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https://www.readbyqxmd.com/read/29776006/mineralization-can-be-an-incidental-ultrasonographic-finding-in-equine-tendons-and-ligaments
#1
Etienne J O O'Brien, Roger K W Smith
Tendon/ligament mineralization is recognized in horses but information regarding its clinical significance is limited. The aims of this observational study were to report the structures most commonly affected by ultrasonographically detectable mineralization and, for these, determine frequency of diagnosis and key clinical features. Cases presented at our hospital in April 1999-April 2013 and September 2014-November 2015 were included: a total of 27 horses (22 retrospective, five prospective). Mineralizations were most common in deep digital flexor tendons (10) and suspensory ligament branches (eight), representing 10% and 7% (estimated), respectively, of horses diagnosed with injuries to these structures during the study...
May 18, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29750845/ultrasonographic-variations-are-present-in-the-distal-sesamoidean-impar-ligament-of-clinically-sound-horses
#2
Jessica Lauren MacDonald, Ruth-Anne Richter, Christine L Wimer
Ultrasonography is an established diagnostic test for evaluating horses with foot pain due to suspected podotrochlear apparatus pathology. However, variations from the previously reported normal appearance of the distal sesamoidean impar ligament have not always coincided with lameness. The objective of this prospective, cross-sectional, descriptive study was to characterize variations in the ultrasonographic appearance of the distal sesamoidean impar ligament in sound horses using the transcuneal approach...
May 11, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29721438/correlations-between-the-equine-metacarpophalangeal-joint-angulation-and-toe-conformation-in-statics
#3
Jenny Hagen, Kaid Kojah, Michael Geiger
The angulation of the equine fetlock determines the load of associated tendons and probably their predisposition for injuries. However, it is questionable how the individual toe conformation and tendon properties interact with the dorsal metacarpophalangeal joint angle (DMPJ). Data are needed for a tangible evaluation of the equine limb conformation for more specific orthopaedic treatment. The aim was to evaluate the correlation between the DMPJ, toe conformation and cross-sectional area (CSA) of both flexor tendons; the superficial digital flexor tendon (SDFT) and deep digital flexor tendon (DDFT)...
2018: Open Veterinary Journal
https://www.readbyqxmd.com/read/29715649/allogeneic-mesenchymal-stem-cell-transplantation-in-healthy-equine-superficial-digital-flexor-tendon-a-study-of-the-local-inflammatory-response
#4
Jaqueline Souza Brandão, Marina Landim Alvarenga, João Pedro Hubbe Pfeifer, Vitor Hugo Dos Santos, Carlos Eduardo Fonseca-Alves, Mirian Rodrigues, Renée Laufer-Amorim, José Antonio Lucas Castillo, Ana Liz Garcia Alves
The superficial digital flexor tendon (SDFT) is a structure frequently affected by injuries in high-performance athletic horses, and there are limited therapeutic options. Regenerative medicine has evolved significantly in treating different illnesses. However, understanding the cellular behaviour during mesenchymal stem cell (MSC) transplantation in healthy tissues is not fully known yet. To address the inflammatory response induced by allogeneic MSC transplantation, this study evaluated the local inflammatory response after the application of allogeneic adipose tissue-derived mesenchymal stem cells (AT-MSCs) in the equine tendon compared to an autologous transplant and the control group...
March 21, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29562776/micrornas-of-equine-amniotic-mesenchymal-cell-derived-microvesicles-and-their-involvement-in-anti-inflammatory-processes
#5
Anna Lange-Consiglio, Barbara Lazzari, Claudia Perrini, Flavia Pizzi, Alessandra Stella, Fausto Cremonesi, Emanuele Capra
Cell-derived microvesicles (MVs) are a recently discovered mechanism of cell-to-cell communication. Our previous data show that MVs secreted by equine amniotic mesenchymal-derived cells (AMCs) are involved in downregulation of proinflammatory genes in lipopolysaccharide-stressed equine tendon and endometrial cells. The aim of the present study was to evaluate whether AMC-MVs contain selected microRNAs (miRNAs) involved in inflammation. Two pools of cells, derived from 3 amniotic membranes each, and their respective MVs were collected...
