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在中脑多巴胺神经元中增强抑郁机制,可以实现恒常性弹性

Allyson K Friedman¹, Jessica J Walsh, Barbara Juarez

¹Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.

Science (New York, N.Y.)

|April 19, 2014

概括

增强腹膜区域 (VTA) 多巴胺 (DA) 神经元中导致抑郁的机制,逆转了小鼠的抑郁相关行为. 这种方法促进了自然的性,为抑郁症提供了一种新的治疗策略.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
精神病学是一个精神病学.

背景情况:

抑郁症治疗通常针对病原性机制.
在抑郁症中,腹膜区域 (VTA) 多巴胺 (DA) 神经元的作用是复杂的.
与敏感性相比,抗压能力可能涉及不同的神经机制.

研究的目的:

为了研究增强VTA DA神经元中导致抑郁的机制的影响.
探索促进自然弹性作为抑郁症治疗策略的潜力.
了解压力弹性背后的神经可塑性.

主要方法:

在小鼠中利用了社会失败压力模型.
测量了VTA DA神经元的过度活动和超极化激活电流 (I(h)).
在敏感小鼠中使用光遗传学和实验性增强I (h).

主要成果:

患有抑郁症的小鼠表现出VTA DA神经元的过度活跃,这是由于上调的I (h).
弹性小鼠表现出较大的I(h) 和增加的 (K(+)) 通道电流的稳定发射.
在易受影响的小鼠中增强I (h) 或VTA DA神经元的过度活动,逆转了与抑郁症相关的行为.

结论:

增强VTA DA神经元的过度活动可以逆转与抑郁症相关的行为.
促进类似于弹性的恒常性可塑性为抑郁症提供了潜在的治疗途径.
这项研究表明,在抑郁症治疗中,人们应该转向增强抑郁症治疗的自然弹性机制.

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