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甘肃中医药大学 甘肃省中医方药挖掘与创新转化重点实验室,兰州 730000
韦春昕,在读硕士,从事方剂配伍规律及复方配伍的优化研究,E-mail:529193002@qq.com
安耀荣,硕士,教授,从事方剂配伍规律及复方配伍的优化研究,E-mail:anyr@gszy.edu.cn
纸质出版日期:2024-02-20,
网络出版日期:2023-12-14,
收稿日期:2023-05-29,
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韦春昕,胡亦明,黄仕琦等.基于p38 MAPK/NF-κB信号通路探讨柴胡加龙骨牡蛎汤干预广泛性焦虑模型大鼠的作用机制[J].中国实验方剂学杂志,2024,30(04):114-123.
WEI Chunxin,HU Yiming,HUANG Shiqi,et al.Chaihu Longgu Mulitang Relieves Generalized Anxiety Disorder in Rats via p38 MAPK/NF-κB Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(04):114-123.
韦春昕,胡亦明,黄仕琦等.基于p38 MAPK/NF-κB信号通路探讨柴胡加龙骨牡蛎汤干预广泛性焦虑模型大鼠的作用机制[J].中国实验方剂学杂志,2024,30(04):114-123. DOI: 10.13422/j.cnki.syfjx.20232037.
WEI Chunxin,HU Yiming,HUANG Shiqi,et al.Chaihu Longgu Mulitang Relieves Generalized Anxiety Disorder in Rats via p38 MAPK/NF-κB Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(04):114-123. DOI: 10.13422/j.cnki.syfjx.20232037.
目的
2
研究柴胡加龙骨牡蛎汤是否可以通过调控抑制p38丝裂原活化蛋白激酶/核转录因子-
κ
B(p38 MAPK/NF-
κ
B)信号通路抑制广泛性焦虑(GAD)大鼠下丘脑区炎症反应,改善GAD大鼠的焦虑样行为,缓解GAD大鼠的焦虑症状。
方法
2
74只Wistar大鼠随机选择12只作为空白组,剩余大鼠采用慢性束缚应激法制造GAD模型大鼠,造模14 d后进行旷场实验(OFT)和高架十字迷宫实验(PMT)检测各组大鼠焦虑样行为,筛选造模成功的大鼠60只,随机分为模型组、柴胡加龙骨牡蛎汤低、中、高剂量组(6、12、24 g·kg
-1
)和地西泮组(1 mg·kg
-1
),每组12只,连续14 d灌胃相应剂量柴胡加龙骨牡蛎汤和地西泮,给药14 d后继续通过旷场和十字迷宫实验观察大鼠焦虑样行为的变化;酶联免疫吸附测定法(ELISA)检测大鼠下丘脑和血清中肿瘤坏死因子-
α
(TNF-
α)
、白细胞介素IL-6(IL-6)、白细胞介素-1
β
(IL-1
β)
水平;实时荧光定量聚合酶链式反应(Real-time PCR)检测p38 MAPK、NF-
κ
B p65、NF-
κ
B抑制因子
α
(I
κ
B
α
)、钙结合蛋白(Iba-1)mRNA的水平;蛋白免疫印迹法(Western blot)检测大鼠下丘脑p38 MAPK、磷酸化(p)-p38 MAPK、NF-
κ
B p65、p-NF-
κ
B p65、I
κ
B
α
蛋白的表达水平;免疫荧光法检测大鼠下丘脑小胶质细胞激活蛋白Iba-1表达情况。
结果
2
与空白组比较,模型组大鼠体质量较轻且皮毛散乱黯黄、易躁易怒、喜在角落蛰伏,OFT边缘运动距离和边缘运动时间显著增加(
P
<
0.01),PMT开臂运动距离、开臂运动时间及进入开臂次数显著减少(
P
<
0.01),下丘脑室旁核小胶质细胞激活标志蛋白Iba-1荧光强度显著升高(
P
<
0.01),血清和下丘脑中IL-1
β
、IL-6、TNF-
α
显著增多(
P
<
0.01),下丘脑p38 MAPK、NF-
κ
B p65、p-p38 MAPK、p-NF-
κ
B p65、Iba-1蛋白及mRNA表达明显升高(
P
<
0.05,
P
<
0.01),I
κ
B
α
蛋白及mRNA表达显著减低(
P
<
0.01)。与模型组比较,柴胡加龙骨牡蛎汤中、高剂量组和地西泮组大鼠体质量较重且皮毛较为光滑、活动较为正常,OFT边缘运动距离和时间明显减少(
P
<
0.05,
P
<
0.01),PMT开臂运动距离及开臂运动时间明显增加(
P
<
0.05,
P
<
0.01),下丘脑小胶质细胞激活标志蛋白Iba-1荧光强度降低(
P
<
0.05,
P
<
0.01),血清和下丘脑组织中IL-1
β
、IL-6、TNF-
α
明显降低(
P
<
0.05,
P
<
0.01),下丘脑p38 MAPK、NF-
κ
B p65、p-p38 MAPK、p-NF-
κ
B p65、Iba-1蛋白及mRNA表达明显降低(
P
<
0.05,
P
<
0.01),I
κ
B
α
蛋白及mRNA表达明显升高(
P
<
0.05,
P
<
0.01)。
结论
2
柴胡加龙骨牡蛎汤可通过抑制p38 MAPK/NF-
κ
B信号通路,降低GAD大鼠下丘脑内小胶质细胞活化度、下调促炎因子水平,发挥改善大鼠焦虑样行为、缓解大鼠焦虑状态的作用。
Objective
2
To study whether Chaihu Longgu Mulitang can inhibit hypothalamic inflammation, mitigate anxiety-like behavior, and alleviate anxiety symptoms by regulating the p38 mitogen-activated protein kinase/nuclear factor-
κ
B (p38 MAPK/NF-
κ
B) signaling pathway in the rat model of generalized anxiety disorder (GAD).
