目的探讨脊髓NMDA受体与吸入麻醉药安氟醚、异氟醚、七氟醚镇痛作用的关系。方法建立小鼠注射吸入麻醉药镇痛模型,用热板法和扭体法实验分别观察鞘内注射(it)不同剂量的NMDA对其痛阈的影响。结果NMDA2.5、5、10 ng it对清醒小鼠热板法痛...目的探讨脊髓NMDA受体与吸入麻醉药安氟醚、异氟醚、七氟醚镇痛作用的关系。方法建立小鼠注射吸入麻醉药镇痛模型,用热板法和扭体法实验分别观察鞘内注射(it)不同剂量的NMDA对其痛阈的影响。结果NMDA2.5、5、10 ng it对清醒小鼠热板法痛阈(Pain threshold in hot-p late test,HPPT)和扭体次数无明显影响(P>0.05);NMDA2.5、5、10 ng it可剂量依赖性地减少安氟醚、异氟醚、七氟醚镇痛小鼠的HPPT(P<0.05)和增加扭体反应的次数(P<0.05)。结论脊髓的NMDA受体是吸入麻醉药安氟醚、异氟醚、七氟醚镇痛作用的重要靶位。展开更多
Spinal cord injury(SCI)is a devastating traumatic disease seriously impairing the quality of life in patients.Expectations to allow the hopeless central nervous system to repair itself after injury are unfeasible.Deve...Spinal cord injury(SCI)is a devastating traumatic disease seriously impairing the quality of life in patients.Expectations to allow the hopeless central nervous system to repair itself after injury are unfeasible.Developing new approaches to regenerate the central nervous system is still the priority.Exosomes derived from mesenchymal stem cells(MSC-Exo)have been proven to robustly quench the inflammatory response or oxidative stress and curb neuronal apoptosis and autophagy following SCI,which are the key processes to rescue damaged spinal cord neurons and restore their functions.Nonetheless,MSC-Exo in SCI received scant attention.In this review,we reviewed our previous work and other studies to summarize the roles of MSC-Exo in SCI and its underlying mechanisms.Furthermore,we also focus on the application of exosomes as drug carrier in SCI.In particular,it combs the advantages of exosomes as a drug carrier for SCI,imaging advantages,drug types,loading methods,etc.,which provides the latest progress for exosomes in the treatment of SCI,especially drug carrier.展开更多
目的:观察优效电针干预对炎性痛和坐骨神经分支选择性损伤大鼠的镇痛作用及脊髓背角P2X3蛋白表达的影响。方法:实验分2部分:1)SD大鼠完全随机分为空白组、CFA组、100Hz组和假电针组;2)SD大鼠完全随机分为假SNI组、SNI组、2Hz组和假电针...目的:观察优效电针干预对炎性痛和坐骨神经分支选择性损伤大鼠的镇痛作用及脊髓背角P2X3蛋白表达的影响。方法:实验分2部分:1)SD大鼠完全随机分为空白组、CFA组、100Hz组和假电针组;2)SD大鼠完全随机分为假SNI组、SNI组、2Hz组和假电针组。通过足底皮下注射完全弗氏佐剂建立炎性痛模型;通过结扎并切断左侧腓总神经和胫神经后远端,保留腓肠神经的方法建立坐骨神经分支选择性损伤模型。于造模后1d,100Hz或2Hz电针足三里、昆仑穴,持续干预3d。采用up and down方法检测机械缩足阈,采用免疫印迹法检测患侧脊髓背角P2X3蛋白表达。结果:1)与空白对照组比较,CFA组大鼠机械缩足阈造模后各个时间点都显著下降,CFA组大鼠脊髓背角P2X3蛋白表达增多;与CFA组比较,电针干预1次、3次均能显著提升机械缩足阈,电针干预3次能降低脊髓背角P2X3的蛋白表达,假电针无干预作用。2)与假SNI组比较,SNI组大鼠机械缩足阈造模后各个时间点都显著下降,SNI组大鼠脊髓背角P2X3蛋白表达增多;与SNI组比较,电针干预1次、3次均能显著提升机械缩足阈,电针干预3次能降低脊髓背角P2X3的蛋白表达,假电针无干预作用。结论:100Hz电针可有效干预慢性炎性痛大鼠机械缩足阈,2Hz电针可有效干预神经病理痛大鼠机械缩足阈;其镇痛作用可能与下调脊髓背角P2X3蛋白表达相关。展开更多