January 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29498123/b-mode-and-power-doppler-ultrasonography-of-the-equine-suspensory-ligament-branches-a-descriptive-study-on-13-horses
#6
Silvia Rabba, Sigrid Grulke, Denis Verwilghen, Laurence Evrard, Valeria Busoni
Ultrasonography is routinely used to achieve the diagnosis of equine suspensory ligament desmopathy. In human medicine, power Doppler ultrasonography has also been found to be useful for the diagnosis of tendon/ligament injuries. The aim of this prospective, pilot study was to assess the presence or absence of power Doppler signal in suspensory ligament branches and compare B-mode findings with power Doppler findings in suspensory ligament branches of lame and non-lame limbs. Thirteen horses were used (eight lame horses, with lameness related to pain in the suspensory ligament branches, and five non-lame horses)...
March 1, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29437201/variations-during-ageing-in-the-three-dimensional-anatomical-arrangement-of-fascicles-within-the-equine-superficial-digital-flexor-tendon
#7
O J Ali, E J Comerford, P D Clegg, E G Canty-Laird
BiTendons are constructed from collagenous fascicles separated by endotenon/interfascicular matrix (IFM). Tendons may be specialised for precision movement or to store energy during locomotion and for the latter the elasticity of the endotenon/IFM is particularly important. The equine superficial digital flexor tendon (SDFT) is a dedicated energy-storing tendon with a similar function to the human Achilles tendon. Classical anatomical descriptions portray fascicles as longitudinally arranged distinct anatomical structures...
February 13, 2018: European Cells & Materials
https://www.readbyqxmd.com/read/29409868/structure-and-collagen-crimp-patterns-of-functionally-distinct-equine-tendons-revealed-by-quantitative-polarised-light-microscopy-qplm
#8
Ewa M Spiesz, Chavaunne T Thorpe, Philipp J Thurner, Hazel R C Screen
Structure-function relationships in tendons are directly influenced by the arrangement of collagen fibres. However, the details of such arrangements in functionally distinct tendons remain obscure. This study demonstrates the use of quantitative polarised light microscopy (qPLM) to identify structural differences in two major tendon compartments at the mesoscale: fascicles and interfascicular matrix (IFM). It contrasts functionally distinct positional and energy storing tendons, and considers changes with age...
April 1, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29362434/effects-of-processing-on-structural-mechanical-and-biological-properties-of-collagen-based-substrates-for-regenerative-medicine
#9
A Terzi, E Storelli, S Bettini, T Sibillano, D Altamura, L Salvatore, M Madaghiele, A Romano, D Siliqi, M Ladisa, L De Caro, A Quattrini, L Valli, A Sannino, C Giannini
The aim of this work was to investigate the structural features of type I collagen isoforms and collagen-based films at atomic and molecular scales, in order to evaluate whether and to what extent different protocols of slurry synthesis may change the protein structure and the final properties of the developed scaffolds. Wide Angle X-ray Scattering data on raw materials demonstrated the preferential orientation of collagen molecules in equine tendon-derived collagens, while randomly oriented molecules were found in bovine skin collagens, together with a lower crystalline degree, analyzed by the assessment of FWHM (Full Width at Half Maximum), and a certain degree of salt contamination...
January 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29338716/donor-age-affects-proteome-composition-of-tenocyte-derived-engineered-tendon
#10
Agnieszka J Turlo, Yalda Ashraf Kharaz, Peter D Clegg, James Anderson, Mandy J Peffers
BACKGROUND: The concept of tissue engineering is to deliver to the injury site biological scaffolds carrying functional cells that will enhance healing response. The preferred cell source is autologous in order to reduce immune response in the treated individual. However, in elderly patients age-related changes in synthetic activity of the implanted cells and subsequent alterations in tissue protein content may affect therapeutic outcomes. In this study we investigated the effect of donor age on proteome composition of tenocyte-derived tendon tissue-engineered constructs...
