet. The DIPJ and NA were graded independently by three scorers. The grades were averaged, creating a global pathology score for the DIPJ, NA, and synovial invaginations. Higher global scores represented more severe pathology. The number of invaginations, depth of penetration, invagination shape, and cross-sectional area (CSA) of the largest invagination were recorded. Interobserver agreement was measured using Cohen's Kappa. Associations of global scores of the DIPJ and NA with individual invagination characteristics were assessed using linear mixed modeling. A significant relationship was found between the number of invaginations and global DIPJ score, with higher invagination numbers associated with higher DIPJ scores. For invagination depth and CSA, a significant relationship was noted with global scores of both the DIPJ and NA. Reliable relationships between the shape of synovial invaginations and global scores of DIPJ and NA were not found, likely due to poor interobserver scoring (0.305). These findings suggest that primary DIPJ disease and NA pathology should be considered when noticing alterations to navicular synovial invaginations on MRI. This contrasts traditional views that synovial invagination abnormalities are indicative solely of NA pathology.
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Affiliation(s)
- Thomas J McParland
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina, 27607, USA
| | - Caitlyn R Horne
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina, 27607, USA
| | - James B Robertson
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina, 27607, USA.,Office of Research, College of Veterinary Medicine, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - Lauren V Schnabel
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina, 27607, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, NC, 27607, USA
| | - Nathan C Nelson
- Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina, 27607, USA
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11
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Villamizar-Martinez LA, Villegas CM, Duailibi E, Robertson JB, Soltero-Rivera M, Reiter AM, Chilvarquer I, Gioso MA. Morphometry and Morphology of the Articular Surfaces of the Medial Region of the Temporomandibular Joint in the Felis Catus (Domestic cat) - A Cone Beam Computed Tomography Study. J Vet Dent 2022; 40:134-142. [PMID: 36482686 DOI: 10.1177/08987564221141985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The articular surfaces of the temporomandibular joint (TMJ) in the cat consist of the articular head of the condylar process of the ramus of the mandible and the mandibular fossa of the petrous part of the temporal bone. Anatomic conformation of the TMJ articular surfaces can vary; however, this has not been studied in the cat. Thus, the aim of this study was to characterize the conformation of the medial region of the TMJ in mesocephalic adult cats as well as to determine the articular relationship by measurement of the degree of coverage of the mandibular fossa over the articular head. This was accomplished by assessing 60 TMJs from 30 mesocephalic adult cats by means of cone-beam computed tomography (CBCT). The width and depth of the mandibular fossa, and the degree of coverage of the mandibular fossa were evaluated using parasagittal reconstructions of the medial aspect of the TMJ by two observers. No statistically significant difference was observed during the intra and interobserver evaluation of the mandibular fossa width and depth and the degree of coverage of the mandibular fossa over the articular head. P-values for the studied variables were greater than 0.05. The resulting measurements demonstrated a concave mandibular fossa with a prominent retroarticular process and a poorly developed articular eminence; a well-defined rounded articular surface, and a high degree of coverage (171°) of the mandibular fossa over the articular head. In conclusion, the articular surfaces at the medial aspect of the TMJ displayed elevated geometric similarity, with an articular head of the condylar process deeply seated in the mandibular fossa.
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Affiliation(s)
- Lenin A. Villamizar-Martinez
- Dentistry and Oral Surgery Service, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Cristian M. Villegas
- Department of Exact Sciences, College of Agriculture Luiz de Queiroz, University of São Paulo, Piracicaba, SP, Brazil
| | - Eduardo Duailibi
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
| | - James B. Robertson
- Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Maria Soltero-Rivera
- Dentistry and Oral Surgery Service, Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Alexander M. Reiter
- Dentistry and Oral Surgery Service, Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Israel Chilvarquer
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
| | - Marco A. Gioso
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
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12
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Chalifoux NV, Butty EM, Mauro KD, Moyle RB, Ehrhardt CM, Robertson JB, Labato MA, Culler CA, Londoño LA, Vigani A, Ueda Y, Suter SE, Lynch AM. Outcomes of 434 dogs with non-steroidal anti-inflammatory drug toxicosis treated with fluid therapy, lipid emulsion, or therapeutic plasma exchange. Vet Med (Auckl) 2022; 37:161-172. [PMID: 36453531 PMCID: PMC9889694 DOI: 10.1111/jvim.16603] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 11/23/2022] [Indexed: 12/05/2022]
Abstract
BACKGROUND Traditional management of non-steroidal anti-inflammatory drug (NSAID) intoxication includes gastrointestinal decontamination, intravenous administration of fluids (IVF), and gastroprotection. Intravenous administration of lipid emulsion (ILE) and therapeutic plasma exchange (TPE) are popular novel therapeutic strategies. HYPOTHESIS Compare outcomes of dogs treated with IVF, ILE, and TPE for NSAID intoxications and evaluate outcome predictors for drug subgroups. ANIMALS Four hundred thirty-four dogs with NSAID intoxications (2015-2020). METHODS Multicenter retrospective study of ibuprofen, carprofen, and naproxen intoxication. An ordinal outcome was defined as mild gastrointestinal, moderate kidney, or signs of severe central nervous system disease. RESULTS Signs of neurological disease were overrepresented and acute kidney injury underrepresented in the TPE group among dogs exposed to kidney- or CNS-toxic doses (P = .05), though all TPE dogs with signs of neurological disease had evidence of neurotoxicity at presentation. Dogs treated with IVF had a higher maximal creatinine concentration (median, 1.1 mg/dL; range, 0.4-8.44 mg/dL) compared with IVF + ILE (median, 0.9 mg/dL; range, 0.4-6.2 mg/dL; P = .01). Increased maximum time to presentation (P < .001), higher baseline creatinine (P < .001) and PCV (P = .007), and absence of induced emesis (P < .001) were associated with greater clinical severity. Ibuprofen toxicosis was associated with more severe clinical signs compared with carprofen (P = .03). Overall survival rate was 99%. CONCLUSIONS AND CLINICAL IMPORTANCE NSAID toxicosis generally carries an excellent prognosis in dogs. Despite similar outcomes of lower incidence of AKI in the TPE group, and slightly lower maximal creatinine concentration in dogs treated with ILE vs IVF alone, ILE and TPE should be considered in the management of severe NSAID toxicosis.
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Affiliation(s)
- Nolan V. Chalifoux
- Department of Clinical Sciences & Advanced MedicineUniversity of Pennsylvania, School of Veterinary MedicinePhiladelphiaPennsylvaniaUSA
| | - Emmanuelle M. Butty
- Department of Clinical SciencesTufts University, Cummings School of Veterinary Medicine, Foster Hospital for Small AnimalsNorth GraftonMassachusettsUSA
| | - Katie D. Mauro
- Small Animal Clinical SciencesMichigan State University, College of Veterinary MedicineEast LansingMichiganUSA
| | | | - Caryn M. Ehrhardt
- Department of Small Animal Clinical SciencesUniversity of Florida, College of Veterinary MedicineGainesvilleFloridaUSA
| | - James B. Robertson
- Department of Clinical SciencesNorth Carolina State University, College of Veterinary MedicineRaleighNorth CarolinaUSA
| | - Mary A. Labato
- Department of Clinical SciencesTufts University, Cummings School of Veterinary Medicine, Foster Hospital for Small AnimalsNorth GraftonMassachusettsUSA
| | | | | | - Alessio Vigani
- Clinic for Small Animal Medicine, Vetsuisse FacultyUniversity of ZurichZurichSwitzerland
| | - Yu Ueda
- Department of Clinical SciencesNorth Carolina State University, College of Veterinary MedicineRaleighNorth CarolinaUSA
| | - Steven E. Suter
- Department of Clinical SciencesNorth Carolina State University, College of Veterinary MedicineRaleighNorth CarolinaUSA
| | - Alex M. Lynch
- Department of Clinical SciencesNorth Carolina State University, College of Veterinary MedicineRaleighNorth CarolinaUSA
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13
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Guillaumin J, DeFrancesco TC, Scansen BA, Quinn R, Whelan M, Hanel R, Goy-Thollot I, Bublot I, Robertson JB, Bonagura JD. Bilateral lysis of aortic saddle thrombus with early tissue plasminogen activator (BLASTT): a prospective, randomized, placebo-controlled study in feline acute aortic thromboembolism. J Feline Med Surg 2022; 24:e535-e545. [PMID: 36350753 DOI: 10.1177/1098612x221135105] [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] [Indexed: 11/11/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the impact of tissue plasminogen activator (TPA) on the treatment of feline aortic thromboembolism (FATE). METHODS Cats diagnosed with FATE involving ⩾2 limbs were enrolled in a prospective, multicenter, double-blinded, randomized, placebo-controlled study within 6 h of an event. Diagnosis was made by clinical findings and one confirmatory criterion. Cats received placebo or TPA (1 mg/kg/h with the first 10% by bolus). All cats received pain control and thromboprophylaxis. The primary outcome was a change from baseline in a published limb score at 48 h. Secondary outcomes included 48 h survival, survival to discharge and complication proportions. Statistical analyses included pattern-mixture models, logistic regression and Fisher's exact, Student's t- and Mann-Whitney-Wilcoxon tests. RESULTS Based on a power analysis, 40 cats were enrolled; however, only 20 survived to 48 h (TPA, n = 12; placebo, n = 8 [P = 0.34]). There was a statistically significant improvement in limb scores compared with baseline for both groups (P <0.001). Limb score at 48 h was 1 point lower (better) in the TPA group (P = 0.19). Thrombolysis had no statistically significant effect on 48 h survival (P = 0.22). Lower affected limb lactate was associated with better 48 h survival (odds ratio 1.53, 95% confidence interval 1.08-2.17; P = 0.02). The survival to discharge rates were 45% (TPA) and 30% (placebo; P = 0.51). Complications in the TPA and placebo groups included acute kidney injury (22% and 19%, respectively; P = 1.00) and/or reperfusion injuries (33% and 19%, respectively; P = 0.45). CONCLUSIONS AND RELEVANCE Survival and complication rates of acute FATE were not different with or without thrombolysis. High in-hospital mortality decreased the statistical power to detect a statistically significant difference between treatments with regard to our primary outcome.
