中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (8): 1223-1228.doi: 10.12307/2023.965

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

美洲大蠊研粉干预脊髓半横断大鼠运动功能和自噬蛋白Beclin-1的表达

周邦瑜1,李  杰1,阮玉山2,耿福能3,李绍波4   

  1. 1大理大学临床医学院,云南省大理市  671000;2大理大学第一附属医院脊柱外科,云南省大理市  671000;3 药用美洲大蠊四川省重点实验室,四川省西昌市  615000;4大理大学临床医学院外科教研室,云南省大理市  671000
  • 收稿日期:2022-11-10 接受日期:2023-01-05 出版日期:2024-03-18 发布日期:2023-07-18
  • 通讯作者: 李绍波,硕士,教授,硕士生导师,大理大学临床医学院外科教研室,云南省大理市 671000
  • 作者简介:周邦瑜,男,1996年生,云南省普洱市人,拉祜族,主要从事骨科学脊髓损伤方面的研究。
  • 基金资助:
    云南省科技厅高校联合项目-面上项目(2019FH001-015),项目负责人:李绍波;云南省教育厅科学研究基金项目(2022Y865),项目负责人:周邦瑜;大理大学第一附属医院杰出中青年人才基金项目(DFYJC-202114),项目负责人:阮玉山

Effects of Periplaneta americana powder on motor function and autophagic protein Beclin-1 in rats undergoing spinal cord hemisection

Zhou Bangyu1, Li Jie1, Ruan Yushang2, Geng Funeng3, Li Shaobo4   

  1. 1Clinical Medicine Collage, Dali University, Dali 671000, Yunnan Province, China; 2Department of Spine Surgery, the First Affiliated Hospital of Dali University, Dali 671000, Yunnan Province, China; 3Sichuan Key Laboratory of Medicinal American Cockroach, Xichang 615000, Sichuan Province, China; 4Department of Surgery, Clinical Medicine College, Dali University, Dali 671000, Yunnan Province, China
  • Received:2022-11-10 Accepted:2023-01-05 Online:2024-03-18 Published:2023-07-18
  • Contact: Li Shaobo, Master, Professor, Master’s supervisor, Department of Surgery, Clinical Medicine College, Dali University, Dali 671000, Yunnan Province, China
  • About author:Zhou Bangyu, Clinical Medicine Collage, Dali University, Dali 671000, Yunnan Province, China
  • Supported by:
    General Joint Project of Yunnan Provincial Department of Science and Technology for Universities, No. 2019FH001-015 (to LSB); Scientific Research Fund of Yunnan Provincial Department of Education, No. 2022Y865 (to ZBY); Outstanding Young and Middle-aged Talents Fund of the First Affiliated Hospital of Dali University, No. DFYJC-202114 (to RYS)

摘要:


文题释义:

BBB评分:评分分为3部分,第一部分为0-7分,评判动物后肢各关节活动;第二部分为8-13分,评判后肢的步态及协调功能;第三部分为14-21分,评判运动中爪的精细动作。评分越高说明动物的后肢运动功能越好。
自噬蛋白Beclin-1:是自噬起始端的一个因子,在自噬中起到重要作用。Beclin-1与酵母自噬基因Atg6/Vps30是同源基因,在自噬起始阶段与Ⅲ类磷脂酰肌醇3-激酶、酵母同源Vps34、Vps15以及ATG14等相结合形成Ⅲ类磷脂酰肌醇3-激酶复合物,在自噬启动时发挥重要作用。自噬蛋白Beclin-1的表达升高表示着自噬水平增加。


背景:脊髓损伤有氧化应激、炎症、凋亡、自噬等机制参与其中,激活自噬可改善脊髓损伤后的神经运动功能,对脊髓起保护作用。

目的:探讨美洲大蠊研粉对脊髓半横断损伤大鼠后肢运动功能和损伤区域自噬蛋白Beclin-1的影响。
方法:取30只6-8周龄SD大鼠,采用随机数字表法分为3组,每组10只:假手术组仅打开椎板,暴露脊髓后缝合;生理盐水组与美洲大蠊组均建立左侧脊髓半横断损伤模型,术后第1天开始分别灌胃给予生理盐水与美洲大蠊研粉,连续给药14 d。术后6 h及1,3,7,14 d 行BBB评分,观察后肢运动功能的情况;给药14 d后处死大鼠,采用免疫组化染色、Western Blot检测、免疫荧光染色检测脊髓半横断损伤区域自噬蛋白Beclin-1的表达情况。

