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首页> 外文期刊>Journal of Neurophysiology >Inflammatory stimuli acutely modulate peripheral taste function
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Inflammatory stimuli acutely modulate peripheral taste function

机译:炎症刺激会急性调节外周味觉功能

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Inflammation mediatedchanges in taste perception can affect health outcomes in patients, but little is known about the underlying mechanisms. In the present work, we hypothesized that proinflanunatory cytokines directly modulate Na+ transport in taste buds. To test this, we measured acute changes in Na+ flux in polarized fungiform taste buds loaded with a Na+ indicator dye. elicited an amiloridesensitive increase in Na+ transport in taste buds. In contrast, TNF-alpha dramatically and reversibly decreased Na+ flux in polarized taste buds via amiloride-sensitive and amiloride-insensitive Na+ transport systems. The speed and partial amiloride sensitivity of these changes in Na I flux indicate that IL-1 beta and TNF-alpha modulate epithelial Na+ channel (ENaC) function. A portion of the TNF-mediated decrease in Na+ flux is also blocked by the TRPVI antagonist capsazepine, although TNF-alpha further reduced Na+ transport independently of both amiloride and capsazepine. We also assessed taste function in vivo in a model of infection and inflammation that elevates these and additional cytokines. In rats administered systemic lipopolysaccharide (LPS), CT responses to Na+ were significantly elevated between 1 and 2 h after LPS treatment. Low, normally preferred concentrations of NaCi and sodium acetate elicited high response magnitudes. Consistent with this outcome, codelivery of IL-10 and TNF-alpha enhanced Na+ flux in polarized taste buds. These results demonstrate that inflammation elicits swift changes in Na' taste function, which may limit salt consumption during illness.
机译:炎症介导的味觉改变会影响患者的健康状况,但对其潜在机制知之甚少。在目前的工作中,我们假设促胰岛素原细胞因子直接调节味蕾中的Na +转运。为了测试这一点,我们测量了装载有Na +指示剂染料的极化真菌状味蕾中Na +通量的急性变化。引起味蕾中Na +转运的阿米洛利敏感性增加。相比之下,TNF-α通过阿米洛利敏感和阿米洛利不敏感的Na +转运系统显着且可逆地降低了极化味蕾中的Na +通量。这些Na I通量变化的速度和部分阿米洛利敏感性表明,IL-1β和TNF-α调节上皮Na +通道(ENaC)功能。 TNF介导的Na +通量下降的一部分也被TRPVI拮抗剂卡塞平抑制,尽管TNF-α进一步独立于阿米洛利和卡塞平均降低了Na +转运。我们还在感染和炎症模型中评估了体内的味觉功能,这些模型会升高这些和其他细胞因子。在使用全身性脂多糖(LPS)的大鼠中,LPS治疗后1至2小时内,对Na +的CT反应显着升高。通常较低的NaCi和乙酸钠浓度会引起较高的响应幅度。与此结果一致,IL-10和TNF-α的代码传递增强了极化味蕾中的Na +通量。这些结果表明,炎症引起Na'味觉功能的快速变化,这可能会限制疾病期间的食盐量。

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