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Lin ST, Foote AK, Bolas NM, Sargan DR, Murray RC. Histological and Histopathological Features of the Third Metacarpal/Tarsal Parasagittal Groove and Proximal Phalanx Sagittal Groove in Thoroughbred Horses with Racing History. Animals (Basel) 2024; 14:1942. [PMID: 38998057 PMCID: PMC11240324 DOI: 10.3390/ani14131942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 06/23/2024] [Accepted: 06/26/2024] [Indexed: 07/14/2024] Open
Abstract
Information regarding the histopathology of the proximal phalanx (P1) sagittal groove in racehorses is limited. Twenty-nine cadaver limbs from nine Thoroughbred racehorses in racing/race-training underwent histological examination. Histological specimens of the third metacarpal/metatarsal (MC3/MT3) parasagittal grooves and P1 sagittal grooves were graded for histopathological findings in hyaline cartilage (HC), calcified cartilage (CC), and subchondral plate and trabecular bone (SCB/TB) regions. Histopathological grades were compared between (1) fissure and non-fissure locations observed in a previous study and (2) dorsal, middle, and palmar/plantar aspects. (1) HC, CC, and SCB/TB grades were more severe in fissure than non-fissure locations in the MC3/MT3 parasagittal groove (p < 0.001). SCB/TB grades were more severe in fissure than non-fissure locations in the P1 sagittal groove (p < 0.001). (2) HC, CC, and SCB/TB grades including SCB collapse were more severe in the palmar/plantar than the middle aspect of the MC3/MT3 parasagittal groove (p < 0.001). SCB/TB grades including SCB collapse were more severe in the dorsal and middle than the palmar/plantar aspect of the P1 sagittal groove (p < 0.001). Histopathology in the SCB/TB region including bone fatigue injury was related to fissure locations, the palmar/plantar MC3/MT3 parasagittal groove, and the dorsal P1 sagittal groove.
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Affiliation(s)
- Szu-Ting Lin
- Department of Veterinary Medicine, University of Cambridge, Madingley Rd, Cambridge CB3 0ES, UK; (S.-T.L.); (D.R.S.)
| | - Alastair K. Foote
- Rossdales Veterinary Surgeons, Cotton End Rd, Exning, Newmarket CB8 7NN, UK;
| | - Nicholas M. Bolas
- Hallmarq Veterinary Imaging, Unit 5 Bridge Park, Merrow Lane, Guildford GU4 7BF, UK;
| | - David R. Sargan
- Department of Veterinary Medicine, University of Cambridge, Madingley Rd, Cambridge CB3 0ES, UK; (S.-T.L.); (D.R.S.)
| | - Rachel C. Murray
- Rossdales Veterinary Surgeons, Cotton End Rd, Exning, Newmarket CB8 7NN, UK;
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Bertuglia A, Basano I, Pagliara E, Bottegaro NB, Spinella G, Bullone M. Effect of intravenous tiludronate disodium administration on the radiographic progression of osteoarthritis of the fetlock joint in Standardbred racehorses. J Am Vet Med Assoc 2021; 259:651-661. [PMID: 34448617 DOI: 10.2460/javma.259.6.651] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To compare the effects of tiludronate disodium and 3 other medical treatments on clinical and radiographic findings and biomarkers of disease progression in horses with osteoarthritis of the fetlock joint. ANIMALS 100 Standardbred racehorses with spontaneous traumatic injury of the fetlock joint. PROCEDURES Horses were retrospectively grouped by whether they received tiludronate IV or triamcinolone acetonide and hyaluronan, polysulfated glycosaminoglycan, or interleukin-1 receptor antagonist protein intra-articularly. Data were collected on clinical, radiographic, and ultrasonographic findings and results for serum and synovial samples obtained before and 6 months after treatment. Lameness score, joint flexion test response, radiographic score, serum concentrations of tumor necrosis factor-α and carboxy-terminal telopeptides of collagen types I and II (CTX-I and II, respectively), and synovial fluid concentrations of interleukin-1β, prostaglandin E2, and CTX-II were compared among treatments. RESULTS All treatments resulted in a significant improvement in lameness score and joint flexion test response at 6 months. In horses that received triamcinolone acetonide and hyaluronan, synovial fluid interleukin-1β, prostaglandin E2, and CTX-II concentrations decreased after treatment, suggesting this treatment inhibited progression of hyaline cartilage degeneration and inflammatory processes. Horses that received tiludronate were the only group that had a decrease in radiographic score and serum CTX-I concentration after treatment, supporting the effect of tiludronate on bone metabolism. Tiludronate treatment was also followed by increases in serum and synovial fluid concentrations of CTX-II, a marker of cartilage damage. CONCLUSIONS AND CLINICAL RELEVANCE Tiludronate appeared to inhibit the radiographic progression of osteoarthritis in high-motion joints of racehorses at 6 months after treatment by inhibiting subchondral bone remodeling. Whether this effect was associated with a worsening of progressive cartilage damage remains to be ascertained.
