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1.中国中医科学院 中医基础理论研究所,北京 100700
2.开封市中医院,河南 开封 475000
3.北京中医药大学,北京 100029
巩子汉,在读博士,从事中医脾胃病及中医药方证相关基础研究,E-mail:1217253647@qq.com
* 高静静,硕士,主治医师,从事心身医学研究,E-mail:578194396qq.com; *
岳广欣,博士,研究员,博士生导师,从事中医方证及精神行为病症的中医病理生理基础及防治研究,E-mail:yuegx73@hotmail.com
收稿日期:2021-06-09,
网络出版日期:2021-08-31,
纸质出版日期:2021-11-05
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巩子汉,高静静,佘楷杰等.温阳、解郁及温阳解郁方对LPS“二次应激”诱发的抑郁样行为小鼠海马小胶质细胞的影响[J].中国实验方剂学杂志,2021,27(21):55-62.
GONG Zi-han,GAO Jing-jing,SHE Kai-jie,et al.Effect of Wenyang, Jieyu, and Wenyang Jieyu Prescriptions on Hippocampal Microglia of Mice with Depression-Like Behavior Induced by Secondary LPS Exposure[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(21):55-62.
巩子汉,高静静,佘楷杰等.温阳、解郁及温阳解郁方对LPS“二次应激”诱发的抑郁样行为小鼠海马小胶质细胞的影响[J].中国实验方剂学杂志,2021,27(21):55-62. DOI: 10.13422/j.cnki.syfjx.20212001.
GONG Zi-han,GAO Jing-jing,SHE Kai-jie,et al.Effect of Wenyang, Jieyu, and Wenyang Jieyu Prescriptions on Hippocampal Microglia of Mice with Depression-Like Behavior Induced by Secondary LPS Exposure[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(21):55-62. DOI: 10.13422/j.cnki.syfjx.20212001.
目的
2
观察母婴分离(MS)联合脂多糖(LPS)应激后抑郁样行为小鼠海马区小胶质细胞活化及炎症因子的表达情况,从温阳、解郁及温阳解郁二方合用的角度探讨温阳解郁法抗抑郁的可能机制。
方法
2
将70只仔鼠随机分为正常组(10只)、LPS应激组(LPS,10只)和造模组(MS,50只),造模组小鼠在产后第5天(PD
5
)-PD
14
进行8 h·d
-1
的母婴分离,后将造模组分为母婴分离+脂多糖应激组(MS+LPS),温阳组(WY),解郁组(JY),温阳解郁组(WYJY)及氟西汀组(FLU),每组10只。将仔鼠出生日期记为PD
0
,正常,LPS及MS+LPS组小鼠于PD
21
-PD
90
饲喂正常饲料,其余各组给予对应的药混饲料喂养,且于PD
91
给予脂多糖腹腔注射7 d,建立抑郁症小鼠模型。采用旷场,O迷宫和社会交互实验检测各组小鼠抑郁样行为;免疫组化法观察海马组织小胶质细胞钙结合蛋白-1(Iba-1)蛋白表达;实时荧光定量聚合酶链式反应法检测白细胞介素-1
β
(IL-1
β
),白细胞介素-6(IL-6),肿瘤坏死因子-
α
(TNF-
α
),Iba-1及糖皮质激素受体(GR) mRNA表达量。
结果
2
与正常组比较,LPS组小鼠5 min中心区停留时间有减少趋势、运动总路程显著减少(
P
<
0.01),活动总路程显著减少(
P
<
0.01),MS+LPS组小鼠开放臂活动时间及活动总路程明显减少(
P
<
0.05,
P
<
0.01),训练、辨别探查时间显著升高(
P
<
0.01),LPS,MS+LPS组小鼠海马CA1区Iba-1表达显著升高(
P
<
0.01);与LPS组比较,MS+LPS组小鼠5 min运动总路程明显增长(
P
<
0.05),训练、辨别探查时间明显升高(
P
<
0.05,
P
<
0.01),海马CA1区Iba-1表达显著升高(
P
<
0.01);与MS+LPS组比较,各给药组小鼠5 min运动总路程均明显减少(
P
<
0.01),训练探查时间均显著降低(
P
<
0.05,
P
<
0.01),JY,WYJY,FLU组小鼠辨别探查时间均显著降低(
P
<
0.01),各给药组小鼠海马CA1区Iba-1表达显著降低(
P
<
0.01)。
结论
2
温阳解郁法可能通过抑制抑郁症小鼠海马区小胶质细胞的激活,降低IL-1
β
,IL-6,TNF-
α
等炎症因子的表达,进而抑制抑郁症发生及发展。
objective
2
To observe the activation of microglia and the expression of inflammatory factors in hippocampus of mice with depression-like behavior after mother-infant separation (MS) combined with lipopolysaccharide (LPS) stress, and to explore the possible anti-depression mechanisms of Wenyang (WY), Jieyu (JY), and Wenyang Jieyu (WYJY) prescriptions from the perspective of warming Yang and relieving depression.
