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A single-cell transcriptomic census of mammalian olfactory epithelium aging
Developmental Cell ( IF 10.7 ) Pub Date : 2024-08-21 , DOI: 10.1016/j.devcel.2024.07.020 Weihao Li 1 , Tingting Wu 2 , Kesen Zhu 2 , Guangyi Ba 2 , Jinxia Liu 2 , Ping Zhou 2 , Shengjv Li 2 , Li Wang 2 , Huanhai Liu 3 , Wenwen Ren 3 , Hongmeng Yu 1 , Yiqun Yu 1
Developmental Cell ( IF 10.7 ) Pub Date : 2024-08-21 , DOI: 10.1016/j.devcel.2024.07.020 Weihao Li 1 , Tingting Wu 2 , Kesen Zhu 2 , Guangyi Ba 2 , Jinxia Liu 2 , Ping Zhou 2 , Shengjv Li 2 , Li Wang 2 , Huanhai Liu 3 , Wenwen Ren 3 , Hongmeng Yu 1 , Yiqun Yu 1
Affiliation
Mammalian olfactory epithelium has the capacity of self-renewal throughout life. Aging is one of the major causes leading to the olfactory dysfunction. Here, we performed single-cell RNA sequencing (scRNA-seq) analysis on young and aged murine olfactory epithelium (OE) and identified aging-related differentially expressed genes (DEGs) throughout 21 cell types. Aging led to the presence of activated horizontal basal cells (HBCs) in the OE and promoted cellular interaction between HBCs and neutrophils. Aging enhanced the expression of Egr1 and Fos in sustentacular cell differentiation from multipotent progenitors, whereas Bcl11b was downregulated during the sensory neuronal homeostasis in the aged OE. Egr1 and Cebpb were predictive core regulatory factors of the transcriptional network in the OE. Overexpression of Egr1 in aged OE organoids promoted cell proliferation and neuronal differentiation. Moreover, aging altered expression levels and frequencies of olfactory receptors. These findings provide a cellular and molecular framework of OE aging at the single-cell resolution.
中文翻译:
哺乳动物嗅觉上皮细胞衰老的单细胞转录组学普查
哺乳动物嗅觉上皮具有终生自我更新的能力。衰老是导致嗅觉功能障碍的主要原因之一。在这里,我们对年轻和老年小鼠嗅觉上皮 (OE) 进行了单细胞 RNA 测序 (scRNA-seq) 分析,并在 21 种细胞类型中鉴定了与衰老相关的差异表达基因 (DEG)。衰老导致 OE 中存在活化的水平基底细胞 (HBC),并促进了 HBC 和中性粒细胞之间的细胞相互作用。衰老增强了 Egr1 和 Fos 在多能祖细胞分化中表达,而 Bcl11b 在老年 OE 的感觉神经元稳态期间下调。Egr1 和 Cebpb 是 OE 中转录网络的预测性核心调节因子。在老年 OE 类器官中过表达 Egr1 促进了细胞增殖和神经元分化。此外,衰老改变了嗅觉受体的表达水平和频率。这些发现提供了单细胞分辨率下 OE 衰老的细胞和分子框架。
更新日期:2024-08-21
中文翻译:
哺乳动物嗅觉上皮细胞衰老的单细胞转录组学普查
哺乳动物嗅觉上皮具有终生自我更新的能力。衰老是导致嗅觉功能障碍的主要原因之一。在这里,我们对年轻和老年小鼠嗅觉上皮 (OE) 进行了单细胞 RNA 测序 (scRNA-seq) 分析,并在 21 种细胞类型中鉴定了与衰老相关的差异表达基因 (DEG)。衰老导致 OE 中存在活化的水平基底细胞 (HBC),并促进了 HBC 和中性粒细胞之间的细胞相互作用。衰老增强了 Egr1 和 Fos 在多能祖细胞分化中表达,而 Bcl11b 在老年 OE 的感觉神经元稳态期间下调。Egr1 和 Cebpb 是 OE 中转录网络的预测性核心调节因子。在老年 OE 类器官中过表达 Egr1 促进了细胞增殖和神经元分化。此外,衰老改变了嗅觉受体的表达水平和频率。这些发现提供了单细胞分辨率下 OE 衰老的细胞和分子框架。