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Fülber J, Agreste FR, Seidel SRT, Sotelo EDP, Barbosa ÂP, Michelacci YM, Baccarin RYA. Chondrogenic potential of mesenchymal stem cells from horses using a magnetic 3D cell culture system. World J Stem Cells 2021; 13:645-658. [PMID: 34249233 PMCID: PMC8246251 DOI: 10.4252/wjsc.v13.i6.645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/29/2021] [Accepted: 06/04/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) represent a promising therapy for the treatment of equine joint diseases, studied due to their possible immunomodulatory characteristics and regenerative capacity. However, the source of most suitable MSCs for producing cartilage for regenerative processes in conjunction with biomaterials for an enhanced function is yet to be established. AIM To compare the chondrogenicity of MSCs derived from synovial fluid, bone marrow, and adipose tissue of horses, using the aggrecan synthesis. METHODS MSCs from ten horses were cultured, phenotypic characterization was done with antibodies CD90, CD44 and CD34 and were differentiated into chondrocytes. The 3D cell culture system in which biocompatible nanoparticles consisting of gold, iron oxide, and poly-L-lysine were added to the cells, and they were forced by magnets to form one microspheroid. The microspheroids were exposed to a commercial culture medium for 4 d, 7 d, 14 d, and 21 d. Proteoglycan extraction was performed, and aggrecan was quantified by enzyme-linked immunosorbent assay. Keratan sulfate and aggrecan in the microspheroids were identified and localized by immunofluorescence. RESULTS All cultured cells showed fibroblast-like appearance, the ability to adhere to the plastic surface, and were positive for CD44 and CD90, thus confirming the characteristics and morphology of MSCs. The soluble protein concentrations were higher in the microspheroids derived from adipose tissue. The aggrecan concentration and the ratio of aggrecan to soluble proteins were higher in microspheroids derived from synovial fluid than in those derived from bone marrow, thereby showing chondrogenic superiority. Microspheroids from all sources expressed aggrecan and keratan sulfate when observed using confocal immunofluorescence microscopy. All sources of MSCs can synthesize aggrecan, however, MSCs from synovial fluid and adipose tissue have demonstrated better biocompatibility in a 3D environment, thus suggesting chondrogenic superiority. CONCLUSION All sources of MSCs produce hyaline cartilage; however, the use of synovial liquid or adipose tissue should be recommended when it is intended for use with biomaterials or scaffolds.
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Affiliation(s)
- Joice Fülber
- Departamento de Clínica Médica, Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05506-270, Brazil.
