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Juvenile Cartilage

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https://www.readbyqxmd.com/read/27921292/cranial-joint-histology-in-the-mallard-duck-anas-platyrhynchos-new-insights-on-avian-cranial-kinesis
#1
Alida M Bailleul, Lawrence M Witmer, Casey M Holliday
The evolution of avian cranial kinesis is a phenomenon in part responsible for the remarkable diversity of avian feeding adaptations observable today. Although osteological, developmental and behavioral features of the feeding system are frequently studied, comparatively little is known about cranial joint skeletal tissue composition and morphology from a microscopic perspective. These data are key to understanding the developmental, biomechanical and evolutionary underpinnings of kinesis. Therefore, here we investigated joint microstructure in juvenile and adult mallard ducks (Anas platyrhynchos; Anseriformes)...
December 6, 2016: Journal of Anatomy
https://www.readbyqxmd.com/read/27919119/-osteochondritis-dissecans-of-the-talus-a-critical-review
#2
J Bruns, C R Habermann, J P Petersen
The etiology remains unclear. Mechanical factors seem to play an important role. Most histologies report clefts between the cartilage and bone and necrotic areas. Several classifications have been published based on observations from imaging techniques or on intraoperative findings. Clinical symptoms are unspecific. Imaging techniques are of great importance: X-rays of the ankle joint enable a quick diagnostic overview. MRT is the imaging-technique of choice for diagnosing OCDT-lesions. Regarding treatment, a tremendous number of retrospective publications exist...
April 2016: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/27903929/a-comparison-of-outcomes-of-particulated-juvenile-articular-cartilage-and-bone-marrow-aspirate-concentrate-for-articular-cartilage-lesions-of-the-talus
#3
Nathan S Lanham, John J Carroll, Minton T Cooper, Venkat Perumal, Joseph S Park
Background Articular cartilage lesions of the talus remain a challenging clinical problem because of the lack of natural regeneration and limited treatment options. Microfracture is often the first-line therapy, however lesions larger than 1.5 cm(2) have been shown to not do as well with this treatment method. Methods The objective of this retrospective study was to evaluate the outcomes of iliac crest bone marrow aspirate concentrate/collagen scaffold (ICBMA) and particulated juvenile articular cartilage (PJAC) for larger articular cartilage lesions of the talus...
November 30, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27900348/implementation-of-musculoskeletal-ultrasonography-in-detection-of-early-juvenile-idiopathic-arthritis
#4
Ayman F Darwish, Faten M Ismael, Abdou Ell-Laban, Ahmed Hamed, Moustafa Abdel Kader, Ashraf Osman
AIM: To determine whether early clinical, laboratory and musculoskeletal ultrasound (MSUS) characteristics can be used as early detectors of juvenile idiopathic arthritis. PATIENTS AND METHODS: Forty (40) patients with juvenile idiopathic arthritis (JIA) diagnosed according to the ILAR criteria [1] and 20 healthy control children. All patients were subjected to the following assessment at base line and at follow up after 6 months: Clinical evaluation, MSUS examination and laboratory evaluation...
2016: European Journal of Radiology Open
https://www.readbyqxmd.com/read/27742016/imaging-of-inflammatory-arthritis-in-children-status-and-perspectives-on-the-use-of-ultrasound-radiographs-and-magnetic-resonance-imaging
#5
Nancy A Chauvin, Asef Khwaja
The hallmark of juvenile idiopathic arthritis is synovial inflammation, and the goal of treatment is to suppress inflammation to prevent cartilage damage and bone erosions. Ultrasound and MRI are widely used imaging modalities in evaluating disease burden and response to treatments and are superior to clinical examination alone. However, differentiating between the normal appearance of the developing skeleton and pathologic conditions can be difficult, particularly in early disease. Larger, long-term studies are needed to standardize imaging definitions and protocols and to fully understand the clinical implications of imaging findings...
