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1.北京城市学院 生物医药学部,北京 100094
2.北京中医药大学,北京 100029
3.北京厚成医药科技开发有限公司,北京 100044
4.广州中医药大学,广州 510006
Received:20 October 2021,
Published Online:08 March 2022,
Published:05 May 2022
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孙晓丽,张锴镔,郭淑贞等.龙生蛭胶囊对血管痴呆大鼠认知功能的影响及作用机制[J].中国实验方剂学杂志,2022,28(09):72-79.
SUN Xiao-li,ZHANG Kai-bin,GUO Shu-zhen,et al.Longshengzhi Capsules Improves Cognitive Function of Vascular Dementia Model Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(09):72-79.
孙晓丽,张锴镔,郭淑贞等.龙生蛭胶囊对血管痴呆大鼠认知功能的影响及作用机制[J].中国实验方剂学杂志,2022,28(09):72-79. DOI: 10.13422/j.cnki.syfjx.20220936.
SUN Xiao-li,ZHANG Kai-bin,GUO Shu-zhen,et al.Longshengzhi Capsules Improves Cognitive Function of Vascular Dementia Model Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(09):72-79. DOI: 10.13422/j.cnki.syfjx.20220936.
目的
2
研究龙生蛭胶囊对血管性痴呆(VD)大鼠的认知功能的影响及其可能的作用机制。
方法
2
采用双侧颈总动脉永久结扎法造血管性痴呆模型,并将造模大鼠随机分为模型组(灌胃生理盐水)、喜得镇组(0.54 mg·kg
-1
)、龙生蛭胶囊高、中、低剂量组(2.16、1.08、0.54 g·kg
-1
),同时设置假手术组(灌胃生理盐水),每组大鼠15只,连续灌胃给药4周。Morris水迷宫实验测定大鼠的认知功能,苏木素-伊红(HE)染色考察大鼠脑组织海马区病理变化。检测大鼠血清中氧化应激指标超氧化物歧化酶(SOD)、丙二醛(MDA)和谷胱甘肽过氧化物酶(GSH-Px)的变化和炎症因子肿瘤坏死因子-
α
(TNF-
α
)、白细胞介素-6(IL-6)、IL-1
β
的水平;蛋白免疫印迹法(Western blot)检测脑组织中炎症蛋白、凋亡蛋白、基质金属蛋白酶-9(MMP-9)和黏附分子-1(ICAM-1)的蛋白表达。
结果
2
Morris水迷宫结果显示,与假手术组比较,模型组大鼠逃避潜伏期和明显延长,且穿越平台次数明显降低;与模型组比较,龙生蛭胶囊高、中剂量组大鼠逃避潜伏期所用时间明显缩短,大鼠穿越平台次数明显增多。与假手术组比较,模型组大鼠血清SOD和GSH-Px水平明显降低(
P
<
0.05,
P
<
0.01),MDA水平明显升高(
P
<
0.05),TNF-
α
、IL-6和IL-1
β
水平显著升高(
P
<
0.01);与模型组比较,龙生蛭胶囊高剂量组大鼠血清中SOD水平明显升高(
P
<
0.05),龙生蛭胶囊高、中、低剂量组大鼠血清中GSH-Px水平明显升高(
P
<
0.05,
P
<
0.01),MDA水平明显降低(
P
<
0.05),TNF-
α
、IL-6和IL-1
β
水平明显降低(
P
<
0.05,
P
<
0.01)。HE染色发现,龙生蛭胶囊能够改善VD大鼠海马区病理损伤。Western blot结果显示,与假手术组比较,模型组大鼠脑组织Bax、NF-
κ
B、MMP-9及ICAM-1蛋白表达均显著升高(
P
<
0.01),Bcl-2、Akt和p-Akt蛋白表达均明显降低(
P
<
0.05,
P
<
0.01),与模型组比较,龙生蛭胶囊高、中、低剂量组明显降低Bax、NF-
κ
B、MMP-9及ICAM-1蛋白表达(
P
<
0.05,
P
<
0.01),明显提高Bcl-2蛋白表达(
P
<
0.05,
P
<
0.01),龙生蛭胶囊高、中剂量组Akt蛋白表达明显升高(
P
<
0.05),龙生蛭胶囊高剂量组组p-Akt蛋白表达显著升高(
P
<
0.01)。
结论
2
龙生蛭胶囊可改善VD大鼠的认知功能,其机制可能与对氧化应激、炎症反应和细胞凋亡的抑制有关。
Objective
2
To study the effect of Longshengzhi capsules on the cognitive function of vascular dementia (VD) rats and reveal the underlying mechanism.
