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1.陕西中医药大学 药学院,陕西 咸阳 712046
2.陕西省中医药管理局 中药药效机制与物质基础重点研究室,陕西 咸阳 712046
Received:25 February 2022,
Published Online:20 April 2022,
Published:20 August 2022
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张瑞华,石勇,曹珊珊等.基于Ghrelin水平调控探讨玉液汤对2型糖尿病大鼠认知障碍的影响[J].中国实验方剂学杂志,2022,28(16):35-41.
ZHANG Ruihua,SHI Yong,CAO Shanshan,et al.Impact of Yuyetang on Cognitive Impairment of Rats with Type 2 Diabetes Mellitus Based on Regulation of Ghrelin Level[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(16):35-41.
张瑞华,石勇,曹珊珊等.基于Ghrelin水平调控探讨玉液汤对2型糖尿病大鼠认知障碍的影响[J].中国实验方剂学杂志,2022,28(16):35-41. DOI: 10.13422/j.cnki.syfjx.20221204.
ZHANG Ruihua,SHI Yong,CAO Shanshan,et al.Impact of Yuyetang on Cognitive Impairment of Rats with Type 2 Diabetes Mellitus Based on Regulation of Ghrelin Level[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(16):35-41. DOI: 10.13422/j.cnki.syfjx.20221204.
目的
2
观察玉液汤对2型糖尿病认知障碍(DCI)大鼠胃饥饿素(Ghrelin)表达水平的调控,探讨其防治DCI的作用途径。
方法
2
以高脂高糖饲料结合链脲佐菌素(STZ)腹腔注射建立2型糖尿病大鼠模型,除正常组外,造模成功后按照血糖均匀分模型组、二甲双胍组(200 mg·kg
-1
)、玉液汤低、中、高剂量组(4.575、9.15、18.3 g·kg
-1
),每组10只。连续灌胃给药30 d,观察并记录各组大鼠体质量及血糖。给药结束即采用Morris水迷宫法测试大鼠学习记忆能力,测试结束后取大鼠全脑进行苏木素-伊红(HE)染色观察海马CA1区病理变化,同时以免疫组化法检测胃组织和海马CA1区Ghrelin的表达。
结果
2
与正常组比较,模型组大鼠血糖显著上升(
P
<
0.01),体质量显著下降(
P
<
0.01),水迷宫逃避潜伏期明显增加(
P
<
0.05,
P
<
0.01),目标区域停留时间及运动路程、穿越平台次数显著下降(
P
<
0.01),海马CA1区细胞形态结构异常,排列紊乱,数量减少,大鼠血清、海马CA1区及胃组织Ghrelin蛋白表达明显降低(
P
<
0.05,
P
<
0.01)。与模型组比较,玉液汤中、高剂量组大鼠体质量均增加,各剂量组血糖显著下降(
P
<
0.01),各组大鼠逃避潜伏期均明显缩短(
P
<
0.05),目标区域停留时间、运动路程及穿越平台次数均明显增加(
P
<
0.05,
P
<
0.01),海马CA1区细胞结构形态均改善,正常细胞数量增加,血清、胃组织及海马CA1区Ghrelin水平明显提高(
P
<
0.05,
P
<
0.01)。
结论
2
玉液汤可有效改善DCI大鼠的认知能力,其机制可能与其调节血清、海马CA1区及胃组织Ghrelin有关。
Objective
2
To observe the regulatory effect of Yuyetang on Ghrelin level in rats with type 2 diabetes mellitus (T2DM)-induced cognitive impairment (DCI) and explore the pathway in the prevention and treatment of DCI.
Method
2
The T2DM model was induced in rats by intraperitoneal injection of streptozotocin (STZ) combined with the high-fat and high-sugar diet (STZ). The model rats were divided into model group, metformin group (200 mg·kg
-1
), and low-,medium-, and high-dose Yuyetang groups(4.575,9.15, 18.3 g·kg
-1
)according to the blood glucose, with 10 rats in each group. A normal group was also set up. The rats were administered with corresponding drugs by gavage for 30 days, and the body weight and blood glucose of the rats in each group were observed and recorded. After drug intervention, the learning and memory abilities of rats were tested by the Morris water maze. After the test, the whole brains of rats were sampled for hematoxylin-eosin (HE) staining to observe the pathological changes in the hippocampal CA1 region, and the expression of Ghrelin in gastric tissues and hippocampal CA1 region was detected by immunohistochemistry.
Result
2
Compared with the normal group , the model group showed increased blood glucose(
P
<
0.01),reduced body weight(
P
<
0.01),prolonged escape latency(
P
<
0.05,
P
<
0.01), shortened retention time and movement distance in the target area,decreased number of platform crossings(
P
<
0.01), abnormal morphology and structure of cells with disordered arrangement and reduced number in the hippocampal CA1 region, and decreased expression of Ghrelin in the serum,hippocampal CA1 region, and gastric tissues(
P
<
0.05,
P
<
0.01). Compared with the model group, the medium- and high-dose Yuyetang groups showed increased body weight, while all Yuyetang groups showed reduced blood glucose(
P
<
0.01), shortened escape latency (
P
<
0.05), prolonged retention time and movement distance in the target area,increased platform crossings (
P
<
0.05,
P
<
0.01), improved morphology and structure of cells, increased number of normal cell in the hippocampal CA1 region, and elevated Ghrelin levels in the serum, gastric tissues, and hippocampal CA1 region(
P
<
0.05,
P
<
0.01).
Conclusion
2
Yuyetang can effectively improve the cognitive ability of DCI rats, and its mechanism may be related to the regulation of Ghrelin levels in the serum, hippocampal CA1 region, and gastric tissues.
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