在肝细胞癌中使用具有稳定的同位素标记的组织蛋白质学来全面描述差异性糖化
Shanshan Qin1, Ke Gao2, Zhixin Tian3
1School of Chemical Science & Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, China.
Analytical and bioanalytical chemistry
|June 26, 2024
概括
糖化,一种与肝细胞癌 (HCC) 相关的蛋白质修饰,在HCC组织中具有特征. 研究人员确定了数千个早期和高级的糖化位点,揭示了与HCC进展和潜在疗法相关的差异性糖化模式.
科学领域:
- 生物化学 生物化学
- 蛋白质组学是指蛋白质组学.
- 在瘤学瘤学.
背景情况:
- 糖化是一种非酶的蛋白质由糖的修饰.
- 先进的糖化终产品 (AGEs) 的积累与肝细胞癌 (HCC) 有关.
研究的目的:
- 在HCC组织中表征差异性蛋白质糖化.
- 在HCC中识别早期和晚期的糖化位点及其相关蛋白质.
主要方法:
- 使用稳定同位素标记的组织蛋白质组学.
- 酸亲和色谱 (BAC) 用于早期的糖化丰富.
- 对于AGE修饰的基本逆相分离.
主要成果:
- 在1484种蛋白质中确定了3717种早期和1137种先进的糖化,FDR<1%.
- 发现了155个由早期和先进的糖化产品修改的地点.
- 在HCC组织中量化了5种早期和7种先进的糖化的差异表达;已知80%的相应蛋白质在HCC中失调.
结论:
- 这项研究提供了在HCC中差异性蛋白质糖化的综合性特征.
- 这些发现加深了对糖化在HCC病变发生过程中的作用的理解.
- 鉴定出差异性糖化蛋白可能为HCC提供新的治疗点.
相关概念视频
Protein Glycosylation
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
Glycosylation occurs in...
Proteoglycans
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,...


