ArticleJournal of molecular histology2024
Bone marrow mesenchymal stem cells (BM-MSCs) modulate MMP9 expression and promote articular cartilage regeneration in knee joint of a model of arthritis induced in adult rat: histological and immunohistochemical study.
Article in Journal of molecular histology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Arthritis is characterized by the progressive degeneration of articular cartilage, and the avascular nature of cartilage limits its capacity for self-repair. Stem cells are considered a promising treatment option due to their multipotent differentiation potential. The aim of this work was to investigate the structural changes in the hyaline articular cartilage of the knee joint in a model of arthritis induced by complete Freund's adjuvant, and to assess intra-articular injection of bone marrow mesenchymal stem cells (BM-MSCs) through both histological and immunohistochemical study. Adult male albino rats were divided into four groups: group 0 (donor group), group I (control group), group II (arthritis group) and group III (BM-MSCs treated arthritis group). Samples were collected 2, 6 and 10 weeks after the onset of the experiment. Sections were stained with; hematoxylin and eosin, Safranin O fast green stain, Masson's trichrome stain and anti-MMP9 antibody. In Group II (arthritis group), the articular cartilage showed signs of degeneration, including chondrocyte extensive proliferation, fibrillations, fissuring, and denudation, with fibrous tissue covering the exposed surface. There was a significant decrease in cartilage thickness, collagen content, and proteoglycan levels. The integrated density of MMP9 in the cartilage was significantly increased compared to Group I (control group). In contrast, Group III (BM-MSCs-treated arthritis group) exhibited a continuous cartilage surface with no cracks or fissures. There was a significant increase in cartilage thickness, collagen content, and proteoglycan levels, while the integrated density of MMP9 was significantly decreased compared to Group II (arthritis group).
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