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Tomé I, Costa L, Alves-Pimenta S, Sargo R, Pereira J, Colaço B, Ginja M. Morphometric Assessment of the Hip Joint in a Functional Dysplastic Rabbit Model. Vet Sci 2024; 11:387. [PMID: 39195841 PMCID: PMC11359858 DOI: 10.3390/vetsci11080387] [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: 06/24/2024] [Revised: 08/09/2024] [Accepted: 08/21/2024] [Indexed: 08/29/2024] Open
Abstract
The present study investigates the morphometric changes in the hip joint in a surgically induced rabbit model of hip dysplasia through the sectioning of the ligamentum capitis femoris and pelvic limb immobilization. A total of seventeen rabbits were evaluated using radiographic and computed tomographic imaging to measure the following parameters: the femoral angles of anteversion and inclination, length and width indexes of the neck of the femur, and acetabular depth and ventroversion. Significant differences in femoral anteversion angle and acetabular depth were observed, particularly in the group of hip instability surgery with pelvic limb immobilization. The results have shown the influence of hip joint instability in the promotion of femoral anteversion and acetabular shallowing. These findings provide a foundation for future research on naturally occurring or experimentally induced hip dysplasia in rabbits and underscore the model's potential for studying the biomechanical and developmental aspects of hip joint disorders.
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Affiliation(s)
- Inês Tomé
- Veterinary Teaching Hospital, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (I.T.)
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Luís Costa
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Sofia Alves-Pimenta
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
- Department of Animal Science, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Roberto Sargo
- Veterinary Teaching Hospital, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (I.T.)
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - José Pereira
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Bruno Colaço
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
- Department of Animal Science, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Mário Ginja
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), CECAV-Veterinary and Animal Science Research Centre, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
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Xu L, Kazezian Z, Pitsillides AA, Bull AMJ. A synoptic literature review of animal models for investigating the biomechanics of knee osteoarthritis. Front Bioeng Biotechnol 2024; 12:1408015. [PMID: 39132255 PMCID: PMC11311206 DOI: 10.3389/fbioe.2024.1408015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 07/02/2024] [Indexed: 08/13/2024] Open
Abstract
Osteoarthritis (OA) is a common chronic disease largely driven by mechanical factors, causing significant health and economic burdens worldwide. Early detection is challenging, making animal models a key tool for studying its onset and mechanically-relevant pathogenesis. This review evaluate current use of preclinical in vivo models and progressive measurement techniques for analysing biomechanical factors in the specific context of the clinical OA phenotypes. It categorizes preclinical in vivo models into naturally occurring, genetically modified, chemically-induced, surgically-induced, and non-invasive types, linking each to clinical phenotypes like chronic pain, inflammation, and mechanical overload. Specifically, we discriminate between mechanical and biological factors, give a new explanation of the mechanical overload OA phenotype and propose that it should be further subcategorized into two subtypes, post-traumatic and chronic overloading OA. This review then summarises the representative models and tools in biomechanical studies of OA. We highlight and identify how to develop a mechanical model without inflammatory sequelae and how to induce OA without significant experimental trauma and so enable the detection of changes indicative of early-stage OA in the absence of such sequelae. We propose that the most popular post-traumatic OA biomechanical models are not representative of all types of mechanical overloading OA and, in particular, identify a deficiency of current rodent models to represent the chronic overloading OA phenotype without requiring intraarticular surgery. We therefore pinpoint well standardized and reproducible chronic overloading models that are being developed to enable the study of early OA changes in non-trauma related, slowly-progressive OA. In particular, non-invasive models (repetitive small compression loading model and exercise model) and an extra-articular surgical model (osteotomy) are attractive ways to present the chronic natural course of primary OA. Use of these models and quantitative mechanical behaviour tools such as gait analysis and non-invasive imaging techniques show great promise in understanding the mechanical aspects of the onset and progression of OA in the context of chronic knee joint overloading. Further development of these models and the advanced characterisation tools will enable better replication of the human chronic overloading OA phenotype and thus facilitate mechanically-driven clinical questions to be answered.
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Affiliation(s)
- Luyang Xu
- Department of Bioengineering, Imperial College London, London, United Kingdom
- Centre for Blast Injury Studies, Imperial College London, London, United Kingdom
| | - Zepur Kazezian
- Department of Bioengineering, Imperial College London, London, United Kingdom
- Centre for Blast Injury Studies, Imperial College London, London, United Kingdom
| | - Andrew A. Pitsillides
- Skeletal Biology Group, Comparative Biomedical Sciences, Royal Veterinary College, London, United Kingdom
| | - Anthony M. J. Bull
- Department of Bioengineering, Imperial College London, London, United Kingdom
- Centre for Blast Injury Studies, Imperial College London, London, United Kingdom
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Tomé I, Alves-Pimenta S, Sargo R, Pereira J, Colaço B, Brancal H, Costa L, Ginja M. Mechanical osteoarthritis of the hip in a one medicine concept: a narrative review. BMC Vet Res 2023; 19:222. [PMID: 37875898 PMCID: PMC10599070 DOI: 10.1186/s12917-023-03777-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 10/06/2023] [Indexed: 10/26/2023] Open
Abstract
Human and veterinary medicine have historically presented many medical areas of potential synergy and convergence. Mechanical osteoarthritis (MOA) is characterized by a gradual complex imbalance between cartilage production, loss, and derangement. Any joint instability that results in an abnormal overload of the joint surface can trigger MOA. As MOA has a prevailing mechanical aetiology, treatment effectiveness can only be accomplished if altered joint mechanics and mechanosensitive pathways are normalized and restored. Otherwise, the inflammatory cascade of osteoarthritis will be initiated, and the changes may become irreversible. The management of the disease using non-steroidal anti-inflammatory drugs, analgesics, physical therapy, diet changes, or nutraceuticals is conservative and less effective. MOA is a determinant factor for the development of hip dysplasia in both humans and dogs. Hip dysplasia is a hereditary disease with a high incidence and, therefore, of great clinical importance due to the associated discomfort and significant functional limitations. Furthermore, on account of analogous human and canine hip dysplasia disease and under the One Medicine concept, unifying veterinary and human research could improve the well-being and health of both species, increasing the acknowledgement of shared diseases. Great success has been accomplished in humans regarding preventive conservative management of hip dysplasia and following One Medicine concept, similar measures would benefit dogs. Moreover, animal models have long been used to better understand the different diseases' mechanisms. Current research in animal models was addressed and the role of rabbit models in pathophysiologic studies and of the dog as a spontaneous animal model were highlighted, denoting the inexistence of rabbit functional models to investigate therapeutic approaches in hip MOA.
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Affiliation(s)
- I Tomé
- Department of Veterinary Sciences, University of Trás-Os-Montes E Alto Douro, Vila Real, 5000-801, Portugal.
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal.
| | - S Alves-Pimenta
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
- Department of Animal Science, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
| | - R Sargo
- Department of Veterinary Sciences, University of Trás-Os-Montes E Alto Douro, Vila Real, 5000-801, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
| | - J Pereira
- Department of Veterinary Sciences, University of Trás-Os-Montes E Alto Douro, Vila Real, 5000-801, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
| | - B Colaço
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
- Department of Animal Science, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
| | - H Brancal
- Clínica Veterinária da Covilhã, Covilhã, 6200-289, Portugal
| | - L Costa
- Department of Veterinary Sciences, University of Trás-Os-Montes E Alto Douro, Vila Real, 5000-801, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
| | - M Ginja
- Department of Veterinary Sciences, University of Trás-Os-Montes E Alto Douro, Vila Real, 5000-801, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science - AL4AnimalS, University of Trás-Os-Montes E Alto Douro, Vila Real, Portugal
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Marshall NW, Vandenbroucke D, Cockmartin L, Wanninger F, Smet M, Feng Y, Ni Y, Bosmans H. Seven general radiography x-ray detectors with pixel sizes ranging from 175 to 76 μm: technical evaluation with the focus on orthopaedic imaging. Phys Med Biol 2023; 68:195007. [PMID: 37659394 DOI: 10.1088/1361-6560/acf642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 09/01/2023] [Indexed: 09/04/2023]
Abstract
Aim. Flat panel detectors with small pixel sizes general can potentially improve imaging performance in radiography applications requiring fine detail resolution. This study evaluated the imaging performance of seven detectors, covering a wide range of pixel sizes, in the frame of orthopaedic applications.Material and methods. Pixel sizes ranged from 175 (detector A175) to 76μm (detector G76). Modulation transfer function (MTF) and detective quantum efficiency (DQE) were measured using International Electrotechnical Commission (IEC) RQA3 beam quality. Threshold contrast (CT) and a detectability index (d') were measured at three air kerma/image levels. Rabbit shoulder images acquired at 60 kV, over five air kerma levels, were evaluated in a visual grading study for anatomical sharpness, image noise and overall diagnostic image quality by four radiologists. The detectors were compared to detector E124.Results. The 10% point of the MTF ranged from 3.21 to 4.80 mm-1, in going from detector A175to detector G76. DQE(0.5 mm-1) measured at 2.38μGy/image was 0.50 ± 0.05 for six detectors, but was higher for F100at 0.62. High frequency DQE was superior for the smaller pixel detectors, howeverCTfor 0.25 mm discs correlated best with DQE(0.5 mm-1). Correlation betweenCTand the detectability model was good (R2= 0.964).CTfor 0.25 mm diameter discs was significantly higher for D150and F100compared to E124. The visual grading data revealed higher image quality ratings for detectors D125and F100compared to E124. An increase in air kerma was associated with improved perceived sharpness and overall quality score, independent of detector. Detectors B150, D125, F100and G76, performed well in specific tests, however only F100consistently outperformed the reference detector.Conclusion. Pixel size alone was not a reliable predictor of small detail detectability or even perceived sharpness in a visual grading analysis study.