Method
2
Seventy offspring mice were randomly divided into a normal group (
n
=10), a LPS stress group (
n
=10), and a modeling group (
n
=50). After undergoing 8 h·d
-1
mother-infant separation during postnatal day 5 (PD
5
)–PD
14
, mice in the modeling group were further divided into the MS + LPS group, WY group, JY group, WYJY group, and fluoxetine (FLU) group, with 10 in each group. The birth date of the offspring mice was recorded as PD
0
. The mice in the normal, LPS, and MS + LPS groups were fed a normal diet during PD
21
–PD
90
, while those in the other groups were treated with the mixtures of corresponding drugs and feed, followed by seven-day intraperitoneal injection of LPS since PD
91
for inducing depression. The depression-like behavior of mice in each group was detected in the open-field, O-maze, and social interaction tests. The protein expression of microglia-specific ionized calcium-binding adaptor molecule 1 (Iba-1) in the hippocampus was assayed by immunohistochemistry, and the mRNA expression of interleukin-1
β
(IL-1
β
), interleukin-6 (IL-6), tumor necrosis factor-
α
(TNF-
α
), Iba-1, and glucocorticoid receptor (GR) by real-time fluorescence quantitative PCR (Real-time PCR).
Result
2
Compared with the normal group, the LPS group exhibited significantly reduced residence time at the central area within 5 min (
P
<
0.01) and shortened total exercise distance (
P
<
0.01). In the MS + LPS group, the open-arm activity time and the total activity distance decreased significantly (
P
<
0.01,
P
<
0.05), whereas the training, discrimination and exploration time increased significantly (
P
<
0.01). The expression of Iba-1 in hippocampal CA1 region of mice in the LPS and MS + LPS groups was remarkably elevated (
P
<
0.01). Compared with the LPS group, the MS + LPS group displayed significantly prolonged distance of 5-min exercise (
P
<
0.05), increased training, discrimination and exploration time (
P
<
0.05,
P
<
0.01), and up-regulated Iba-1 expression in hippocampal CA1 area (
P
<
0.01). As revealed by comparison with the MS + LPS group, both the total 5-min exercise distance (
P
<
0.01) and the training and discrimination time (
P
<
0.01,
P
<
0.05) of mice in each administration group was significantly shortened. The discrimination and exploration time of mice in the JY, WYJY, and FLU groups was significantly reduced (
P
<
0.01), and the expression of Iba-1 in hippocampal CA1 region of mice in each administration group was significantly down-regulated (
P
<
0.01).
Conclusion
2
The warming Yang and relieving depression method helps to inhibit the occurrence and development of depression due to its efficacy in activating microglia in hippocampus of depression mice and lowering the expression of IL-1
β
, IL-6, and TNF-
α
.
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