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1.上海中医药大学 附属曙光医院,糖尿病研究所,上海 201203
2.河北省中医院,石家庄 130100
3.山东中医药大学 医学院,济南 250355
Received:25 August 2022,
Published Online:29 December 2022,
Published:20 April 2023
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郭秋月,耿艳娜,韩煦等.健脾清化方对糖尿病大鼠认知功能障碍的改善作用[J].中国实验方剂学杂志,2023,29(08):195-202.
GUO Qiuyue,GENG Yanna,HAN Xu,et al.Amelioration of Cognitive Dysfunction in Diabetic Rats by Jianpi Qinghua Prescription[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(08):195-202.
郭秋月,耿艳娜,韩煦等.健脾清化方对糖尿病大鼠认知功能障碍的改善作用[J].中国实验方剂学杂志,2023,29(08):195-202. DOI: 10.13422/j.cnki.syfjx.20230138.
GUO Qiuyue,GENG Yanna,HAN Xu,et al.Amelioration of Cognitive Dysfunction in Diabetic Rats by Jianpi Qinghua Prescription[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(08):195-202. DOI: 10.13422/j.cnki.syfjx.20230138.
目的
2
利用2型糖尿病(T2DM)模型大鼠探讨健脾清化方对糖尿病(DM)认知功能障碍的改善作用。
方法
2
从50只SPF级健康雄性Wistar大鼠中随机挑选10只作为空白组并给予常规饲料喂养,其余大鼠给予6周高糖高脂饮食,链脲佐菌素(STZ)诱导建立DM模型。将成模大鼠随机分为模型组、西格列汀组(1.2 g·L
-1
)、吡格列酮组(0.8 g·L
-1
)和健脾清化方组(1.3 g·mL
-1
),每组10只。连续灌胃6周后,记录各组大鼠体质量、血糖等相关指标的变化;酶联免疫吸附测定法(ELISA)检测外周血和脑内肿瘤坏死因子-
α
(TNF-
α
)、白细胞介素-1
β
(IL-1
β
)和白细胞介素-6(IL-6)的水平;Morris水迷宫实验评估大鼠认知功能;苏木素-伊红(HE)染色观察海马CA区病理学形态;免疫组化检测
β
淀粉样蛋白40(A
β
40
)水平;蛋白免疫印迹法(Western blot)检测大鼠海马神经元t-tau、磷酸化(p)-tau蛋白表达。
结果
2
与空白组比较,模型组大鼠体质量显著下降(
P
<
0.05),血糖水平显著升高(
P
<
0.01),TNF-
α
、IL-1
β
含量均升高(
P
<
0.05),学习和空间记忆能力显著下降(
P
<
0.01),海马细胞排列疏松紊乱,细胞间隙明显增大,细胞数量明显减少,A
β
40
表达显著升高,海马中t-tau和p-tau蛋白表达显著增加(
P
<
0.01);与模型组比较,健脾清化方组大鼠血糖水平显著降低(
P
<
0.01),外周血和脑脊液TNF-
α
和IL-1
β
水平降低(
P
<
0.05),IL-6呈下降趋势,但差异无统计学意义,学习和空间记忆能力显著提高(
P
<
0.01),海马CA1区神经元细胞排列紧密,数量明显增加,A
β
40
表达减少,p-tau蛋白表达明显降低(
P
<
0.05)。
结论
2
健脾清化方可能通过降低DM大鼠炎症水平,减少A
β
40
沉积导致的神经毒性,抑制tau蛋白过度磷酸化,防治DM认知功能障碍。
Objective
2
To explore the amelioration of cognitive dysfunction in diabetes mellitus (DM) by Jianpi Qinghua prescription (JPQH) based on type 2 diabetes (T2DM) model rats.
Method
2
Fifty healthy male Wistar rats of SPF grade were randomly divided into control group (
n
=10) and experimental group (
n
=40). The rats in the control group were fed conventionally, while those in the experimental group were fed on a high-sugar, high-fat diet for six weeks and administered with streptozotocin (STZ) for the induction of the DM model. The model rats were randomly divided into model group, sitagliptin group (1.2 g·L
-1
), pioglitazone group (0.8 g·L
-1
), and JPQH group (1.3 g·mL
-1
), with 10 rats in each group. After six weeks of drug intervention, the changes in body weight, blood glucose, and other related indexes of each group were recorded. Enzyme-linked immunosorbent assay (ELISA) was performed to detect the levels of tumor necrosis factor-
α
(TNF-
α
), interleukin-1
β
(IL-1
β
), and interleukin-6 (IL-6) in the peripheral blood and brain. The Morris water maze test was used to evaluate the cognitive function in rats. Hematoxylin-eosin (HE) staining was used to observe the pathological morphology of the hippocampal CA region. The amyloid
β
-protein 40 (A
β
40
) level was detected by immunohistochemistry. The protein expression of t-tau and p-tau in hippocampal neurons of rats was detected by Western blot.
Result
2
Compared with blank group, the body weight of model group was significantly decreased (
P
<
0.05), blood glucose level was significantly increased (
P
<
0.01), inflammatory cytokines TNF-
α
and IL-1
β
were increased (
P
<
0.05), learning and spatial ability were significantly decreased (
P
<
0.01), the arrangement of hippocampal cells was loose and disordered, and the intercellular space was significantly increased. The number of cells decreased significantly, and the expression of A
β
40
increased significantly. and increased t-tau and p-tau protein content in the hippocampus (
P<
0.01). Compared with model group, the JPQH group showed reduced blood glucose (
P
<
0.01), decreased TNF-
α
and IL-1
β
levels in the peripheral blood and cerebrospinal fluid (
P
<
0.05), a downward trend of IL-6 without a statistical difference, improved learning and spatial memory ability (
P
<
0.01), densely arranged cells in the hippocampal CA1 area, increased cell number, reduced A
β
40
expression, and decreased p-tau protein expression (
P
<
0.05).
Conclusion
2
JPQH can prevent cognitive dysfunction in DM by reducing inflammatory factor levels, decreasing neurotoxicity caused by A
β
40
deposition, and inhibiting hyperphosphorylation of tau protein in DM rats.
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