Medicine and Health Sciences Commons^™

The Role Of Systemic Inflammation In The Development Of Equine Laminitis, Elizabeth Maryrose Tadros

Doctoral Dissertations

Laminitis is a crippling disease of horses that can result in chronic lameness and debilitation, and sometimes warrants euthanasia. It is a complication of inflammatory conditions such as gastrointestinal disease, and also occurs in obese, insulin-resistant horses with Equine Metabolic Syndrome (EMS). Inflammation and insulin resistance are risk factors for laminitis, and these mechanisms might converge to induce laminitis in susceptible animals.

Systemic inflammation is often attributed to endotoxemia, although circulating endotoxin concentrations are not commonly measured in the clinical setting. Although a theoretic basis exists for endotoxemia in the pathogenesis of laminitis, administration of endotoxin alone does …

Heifer Estrous Cycle Stage Impacts Luteinizing And Growth Hormone Response To Kisspeptin, Brian K. Whitlock, Joseph A. Daniel, Robyn R. Wilborn, Barbara P. Steele, James L. Sartin

Animal Science Publications and Other Works

The reproductive neuropeptide, kisspeptin (KP), may have a role in regulation of growth hormone (GH) secretion. Expression of KP and its receptor (Kiss1r) are developmentally and hormonally regulated. This study was conducted to determine the effects of KP on plasma concentrations of luteinizing hormone (LH) and GH in pubertal heifers during different functional reproductive stages. Heifers received a single injection of KP (100 pmole / kg) or saline intravenously during proestrus, estrus, and diestrus, and serial blood samples were collected for 3 hours to determine the response of both LH and GH after treatment. Mean concentrations of LH were increased …

Effect Of Kisspeptin On Regulation Of Growth Hormone, Brian K. Whitlock, Joseph A. Daniel, Robyn R. Wilborn, Herris S. Maxwell, Barbara P. Steele, James L. Sartin

Animal Science Publications and Other Works

Kisspeptin ( KP ), a neuroendocrine regulator of reproduction, is hypothesized to be an integrator of metabolism and hormones critical to the regulation of reproduction. Lactation is associated with enhanced growth hormone (GH) responsiveness and reduced fertility. Our study was designed to determine the effects of lactation on KP-stimulated GH and luteinizing hormone (LH) secretion. Five non-lactating and five lactating dairy cows were used in the study. Experiments were conducted with lactating cows at weeks 1, 5 and 11 after parturition. The experimental treatments ( saline and KP [100 and 400 pmol / kg body weight]) were given intravenously and …

Role Of Il-17 And Th17 Cells In Hsv Induced Ocular Immunopathology, Amol Sahebrao Suryawanshi

Doctoral Dissertations

Herpes simplex virus (HSV) infection of the cornea leads to a blinding immuno-inflammatory condition of the eye also called stromal keratitis (SK). SK immunopathology is characterized by the infiltration of CD4⁺ T cells of Th1 phenotype as well as the development of new blood vessels into the normally avascular cornea. Studies in mouse models of SK have firmly established the role of CD4⁺ T cells, and particularly of Th1 phenotype, as the principal mediators of SK immunopathology. However, with the recent discovery of IL-17A and Th17 cells, the role of this cytokine as well as Th17 cells remains …

The Effect Of Kisspeptin Receptor Agonist (Ftm080) On Luteinizing Hormone In Sheep, Brian K. Whitlock, Joseph A. Daniel, Maria Hes, Barbara P. Steele, James L. Sartin, S. Oishi, N. Fujii

Animal Science Publications and Other Works

Kisspeptin receptor (Kiss1r) agonists with increased half-life and similar efficacy to kisspeptin (KP) in vitro potentially may provide beneficial applications in breeding management of many species. However, many of these agonists have not been tested in vivo. This study was designed to test the effect of a Kiss1r agonist (FTM080) on luteinizing hormone (LH) in vivo. Sheep were treated with FTM080 (500 pmol/kg BW) or sterile water in a 2-ml bolus via the jugular cannula. Serial blood samples were collected every 15-min before (1 hr) and after (1 hr) treatment. Intravenous (IV) injection of FTM080 increased (P < 0.05) LH plasma concentrations through the 45-min sample following treatment. Moreover, the area under the curve of LH in the period from 0 to 60-min following FTM080 treatment was also increased (P < 0.05). These data provide evidence to suggest that FTM080 stimulates the gonadotropic axis of ruminants in vivo.

Volume 8, Number 1 (Spring/Summer 2011), Ut Institute Of Agriculture

Tennessee Land, Life and Science Magazine

Issue Highlights:

• Planting a Garden of Hope for Cancer Patients
• In Smith County, a Community Reinvents Itself
• Advancing Tennessee Through Strategic Extension

The Effect Of Midazolam On End-Tidal Concentration Of Isoflurane Necessary To Prevent Movements In Dogs, Reza Seddighi Dvm, Ms, Phd, Dip Acva

Faculty Publications and Other Works -- Biomedical and Diagnostic Sciences

Objective To determine the possible additive effect of midazolam, a GABAA agonist, on the end-tidal concentration of isoflurane that prevents movement (MACNM) in response to noxious stimulation. Study design Randomized crossover experimental study. Animals Six, healthy, adult intact male, mixed-breed dogs. Methods After baseline isoflurane MACNM (MACNM-B) determination, midazolam was administered as a low (LDS), medium (MDS) or high (HDS) dose series of midazolam. Each series consisted of two dose levels, low and high. The LDS was a loading dose (Ld) of 0.2 mg kg-1 and CRI (2.5 μg kg-1 minute-1) (LDL), followed by an Ld (0.4 mg kg-1) and …

Development Of A Mobile Teaching And Learning Module For Vm893 (Field Services) With, Brian K. Whitlock

Animal Science Publications and Other Works

The goal of this project is to develop a teaching and learning module with interactive comprehension assessments that can be used in a mobile (truck) or stationary (classroom) environment. A considerable portion of the Field Services clinical rotation is spent with students driving from the UT Veterinary Medical Center and from farm to farm in a large four-door truck. During these trips a consistent set of relevant topics will be delivered to students by discussing clinical cases. The format will be interactive and students will be equipped with technology allowing an assessment of their comprehension. Students will have day-to-day access …

Protein C Activity In Dogs: Adaptation Of A Commercial Human Colorimetric Assay And Evaluation Of Effects Of Storage Time And Temperature, Michael M. Fry, Karl R. Snyder, Karen M. Tobias, Baye G. Williamson, Ann Reed

Faculty Publications and Other Works -- Biomedical and Diagnostic Sciences

Objectives of this study were to adapt a commercial human protein C (PC) colorimetric assay for use in dogs and to investigate effects of various storage conditions. The human assay was modified by using pooled canine plasma for calibration and by increasing the activation time. PC activity was measured in fresh canine plasma and in plasma stored under various conditions. PC activity of some stored samples was significantly different from that of fresh plasma; however, differences were small. No difference was detected in samples stored under similar conditions but analyzed in different laboratories using similar methodology. Results of this study …

Volume 8, Number 2 (Fall/Winter 2011), Ut Institute Of Agriculture

Tennessee Land, Life and Science Magazine

Issue Highlights:

• Outreach to African Nation of Lesotho Takes No-till to a New Level
• UT Center Provides National Training in Food Security
• Dr. Larry Arrington Arrives as Chancellor