January 16, 2018: BMC Biotechnology
https://www.readbyqxmd.com/read/29274126/computed-tomographic-contrast-tenography-of-the-digital-flexor-tendon-sheath-of-the-equine-hindlimb
#11
Rachel Agass, Jonathon Dixon, Barny Fraser
Pre-surgical investigation of digital flexor tendon sheath pathology remains challenging with current standard imaging techniques. The aim of this prospective, anatomical, pilot study was to describe the anatomy of the equine hind limb digital flexor tendon sheath using a combination of computed tomography (CT) and computed tomographic contrast tenography in clinically normal cadaver limbs. Ten pairs of hind limbs with no external abnormalities were examined from the level of the tarsometatarsal joint distally...
December 22, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29152595/identification-of-equid-herpesvirus-2-in-tissue-engineered-equine-tendon
#12
Roisin Wardle, Jane A Pullman, Sam Haldenby, Lorenzo Ressel, Marion Pope, Peter D Clegg, Alan Radford, James P Stewart, Mohammed Al-Saadi, Philip Dyer, Mandy J Peffers
Background: Incidental findings of virus-like particles were identified following electron microscopy of tissue-engineered tendon constructs (TETC) derived from equine tenocytes. We set out to determine the nature of these particles, as there are few studies which identify virus in tendons per se , and their presence could have implications for tissue-engineering using allogenic grafts. Methods: Virus particles were identified in electron microscopy of TETCs. Virion morphology was used to initially hypothesise the virus identity...
2017: Wellcome Open Research
https://www.readbyqxmd.com/read/28855560/elastin-is-localised-to-the-interfascicular-matrix-of-energy-storing-tendons-and-becomes-increasingly-disorganised-with-ageing
#13
Marta S C Godinho, Chavaunne T Thorpe, Steve E Greenwald, Hazel R C Screen
Tendon is composed of fascicles bound together by the interfascicular matrix (IFM). Energy storing tendons are more elastic and extensible than positional tendons; behaviour provided by specialisation of the IFM to enable repeated interfascicular sliding and recoil. With ageing, the IFM becomes stiffer and less fatigue resistant, potentially explaining why older tendons become more injury-prone. Recent data indicates enrichment of elastin within the IFM, but this has yet to be quantified. We hypothesised that elastin is more prevalent in energy storing than positional tendons, and is mainly localised to the IFM...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28822690/microrna29a-treatment-improves-early-tendon-injury
#14
Ashlee E Watts, Neal L Millar, Josh Platt, Susan M Kitson, Moeed Akbar, Raquel Rech, Jay Griffin, Roy Pool, Tom Hughes, Iain B McInnes, Derek S Gilchrist
Tendon injuries (tendinopathies) are common in human and equine athletes and characterized by dysregulated collagen matrix, resulting in tendon damage. We have previously demonstrated a functional role for microRNA29a (miR29a) as a post-transcriptional regulator of collagen 3 expression in murine and human tendon injury. Given the translational potential, we designed a randomized, blinded trial to evaluate the potential of a miR29a replacement therapy as a therapeutic option to treat tendinopathy in an equine model that closely mimics human disease...
October 4, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28794162/the-relative-compliance-of-energy-storing-tendons-may-be-due-to-the-helical-fibril-arrangement-of-their-fascicles
#15
Tom Shearer, Chavaunne T Thorpe, Hazel R C Screen
A nonlinear elastic microstructural model is used to investigate the relationship between structure and function in energy-storing and positional tendons. The model is used to fit mechanical tension test data from the equine common digital extensor tendon (CDET) and superficial digital flexor tendon (SDFT), which are used as archetypes of positional and energy-storing tendons, respectively. The fibril crimp and fascicle helix angles of the two tendon types are used as fitting parameters in the mathematical model to predict their values...
August 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28702884/decellularization-of-large-tendon-specimens-combination-of-manually-performed-freeze-thaw-cycles-and-detergent-treatment
#16
Susanne Pauline Roth, Ina Erbe, Janina Burk
Reliable decellularization techniques applicable to tendon tissue play a critical role in the field of current tissue engineering. Particularly, an application as three-dimensional culture model for in vitro research and translational approaches to establish graft-based tendon repair as a routine clinical tool represent two main application fields for decellularized tendon scaffolds. Considering methodological issues of tendon decellularization, one of the major challenges lies in the preservation of the tendon-specific extracellular matrix (ECM) architecture to reflect natural tissue characteristic as best as possible...