| | - Fernanda R Agreste
- Departamento de Clínica Médica, Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05506-270, Brazil
| | - Sarah R T Seidel
- Departamento de Clínica Médica, Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05506-270, Brazil
| | - Eric D P Sotelo
- Departamento de Clínica Médica, Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05506-270, Brazil
| | - Ângela P Barbosa
- Departamento de Clínica Médica, Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05506-270, Brazil
| | - Yara M Michelacci
- Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04044-020, Brazil
| | - Raquel Y A Baccarin
- Departamento de Clínica Médica, Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05506-270, Brazil
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4
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Shaffer SK, To C, Garcia TC, Fyhrie DP, Uzal FA, Stover SM. Subchondral focal osteopenia associated with proximal sesamoid bone fracture in Thoroughbred racehorses. Equine Vet J 2020; 53:294-305. [PMID: 32474944 DOI: 10.1111/evj.13291] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/10/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND Proximal sesamoid bone (PSB) fracture is the most common fatal injury in Thoroughbred (TB) racehorses in the United States. Epidemiological and pathological evidence indicates PSB fracture is likely the acute culmination of a chronic stress-related process. However, the aetiopathogenesis of PSB fracture is poorly understood. OBJECTIVE To characterise bone abnormalities that precede PSB fracture. STUDY DESIGN Two retrospective case-control groups of PSBs from TB racehorses with, and without, unilateral biaxial PSB fracture. METHODS Proximal sesamoid bones were harvested post-mortem from TB racehorses subjected to euthanasia for unilateral biaxial PSB fracture (cases) or causes unrelated to PSB fracture (controls) while racing or training. The fractured medial PSB (FX-PSB) and contralateral intact medial PSB (CLI-PSB) from racehorses that sustained PSB fracture, and an intact medial PSB (CTRL-PSB) from racehorses that did not have a PSB fracture were collected as case and control specimens. Study 1 distributions of morphological features were compared among case and control groups using visual examination, photographs, radiographs and histology of whole PSBs and serial sagittal sections (10 FX-PSB, 10 CLI-PSB and 10 CTRL-PSB). Study 2 local bone volume fraction and mineral densities were compared among case and control PSBs using microcomputed tomography (9 FX-PSB, 9 CLI-PSB and 9 CTRL-PSB). RESULTS A focal subchondral lesion characterised by colocalised focal discoloration, radiolucency, osteopenia, low tissue mineral density and a surrounding region of dense cancellous bone was identified in most case horses but not in controls. This subchondral lesion was found in a slightly abaxial mid-body location and was bilaterally present in most case horses. MAIN LIMITATIONS The post-mortem samples may not represent the spectrum of abnormalities that occur throughout the development of the subchondral lesion. Lateral PSBs were not examined, so their contribution to biaxial PSB fracture pathogenesis is unknown. CONCLUSION Abaxial subchondral lesions are consistent with pre-existing injury and likely associated with PSB fracture.
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Affiliation(s)
- Sarah K Shaffer
- Department of Mechanical and Aerospace Engineering, University of California-Davis, Davis, CA, USA
| | - Celeste To
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
| | - Tanya C Garcia
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
| | - David P Fyhrie
- Departments of Orthopedic Surgery and Biomedical Engineering, University of California-Davis, Davis, CA, USA
| | - Francisco A Uzal
- California Animal Health and Food Safety Laboratory System, University of California-Davis, Davis, CA, USA
| | - Susan M Stover
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
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Shaw DJ, Rosanowski SM. Tropical joint syndrome: Exostosis on the dorsal aspect of the proximal phalanx in racing Thoroughbreds in Asia. EQUINE VET EDUC 2020. [DOI: 10.1111/eve.13062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D. J. Shaw
- Singapore Turf Club Veterinary Hospital Singapore Turf Club Singapore Singapore
| | - S. M. Rosanowski
- Department of Infectious Diseases and Public Health Jockey Club College of Veterinary Medicine and Life Sciences City University of Hong Kong Kowloon Hong Kong SAR
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Mizobe F, Nomura M, Ueno T, Yamada K. Bone marrow oedema-type signal in the proximal phalanx of Thoroughbred racehorses. J Vet Med Sci 2019; 81:593-597. [PMID: 30828037 PMCID: PMC6483912 DOI: 10.1292/jvms.18-0530] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study focused on 8 Thoroughbred racehorses showing bone marrow oedema-type signal in
the proximal sagittal groove of the proximal phalanx, with the aim of understanding its
clinical significance. Standing magnetic resonance imaging played an important role in
assessing osseous abnormalities that were not radiographically identifiable. Further, a
histopathological result from one of the cases showed there was oedema surrounding adipose
tissues with increase in density of trabecular scaffolding. This may indicate presence of
osseous injury within the area of decreased elasticity due to subchondral bone modeling.