November 2016: Rheumatic Diseases Clinics of North America
https://www.readbyqxmd.com/read/27713578/a-rare-cause-of-chronic-elbow-pain-in-an-adolescent-baseball-player-a-case-report
#6
David Wasylynko
OBJECTIVE: To present a case of chronic elbow pain as a result of a hidden underlying osteochondral defect. CLINICAL FEATURES: A 17-year old baseball player presented with chronic lateral elbow pain. Examination revealed swelling of the elbow with signs of possible ligament, muscle, and tendon injury. DIAGNOSIS AND TREATMENT: Although there was apparent soft-tissue injury, the elbow swelling created immediate suspicion of a more serious underlying condition...
September 2016: Journal of the Canadian Chiropractic Association
https://www.readbyqxmd.com/read/27709060/arthroscopic-juvenile-allograft-cartilage-implantation-for-cartilage-lesions-of-the-hip
#7
Cecilia Pascual-Garrido, Jiandong Hao, John Schrock, Omer Mei-Dan, Jorge Chahla
Cartilage lesions in the hip are of high prevalence. Most of these lesions are treated with microfracture. Microfracture has relatively good subjective outcomes for smaller lesions; however, it is limited by the ability to reproduce hyaline cartilage, especially in older patients. For larger chondral defects, we present a technique using juvenile allograft cartilage implantation implanted arthroscopically to treat cartilage lesions in the hip. The purpose of this technical note is to describe the arthroscopic technique for treating chondral lesions in the hip with allograft juvenile cartilage...
August 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27679727/imaging-of-juvenile-idiopathic-arthritis-part-ii-ultrasonography-and-mri
#8
REVIEW
Iwona Sudoł-Szopińska, Elżbieta Grochowska, Piotr Gietka, Mateusz Płaza, Grzegorz Pracoń, Fadhil Saied, Marta Walentowska-Janowicz
Juvenile idiopathic arthritis is the most common autoimmune systemic disease of the connective tissue affecting individuals in the developmental age. Radiography, which was described in the first part of this publication, is the standard modality in the assessment of this condition. Ultrasound and magnetic resonance imaging enable early detection of the disease which affects soft tissues, as well as bones. Ultrasound assessment involves: joint cavities, tendon sheaths and bursae for the presence of synovitis, intraand extraarticular fat tissue to visualize signs of inflammation, hyaline cartilage, cartilaginous epiphysis and subchondral bone to detect cysts and erosions, and ligaments, tendons and their entheses for signs of enthesopathies and tendinopathies...
September 2016: Journal of Ultrasonography
https://www.readbyqxmd.com/read/27679726/imaging-of-juvenile-idiopathic-arthritis-part-i-clinical-classifications-and-radiographs
#9
REVIEW
Iwona Sudoł-Szopińska, Genowefa Matuszewska, Piotr Gietka, Mateusz Płaza, Marta Walentowska-Janowicz
Juvenile idiopathic arthritis is the most common autoimmune systemic disease of the connective tissue affecting individuals at the developmental age. Radiography is the primary modality employed in the diagnostic imaging in order to identify changes typical of this disease entity and rule out other bone-related pathologies, such as neoplasms, posttraumatic changes, developmental defects and other forms of arthritis. The standard procedure involves the performance of comparative joint radiographs in two planes...
September 2016: Journal of Ultrasonography
https://www.readbyqxmd.com/read/27631413/insights-into-the-epiphyseal-cartilage-origin-and-subsequent-osseous-manifestation-of-juvenile-osteochondritis-dissecans-with-a-modified-clinical-mr-imaging-protocol-a-pilot-study
#10
Jutta Ellermann, Casey P Johnson, Luning Wang, Jeffrey A Macalena, Bradley J Nelson, Robert F LaPrade
Purpose To retrospectively determine if a modified clinical magnetic resonance (MR) imaging protocol provides information on the origin of juvenile osteochondritis dissecans (JOCD) lesions and allows for staging on the basis of the proposed natural history of JOCD to better guide clinical management of the disease. Materials and Methods This institutional review board-approved, HIPAA-compliant, retrospective study was performed in 13 consecutive patients (mean age, 14.9 years; age range, 10-22 years; nine male and four female patients) and one additional comparative patient (a 44-year-old man), in which 19 knees with 20 JOCD lesions were imaged...