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Affiliation(s)
- Julien Guillaumin
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Teresa C DeFrancesco
- Department of Clinical Sciences, North Carolina State University, Raleigh, NC, USA
| | - Brian A Scansen
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Rebecca Quinn
- Cape Cod Veterinary Specialists, Buzzards Bay, MA, USA
| | | | - Rita Hanel
- Veterinary Emergency Group, New York, NY, USA
| | - Isabelle Goy-Thollot
- Reconciliation Projet of ENV Françaises, VetAgro Sup, 69280 Marcy l'Etoile, France
| | | | - James B Robertson
- College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - John D Bonagura
- Department of Clinical Sciences, North Carolina State University, Raleigh, NC, USA.,Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
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14
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Moore MA, Scheible MK, Robertson JB, Meiklejohn KA. Assessing the lysis of diverse pollen from bulk environmental samples for DNA metabarcoding. MBMG 2022. [DOI: 10.3897/mbmg.6.89753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Pollen is ubiquitous year-round in bulk environmental samples and can provide useful information on previous and current plant communities. Characterization of pollen has traditionally been completed based on morphology, requiring significant time and expertise. DNA metabarcoding is a promising approach for characterizing pollen from bulk environmental samples, but accuracy hinges on successful lysis of pollen grains to free template DNA. In this study, we assessed the lysis of morphologically and taxonomically diverse pollen from one of the most common bulk environmental sample types for DNA metabarcoding, surface soil. To achieve this, a four species artificial pollen mixture was spiked into surface soils collected from Colorado, North Carolina, and Pennsylvania, and subsequently subjected to DNA extraction using both the PowerSoil and PowerSoil Pro Kits (Qiagen) with a heated incubation (either 65 °C or 90 °C). Amplification and Illumina sequencing of the internal transcribed spacer subunit 2 (ITS2) was completed in duplicate for each sample (total n, 76), and the resulting sequencing reads taxonomically identified using GenBank. The PowerSoil Pro Kit statistically outperformed the PowerSoil Kit for total DNA yield. When using either kit, incubation temperature (65 °C or 90 °C) used had no impact on the recovery of DNA, plant amplicon sequence variants (ASVs), or total plant ITS2 reads. This study highlighted that lysis of pollen in bulk environmental samples is feasible using commercially available kits, and downstream DNA metabarcoding can be used to accurately characterize pollen DNA from such sample types.
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15
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Wang WH, Lynch AM, Balko JA, Duffy DJ, Robertson JB, Posner LP. Point-of-care viscoelastic coagulation assessment in healthy dogs during the perianesthetic period. BMC Vet Res 2022; 18:346. [PMID: 36104699 PMCID: PMC9472389 DOI: 10.1186/s12917-022-03442-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 09/08/2022] [Indexed: 11/24/2022] Open
Abstract
Background The viscoelastic coagulation monitor (VCM Vet) is a novel, portable device that provides a global assessment of hemostasis. The study aims were to evaluate serial viscoelastic analysis during the perianesthetic period in healthy dogs and to compare the agreement between two VCM Vet devices. Twenty healthy dogs undergoing orthopedic surgery were enrolled. Whole blood samples were collected from an intravenous catheter at four time points: baseline, 15 min after premedication, 60 min after inhalant initiation, and 60 min after inhalant termination. Viscoelastic tests were performed in duplicate on different devices, providing: clot time (CT; seconds), clot formation time (CFT; seconds), alpha angle (α; degrees), amplitude (units) at 10 (A10) and 20 (A20) minutes post clot time, maximum clot firmness (MCF; units), and lysis index (%) at 30 (Li30) and 45 (Li45) minutes post maximum clot formation. Results One hundred sixty samples were analyzed. The speed of CT and CFT significantly decreased an average of 25.5 s (95% confidence interval [CI]15.9–35.0) and 6.9 s (95% CI 3.1–10.7) per time point, respectively. There were no significant changes in clot strength or lysis variables. The Bland–Altman style plot shows an acceptable rate of agreement for all variables with intra-class correlation ranging from 0.64–0.94. Conclusion The rate of clot formation (CT and CFT) decreased over the perianesthetic period in healthy dogs undergoing surgery. These changes were small and occurred without changes in clot strength or fibrinolysis rate, thus were not clinically relevant. There was clinically acceptable consistency between devices. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03442-x.
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16
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Butty EM, Suter SE, Chalifoux NV, Lynch AM, Mauro KD, Moyle RB, Ehrhardt CM, Robertson JB, Culler CA, Londoño LA, Vigani A, Ueda Y, Labato MA. Outcomes of nonsteroidal anti-inflammatory drug toxicosis treated with therapeutic plasma exchange in 62 dogs. J Vet Intern Med 2022; 36:1641-1647. [PMID: 35930372 PMCID: PMC9511067 DOI: 10.1111/jvim.16507] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/19/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Therapeutic plasma exchange (TPE) is gaining popularity for the management of nonsteroidal anti-inflammatory drug (NSAID) overdose in dogs. HYPOTHESIS/OBJECTIVES Describe a population of dogs treated with TPE for NSAID overdose. ANIMALS Sixty-two dogs with NSAID overdose treated with TPE. METHODS Multicenter retrospective study of dogs treated with TPE for ibuprofen, carprofen, or naproxen overdose. RESULTS The median dose of ibuprofen, carprofen or naproxen ingested was 533 mg/kg (range, 36-4857 mg/kg), 217 mg/kg (range, 88-625 mg/kg) and 138 mg/kg (range, 26-3000 mg/kg), respectively. Based on previously established toxic ranges for each NSAID, 2 (3.2%), 14 (22.6%), and 46 (74.2%) dogs ingested a gastrointestinal, renal, and neurological toxic dose, respectively. The median time between ingestion and presentation was 4 hours (range, 1-20 hours). The median number of plasma volumes processed was 1.6 (range, 0.4-2.2). The median TPE session duration was 2 hours (range, 1-4.5 hours). Circuit clotting developed during 8 (12.9%) sessions. Patient adverse events reported during 21 (33.8%) sessions consisted of urticaria (12.9%), asymptomatic hypocalcemia (9.6%), and hypotension (9.6%). The median duration of hospitalization was 2.25 days (range, 1-11 days). Sixty-one (98.4%) dogs survived to discharge, and none were rehospitalized. Thirty-one (91.1%) of the 34 dogs with at least 1 follow-up visit were not azotemic at the time of reevaluation. CONCLUSIONS AND CLINICAL IMPORTANCE This population of dogs managed with TPE had excellent outcomes, even in cases of high NSAID dose ingestion. When TPE is available and the time frame is appropriate, this extracorporeal modality should be considered for the management of NSAID overdose.
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Affiliation(s)
- Emmanuelle M Butty
- Department of Clinical Sciences, Tufts University, Cummings School of Veterinary Medicine, Foster Hospital for Small Animals, N. Grafton, Massachusetts, USA
| | - Steven E Suter
- Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - Nolan V Chalifoux
- Department of Clinical Sciences & Advanced Medicine, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, Pennsylvania, USA
| | - Alex M Lynch
- Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - Katie D Mauro
- Department of Clinical Sciences & Advanced Medicine, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, Pennsylvania, USA
| | | | - Caryn M Ehrhardt
- Department of Small Animal Clinical Sciences, University of Florida, College of Veterinary Medicine, Gainesville, Florida, USA
| | - James B Robertson
- Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, North Carolina, USA
| | | | - Leonel A Londoño
- Department of Small Animal Clinical Sciences, University of Florida, College of Veterinary Medicine, Gainesville, Florida, USA
| | - Alessio Vigani
- Clinic for Small Animal Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Yu Ueda
- Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - Mary A Labato
- Department of Clinical Sciences, Tufts University, Cummings School of Veterinary Medicine, Foster Hospital for Small Animals, N. Grafton, Massachusetts, USA
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17
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Ozawa SM, Graham JE, Guzman DSM, Tucker SM, Petritz OA, Sullivan P, Robertson JB, Hawkins MG. Clinicopathological findings in and prognostic factors for domestic rabbits with liver lobe torsion: 82 cases (2010–2020). J Am Vet Med Assoc 2022; 260:1334-1342. [DOI: 10.2460/javma.22.03.0154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
OBJECTIVE
To document clinicopathologic findings in domestic rabbits with liver lobe torsion and identify prognostic factors.
ANIMALS
82 rabbits.
PROCEDURE
Medical records of 4 institutions were reviewed to identify rabbits with an antemortem diagnosis of liver lobe torsion that were examined between 2010 and 2020.
RESULTS
The prevalence of liver lobe torsion was 0.7% (82/11,402). In all 82 rabbits, the diagnosis was made by means of abdominal ultrasonography. Fifty (60.1%) rabbits underwent liver lobectomy, 23 (28%) received medical treatment alone, and 9 (10.9%) were euthanized or died on presentation. Overall, 32 (39%) rabbits died within 7 days of initial presentation and 50 (61%) survived. Seven-day survival rate did not differ significantly between medical treatment alone and surgical treatment. However, median survival time following medical treatment (530 days) was shorter than that following surgical treatment (1,452 days). Six of 14 rabbits had evidence of systemic inflammatory disease on necropsy. Rabbits with right liver lobe torsion were less likely to survive for 7 days than were those with caudate torsions (P = 0.046; OR, 3.27; 95% CI, 1.04 to 11.3). Rabbits with moderate to severe anemia were less likely to survive for 7 days than were rabbits that were not anemic or had mild anemia (P = 0.006; OR, 4.41; 95% CI, 1.55 to 12.51). Other factors associated with a decreased 7-day survival rate were high heart rate at admission (P = 0.013) and additional days without defecation after admission (P < 0.001). Use of tramadol was associated with an increased survival rate (P = 0.018).
