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科学家尝试用疫苗治疗精神疾病
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Topic: 科学家尝试用疫苗治疗精神疾病 (Read 252 times)
Abbey_j
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科学家尝试用疫苗治疗精神疾病
June 13, 2015, 08:12:30 AM
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2015年6月,在加拿大维多利亚国际行为神经科学学会上,科罗拉多大学博尔德分校神经科学家Christopher Lowry介绍了他们关于免疫反应和恐惧行为之间的联系。他说,炎症在精神病学中作用研究受到广泛重视。
关于军人的许多研究发现,免疫功能能影响创伤后应激障碍的发生。血液中含有高水平免疫蛋白CRP,或者因为遗传缺陷导致高水平CRP的战士,更容易发生创伤后应激障碍。
为检验免疫系统是否会影响恐惧和焦虑反应,Lowry等给小鼠注射分支杆菌(结核?)疫苗,每周注射1次连续3周,从而激活其免疫系统。然后与对照未免疫动物一起放于大型攻击性动物(猫?)笼内。结果发现,注射疫苗的小鼠比对照组动物处理恐惧的能力更强,不会像对照动物那样轻易放弃逃跑。对照组动物会发展为结肠炎,肠道细菌类型转变为和应激相关的类型。接受免疫的小鼠的胃肠道更健康。
第二个实验中,Lowry等用大鼠电击足底关联声音建立心理恐惧刺激,给注射疫苗能提高动物应付恐惧声音的能力,动物免疫后更快速地失去恐惧行为,说明调节免疫如普通疫苗,能作为创伤后应激障碍的治疗和预防手段。
Lowry说,他的小组目前正在申请开展临床实验,用分支杆菌疫苗预防和治疗神经精神疾病,他希望能早日获得政府监管机构的授权。
美国护理研究院神经遗传组学专家Jessica Gill说,用疫苗预防创伤应激障碍的想法非常有意思,预防应激损伤对那些将应对强大应激的人群具有重要价值。
同一学术会议上介绍的另外一项研究中,美国国家灵长类动物研究中心神经科学家Matthew Young用点击小鼠足底实验,证明注射细菌表面分子启动免疫反应后,注射细菌成分12小时后,动物的恐惧反应明显提高。
英国曼彻斯特大学神经科学家Bill Deakin说这些研究太有意思了,他现在开始进行一项临床研究,给200名精神分裂症受试者注射二甲胺四环素,这是一种抗生素,被证明能很好地控制大脑炎症反应。他的研究是确定是否这种抑制中枢神经炎症的药物能阻止精神分裂症疾病早期的大脑灰质萎缩。类似研究发现,二甲胺四环素具有缓解精神分裂症临床症状的作用。
Deakin希望这种治疗能对一些有精神分裂症遗传风险的人或一些早期精神分裂症患者产生好处。
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