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Affiliation(s)
- N W Marshall
- UZ Gasthuisberg, Department of Radiology, Herestraat 49, B-3000 Leuven, Belgium
- Medical Imaging Research Center, Medical Physics and Quality Assessment, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
- Agfa N.V., Septestraat 27, B-2640 Mortsel, Belgium
| | | | - L Cockmartin
- UZ Gasthuisberg, Department of Radiology, Herestraat 49, B-3000 Leuven, Belgium
| | - F Wanninger
- Agfa-Gevaert HealthCare GmbH, München, Germany
| | - M Smet
- UZ Gasthuisberg, Department of Radiology, Herestraat 49, B-3000 Leuven, Belgium
| | - Y Feng
- Theragnostic Laboratory, Biomedical Group, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - Y Ni
- Theragnostic Laboratory, Biomedical Group, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - H Bosmans
- UZ Gasthuisberg, Department of Radiology, Herestraat 49, B-3000 Leuven, Belgium
- Medical Imaging Research Center, Medical Physics and Quality Assessment, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
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Tomé I, Alves-Pimenta S, Costa L, Pereira J, Sargo R, Brancal H, Ginja M, Colaço B. Establishment of an ultrasound-guided protocol for the assessment of hip joint osteoarthritis in rabbits-A sonoanatomic study. PLoS One 2023; 18:e0291177. [PMID: 37708238 PMCID: PMC10501586 DOI: 10.1371/journal.pone.0291177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 08/23/2023] [Indexed: 09/16/2023] Open
Abstract
Ultrasound (US) has emerged as one of the most applied imaging tools to diagnose musculoskeletal disorders and assist in guided intra-articular administrations. Nevertheless, in evaluating the rabbit hip joint, there is a need for an ultrasonographic approach. Therefore, this study aimed to describe the hip sonoanatomy, develop and validate a US-guided protocol to assess the hip joint in rabbits and apply this protocol in vivo. This study was carried out in three phases, phase I: a pilot cadaveric study, to assess the applicability of different US approaches in the hip of rabbits and, consequently, develop a detailed US-guided protocol (2 rabbit cadavers, n = 4 hips); phase II: validation of the established US-guided protocol through a numerical scoring system in healthy joints (11 rabbit cadavers, n = 22 hips), and, lastly, phase III: application of the US-guided protocol in vivo in osteoarthritic joints (5 rabbits, n = 5 hips). A total of six planes were validated, two in the ventral approach and four in the dorsal approach. The ventral transverse plane was deemed more informative regarding the hip joint sonoanatomy, enabling the identification of a greater number of structures when compared to the other planes. Nevertheless, this study suggested that the isolated application of a plane was deemed insufficient for a complete and detailed evaluation of the hip joint anatomy, rendering it necessary to employ other planes complementarily. Furthermore, the established US-guided protocol allowed a definitive diagnosis of OA, and osteophytes and capsular hypertrophy were among the defects most frequently detected. This novel study provided US anatomical landmarks for forthcoming therapeutic research and monitoring of OA development, granting the accurate identification of osseous and cartilaginous defects.
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Affiliation(s)
- Inês Tomé
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Sofia Alves-Pimenta
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- Department of Animal Science, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Luís Costa
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - José Pereira
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Roberto Sargo
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Hugo Brancal
- Clínica Veterinária da Covilhã, Covilhã, Portugal
| | - Mário Ginja
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Bruno Colaço
- CECAV, Centre for Animal Sciences and Veterinary Studies, Associate Laboratory for Animal and Veterinary Science—AL4AnimalS, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
- Department of Animal Science, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
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Ong LJY, Fan X, Rujia Sun A, Mei L, Toh YC, Prasadam I. Controlling Microenvironments with Organs-on-Chips for Osteoarthritis Modelling. Cells 2023; 12:cells12040579. [PMID: 36831245 PMCID: PMC9954502 DOI: 10.3390/cells12040579] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
Osteoarthritis (OA) remains a prevalent disease affecting more than 20% of the global population, resulting in morbidity and lower quality of life for patients. The study of OA pathophysiology remains predominantly in animal models due to the complexities of mimicking the physiological environment surrounding the joint tissue. Recent development in microfluidic organ-on-chip (OoC) systems have demonstrated various techniques to mimic and modulate tissue physiological environments. Adaptations of these techniques have demonstrated success in capturing a joint tissue's tissue physiology for studying the mechanism of OA. Adapting these techniques and strategies can help create human-specific in vitro models that recapitulate the cellular processes involved in OA. This review aims to comprehensively summarise various demonstrations of microfluidic platforms in mimicking joint microenvironments for future platform design iterations.
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Affiliation(s)
- Louis Jun Ye Ong
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Center for Biomedical Technologies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
- Max Planck Queensland Centre (MPQC) for the Materials Science of Extracellular Matrices, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Correspondence: (L.J.Y.O.); (I.P.)
| | - Xiwei Fan
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Center for Biomedical Technologies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
| | - Antonia Rujia Sun
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Center for Biomedical Technologies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
| | - Lin Mei
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Center for Biomedical Technologies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
| | - Yi-Chin Toh
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Center for Biomedical Technologies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
- Max Planck Queensland Centre (MPQC) for the Materials Science of Extracellular Matrices, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Centre for Microbiome Research, Queensland University of Technology, Brisbane City, QLD 4000, Australia
| | - Indira Prasadam
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane City, QLD 4000, Australia
- Center for Biomedical Technologies, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
- Correspondence: (L.J.Y.O.); (I.P.)
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Bursuk Y, Babko A, Savosko S, Serhiienko R, Olifirenko O, Lykhodii V, Kondaurova A. CHANGES IN ARTICULAR CARTILAGE OF THE HIP JOINT INDUCED BY ACETABULAR LABRUM DAMAGE. WIADOMOSCI LEKARSKIE (WARSAW, POLAND : 1960) 2023; 76:1730-1736. [PMID: 37740963 DOI: 10.36740/wlek202308104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/25/2023]
Abstract
OBJECTIVE The aim: Histological studies of hip joint cartilage after articular labrum resection. PATIENTS AND METHODS Materials and methods: Articular labrum of hip joint was excised in adult rabbits. In 1,5 and 4 months, the histology of the joint was studied. The condi¬tion of the cartilage after reverse fixation of labrum was separately investigated. The morphology of the joint was assessed according to the OARSI scale and morphometric measurements. RESULTS Results: The morphology of hip joint cartilage was changed after labrum resection including chondrocyte injury, cell heterogeneity and chondrocyte clus¬tering, less signs of fibrosis. Cartilage erosion was correlated with grade of OARSI scale, but not necessarily with cartilage thickness. The extracellular matrix / chondrocyte ratio was more significant indicator of cartilage condition than multipoint analysis of cartilage thickness. CONCLUSION Conclusions: Injury of acetabular labrum cause change morphology of joint cartilage, which observed in the dynamics. In animal model the cartilage injury scoring scales are more accurate in long term studies while early changes can be interpreted with limitations.
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Affiliation(s)
- Yulian Bursuk
- MEDICAL CENTER "SMALL PRIVATE ENTERPRISE "REHABILITATION", KYIV, UKRAINE; STATE INSTITUTION "INSTITUTE OF TRAUMATOLOGY AND ORTHOPEDICS OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE", KYIV, UKRAINE
| | - Andrii Babko
- STATE INSTITUTION "INSTITUTE OF TRAUMATOLOGY AND ORTHOPEDICS OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE", KYIV, UKRAINE
| | | | - Ruslan Serhiienko
- MEDICAL CENTER "SMALL PRIVATE ENTERPRISE "REHABILITATION", KYIV, UKRAINE
| | - Oleksii Olifirenko
- MEDICAL CENTER "SMALL PRIVATE ENTERPRISE "REHABILITATION", KYIV, UKRAINE; SHUPYK NATIONAL HEALTHCARE UNIVERSITY OF UKRAINE, KYIV, UKRAINE
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Improved Joint Health Following Oral Administration of Glycosaminoglycans with Native Type II Collagen in a Rabbit Model of Osteoarthritis. Animals (Basel) 2022; 12:ani12111401. [PMID: 35681865 PMCID: PMC9179918 DOI: 10.3390/ani12111401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/20/2022] [Accepted: 05/26/2022] [Indexed: 12/20/2022] Open
Abstract
Simple Summary Osteoarthritis is an incurable chronic disease. For this reason, new therapies are constantly emerging to improve clinical signs and the quality of life of our pets. Chondroitin sulfate, glucosamine and hyaluronic acid have been proven effective and are the most widely used in many formulations. In the present study, adding native type II collagen to the combination of chondroitin sulfate, glucosamine and hyaluronic acid showed improvements on osteoarthritis progression in an experimental model of osteoarthritis induced by transection of the cranial cruciate ligament of the knee in New Zealand white rabbits. Disease progression was monitored at different time points using magnetic resonance imaging biomarkers, measurement of hyaluronic acid in synovial fluid, and macroscopic and microscopic evaluations of cartilage, synovial membrane and subchondral bone. Overall, our results showed that adding native type II collagen to a combination of glycosaminoglycans allows a significantly slower osteoarthritis progression, compared to glycosaminoglycans alone. Abstract A prospective, experimental, randomized, double blinded study was designed to evaluate the effects of glycosaminoglycans, with or without native type II collagen (NC), in an osteoarthritis model induced by cranial cruciate ligament transection. The following compounds were tested: chondroitin sulfate (CS), glucosamine hydrochloride (GlHCl), hyaluronic acid (HA) and NC. Fifty-four female 12-week-old New Zealand rabbits were classified into three groups: CTR (control–no treatment), CGH (CS + GlHCl + HA) and CGH-NC (CS + GlHCl + HA + NC). Each group was subdivided into three subgroups according to survival times of 24, 56 and 84 days. Over time, all rabbits developed degenerative changes associated with osteoarthritis. CGH-NC showed significantly improved values on macroscopic evaluation, compared to CTR and CGH. Microscopically, significantly better results were seen with CGH and CGH-NC, compared to CTR, and synovial membrane values were significantly better with CGH-NC compared to CGH. A significant improvement in magnetic resonance imaging biomarkers was also observed with CGH-NC in cartilage transversal relaxation time (T2) and subchondral bone D2D fractal dimension in the lateral condyle. In conclusion, our results show beneficial effects on joint health of CGH and CGH-NC and also supports that adding NC to CGH results in even greater efficacy.