结果与结论:①随着术后时间的延长,生理盐水组、美洲大蠊组大鼠BBB评分逐渐升高;与假手术组比较,生理盐水组、美洲大蠊组术后6 h及1,3,7,14 d 的BBB评分均降低(P < 0.05);美洲大蠊组术后7,14 d 的BBB评分高于生理盐水组(P < 0.05);②免疫组化染色显示,假手术组Beclin-1呈弱阳性表达,主要位于胞浆;生理盐水组Beclin-1主要位于胞浆,可见部分核膜表达;美洲大蠊组Beclin-1主要位于胞浆,可见部分核膜表达;生理盐水组、美洲大蠊组Beclin-1阳性细胞比例多于假手术组(P < 0.05),美洲大蠊组Beclin-1阳性细胞比例多于生理盐水组(P < 0.05);③Western Blot检测与免疫荧光染色显示,生理盐水组、美洲大蠊组Beclin-1蛋白表达高于假手术组(P < 0.05),美洲大蠊组Beclin-1蛋白表达高于生理盐水组(P < 0.05);④结果表明,美洲大蠊研粉能够改善脊髓半横断损伤大鼠的后肢运动功能,机制可能是美洲大蠊研粉中的多糖类物质增加了自噬蛋白Beclin-1的表达。

https://orcid.org/0000-0001-7332-5162(周邦瑜) 

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

关键词: 脊髓损伤, 脊髓半横断损伤, 美洲大蠊研粉, 自噬, Beclin-1, 运动功能

Abstract: BACKGROUND: Spinal cord injury involves mechanisms such as oxidative stress, inflammation, apoptosis and autophagy. Activation of autophagy can improve neuromotor function after spinal cord injury and play a protective role in the spinal cord.
OBJECTIVE: To investigate the effects of Periplaneta americana powder on hindlimb motor function and the autophagy protein Beclin-1 in the injured site of rats after spinal cord hemisection. 
METHODS: Thirty Sprague-Dawley rats, 6-8 weeks of age, were randomly divided into three groups (n=10 per group). In the sham-operated group, the lamina was just opened to exposure the spinal cord followed by suturing. Normal saline group and Periplaneta americana powder group both underwent left hemisection of the spinal cord to prepare animal models of spinal cord hemisection. The normal saline group was continuously gavaged with normal saline for 14 days, and the Periplaneta americana powder group was continuously gavaged with Periplaneta americana powder for 14 days. The Basso Beattie Bresnahan scale score was performed at the 6th hour, 1st day, 3rd day, 7th day and 14th day after operation to observe the hindlimb motor function. After 14 days of administration, the rats were sacrificed and sampled. Immunohistochemistry, western blot and immunofluorescence were used to detect the expression of Beclin-1 in the injured site of the spinal cord after hemisection. 
RESULTS AND CONCLUSION: After operation, the Basso Beattie Bresnahan scale scores were gradually increased in the normal saline group and Periplaneta americana powder group. Compared with the sham-operated group, the Basso Beattie Bresnahan scale scores were significantly reduced in the normal saline group and Periplaneta americana powder group at the 6th hour, 1st day, 3rd day, 7th day and 14th day after operation (P < 0.05). The Basso Beattie Bresnahan scale scores in the Periplaneta americana powder group were significantly higher than those in the normal saline group at the 7th and 14th days after operation 
(P < 0.05). Immunohistochemical staining showed that Beclin-1 was weakly positive in the sham-operated group, mainly expressed in the cytoplasm; in the normal saline group, Beclin-1 was mainly expressed in the cytoplasm and partially expressed in the nuclear membrane; in the Periplaneta americana powder group, Beclin-1 was mainly expressed in the cytoplasm and partially expressed in the nuclear membrane. The proportion of Beclin-1 positive cells was higher in the normal saline and Periplaneta americana powder groups than in the sham-operated group (P < 0.05), while the proportion of Beclin-1 positive cells was higher in the Periplaneta americana powder group than in the normal saline group (P < 0.05). Western blot assay and immunofluorescence staining showed that the Beclin-1 protein expression was higher in the normal saline and Periplaneta americana powder groups than in the sham-operated group (P < 0.05), and moreover, the Beclin-1 protein expression was higher in the Periplaneta americana powder group than in the normal saline group (P < 0.05). To conclude, Periplaneta americana powder could improve the hindlimb motor function of rats with spinal cord hemisection injury, and the mechanism may be that polysaccharides in the Periplaneta americana powder increase the expression of Beclin-1.

Key words: spinal cord injury, spinal cord hemisection injury, Periplaneta americana powder, autophagy, Beclin-1, motor function

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