结构和特定位点的N-甘氨酸变化定义了小鼠胸膜衰老的糖蛋白组景观
Zhida Zhang1, Ke Hou1, Mengyu Liu1
1Laboratory for Disease Glycoproteomics, College of Life Sciences, Northwest University, Xi'an, 710069, PR China.
Carbohydrate polymers
|October 21, 2025
概括
胸膜衰老涉及N-甘氨酸的显著变化,影响免疫功能. 这项研究绘制了这些糖化变化的地图,提供了对免疫衰老和与年龄有关的疾病的见解.
科学领域:
- 免疫学 免疫学 免疫学
- 葡萄糖科学 (Glycoscience) 是一种科学.
- 衰老研究研究 衰老研究
背景情况:
- 胸膜衰老是免疫衰老和整体生理衰退的关键因素.
- 驱动胸膜衰老的分子机制,特别是糖化变化,尚未完全理解.
研究的目的:
- 为了对老老鼠胸腺进行高分辨率的葡萄糖蛋白质组分析.
- 为了确定特定位点N-甘氨酸的与年龄相关的变化及其与蛋白质表达的关系.
- 阐明糖基化改造在胸膜衰老和免疫功能中的作用.
主要方法:
- 高分辨率的老老鼠胸腺糖蛋白组分析.
- 与定量全球和基蛋白质组数据集的整合.
- 特定部位的N-甘氨酸的识别和表征,区分蛋白质表达变化和真正的糖化变化.
主要成果:
- 鉴定了484个上调和866个下调的特定位点N-甘氨酸,独立于蛋白质表达变化.
- 揭示了四个主要的与年龄相关的甘氨酸模式:降低了橄甘,增加了LacdiNAc (与MGL相关),改变了Neu5Ac/Neu5Gc平衡,并通过核心-化升调了分割N-甘氨酸.
- 证明与衰老相关的糖化转型是由改变的糖化酶驱动的,并调节免疫/衰老信号通路.
结论:
- 糖化在胸膜衰老中起着关键的功能作用.
- 建立了一个高分辨率的分子地图的糖基化动态在老龄化的胸腺.
- 这张地图是研究免疫衰退和与年龄有关的疾病的资源.
更多相关视频
14:57Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
Published on: March 23, 2011
95.1K
11:25Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
Published on: October 4, 2017
7.0K
相关概念视频
01:19The Effect of Aging on Tissues
3.3K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
3.3K
01:05Proteoglycans
4.7K
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
4.7K