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广西壮族自治区中医药研究院 广西中药质量标准研究重点实验室,南宁 530022
赖克道,副主任药师,从事中药药理学研究,Tel:0771-5830012,E-mail:laikedao@163.com
何俊慧,硕士,助理研究员,从事中药药理学研究,Tel:0771-5869102,E-mail:hejunhui202109@163.com
收稿日期:2021-09-14,
网络出版日期:2021-11-25,
纸质出版日期:2022-03-05
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赖克道,李冬梅,韦桂宁等.基于CREB/BDNF通路探讨鸡血藤总黄酮对抑郁大鼠海马神经可塑性的影响[J].中国实验方剂学杂志,2022,28(05):55-61.
LAI Ke-dao,LI Dong-mei,WEI Gui-ning,et al.Total Flavones of Spatholobi Caulis Regulate Hippocampal Neuroplasticity in Depressed Rats Through CREB/BDNF Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(05):55-61.
赖克道,李冬梅,韦桂宁等.基于CREB/BDNF通路探讨鸡血藤总黄酮对抑郁大鼠海马神经可塑性的影响[J].中国实验方剂学杂志,2022,28(05):55-61. DOI: 10.13422/j.cnki.syfjx.20220205.
LAI Ke-dao,LI Dong-mei,WEI Gui-ning,et al.Total Flavones of Spatholobi Caulis Regulate Hippocampal Neuroplasticity in Depressed Rats Through CREB/BDNF Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(05):55-61. DOI: 10.13422/j.cnki.syfjx.20220205.
目的
2
观察鸡血藤总黄酮的抗抑郁作用,并探讨其作用机制。
方法
2
50只KM小鼠随机分为正常组,鸡血藤总黄酮高、中、低剂量组(1,0.5,0.25 g·kg
-1
),灌胃给予相应剂量药物,连续给药12 d,末次给药1 h后记录小鼠强迫游泳不动时间和悬尾不动时间。SD大鼠随机分为正常组,模型组,氟西汀组(5 mg·kg
-1
),鸡血藤总黄酮高、低剂量组(1,0.25 g·kg
-1
),每天随机给予2种不同刺激,诱导慢性不可预知应激模型,连续给药21 d,实验结束后,通过酶联免疫吸附测定法(ELISA)检测大鼠血清中神经递质及炎症因子的水平;通过苏木素-伊红(HE),尼氏(Nissl)染色观察大鼠海马神经元的变化;通过实时荧光定量聚合酶链式反应(Real-time PCR)检测大鼠海马组织中核转录因子-
κ
B(NF-
κ
B),肿瘤坏死因子-
α
(TNF-
α
)mRNA的表达水平;通过蛋白免疫印迹法(Western blot)检测大鼠海马组织中C反应元件结合蛋白(CREB),磷酸化(p-)CREB,脑源性神经营养因子(BDNF)的表达水平
。
结果
2
与正常组比较,鸡血藤总黄酮能明显缩短小鼠的悬尾和游泳不动时间(
P
<
0.05);与正常组比较,模型组大鼠蔗糖摄入量和旷野活动量减少(
P
<
0.01),5-HT,DA,NE的水平降低(
P
<
0.05,
P
<
0.01),MAO,IL-6,TNF-
α
的水平降低(
P
<
0.05,
P
<
0.01),神经元受损,TNF-
α
,NF-
κ
B mRNA水平升高(
P
<
0.01),BDNF,CREB蛋白表达降低(
P
<
0.05)。与模型组比较,鸡血藤总黄酮能明显升高大鼠蔗糖摄入量和旷野活动量(
P
<
0.05);升高血清中5-HT,DA,NE的水平(
P
<
0.05,
P
<
0.01),降低血清中MAO,IL-6,TNF-
α
的水平(
P
<
0.05,
P
<
0.01);降低大鼠海马组织中炎症因子NF-
κ
B,TNF-
α
mRNA的水平(
P
<
0.01);升高大鼠海马组织中CREB,BFNF蛋白的表达(
P
<
0.05,
P
<
0.01);改善大鼠海马组织的病理症状。
结论
2
鸡血藤总黄酮通过激活CREB/BDNF信号通路,改善大鼠海马神经元,减轻抑郁病理损伤,从而减轻抑郁症状。
Objective
2
To investigate the effect and mechanism of total flavones of Spatholobi Caulis
(TFSC) against depression in rats.
Method
2
The fifty KM mice were randomly divided into the normal group and high-, medium-, and low-dose (1, 0.5, 0.25 g·kg
-1
) TFSC groups and gavaged with the corresponding drugs for 12 successive days. One hour after the last administration, the immobility time in forced swimming test and tail suspension test was recorded. The SD rats were randomly divided into the normal group, model group, fluoxetine (5 mg·kg
-1
) group, and high- and low-dose (1, 0.25 g·kg
-1
) TFSC groups. Following the exposure of rats to two different kinds of stimuli daily for inducing chronic unpredictable stress, they were administered with the corresponding drugs for 21 d. After the experiment, the levels of serum neurotransmitters and inflammatory factors in rats were detected by enzyme-linked immunosorbent assay (ELISA). The changes in hippocampal neurons of rats were observed by hematoxylin-eosin (HE) and Nissl staining. The mRNA expression levels of nuclear factor-
κ
B (NF-
κ
B) and tumor necrosis factor-
α
(TNF-
α
) in the hippocampus of rats were detected by real-time fluorescence quantitative polymerase chain reaction (Real-time PCR), and the protein expression levels of cAMP-response element binding protein (CREB), phosphorylated CREB (p-CREB), and brain-derived neurotrophic factor (BDNF) in hippocampal tissues by Western blot.
Result
2
Compared with the normal group, TFSC significantly shortened the immobility time of mice in tail suspension and swimming tests (
P
<
0.05). Compared with the normal group, the model group exhibited reduced sucrose intake and wilderness activity (
P
<
0.01), decreased 5-HT, DA, NE (
P
<
0.05,
P
<
0.01), MAO, IL-6, TNF-
α
(
P
<
0.05,
P
<
0.01), damaged neurons, increased mRNA levels of TNF-
α
and NF-
κ
B (
P
<
0.01), and down-regulated BDNF and CREB protein expression (
P
<
0.05). Compared with the model group, TFSC significantly enhanced sucrose intake and wilderness activity of rats (
P
<
0.05), increased the serum 5-HT, DA and NE (
P
<
0.05,
P
<
0.01), and decreased the serum MAO, IL-6, and TNF-
α
(
P
<
0.05,
P
<
0.01) as well as NF-
κ
B and TNF-
α
mRNA expression (
P
<
0.01), up-regulated the protein expression levels of BDNF and CREB (
P
<
0.01), and improved the pathological symptoms of hippocampus.
Conclusion
2
TFSC improved the hippocampal neurons of rats via CREB/BDNF signaling pathway and reduced depressive pathological damage, thus relieving depression.
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