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  • Title: [Effects of curcumin on the recovery of hind limb function after spinal cord injury in rats and its mechamism].
    Author: Hao Q, Wang HW, Yu Q, Shen J, Zhao L, Shi FF, Chen MM, Yang YL.
    Journal: Zhongguo Ying Yong Sheng Li Xue Za Zhi; 2017 May 08; 33(5):441-444. PubMed ID: 29926590.
    Abstract:
    OBJECTIVE: To investigate the effects of curcumin on motor function, and to explore the neuroprotective mechanism of curcumin after the spinal cord injury in rats. The study will theoretical and experimental evidence for curcumin's clinical treatment. METHODS: HI-0400 spinal cord impactor was used to prepare animal models of acute of spinal cord injury. One hundred and five clean and healthy rats were randomly divide into three groups:sham operation group (Sham) spinal cord injury group (SCI) and curcumin group (SCI+CUR). Intragastric administration was administrated after 30min of the spinal cord injury model, after 1 time a day, until the death. SCI+CUR group was intragastric administration with curcumin (100 mg/kg) of 0.5% carboxymethyl cellulose sodium, and Sham and SCI group were treated with the same dose of 0.5% carboxymethyl cellulose sodium. The motor function recovery of 3,7,14,21 and 28 days after spinal cord injury were evaluated by basso,beatlie,bresnahan (BBB) score. The spinal cord tissue and blood samples were collected at postoperative 12 h, 1 d, 3 d and 7 d respectively, NF-kappa B was detected by immunofluorescence, Bcl-2, Bax and Caspase-3 were detected by immunohistochemistry. The expression of Bcl-2 and Bax was detected by Elisa. RESULTS: The statistic difference of BBB score between SCI group and CUR group in 3 day was not statistically significant. It was found that the 7,14,21 and 28 days BBB score in CUR group were statistically significant higher than that in SCI group(P<0.05).The expression of inflammatory factor NF-kappa B appeared in 12 h after spinal cord injury, 1 day peaked and 3 days decreased. In SCI+CUR group, the expression of NF-kappa B at each time point was similar to the SCI group, and there was a difference between group SCI+CUR and SCI group in 1day.There was no obvious staining of Bax and Bcl-2 in Sham group. The staining of Caspase-3 and Bax in SCI+CUR group was significantly weaker than that in SCI group, while Bcl-2 was stronger. CONCLUSIONS: Curcumin can promote the recovery of hindlimb motor function after spinal cord injury in rats.The mechanism is through inhibition of NF-K B to prevent inflammation; And inhibition the expression of Bax and Caspase-3, and promotion the expression of Bcl-2 to prevent apoptosis, so as to accelerate the recovery of motor function in the rats after spinal cord injury.
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