September 15, 2016: Radiology
https://www.readbyqxmd.com/read/27618228/cyclic-tensile-strain-reduces-tnf-%C3%AE-induced-expression-of-mmp-13-by-condylar-temporomandibular-joint-cells
#11
Hessam Tabeian, Astrid D Bakker, Beatriz F Betti, Frank Lobbezoo, Vincent Everts, Teun J de Vries
OBJECTIVE: To investigate whether the disproportionate degradation of mandibular condyle cartilage in arthritic juvenile temporomandibular joint (TMJ) is related to distinctive responses of TMJ-derived cells to tumor necrosis factor-α (TNF-α), and whether mechanical loading affects this response. METHODS: The effect of TNF-α (0.1-10ng/ml) was tested on juvenile porcine TMJ cells isolated from the condyle, fossa, and disc, grown in 3D agarose gels. Expression of anabolic and catabolic factors was quantified by RT-qPCR and/or immunohistochemistry...
September 12, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27574269/alloreactivity-and-immunosuppressive-properties-of-articular-chondrocytes-from-osteoarthritic-cartilage
#12
S Abe, H Nochi, H Ito
PURPOSE: To determine whether articular chondrocytes derived from osteoarthritic knee joints could evoke alloreactive proliferation of peripheral blood mononuclear cells (PBMC) and inhibit mitogenic activity of polyclonally activated CD4+ major histocompatibility complex (MHC) class II- restricted T cells in vitro. METHODS: Osteoarthritic cartilages of 17 patients aged 61 to 85 years were harvested during total knee arthroplasty. Chondrocytes were cultured for experiments...
August 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/27553086/ammonium-chloride-potassium-lysing-buffer-treatment-of-fully-differentiated-cells-increases-cell-purity-and-resulting-neotissue-functional-properties
#13
Wendy E Brown, Jerry C Hu, Kyriacos A Athanasiou
Juvenile and fetal, primary, fully differentiated cells are widely considered to be ideal cell types for tissue engineering applications. However, their use in tissue engineering may be hindered through contamination by undesirable cell types. These include blood-associated cells as well as unwanted resident cell types found both in healthy and pathologic donor tissues. Ammonium-chloride-potassium (ACK) lysing buffer is used to lyse red blood cells (RBCs) during the isolation of stem cell populations, but has not been explored for the purification of fully differentiated cells...
September 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/27520654/better-late-than-never-effective-air-borne-hearing-of-toads-delayed-due-to-late-maturation-of-the-tympanic-middle-ear-structures
#14
Molly C Womack, Jakob Christensen-Dalsgaard, Kim L Hoke
Most vertebrates have evolved a tympanic middle ear that enables effective hearing of airborne sound on land. Although inner ears develop during the tadpole stages of toads, tympanic middle ear structures are not complete until months after metamorphosis, potentially limiting the sensitivity of post-metamorphic juveniles to sounds in their environment. We tested the hearing of five species of toads to determine how delayed ear development impairs airborne auditory sensitivity. We performed auditory brainstem recordings to test the hearing of the toads and used micro-CT and histology to relate the development of ear structures to hearing ability...
August 12, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27475530/effects-of-passage-number-and-post-expansion-aggregate-culture-on-tissue-engineered-self-assembled-neocartilage
#15
Brian J Huang, Jerry C Hu, Kyriacos A Athanasiou
UNLABELLED: Chondrocyte dedifferentiation presents a major barrier in engineering functional cartilage constructs. To mitigate the effects of dedifferentiation, this study employed a post-expansion aggregate culture step to enhance the chondrogenic phenotype of passaged articular chondrocytes (ACs) before their integration into self-assembled neocartilage constructs. The objective was twofold: (1) to explore how passage number (P2, P3, P4, P5, P6, and P7), with or without aggregate culture, affected construct properties; and (2) to determine the highest passage number that could form neocartilage with functional properties...