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Huang L, Riihioja I, Tanska P, Ojanen S, Palosaari S, Kröger H, Saarakkala SJ, Herzog W, Korhonen RK, Finnilä MAJ. Early changes in osteochondral tissues in a rabbit model of post-traumatic osteoarthritis. J Orthop Res 2021; 39:2556-2567. [PMID: 33580730 DOI: 10.1002/jor.25009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/23/2020] [Accepted: 02/10/2021] [Indexed: 02/04/2023]
Abstract
Concurrent osteoarthritic (OA) manifestations in bone and cartilage are poorly known. To shed light on this issue, this study aims to investigate changes in subchondral bone and articular cartilage at two time points after anterior cruciate ligament transection (ACLT) in a rabbit model. 2 (N = 16) and 8 (N = 10) weeks after ACLT, the subchondral bone structure, cartilage thickness, Osteoarthritis Research Society International (OARSI) score, fixed charged density (FCD), and collagen orientation angle were analyzed. OA related changes were evaluated by comparing the ACLT to the contralateral (C-L) and control knees. Already 2 weeks after ACLT, higher trabecular number in the medial femoral condyle and femoral groove, greater OARSI score in the femoral condyles, and thinner trabeculae in the lateral tibial plateau and femoral groove were observed in ACLT compared to C-L knees. Only minor changes of cartilage collagen orientation in the femoral condyles and femoral groove and smaller FCD in the femoral condyles, medial tibial plateau, femoral groove and patella were observed. 8 weeks post-ACLT, the surgical knees had thinner subchondral plate and trabeculae, and smaller trabecular bone volume fraction in most of the knee locations. OARSI score was greater in the femoral condyle and lateral tibial plateau cartilage. FCD loss was progressive only in the femoral condyle, femoral groove, and patellar cartilage, and minor changes of cartilage collagen orientation angle were present in the femoral condyles, femoral groove, and lateral tibial plateau. We conclude that ACLT induces progressive subchondral bone loss, during which proteoglycan loss occurs followed by their partly recovery, as indicated by FCD results.
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Affiliation(s)
- Lingwei Huang
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Ilari Riihioja
- Medical Research Center, Bone and Stem Cell Biology Research Group, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Petri Tanska
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Simo Ojanen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.,Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Sanna Palosaari
- Medical Research Center, Bone and Stem Cell Biology Research Group, University of Oulu and Oulu University Hospital, Oulu, Finland.,Cancer and Translational Medicine Research Unit, Anatomy and Cell Biology, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Heikki Kröger
- Department of Orthopedics, Traumatology and Hand Surgery, Kuopio University Hospital, Kuopio, Finland
| | - Simo J Saarakkala
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland.,Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland
| | - Walter Herzog
- Human performance laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.,Biomechanics Laboratory, School of Sports, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Rami K Korhonen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Mikko A J Finnilä
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.,Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland.,Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland
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10
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Mantebea H, Batool S, Hammami M, Xia Y. Structural Morphology of Rabbit Patella and Suprapatella Cartilage by Microscopic MRI and Polarized Light Microscopy. Cartilage 2021; 13:356S-366S. [PMID: 33550833 PMCID: PMC8804843 DOI: 10.1177/1947603521990882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE In order to appreciate the roles articular cartilage of sesamoid bones and sesamoid fibrocartilage play in anatomy and pathology, the articular cartilage of the patella (n = 4) and suprapatella (n = 4) (a sesamoid fibrocartilage) of 12 to 14 weeks old New Zealand rabbits were studied qualitatively and quantitatively. DESIGN/METHOD The intact knee joints and block specimens from the joints were imaged using microscopic magnetic resonance imaging (µMRI) at a 97.6-µm pixel resolution for the former and 19.5-µm resolution for the latter. Histological sections were made out of the µMRI-imaged specimens, which were imaged using polarized light microscopy (PLM) at 0.25-, 1-, and 4-µm pixel resolutions. RESULTS The patella cartilage varied in thickness across the medial to lateral ends of the sesamoid bone with the central medial aspect slightly thicker than the lateral aspect. The suprapatella fibrocartilage decreased proximally away from the knee joint. Quantitative results of patellar cartilage showed strong dependence of fiber orientation with the tissue depth. Three histological zones can be clearly observed, which are similar to articular cartilage from other large animals. The sesamoid fibrocartilage has one thin surface layer (10 µm thick) of parallel-arranged structured fibers followed immediately by the majority of random fibers in bulk tissue. T2 relaxation time anisotropy was observed in the patellar cartilage but not in the bulk fibrocartilage. CONCLUSION Given the different functions of these 2 different types of cartilages in joint motion, these quantitative results will be beneficial to future studies of joint diseases using rabbits as the animal model.
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Affiliation(s)
| | | | | | - Yang Xia
- Oakland University, Rochester, MI,
USA
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11
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Samvelyan HJ, Hughes D, Stevens C, Staines KA. Models of Osteoarthritis: Relevance and New Insights. Calcif Tissue Int 2021; 109:243-256. [PMID: 32062692 PMCID: PMC8403120 DOI: 10.1007/s00223-020-00670-x] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 02/05/2020] [Indexed: 12/31/2022]
Abstract
Osteoarthritis (OA) is a progressive and disabling musculoskeletal disease affecting millions of people and resulting in major healthcare costs worldwide. It is the most common form of arthritis, characterised by degradation of the articular cartilage, formation of osteophytes, subchondral sclerosis, synovial inflammation and ultimate loss of joint function. Understanding the pathogenesis of OA and its multifactorial aetiology will lead to the development of effective treatments, which are currently lacking. Two-dimensional (2D) in vitro tissue models of OA allow affordable, high-throughput analysis and stringent control over specific variables. However, they are linear in fashion and are not representative of physiological conditions. Recent in vitro studies have adopted three-dimensional (3D) tissue models of OA, which retain the advantages of 2D models and are able to mimic physiological conditions, thereby allowing investigation of additional variables including interactions between the cells and their surrounding extracellular matrix. Numerous spontaneous and induced animal models are used to reproduce the onset and monitor the progression of OA based on the aetiology under investigation. This therefore allows elucidation of the pathogenesis of OA and will ultimately enable the development of novel and specific therapeutic interventions. This review summarises the current understanding of in vitro and in vivo OA models in the context of disease pathophysiology, classification and relevance, thus providing new insights and directions for OA research.
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Affiliation(s)
| | - David Hughes
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Edinburgh, UK
| | - Craig Stevens
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Edinburgh, UK
| | - Katherine Ann Staines
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Edinburgh, UK.
