Ligustrazine for early-stage knee osteoarthritis in rats: changes in the expression levels of type Ⅱ collagen fiber alpha 1, vascular endothelial growth factor and miR20b in the cartilage / 中国组织工程研究
Chinese Journal of Tissue Engineering Research
;
(53): 1846-1851, 2018.
Article
in Chinese
| WPRIM
| ID: wpr-698624
ABSTRACT
BACKGROUND:
Preliminary studies have found that ligustrazine can effectively improve the levels of nitric oxide and prostaglandin E2, and alleviate the inflammatory response of osteoarthritis, but the related mechanism remains unclear.OBJECTIVE:
To observe the effect of ligustrazine on the expression levels of type Ⅱ collagen fiber α 1, vascular endothelial growth factor (VEGF) mRNA and miR20b in the articular cartilage of knee osteoarthritis model, and to explore the mechanism of ligustrazine for early-stage knee osteoarthritis in rats.METHODS:
Healthy male Sprague-Dawley rats were randomized into normal, model, high- and low-dose ligustrazine, and positive control groups. Rats in the latter four groups were used to establish the model of early-stage knee osteoarthritis by intra-articular injection of papain, and were then intragastrically given the administration of normal saline, 100 and 50 mg/kg ligustrazine, and 24 mg/kg celecoxib, respectively. The normal group was given the same volume of normal saline. The treatment in each group lasted for 6 weeks. Then, the rat cartilage was taken, and changes of cartilage tissues were assessed by Mankin scores. Expression levels of type Ⅱ collagen fiber α 1, VEGF mRNA and miR20b in the cartilage were detected by qRT-PCR. RESULTS ANDCONCLUSION:
The order of Mankin scores was as follows normal group < high-dose ligustrazine group < positive control group < low-dose ligustrazine group < model group (P < 0.05). The mRNA expression levels of type Ⅱ collagen fiber α 1 and VEGF were the highest in the normal group, followed by the high-dose ligustrazine group, positive control group, low-dose ligustrazine group, and model group (P < 0.05). The expression level of miR20b was significantly up-regulated except the model group, and its order was follows high-dose ligustrazine group < positive control group < low-dose ligustrazine group. Our results indicate that ligustrazine has a positive effect on early-stage knee osteoarthritis in rats, and the possible mechanisms by which ligustrazine promotes cartilage repair are to up-regulate miR20b expression and to inhibit VEGF mRNA expression.
Full text:
Available
Index:
WPRIM (Western Pacific)
Type of study:
Controlled clinical trial
/
Prognostic study
Language:
Chinese
Journal:
Chinese Journal of Tissue Engineering Research
Year:
2018
Type:
Article
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