CLINICAL RELEVANCE
The prognosis for rabbits with liver lobe torsions was more guarded than previously described. Rabbits that underwent liver lobectomy had a longer median survival time than did rabbits that only received medical treatment.
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Affiliation(s)
- Sarah M. Ozawa
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | | | | | - Samuel M. Tucker
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Olivia A. Petritz
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | | | - James B. Robertson
- Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Michelle G. Hawkins
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA
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18
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Oda A, Wang WH, Hampton AK, Robertson JB, Posner LP. Perianesthetic mortality in English Bulldogs: a retrospective analysis in 2010 - 2017. BMC Vet Res 2022; 18:198. [PMID: 35614460 PMCID: PMC9131676 DOI: 10.1186/s12917-022-03301-9] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 05/16/2022] [Indexed: 12/03/2022] Open
Abstract
Background Many veterinarians consider English Bulldogs to have a greater perianesthetic mortality risk. The aims of this study were to 1) determine total and anesthesia-related, perianesthetic mortality (PAM) rates in English Bulldogs (EB), 2) identify potential risk factors associated with mortality in EB, and 3) determine the difference in the perianesthetic mortality rates between EB, other-brachycephalic breeds (OB), and non-brachycephalic breeds (NB). Records from EB that were anesthetized between 2010 and 2017, were investigated. OB and NB were enrolled to match with each EB based on a procedure and age from the study period. Data collected in EB included: age, ASA status, weight, procedure types, anesthetic and analgesic management, anesthetic duration, anesthetic recovery location, and cause of death. Age and cause of death were determined from OB and NB. Fisher’s exact test was used to compare PAM rate and age in EB, OB, and NB. Mann–Whitney U test was used to compare EB survivor and EB non-survivor. Logistic regression models were used to identify factors and odds ratio (OR) associated with PAM in EB. Result Two hundred twenty nine EB, 218 OB, and 229 NB were identified. The total and anesthesia-related PAM rates in EB were 6.6 and 3.9%, respectively. EB had a greater total PAM rate compared with OB (p = 0.007). ASA status was different between survivors and non-survivors in EB (p < 0.01). Risk factors identified regardless of the cause of death were premedication with full μ opioids (OR = 0.333, p = 0.114), continuous infusion of ketamine post-operatively (OR = 13.775, p = 0.013), and acepromazine administration post-operatively (OR = 7.274, p = 0.004). The most common cause of death in EB was postoperative respiratory dysfunction (87.5%). Conclusion Total and anesthesia-related mortality in EB is considerable. Most deaths in EB occurred during the postoperative period secondary to respiratory complications.
Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03301-9.
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Affiliation(s)
- Ayako Oda
- Veterinary Anesthesiology Consultant, Tokyo, Japan.
| | - Wen Hui Wang
- Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Amanda K Hampton
- Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - James B Robertson
- College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Lysa P Posner
- Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
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19
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Stewart AS, Schaaf CR, Luff JA, Freund JM, Becker TC, Tufts SR, Robertson JB, Gonzalez LM. HOPX + injury-resistant intestinal stem cells drive epithelial recovery after severe intestinal ischemia. Am J Physiol Gastrointest Liver Physiol 2021; 321:G588-G602. [PMID: 34549599 PMCID: PMC8616590 DOI: 10.1152/ajpgi.00165.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Intestinal ischemia is a life-threatening emergency with mortality rates of 50%-80% due to epithelial cell death and resultant barrier loss. Loss of the epithelial barrier occurs in conditions including intestinal volvulus and neonatal necrotizing enterocolitis. Survival depends on effective epithelial repair; crypt-based intestinal epithelial stem cells (ISCs) are the source of epithelial renewal in homeostasis and after injury. Two ISC populations have been described: 1) active ISC [aISC; highly proliferative; leucine-rich-repeat-containing G protein-coupled receptor 5 (LGR5+)-positive or sex-determining region Y-box 9 -antigen Ki67-positive (SOX9+Ki67+)] and 2) reserve ISC [rISC; less proliferative; homeodomain-only protein X positive (HOPX+)]. The contributions of these ISCs have been evaluated both in vivo and in vitro using a porcine model of mesenteric vascular occlusion to understand mechanisms that modulate ISC recovery responses following ischemic injury. In our previously published work, we observed that rISC conversion to an activated state was associated with decreased HOPX expression during in vitro recovery. In the present study, we wanted to evaluate the direct role of HOPX on cellular proliferation during recovery after injury. Our data demonstrated that during early in vivo recovery, injury-resistant HOPX+ cells maintain quiescence. Subsequent early regeneration within the intestinal crypt occurs around 2 days after injury, a period in which HOPX expression decreased. When HOPX was silenced in vitro, cellular proliferation of injured cells was promoted during recovery. This suggests that HOPX may serve a functional role in ISC-mediated regeneration after injury and could be a target to control ISC proliferation.NEW & NOTEWORTHY This paper supports that rISCs are resistant to ischemic injury and likely an important source of cellular renewal following near-complete epithelial loss. Furthermore, we have evidence that HOPX controls ISC activity state and may be a critical signaling pathway during ISC-mediated repair. Finally, we use multiple novel methods to evaluate ISCs in a translationally relevant large animal model of severe intestinal injury and provide evidence for the potential role of rISCs as therapeutic targets.
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Affiliation(s)
- Amy Stieler Stewart
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Cecilia Renee Schaaf
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Jennifer A. Luff
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - John M. Freund
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Thomas C. Becker
- 2Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, North Carolina
| | - Sara R. Tufts
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - James B. Robertson
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Liara M. Gonzalez
- 1College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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20
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Sheats MK, Burke MJ, Robertson JB, Fiebrandt KE, Fogle CA. Development and Formative Evaluation of a Low-Fidelity Equine Castration Model for Veterinary Education. Front Vet Sci 2021; 8:689243. [PMID: 34595227 PMCID: PMC8476848 DOI: 10.3389/fvets.2021.689243] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/16/2021] [Indexed: 11/13/2022] Open
Abstract
Entrustable Professional Activities (EPAs) are units of activity that early-stage professionals perform in the workplace that necessitate simultaneous integration of multiple competencies. EPA #6 requires students to perform a common surgical procedure on a stable patient, including pre-operative and post-operative management. Castration is one of the most common surgeries performed by equine primary care practitioners and is considered an "entry-level competency" for veterinary graduates entering equine private practice, however, to our knowledge there are no equine castration models available for veterinary student education. Therefore, we developed an inexpensive, low-fidelity model of equine field castration and evaluated it using a mixed-methods approach. Two different groups of students, with or without model experience, completed surveys before and after live horse castration. Students who used the model also completed model specific surveys. Videos of the students completing the model were evaluated by at least two different equine veterinary faculty using a 15-point rubric, and inter-rater reliability of the rubric was determined. After completing the model, students reflected on strengths and weaknesses of their performance. From our student survey results, we determined that student attitudes toward the model were mostly positive. Interestingly, there were several student attitudes toward the model that became significantly more favorable after live horse castration. Prior to live horse castration, there was no significant difference in confidence in model vs. no-model groups. Following live horse castration, students who used the model had higher confidence in procedure preparation and hand-ties than students who did not use the model, but they had lower scores for confidence during patient recovery. When reflecting on model castration, students most commonly cited preparation and surgical description as strengths, and ligature placement and hand-ties as weaknesses. Experts provided several suggestions to improve the model, including incorporation of emasculators and the need for better model stabilization. Our findings suggest that both students and veterinary educators feel that this low-fidelity model has educational value. Rubric performance metrics were favorable, but additional steps are needed to improve grading consistency among educators. Future research will determine whether student performance on the model is predictive of competence score during live-horse castration.
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Affiliation(s)
- M Katie Sheats
- North Carolina State University College of Veterinary Medicine, Raleigh, NC, United States
| | - Megan J Burke
- North Carolina State University College of Veterinary Medicine, Raleigh, NC, United States
| | - James B Robertson
- North Carolina State University College of Veterinary Medicine, Raleigh, NC, United States
| | - Katherine E Fiebrandt
- North Carolina State University College of Veterinary Medicine, Raleigh, NC, United States
| | - Callie A Fogle
- North Carolina State University College of Veterinary Medicine, Raleigh, NC, United States
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21
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Lai YH, Bäumer W, Meneses C, Roback DM, Robertson JB, Mishra SK, Lascelles BDX, Nolan MW. Irradiation of the Normal Murine Tongue Causes Upregulation and Activation of Transient Receptor Potential (TRP) Ion Channels. Radiat Res 2021; 196:331-344. [PMID: 34324688 DOI: 10.1667/rade-21-000103.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 07/15/2021] [Indexed: 11/03/2022]
Abstract
Signal transduction at sensory neurons occurs via transmembrane flux of cations, which is largely governed by the transient receptor potential (TRP) family of ion channels. It is unknown whether TRP channel activation contributes to the pain that accompanies radiation-induced oral mucositis. This study sought to characterize changes in TRP channel expression and function that occur in the locally irradiated tissues and afferent neurons of mice. Female CD-1 mice received singe high-dose (27 Gy) tongue irradiation, or sham irradiation. Animals were euthanized either before overt glossitis developed (days 1 and 5 postirradiation), when glossitis was severe (day 11), or after mice had recovered (days 21 and 45). Tongue irradiation caused upregulation of the Trpv1 gene in trigeminal ganglia (TG) neurons. Other TRP genes (Trpv2, Trpv4, Trpa1, Trpm8) and Gfrα3 (which acts upstream of several TRP channels) were also upregulated in TGs and/or tongue tissue, in response to radiation. Ex vivo calcium imaging experiments demonstrated that the proportions of TG neurons responding to histamine (an activator of TRPV1, TRPV4 and TRPA1), TNF-α (an activator of TRPV1, TRPV2 and TRPV4), and capsaicin (a TRPV1 agonist), were increased as early as one day after tongue irradiation; these changes persisted for at least 21 days. In a subsequent experiment, we found that genetic deletion of TRPV1 mitigated weight loss (a surrogate marker of pain severity) in mice with severe glossitis. The results intimate that various TRP channels, and TRPV1 in particular, should be explored as analgesic targets for patients experiencing pain after oral irradiation.
