Calcitonin effect on cartilage morphology and proteoglycan expression in rats with osteoarthritis

doi:10.3969/j.issn.2095-4344.2015.42.003

Abstract

Abstract:

BACKGROUND: In recent years, calcitonin has been reported to have better clinical efficacy in the treatment of osteoarthritis, but its mechanism of action for osteoarthritis is rarely reported.

OBJECTIVE: To investigate the effect of calcitonin on the cartilage morphology and proteoglycan expression in rats with osteoarthritis.

METHODS: Thirty Sprague Dawley rats were randomly divided into three groups: model group, treatment group, and sham group. Anterior cruciate ligament transaction of the right limbs was implemented in the model and treatment groups, and only the joint cavity was exposed in the sham group. At 2 days after modeling, the treatment group received a daily subcutaneous injection of salmon calcitonin, 15 IU/(kg•d), and the model group and sham group were administered with normal saline at the same dose. The injection lasted for 6 weeks. At 10 weeks after modeling, the articular surface of the tibia of rats in each group was generally observed; bone mineral density of the distal femoral bone and subchondral bone of the lateral and medial ankle were detected using X-ray test; bone morphology and proteoglycan secretion were measured by hematoxylin-eosin staining and toluidine blue staining, respectively.

RESULTS AND CONCLUSION: The tibial articular surface was smooth and glossy in the sham group, but oxblood in the model group with large-area ulcers; the treatment group showed rough and local ulceration. Compared with the sham group, the bone mineral density of the subchondral bone of medial and lateral ankle were increased significantly in the model group (P < 0.05), but trabecular separation and proteoglycan content were decreased (P < 0.05). Compared with the model group, the bone mineral density of the subchondral bone of medial and lateral ankle were decreased significantly in the treatment group (P < 0.05), while the trabecular separation and proteoglycan content were increased (P < 0.05). These findings indicate that calcitonin has better protection on the cartilage of rats with osteoarthritis, and can promote bone the secretion of proteoglycan.
中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Calcitonin, Osteoarthritis, Models, Animal, Tissue Engineering

Tao Ye, Zhao Xin-you, Fang Guang. Calcitonin effect on cartilage morphology and proteoglycan expression in rats with osteoarthritis[J]. Chinese Journal of Tissue Engineering Research, 2015, 19(42): 6735-6739.

Figures/Tables 4

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