加勒-8调节人类骨质细胞活性,部分是通过异构体特异性相互作用.
Michèle Roy1, Léopold Mbous Nguimbus1, Papa Yaya Badiane1
1Division of Rheumatology, Department of Medicine, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Canada.
Life science alliance
|February 23, 2024
概括
这项研究揭示了加勒-8的存在.
科学领域:
- 骨质细胞生物学 骨质细胞生物学
- 细胞信号传递 细胞信号传递
- 分子相互作用分子相互作用.
背景情况:
- 在骨质细胞中,LGALS8 (galectin-8) 的替代拼接减少了长异构体的表达.
- 已知加勒-8在细胞矩阵相互作用和危险识别中的作用,但其在骨质细胞中的功能未被描述.
- 骨质细胞过度活跃与骨疾病有关.
研究的目的:
- 调查加勒-8在人类骨质细胞功能中的作用.
- 确定加勒-8异型对骨质细胞生物学的具体贡献.
- 为了识别骨质细胞中的加勒-8相互作用蛋白.
主要方法:
- 在人类骨质细胞中抑制加勒-8的表达.
- 异形特异性抑制了加勒-8.
- 液体色谱与双重质谱 (LC-MS/MS) 蛋白质组分析.
- 在人类骨质细胞中确认蛋白质相互作用.
主要成果:
- 盖莱克-8的抑制会影响骨质再吸收,骨质细胞核和mTORC1信号传递.
- 盖列-8的短同位体在骨再吸收中起着主要作用.
- LC-MS/MS确定了共享和短异型特异性相互作用蛋白质,包括细胞粘附和溶酶体蛋白质.
- 已确认与CLCN3,CLCN7,LAMP1和LAMP2的相互作用,这些相互作用定位在分泌囊泡中.
结论:
- 盖莱克-8在调节骨质细胞活动方面具有直接作用.
- 短的加勒-8异型主要是造成这些影响的原因.
- 加勒-8与关键蛋白质相互作用,这些蛋白质参与骨质细胞功能和囊泡运输.
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