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Affiliation(s)
- Yen-Hao Lai
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina
| | - Wolfgang Bäumer
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina.,Institute of Pharmacology and Toxicology, Department of Veterinary Medicine, Freie Universität Berlin, Germany
| | - Constanza Meneses
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Translational Research in Pain, North Carolina State University, Raleigh, North Carolina
| | - Donald M Roback
- Department of Radiation Oncology, Rex Cancer Center, Raleigh, North Carolina
| | - James B Robertson
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Santosh K Mishra
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina.,Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Pain Research and Education Center, North Carolina State University, Raleigh, North Carolina
| | - B Duncan X Lascelles
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina.,Translational Research in Pain, North Carolina State University, Raleigh, North Carolina.,Comparative Pain Research and Education Center, North Carolina State University, Raleigh, North Carolina
| | - Michael W Nolan
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina.,Comparative Pain Research and Education Center, North Carolina State University, Raleigh, North Carolina
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22
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Enomoto M, Lascelles BDX, Robertson JB, Gruen ME. Refinement of the Feline Musculoskeletal Pain Index (FMPI) and development of the short-form FMPI. J Feline Med Surg 2021. [PMID: 34002643 DOI: 10.1177/1098612x211011984.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the reliability and responsiveness of the Feline Musculoskeletal Pain Index (FMPI) using the collective results of multiple clinical studies and iteratively refine the FMPI for future use. METHODS Data were compiled from previously conducted studies involving client-owned cats with degenerative joint disease (DJD) and which used the FMPI. The reliability of the FMPI was assessed using the data from the initial visits of those studies. For the assessment of responsiveness of the FMPI, only placebo-controlled studies that used analgesic treatments were included. Treatment groups from each study were combined and categorized as 'placebo' group and 'analgesic' group. Then, the mean change from baseline in score of each FMPI item and across all items within and between these groups were assessed. Based on the results of the reliability and responsiveness of the FMPI, stepwise elimination was used to remove the items that were least able to distinguish between the placebo and analgesic groups. Finally, after the stepwise elimination, a proposed new FMPI-short form (FMPI-sf) was constructed and its reliability was reassessed using the data sets described above. Individual and combined data sets of the studies were also used to compare the responsiveness of the original FMPI and the FMPI-sf. RESULTS The data from 180 cats from four studies were included. The original FMPI had a reasonable reliability, but low/no responsiveness. The elimination process of FMPI items refined the responsiveness of the instrument while maintaining its reliability. When the responsiveness was compared between the original FMPI (17 items) and the FMPI-sf (nine items), the treatment effect between groups was always greater when the FMPI-sf was used. CONCLUSIONS AND RELEVANCE The proposed FMPI-sf may be able to better distinguish between placebo and analgesic effects in cats with DJD.
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Affiliation(s)
- Masataka Enomoto
- Translational Research in Pain (TRiP) Program, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - B Duncan X Lascelles
- Translational Research in Pain (TRiP) Program, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Center for Translational Pain Research, Department of Anaesthesiology, Duke University, Durham, NC, USA
| | - James B Robertson
- Biostatistician, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Margaret E Gruen
- Comparative Pain Research and Education Centre, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Comparative Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Behavioral Medicine, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
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23
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Enomoto M, Lascelles BDX, Robertson JB, Gruen ME. Refinement of the Feline Musculoskeletal Pain Index (FMPI) and development of the short-form FMPI. J Feline Med Surg 2021; 24:142-151. [PMID: 34002643 DOI: 10.1177/1098612x211011984] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the reliability and responsiveness of the Feline Musculoskeletal Pain Index (FMPI) using the collective results of multiple clinical studies and iteratively refine the FMPI for future use. METHODS Data were compiled from previously conducted studies involving client-owned cats with degenerative joint disease (DJD) and which used the FMPI. The reliability of the FMPI was assessed using the data from the initial visits of those studies. For the assessment of responsiveness of the FMPI, only placebo-controlled studies that used analgesic treatments were included. Treatment groups from each study were combined and categorized as 'placebo' group and 'analgesic' group. Then, the mean change from baseline in score of each FMPI item and across all items within and between these groups were assessed. Based on the results of the reliability and responsiveness of the FMPI, stepwise elimination was used to remove the items that were least able to distinguish between the placebo and analgesic groups. Finally, after the stepwise elimination, a proposed new FMPI-short form (FMPI-sf) was constructed and its reliability was reassessed using the data sets described above. Individual and combined data sets of the studies were also used to compare the responsiveness of the original FMPI and the FMPI-sf. RESULTS The data from 180 cats from four studies were included. The original FMPI had a reasonable reliability, but low/no responsiveness. The elimination process of FMPI items refined the responsiveness of the instrument while maintaining its reliability. When the responsiveness was compared between the original FMPI (17 items) and the FMPI-sf (nine items), the treatment effect between groups was always greater when the FMPI-sf was used. CONCLUSIONS AND RELEVANCE The proposed FMPI-sf may be able to better distinguish between placebo and analgesic effects in cats with DJD.
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Affiliation(s)
- Masataka Enomoto
- Translational Research in Pain (TRiP) Program, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - B Duncan X Lascelles
- Translational Research in Pain (TRiP) Program, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Center for Translational Pain Research, Department of Anaesthesiology, Duke University, Durham, NC, USA
| | - James B Robertson
- Biostatistician, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Margaret E Gruen
- Comparative Pain Research and Education Centre, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Comparative Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Behavioral Medicine, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
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24
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Chia H, Taney K, Hoover D, Robertson JB, Villamizar-Martinez LA. Localization of the First Mandibular Molar Roots in Relationship to the Mandibular Canal in Small Breed Dogs-A Tomography Imaging Study. Front Vet Sci 2021; 8:684763. [PMID: 34055960 PMCID: PMC8149890 DOI: 10.3389/fvets.2021.684763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/23/2021] [Accepted: 04/19/2021] [Indexed: 11/13/2022] Open
Abstract
The intimate relationship between the mandibular canal (MC) and the first mandibular molar tooth presents challenges when performing dentoalveolar surgical procedures due to the probability of causing iatrogenic injury to the inferior alveolar neurovascular bundle. Superimposition between the MC and the first molar (M1) tooth roots is often observed on intraoral dental radiographs in small breed dogs. However, due to the radiograph's bidimensional nature, it is impossible to determine the buccal or lingual localization of the first molar roots with respect to the MC. Thus, this study's objective was to determine the localization of the first molar tooth's roots in relation to the position of the MC and their overlapping percentage with the canal in small-bodyweight dogs (<15 kg) using tomographic diagnostic images. For this, cone-beam computed tomography and high-definition computed tomography exams from 103 small breed dogs (under 15 kg) were retrospectively assessed to determine the lingual or buccal localization of the first molar tooth's roots with respect to the MC and the degree of overlap of the roots with the canal. In conclusion, most of the roots of M1 of dogs under 15 kg were located at the MC's lingual aspect (82.7%) with an overall superimposition median with the MC of 100 and 90% for the mesial and distal roots, respectively. Straddle tooth roots were not a common anatomical presentation in the dogs of this study.
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Affiliation(s)
- Han Chia
- Center for Veterinary Dentistry and Oral Surgery, Gaithersburg, MD, United States
| | - Kendall Taney
- Center for Veterinary Dentistry and Oral Surgery, Gaithersburg, MD, United States
| | - Don Hoover
- Veterinary Dental Clinic of North Carolina, Durham, NC, United States
| | - James B Robertson
- Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Lenin A Villamizar-Martinez
- Dentistry and Oral Surgery Service, Department of Clinical Science, North Carolina State University, Raleigh, NC, United States
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25
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Love LC, Hedgpeth MW, Robertson JB, Marks SL, Schoenfeld-Tacher RM. Assessment of Safety Culture at a Veterinary Teaching Hospital in the United States. Front Vet Sci 2021; 8:638764. [PMID: 33791353 PMCID: PMC8005538 DOI: 10.3389/fvets.2021.638764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/07/2020] [Accepted: 02/10/2021] [Indexed: 12/04/2022] Open
Abstract
This study assessed the fidelity of an existing questionnaire regarding attitudes toward safety culture in an academic veterinary hospital setting and gathered baseline data on these attitudes in a local population. A cross-sectional study design was used to evaluate perceptions held by veterinary teaching hospital employees. An established veterinary safety culture survey was modified and administered as a confidential online survey to faculty, house officers, and professional staff of a veterinary teaching hospital in the United States. Confirmatory and exploratory factor analysis were conducted to compare the adapted survey to the established version. Descriptive statistics were used to characterize baseline safety culture. The adapted survey exhibited factor groupings that were mostly in agreement with, but slightly different from, the original instrument. In general, survey respondents outlined positive attitudes toward the various domains of safety culture, though we identified opportunities for improvement in some areas. An adapted veterinary safety culture survey can be applied to a veterinary teaching hospital in the United States to assess baseline data surrounding the culture of safety and to identify opportunities for focused improvement efforts.