This study suggests that detection of osseous abnormality based on bone marrow oedema-type
signal, and application of appropriate care following injury would contribute to prevent
deterioration of stress-related fractures of the proximal phalanx.
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Affiliation(s)
- Fumiaki Mizobe
- Racehorse Hospital, Miho Training Center, Japan Racing Association, Ibaraki 300-0493, Japan
| | - Motoi Nomura
- Racehorse Hospital, Ritto Training Center, Japan Racing Association, Shiga 520-3085, Japan
| | - Takanori Ueno
- Equine Research Institute, Japan Racing Association, Tochigi 329-0412, Japan
| | - Kazutaka Yamada
- Laboratory of Veterinary Radiology, School of Veterinary Medicine, Azabu University, Kanagawa 252-5201, Japan
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Stewart HL, Kawcak CE. The Importance of Subchondral Bone in the Pathophysiology of Osteoarthritis. Front Vet Sci 2018; 5:178. [PMID: 30211173 PMCID: PMC6122109 DOI: 10.3389/fvets.2018.00178] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Accepted: 07/11/2018] [Indexed: 12/31/2022] Open
Abstract
Subchondral bone plays a critical role in the pathogenesis of osteochondral disease across veterinary species. The subchondral bone is highly adaptable, with the ability to model and remodel in response to loading stresses experienced by the joint. Repetitive stress injuries within the joint can result in primary or secondary pathologic lesions within the subchondral bone, which have been recognized to contribute to the development and progression of osteoarthritis. Recent advances in diagnostic imaging, particularly volumetric imaging modalities have facilitated earlier identification of subchondral bone disease. Despite these advancements, limitations in our knowledge about subchondral bone makes treatment and prevention of these conditions challenging. The purpose of this report is to review our current understanding of subchondral bone and its relationship to osteoarthritis across veterinary species, with a specific focus in the research that has been performed in horses. It can be concluded that our current understanding of subchondral bone is advancing, and future experimental, clinical and pathologic studies will provide additional insight about subchondral bone and its relationship to joint disease.
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Affiliation(s)
- Holly L Stewart
- Equine Orthopaedic Research Center, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States
| | - Christopher E Kawcak
- Equine Orthopaedic Research Center, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States
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8
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Janes JG, Kennedy LA, Garrett KS, Engiles JB. Common lesions of the distal end of the third metacarpal/metatarsal bone in racehorse catastrophic breakdown injuries. J Vet Diagn Invest 2017; 29:431-436. [PMID: 28681688 DOI: 10.1177/1040638717717948] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Equine catastrophic skeletal breakdown injury is a serious issue within the racing industry, given the impact on equine and human health. The metacarpo- and metatarso-phalangeal (fetlock) joints are common sites of catastrophic injury. However, lesions involving articular cartilage, subchondral bone, and synovium are commonly identified within the fetlock of the contralateral limb; hence, it is imperative that lesions in both limbs are evaluated and characterized during postmortem examination. Bone and articular cartilage changes typically occur in specific locations, related to cyclic fetlock load and overextension during high-speed exercise. Associations between preexisting degenerative fetlock lesions and catastrophic injury are a focus of continued research. These lesions often occur because of adaptive failure related to cumulative damage. Further investigation of these lesions is imperative to determine their impact on equine performance or injury. Ultimately, consistent documentation of catastrophic versus non-catastrophic osteochondral lesions provided by pathologists, in the context of training history, diagnostic imaging, and the presence or absence of catastrophic injury, will contribute to further understanding of skeletal responses associated with catastrophic failure.
