疲劳与束缚应激对大鼠主动脉肉碱棕榈酰转移酶-Ⅰ及5-羟色氨受体的影响  被引量:2

Effects of fatigue and restraint stress on the expression of carnitine palmitoyltransferase- Ⅰ and 5-hydroxytryptamine receptors in aorta of rats

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作  者:魏聪[1] 韩建科 王宏涛 贾振华 常丽萍 吴以岭[4] 

机构地区:[1]河北医科大学中西医结合教研室,石家庄050035 [2]河北省中西医结合医药研究院 [3]国家中医药管理局重点研究室,心脑血管络病 [4]河北医科大学中西医结合教研室河北省中西医结合医药研究院,石家庄050035

出  处:《中华医学杂志》2011年第13期915-919,共5页National Medical Journal of China

基  金:国家重点基础研究发展计划(973计划)项目(2005CB523301);国家"十一五"重大新药创制项目(2009ZX09313-003)

摘  要:目的 观察疲劳与束缚应激对大鼠主动脉血管内皮功能与肉碱棕榈酰转移酶-Ⅰ(CPT-Ⅰ)、过氧化物酶体增殖物激活受体δ(PPARδ)、5-羟色氨1D(5-HT1D)、5-羟色氨2A(5-HT2A)受体表达的影响.方法 健康雄性Wisar大鼠45只,随机分为对照组、疲劳组和束缚组.观察大鼠一般状况、主动脉内皮细胞形态和结构,检测血中内皮素(ET-1)和一氧化氮(NO)水平,采用实时PCR和Western印迹检测主动脉CPT-Ⅰ、PPARδ和5-HT1D、5-HT2A受体基因和蛋白表达.结果 与对照组比较,疲劳和束缚应激均可导致大鼠主动脉内皮结构损伤,血清ET-1水平升高[(124±18)ng/L比(161±18)ng/L、(154±17)ng/L](P<0.01,P<0.05),血浆NO水平降低[(63±16)μmol/L比(39±8)μmol/L、(41±7)μmol/L](P<0.05);疲劳应激大鼠主动脉CPT-Ⅰ和PPAR-δmRNA表达下调,分别为[(1.23±0.21)比(0.42±0.05)]、[(1.09±0.10)比(0.25±0.07)](均P<0.01),同时CPT-Ⅰ和PPAR-δm蛋白表达亦下调[(1.32±0.07)比(0.83±0.04)]、[(1.41±0.05)比(0.75±0.06)](均P<0.01);疲劳、束缚应激均可导致主动脉5-HT1D受体mRNA和蛋白表达下调[(1.10±0.15)比(0.46±0.13)、(0.45±0.02)],[(1.19±0.05)比(0.71±0.06)、(0.70±0.05)](P<0.01);同时5-HT2A受体mRNA和蛋白表达上调[(0.99±0.08)比(6.73±0.46)、(7.01±1.56)],[(0.64±0.03)比(0.79±0.05)、(0.82±0.03)](均P<0.01).结论 过度疲劳与情绪抑郁均可损伤血管内皮结构与功能,其中肉碱代谢异常为主的能量变化和5-HT受体调节异常在其中发挥重要作用.Objective To investigate the effect of fatigue and restraint stress on the expressions of CPT (carnitine palmitoyltransferase )-Ⅰ , PPAR (peroxisome proliferator-activated receptor) δ, 5-HT (hydroxytryptamine) 1D and 5-HT2A receptors in aorta of rats. Methods A total of 45 healthy male Wistar rats were randomly divided into control group, excessive fatigue group and restraint stress group (n =15 each). The general condition, morphological changes of aortic endothelium cell and the blood levels of ET-1 (endothelin) and NO (nitric oxide ) were observed. The real-time reverse transcription PCR (polymerase chain reaction) and Western blot were used to detect the gene and protein expressions of CPT-Ⅰ , PPAR δ, 5-HT1D and 5-HT2A receptors in aorta. Results Compared with control group, the structural damages of endothelial cell were induced by excessive fatigue and restraint stress. The plasma levels of ET-1 increased [( 124 ± 18)ng/L vs( 161 ± 18 ) ng/L, ( 154 ± 17 ) ng/L] (P < 0.01, P < 0.05 )while the serum levels of NO decreased [(63 ± 16) μmol/L vs(39 ±8) μmol/L, (41 ±7) μmol/L] (P <0. 05); the mRNA expressions of CPT- Ⅰ and PPARδ decreased in excessive fatigue rats, [( 1.23 ± 0.21 )vs (0.42 ± 0.05 )], [( 1.09 ± 0.10) vs (0.25 ± 0.07 )] ( P < 0.01 ); the protein expressions of CPT- Ⅰ and PPARδ decreased in excessive fatigue rats, [( 1.32 ± 0.07 ) vs (0. 83 ± 0.04 )], [( 1.41 ± 0.05 ) vs.(0.75 ± 0. 06)]; the mRNA and protein expressions of 5-HT1 D receptor decreased in excessive fatigue rats and restraint stress rats, [(1. 10 ±0.15)vs (0.46 ±0.13) ,(0.45 ±0.02)], [( 1. 19 ±0.05)vs (0.71±0. 06), (0.70 ±0.05 )] (P < 0.01 ); the mRNA and protein expressions of 5-HT2A receptor increased in excessive fatigue rats and restraint stress rats, [(0.99 ± 0. 08 ) vs (6.73 ± 0.46 ), ( 7.01 ± 1.56 )],[(0.64±0. 03)vs (0. 79 ±0. 05), (0. 8

关 键 词:疲劳 抑郁 肉碱棕榈酰转移酶-Ⅰ 5-羟色氨受体 

分 类 号:R363[医药卫生—病理学]

 

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