Method
2
Twelve out of 74 Wistar rats were randomly selected as the blank group, and the remaining rats were subjected to chronic restraint stress for the modeling of GAD. The open field test (OFT) and elevated Porteus maze test (PMT) were conducted 14 days after modeling to detect the anxiety-like behaviors. Sixty successfully modeled rats were selected and randomized into model, low-, medium-, and high-dose (6, 12, and 24 g·kg
-1
, respectively) Chaihu Longgu Mulitang, and diazepam (1 mg·kg
-1
) groups (
n
=12) and administrated with corresponding drugs for 14 consecutive days. OFT and PMT were then carried out to examine the anxiety-like behaviors of the rats. The levels of tumor necrosis factor-
α
(TNF-
α
), interleukin-6 (IL-6), and interleukin-1
β
(IL-1
β
) in the hypothalamus and serum of rats were determined by the enzyme-linked immunosorbent assay (ELISA). Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR)was conducted to determine the mRNA levels of p38 MAPK, NF-
κ
B p65, nuclear factor
κ
B inhibitor
α
(I
κ
B
α
), and ionized calcium binding adaptor molecule 1 (Iba-1). The protein levels of p38 MAPK, phosphorylated (p)-p38 MAPK, NF-
κ
B p65, p-NF-
κ
B p65, and I
κ
B
α
in the hypothalamus of rats were determined by Western blot. The expression of Iba-1 in the hypothalamic microglia was detected by immunofluorescence assay.
Result
2
Compared with the blank group, the model group had decreased body weight, scattered dark yellow fur, increased irritability, and preference to hibernation in the corner. In addition, the modeled rats showed increased edge movement distance and time in OFT (
P
<
0.01) and decreased movement distance and time and the number of entries in the open arm in PMT (
P
<
0.01). The modeling increased the fluorescence intensity of Iba-1 in paraventricular nucleus of hypothalamus (
P
<
0.01), elevated the levels of IL-1
β
, IL-6, and TNF-
α
in the serum and hypothalamus (
P
<
0.01), up-regulated the protein and mRNA levels of p38 MAPK, NF-
κ
B p65, p-p38 MAPK, p-NF-
κ
B p65, and Iba-1 (
P
<
0.05,
P
<
0.01), and down-regulated the protein and mRNA levels of I
κ
B
α
(
P
<
0.01) in the hypothalamus. Compared with the model group, medium- and high-dose Chaihu Longgu Mulitang and diazepam increased the body weight, improved the fur and behaviors, decreased the edge movement distance and time in OFT (
P
<
0.05,
P
<
0.01), and increased the movement distance and time in the open arm in PMT (
P
<
0.05,
P
<
0.01). Furthermore, they decreased the fluorescence intensity of Iba-1 in hypothalamic microglia (
P
<
0.05,
P
<
0.01), lowered the levels of IL-1
β
, IL-6, and TNF-
α
in the serum and hypothalamic tissue (
P
<
0.05,
P
<
0.01), down-regulated the mRNA and protein levels of p38 MAPK, NF-
κ
B p65, p-p38 MAPK, p-NF-
κ
B p65, and Iba-1 (
P
<
0.05,
P
<
0.01), and up-regulated the mRNA and protein levels of I
κ
B
α
(
P
<
0.05,
P
<
0.01) in the hypothalamus.
Conclusion
2
Chaihu Longgu Mulitang can mitigate anxiety-like behaviors and relieve anxiety in GAD rats by inhibiting the p38 MAPK/NF-
κ
B signaling pathway and reducing the activation of microglia and the levels of pro-inflammatory cytokines in the hypothalamus.
广泛性焦虑症柴胡加龙骨牡蛎汤炎症反应p38丝裂原活化蛋白激酶/核转录因子-κB(p38 MAPK/NF-κB)信号通路小胶质细胞
generalized anxiety disorderChaihu Longgu Mulitanginflammatory responsep38 mitogen-activated protein kinase/nuclear factor-κB (p38 MAPK/NF-κB) signaling pathwaymicroglia
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