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Affiliation(s)
- Jennifer G Janes
- Departments of Veterinary Science and Veterinary Diagnostic Laboratory, University of Kentucky, Lexington, KY (Janes, Kennedy).,Rood and Riddle Equine Hospital, Lexington, KY (Garrett).,Departments of Pathobiology and Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square, PA (Engiles)
| | - Laura A Kennedy
- Departments of Veterinary Science and Veterinary Diagnostic Laboratory, University of Kentucky, Lexington, KY (Janes, Kennedy).,Rood and Riddle Equine Hospital, Lexington, KY (Garrett).,Departments of Pathobiology and Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square, PA (Engiles)
| | - Katherine S Garrett
- Departments of Veterinary Science and Veterinary Diagnostic Laboratory, University of Kentucky, Lexington, KY (Janes, Kennedy).,Rood and Riddle Equine Hospital, Lexington, KY (Garrett).,Departments of Pathobiology and Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square, PA (Engiles)
| | - Julie B Engiles
- Departments of Veterinary Science and Veterinary Diagnostic Laboratory, University of Kentucky, Lexington, KY (Janes, Kennedy).,Rood and Riddle Equine Hospital, Lexington, KY (Garrett).,Departments of Pathobiology and Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square, PA (Engiles)
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9
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Davis AM, Fan X, Shen L, Robinson P, Riggs CM. Improved radiological diagnosis of palmar osteochondral disease in the Thoroughbred racehorse. Equine Vet J 2016; 49:454-460. [DOI: 10.1111/evj.12636] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 08/25/2016] [Indexed: 12/19/2022]
Affiliation(s)
- A. M. Davis
- Veterinary Clinical Services; The Hong Kong Jockey Club; Sha Tin Hong Kong
| | - X. Fan
- Department of Statistics; The Chinese University of Hong Kong; Sha Tin Hong Kong
| | - L. Shen
- Department of Information Engineering; The Chinese University of Hong Kong; Sha Tin Hong Kong
| | - P. Robinson
- Veterinary Clinical Services; The Hong Kong Jockey Club; Sha Tin Hong Kong
| | - C. M. Riggs
- Veterinary Clinical Services; The Hong Kong Jockey Club; Sha Tin Hong Kong
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Moreira JJ, Moraes APL, Brossi PM, Machado TSL, Michelacci YM, Massoco CO, Baccarin RYA. Autologous processed plasma: cytokine profile and effects upon injection into healthy equine joints. J Vet Sci 2014; 16:47-55. [PMID: 25269714 PMCID: PMC4367149 DOI: 10.4142/jvs.2015.16.1.47] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 09/26/2014] [Indexed: 01/15/2023] Open
Abstract
This experimental controlled study was performed to evaluate the composition of autologous processed plasma (APP), and the effects of APP intra-articular injection into healthy equine metacarpophalangeal joints. The effects on joints were analysed with a short-phase protocol and a prolonged-phase protocol using saline-injected joints as controls. For the short protocol, horses received one intra-articular APP injection. Synovial fluid samples were collected prior to the injection and 3, 6, 24, 48, and 16 h after treatment. For the prolonged protocol, the joints received three weekly injections of APP, and samples were collected at 0, 7, 14, 21, and 28 days before APP administration. IL1-ra level was found to be increased in APP compared to plasma. Upon intra-articular administration of APP, transient (up to 24 h) increases in white blood cell (WBC) counts along with elevated protein and prostaglandin E2 (PGE2) concentrations were observed in the treated joints. Over the 28-day observation period, APP did not elicit changes relative to baseline levels, but WBC counts, PGE2 and chondroitin sulphate concentrations were lower than those found in the control. In conclusion, APP intra-articular injection induced a mild and transitory inflammatory response but no inflammation reaction was observed over a longer period of treatment and observation.
