小鼠 AQP5 基因的消减会导致鲍曼腺分泌不足引起嗅觉功能障碍。

IF 2.8 4区 心理学 Q1 BEHAVIORAL SCIENCES Chemical Senses Pub Date : 2023-01-01 DOI:10.1093/chemse/bjad030
Xinnan Zhao, Gang Liu, Xin Yu, Xiaohan Yang, Wenting Gao, Zinan Zhao, Tonghui Ma, Jianmei Ma
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引用次数: 0

摘要

嗅觉检测依赖于鼻腔气流,气流可以通过粘液层的扩散将气味吸收到嗅觉上皮。然后,气味会作用于嗅觉神经元(OSN)的化学敏感上皮细胞。因此,嗅觉区域的任何病理变化,例如斯约格伦综合症(SS)引起的鼻腔干燥,都可能干扰嗅觉功能。斯琼格伦综合征是一种自身免疫性疾病,血清中可检测到水蒸发蛋白(AQP)5自身抗体。然而,AQP5 在嗅觉粘膜中的表达及其在嗅觉中的功能尚不清楚。基于对 AQP5 蛋白在鼻粘膜中表达特征的研究,通过嗅觉行为分析发现 AQP5 基因敲除(KO)小鼠的嗅觉功能障碍,同时利用体外分泌测量系统发现鲍曼腺分泌量减少,鼻粘膜层中的酸性粘蛋白也发生了变化。结果表明,AQP5 通过调节作为气味分子溶解介质的鼻腔粘液层的容量和成分,对嗅觉功能做出了贡献。我们的研究结果表明,AQP5可通过调节BGs和OE上部粘液层的水分供应来影响嗅觉功能,这可以解释SS患者嗅觉缺失的原因,AQP5 KO小鼠可作为研究嗅觉功能障碍的理想模型。
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Ablation of AQP5 gene in mice leads to olfactory dysfunction caused by hyposecretion of Bowman's gland.

Smell detection depends on nasal airflow, which can make absorption of odors to the olfactory epithelium by diffusion through the mucus layer. The odors then act on the chemo-sensitive epithelium of olfactory sensory neurons (OSNs). Therefore, any pathological changes in the olfactory area, for instance, dry nose caused by Sjögren's Syndrome (SS) may interfere with olfactory function. SS is an autoimmune disease in which aquaporin (AQP) 5 autoantibodies have been detected in the serum. However, the expression of AQP5 in olfactory mucosa and its function in olfaction is still unknown. Based on the study of the expression characteristics of AQP5 protein in the nasal mucosa, the olfaction dysfunction in AQP5 knockout (KO) mice was found by olfactory behavior analysis, which was accompanied by reduced secretion volume of Bowman's gland by using in vitro secretion measure system, and the change of acid mucin in nasal mucus layer was identified. By excluding the possibility that olfactory disturbance was caused by changes in OSNs, the result indicated that AQP5 contributes to olfactory functions by regulating the volume and composition of OE mucus layer, which is the medium for the dissolution of odor molecules. Our results indicate that AQP5 can affect the olfactory functions by regulating the water supply of BGs and the mucus layer upper the OE that can explain the olfactory loss in the patients of SS, and AQP5 KO mice might be used as an ideal model to study the olfactory dysfunction.

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来源期刊
Chemical Senses
Chemical Senses 医学-行为科学
CiteScore
8.60
自引率
2.90%
发文量
25
审稿时长
1 months
期刊介绍: Chemical Senses publishes original research and review papers on all aspects of chemoreception in both humans and animals. An important part of the journal''s coverage is devoted to techniques and the development and application of new methods for investigating chemoreception and chemosensory structures.
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