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.
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.
Amelioration of Cognitive Dysfunction in Diabetic Rats by Jianpi Qinghua Prescription
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.
关键词
健脾清化方糖尿病认知功能障碍β淀粉样蛋白tau蛋白磷酸化
Keywords
Jianpi Qinghua prescriptiondiabetes mellituscognitive dysfunctionamyloid β-proteintau protein phosphorylation
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