Affiliation:
1. Cell Biology Department, Glasgow University, Glasgow, UK
2. Department of Orthopaedic Surgery Western Infirmary, Glasgow, UK
Abstract
SUMMARY
The accumulation of inflammatory cells in synovial tissue was studied using indirect immunofluorescence assays on cell cultures and frozen tissue sections of healing rat digital flexor tendons, Flexor tendons were collected from rats 3, 7 and 14 days after crush injury. Tendon sheath and epithenon cells were isolated by sequential enzymic digestion and cultured for 2 days. Subpopulations of synovial and inflammatory cells were identified with MoAbs against cell surface glycoproteins present on B lymphocytes (CD45), T lymphocytes (CD2, CD4, CD8), macrophages (CD14) and endothelial cells. A phagocytosis assay was also used to identify macrophages. We report a substantial increase in the number of T lymphocytes (mainly helper inducer) and phagocytotic cells with monocyte/macrophage surface markers in tendon sheath and epitenon 3 days after crush injury. The infiltration of inflammatory cells into synovial sheath and epitenon preceded an increase in fibronectin production by tendon cells which was seen 7 days after injury. To study the interaction between T lymphocytes and synovial cells in vitro, we established synovial fibroblast-like type B cell cultures and used stimulated and non-stimulated T lymphocytes in cell binding assays. We observed increased adhesiveness between unstimulated synovial cells and synovial cells previously cultured with activated and non-activated T lymphocytes. ELISA inhibition studies have shown an increase in fibronectin production by synovial fibroblastsco-cultured with stimulated CD4+ T lymphocytes. We suggest that the presence of inflammatory cells in synovial sheath and epitenon during tendon healing induces synovial fibroblasts and epilenon cells to increase their production of fibronectin. Which provides a scaffold for subsequent adhesion formation.
Publisher
Oxford University Press (OUP)
Subject
Immunology,Immunology and Allergy
Reference37 articles.
1. Flexor tendon healing and restoration of the gliding surface;Gelberman;J Bone Joint Surg,1983
2. An experimental model for the study of canine flexor tendon adhesions;Rothkopf;J Hand Surg,1991
3. Tendon healing within the flexor digital sheath in the dog;Potenza;J Bone Joint Surg,1962
4. The fibroblast in flexor tendon healing;Linsday;Plast Reconstruct Surg,1964
5. Digital flexor tendons: an experimental study. Part 1. The significance of each component of the flexor mechanism in tendon healing;Linsday;Br J Plast Surg,1961
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