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1.安庆医药高等专科学校医学院,安徽安庆246052
2.安徽中医药大学针灸推拿学院, 合肥230012
3.安庆师范大学体育学院,安徽安庆246113
刘芳,硕士研究生,讲师,研究方向:针灸康复防治脑血管病。E-mail:710727472@qq.com
唐巍,教授,博士生导师,研究方向:针灸康复防治脑血管病。E-mail:tangwei2633@163.com
收稿日期:2022-10-18,
修回日期:2023-01-05,
纸质出版日期:2023-08-25
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刘芳,李梦醒,王玉等.艾灸督脉组穴对血管性痴呆大鼠海马CA1区肌醇需要酶1/X-盒连接蛋白1通路的影响[J].针刺研究,2023,48(08):746-753.
LIU Fang,LI Meng-xing,WANG Yu,et al.Effect of moxibustion on inositol requiring enzyme 1 / X-box binding protein 1 pathway in hippocampal CA1 region of rats with vascular dementia[J].Acupuncture Research,2023,48(08):746-753.
刘芳,李梦醒,王玉等.艾灸督脉组穴对血管性痴呆大鼠海马CA1区肌醇需要酶1/X-盒连接蛋白1通路的影响[J].针刺研究,2023,48(08):746-753. DOI: 10.13702/j.1000-0607.20221167.
LIU Fang,LI Meng-xing,WANG Yu,et al.Effect of moxibustion on inositol requiring enzyme 1 / X-box binding protein 1 pathway in hippocampal CA1 region of rats with vascular dementia[J].Acupuncture Research,2023,48(08):746-753. DOI: 10.13702/j.1000-0607.20221167.
目的
2
观察艾灸督脉组穴对血管性痴呆(VD)大鼠海马CA1区肌醇需要酶1(IRE1)/X-盒连接蛋白1(XBP1)通路的影响,探讨艾灸治疗VD的作用机制。
方法
2
将雄性SD大鼠随机分为正常组、假手术组、模型组、艾灸组和西药组,每组12只。采用双侧颈总动脉永久结扎法复制VD模型。艾灸组取“百会”“大椎”“风府”温和灸,20 min/次,1次/d,干预6 d休息1 d,治疗4周。西药组给予尼莫地平2 mg·kg
-1
·d
-1
分3次灌胃,连续4周。采用Morris水迷宫实验检测造模前后及干预后大鼠的学习记忆能力,TUNEL染色法检测海马CA1区神经细胞凋亡率,Western blot 法和实时荧光定量PCR法检测海马CA1区IRE1、XBP1、B细胞淋巴瘤/白血病-2(Bcl-2)、Bcl-2相关X蛋白(Bax)蛋白及mRNA的表达水平。
结果
2
与假手术组比较,模型组大鼠平均逃避潜伏期明显延长(
P
<
0.01),穿越原平台次数明显减少(
P
<
0.01),海马CA1区神经细胞凋亡率明显升高(
P
<
0.01),IRE1、XBP1、Bax蛋白和mRNA表达水平明显升高(
P
<
0.01),Bcl-2蛋白和mRNA表达水平明显降低(
P
<
0.01)。治疗后与模型组比较,艾灸组和西药组平均逃避潜伏期均明显缩短(
P
<
0.01),穿越原平台次数增加(
P
<
0.05),海马CA1区神经细胞凋亡率明显降低(
P
<
0.01),IRE1、XBP1、Bax蛋白和mRNA表达水平均降低(
P
<
0.05,
P
<
0.01),Bcl-2蛋白和mRNA表达水平均升高(
P
<
0.05,
P
<
0.01)。以上指标艾灸组与西药组比较差异无统计学意义。
结论
2
艾灸督脉组穴可提高VD大鼠认知功能,其作用机制可能与调控IRE1/XBP1通路,抑制促凋亡蛋白Bax释放,促进抗凋亡蛋白Bcl-2表达,进而抑制海马神经细胞凋亡有关。
Objective
2
To observe the effect of moxibustion at Governor Vessel acupoints on inositol requiring enzyme 1 (IRE1) / X-box binding protein 1 (XBP1) pathway in hippocampal CA1 region of rats with vascular dementia (VD), so as to explore its mechanisms in the treatment of VD.
Methods
2
Male SD rats were randomly divided into normal, sham operation, model, moxibustion (Moxi) and medication groups (n=12). The VD model was established by permanent ligation of bilateral common carotid arteries. For rats of the Moxi group, mild moxibustion was given to “Baihui” (GV20), “Dazhui” (GV14) and “Fengfu” (GV16) for 20 min each point, once a day for consecutive 6 days per week, for a total of 4 weeks. For rats of the medication group, intragastric perfusion of nimodipine was given 3 times each day with total dose of 2 mg·kg
-1
·d
-1
for 4 weeks. Morris water maze test was used to detect the learning and memory ability of rats before and after modeling as well as after intervention. The apoptosis rate of nerve cells in hippocampal CA1 region was detected by TUNEL staining. The proteins and mRNA expression levels of IRE1, XBP1, B-cell lymphoma/leukemia-2 (Bcl-2), Bcl-2 associated X protein (Bax) in hippocampal CA1 region were detected by Western blot and real-time quantitative PCR, respectively.
Results
2
Compared with the sham operation group, the average escape latency was significantly prolonged (
P
<
0.01), the number of times crossing the original platform was significantly reduced (
P
<
0.01), the apoptosis rate of nerve cells in hippocampal CA1 region was significantly increased (
P
<
0.01), the proteins and mRNA expression levels of IRE1, XBP1 and Bax were significantly increased (
P
<
0.01), and the expression levels of Bcl-2 protein and mRNA were significantly decreased (
P
<
0.01) in rats of the model group. After treatment, compared with the model group, the average escape latency was significantly shortened (
P
<
0.01), the number of times crossing the original platform was increased (
P
<
0.05), the apoptosis rate of nerve cells in hippocampal CA1 region was significantly decreased (
P
<
0.01), the protein and mRNA expression levels of IRE1, XBP1 and Bax were decreased (
P
<
0.05,
P
<
0.01),and the expression levels of Bcl-2 protein and mRNA were increased (
P
<
0.05,
P
<
0.01) in rats of the Moxi group and medication group. There was no significant difference in the above indexes between the Moxi group and the medication group.
Conclusion
2
Moxibustion at the acupoints of Governor Vessel can improve the cognitive function of VD rats, and its mechanism may be related to regulating IRE1/XBP1 pathway, inhibiting the release of pro-apoptotic protein Bax, increasing the expression of anti-apoptotic protein Bcl-2, and thus inhibiting the apoptosis of hippocampal nerve cells.
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