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Affiliation(s)
- Lydia C Love
- Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, NC State University, Raleigh, NC, United States
| | - Mari-Wells Hedgpeth
- Department of Clinical Sciences, College of Veterinary Medicine, NC State University, Raleigh, NC, United States
| | - James B Robertson
- Office of Research, College of Veterinary Medicine, NC State University, Raleigh, NC, United States
| | - Steven L Marks
- Department of Clinical Sciences, College of Veterinary Medicine, NC State University, Raleigh, NC, United States
| | - Regina M Schoenfeld-Tacher
- Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, NC State University, Raleigh, NC, United States
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26
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Woelfel CW, Robertson JB, Mariani CL, Muñana KR, Early PJ, Olby NJ. Outcomes and prognostic indicators in 59 paraplegic medium to large breed dogs with extensive epidural hemorrhage secondary to thoracolumbar disc extrusion. Vet Surg 2021; 50:527-536. [PMID: 33606895 DOI: 10.1111/vsu.13592] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/03/2020] [Accepted: 12/21/2020] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate outcomes and prognostic factors after decompressive hemilaminectomy in paraplegic medium to large breed dogs with extensive epidural hemorrhage (DEEH) and thoracolumbar intervertebral disc extrusion (TL-IVDE). STUDY DESIGN Retrospective, cohort, descriptive study. ANIMALS Fifty-nine client-owned dogs. METHODS Medical records and advanced imaging were reviewed for paraplegic dogs with DEEH. Ambulatory status 6 months after surgery and postoperative complications were recorded. Multiple logistic regression models were constructed to explore prognostic factors. RESULTS Records of 22 dogs with and 37 dogs without pelvic limb pain perception at presentation were included. Median age of dogs was 5 years (interquartile range, 4-7), and mean weight was 26.9 kg (SD, ±9.71). Labradors and Labrador mixes were most common (17/59 [28.8%]). Recovery of ambulation occurred in 17 of 22 (77.3%) dogs with and in 14 of 37 (37.8%) dogs without pain perception prior to surgery. Progressive myelomalacia was recorded in three of 59 (5.1%) dogs, one with pain perception and two without pain perception at presentation. Postoperative complications (14/59 [23.7%]) were common. Factors independently associated with outcome included clinical severity (odds ratio [OR] 0.179, P = .005), number of vertebrae with signal interruption in half Fourier single-shot turbo spin-echo sequences (HASTEi; OR, 0.738; P = .035), and ratio of vertebral sites decompressed to HASTEi (OR, 53.79; P = .03). CONCLUSION Paraplegic medium to large breed dogs with DEEH have a less favorable outcome after surgical decompression than paraplegic dogs with TL-IVDE. CLINICAL SIGNIFICANCE Dogs with DEEH can have severe postoperative complications. Loss of pain perception and increased HASTEi are associated with a poor outcome, while more extensive decompression improves outcome.
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Affiliation(s)
- Christian W Woelfel
- North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina
| | - James B Robertson
- North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina
| | - Chris L Mariani
- North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina
| | - Karen R Muñana
- North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina
| | - Peter J Early
- North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina
| | - Natasha J Olby
- North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina
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27
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Graham AM, Tefft KM, Stowe DM, Jacob ME, Robertson JB, Hawkins EC. Factors associated with clinical interpretation of tracheal wash fluid from dogs with respiratory disease: 281 cases (2012-2017). J Vet Intern Med 2021; 35:1073-1079. [PMID: 33544404 PMCID: PMC7995441 DOI: 10.1111/jvim.16052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 01/07/2023] Open
Abstract
Background Clinicians face several dilemmas regarding tracheal washes (TWs) for the diagnosis of respiratory disease, including method and prediction of bacterial growth from cytology results. Objective To compare cytology and culture of endotracheal and transtracheal washes and identify factors associated with discordancy and bacterial growth. Animals Two hundred forty‐five dogs with respiratory disease. Methods Retrospective study. Tracheal wash submissions were included if cellularity was sufficient for cytologic interpretation and aerobic cultures were performed. Collection technique, cytology, bacterial growth, and antibiotic history were analyzed. Results Fewer transtracheal specimens (9/144, 6.3%) were excluded for hypocellularity than endotracheal (28/174, 16.1%); otherwise, results were similar and were combined. Of 281 specimens with cellularity sufficient for interpretation, 97 (34.5%) had bacteria on cytology and 191 (68.0%) had bacterial growth. Cytology positive/culture negative discordancy was uncommon (8/97, 8%). Cytology negative/culture positive discordancy was frequent (102/184, 55.4%), but occurred less often (28/184, 14.2%) when only 1+ growth or greater was considered positive. Oropharyngeal contamination was associated with bacterial growth, but not discordancy. No association was found between antibiotic administration and bacterial growth. Conclusions and Clinical Importance Endotracheal wash fluid, in particular, should be screened for gross mucus or turbidity to maximize the likelihood of an adequate specimen. Otherwise, endotracheal and transtracheal specimens were similar. Presence of bacteria on cytology was a good predictor of any growth, while their absence was a good predictor of the absence of growth of 1+ or more. Recent antibiotic usage should not discourage TW culture if there is compelling reason to avoid delay.
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Affiliation(s)
- Amber M Graham
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Karen M Tefft
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Devorah M Stowe
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Megan E Jacob
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - James B Robertson
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Eleanor C Hawkins
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
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28
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Berglund AK, Long JM, Robertson JB, Schnabel LV. TGF-β2 Reduces the Cell-Mediated Immunogenicity of Equine MHC-Mismatched Bone Marrow-Derived Mesenchymal Stem Cells Without Altering Immunomodulatory Properties. Front Cell Dev Biol 2021; 9:628382. [PMID: 33614658 PMCID: PMC7889809 DOI: 10.3389/fcell.2021.628382] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/11/2020] [Accepted: 01/11/2021] [Indexed: 12/17/2022] Open
Abstract
Allogeneic mesenchymal stem cells (MSCs) are a promising cell therapy for treating numerous diseases, but major histocompatibility complex (MHC)-mismatched MSCs can be rejected by the recipient’s immune system. Pre-treating MSCs with transforming growth factor-β2 (TGF-β2) to downregulate surface expression of MHC molecules may enhance the ability of allogeneic MSCs to evade immune responses. We used lymphocyte proliferation assays and ELISAs to analyze the immunomodulatory potential of TGF-β2-treated equine bone marrow-derived MSCs. T cell activation and cytotoxicity assays were then used to measure the in vitro cell-mediated immunogenicity. Similar to untreated MSCs, TGF-β2-treated MSCs inhibited T cell proliferation and did not stimulate MHC-mismatched T cells to proliferate. Additionally, similar quantities of prostaglandin E2 and TGF-β1 were detected in assays with untreated and TGF-β2-treated MSCs supporting that TGF-β2-treated MSCs retain their strong immunomodulatory properties in vitro. Compared to untreated MSCs, TGF-β2-treated MSCs induced less T cell activation and had reduced cell-mediated cytotoxicity in vitro. These results indicate that treating MSCs with TGF-β2 is a promising strategy to reduce the cell-mediated immunogenicity of MHC-mismatched MSCs and facilitate allogeneic MSC therapy.
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Affiliation(s)
- Alix K Berglund
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States.,Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States
| | - Julie M Long
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - James B Robertson
- Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Lauren V Schnabel
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States.,Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States
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29
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LaQuaglia KA, Robertson JB, Lunn KF. Neutropenia in dogs receiving vincristine for treatment of presumptive immune-mediated thrombocytopenia. J Vet Intern Med 2021; 35:226-233. [PMID: 33421218 PMCID: PMC7848356 DOI: 10.1111/jvim.16029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/10/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Neutropenia is an adverse effect of vincristine when used in multidrug chemotherapy protocols. OBJECTIVE To determine the incidence of neutropenia, identify potential risk factors for neutropenia, and determine the effect of neutropenia on outcome, in dogs receiving vincristine for treatment of immune-mediated thrombocytopenia (ITP). ANIMALS One hundred twenty-seven client-owned dogs presumptively diagnosed with ITP. METHODS In this retrospective cohort study, medical records were reviewed to identify dogs presumptively diagnosed with ITP, and treated with vincristine, over a 15-year period. Logistic regression was used to identify risk factors for the development of neutropenia in dogs receiving vincristine. Time to platelet count ≥40 000 platelets/μL, survival, and duration of hospitalization were compared between neutropenic and non-neutropenic dogs. RESULTS Vincristine was administered to 127 dogs with presumptive ITP; 19 became neutropenic. Administration of cyclosporine was significantly (P < .001) associated with the development of neutropenia (odds ratio: 12.97, 95% confidence interval: 4.17, 40.35). There was no difference in median time to ≥40 000 platelets/μL between neutropenic dogs (4 days; range, 1-14 days) and non-neutropenic dogs (3 days; range, 0-48 days). Percentage survival to discharge was 95% in both groups, but median duration of hospitalization was significantly longer in neutropenic dogs (6 days; range, 3-22 days) compared to non-neutropenic dogs (4 days; range, 2-15 days). CONCLUSIONS AND CLINICAL IMPORTANCE Cyclosporine administration was associated with the development of neutropenia in dogs receiving vincristine, which might be related to effects on metabolism of vincristine. Neutrophil counts should be monitored in dogs receiving vincristine treatment for ITP, particularly if administered in conjunction with cyclosporine.