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Affiliation(s)
- Juliana J Moreira
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508 270, Brazil
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Turley SM, Thambyah A, Riggs CM, Firth EC, Broom ND. Microstructural changes in cartilage and bone related to repetitive overloading in an equine athlete model. J Anat 2014; 224:647-58. [PMID: 24689513 DOI: 10.1111/joa.12177] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2014] [Indexed: 11/30/2022] Open
Abstract
The palmar aspect of the third metacarpal (MC3) condyle of equine athletes is known to be subjected to repetitive overloading that can lead to the accumulation of joint tissue damage, degeneration, and stress fractures, some of which result in catastrophic failure. However, there is still a need to understand at a detailed microstructural level how this damage progresses in the context of the wider joint tissue complex, i.e. the articular surface, the hyaline and calcified cartilage, and the subchondral bone. MC3 bones from non-fractured joints were obtained from the right forelimbs of 16 Thoroughbred racehorses varying in age between 3 and 8 years, with documented histories of active race training. Detailed microstructural analysis of two clinically important sites, the parasagittal grooves and the mid-condylar regions, identified extensive levels of microdamage in the calcified cartilage and subchondral bone concealed beneath outwardly intact hyaline cartilage. The study shows a progression in microdamage severity, commencing with mild hard-tissue microcracking in younger animals and escalating to severe subchondral bone collapse and lesion formation in the hyaline cartilage with increasing age and thus athletic activity. The presence of a clearly distinguishable fibrous tissue layer at the articular surface immediately above sites of severe subchondral collapse suggested a limited reparative response in the hyaline cartilage.
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Affiliation(s)
- Sean M Turley
- Tissue Mechanics Laboratory, Department of Chemical and Materials Engineering, University of Auckland, Auckland, New Zealand
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12
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Pinchbeck GL, Clegg PD, Boyde A, Barr ED, Riggs CM. Horse-, training- and race-level risk factors for palmar/plantar osteochondral disease in the racing Thoroughbred. Equine Vet J 2013; 45:582-6. [PMID: 23425384 PMCID: PMC3883097 DOI: 10.1111/evj.12038] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 12/07/2012] [Indexed: 11/29/2022]
Abstract
Reasons for performing study Palmar/plantar osteochondral disease (POD) is a common, debilitating condition in Thoroughbred racehorses; however, training- and racing-related factors associated with this disease are unknown. Objectives To determine horse-, racing- and training-related risk factors for POD. The general hypotheses were that early training and racing, and increased intensity of racing and training, lead to increased severity of POD. Methods The metacarpo/metatarsophalangeal joints of 164 Thoroughbred racehorses were examined at post mortem and graded for third metacarpal and metatarsal POD. The relationships between training- and racing-related factors and grade of POD in each condyle were determined using multilevel, multivariable, ordinal logistic regression models. Results A total of 1288 condyles were graded. Factors associated with higher grades of POD were the total lifetime number of races, an increase in gallop sessions in the previous season, racing before import to Hong Kong and an increase in the number of short (8–16 weeks) between-race intervals per season. Horses in their first racing season were more likely to have lower POD grades, while horses that had a long between-race interval (greater than 16 weeks) in the season prior to euthanasia were also more likely to have lower POD grades. Lower POD grades were significantly more likely as days since last race increased up to 400 days. Age at first race was not significantly associated with grade of POD. Conclusions and potential relevance Cumulative racing exposure and training intensity in the previous season were associated with higher grades of POD, supporting the hypothesis that the disease is due to repetitive loading. Longer between-race intervals and increased time since racing were associated with lower POD grades, which may indicate that lesions heal. Further work is required to enable optimisation of racing and training programmes to reduce the frequency and severity of this disease.
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Affiliation(s)
- G L Pinchbeck
- Institute of Infection and Global Health, Faculty of Health and Life Sciences, University of Liverpool, UK.