目的综述1型神经纤维瘤病(neurofibromatosis type 1,NF1)相关的脊柱畸形致病机制研究进展。方法广泛查阅近年国内外有关NF1相关脊柱畸形致病机制的文献,对其与脊柱畸形的相互联系、相关致病机制及研究进展进行综述。结果目前对于NF1患...目的综述1型神经纤维瘤病(neurofibromatosis type 1,NF1)相关的脊柱畸形致病机制研究进展。方法广泛查阅近年国内外有关NF1相关脊柱畸形致病机制的文献,对其与脊柱畸形的相互联系、相关致病机制及研究进展进行综述。结果目前对于NF1患者发生脊柱畸形的致病机制尚未明确,可能与神经纤维瘤直接侵蚀与压迫、椎管内硬脊膜扩张、褪黑素导致的脊柱旁肌肉收缩力下降、骨量减少与骨质疏松、性早熟以及中胚层发育不良有关。结论 NF1患者的众多临床表现可能是导致其脊柱畸形发生的诱因,NF1相关脊柱畸形致病机制的研究将有助于对NF1脊柱畸形的认识、诊断和治疗。展开更多
文摘目的探讨脊髓NMDA受体与吸入麻醉药安氟醚、异氟醚、七氟醚镇痛作用的关系。方法建立小鼠注射吸入麻醉药镇痛模型,用热板法和扭体法实验分别观察鞘内注射(it)不同剂量的NMDA对其痛阈的影响。结果NMDA2.5、5、10 ng it对清醒小鼠热板法痛阈(Pain threshold in hot-p late test,HPPT)和扭体次数无明显影响(P>0.05);NMDA2.5、5、10 ng it可剂量依赖性地减少安氟醚、异氟醚、七氟醚镇痛小鼠的HPPT(P<0.05)和增加扭体反应的次数(P<0.05)。结论脊髓的NMDA受体是吸入麻醉药安氟醚、异氟醚、七氟醚镇痛作用的重要靶位。
基金The National natural science foundation (82172779)Military scientific research project fund (2019-JCJQ-ZD-120-50).
文摘Spinal cord injury(SCI)is a devastating traumatic disease seriously impairing the quality of life in patients.Expectations to allow the hopeless central nervous system to repair itself after injury are unfeasible.Developing new approaches to regenerate the central nervous system is still the priority.Exosomes derived from mesenchymal stem cells(MSC-Exo)have been proven to robustly quench the inflammatory response or oxidative stress and curb neuronal apoptosis and autophagy following SCI,which are the key processes to rescue damaged spinal cord neurons and restore their functions.Nonetheless,MSC-Exo in SCI received scant attention.In this review,we reviewed our previous work and other studies to summarize the roles of MSC-Exo in SCI and its underlying mechanisms.Furthermore,we also focus on the application of exosomes as drug carrier in SCI.In particular,it combs the advantages of exosomes as a drug carrier for SCI,imaging advantages,drug types,loading methods,etc.,which provides the latest progress for exosomes in the treatment of SCI,especially drug carrier.
文摘目的:观察优效电针干预对炎性痛和坐骨神经分支选择性损伤大鼠的镇痛作用及脊髓背角P2X3蛋白表达的影响。方法:实验分2部分:1)SD大鼠完全随机分为空白组、CFA组、100Hz组和假电针组;2)SD大鼠完全随机分为假SNI组、SNI组、2Hz组和假电针组。通过足底皮下注射完全弗氏佐剂建立炎性痛模型;通过结扎并切断左侧腓总神经和胫神经后远端,保留腓肠神经的方法建立坐骨神经分支选择性损伤模型。于造模后1d,100Hz或2Hz电针足三里、昆仑穴,持续干预3d。采用up and down方法检测机械缩足阈,采用免疫印迹法检测患侧脊髓背角P2X3蛋白表达。结果:1)与空白对照组比较,CFA组大鼠机械缩足阈造模后各个时间点都显著下降,CFA组大鼠脊髓背角P2X3蛋白表达增多;与CFA组比较,电针干预1次、3次均能显著提升机械缩足阈,电针干预3次能降低脊髓背角P2X3的蛋白表达,假电针无干预作用。2)与假SNI组比较,SNI组大鼠机械缩足阈造模后各个时间点都显著下降,SNI组大鼠脊髓背角P2X3蛋白表达增多;与SNI组比较,电针干预1次、3次均能显著提升机械缩足阈,电针干预3次能降低脊髓背角P2X3的蛋白表达,假电针无干预作用。结论:100Hz电针可有效干预慢性炎性痛大鼠机械缩足阈,2Hz电针可有效干预神经病理痛大鼠机械缩足阈;其镇痛作用可能与下调脊髓背角P2X3蛋白表达相关。
文摘目的综述1型神经纤维瘤病(neurofibromatosis type 1,NF1)相关的脊柱畸形致病机制研究进展。方法广泛查阅近年国内外有关NF1相关脊柱畸形致病机制的文献,对其与脊柱畸形的相互联系、相关致病机制及研究进展进行综述。结果目前对于NF1患者发生脊柱畸形的致病机制尚未明确,可能与神经纤维瘤直接侵蚀与压迫、椎管内硬脊膜扩张、褪黑素导致的脊柱旁肌肉收缩力下降、骨量减少与骨质疏松、性早熟以及中胚层发育不良有关。结论 NF1患者的众多临床表现可能是导致其脊柱畸形发生的诱因,NF1相关脊柱畸形致病机制的研究将有助于对NF1脊柱畸形的认识、诊断和治疗。
