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Human Mast Cell Proteome Reveals Unique Lineage, Putative Functions, and Structural Basis for Cell Ablation.
Immunity ( IF 25.5 ) Pub Date : 2020-02-11 , DOI: 10.1016/j.immuni.2020.01.012
Thomas Plum 1 , Xi Wang 2 , Mandy Rettel 3 , Jeroen Krijgsveld 4 , Thorsten B Feyerabend 5 , Hans-Reimer Rodewald 5
Affiliation  

Mast cells are rare tissue-resident cells of importance to human allergies. To understand the structural basis of principle mast cell functions, we analyzed the proteome of primary human and mouse mast cells by quantitative mass spectrometry. We identified a mast-cell-specific proteome signature, indicative of a unique lineage, only distantly related to other immune cell types, including innate immune cells. Proteome comparison between human and mouse suggested evolutionary conservation of core mast cell functions. In addition to specific proteases and proteins associated with degranulation and proteoglycan biosynthesis, mast cells expressed proteins potentially involved in interactions with neurons and neurotransmitter metabolism, including cell adhesion molecules, ion channels, and G protein coupled receptors. Toward targeted cell ablation in severe allergic diseases, we used MRGPRX2 for mast cell depletion in human skin biopsies. These proteome analyses suggest a unique role of mast cells in the immune system, probably intertwined with the nervous system.

中文翻译:

人类肥大细胞蛋白质组揭示了细胞消融的独特谱系,推定功能和结构基础。

肥大细胞是稀有的组织驻留细胞,对人体过敏很重要。为了了解主要肥大细胞功能的结构基础,我们通过定量质谱分析了主要的人类和小鼠肥大细胞的蛋白质组。我们鉴定出肥大细胞特有的蛋白质组特征,表明独特的谱系,仅与其他免疫细胞类型(包括先天免疫细胞)远缘相关。人与小鼠之间的蛋白质组比较表明核心肥大细胞功能的进化保守性。除了与脱粒和蛋白聚糖生物合成相关的特定蛋白酶和蛋白质外,肥大细胞还表达可能与神经元和神经递质代谢相互作用的蛋白质,包括细胞粘附分子,离子通道和G蛋白偶联受体。为了针对严重过敏性疾病中的靶向细胞消融,我们在人类皮肤活检中使用MRGPRX2进行肥大细胞清除。这些蛋白质组学分析表明,肥大细胞在免疫系统中可能具有独特的作用,可能与神经系统交织在一起。
更新日期:2020-02-11
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