October 1, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27460999/repetitive-stresses-generate-osteochondral-lesions-in-skeletally-immature-rabbits
#16
Austin V Stone, Kevin J Little, David L Glos, Keith F Stringer, Eric J Wall
BACKGROUND: The origin of juvenile osteochondritis dissecans (OCD) is unknown. Existing experimental animal models of OCD most frequently involve surgically created lesions but do not examine repetitive stress as a possible cause of OCD. HYPOTHESIS: Repetitive stresses can cause OCD-like lesions in immature animals. STUDY DESIGN: Controlled laboratory study. METHODS: Six juvenile rabbits were subjected to repetitive loading forces of approximately 160% body weight to the right hindlimb during five 45-minute sessions per week for 5 weeks...
July 26, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27442212/catcher-s-knee-posterior-femoral-condyle-juvenile-osteochondritis-dissecans-in-children-and-adolescents
#17
Mark J McElroy, Patrick M Riley, Frances A Tepolt, Adam Y Nasreddine, Mininder S Kocher
BACKGROUND: Juvenile osteochondritis dissecans is an idiopathic condition involving subchondral bone and articular cartilage in skeletally immature patients in whom the growth plates are open, potentially leading to lesion instability. Because of the differing forces experienced by baseball/softball catchers versus position players, the age at which lesions develop and the characteristics of the lesions themselves may differ between these 2 populations. The purpose of the study was to examine relative age and characteristics of osteochondritis dissecans (OCD) knee lesions in catchers compared with position players...
July 20, 2016: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/27401002/pediatric-musculoskeletal-ultrasound-age-and-sex-related-normal-b-mode-findings-of-the-knee
#18
Daniel Windschall, Ralf Trauzeddel, Maria Haller, Manuela Krumrey-Langkammerer, Antje Nimtz-Talaska, Rainer Berendes, Gerd Ganser, Christine Nirschl, Philipp Schoof, Ralf Felix Trauzeddel, Katharina Palm-Beden, Hartwig Lehmann
Musculoskeletal ultrasound (MSUS) is an important tool for evaluating disease activity, therapeutic progress, and remission status of rheumatic diseases in children. Knowledge of age-related normal findings is essential when interpreting pathological findings such as those seen in juvenile idiopathic arthritis. To evaluate normal findings of the knee joint, we recorded age-related stages of musculoskeletal development in the knee of 435 healthy children between 1 and 18 years of age using high-resolution B-mode MSUS...
November 2016: Rheumatology International
https://www.readbyqxmd.com/read/27385219/circulating-cartilage-oligomeric-matrix-protein-in-juvenile-idiopathic-arthritis
#19
P Lewander, C Dahle, B Larsson, J Wetterö, T Skogh
OBJECTIVES: Raised serum cartilage oligomeric matrix protein (sCOMP) has been reported to predict erosive disease in early rheumatoid arthritis (RA). In juvenile idiopathic arthritis (JIA), subnormal sCOMP levels have been associated with ongoing inflammation and growth retardation. In this study we aimed to assess sCOMP, C-reactive protein (CRP), and insulin-like growth factor (IGF)-1 in children/adolescents with JIA and in referents. METHOD: We enrolled 52 JIA patients at planned outpatient visits and 54 inpatients with ongoing infection ('infection referents')...
July 6, 2016: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/27383491/report-recurrent-hip-arthritis-diagnosed-as-juvenile-idiopathic-arthritis-a-case-report
#20
Tung-Ming Chang, Kuender D Yang, Su-Boon Yong
Juvenile idiopathic arthritis is the most common rheumatic disease in childhood. It is a chronic inflammatory disease associated with arthritis of unknown etiology that begins before the age of 16 and persists for longer than 6 weeks. In this report, the case of a child who suffered recurrent alternative hip arthritis with bilateral hip arthritis is examined, in which he was finally diagnosed as suffering from Juvenile idiopathic arthritis. A 14-year-old boy of Taiwanese origin presented with a normal birth and developmental history...
May 2016: Pakistan Journal of Pharmaceutical Sciences
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