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12
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Li Y, Feng R, Liu X, Wang G, Wang W, Lu Q, Huang W, Wu H, Cai X. A Post-Traumatic Osteoarthritic Model of Hip Following Fracture of Acetabulum in Rabbit: A Preliminary Study by Macroscopic and Radiographic Assessment. Orthop Surg 2021; 13:296-305. [PMID: 33398932 PMCID: PMC7862151 DOI: 10.1111/os.12882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/07/2020] [Accepted: 10/26/2020] [Indexed: 01/31/2023] Open
Abstract
Objective To develop a post‐traumatic osteoarthritic model of hip following fracture of acetabulum in rabbit for revealing biochemical mechanism of post‐traumatic osteoarthritis. Methods A total of 36 mature male New Zealand white rabbits were equally divided into sham group (n = 12), non‐ORIF group (n = 12), and open reduction and internal fixation (ORIF) group (n = 12). Except for the sham group, rabbits had survival surgeries to create acetabular fractures of dorsal wall for simulating dashboard impaction mechanism. The ORIF group received open reduction and internal fixation, while fractures in the non‐ORIF group were left as displaced but transverse fracture and dislocation was reduced. Besides intraoperative appearance and postoperative recovery, macroscopic and radiographic characteristics of the hips were recorded and assessed by a radiographic scoring scale at 3 weeks, 6 weeks, and 6 months, respectively. Results Out of 24 modeled acetabula, 21 (87.5%) were pure dorsal wall fractures as proposed and the remaining three were associated fractures (dorsal wall plus transverse fracture) accompanied by dorsal dislocation or not. All hips were stable, and no sciatic nerve injury was observed. One rabbit in the ORIF group died of deep infection 4 days after surgery. Rabbits in the sham and ORIF groups returned to normal gait in 2 weeks, but animals in the non‐ORIF group suffered from limping and restricted movement. As the time progressed, the hips in the non‐ORIF group experienced progressive and severe degeneration which exhibited dramatically malformed and hypertrophic joints at 6 months, but the ORIF group maintained much better morphological structure. Corresponding to morphological changes, the average radiographic scores of the non‐ORIF group increased from 1.25 at 3 weeks to 2.75 at 6 months and showed statistically significant difference when compared to the sham group at all three time points (P = 0.011, 0.011, 0.015, respectively, <0.0167). Although the scores of the ORIF group showed apparent improvements (increased from 0.67 at 3 weeks to 2.00 at 6 months), there was no significant difference between the two modeled groups at all three time points. Conclusion The fracture model with high consistency and reproducibility showed progressive post‐traumatic osteoarthritic changes which could be improved by open reduction and internal fixation surgery and provided an alternative selection for investigating potential pathogenesis and pathology of post‐traumatic osteoarthritis following fracture of acetabulum.
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Affiliation(s)
- Yanjin Li
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, China.,Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China.,Department of Orthopedics, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, China
| | - Ruibing Feng
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, China.,Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China
| | - Ximing Liu
- Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China
| | - Guodong Wang
- Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China
| | - Wei Wang
- Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China.,Department of Orthopedics, Hubei Province hospital of Traditional Chinese Medicine, Wuhan, China
| | - Qilin Lu
- Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China.,Department of Spine Surgery, Hubei 672 Orthopaedics Hospital of Integrated Chinese & Western Medicine, Wuhan, China
| | - Wei Huang
- Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China.,Department of Spine Surgery, Jingmen NO.2 People's Hospital, Jingmen, China
| | - Haiyang Wu
- Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China
| | - Xianhua Cai
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, China.,Department of Orthopaedic Surgery, PLA Middle Military Command General Hospital, Wuhan, China
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13
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Meng X, Grad S, Wen C, Lai Y, Alini M, Qin L, Wang X. An impaired healing model of osteochondral defect in papain-induced arthritis. J Orthop Translat 2020; 26:101-110. [PMID: 33437629 PMCID: PMC7773975 DOI: 10.1016/j.jot.2020.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 07/15/2020] [Accepted: 07/21/2020] [Indexed: 11/16/2022] Open
Abstract
Background Osteochondral defects (OCD) are common in osteoarthritis (OA) and difficult to heal. Numerous tissue engineering approaches and novel biomaterials are developed to solve this challenging condition. Although most of the novel methods can successfully treat osteochondral defects in preclinical trials, their clinical application in OA patients is not satisfactory, due to a high spontaneous recovery rate of many preclinical animal models by ignoring the inflammatory environment. In this study, we developed a sustained osteochondral defect model in osteoarthritic rabbits and compared the cartilage and subchondral bone regeneration in normal and arthritic environments. Methods Rabbits were injected with papain (1.25%) in the right knee joints (OA group), and saline in the left knee joints (Non-OA group) at day 1 and day 3. One week later a cylindrical osteochondral defect of 3.2 mm in diameter and 3 mm depth was made in the femoral patellar groove. After 16 weeks, newly regenerated cartilage and bone inside the defect were evaluated by micro-CT, histomorphology and immunohistochemistry. Results One week after papain injection, extracellular matrix in the OA group demonstrated dramatically less safranin O staining intensity than in the non-OA group. Until 13 weeks of post-surgery, knee width remained significantly higher in the OA group than the non-OA control group. Sixteen weeks after surgery, the OA group had 11.3% lower International Cartilage Regeneration and Joint Preservation Society score and 32.5% lower O’Driscoll score than the non-OA group. There were less sulfated glycosaminoglycan and type II collagen but 74.1% more MMP-3 protein in the regenerated cartilage of the OA group compared with the non-OA group. As to the regenerated bone, bone volume fraction, trabecular thickness and trabecular number were all about 28% lower, while the bone mineral density was 26.7% higher in the OA group compared to the non-OA group. Dynamic histomorphometry parameters including percent labeled perimeter, mineral apposition rate and bone formation rate were lower in the OA group than in the non-OA group. Immunohistochemistry data showed that the OA group had 15.9% less type I collagen than the non-OA group. Conclusion The present study successfully established a non-self-healing osteochondral defect rabbit model in papain-induced OA, which was well simulating the clinical feature and pathology. In addition, we confirmed that both cartilage and subchondral bone regeneration were further impaired in arthritic environment. The translational potential of this article The present study provides an osteochondral defect in a small osteoarthritic model. This non-self-healing model and the evaluation protocol could be used to evaluate the efficacy and study the mechanism of newly developed biomaterials or tissue engineering methods preclinically; as methods tested in reliable preclinical models are expected to achieve improved success rate when tested clinically for treatment of OCD in OA patients.
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Affiliation(s)
- Xiangbo Meng
- Translational Medicine R&D Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,CAS-HK Joint Lab of Biomaterials, Joint Laboratory of Chinese Academic of Science and Hong Kong for Biomaterials, Translational Medicine Research and Development Center, Shenzhen Institutes of Advanced Technology of Chinese Academy of Sciences and the Chinese University of Hong Kong, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Sibylle Grad
- AO Research Institute Davos, Clavadelerstrasse 8, Davos Platz, 7270, Switzerland
| | - Chunyi Wen
- Interdisciplinary Division of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Yuxiao Lai
- Translational Medicine R&D Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,CAS-HK Joint Lab of Biomaterials, Joint Laboratory of Chinese Academic of Science and Hong Kong for Biomaterials, Translational Medicine Research and Development Center, Shenzhen Institutes of Advanced Technology of Chinese Academy of Sciences and the Chinese University of Hong Kong, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, Davos Platz, 7270, Switzerland
| | - Ling Qin
- Translational Medicine R&D Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China.,CAS-HK Joint Lab of Biomaterials, Joint Laboratory of Chinese Academic of Science and Hong Kong for Biomaterials, Translational Medicine Research and Development Center, Shenzhen Institutes of Advanced Technology of Chinese Academy of Sciences and the Chinese University of Hong Kong, China
| | - Xinluan Wang
- Translational Medicine R&D Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China.,CAS-HK Joint Lab of Biomaterials, Joint Laboratory of Chinese Academic of Science and Hong Kong for Biomaterials, Translational Medicine Research and Development Center, Shenzhen Institutes of Advanced Technology of Chinese Academy of Sciences and the Chinese University of Hong Kong, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
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14
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Kim YG, Choi J, Kim K. Mesenchymal Stem Cell‐Derived Exosomes for Effective Cartilage Tissue Repair and Treatment of Osteoarthritis. Biotechnol J 2020; 15:e2000082. [DOI: 10.1002/biot.202000082] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/25/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Young Guk Kim
- Department of Chemical and Biochemical Engineering Dongguk University 30 Pildong‐ro 1‐gil Seoul 04620 Republic of Korea
| | - Jonghoon Choi
- School of Integrative Engineering Chung‐Ang University 47 Heukseok‐ro Seoul 06911 Republic of Korea
| | - Kyobum Kim
- Department of Chemical and Biochemical Engineering Dongguk University 30 Pildong‐ro 1‐gil Seoul 04620 Republic of Korea
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15
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Batool S, Mahar R, Badar F, Tetmeyer A, Xia Y. Quantitative µMRI and PLM study of rabbit humeral and femoral head cartilage at sub-10 µm resolutions. J Orthop Res 2020; 38:1052-1062. [PMID: 31799697 PMCID: PMC7162717 DOI: 10.1002/jor.24547] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 11/30/2019] [Indexed: 02/04/2023]
Abstract
This study aimed to establish the baseline characteristics in humeral and femoral cartilage in rabbit, using quantitative magnetic resonance imaging (MRI) relaxation times (T2, T1ρ, and T1) at 9.75 and 70-82 µm pixel resolutions, and quantitative polarized light microscopy (PLM) measures (retardation, angle) at 1.0 and 4.0 µm pixel resolutions. Five intact (i.e., unopened) shoulder joints (the scapula and humeral heads) and three femoral heads of the hip joints from five healthy rabbits were imaged in MRI at 70-82 µm resolution. Thirteen cartilage-bone specimens were harvested from these joints and imaged in µMRI at 9.75 µm resolution. Subsequently, quantitative PLM study of these specimens enabled the examination of the fibril orientation and organization in both intact joints and individual specimens. Quantitative MRI relaxation data and PLM fibril structural data show distinct features in tissue properties at different depths of cartilage, different in individual histological zones. The thicknesses of the histological zones in µMRI and PLM were successfully obtained. This is the first correlated and quantitative MRI and PLM study of rabbit cartilage at sub-10 µm resolutions, which benefits future investigation of osteoarthritis using the rabbit model. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:1052-1062, 2020.
