当前位置: X-MOL 学术Chem. Senses › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
ENaC-Dependent Sodium Chloride Taste Responses in the Regenerated Rat Chorda Tympani Nerve After Lingual Gustatory Deafferentation Depend on the Taste Bud Field Reinnervated.
Chemical Senses ( IF 2.8 ) Pub Date : 2020-05-21 , DOI: 10.1093/chemse/bjaa015
Enshe Jiang 1, 2, 3, 4 , Ginger D Blonde 3, 4 , Mircea Garcea 3 , Alan C Spector 3, 4
Affiliation  

The chorda tympani (CT) nerve is exceptionally responsive to NaCl. Amiloride, an epithelial Na+ channel (ENaC) blocker, consistently and significantly decreases the NaCl responsiveness of the CT but not the glossopharyngeal (GL) nerve in the rat. Here, we examined whether amiloride would suppress the NaCl responsiveness of the CT when it cross-reinnervated the posterior tongue (PT). Whole-nerve electrophysiological recording was performed to investigate the response properties of the intact (CTsham), regenerated (CTr), and cross-regenerated (CT-PT) CT in male rats to NaCl mixed with and without amiloride and common taste stimuli. The intact (GLsham) and regenerated (GLr) GL were also examined. The CT responses of the CT-PT group did not differ from those of the GLr and GLsham groups, but did differ from those of the CTr and CTsham groups for some stimuli. Importantly, the responsiveness of the cross-regenerated CT to a series of NaCl concentrations was not suppressed by amiloride treatment, which significantly decreased the response to NaCl in the CTr and CTsham groups and had no effect in the GLr and GLsham groups. This suggests that the cross-regenerated CT adopts the taste response properties of the GL as opposed to those of the regenerated CT or intact CT. This work replicates the 5 decade-old findings of Oakley and importantly extends them by providing compelling evidence that the presence of functional ENaCs, essential for sodium taste recognition in regenerated taste receptor cells, depends on the reinnervated lingual region and not on the reinnervating gustatory nerve, at least in the rat.

中文翻译:

ENaC依赖的舌味去脱胃后再生大鼠中的鼓膜神经的氯化钠味觉响应取决于味蕾场的神经再生。

鼓膜鼓膜(CT)神经对NaCl异常敏感。阿米洛利是一种上皮Na +通道(ENaC)阻滞剂,在大鼠中持续且显着降低了CT的NaCl反应性,但并未降低舌咽(GL)神经。在这里,我们检查了阿米洛利与后舌(PT)交叉神经支配时是否会抑制CT的NaCl反应性。进行全神经电生理记录,以研究雄性大鼠完整(CTsham),再生(CTr)和交叉再生(CT-PT)CT对NaCl混合或不混合阿米洛利和常见味觉刺激的反应特性。还检查了完整(GLsham)和再生(GLr)GL。CT-PT组的CT反应与GLr和GLsham组没有什么不同,但是在某些刺激方面确实与CTr和CTsham组不同。重要的是,阿米洛利治疗并未抑制交叉再生CT对一系列NaCl浓度的反应,这在CTr和CTsham组中显着降低了对NaCl的反应,而在GLr和GLsham组中则没有影响。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了Oakley 5年前的发现,并通过提供令人信服的证据来证明其功能性ENaC的存在,这些信息对再生味觉受体细胞中钠味识别至关重要,而功能性ENaC的存在取决于神经支配的舌部区域,而不取决于神经支配的味觉神经,至少在大鼠中。阿米洛利治疗并未抑制交叉再生CT对一系列NaCl浓度的响应,这在CTr和CTsham组中显着降低了对NaCl的响应,在GLr和GLsham组中没有影响。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了Oakley 5年前的发现,并通过提供令人信服的证据来证明其功能性ENaC的存在,这些信息对再生味觉受体细胞中钠味识别至关重要,而功能性ENaC的存在取决于神经支配的舌部区域,而不取决于神经支配的味觉神经,至少在大鼠中。阿米洛利治疗并不能抑制交叉再生CT对一系列NaCl浓度的响应,这在CTr和CTsham组中显着降低了对NaCl的响应,而对GLr和GLsham组没有影响。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了Oakley 5年前的发现,并通过提供令人信服的证据来证明其功能性ENaC的存在,这些信息对再生味觉受体细胞中钠味识别至关重要,而功能性ENaC的存在取决于神经支配的舌部区域,而不取决于神经支配的味觉神经,至少在大鼠中。这在CTr和CTsham组中显着降低了对NaCl的反应,而在GLr和GLsham组中没有作用。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了Oakley 5年前的发现,并通过提供令人信服的证据来证明其功能性ENaC的存在,这些信息对再生味觉受体细胞中钠味识别至关重要,而功能性ENaC的存在取决于神经支配的舌部区域,而不取决于神经支配的味觉神经,至少在大鼠中。这在CTr和CTsham组中显着降低了对NaCl的反应,而在GLr和GLsham组中没有作用。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了奥克利(Oakley)5年来的发现,并通过提供令人信服的证据证明功能性ENaCs的存在(对再生味觉受体细胞中钠味识别必不可少)的存在,取决于其神经支配的舌部区域,而不依赖于神经支配的味觉神经。 ,至少在老鼠中。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了Oakley 5年前的发现,并通过提供令人信服的证据来证明其功能性ENaC的存在,这些信息对再生味觉受体细胞中钠味识别至关重要,而功能性ENaC的存在取决于神经支配的舌部区域,而不取决于神经支配的味觉神经,至少在老鼠中。这表明,与再生CT或完整CT相反,交叉再生CT采用GL的味觉特性。这项工作重复了Oakley 5年前的发现,并通过提供令人信服的证据来证明其功能性ENaC的存在,这些信息对再生味觉受体细胞中钠味识别至关重要,而功能性ENaC的存在取决于神经支配的舌部区域,而不取决于神经支配的味觉神经,至少在大鼠中。
更新日期:2020-03-10
down
wechat
bug