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Affiliation(s)
- Kathryn A LaQuaglia
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - James B Robertson
- College of Veterinary Medicine, North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - Katharine F Lunn
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina, USA
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30
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Price ML, Lai YHE, Marcus KL, Robertson JB, Lascelles BDX, Nolan MW. Early radiation-induced oral pain signaling responses are reduced with pentoxifylline treatment. Vet Radiol Ultrasound 2020; 62:255-263. [PMID: 33350542 DOI: 10.1111/vru.12943] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 11/02/2020] [Accepted: 11/02/2020] [Indexed: 12/29/2022] Open
Abstract
Radiation-induced acute oral mucositis is associated with inflammation and pain. In other realms of pain research, nociceptors are known to be activated by inflammatory cytokines; for example, tumor necrosis factor alpha (TNF-α) can activate transient receptor potential ion channels on sensory neurons. But there is an unclear relationship between inflammatory cytokines and molecular mediators of pain in radiation-induced mucositis (RIM) and radiation-associated pain (RAP). In this prospective, analytical, experimental pilot study, a common drug (pentoxifylline [PTX]) was used with the goal of inhibiting TNF-α signaling in mice that underwent lingual irradiation to induce severe acute oral RIM/RAP. Body weight and glossitis scores were recorded daily. Eye wiping behaviors were assayed as a surrogate measure of oral discomfort (which is possible due to cross-sensitization of the mandibular and ophthalmic branches of the trigeminal nerve). Quantitative real-time reverse transcription polymerase chain reaction was performed on irradiated tongue tissue to measure changes in expression of TNF-α, its receptor, nuclear factor kappa-light-chain-enhancer of activated B cells, transient receptor potential vanilloid type 1 (TRPV1), and transient receptor potential vanilloid type 4 (TRPV4). Responsiveness of afferent sensory trigeminal neurons to TNF-α, a TRPV1 agonist (capsaicin), and a partial TRPV4 agonist (histamine) was measured via calcium imaging. Although PTX treatment did not reduce glossitis severity or mitigate weight loss in mice with RIM/RAP, it did inhibit the upregulation of TNF-α's receptor that normally accompanies RIM, and it also reduced neuronal responsiveness to each of the aforementioned chemical stimuli. These results provide provisional evidence that inhibition of TNF-α signaling with PTX treatment may serve as a useful tool for reducing pain in head and neck cancer patients.
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Affiliation(s)
- Mikayla L Price
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina
| | - Yen-Hao Erik Lai
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina
| | - Karen L Marcus
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina
| | - James B Robertson
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - B Duncan X Lascelles
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina.,Comparative Pain Research and Education Center, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Michael W Nolan
- Department of Clinical Sciences, North Carolina State University, Raleigh, North Carolina.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina.,Comparative Pain Research and Education Center, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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Villamizar-Martinez LA, Chia H, Robertson JB, Villegas CM, Reiter AM. Comparison of unilateral rostral, middle and caudal segmental mandibulectomies as an alternative treatment for unilateral temporomandibular joint ankylosis in cats: an ex vivo study. J Feline Med Surg 2020; 23:783-793. [PMID: 33289444 DOI: 10.1177/1098612x20977134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/15/2022]
Abstract
OBJECTIVES Temporomandibular joint ankylosis (TMJA) is the partial or complete inability to open the mouth due to intra- or extra-articular fibrous, bony or fibro-osseous tissue proliferation. Surgical procedures such as gap arthroplasty, condylectomy or wide extra-articular osteotomy have been recommended to treat this condition; these techniques are challenging, time-consuming and have been occasionally associated with postoperative recurrence, severe periarticular neurovascular iatrogenic trauma and death. Segmental mandibulectomy had previously been recommended as an alternative option for unilateral TMJA, but the location of mandibulectomy and extent of bone removal from the mandible region have not been mentioned in the literature. This study aimed to validate the area of the mandibular body (rostral, middle or caudal) and amount of bony tissue that should be osteotomized during a segmental mandibulectomy for treatment of unilateral TMJA in cats. METHODS In this block study, 30 cadaver heads of domestic shorthair cats were randomly divided into three groups of 10 specimens each based on the mandibular region that would undergo segmental mandibulectomy (rostral, middle and caudal). The size of the removed mandibular segment and pre- and postoperative vertical range of mandibular motion were compared for statistical purposes. RESULTS A significant statistical difference was observed between the pre- and postoperative vertical range of mandibular motion between the rostral, middle and caudal segmental mandibulectomies (P <0.001). The mean postoperative recovered range of mandibular motion for the rostral, middle and caudal segmental mandibulectomies was 50.4%, 81.9% and 90.4%, respectively. CONCLUSIONS AND RELEVANCE The caudal segmental mandibulectomy showed the highest postoperative vertical range of mandibular motion. The removal of a minimum of 1.2 cm of the caudal mandibular body was required to achieve nearly full recovery of presurgical mouth opening in the specimens of this study. The caudal segmental mandibulectomy may eliminate the risk of iatrogenic periarticular neurovascular damage inherent to more invasive surgeries performed at the temporomandibular joint area. When performed unilaterally, the caudal segmental mandibulectomy is a viable surgical alternative that may show a similar outcome to other surgical techniques.
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Affiliation(s)
- Lenin A Villamizar-Martinez
- Dentistry and Oral Surgery Service, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Han Chia
- Center for Veterinary Dentistry & Oral Surgery, Gaithersburg, MD, USA
| | - James B Robertson
- Office of Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Cristian M Villegas
- Department of Exact Sciences, College of Agriculture Luiz de Queiroz, University of São Paulo, SP, Brazil
| | - Alexander M Reiter
- Dentistry and Oral Surgery Service, Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Gruen M, Case BC, Robertson JB, Campbell S, Korpivaara ME. Evaluation of repeated dosing of a dexmedetomidine oromucosal gel for treatment of noise aversion in dogs over a series of noise events. Vet Rec 2020; 187:489. [PMID: 32994360 PMCID: PMC7848045 DOI: 10.1136/vr.106046] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/10/2020] [Accepted: 08/25/2020] [Indexed: 11/28/2022]
Abstract
Background Noise aversion is a common behavioural disorder in dogs; affected dogs show fear behaviours in response to noise stimuli. Pharmacological treatment is effective for many dogs; clinical reports suggest anxiolytic treatment lowers the need for treatment over time. We aimed to evaluate the effect of dexmedetomidine oromucosal gel for dogs with noise aversion over a series of noise events. Furthermore, we evaluated burden of care for owners of dogs with noise aversion via questionnaire. Methods Owners of enrolled dogs completed records for 10 noise events indicating whether their dog received dexmedetomidine gel and pretreatment and post-treatment anxiety scores; adverse events were noted. Owners were queried about burden of care. Results Twenty-two client-owned dogs completed recordings for 10 events. Logistic regression results showed a significant effect for time of event with decreased probability of receiving treatment for subsequent events (OR=0.75, P=0.0017). Within an event, significant improvement in anxiety was seen (median improvement 11 points; paired Wilcoxon; P<0.0001). We found overall burden of care was manageable, yet many owners agreed with statements regarding frustration (42 per cent), stress (46 per cent), guilt (42 per cent) and sadness (75 per cent) about their dog’s condition. Conclusions Repeated use of dexmedetomidine gel for noise events resulted in decreased need for administration. Burden of care is important to discuss with clients.
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Affiliation(s)
- Margaret Gruen
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - Beth C Case
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - James B Robertson
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - Sharon Campbell
- Veterinary Specialty Operations, Zoetis Inc, Florham Park, New Jersey, USA
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Zibura AE, Robertson JB, Westermeyer HD. Gonioscopic iridocorneal angle morphology and incidence of postoperative ocular hypertension and glaucoma in dogs following cataract surgery. Vet Ophthalmol 2020; 24 Suppl 1:50-62. [PMID: 32649053 DOI: 10.1111/vop.12802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 02/14/2020] [Revised: 06/04/2020] [Accepted: 06/10/2020] [Indexed: 11/27/2022]
Abstract
PURPOSE To investigate the relationship between gonioscopic iridocorneal angle (ICA) morphology and the incidence of postoperative ocular hypertension (POH) and postoperative glaucoma in dogs undergoing cataract surgery. ANIMALS STUDIED Retrospective analysis of 138 eyes of 78 canine patients who underwent phacoemulsification at North Carolina State University from December 1, 2015 through April 30, 2017. METHODS Medical records of all phacoemulsification patients with preoperative RetCam gonioscopic images were reviewed for preoperative, intraoperative, and postoperative variables. Gonioscopic angle indices were calculated using a novel (ZibWest) angle grading system, and these indices were analyzed for outcome-related significance. RESULTS Increased surgeon experience was associated with increased probability of POH and vision loss. Higher average ZibWest Angle indices (ie, more open angles with less pectinate ligament dysplasia/ abnormality) were associated with a significantly decreased probability of medically unresponsive glaucoma. Increased patient age was significantly associated with an increased probability of both postoperative glaucoma and vision loss. Female dogs were significantly more likely to experience postoperative glaucoma compared to male dogs. Increased surgery time was significantly associated with increased probability of vision loss. CONCLUSIONS The ZibWest angle index may predict increased risk for developing medically unresponsive glaucoma with cataract surgery. Female sex, and increased patient age, surgical time, and surgeon experience were associated with increased postoperative morbidity.