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Affiliation(s)
| | | | | | | | - Yang Xia
- Corresponding Author and Address: Yang Xia, Ph.D., Department of Physics, Oakland University, 244 Meadow Brook Road, Rochester, Michigan 48309, USA, Phone: (248) 370-3420, Fax: (248) 370-3408,
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16
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Saraswat R, Ratnayake I, Perez EC, Schutz WM, Zhu Z, Ahrenkiel SP, Wood ST. Micropatterned Biphasic Nanocomposite Platform for Maintaining Chondrocyte Morphology. ACS APPLIED MATERIALS & INTERFACES 2020; 12:14814-14824. [PMID: 32202764 DOI: 10.1021/acsami.9b22596] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One major limitation hindering the translation of in vitro osteoarthritis research into clinical disease-modifying therapies is that chondrocytes rapidly spread and dedifferentiate under standard monolayer conditions. Current strategies to maintain rounded morphologies of chondrocytes in culture either unnaturally restrict adhesion and place chondrocytes in an excessively stiff mechanical environment or are impractical for use in many applications. To address the limitations of current techniques, we have developed a unique composite thin-film cell culture platform, the CellWell, to model articular cartilage that utilizes micropatterned hemispheroidal wells, precisely sized to fit individual cells (12-18 μm diameters), to promote physiologically spheroidal chondrocyte morphologies while maintaining compatibility with standard cell culture and analytical techniques. CellWells were constructed of 15-μm-thick 5% agarose films embedded with electrospun poly(vinyl alcohol) (PVA) nanofibers. Transmission electron microscope (TEM) images of PVA nanofibers revealed a mean diameter of 60.9 ± 24 nm, closely matching the observed 53.8 ± 29 nm mean diameter of human ankle collagen II fibers. Using AFM nanoindentation, CellWells were found to have compressive moduli of 158 ± 0.60 kPa at 15 μm/s indentation, closely matching published stiffness values of the native pericellular matrix. Primary human articular chondrocytes taken from ankle cartilage were seeded in CellWells and assessed at 24 h. Chondrocytes maintained their rounded morphology in CellWells (mean aspect ratio of 0.87 ± 0.1 vs three-dimensional (3D) control [0.86 ± 0.1]) more effectively than those seeded under standard conditions (0.65 ± 0.3), with average viability of >85%. The CellWell's design, with open, hemispheroidal wells in a thin film substrate of physiological stiffness, combines the practical advantages of two-dimensional (2D) culture systems with the physiological advantages of 3D systems. Through its ease of use and ability to maintain the physiological morphology of chondrocytes, we expect that the CellWell will enhance the clinical translatability of future studies conducted using this culture platform.
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Affiliation(s)
- Ram Saraswat
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - Ishara Ratnayake
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - E Celeste Perez
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - William M Schutz
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - Zhengtao Zhu
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
- Chemistry and Applied Biological Sciences, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - S Phillip Ahrenkiel
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - Scott T Wood
- Nanoscience and Nanoengineering, South Dakota School of Mines & Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
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17
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Bascuñán AL, Biedrzycki A, Banks SA, Lewis DD, Kim SE. Large Animal Models for Anterior Cruciate Ligament Research. Front Vet Sci 2019; 6:292. [PMID: 31555675 PMCID: PMC6727067 DOI: 10.3389/fvets.2019.00292] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 08/15/2019] [Indexed: 12/13/2022] Open
Abstract
Large animal (non-rodent mammal) models are commonly used in ACL research, but no species is currently considered the gold standard. Important considerations when selecting a large animal model include anatomical differences, the natural course of ACL pathology in that species, and biomechanical differences between humans and the chosen model. This article summarizes recent reports related to anatomy, pathology, and biomechanics of the ACL for large animal species (dog, goat, sheep, pig, and rabbit) commonly used in ACL research. Each species has unique features and benefits as well as potential drawbacks, which are highlighted in this review. This information may be useful in the selection process when designing future studies.
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Affiliation(s)
- Ana Luisa Bascuñán
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, United States
| | - Adam Biedrzycki
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, United States
| | - Scott A Banks
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, United States
| | - Daniel D Lewis
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, United States
| | - Stanley E Kim
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, United States
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18
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Abstract
Osteoarthritis (OA) affects the synovial joint. Animal models commonly used to study the disease and its therapeutic treatment are generally spontaneous or induced. The lack of an animal model representing all types of existing OA requires knowledge about what can be expected from each species and their limitations. The choice of species is crucial, as the selection of the age of individuals at the start of a study, their sex, and nutritional and environmental conditions. A better understanding of the small mammal models used for the study of osteoarthritic pathology may benefit both researcher and clinician dealing with these animals.
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Affiliation(s)
- C Iván Serra
- Department of Animal Medicine and Surgery, UCV Veterinary Hospital, Faculty of Veterinary and Experimental Sciences, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain.
| | - Carme Soler
- Department of Animal Medicine and Surgery, UCV Veterinary Hospital, Faculty of Veterinary and Experimental Sciences, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain
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19
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Bei M, Tian F, Liu N, Zheng Z, Cao X, Zhang H, Wang Y, Xiao Y, Dai M, Zhang L. A Novel Rat Model of Patellofemoral Osteoarthritis Due to Patella Baja, or Low-Lying Patella. Med Sci Monit 2019; 25:2702-2717. [PMID: 30979862 PMCID: PMC6476235 DOI: 10.12659/msm.915018] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background Patella baja, or patella infera, consists of a low-lying patella that results in a limited range of motion, joint pain, and crepitations. Patellofemoral joint osteoarthritis (PFJOA) is a subtype OA of the knee. This study aimed to develop a reproducible and reliable rat model of PFJOA. Material/Methods Three-month-old female Sprague-Dawley rats (n=24) included a baseline group (n=8) that were euthanized at the beginning of the study. The sham group (n=8), and the patella ligament shortening (PLS) group (n=8) were euthanized and evaluated at ten weeks. The PLS model group (n=8) underwent insertion of a Kirschner wire under the patella tendon to induce patella baja. At ten weeks, the sham group and the PLS group were compared using X-ray imaging, macroscopic appearance, histology, immunohistochemistry, TUNEL staining for apoptosis, and micro-computed tomography (micro-CT). The patella height was determined using the modified Insall-Salvati (MIS) ratio. Results The establishment of the rat model of patella baja in the PLS group at ten weeks was confirmed by X-ray. In the PLS group, patella volume, sagittal length, and cross-sectional area were significantly increased compared with the sham group. The PFJ showed typical lesions of OA, confirmed macroscopically and histologically. Compared with the sham group, in the rat model of PFJOA, there was increased cell apoptosis, and immunohistochemistry showed increased expression of biomarkers of osteoarthritis, compared with the sham group. Conclusions A rat model of PFJOA was developed that was confirmed by changes in cartilage and subchondral bone.
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Affiliation(s)
- Mingjian Bei
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Faming Tian
- Meical Research Center, North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Ning Liu
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Zhiyuan Zheng
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Xuehui Cao
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Hongfei Zhang
- Meical Research Center, North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Yudan Wang
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Yaping Xiao
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, China (mainland)
| | - Muwei Dai
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Liu Zhang
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, China (mainland).,Department of Orthopedic Surgery, Meitan General Hospital, Beijing, China (mainland)
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20
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Cope P, Ourradi K, Li Y, Sharif M. Models of osteoarthritis: the good, the bad and the promising. Osteoarthritis Cartilage 2019; 27:230-239. [PMID: 30391394 PMCID: PMC6350005 DOI: 10.1016/j.joca.2018.09.016] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 08/30/2018] [Accepted: 09/13/2018] [Indexed: 02/02/2023]
Abstract
Osteoarthritis (OA) is a chronic degenerative disease of diarthrodial joints most commonly affecting people over the age of forty. The causes of OA are still unknown and there is much debate in the literature as to the exact sequence of events that trigger the onset of the heterogeneous disease we recognise as OA. There is currently no consensus model for OA that naturally reflects human disease. Existing ex-vivo models do not incorporate the important inter-tissue communication between joint components required for disease progression and differences in size, anatomy, histology and biomechanics between different animal models makes translation to the human model very difficult. This narrative review highlights the advantages and disadvantages of the current models used to study OA. It discusses the challenges of producing a more reliable OA-model and proposes a direction for the development of a consensus model that reflects the natural environment of human OA. We suggest that a human osteochondral plug-based model may overcome many of the fundamental limitations associated with animal and in-vitro models based on isolated cells. Such a model will also provide a platform for the development and testing of targeted treatment and validation of novel OA markers directly on human tissues.
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Affiliation(s)
| | | | | | - M. Sharif
- Address correspondence and reprint requests to: M. Sharif, Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Learning and Research Building level 2, Southmead Hospital, Bristol, BS10 5NB, UK. Tel: 44-117-414-7926.
