PDF
Full
Outline
Objective To investigate the effects of stem cells from human deciduous teeth (SHED) on temporomandibular joint osteoarthritis (TMJOA) in rats. Methods Sixty 8-week-old male SD rats were randomly divided into control group, sodium iodoacetate (MIA)-induced TMJOA group (MIA group) and SHED treatment TMJOA group (SHED group), 20 rats in each group, and 10 animals were sacrificed in each group 2 and 4 weeks after treatment and were collected. Temporomandibular joint (TMJ) on the left was used for morphological detection, and right TMJ condylar cartilage for molecular biology detection. The degree of cartilage degeneration was evaluated by HE and Saffron O-solid green staining, the expression of type collagen Ⅱ in condylar cartilage was detected by immunohistochemical staining, and the expression changes of cleaved-CASP3, the key molecule of apoptosis, and the pro-inflammatory factor tumor necrosis factor-α (TNF-α), were detected by Western blotting. Results Compared with control group, the arrangement of cells in each layer of condylar cartilage in MIA group was disordered, a large number of cell-free areas were visible, and the fibrous layer was significantly thickened (P<0.001). After SHED treatment, the morphology of SHED group basically returned to normal, and there was no significant difference between SHED group and control group. The histological score of Mankin's osteoarthritis of condylar cartilage in MIA group was significantly higher than that in control group (P<0.001). After treatment, the score decreased significantly in SHED group (P<0.001). The positive area ratio of Saffron-O staining and the percentage of positive area of collagen Ⅱ. Of condylar cartilage in MIA group were significantly lower than those in control group (P<0.001). After treatment, the value increased significantly in SHED group (P<0.01) and there was no significant difference compared with control group. The number of TUNEL-positive cells in the condylar cartilage in MIA group was significantly higher than that in control group (P<0.001). After treatment, this value decreased significantly in SHED group (P<0.001). Western blotting results showed that the protein expression levels of cleaved-CASP3 and TNF-α in the condylar cartilage of MIA group were significantly higher than those in control group (P<0.001). After treatment, this value decreased significantly in SHED group (P<0.001) and there was no significant difference compared with control group. Conclusion Intra-articular injection of SHED can reverse condylar cartilage degeneration induced by MIA.
PDF
196
86
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
