OBJECTIVE To explore the antipost-traumatic-stress-disorder(PTSD) effects and its probable mechanism of YQA14,a dopamine D3 receptor antagonist.METHODS Two PTSD animal models,the rat single prolonged stress(SPS) model...OBJECTIVE To explore the antipost-traumatic-stress-disorder(PTSD) effects and its probable mechanism of YQA14,a dopamine D3 receptor antagonist.METHODS Two PTSD animal models,the rat single prolonged stress(SPS) model and the mouse pre-shock model,were used in this experiment.In the SPS model,adult male Sprague-Dawley(SD) rats were randomly divided into control group,model group,positive group and YQA14 groups with different dosages.In the mouse pre-chock model,dopamine D3 receptor knockout(KO) and wild type(WT) mice were randomly divided into control group,model group,positive group and YQA14 group.After the establishment of animal models,the saline,sertraline(ig) and YQA14(ip)were administered to the animals in the control,model,positive control and test groups respectively.The open field test(OFT) was used to evaluate the locomotor activity while the contextual freezing(CF) measurement and elevated plus maze(EPM) test were used to evaluate the PTSD-like behaviors.RESULTS In the rat SPS model,neither SPS nor drug treatment affected the locomotor activity in rats.However,SPS rats showed significant PTSD-like behaviors with enhanced freezing time in CF(P<0.01) and decreased percentage of entries into open arms and time spent in open arms in EPM(P<0.05,P<0.01).Moreover,compared with the model group,the repeated administration of YQA14(3.125,6.25 and 12.5 mg·kg-1)significantly reduced the freezing time(P<0.01)and increased the percentages of entries into open arms and time spent in open arms(P<0.05).In the mouse pre-shock model,when both model groups showed significant higher freezing time compared with the respective control groups(P<0.05,P<0.01),YQA14 selectively alleviated the freezing time on WT mice(P<0.05) while had no effect on KO mice.In the EPM tests,the WT mice model group showed a significant reduction in the percentage of entries into open arms and time spent in open arms(P<0.05) while D3 R KO mice model group didn′ t show any reduction,compared with respective control groups.Furthermore,daily administration of YQA14 at 12.5 mg·kg-1 both significantly reduced the percentages of entries into and time spent in open arms(P<0.05) but not D3 R KO mice.None of the locomotor activity were significantly affected.CONCLUSION YQA14 could significantly alleviate the PTSD-like behaviors in rodents and the effects were mediated by the blockade of brain D3 receptors.展开更多
目的研究创伤后应激障碍(PTSD)状态下,超极化激活环核苷酸门控阳离子通道2(HCN2)与谷氨酸转运体-1(GLT-1)在脊髓水平协同调控内脏高敏感性-中枢敏化的作用及机制。方法成年雌性SD大鼠随机分为3组,即正常对照组(n=14)、PTSD内脏高敏感模...目的研究创伤后应激障碍(PTSD)状态下,超极化激活环核苷酸门控阳离子通道2(HCN2)与谷氨酸转运体-1(GLT-1)在脊髓水平协同调控内脏高敏感性-中枢敏化的作用及机制。方法成年雌性SD大鼠随机分为3组,即正常对照组(n=14)、PTSD内脏高敏感模型组(n=15)、PTSD+头孢曲松(CTX)组[给予CTX预处理,n=15)。采用连续单一应激(SPS)联合足底电击刺激法建立PTSD内脏高敏感大鼠模型。建模7d后,采用结直肠扩张(CRD)-内脏运动反射(VMR)评估各组内脏敏感性的改变;采用CTX选择性诱发编码GLT-1的基因转录,并采用激光共聚焦及免疫荧光技术研究脊髓HCN2的表达及CTX对其的影响。结果与正常对照组比较,PTSD组脊髓HCN2表达明显上调(78.05±6.49 vs121.12±4.85,P<0.001);与PTSD组比较,PTSD+CTX组HCN2表达显著降低(121.12±4.85 vs 98.24±5.86,P=0.012);PTSD+CTX组HCN2表达比正常对照组明显升高(98.24±5.86 vs 78.05±6.49,P=0.024)。在20mmHg压力下行CRD时,PTSD组的AUCVMR明显高于PTSD+CTX组(0.2913±0.0229 vs 0.2175±0.0090,P=0.005);在40mmHg压力下行CRD时,PTSD组的AUCVMR明显高于正常对照组(0.6200±0.0278 vs 0.3786±0.0155,P<0.001),亦高于PTSD+CTX组(0.6200±0.0278 vs 0.5038±0.0336,P=0.006);在60mmHg压力下行CRD时,与正常对照组比较,PTSD组AUCVMR明显增高(0.7663±0.0262 vs 0.5271±0.0212,P<0.001),同时亦明显高于PTSD+CTX组(0.7663±0.0262 vs 0.6400±0.0245,P=0.001)。结论在PTSD内脏高敏感状态下,CTX可通过直接上调GLT-1表达并间接下调HCN2的表达协同发挥抗内脏伤害性刺激的作用,HCN2-GLT-1信号通路在脊髓水平协同参与了内脏高敏感性-中枢敏化调控作用,可能成为防止或抑制PTSD状态下内脏高敏感性-痛觉敏化新靶点之一。展开更多
基金National Key Research and DevelopmentProgram of China (2016YFC0800907)MedicalInnovation Program (16CXZ033)+2 种基金National KeyBasic Research Program (2015CB553504)National Natural Science Foundation of China(8157340581373385).