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Affiliation(s)
- Ashley E Zibura
- Comparative Ophthalmology, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - James B Robertson
- Department of Veterinary Research, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Hans D Westermeyer
- Comparative Ophthalmology, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
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Hedgespeth BA, Stauffer SH, Robertson JB, Gookin JL. Association of fecal sample collection technique and treatment history with Tritrichomonas foetus polymerase chain reaction test results in 1717 cats. J Vet Intern Med 2020; 34:734-741. [PMID: 32039505 PMCID: PMC7096610 DOI: 10.1111/jvim.15727] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 01/31/2020] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Fecal polymerase chain reaction (PCR) testing for Tritrichomonas foetus is considered the most sensitive means for diagnosis of infection but results could be influenced by fecal collection technique and prior use of antimicrobial drugs. OBJECTIVES To establish any association between fecal collection technique or treatment history and results of fecal PCR testing for T. foetus. ANIMALS Fecal samples from 1717 cats submitted by veterinarians between January 2012 and December 2017. METHODS This study used a retrospective analysis. T. foetus PCR test results from 1808 fecal samples submitted for diagnostic testing were examined for their association with method of fecal collection and prior antimicrobial treatments. Data were collected from sample submission form. RESULTS Positive T. foetus PCR test results were obtained for 274 (16%) cats. Fecal samples collected via fecal loop had increased probability of positive PCR test results (odds ratio [OR] 2.04, 95% confidence interval [CI] 1.31-3.17, P = .002) compared to samples collected by colonic flush. There was no association between PCR test results and treatment history, treatment type, or prior treatment with ronidazole. After an initial positive PCR test, 4/19 (21%; 95% CI 2.7%-39.4%) cats treated with ronidazole had a second positive test result. CONCLUSIONS AND CLINICAL IMPORTANCE Results of this study support that fecal samples collected by loop might be better for PCR diagnosis of T. foetus infection. Lack of association of ronidazole with PCR test results and a 21% all-potential-causes failure rate of ronidazole in cats with preconfirmed infection are important limitations to use of this drug.
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Affiliation(s)
- Barry A. Hedgespeth
- Department of Clinical SciencesNorth Carolina State UniversityRaleighNorth Carolina
| | - Stephen H. Stauffer
- Department of Clinical SciencesNorth Carolina State UniversityRaleighNorth Carolina
| | - James B. Robertson
- College of Veterinary MedicineNorth Carolina State UniversityRaleighNorth Carolina
| | - Jody L. Gookin
- Department of Clinical SciencesNorth Carolina State UniversityRaleighNorth Carolina
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35
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Varo P, Laine R, Koivistoinen P, Asp NG, Menger A, Reimann S, Robertson JB, Schweizer TF, Selvendran RR, Siljestrom M, Southgate DAT, Theander O, Soest PJV, Westerlund E. Effect of Heat Treatment on Dietary Fiber: Interlaboratory Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/66.4.933] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
The effects of thermal treatments on the dietary fiber composition of cereal and potato samples were studied at 8 laboratories using different analytical methods. Thermal treatments included extrusion cooking for cereals, and boiling and frying for potatoes. No changes in the amounts of dietary fiber or starch were observed in the extruded samples. Heat-treated potato samples contained significantly more water-insoluble dietary fiber (cellulose) and less starch than did raw potato. However, this may be due, at least in part, to the sample preparation procedure rather than the heat treatment alone. The study indicates that gravimetric and sequential hydrolysis methods give similar results, but the variation in most cases is still wide. Further standardization of methods is evidently needed, especially if legislative measures for setting limits on the fiber content of foods are to be introduced. Standardization of starch analysis should also be of primary importance in future work on carbohydrate methodology. This can be concluded from the variation in results concerning this extremely important food constituent. It should be noted that the sample matrix in the present study was simpler than that of complex meals or diets.
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Affiliation(s)
- Perth Varo
- University of Helsinki, Department of Food Chemistry and Technology, SF-00710 Helsinki, Mand
| | - Raili Laine
- University of Helsinki, Department of Food Chemistry and Technology, SF-00710 Helsinki, Mand
| | - Pekka Koivistoinen
- University of Helsinki, Department of Food Chemistry and Technology, SF-00710 Helsinki, Mand
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Abstract
Let X1, X2, · ··, Xn be positive i.i.d. random variables with known distribution function having a finite mean. For a given s ≥0 we define Nn = N(n, s) to be the largest number k such that the sum of the smallest k Xs does not exceed s, and Mn = M(n, s) to be the largest number k such that the sum of the largest k X's does not exceed s. This paper studies the precise and asymptotic behaviour of E(Nn), E(Mn), Nn, Mn, and the corresponding ‘stopped' order statistics and as n →∞, both for fixed s, and where s =sn is an increasing function of n.
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Dicello JF, Gersey BB, Gridley DS, Coutrakon GB, Lesyna D, Pisacane VL, Robertson JB, Schulte RW, Slater JD, Wroe AJ, Slater JM. Microdosimetric comparison of scanned and conventional proton beams used in radiation therapy. Radiat Prot Dosimetry 2011; 143:513-518. [PMID: 21362697 DOI: 10.1093/rpd/ncq513] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Multiple groups have hypothesised that the use of scanning beams in proton therapy will reduce the neutron component of secondary radiation in comparison with conventional methods with a corresponding reduction in risks of radiation-induced cancers. Loma Linda University Medical Center (LLUMC) has had FDA marketing clearance for scanning beams since 1988 and an experimental scanning beam has been available at the LLUMC proton facility since 2001. The facility has a dedicated research room with a scanning beam and fast switching that allows its use during patient treatments. Dosimetric measurements and microdosimetric distributions for a scanned beam are presented and compared with beams produced with the conventional methods presently used in proton therapy.
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Affiliation(s)
- John F Dicello
- Department of Radiation Medicine, Loma Linda University Medical Center, 25 Westminster Bridge Way, Timonium, MD, USA.
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Abstract
Light-emitting diodes (LEDs) are becoming more commonly used as light sources for fluorescence microscopy. We describe the adaptation of a commercially available light-emitting diode flashlight for use as a source for fluorescence excitation. This light source is long-lived, inexpensive and is effective for excitation in the range of 440-600 nm.
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Affiliation(s)
- J B Robertson
- Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA
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Lin VK, Robertson JB, Lee IL, Zimmern PE, McConnell JD. Smooth muscle myosin heavy chains are developmentally regulated in the rabbit bladder. J Urol 2000; 164:1376-80. [PMID: 10992418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
PURPOSE In smooth muscle (SM), myosin heavy chain (MHC) is expressed predominantly as two isoforms, SM1 and SM2, which are encoded by a single gene and expressed by alternative splicing mechanisms. Although functional differences of these isoforms are unknown, changes in SM1/SM2 ratio have been reported in various pathophysiologic conditions. We analyzed MHC composition of bladder detrusor SM from rabbits of different ages to determine whether SM1 and SM2 isoform expressions are developmentally regulated. MATERIALS AND METHODS Rabbit bladders on the -11, -4, 1, 7, 14, 21, and 90th days of life were analyzed for SM MHC isoform expression at protein and mRNA levels. Porous sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), S1 protection assay, and histological analysis were employed. RESULTS The predominant MHC isoform in fetal and neonatal bladders was SM1. In the third postnatal week, the SM1/SM2 ratio decreased from 2.3 to 1.0. A stable SM1/SM2 ratio of 0.6 was observed in the adult animal. Although expression of SM1 mRNA was 2.6-fold greater than that of SM2 in the fetus, the relative amount of SM2 mRNA increased rapidly after birth and remained the predominant isoform throughout adult life. Developmental changes in relative amounts of SM1 and SM2 protein in bladder tissues were virtually identical to those of SM1 and SM2 mRNA. SM cell growth and disappearance of primitive mesenchyme from the bladder occurred concomitantly with the MHC isoform shift. CONCLUSIONS The parallel temporal course of MHC mRNA and protein isoform levels suggests detrusor SM MHC expression may be developmentally regulated at the mRNA level.
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Affiliation(s)
- V K Lin
- Department of Urology, The University of Texas Southwestern Medical Center, Dallas, Texas 75390-9110, USA
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Zimmerer EJ, Carneal J, Robertson JB, Ozturk M, Cardiff S, Luo M. Genome organization and phylogenetic distribution of a novel family of ancient murine endogenous proviruses with evidence for transposition-mediated proliferation. Biochem Genet 2000; 38:253-65. [PMID: 11131339 DOI: 10.1023/a:1002075821782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A new family of murine endogenous proviruses (VL6.0) is described here. The intact provirus is near 6 kb in length and shows a genomic organization of 5' LTR, gag, pol, env, and 3' LTR. The primer binding site (PBS) is that of a tRNA(gly). The lack of functional open reading frames and occurrence of significant gaps in most, if not all, members of this group show it to be ancient. Our estimate of copy number per haploid genome is 30+. Members of this group have been isolated from Mus musculus domesticus, M. m. casteneus, M. m. hortulanus, M. caroli, and M. spretus. The occurrence of these sequences throughout such diverse members of the genus Mus may indicate that the date of the original infection predated the divergence of the extant Mus lineages at around 2.5 million years ago. Analysis of gap (deletion/insertion) patterns indicates that these sequences may have proliferated within the Mus genome by a mechanism of reverse transcriptase-mediated transposition. As yet, there are no closely related murine retroviruses described. The closest mammalian retrovirus based on sequence similarity is from the miniature swine (Sus scrofa).
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Affiliation(s)
- E J Zimmerer
- Department of Biological Sciences, Murray State University, Murray, Kentucky 42071, USA.
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Robertson JB, Edberg SC. Natural protection of spring and well drinking water against surface microbial contamination. I. Hydrogeological parameters. Crit Rev Microbiol 1997; 23:143-78. [PMID: 9226112 DOI: 10.3109/10408419709115134] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [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: 02/04/2023]
Abstract
The fate and transport of microbes in groundwater are controlled by physicochemical characteristics of the microbe and of the groundwater/aquifer media. Key characteristics of the microbe include size, inactivation (die-off) rate, and surface electrostatic properties. Key properties of the groundwater/aquifer system include flow velocity, aquifer grain (or pore) size, porosity, solid organic carbon content, temperature, pH, and other chemical characteristics of water and mineral composition. Because of size and surface electrical properties, viruses are much more mobile in groundwater than Cryptosporidium and Giardia (which are about 100 times or more larger than viruses). The inactivation or die-off rate is usually the most important factor governing how far microbes can migrate in significant numbers in groundwater. Typical half-lives of microbes in groundwater range from a few hours to a few weeks. Examples of maximum reported migration distances of microbes in groundwater include: bacteria, 600 m in a sandy aquifer: viruses, 1000 to 1600 m in channeled limestones and 250 to 408 m in glacial silt-sand aquifers; Cryptosporidium and Giardia, no confirmed reports found of significant migration distances. Investigations by the EPA have indicated that distances of 210 to 325 m away from septic tanks are necessary to achieve with high confidence an 11 order of magnitude reduction in virus concentrations.
