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Anxiety-like behavior induced by salicylate depends on age and can be prevented by a single dose of 5-MeO-DMT.
Experimental Neurology ( IF 5.3 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.expneurol.2020.113175
Jessica Winne 1 , Barbara C Boerner 2 , Thawann Malfatti 2 , Elis Brisa 2 , Jhulimar Doerl 3 , Ingrid Nogueira 2 , Katarina E Leão 2 , Richardson N Leão 4
Affiliation  

Salicylate intoxication is a cause of tinnitus and comorbidly associated with anxiety in humans. In a previous work, we showed that salicylate induces anxiety-like behavior and hippocampal type 2 theta oscillations (theta2) in mice. Here we investigate if the anxiogenic effect of salicylate is dependent on age and previous tinnitus experience. We also tested whether a single dose of DMT can prevent this effect. Using microwire electrode arrays, we recorded local field potential in young (4-5- month-old) and old (11-13-month-old) mice to study the electrophysiological effect of tinnitus in the ventral hippocampus (vHipp) and medial prefrontal cortex (mPFC) in an open field arena and elevated plus maze 1h after salicylate (300mg/kg) injection. We found that anxiety-like behavior and increase in theta2 oscillations (4-6 Hz), following salicylate pre-treatment, only occurs in young (normal hearing) mice. We also show that theta2 and slow gamma oscillations increase in the vHipp and mPFC in a complementary manner during anxiety tests in the presence of salicylate. Finally, we show that pre-treating mice with a single dose of the hallucinogenic 5-MeO-DMT prevents anxiety-like behavior and the increase in theta2 and slow gamma oscillations after salicylate injection in normal hearing young mice. This work further support the hypothesis that anxiety-like behavior after salicylate injection is triggered by tinnitus and require normal hearing. Moreover, our results show that hallucinogenic compounds can be effective in treating tinnitus-related anxiety.

中文翻译:

水杨酸酯引起的焦虑样行为取决于年龄,可以通过单剂量5-MeO-DMT来预防。

水杨酸盐中毒是耳鸣的原因,并与人类的焦虑症相关。在以前的工作中,我们证明了水杨酸酯可诱发小鼠的焦虑样行为和海马2型theta振荡(theta2)。在这里,我们调查了水杨酸盐的抗焦虑作用是否取决于年龄和以前的耳鸣经验。我们还测试了单剂DMT是否可以预防这种作用。使用微线电极阵列,我们记录了年轻(4-5个月大)和年老(11-13个月大)小鼠的局部场电位,以研究耳鸣在腹侧海马(vHipp)和内侧前额叶中的电生理作用水杨酸盐(300mg / kg)注射后1h,在开放场地上皮层(mPFC)并升高迷宫。我们发现类似焦虑的行为和theta2振荡(4-6 Hz)的增加,水杨酸盐预处理后,仅发生在年幼(正常听力)小鼠中。我们还显示,在水杨酸存在下的焦虑测试过程中,vHipp和mPFC中的theta2和慢速伽马振荡以互补的方式增加。最后,我们表明,在正常听力的年轻小鼠中,用单剂量的致幻剂5-MeO-DMT预处理小鼠可预防焦虑样行为以及水杨酸酯注射后theta2的增加和慢伽马振荡。这项工作进一步支持了以下假设:水杨酸酯注射后的焦虑样行为是由耳鸣触发的,需要正常的听力。此外,我们的结果表明,致幻化合物可以有效治疗耳鸣相关的焦虑症。我们还显示,在水杨酸存在下的焦虑测试过程中,vHipp和mPFC中的theta2和慢速伽马振荡以互补的方式增加。最后,我们表明,在正常听力的年轻小鼠中,用单剂量的致幻剂5-MeO-DMT预处理小鼠可预防焦虑样行为以及水杨酸酯注射后theta2的增加和慢伽马振荡。这项工作进一步支持了以下假设:水杨酸酯注射后的焦虑样行为是由耳鸣触发的,需要正常的听力。此外,我们的结果表明,致幻化合物可以有效治疗耳鸣相关的焦虑症。我们还显示,在水杨酸存在下的焦虑测试过程中,vHipp和mPFC中的theta2和慢速伽马振荡以互补的方式增加。最后,我们表明,在正常听力的年轻小鼠中,用单剂量的致幻剂5-MeO-DMT预处理小鼠可预防焦虑样行为以及水杨酸酯注射后theta2的增加和慢伽马振荡。这项工作进一步支持了以下假设:水杨酸酯注射后的焦虑样行为是由耳鸣触发的,需要正常的听力。此外,我们的结果表明,致幻化合物可以有效治疗耳鸣相关的焦虑症。我们显示,用单剂量的致幻剂5-MeO-DMT进行预处理的小鼠可预防焦虑样行为,以及在正常听力的年轻小鼠中注射水杨酸酯后,theta2的增加和慢伽马振荡。这项工作进一步支持了以下假设:水杨酸酯注射后的焦虑样行为是由耳鸣触发的,需要正常的听力。此外,我们的结果表明,致幻化合物可以有效治疗耳鸣相关的焦虑症。我们显示,用单剂量的致幻剂5-MeO-DMT进行预处理的小鼠可预防焦虑样行为,以及在正常听力的年轻小鼠中注射水杨酸酯后,theta2的增加和慢伽马振荡。这项工作进一步支持了以下假设:水杨酸酯注射后的焦虑样行为是由耳鸣触发的,需要正常的听力。此外,我们的结果表明,致幻化合物可以有效治疗耳鸣相关的焦虑症。
更新日期:2020-01-08
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