Elimination of glutamatergic transmission from Hb9 interneurons does not impact treadmill locomotion.

Elimination of glutamatergic transmission from Hb9 interneurons does not impact treadmill locomotion.
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DOI:
10.1038/s41598-021-95143-y
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发表时间:
2021-08-06
期刊:
影响因子:
4.6
通讯作者:
Brownstone RM
Brownstone RM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Koronfel LM;Kanning KC;Alcos A;Henderson CE;Brownstone RM

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脊髓包含神经回路,可以产生运动活动的节奏和模式。先前已经假设,一群被称为Hb9中间神经元的多巴胺能神经元有助于运动节律发生。这些神经元通过其同源框基因Hb9的表达来鉴定,该基因也在运动神经元中表达。我们开发了一种小鼠品系,其中Cre重组酶活性在表达Hb9的神经元中是可诱导的。然后,我们用这条线消除囊泡谷氨酸转运蛋白2从Hb9中间神经元,并发现有没有缺陷的跑步机运动。我们得出结论,Hb9中间神经元的神经递质是不需要的运动行为。这些神经元在神经回路中的作用仍然难以捉摸。
The spinal cord contains neural circuits that can produce the rhythm and pattern of locomotor activity. It has previously been postulated that a population of glutamatergic neurons, termed Hb9 interneurons, contributes to locomotor rhythmogenesis. These neurons were identified by their expression of the homeobox gene, Hb9, which is also expressed in motor neurons. We developed a mouse line in which Cre recombinase activity is inducible in neurons expressing Hb9. We then used this line to eliminate vesicular glutamate transporter 2 from Hb9 interneurons, and found that there were no deficits in treadmill locomotion. We conclude that glutamatergic neurotransmission by Hb9 interneurons is not required for locomotor behaviour. The role of these neurons in neural circuits remains elusive.
脊柱HB9 :: Cre衍生的兴奋性中间神经元在小鼠中产生节奏。
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