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21
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Chan DD, Cai L, Butz KD, Nauman EA, Dickerson DA, Jonkers I, Neu CP. Functional MRI can detect changes in intratissue strains in a full thickness and critical sized ovine cartilage defect model. J Biomech 2018; 66:18-25. [PMID: 29169631 PMCID: PMC5767131 DOI: 10.1016/j.jbiomech.2017.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/02/2017] [Accepted: 10/27/2017] [Indexed: 02/07/2023]
Abstract
Functional imaging of tissue biomechanics can reveal subtle changes in local softening and stiffening associated with disease or repair, but noninvasive and nondestructive methods to acquire intratissue measures in well-defined animal models are largely lacking. We utilized displacement encoded MRI to measure changes in cartilage deformation following creation of a critical-sized defect in the medial femoral condyle of ovine (sheep) knees, a common in situ and large animal model of tissue damage and repair. We prioritized visualization of local, site-specific variation and changes in displacements and strains following defect placement by measuring spatial maps of intratissue deformation. Custom data smoothing algorithms were developed to minimize propagation of noise in the acquired MRI phase data toward calculated displacement or strain, and to improve strain measures in high aspect ratio tissue regions. Strain magnitudes in the femoral, but not tibial, cartilage dramatically increased in load-bearing and contact regions especially near the defect locations, with an average 6.7% ± 6.3%, 13.4% ± 10.0%, and 10.0% ± 4.9% increase in first and second principal strains, and shear strain, respectively. Strain heterogeneity reflected the complexity of the in situ mechanical environment within the joint, with multiple tissue contacts defining the deformation behavior. This study demonstrates the utility of displacement encoded MRI to detect increased deformation patterns and strain following disruption to the cartilage structure in a clinically-relevant, large animal defect model. It also defines imaging biomarkers based on biomechanical measures, in particular shear strain, that are potentially most sensitive to evaluate damage and repair, and that may additionally translate to humans in future studies.
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Affiliation(s)
- Deva D Chan
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, United States; Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, United States
| | - Luyao Cai
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Kent D Butz
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Eric A Nauman
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, United States; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, United States; BioRegeneration Technologies, Inc., West Lafayette, IN 47907, United States
| | - Darryl A Dickerson
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, United States; BioRegeneration Technologies, Inc., West Lafayette, IN 47907, United States
| | - Ilse Jonkers
- Kinesiology Department, KU Leuven, Leuven, Belgium
| | - Corey P Neu
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, United States; Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, United States.
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22
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Peters ST, Wilke M, Schmid T. Arthroscopic approach and anatomy of the stifle joint in the rabbit. Vet Surg 2017; 47:130-135. [PMID: 28990676 DOI: 10.1111/vsu.12727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 04/18/2017] [Accepted: 05/18/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To describe a technique and normal findings for arthroscopy of the stifle in rabbits. STUDY DESIGN Cadaver study. ANIMALS Twenty cadaveric stifles from New Zealand White rabbits were examined. METHODS The arthroscope was placed through a medial portal, and instrument portals were created on the lateral aspect of the joint. The same portals were used for examination of the entire joint and palpation of structures with a probe. RESULTS Structures identified in the proximal aspect of the stifle included the suprapatellar pouch, suprapatella, patella, medial and lateral proximal recesses, medial and lateral trochlear ridges, trochlear groove. Structures identified in the distal aspect of the joint included the cranial and caudal cruciate ligaments, medial and lateral menisci, medial and lateral femoral condyles, the long digital extensor tendon, and the cranial meniscal ligaments were identified. All of the proximal structures could be seen in 16/20 limbs. Distally, the cranial cruciate ligament could be identified and manipulated most often (17/20 limbs), followed by the caudal cruciate ligament (11/20), the menisci (9/20), and condyles (9/20). The average examination time was 27 minutes. There was a variably present femorotibial membrane. CONCLUSION We conclude that the arthoscopic evaluation of the stifle in rabbits is a viable surgical approach and could be used for rabbit models or to examine clinical cases with stifle pathology. Precise portal placement and adequate infrapatellar fat pad debridement were critical for success.
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Bauer C, Jeyakumar V, Niculescu-Morzsa E, Kern D, Nehrer S. Hyaluronan thiomer gel/matrix mediated healing of articular cartilage defects in New Zealand White rabbits-a pilot study. J Exp Orthop 2017; 4:14. [PMID: 28470629 PMCID: PMC5415448 DOI: 10.1186/s40634-017-0089-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/27/2017] [Indexed: 11/13/2022] Open
Abstract
Background Articular cartilage defects are limited to their regenerative potential in human adults. Our current study evaluates tissue regeneration in a surgically induced empty defect site with hyaluronan thiomer as a provisional scaffold in a gel/matrix combination without cells on rabbit models to restore tissue formation. Methods An osteochondral defect of 4 mm in diameter and 5 mm in depth was induced by mechanical drilling in the femoral center of the trochlea in 18 New Zealand White rabbits. Previously evaluated from an in vitro study hyaluronan thiomer matrix, and a hyaluronan thiomer gel was used to treat the defect. As a control, the defect was left untreated. During the whole study, rabbits were clinically examined and after 4 (n = 3) or 12 (n = 3) weeks, the rabbits were sacrificed. Joints were evaluated macroscopically (Brittberg score) and by histology (O’Driscoll score). Synovial cells from the synovial fluid smear were histopathologically evaluated. Results The healing of the defects varied intra-group wise at the first observation period. After 12 weeks the results concerning the cartilage repair score were inhomogeneous within each group, while the macroscopic analysis was more homogenous. In the synovial fluid smear, the mean score of infiltrated synovial and non-synovial cells was slightly increased after 4 weeks and slightly decreased after 12 weeks in both the treatment groups in comparison to the untreated control. Conclusions Taken together with results from the in vivo study indicated that implantation of hyaluronan thiomer as a combination of gel and matrix might enhance articular cartilage regeneration in an empty defect. Despite their benefits, the intrinsic healing capacity of New Zealand rabbits is a limitation for comparative test subject in pre-clinical models of cartilage defects.
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Affiliation(s)
- Christoph Bauer
- Center for Regenerative Medicine and Orthopedics, Department for Health Sciences and Biomedicine, Danube-University Krems, Dr.-Karl-Dorrek-Strasse 30, Krems, Austria.
| | - Vivek Jeyakumar
- Center for Regenerative Medicine and Orthopedics, Department for Health Sciences and Biomedicine, Danube-University Krems, Dr.-Karl-Dorrek-Strasse 30, Krems, Austria
| | - Eugenia Niculescu-Morzsa
- Center for Regenerative Medicine and Orthopedics, Department for Health Sciences and Biomedicine, Danube-University Krems, Dr.-Karl-Dorrek-Strasse 30, Krems, Austria
| | - Daniela Kern
- Center for Regenerative Medicine and Orthopedics, Department for Health Sciences and Biomedicine, Danube-University Krems, Dr.-Karl-Dorrek-Strasse 30, Krems, Austria
| | - Stefan Nehrer
- Center for Regenerative Medicine and Orthopedics, Department for Health Sciences and Biomedicine, Danube-University Krems, Dr.-Karl-Dorrek-Strasse 30, Krems, Austria
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Kol A, Arzi B, Athanasiou KA, Farmer DL, Nolta JA, Rebhun RB, Chen X, Griffiths LG, Verstraete FJM, Murphy CJ, Borjesson DL. Companion animals: Translational scientist's new best friends. Sci Transl Med 2016; 7:308ps21. [PMID: 26446953 DOI: 10.1126/scitranslmed.aaa9116] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Knowledge and resources derived from veterinary medicine represent an underused resource that could serve as a bridge between data obtained from diseases models in laboratory animals and human clinical trials. Naturally occurring disease in companion animals that display the defining attributes of similar, if not identical, diseases in humans hold promise for providing predictive proof of concept in the evaluation of new therapeutics and devices. Here we outline comparative aspects of naturally occurring diseases in companion animals and discuss their current uses in translational medicine, benefits, and shortcomings. Last, we envision how these natural models of disease might ultimately decrease the failure rate in human clinical trials and accelerate the delivery of effective treatments to the human clinical market.
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Affiliation(s)
- Amir Kol
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Boaz Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Kyriacos A Athanasiou
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616, U.S.A. Department of Orthopedic Surgery, School of Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Diana L Farmer
- Department of Surgery, School of Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Jan A Nolta
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, CA 95616, USA. Department of Internal Medicine, School of Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Robert B Rebhun
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Xinbin Chen
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA. Department of Internal Medicine, School of Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Leigh G Griffiths
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Frank J M Verstraete
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Christopher J Murphy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA. Department of Ophthalmology and Vision Science, School of Medicine, University of California, Davis, Davis, CA 95616, USA
| | - Dori L Borjesson
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA.
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25
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Civitarese D, Donahue TLH, LaPrade CM, Saroki AJ, Moulton SG, Schon JM, LaPrade RF. Qualitative and quantitative measurement of the anterior and posterior meniscal root attachments of the New Zealand white rabbit. J Exp Orthop 2016; 3:10. [PMID: 26928558 PMCID: PMC4771646 DOI: 10.1186/s40634-016-0046-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 02/24/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The purpose of this study was to quantify the meniscal root anatomy of the New Zealand white rabbit to better understand this animal model for future in vitro and in vivo joint degeneration studies. METHODS Ten non-paired fresh frozen New Zealand white rabbit knee stifle joints were carefully disarticulated for this study. Measurements were made for all bony landmarks and ligamentous structure attachment sites on the tibial plateau. The following soft tissue structures were consistently identified in the rabbit stifle joint: the anterior root attachment of the lateral meniscus, the anterior root attachment of the medial meniscus, the anterior cruciate ligament, the posterior root attachment of the medial meniscus, the ligament of Wrisberg, the posterior cruciate ligament, and the posterior meniscotibial ligament. The following bony landmarks were consistently identified: the extensor digitorum longus groove, the medial tibial eminence, the center of the tibial tuberosity, and the lateral tibial eminence. RESULTS The center of the anterior cruciate ligament and the medial tibial eminence apex were found to be 3.4 ± 0.3 mm (2.9-3.6) and 6.1 ± 0.6 mm (5.1-7.0) respectively from the center of the medical anterior root attachment. The center of the anterior cruciate ligament and the lateral tibial eminence apex were found to be 2.1 ± 0.5 mm (1.2-2.7) and 7.0 ± 0.6 mm (6.4-8.2) respectively from the center of the lateral anterior root attachment. The center of the posterior cruciate ligament and the medial tibial eminence apex were found to be 2.0 ± 0.7 mm (0.5-2.6) and 1.8 ± 0.4 mm (1.2-2.4) respectively from the center of the medial posterior root attachment. CONCLUSIONS This study augments our understanding of the comparative anatomy of the rabbit stifle joint. This information will be useful for future biomechanical, surgical, and in vitro studies utilizing the rabbit stifle as a model for human knee joint degenerative diseases.
