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江西中医药大学,南昌 330004
Received:21 June 2022,
Published Online:31 August 2022,
Published:05 February 2023
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张媛,朱金华,张米兰等.温胆汤对精神分裂症模型大鼠海马TrKB、CREB表达的影响[J].中国实验方剂学杂志,2023,29(03):26-33.
ZHANG Yuan,ZHU Jinhua,ZHANG Milan,et al.Effect of Wendantang on Expression of TrKB and CREB in Hippocampus of Rats with Schizophrenia[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(03):26-33.
张媛,朱金华,张米兰等.温胆汤对精神分裂症模型大鼠海马TrKB、CREB表达的影响[J].中国实验方剂学杂志,2023,29(03):26-33. DOI: 10.13422/j.cnki.syfjx.20221705.
ZHANG Yuan,ZHU Jinhua,ZHANG Milan,et al.Effect of Wendantang on Expression of TrKB and CREB in Hippocampus of Rats with Schizophrenia[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(03):26-33. DOI: 10.13422/j.cnki.syfjx.20221705.
目的
2
探讨温胆汤对精神分裂症(SCZ)模型大鼠海马组织酪氨酸蛋白激酶受体B(TrKB)、环磷酸腺苷反应元件结合蛋白(CREB)表达变化的影响。
方法
2
将54只大鼠随机分为正常组、模型组、温胆汤高、中、低剂量组和氯氮平组,每组9只。各组大鼠均以灌胃的方式给药21 d,温胆汤高、中、低剂量组的给药剂量分别为40、20、10 g·kg
-1
温胆汤药液,氯氮平组为0.02 g·kg
-1
氯氮平原液,正常组和模型组则灌胃同等容量的生理盐水。在末次给药2 h后,除正常组外,对其余5组大鼠予以腹腔注射0.6 mg·kg
-1
地卓西平马来酸盐(MK-801),建立SCZ模型。通过旷场实验观察大鼠的自发活动水平,苏木素-伊红(HE)染色观察大鼠海马CA1区病理形态变化,蛋白免疫印迹法(Western blot)检测海马组织TrKB、磷酸化(p)-TrKB、CREB和p-CREB的蛋白表达,免疫组化检测海马CA1区TrKB、CREB的蛋白表达,实时荧光定量聚合酶链式反应(Real-time PCR)检测海马组织TrKB、CREB mRNA表达水平。
结果
2
与正常组比较,模型组大鼠自发活动水平显著增加(
P
<
0.01),海马CA1区神经元细胞排列松散紊乱,部分神经元细胞变性,海马组织TrKB、p-TrKB、CREB、p-CREB蛋白、海马CA1区TrKB、CREB蛋白及海马组织TrKB、CREB mRNA表达均明显降低(
P
<
0.05,
P
<
0.01)。与模型组比较,温胆汤各组大鼠自发活动水平显著降低(
P
<
0.01),海马CA1区神经元细胞排列相对整齐、胞体形态较为规则,神经元变性等现象较少;温胆汤中、低剂量组海马组织TrKB蛋白表达明显升高(
P
<
0.05),温胆汤各剂量组海马组织p-TrKB、CREB、p-CREB蛋白表达明显升高(
P
<
0.05);温胆汤各剂量组海马CA1区TrKB蛋白表达明显升高(
P
<
0.05,
P
<
0.01),温胆汤中、低剂量组海马CA1区CREB蛋白表达显著升高(
P
<
0.01);温胆汤高、低剂量组海马组织TrKB mRNA表达明显升高(
P
<
0.05,
P
<
0.01),温胆汤中、低剂量组CREB mRNA表达明显升高(
P
<
0.05,
P
<
0.01)。
结论
2
温胆汤可以通过降低SCZ模型大鼠自发活动水平、改善海马神经元病理损伤、增加TrKB、p-TrKB、CREB、p-CREB的表达,从而预防SCZ及其认知障碍的发生、发展。
Objective
2
To study the effects of Wendantang on the expression of receptor tyrosine kinase receptors B (TrkB) and cyclic adenosine monophosphate response element binding protein (CREB) in the hippocampus of rats with schizophrenia (SCZ).
Method
2
Fifty-four rats were randomly divided into a normal group, a model group, high (40 g·kg
-1
), medium (20 g·kg
-1
), low-dose (10 g·kg
-1
) Wendantang groups, and a clozapine (0.02 g·kg
-1
) group, with 9 rats in each group. All groups of rats were given corresponding drugs by gavage for 21 d. The normal and model groups were given equal volume of normal saline. Except the normal group, the other 5 groups were given 0.6 mg·kg
-1
dizocilpine maleate (MK-801) at 2 hours after the last administration for intraperitoneal injection to induce the rat model of SCZ. The level of spontaneous activity of rats was observed by open field experiment. Histomorphological changes in the hippocampal CA1 area was observed by hematoxylin-eosin (HE) staining. The protein expression levels of TrKB, phosphorylated-TrKB (p-TrKB), CREB, and phosphorylated-CREB (p-CREB) were detected by Western blot. The protein expression levels of TrKB and CREB in the hippocampal CA1 area were observed by immunohistochemistry. The mRNA expression levels of TrKB and CREB in the hippocampus were detected by real-time quantitative polymerase chain reaction (Real-time PCR).
Result
2
As compared with the normal group, the level of spontaneous activity in the model group was significantly increased (
P
<
0.01). The arrangement of neuronal cells in the hippocampus CA1 area was loose and disorganized, and some neurons were denatured in the model group. The protein expression levels of TrKB, p-TrKB, CREB, and p-CREB in the hippocampus, the protein expression levels of TrKB and CREB in the hippocampal CA1 area, and the mRNA expression of TrKB and CREB in the hippocampus were significantly decreased (
P
<
0.05,
P
<
0.01). As compared with the model group, the level of spontaneous activity in all Wendantang groups were significantly decreased (
P
<
0.01). The neuronal cells in the hippocampal CA1 area of rats in all Wendantang groups were relatively neatly and closely arranged, the morphology of cell body was more regular, and neurons degeneration was rarely observed. The protein expression level of TrKB in the hippocampus was significantly higher in the medium and low-dose Wendantang groups (
P
<
0.05). The protein expression levels of p-TrKB, CREB, and p-CREB in the hippocampus were significantly higher in all Wendantang groups (
P
<
0.05). The protein expression of TrKB in the hippocampal CA1 area was significantly increased in all Wendantang groups (
P
<
0.05,
P
<
0.01). The protein expression of CREB in the hippocampal CA1 area was significantly increased in the medium and low-dose Wendantang groups (
P
<
0.01). The mRNA expression of TrKB in the hippocampus was significantly increased in the high and low-dose Wendantang groups (
P
<
0.05,
P
<
0.01). The mRNA expression of CREB was significantly increased in the medium and low-dose Wendantang groups (
P
<
0.05,
P
<
0.01).
Conclusion
2
Wendantang can prevent the occurrence and development of SCZ and cognitive impairment by decreasing the level of spontaneous activity, improving the pathological damage of hippocampal neurons, and increasing the expression levels of TrKB, p-TrKB, CREB, and p-CREB.
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