'Milwaukee shoulder'—association of microspheroids containing hydroxyapatite crystals, active collagenase, and neutral protease with rotator cuff defects. ii. synovial fluid studies
| Autor: | John C. Garancis, Neil S. Mandel, Daniel J. McCarty, Herman S. Cheung, Paul B. Halverson |
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| Rok vydání: | 1981 |
| Předmět: |
musculoskeletal diseases
Pathology medicine.medical_specialty Knee Joint Immunology Osteoarthritis X-Ray Diffraction Rheumatology Synovial Fluid medicine Humans Immunology and Allergy Synovial fluid Pharmacology (medical) Rotator cuff Aged Shoulder Joint Chemistry Middle Aged medicine.disease Microscopy Electron Microbial Collagenase medicine.anatomical_structure Rheumatoid arthritis Microscopy Electron Scanning Collagenase Tears Female Hydroxyapatites Joint Diseases Milwaukee shoulder syndrome Peptide Hydrolases medicine.drug |
| Zdroj: | Arthritis & Rheumatism. 24:474-483 |
| ISSN: | 1529-0131 0004-3591 |
| DOI: | 10.1002/art.1780240304 |
| Popis: | Hydroxyapatite crystals in spheroid-shaped masses 1.9-15.6 micrometer in diameter were found in 12 of 13 synovial fluids obtained from the shoulder joints of 4 patients with rotator cuff tears and glenohumeral osteoarthritis. Two of 16 control joint fluids also showed these particles. Collagen types I, II and III were identified in the joint fluid pellets from 3 of the 4 patients, and fibers with typical collagen periodicity were also seen on transmission electronmicroscopy. Collagenase and neutral protease activities were found in fluids from 5 joints in 3 patients, whereas active collagenase was found in only 1 of 10 fluids from rheumatoid arthritis patients and in none of 3 fluids from patients with osteoarthritis. Neutral protease activities were present in several rheumatoid joint fluids. These findings are compatible with the hypothesis of an enzymatic release of hydroxyapatite crystals from the synovium and endocytosis by synovial macrophage-like cells with subsequent crystal-stimulated release of collagenase and neutral protease into the joint fluid, completing a pathogenetic cycle. |
| Databáze: | OpenAIRE |
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