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Affiliation(s)
- David Civitarese
- Department of Biomedical Engineering, Steadman Philippon Research Institute, 181 West Meadow Drive Suite 1000, Vail, CO, 81657, USA.
| | - Tammy L Haut Donahue
- Department of Mechanical Engineering, Colorado State University, Building A106 Engineering, Fort Collins, CO, 80523, USA.
| | - Christopher M LaPrade
- Department of Biomedical Engineering, Steadman Philippon Research Institute, 181 West Meadow Drive Suite 1000, Vail, CO, 81657, USA.
| | - Adriana J Saroki
- Department of Biomedical Engineering, Steadman Philippon Research Institute, 181 West Meadow Drive Suite 1000, Vail, CO, 81657, USA.
| | - Samuel G Moulton
- Department of Biomedical Engineering, Steadman Philippon Research Institute, 181 West Meadow Drive Suite 1000, Vail, CO, 81657, USA.
| | - Jason M Schon
- Department of Biomedical Engineering, Steadman Philippon Research Institute, 181 West Meadow Drive Suite 1000, Vail, CO, 81657, USA.
| | - Robert F LaPrade
- Department of Biomedical Engineering, Steadman Philippon Research Institute, 181 West Meadow Drive Suite 1000, Vail, CO, 81657, USA. .,The Steadman Clinic, 181 West Meadow Drive Suite 400, Vail, CO, 81657, USA.
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26
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Kuyinu EL, Narayanan G, Nair LS, Laurencin CT. Animal models of osteoarthritis: classification, update, and measurement of outcomes. J Orthop Surg Res 2016; 11:19. [PMID: 26837951 PMCID: PMC4738796 DOI: 10.1186/s13018-016-0346-5] [Citation(s) in RCA: 347] [Impact Index Per Article: 43.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 01/11/2016] [Indexed: 12/13/2022] Open
Abstract
Osteoarthritis (OA) is one of the most commonly occurring forms of arthritis in the world today. It is a debilitating chronic illness causing pain and immense discomfort to the affected individual. Significant research is currently ongoing to understand its pathophysiology and develop successful treatment regimens based on this knowledge. Animal models have played a key role in achieving this goal. Animal models currently used to study osteoarthritis can be classified based on the etiology under investigation, primary osteoarthritis, and post-traumatic osteoarthritis, to better clarify the relationship between these models and the pathogenesis of the disease. Non-invasive animal models have shown significant promise in understanding early osteoarthritic changes. Imaging modalities play a pivotal role in understanding the pathogenesis of OA and the correlation with pain. These imaging studies would also allow in vivo surveillance of the disease as a function of time in the animal model. This review summarizes the current understanding of the disease pathogenesis, invasive and non-invasive animal models, imaging modalities, and pain assessment techniques in the animals.
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Affiliation(s)
- Emmanuel L Kuyinu
- Institute for Regenerative Engineering, University of Connecticut Health, Farmington, CT, USA. .,Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT, USA. .,Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA.
| | - Ganesh Narayanan
- Institute for Regenerative Engineering, University of Connecticut Health, Farmington, CT, USA. .,Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT, USA. .,Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA.
| | - Lakshmi S Nair
- Institute for Regenerative Engineering, University of Connecticut Health, Farmington, CT, USA. .,Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT, USA. .,Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA. .,Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA. .,Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, USA. .,Institute of Materials Science, University of Connecticut, Storrs, CT, USA.
| | - Cato T Laurencin
- Institute for Regenerative Engineering, University of Connecticut Health, Farmington, CT, USA. .,Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT, USA. .,Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA. .,Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA. .,Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, USA. .,Institute of Materials Science, University of Connecticut, Storrs, CT, USA. .,Department of Craniofacial Sciences, School of Dental Medicine, University of Connecticut Health, Farmington, CT, USA. .,Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT, USA.
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Abstract
Osteoarthritis (OA) is unquestionably one of the most important chronic health issues in humans, affecting millions of individuals and costing billions of dollars annually. Despite widespread awareness of this disease and its devastating impact, the pathogenesis of early OA is not completely understood, hampering the development of effective tools for early diagnosis and disease-modifying therapeutics. Most human tissue available for study is obtained at the time of joint replacement, when OA lesions are end stage and little can be concluded about the factors that played a role in disease development. To overcome this limitation, over the past 50 years, numerous induced and spontaneous animal models have been utilized to study disease onset and progression, as well as to test novel therapeutic interventions. Reflecting the heterogeneity of OA itself, no single "gold standard" animal model for OA exists; thus, a challenge for researchers lies in selecting the most appropriate model to answer a particular scientific question of interest. This review provides general considerations for model selection, as well as important features of species such as mouse, rat, guinea pig, sheep, goat, and horse, which researchers should be mindful of when choosing the "best" animal model for their intended purpose. Special consideration is given to key variations in pathology among species as well as recommended guidelines for reporting the histologic features of each model.
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Affiliation(s)
- A M McCoy
- Department of Veterinary Clinical Medicine, University of Illinois, Urbana, IL, USA
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28
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Pelletier JP, Kapoor M, Martel-Pelletier J. Animal models of osteoarthritis. Rheumatology (Oxford) 2015. [DOI: 10.1016/b978-0-323-09138-1.00174-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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29
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Arzi B, Kol A, Murphy B, Walker NJ, Wood JA, Clark K, Verstraete FJM, Borjesson DL. Feline foamy virus adversely affects feline mesenchymal stem cell culture and expansion: implications for animal model development. Stem Cells Dev 2014; 24:814-23. [PMID: 25404388 DOI: 10.1089/scd.2014.0317] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are a promising therapeutic option for various immune-mediated and inflammatory disorders due to their potent immunomodulatory and trophic properties. Naturally occurring diseases in large animal species may serve as surrogate animal models of human disease, as they may better reflect the complex genetic, environmental, and physiologic variation present in outbred populations. We work with naturally occurring diseases in large animal species to better understand how MSCs work and to facilitate optimal translation of MSC-based therapies. We are investigating the use of MSC therapy for a chronic oral inflammatory disease in cats. During our efforts to expand fat-derived feline MSCs (fMSCs), we observed that∼50% of the cell lines developed giant foamy multinucleated cells in later passages. These morphologic alterations were associated with proliferation arrest. We hypothesized that the cytopathic effects were caused by infection with a retrovirus, feline foamy virus (FFV). Using transmission electron microscopy, polymerase chain reaction, and in vitro assays, we determined that syncytial cell formation and proliferation arrest in fMSCs were caused by FFV strains that were highly homologous to previously reported FFV strains. We determined that the antiretroviral drug, tenofovir, may be used to support ex vivo expansion and salvage of FFV-infected fMSC lines. MSC lines derived from specific pathogen-free cats do not appear to be infected with FFV and may be a source of allogeneic fMSCs for clinical application. FFV infection of fMSC lines may hinder large-scale expansion of autologous MSC for therapeutic use in feline patients.
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Affiliation(s)
- Boaz Arzi
- 1 Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California , Davis, Davis, California
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30
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Aydin O, Korkusuz F, Korkusuz P, Tezcaner A, Bilgic E, Yaprakci V, Keskin D. In vitro and in vivo evaluation of doxycycline-chondroitin sulfate/PCLmicrospheres for intraarticular treatment of osteoarthritis. J Biomed Mater Res B Appl Biomater 2014; 103:1238-48. [PMID: 25350566 DOI: 10.1002/jbm.b.33303] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 09/05/2014] [Accepted: 10/02/2014] [Indexed: 11/10/2022]
Abstract
Osteoarthritis (OA) is a degenerative joint disease, which has no complete treatment with medication yet. Intraarticular hyaluronan (HA) injection can decrease pain and modify the natural course of OA. This study was designed to provide long term delivery of an MMP (matrix-metalloproteinase) inhibitor agent-doxycycline, together with matrix regenerative agent-chondroitin sulfate for treating OA which progress with matrix degenerations. Doxycycline (D) and doxycycline-chondroitin sulfate (D-CS) loaded poly-ɛ-caprolactone (PCL) microspheres (MS) were prepared as intraarticular delivery systems. Bio-effectiveness of developed microspheres was first evaluated with three-dimensional in vitro model of OA where both MS showed significant reduction in MMP-13 levels compared to untreated OA-chondrocytes at 15 and 24 days. Significant decrease was observed in GAG release into the media for both D MS and D-CS MS treated groups at 15 and 24 days. Second, the microspheres were injected to rabbit knee in hyaluronan (HA) to evaluate the effectiveness of the treatment. Radiographic scores of D MS and D-CS MS groups improved after 8 weeks when compared to OA group. Mankin-Pitzker histological scores similarly showed improvement with D MS and D-CSMS groups when compared to OA group. Ex vivo hardness tests of cartilages demonstrated superior hardness values with both doses of D-CSMS compared to OA group. D MS showed promising improvement of OA in histology results. Although, both MS groups had similar effects on cells in the in vitro model, D-CSMS had a positive contribution on all in vivo treatment outcomes and showed potential as a new strategy for treatment when applied to OA knee joints.