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13
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Paris DBBP, Stout TAE. Equine embryos and embryonic stem cells: defining reliable markers of pluripotency. Theriogenology 2010; 74:516-24. [PMID: 20071015 DOI: 10.1016/j.theriogenology.2009.11.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2009] [Revised: 11/29/2009] [Accepted: 11/29/2009] [Indexed: 01/22/2023]
Abstract
Cartilage and tendon injuries are a significant source of animal wastage and financial loss within the horse-racing industry. Moreover, both cartilage and tendon have limited intrinsic capacity for self-repair, and the functionally inferior tissue produced within a lesion may reduce performance and increase the risk of reinjury. Stem cells offer tremendous potential for accelerating and improving tissue healing, and adult mesenchymal stem cells (MSCs) are already used to treat cartilage and tendon injuries in horses. However, MSCs are scarce in the bone marrow isolates used, have limited potential for proliferation and differentiation in vitro, and do not appear to noticeably improve long-term functional repair. Embryonic stem cells (ESCs) or induced pluripotent stem (iPS) cells could overcome many of the limitations and be used to generate tissues of value for equine regenerative medicine. To date, six lines of putative ESCs have been described in the horse. All expressed stem cell-associated markers and exhibited longevity and pluripotency in vitro, but none have been proven to exhibit pluripotency in vivo. Moreover, it is becoming clear that the markers used to characterize the putative ESCs were inadequate, primarily because studies in domestic species have revealed that they are not specific to ESCs or the pluripotent inner cell mass, but also because the function of most in the maintenance of pluripotency is not known. Future derivation and validation of equine embryonic or other pluripotent stem cells would benefit greatly from a reliable panel of molecular markers specific to pluripotent cells of the developing horse embryo.
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Affiliation(s)
- D B B P Paris
- Department of Equine Sciences, Faculty of Veterinary Medicine, University of Utrecht, Utrecht, The Netherlands.
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14
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Taylor SE, Smith RKW, Clegg PD. Mesenchymal stem cell therapy in equine musculoskeletal disease: scientific fact or clinical fiction? Equine Vet J 2010; 39:172-80. [PMID: 17378447 DOI: 10.2746/042516407x180868] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The goal in the therapeutic use of mesenchymal stem cells (MSCs) in musculoskeletal disease is to harness the regenerative nature of these cells focussing on their potential to grow new tissues and organs to replace damaged or diseased tissue. Laboratory isolation of MSCs is now well established and has recently been demonstrated for equine MSCs. Stem cell science has attracted considerable interest in both the scientific and clinical communities because of its potential to regenerate tissues. Research into the use of MSCs in tissue regeneration in general reflects human medical needs, however, the nature, prevalence and prognosis of superficial digital flexor tendonitis has put equine veterinary science at the forefront of tendon regeneration research. Much has been investigated and learnt but it must be appreciated that in spite of this, the field is still relatively young and both communities must prepare themselves for considerable time and effort to develop the technology into a highly efficient treatments. The promise of functional tissue engineering to replace old parts with new fully justifies the interest. At present, however, it is important to balance the understanding of our current limitations with a desire to progress the technology.
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Affiliation(s)
- S E Taylor
- Department of Veterinary Clinical Science, University of Liverpool, Leahurst, Chester High Road, Neston, Cheshire CH64 7TE, UK
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Post mortem evaluation of palmar osteochondral disease (traumatic osteochondrosis) of the metacarpo/metatarsophalangeal joint in Thoroughbred racehorses. Equine Vet J 2010; 41:366-71. [DOI: 10.2746/042516409x368372] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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BIGGI MARIANNA, DYSON SUEJ, MURRAY RACHELC. SCINTIGRAPHIC ASSESSMENT OF THE METACARPOPHALANGEAL AND METATARSOPHALANGEAL JOINTS OF HORSES WITH JOINT PAIN. Vet Radiol Ultrasound 2009; 50:536-44. [DOI: 10.1111/j.1740-8261.2009.01579.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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Lloyd D, Johanson C, Phillips TJ. Treatment of medial condylar fractures of the third metatarsus in three horses with fibreglass casts under standing neuroleptanalgesia. Vet Rec 2008; 162:586-9. [DOI: 10.1136/vr.162.18.586] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- D. Lloyd
- Liphook Equine Hospital; Forest Mere Liphook Hampshire GU30 7JG
| | - C. Johanson
- Western Counties Equine Clinic; Culmstock Cullompton Devon EX15 3LA
| | - T. J. Phillips
- Liphook Equine Hospital; Forest Mere Liphook Hampshire GU30 7JG
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