July 13, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28697880/comparison-of-autologous-bone-marrow-and-adipose-tissue-derived-mesenchymal-stem-cells-and-platelet-rich-plasma-for-treating-surgically-induced-lesions-of-the-equine-superficial-digital-flexor-tendon
#17
COMPARATIVE STUDY
A Romero, L Barrachina, B Ranera, A R Remacha, B Moreno, I de Blas, A Sanz, F J Vázquez, A Vitoria, C Junquera, P Zaragoza, C Rodellar
Several therapies have been investigated for equine tendinopathies, but satisfactory long term results have not been achieved consistently and a better understanding of the healing mechanism elicited by regenerative therapies is needed. The aim of this study was to assess the separate effects of autologous bone marrow (BM) and adipose tissue (AT) derived mesenchymal stem cells (MSCs), and platelet rich plasma (PRP), for treating lesions induced in the superficial digital flexor tendon (SDFT) of horses. Lesions were created surgically in both SDFTs of the forelimbs of 12 horses and were treated with BM-MSCs (six tendons), AT-MSCs (six tendons) or PRP (six tendons)...
June 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28681515/accuracy-of-open-magnetic-resonance-imaging-for-guiding-injection-of-the-equine-deep-digital-flexor-tendon-within-the-hoof
#18
Lauren M Groom, Nathaniel A White, M Norris Adams, Jennifer G Barrett
Lesions of the distal deep digital flexor tendon (DDFT) are frequently diagnosed using MRI in horses with foot pain. Intralesional injection of biologic therapeutics shows promise in tendon healing; however, accurate injection of distal deep digital flexor tendon lesions within the hoof is difficult. The aim of this experimental study was to evaluate accuracy of a technique for injection of the deep digital flexor tendon within the hoof using MRI-guidance, which could be performed in standing patients. We hypothesized that injection of the distal deep digital flexor tendon within the hoof could be accurately guided using open low-field MRI to target either the lateral or medial lobe at a specific location...
July 6, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28650233/evaluation-of-clinical-and-tenoscopic-findings-in-the-carpal-flexor-sheath-of-horses
#19
Sandra M Zetterström, Bengt C Johansson, James L Carmalt
OBJECTIVE To evaluate clinical and tenoscopic findings in a large group of horses undergoing surgery of the carpal flexor sheath (CFS) and determine whether any of the presurgical clinical signs were associated with tenoscopic findings. ANIMALS 242 horses that had undergone diagnostic and therapeutic tenoscopy of the CFS because of aseptic tenosynovitis. PROCEDURES Medical and tenoscopic video records (when available) of 242 horses undergoing tenoscopy of the CFS at a single equine clinic between January 2005 and June 2014 were reviewed...
July 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28583184/effect-of-single-intralesional-treatment-of-surgically-induced-equine-superficial-digital-flexor-tendon-core-lesions-with-adipose-derived-mesenchymal-stromal-cells-a-controlled-experimental-trial
#20
Florian Geburek, Florian Roggel, Hans T M van Schie, Andreas Beineke, Roberto Estrada, Kathrin Weber, Maren Hellige, Karl Rohn, Michael Jagodzinski, Bastian Welke, Christof Hurschler, Sabine Conrad, Thomas Skutella, Chris van de Lest, René van Weeren, Peter M Stadler
BACKGROUND: Adipose tissue is a promising source of mesenchymal stromal cells (MSCs) for the treatment of tendon disease. The goal of this study was to assess the effect of a single intralesional implantation of adipose tissue-derived mesenchymal stromal cells (AT-MSCs) on artificial lesions in equine superficial digital flexor tendons (SDFTs). METHODS: During this randomized, controlled, blinded experimental study, either autologous cultured AT-MSCs suspended in autologous inactivated serum (AT-MSC-serum) or autologous inactivated serum (serum) were injected intralesionally 2 weeks after surgical creation of centrally located SDFT lesions in both forelimbs of nine horses...
June 5, 2017: Stem Cell Research & Therapy
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