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Affiliation(s)
- Ozlem Aydin
- Department of Engineering Sciences, Middle East Technical University, 06800, Ankara, Turkey
| | - Feza Korkusuz
- Department of Sports Medicine, Hacettepe University, Faculty of Medicine, 06100, Ankara, Turkey
| | - Petek Korkusuz
- Department of Histology and Embryology, Hacettepe University, Faculty of Medicine, 06100, Ankara, Turkey
| | - Aysen Tezcaner
- Department of Engineering Sciences, Middle East Technical University, 06800, Ankara, Turkey.,BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, 06800, Turkey
| | - Elif Bilgic
- Department of Histology and Embryology, Hacettepe University, Faculty of Medicine, 06100, Ankara, Turkey
| | - Volkan Yaprakci
- Department of Surgery, Faculty of Veterinary Medicine, Afyon Kocatepe University, 03200, Afyon, Turkey
| | - Dilek Keskin
- Department of Engineering Sciences, Middle East Technical University, 06800, Ankara, Turkey.,BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, 06800, Turkey
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31
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Arzi B, Leale DM, Sinai NL, Kass PH, Lin A, Verstraete FJM. The temporomandibular joint of California sea lions (Zalophus californianus): part 2-osteoarthritic changes. Arch Oral Biol 2014; 60:216-22. [PMID: 25451465 DOI: 10.1016/j.archoralbio.2014.09.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 09/01/2014] [Accepted: 09/09/2014] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Following comprehensive characterization of the temporomandibular joint (TMJ) of the California sea lion, as well demonstrating that TMJ-osteoarthritis (OA) occurs in this species, the objective of this part of the investigation was to describe the macroscopic osteologic findings associated with TMJ-OA in a large museum collection of skull specimens. DESIGN Museum skull specimens (n=497) of California sea lions were examined macroscopically according to defined criteria for the presence, severity, location and characteristics of TMJ-OA. The specimens, acquired from strandings, varied in age from young adults to mature adults. RESULTS Overall 63.5% of the specimens had findings consistent with TMJ-OA. Of these, 56.2% were from females 43.8% were from males. Moreover, 71.2% specimens were from mature adults and 28.8% from young adults. However, there was no significant association between age and sex with the presence or severity of TMJ-OA. The most prominent TMJ-OA changes were the presence of subchondral bone defects and abnormal porosity. The majority of the OA present at the mandibular head affected the entire articular surface. In contrast, the OA present on the mandibular fossa of the temporal bone was located primarily on the medial aspect (P<0.001). CONCLUSION The incidence of TMJ-OA in California sea lions is high and varies in severity. Although the significance of the high incidence of this disease in the California sea lion remains elusive, the occurrence and severity of TMJ-OA detected in this study may play an important role in the species' morbidity and mortality.
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Affiliation(s)
- B Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
| | - D M Leale
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - N L Sinai
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - P H Kass
- Department of Population Health and Reproduction, School of Veterinary Medicine University of California, Davis, CA 95616, USA
| | - A Lin
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - F J M Verstraete
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
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Grenier S, Bhargava MM, Torzilli PA. An in vitro model for the pathological degradation of articular cartilage in osteoarthritis. J Biomech 2013; 47:645-52. [PMID: 24360770 DOI: 10.1016/j.jbiomech.2013.11.050] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 11/08/2013] [Accepted: 11/27/2013] [Indexed: 12/15/2022]
Abstract
The objective of this study was to develop an in vitro cartilage degradation model that emulates the damage seen in early-stage osteoarthritis. To this end, cartilage explants were collagenase-treated to induce enzymatic degradation of collagen fibers and proteoglycans at the articular surface. To assess changes in mechanical properties, intact and degraded cartilage explants were subjected to a series of confined compression creep tests. Changes in extracellular matrix structure and composition were determined using biochemical and histological approaches. Our results show that collagenase-induced degradation increased the amount of deformation experienced by the cartilage explants under compression. An increase in apparent permeability as well as a decrease in instantaneous and aggregate moduli was measured following collagenase treatment. Histological analysis of degraded explants revealed the presence of surface fibrillation, proteoglycan depletion in the superficial and intermediate zones and loss of the lamina splendens. Collagen cleavage was confirmed by the Col II-3/4Cshort antibody. Degraded specimens experienced a significant decrease in proteoglycan content but maintained total collagen content. Repetitive testing of degraded samples resulted in the gradual collapse of the articular surface and the compaction of the superficial zone. Taken together, our data demonstrates that enzymatic degradation with collagenase can be used to emulate changes seen in early-stage osteoarthritis. Further, our in vitro model provides information on cartilage mechanics and insights on how matrix changes can affect cartilage's functional properties. More importantly, our model can be applied to develop and test treatment options for tissue repair.
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Affiliation(s)
- Stephanie Grenier
- Laboratory for Soft Tissue Research, Tissue Engineering, Regeneration and Repair Program, The Hospital for Special Surgery, New York, NY 10021, United States.
| | - Madhu M Bhargava
- Laboratory for Soft Tissue Research, Tissue Engineering, Regeneration and Repair Program, The Hospital for Special Surgery, New York, NY 10021, United States
| | - Peter A Torzilli
- Laboratory for Soft Tissue Research, Tissue Engineering, Regeneration and Repair Program, The Hospital for Special Surgery, New York, NY 10021, United States
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Arzi B, Cissell DD, Verstraete FJM, Kass PH, DuRaine GD, Athanasiou KA. Computed tomographic findings in dogs and cats with temporomandibular joint disorders: 58 cases (2006-2011). J Am Vet Med Assoc 2013; 242:69-75. [PMID: 23234284 DOI: 10.2460/javma.242.1.69] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To describe CT findings in dogs and cats with temporomandibular joint (TMJ) disorders. DESIGN Retrospective case series. ANIMALS 41 dogs and 17 cats. PROCEDURES Medical records and CT images of the skull were reviewed for dogs and cats that were examined at a dentistry and oral surgery specialty practice between 2006 and 2011. RESULTS Of 142 dogs and 42 cats evaluated, 41 dogs and 17 cats had CT findings consistent with a TMJ disorder. In dogs, the most common TMJ disorder was osteoarthritis; however, in most cases, there were other TMJ disorders present in addition to osteoarthritis. Osteoarthritis was more frequently identified at the medial aspect rather than the lateral aspect of the TMJ, whereas the frequency of osteoarthritic involvement of the dorsal and ventral compartments did not differ significantly. In cats, fractures were the most common TMJ disorder, followed by osteoarthritis. Clinical signs were observed in all dogs and cats with TMJ fractures, dysplasia, ankylosis, luxation, and tumors; however, only 4 of 15 dogs and 2 of 4 cats with osteoarthritis alone had clinical signs. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that TMJ disorders were frequently present in combination. Osteoarthritis was the most common TMJ disorder in dogs and the second most common TMJ disorder in cats. Computed tomography should be considered as a tool for the diagnosis of TMJ disorders in dogs and cats with suspected orofacial disorders and signs of pain. (J Am Vet Med Assoc 2013;242:69-75).
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Affiliation(s)
- Boaz Arzi
- Department of Biomedical Engineering, College of Engineering, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA.
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Arzi B, Winer JN, Kass PH, Verstraete FJM. Osteoarthritis of the temporomandibular joint in southern sea otters (Enhydra lutris nereis). J Comp Pathol 2013; 149:486-94. [PMID: 23721871 DOI: 10.1016/j.jcpa.2013.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 02/13/2013] [Accepted: 03/20/2013] [Indexed: 11/29/2022]
Abstract
Museum skull specimens (n = 1,008) of southern sea otters (Enhydra lutris nereis) were examined macroscopically according to defined criteria for the presence, severity and characteristics of temporomandibular joint osteoarthritis (TMJ-OA). The specimens were from stranded young adult to adult animals. Overall, 4.1% of the specimens had findings consistent with TMJ-OA. Of these, 61.0% were from females and 39.0% were from males. In addition, 85.4% of the affected specimens were from adults and 14.6% were from young adults. However, there was no significant association between age and sex with the presence or severity of TMJ-OA. Lesion severity was mild in 41.5%, moderate in 19.5% and severe in 39.0% of affected specimens. The most prominent changes were the presence of osteophytes and subchondral bone defects and porosity. The mandibular condylar process and fossa were affected equally. The lengths of the right and left mandibular heads were significantly associated with age (P = 0.002 and P = 0.003, respectively) and sex (P = 0.0009 and P = 0.001, respectively), but not with the presence of TMJ-OA. The significance of this disease in sea otters remains elusive, but this condition may play an important role in survival of these animals.
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Affiliation(s)
- B Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
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