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Intervertebral disc degeneration in dogs

Bergknut, Niklas (2010). Intervertebral disc degeneration in dogs. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2010:91
ISBN 978-91-576-7536-1
[Doctoral thesis]

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Abstract

Back pain is common in both dogs and humans, and is often associated with intervertebral disc (IVD) degeneration. The IVDs are essential structures of the spine and degeneration can ultimately result in diseases such as IVD herniation or spinal instability. In order to design new treatments halting or even preventing IVD degeneration, more basic knowledge of the disease process is needed. The aim of this thesis was to increase the knowledge of IVD degeneration in dogs and to evaluate the similarities and differences between IVD degeneration in dogs and humans, in order to establish whether spontaneous IVD degeneration occurring in both chondrodystrophic (CD) and non-chondrodystrophic (NCD) dog breeds can be used as translational animal models for human spine research. The key findings of the thesis were: • The division of the processes underlying canine IVD degeneration into chondroid or fibroid degeneration appears to be inaccurate. The biochemical, histopathological, and morphological alterations examined during the process of IVD degeneration were found to be similar in CD and NCD dog breeds. • IVD degenerative diseases were most common in CD breeds, especially in Dachshunds, and were 1.5 times more common in male than female dogs. Case fatality rates were found to be higher than previously suggested, with rates of 34% in the overall population, around 20% in most CD breeds, and over 50% in the NCD breeds at highest risk such as the Doberman and the German Shepherd Dog. • IVD degeneration in dogs could accurately be diagnosed, early in the degenerative process, by using low-field magnetic resonance imaging (MRI). The MRI based grading scheme used in humans could reliably be used in dogs, and was found to be highly correlated with pathological changes found post mortem. Early diagnosis facilitates the possibility of preemptive treatments. • A new nucleus pulposus prosthesis, made of an intrinsically radiopaque hydrogel, was tested ex-vivo in dogs. Surgical implantation of the prosthesis in canine lumbosacral IVDs via a dorsal laminectomy was clinically applicable. After absorbing fluid from the surrounding tissue the swollen implant could restore disc height, which could be monitored by radiography, computed tomography and MRI. • Many similarities were found between the processes of IVD degeneration in humans and CD and NCD dog breeds. Both dog-types may serve as translational animal models of spontaneous IVD degeneration for human research. Synergistic effects of studying IVD degeneration in veterinary patients could lead to new treatment modalities for both dogs and humans, a reduced need for animal testing, and lower cost of research. It is also likely that spontaneous IVD degeneration in dogs more resembles the true disease process, as it occurs in humans, than induced IVD degeneration in experimental animals.

Authors/Creators:Bergknut, Niklas
Title:Intervertebral disc degeneration in dogs
Year of publishing :2010
Volume:2010:91
Number of Pages:53
Papers/manuscripts:
NumberReferences
ALLI. Bergknut N, Egenvall A, Hagman R, Gustas P, Meij BP, Hazewinkel HAW, Lagerstedt A-S. Incidence and mortality of diseases related to intervertebral disc degeneration in a population of over 600,000 dogs. Journal of the American Veterinary Medical Association provisionally accepted (2010). II. Bergknut N, Auriemma E, Wijsman SJCM, Voorhout G, Hagman R, Lagerstedt A-S, Hazewinkel HAW, Meij BP. Pfirrmann grading of intervertebral disc degeneration in chondrodystrophic and non-chondrodystrophic dogs with low-field magnetic resonance imaging. American Journal of Veterinary Research accepted (2010). III. Bergknut N, Grinwis GCM, Pickée EB, Auriemma E, Lagerstedt A-S, Hagman R, Hazewinkel HAW, Meij BP.Validation of macroscopic grading of canine intervertebral disc degeneration according to Thompson and correlation with low-field magnetic resonance imaging findings. American Journal of Veterinary Research accepted (2010). IV. Bergknut N, Rutges JPHJ, Smolders LA, Kranenburg HC, Hagman R, Lagerstedt A-S, Grinwis GCM, Voorhout G, Creemers LB, Dhert WJA, Hazewinkel HAW, Meij BP. The dog as an animal model for human intervertebral disc degeneration? Spine under revision (2010). V. Bergknut N, Smolders LA, Koole LH, Voorhout G, Hagman R, Lagerstedt A-S, Saralidze K, Hazewinkel HAW, van der Veen AJ, Meij BP. An ex-vivo investigation of the properties of a new nucleus pulposus prosthesis in canine spines. Biomaterials (2010) Sep;31(26):6782-8.
Place of Publication:Uppsala
Publisher:Dept. of Clinical Sciences, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SLU - Research Areas for the Future > Future Animal Health and Welfare
ISBN for printed version:978-91-576-7536-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L70 Veterinary science and hygiene - General aspects
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 403 Veterinary Science > Clinical Science
Agrovoc terms:dogs, intervertebral disks, intervertebral disk diseases, animal diseases, breeds (animals), diagnosis, magnetic resonance imaging, animal models
Keywords:Intervertebral disc degeneration, dog, canine, herniation, spontaneous animal model.
URN:NBN:urn:nbn:se:slu:epsilon-3144
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-3144
ID Code:2427
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Clinical Sciences
Deposited By: Niklas Bergknut
Deposited On:14 Jan 2011 00:00
Metadata Last Modified:02 Dec 2014 10:18

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