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Robertson JB, Eaddy JM, Archambeau JO, Coutrakon GB, Miller DW, Moyers MF, Siebers JV, Slater JM, Dicello JF. Relative biological effectiveness and microdosimetry of a mixed energy field of protons up to 200 MeV. Adv Space Res 1994; 14:271-275. [PMID: 11539961 DOI: 10.1016/0273-1177(94)90477-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We have studied radiation effects utilizing the new 250 MeV Synchrotron at Loma Linda University Medical Center. In this paper we present the data collected for the survival of Chinese hamster lung (V79) cells, that were irradiated with a beam of mixed energy protons up to 200 MeV. The RBE for protons, when compared to 60Co gamma rays, ranged from a low of 1.2 at the high energy portion of the field to 1.3+ at the low energy portion of the field. These results are consistent with the measured lineal energy (microdosimetric) spectra.
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Arteaga CL, Hurd SD, Dugger TC, Winnier AR, Robertson JB. Epidermal growth factor receptors in human breast carcinoma cells: a potential selective target for transforming growth factor alpha-Pseudomonas exotoxin 40 fusion protein. Cancer Res 1994; 54:4703-9. [PMID: 8062268] [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: 01/28/2023]
Abstract
Epidermal growth factor (EGF) receptors are expressed in high levels by some poor prognosis breast tumors. We have examined the cytotoxic effect of the tumor growth factor alpha (TGF alpha)-delta Cys-Pseudomonas exotoxin (PE40) recombinant fusion protein on normal and tumorigenic human breast epithelial cells in vitro and in vivo. The MDA-468, MDA-231, BT-20, and MCF-7ADR estrogen receptor-negative, EGF receptor-rich breast cancer lines were exquisitely sensitive in vitro to TGF alpha-delta Cys-PE40 with a 50% inhibitory concentration of < or = 0.02 nM. The estrogen receptor-positive, low EGF receptor MCF-7, ZR75-1, and T47D cells were less sensitive to the fusion toxin with a 50% inhibitory concentration of > 0.2 nM. The nontumorigenic cell lines 184, 184A1, and 184B5 were relatively resistant to TGF alpha-delta Cys-PE40 despite exhibiting high levels of EGF receptors. Continuous i.p. administration of TGF alpha-delta Cys-PE40 via an osmotic minipump at a dose of 0.4 microgram/g/day over 7 days inhibited MDA-468, MA-231, and BT-20 but not MCF-7 tumor growth in female athymic mice. Host tissue toxicity was not observed with this dose of TGF alpha-delta Cys-PE40. Mixed MDA-468/MCF-7 tumors were established in nude mice after coinoculation of both cell types in estrogen-supplemented animals. EGF receptor immunohistochemistry and immunoblot procedures indicated that TGF alpha-PE40 eliminated the MDA-468 cells while sparing the adjacent MCF-7 cells. By immunoblot, EGF receptors were consistently more abundant in tumor tissue than in adjacent nontumor tissue from the same mastectomy specimen (n = 7). These data support the notion that EGF receptors can be selectively targeted in human breast cancer cells for the delivery of antitumor agents. Further clinical studies with TGF alpha-delta Cys-PE40 and other chimeric toxins using the same cellular target will address this possibility.
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Affiliation(s)
- C L Arteaga
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
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Abstract
From July 1988 to August 1991, 174 stone treatments were attempted on 112 stones in 86 patients using a Therasonics lithotriptor. Mean stone diameter was 13 mm. (range 4 to 60). The success rate (defined as no debris or fragments less than 4 mm. in an asymptomatic patient) was 49% and the retreatment rate was 63%. Subjects reported moderate to severe pain during 70 treatment sessions (42%) despite sedation with parenteral narcotics (50 to 100 mg. meperidine and 50 mg. hydroxyzine intramuscularly). One patient had perirenal bleeding requiring a 7-unit blood transfusion. Of the treatments 24 (13%) were aborted, 10 due to pain and 13 because of inability of the operator to position the patient or localize the stone. These results appear to be inferior to those reported with alternative lithotriptors. Modifications that have been made in the Therasonics system may improve stone localization and treatment results.
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Affiliation(s)
- J B Robertson
- Department of Urology, Vanderbilt University Medical Center, Nashville, Tennessee 37232-2765
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Abstract
Although the major target organ of paraquat toxicity is the lung, the primary route of absorption of the herbicide is across the gastrointestinal epithelium. Thus, uptake of paraquat was investigated in the rat duodenal crypt cell line, IEC-6. The herbicide was toxic; as measured by cell number, the LD50 was 75 microM. Using 2 microM [14C]paraquat as tracer, uptake of the herbicide was found to be slow but linear over 24 hr at 37 degrees C. No accumulation was observed at 4 degrees C. Inhibition studies showed paraquat inhibited both putrescine and spermidine uptake after only a 15-min incubation. The Km for putrescine was increased when incubated in the presence of paraquat whereas Vmax was not changed, suggesting a competitive mode of inhibition. In the reverse situation, putrescine also inhibited paraquat uptake (IC50 10 microM). Paraquat uptake was reduced in a dose-dependent manner by the putative calmodulin antagonist W-7, but was not affected by KN-62, a Ca2+/calmodulin kinase II specific inhibitor. These results provide evidence that paraquat uptake occurs through the polyamine transport system in IEC-6 cells. Furthermore, this process is modulated by intracellular events involving a major signaling protein, Ca2+/calmodulin.
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Affiliation(s)
- V Grabie
- Department of Environmental Health, School of Allied Health, East Carolina University, Greenville, North Carolina 27858
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Abstract
Pseudomonas putida F1 and Pseudomonas sp. strain JS150 initiate toluene degradation by incorporating molecular oxygen into the aromatic nucleus to form cis-1,2-dihydroxy-3-methylcyclohexa-3,5-diene. When toluene-grown cells were incubated with 2- and 3-nitrotoluene, the major products identified were 2- and 3-nitrobenzyl alcohol, respectively. The same cells oxidized 4-nitrotoluene to 2-methyl-5-nitrophenol and 3-methyl-6-nitrocatechol. Escherichia coli JM109(pDTG601), which contains the toluene dioxygenase genes from P. putida F1 under the control of the tac promoter, oxidized the isomeric nitrotoluenes to the same metabolites as those formed by P. putida F1 and Pseudomonas sp. strain JS150. These results extend the range of substrates known to be oxidized by this versatile enzyme and demonstrate for the first time that toluene dioxygenase can oxidize an aromatic methyl substituent.
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Affiliation(s)
- J B Robertson
- Air Force Civil Engineering Support Agency, Tyndall Air Force Base, Florida 32403
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48
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Abstract
There is a need to standardize the NDF procedure. Procedures have varied because of the use of different amylases in attempts to remove starch interference. The original Bacillus subtilis enzyme Type IIIA (XIA) no longer is available and has been replaced by a less effective enzyme. For fiber work, a new enzyme has received AOAC approval and is rapidly displacing other amylases in analytical work. This enzyme is available from Sigma (Number A3306; Sigma Chemical Co., St. Louis, MO). The original publications for NDF and ADF (43, 53) and the Agricultural Handbook 379 (14) are obsolete and of historical interest only. Up to date procedures should be followed. Triethylene glycol has replaced 2-ethoxyethanol because of reported toxicity. Considerable development in regard to fiber methods has occurred over the past 5 yr because of a redefinition of dietary fiber for man and monogastric animals that includes lignin and all polysaccharides resistant to mammalian digestive enzymes. In addition to NDF, new improved methods for total dietary fiber and nonstarch polysaccharides including pectin and beta-glucans now are available. The latter are also of interest in rumen fermentation. Unlike starch, their fermentations are like that of cellulose but faster and yield no lactic acid. Physical and biological properties of carbohydrate fractions are more important than their intrinsic composition.
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Affiliation(s)
- P J Van Soest
- Cornell University, Department of Animal Science, Ithaca, NY
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49
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Cincotta RP, Soest PJV, Robertson JB, Beall CM, Goldstein MC. Foraging Ecology of Livestock on the Tibetan Changtang: A Comparison of Three Adjacent Grazing Areas. ACTA ACUST UNITED AC 1991. [DOI: 10.2307/1551379] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Abstract
Total dietary fiber (TDF) values for cereal grains, fruits, vegetables, processed foods, and purified or semi-purified dietary fiber products were determined by a new method using 8M urea and enzymes (urea enzymatic dialysis, UED, method). The results are compared with the official AOAC procedure. Soluble and insoluble dietary fiber were determined for several of these foodstuffs and compared with the NDF values. Crude protein and ash contamination was usually lower with the UED method compared with the AOAC method, particularly for samples that formed gels during ethanol precipitation. Urea and the heat stable amylase were effective in removing starch even at relatively low temperatures of the assay (50 degrees C). The new assay is relatively economical in use of equipment, enzymes, and reagents. Studies are currently in progress to minimize the assay time for the UED method while further improving its flexibility and robustness. The results of the studies will be discussed.
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Affiliation(s)
- J L Jeraci
- Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853
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