5-HT1A autoreceptor levels determine vulnerability to stress and response to antidepressants.

5-HT1A autoreceptor levels determine vulnerability to stress and response to antidepressants.
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DOI:
10.1016/j.neuron.2009.12.003
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发表时间:
2010-01-14
期刊:
影响因子:
16.2
通讯作者:
Leonardo, E. David
Leonardo, E. David
中科院分区:
医学1区
文献类型:
--
作者:
Richardson-Jones, Jesse W.;Craige, Caryne P.;Guiard, Bruno P.;Stephen, Alisson;Metzger, Kayla L.;Kung, Hank F.;Gardier, Alain M.;Dranovsky, Alex;David, Denis J.;Beck, Sheryl G.;Hen, Rene;Leonardo, E. David

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大多数抑郁症患者对他们的第一次药物治疗没有反应,这种治疗抵抗的原因仍然是谜。人类研究表明,5-羟色胺- 1a (5-HT1A)受体基因启动子的多态性与抑郁症易感性增加和治疗反应降低有关。在这里,我们开发了一种新的策略,在不影响5-HT1A异受体的情况下操纵中脑核中的5-HT1A自受体,产生更高(1A-High)或更低(1A-Low)的自受体水平的小鼠。我们的研究表明,这有力地影响中缝放电率,但对基础前脑血清素水平或冲突焦虑测量没有影响。然而,与1A-Low小鼠相比,1A-High小鼠对急性应激的生理反应迟钝,行为绝望增加,对抗抑郁药没有行为反应,模拟了5-HT1A风险等位基因患者。此外,在抗抑郁治疗前降低5-HT1A自身受体水平足以将无反应者转化为反应者。这些结果建立了5-HT1A自身受体水平、应激恢复力和抗抑郁药物反应之间的因果关系。
Most depressed patients don't respond to their first drug treatment, and the reasons for this treatment resistance remain enigmatic. Human studies implicate a polymorphism in the promoter of the serotonin-1A (5-HT1A) receptor gene in increased susceptibility to depression and decreased treatment response. Here we develop a new strategy to manipulate 5-HT1A autoreceptors in raphe nuclei without affecting 5-HT1A heteroreceptors, generating mice with higher (1A-High) or lower (1A-Low) autoreceptor levels. We show that this robustly affects raphe firing rates, but has no effect on either basal forebrain serotonin levels or conflict-anxiety measures. However, compared to 1A-Low mice, 1A-High mice show a blunted physiological response to acute stress, increased behavioral despair, and no behavioral response to antidepressant, modeling patients with the 5-HT1A risk allele. Furthermore, reducing 5-HT1A autoreceptor levels prior to antidepressant treatment is sufficient to convert non-responders into responders. These results establish a causal relationship between 5-HT1A autoreceptor levels, resilience under stress, and response to antidepressants.
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