文摘OBJECTIVE To explore the antipost-traumatic-stress-disorder(PTSD) effects and its probable mechanism of YQA14,a dopamine D3 receptor antagonist.METHODS Two PTSD animal models,the rat single prolonged stress(SPS) model and the mouse pre-shock model,were used in this experiment.In the SPS model,adult male Sprague-Dawley(SD) rats were randomly divided into control group,model group,positive group and YQA14 groups with different dosages.In the mouse pre-chock model,dopamine D3 receptor knockout(KO) and wild type(WT) mice were randomly divided into control group,model group,positive group and YQA14 group.After the establishment of animal models,the saline,sertraline(ig) and YQA14(ip)were administered to the animals in the control,model,positive control and test groups respectively.The open field test(OFT) was used to evaluate the locomotor activity while the contextual freezing(CF) measurement and elevated plus maze(EPM) test were used to evaluate the PTSD-like behaviors.RESULTS In the rat SPS model,neither SPS nor drug treatment affected the locomotor activity in rats.However,SPS rats showed significant PTSD-like behaviors with enhanced freezing time in CF(P<0.01) and decreased percentage of entries into open arms and time spent in open arms in EPM(P<0.05,P<0.01).Moreover,compared with the model group,the repeated administration of YQA14(3.125,6.25 and 12.5 mg·kg-1)significantly reduced the freezing time(P<0.01)and increased the percentages of entries into open arms and time spent in open arms(P<0.05).In the mouse pre-shock model,when both model groups showed significant higher freezing time compared with the respective control groups(P<0.05,P<0.01),YQA14 selectively alleviated the freezing time on WT mice(P<0.05) while had no effect on KO mice.In the EPM tests,the WT mice model group showed a significant reduction in the percentage of entries into open arms and time spent in open arms(P<0.05) while D3 R KO mice model group didn′ t show any reduction,compared with respective control groups.Furthermore,daily administration of YQA14 at 12.5 mg·kg-1 both significantly reduced the percentages of entries into and time spent in open arms(P<0.05) but not D3 R KO mice.None of the locomotor activity were significantly affected.CONCLUSION YQA14 could significantly alleviate the PTSD-like behaviors in rodents and the effects were mediated by the blockade of brain D3 receptors.
文摘目的研究创伤后应激障碍(PTSD)状态下,超极化激活环核苷酸门控阳离子通道2(HCN2)与谷氨酸转运体-1(GLT-1)在脊髓水平协同调控内脏高敏感性-中枢敏化的作用及机制。方法成年雌性SD大鼠随机分为3组,即正常对照组(n=14)、PTSD内脏高敏感模型组(n=15)、PTSD+头孢曲松(CTX)组[给予CTX预处理,n=15)。采用连续单一应激(SPS)联合足底电击刺激法建立PTSD内脏高敏感大鼠模型。建模7d后,采用结直肠扩张(CRD)-内脏运动反射(VMR)评估各组内脏敏感性的改变;采用CTX选择性诱发编码GLT-1的基因转录,并采用激光共聚焦及免疫荧光技术研究脊髓HCN2的表达及CTX对其的影响。结果与正常对照组比较,PTSD组脊髓HCN2表达明显上调(78.05±6.49 vs121.12±4.85,P<0.001);与PTSD组比较,PTSD+CTX组HCN2表达显著降低(121.12±4.85 vs 98.24±5.86,P=0.012);PTSD+CTX组HCN2表达比正常对照组明显升高(98.24±5.86 vs 78.05±6.49,P=0.024)。在20mmHg压力下行CRD时,PTSD组的AUCVMR明显高于PTSD+CTX组(0.2913±0.0229 vs 0.2175±0.0090,P=0.005);在40mmHg压力下行CRD时,PTSD组的AUCVMR明显高于正常对照组(0.6200±0.0278 vs 0.3786±0.0155,P<0.001),亦高于PTSD+CTX组(0.6200±0.0278 vs 0.5038±0.0336,P=0.006);在60mmHg压力下行CRD时,与正常对照组比较,PTSD组AUCVMR明显增高(0.7663±0.0262 vs 0.5271±0.0212,P<0.001),同时亦明显高于PTSD+CTX组(0.7663±0.0262 vs 0.6400±0.0245,P=0.001)。结论在PTSD内脏高敏感状态下,CTX可通过直接上调GLT-1表达并间接下调HCN2的表达协同发挥抗内脏伤害性刺激的作用,HCN2-GLT-1信号通路在脊髓水平协同参与了内脏高敏感性-中枢敏化调控作用,可能成为防止或抑制PTSD状态下内脏高敏感性-痛觉敏化新靶点之一。
