The Effect of DREADD Activation of Leptin Receptor Positive Neurons in the Nucleus of the Solitary Tract on Sleep Disordered Breathing.

The Effect of DREADD Activation of Leptin Receptor Positive Neurons in the Nucleus of the Solitary Tract on Sleep Disordered Breathing.
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DREADD激活孤束核瘦素受体阳性神经元对睡眠呼吸障碍的影响

DOI:
10.3390/ijms22136742
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发表时间:
2021-06-23
影响因子:
5.6
通讯作者:
Polotsky VY
Polotsky VY
中科院分区:
生物学2区
文献类型:
--
作者:
Amorim MR;Dergacheva O;Fleury-Curado T;Pho H;Freire C;Mendelowitz D;Branco LGS;Polotsky VY

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阻塞性睡眠呼吸暂停(OSA)是由于睡眠期间上气道肌张力丧失而导致的上气道反复阻塞。 OSA 非常普遍,尤其是在肥胖人群中。 OSA 没有药物治疗方法。先前的研究已经证明了瘦素(一种脂肪组织产生的激素)作为有效的呼吸兴奋剂的作用。瘦素信号传导通过孤束核 (NTS) 核中瘦素受体 LEPRb 的长功能亚型进行,与呼吸控制有关。我们假设瘦素作用于 NTS 中的 LEPRb 阳性神经元,以增加肥胖小鼠睡眠期间的通气并维持上呼吸道通畅。我们在患有饮食诱导肥胖 (DIO) 的 Leprb-Cre-GFP 小鼠 NTS 的 LEPRb 阳性神经元中选择性表达仅由设计药物 (DREADD) 激活的设计受体,并检查了 DREADD 配体 J60 对睡眠期间舌肌活动和呼吸的影响。 J60 是 LEPRb 阳性 NTS 神经元的有效激活剂,但在 NREM 和 REM 睡眠期间不会刺激呼吸或上呼吸道肌肉。我们的结论是,在 DIO 小鼠中,瘦素对睡眠期间呼吸的刺激作用与 NTS 中的 LEPRb 信号传导无关。
Obstructive sleep apnea (OSA) is recurrent obstruction of the upper airway due to the loss of upper airway muscle tone during sleep. OSA is highly prevalent, especially in obesity. There is no pharmacotherapy for OSA. Previous studies have demonstrated the role of leptin, an adipose-tissue-produced hormone, as a potent respiratory stimulant. Leptin signaling via a long functional isoform of leptin receptor, LEPRb, in the nucleus of the solitary tract (NTS), has been implicated in control of breathing. We hypothesized that leptin acts on LEPRb positive neurons in the NTS to increase ventilation and maintain upper airway patency during sleep in obese mice. We expressed designer receptors exclusively activated by designer drugs (DREADD) selectively in the LEPRb positive neurons of the NTS of Leprb-Cre-GFP mice with diet-induced obesity (DIO) and examined the effect of DREADD ligand, J60, on tongue muscle activity and breathing during sleep. J60 was a potent activator of LEPRb positive NTS neurons, but did not stimulate breathing or upper airway muscles during NREM and REM sleep. We conclude that, in DIO mice, the stimulating effects of leptin on breathing during sleep are independent of LEPRb signaling in the NTS.
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