Enhancing depression mechanisms in midbrain dopamine neurons achieves homeostatic resilience.

Enhancing depression mechanisms in midbrain dopamine neurons achieves homeostatic resilience.
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DOI:
10.1126/science.1249240
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发表时间:
2014-04-18
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Han MH
Han MH
中科院分区:
其他
文献类型:
--
作者:
Friedman AK;Walsh JJ;Juarez B;Ku SM;Chaudhury D;Wang J;Li X;Dietz DM;Pan N;Vialou VF;Neve RL;Yue Z;Han MH

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Typical therapies try to reverse pathogenic mechanisms. Here, we describe treatment effects by enhancing depression-causing mechanisms in ventral tegmental area (VTA) dopamine (DA) neurons. In a social defeat stress model of depression, depressed (susceptible) mice display hyperactivity of VTA DA neurons, caused by an up-regulated hyperpolarization-activated current (Ih). Mice resilient to social defeat stress, however, exhibit stable normal firing of these neurons. Unexpectedly, resilient mice had an even larger Ih, which was observed in parallel with increased potassium (K+) channel currents. Experimentally enhancing the firing-increasing Ih or optogenetically increasing the hyperactivity of VTA DA neurons in susceptible mice, completely reversed depression-related behaviors, an antidepressant effect achieved through resilience-like, projection-specific homeostatic plasticity. These results indicate a potential therapeutic path of promoting natural resilience for depression treatment.
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