Method
2
A VD rat model was established by permanent ligation of bilateral common carotid arteries. The model rats were randomly assigned into the model group (normal saline for gavage), Hydergine (0.54 mg·kg
-1
) group, and high-, medium-, and low-dose (2.16, 1.08, and 0.54 g·kg
-1
, respectively) Longshengzhi capsules groups, with 15 rats each group. Additionally, a sham group (normal saline for gavage) was designed in this study. Morris water maze test was conducted in the last week. Hematoxylin-eosin (HE) staining was employed for observation of the pathological changes in the hippocampal area of rat brain. Serum oxidative stress indicators including superoxide dismutase (SOD), malondialdehyde (MDA), and glutathione peroxidase (GSH-Px) were examined. The levels of tumor necrosis factor-
α
(TNF-
α
), interleukin-6 (IL-6), and interleukin-1
β
(IL-1
β
) were determined by enzyme-linked immunosorbent assay (ELISA). The expression levels of B cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax), protein kinase B (Akt), p-Akt, nuclear factor-
κ
B (NF-
κ
B), intercellular cell adhesion molecule-1 (ICAM-1), and matrix metallopeptidase-9 (MMP-9) were determined by Western blot.
Result
2
Morris water maze results showed that compared with sham operation group, the escape latency of rats in model group was significantly prolonged, and the number of crossing platform was significantly reduced. Compared with model group, the time of escape latency in Longshengzhi capsules high- and medium-dose groups was significantly shortened, and the number of crossing platform was significantly increased. Compared with sham operation group, SOD and GSH-Px levels in model group were significantly decreased (
P
<
0.05,
P
<
0.01), MDA levels were significantly increased (
P
<
0.05), TNF-
α
, IL-6 and IL-1
β
levels were significantly increased (
P
<
0.01). Compared with model group, the level of SOD in serum of Longshengzhi capsules high-dose group was significantly increased (
P
<
0.05), the level of GSH-Px in serum of Longshengzhi capsules high-, medium- and low-dose groups was significantly increased (
P
<
0.05,
P
<
0.01), and the level of MDA was significantly decreased (
P
<
0.05). TNF-
α
, IL-6 and IL-1
β
levels were significantly decreased (
P
<
0.05,
P
<
0.01). HE staining showed that Longshengzhi capsules could improve pathological damage in hippocampus of VD rats. Western blot results showed that compared with sham operation group, the protein expressions of Bax, NF-
κ
B, MMP-9 and ICAM-1 in model group were significantly increased (
P
<
0.01), and the protein expressions of Bcl-2, Akt and p-Akt were significantly decreased (
P
<
0.05,
P
<
0.01). The protein expression of Bax, NF-
κ
B, MMP-9 and ICAM-1 in Longshengzhi capsules high-, medium- and low-dose groups was significantly decreased (
P
<
0.05,
P
<
0.01), and the protein expression of Bcl-2 was significantly increased (
P
<
0.05,
P
<
0.01). The protein expression of Akt in Longshengzhi capsules high- and medium-dose groups was significantly increased (
P
<
0.05). The expression of p-Akt protein in Longshengzhi capsules high-dose group was significantly increased (
P
<
0.01).
Conclusion
2
Longshengzhi capsules can improve the cognitive function of VD rats, and its mechanism may be related to the inhibition of oxidative stress, inflammatory response and apoptosis.
Conclusion
2
Longshengzhi capsules can improve the cognitive function of VD rats by inhibiting oxidative stress, inflammatory reaction, and neuronal apoptosis.
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