目的:探讨小鼠疼痛模型的昼夜节律和注射用蜂毒(Bee venom for injection,BVI)镇痛作用的昼夜差异及其相关机制。方法:采用热板法、辐射热甩尾法建立小鼠疼痛模型,在6个授时(Zeitgeber time,ZT)时间点(ZT2、ZT6、ZT10、ZT14、ZT18、ZT22...目的:探讨小鼠疼痛模型的昼夜节律和注射用蜂毒(Bee venom for injection,BVI)镇痛作用的昼夜差异及其相关机制。方法:采用热板法、辐射热甩尾法建立小鼠疼痛模型,在6个授时(Zeitgeber time,ZT)时间点(ZT2、ZT6、ZT10、ZT14、ZT18、ZT22)测量痛阈并分析其昼夜节律。将合格昆明小鼠随机分为注射用蜂毒大剂量(Bee venom for injection-High dose,BVI-H)、注射用蜂毒中剂量(Bee venom for injection-Medium dose,BVI-M)、注射用蜂毒低剂量(Bee venom for injection-low dose,BVI-L)、吗啡(Morphine,MOR)和模型(Model,MOD)组;每组再根据小鼠痛阈的昼夜节律分为两个亚组,分别在痛阈的峰值和谷值2个时间点给药。观察各组对热板法、辐射热甩尾法和扭体法疼痛模型小鼠行为学影响的动态变化;ELISA法检测血清P物质(Substances P,SP)、β-内啡肽(Beta-endorphin,β-EP)和IL-1β(interleukin-1β,IL-1β)水平。结果:小鼠疼痛模型的痛阈显示出峰值在明中期(ZT6)、谷值在暗后期(ZT22)的昼夜节律。BVI三个剂量组和MOR组均显示出明显的镇痛作用,并且BVI在热板法和扭体法模型的镇痛作用具有剂量依赖性。在热板法和辐射热法疼痛模型中,BVI于ZT22给药比ZT6给药显示出更强的镇痛作用。蜂毒对疼痛模型小鼠血清β-EP水平未显示上调作用;但可明显降低血清SP含量,且具有ZT22给药低于ZT6给药的昼夜变化(P<0.05);对扭体法和辐射热法(仅ZT22给药组)疼痛模型小鼠血清IL-1β水平显著下调,而在热板法则显示IL-1β水平明显增高。结论:小鼠的痛阈存在峰值在明中后期、谷值在暗后期的昼夜节律;BVI对小鼠多种疼痛模型均具有镇痛作用,且存在昼夜差异;BVI的镇痛作用及其昼夜变化可能与调节内源性疼痛介质有关。展开更多
Two rare earth complexes of Ts-β-AlaH with the formula of [Ln2(H2O)4(Ts-β-AlaH)6]n·4nH2O (where Ln = Nd(1), Gd(2); Ts-β-AlaH = N-p-tolylsulfonyl-β-Alanine) have been synthesized and characterized by...Two rare earth complexes of Ts-β-AlaH with the formula of [Ln2(H2O)4(Ts-β-AlaH)6]n·4nH2O (where Ln = Nd(1), Gd(2); Ts-β-AlaH = N-p-tolylsulfonyl-β-Alanine) have been synthesized and characterized by elemental analysis, IR and X-ray diffraction. The results show that the two complexes are isostructural. They crystallize in a monoclinic system with P21/n space group. Crystal data for 1: a = 0.95149(19) nm, b = 1.9012(4) nm, c = 2.2863(5) nm, β= 100.37(3)°, Z= 4, De= 1.509 mg/cm^3, F(000) = 1880, R1= 0.0560, wR2= 0.1564 [I 〉 2σ(/)]; for 2: a = 0.9495(2) nm, b = 1.9037(4) nm, c = 2.2987(5) nm, β= 99.87(3)°, Z = 4, Dc= 1.541 mg/cm^3, F(000) = 1916, R1= 0.0515, wR2= 0.1566 [I〉2σ(I)]. The two complexes are one-dimensional chains and the coordination number of the Nd^3+ or Gd^3+ ion is nine.展开更多
文摘目的:探讨小鼠疼痛模型的昼夜节律和注射用蜂毒(Bee venom for injection,BVI)镇痛作用的昼夜差异及其相关机制。方法:采用热板法、辐射热甩尾法建立小鼠疼痛模型,在6个授时(Zeitgeber time,ZT)时间点(ZT2、ZT6、ZT10、ZT14、ZT18、ZT22)测量痛阈并分析其昼夜节律。将合格昆明小鼠随机分为注射用蜂毒大剂量(Bee venom for injection-High dose,BVI-H)、注射用蜂毒中剂量(Bee venom for injection-Medium dose,BVI-M)、注射用蜂毒低剂量(Bee venom for injection-low dose,BVI-L)、吗啡(Morphine,MOR)和模型(Model,MOD)组;每组再根据小鼠痛阈的昼夜节律分为两个亚组,分别在痛阈的峰值和谷值2个时间点给药。观察各组对热板法、辐射热甩尾法和扭体法疼痛模型小鼠行为学影响的动态变化;ELISA法检测血清P物质(Substances P,SP)、β-内啡肽(Beta-endorphin,β-EP)和IL-1β(interleukin-1β,IL-1β)水平。结果:小鼠疼痛模型的痛阈显示出峰值在明中期(ZT6)、谷值在暗后期(ZT22)的昼夜节律。BVI三个剂量组和MOR组均显示出明显的镇痛作用,并且BVI在热板法和扭体法模型的镇痛作用具有剂量依赖性。在热板法和辐射热法疼痛模型中,BVI于ZT22给药比ZT6给药显示出更强的镇痛作用。蜂毒对疼痛模型小鼠血清β-EP水平未显示上调作用;但可明显降低血清SP含量,且具有ZT22给药低于ZT6给药的昼夜变化(P<0.05);对扭体法和辐射热法(仅ZT22给药组)疼痛模型小鼠血清IL-1β水平显著下调,而在热板法则显示IL-1β水平明显增高。结论:小鼠的痛阈存在峰值在明中后期、谷值在暗后期的昼夜节律;BVI对小鼠多种疼痛模型均具有镇痛作用,且存在昼夜差异;BVI的镇痛作用及其昼夜变化可能与调节内源性疼痛介质有关。
基金[This work was supported by the National Natural Science Foundation of China (No. 20471026) and the Natural Science Foundation of Henan province of China (No. 0311021200).]
文摘Two rare earth complexes of Ts-β-AlaH with the formula of [Ln2(H2O)4(Ts-β-AlaH)6]n·4nH2O (where Ln = Nd(1), Gd(2); Ts-β-AlaH = N-p-tolylsulfonyl-β-Alanine) have been synthesized and characterized by elemental analysis, IR and X-ray diffraction. The results show that the two complexes are isostructural. They crystallize in a monoclinic system with P21/n space group. Crystal data for 1: a = 0.95149(19) nm, b = 1.9012(4) nm, c = 2.2863(5) nm, β= 100.37(3)°, Z= 4, De= 1.509 mg/cm^3, F(000) = 1880, R1= 0.0560, wR2= 0.1564 [I 〉 2σ(/)]; for 2: a = 0.9495(2) nm, b = 1.9037(4) nm, c = 2.2987(5) nm, β= 99.87(3)°, Z = 4, Dc= 1.541 mg/cm^3, F(000) = 1916, R1= 0.0515, wR2= 0.1566 [I〉2σ(I)]. The two complexes are one-dimensional chains and the coordination number of the Nd^3+ or Gd^3+ ion is nine.