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Effect of Modified Chaihu Shugansan on CaMKⅡ/CREB Signaling Pathway in Rats with Myocardial Ischemia and Depression

  • role： First author第一作者
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

    Shanxi University of Chinese Medicine， Jinzhong 030619， China

  • Email：22761315@qq.com
  • Introduction：万芬，硕士，从事方剂配伍规律及方证研究，E-mail：22761315@qq.com
WAN Fen13,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

    Guangxi Key Laboratory of Chinese Medicine Foundation Research， Guangxi University of Chinese Medicine， Nanning 530200， China

LI Xiaohong12,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

CHEN Ying1,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

PAN Yangyu1,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

LUO Yanna1,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

LU Fangge1,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

ZHENG Chuncheng1,  
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

    Guangxi Key Laboratory of Chinese Medicine Foundation Research， Guangxi University of Chinese Medicine， Nanning 530200， China

KONG Pengyun12,  
  • role： Corresponding author通信作者
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

    Guangxi Key Laboratory of Chinese Medicine Foundation Research， Guangxi University of Chinese Medicine， Nanning 530200， China

  • Email：717791061@qq.com
  • Introduction：王呈祥，博士，讲师，从事方剂配伍规律及心血管疾病的中医药防治研究，E-mail：717791061@qq.com； *
WANG Chengxiang12*,  
  • role： Corresponding author通信作者
  • Affiliation：

    Guangxi University of Chinese Medicine， Nanning 530200， China

    Guangxi Key Laboratory of Chinese Medicine Foundation Research， Guangxi University of Chinese Medicine， Nanning 530200， China

  • Email：ylq6606@163.com
  • Introduction：杨力强，博士，教授，博士生导师，从事方剂配伍规律及心血管疾病的中医药防治研究，E-mail：ylq6606@163.com
YANG Liqiang12*

Resümee

ObjectiveTo observe the effects of modified Chaihu Shugansan on the calmodulin-dependent protein kinase Ⅱ（CaMKⅡ）/cAMP-response element binding protein （CREB） signaling pathway in the hippocampus and heart tissue of a rat model with myocardial ischemia and depression and explore the mechanism by which this formula prevents and treats coronary heart disease combined with depression.MethodsThe model of myocardial ischemia combined with depression was established by high-fat diet， intraperitoneal injection of isoproterenol （ISO）， and chronic unpredictable mild stress （CUMS）. A total of 108 SD male rats were randomly divided into normal group， model group， high （23.4 g·kg-1）， medium （11.7 g·kg-1）， and low （5.85 g·kg-1） dose groups of modified Chaihu Shugansan， CaMKⅡ inhibitor （KN93） group， and KN93 + high， medium， and low dose groups of modified Chaihu Shugansan， with 12 rats in each group. From the first day of modeling to the end of modeling， drugs were administered once a day. In the seventh and eighth weeks， the KN93 group and the KN93 + high， medium， and low dose groups of modified Chaihu Shugansan were intraperitoneally injected with KN93 three times weekly. At the end of the eighth week， behavioral tests including sucrose preference， open field， and elevated plus maze were conducted. Electrocardiogram （ECG） lead Ⅱ changes were observed in each group of rats， and hematoxylin-eosin （HE） staining was performed to observe changes in heart tissue. Serum levels of triglycerides （TG）， total cholesterol （TC）， high-density lipoprotein （HDL）， low-density lipoprotein （LDL）， and lactate dehydrogenase （LDH） were measured by using an enzyme-labeled instrument. Creatine kinase （CK） and creatine kinase-MB （CK-MB） were detected by ultraviolet spectrophotometry， while serum monocyte chemoattractant protein-1 （MCP-1） was measured by enzyme-linked immunosorbent assay （ELISA）. Real-time fluorescence quantitative polymerase chain reaction （Real-time PCR） was used to detect mRNA expression of CaMKⅡ and CREB in hippocampal and heart tissue， and Western blot was performed to assess protein expression of CaMKⅡ， phosphorylated （p）-CaMKⅡ， CREB， and p-CREB.ResultsCompared to the normal group， the model group showed significant reductions in sucrose preference rate， total activity distance in the open field， number of entries into the center area of the open field， and percentage of entries into the open arms of the elevated plus maze （P<0.01）. The ECG showed ST-segment elevation， and HE staining showed serious degeneration of myocardial fibers， disordered arrangement， and infiltration of a large number of inflammatory cells. In addition， serum TC and LDL levels increased （P<0.01）， and HDL level decreased （P<0.01）. CK， CK-MB， LDH， and MCP-1 levels significantly increased （P<0.05， P<0.01）. The mRNA expression of CaMKⅡ and CREB and the protein expression of p-CaMKⅡ and p-CREB decreased in the hippocampal tissue （P<0.05， P<0.01）， but those increased in the heart tissue （P<0.01）. Compared to the model group， the high， medium， and low dose groups of modified Chaihu Shugansan showed improvements in these abnormalities. The KN93 group had reduced sucrose preference， total activity distance in the open field， number of entries into the center area of the open field， and percentage of entries into the open arms of the elevated plus maze （P<0.01）， as well as decreased serum CK， CK-MB， LDH， and MCP-1 levels （P<0.05， P<0.01）. KN93 also reduced ST-segment elevation， alleviated the degeneration degree of myocardial fibrosis， and lowered inflammatory cell infiltration. The mRNA expression of CaMKⅡ and CREB and the protein expression of p-CaMKⅡ and p-CREB in both the hippocampal and heart tissue were reduced （P<0.05， P<0.01）. The KN93 + high， medium， and low dose groups of modified Chaihu Shugansan showed further improvements in these abnormalities compared to the KN93 group.ConclusionThe modified Chaihu Shugansan exerts antidepressant and myocardial protective effects in rats with myocardial ischemia and depression， possibly related to bidirectional regulation of the CaMKⅡ/CREB signaling pathway， with the high-dose modified Chaihu Shugansan showing the best effects.

Schlüsselwort

modified Chaihu Shugansan;myocardial ischemia combined with depression;calmodulin-dependent protein kinaseⅡ （CaMKⅡ）/cAMP-response element binding protein （CREB） signaling pathway

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