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Glucagon-like Receptor Agonists01:24

Glucagon-like Receptor Agonists

Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...

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Updated: Jun 13, 2026

Metabolic Glycoengineering of Sialic Acid Using N-acyl-modified Mannosamines
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针对发育阶段的DNA Aptamer-Guided Glycomimetics 用于控制干细胞分化

Sean C Purcell, Matthew R Naticchia, Julianna L Follmar

    Journal of the American Chemical Society
    |July 8, 2025
    PubMed
    概括

    研究人员开发了一种新的肝素硫酸仿真剂,通过性酸酶选择性向胚胎干细胞. 这种糖仿药增强了生长因子信号传递,促进了神经区分的潜在治疗应用.

    科学领域:

    • 生物化学
    • 发育生物学
    • 生物材料科学

    背景情况:

    • 在干细胞发育过程中调节生长因子活性.
    • 合成硫酸肝素仿制剂提供了一种控制干细胞信号和分化的策略.
    • 目前的干细胞葡萄糖工程方法缺乏特异性,需要基因改造.

    研究的目的:

    • 开发一种针对胚胎干细胞的特殊硫酸肝素仿制剂.
    • 研究增生因子结合在干细胞分化中的作用.
    • 探索向葡萄糖工程的治疗潜力.

    主要方法:

    • 合成了一种酸硫酸模拟剂, 包含酸酶向的DNA合体.
    • 采用DNA吸收剂对模仿胚胎干细胞表面进行选择性向.
    • 评估了纤维细胞生长因子2 (FGF2) 的招募和基激活蛋白激酶 (MAPK) 途径的激活.

    主要成果:

    • 这种DNA合剂能够选择性地向模仿胚胎干细胞的硫酸肝素.
    • 增强的FGF2招募激活了MAPK信号.
    • 有针对性的糖相对应应用促进了干细胞的神经分化.

    结论:

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    • 成功开发了一种新的干细胞特异性肝素硫酸仿真剂.
    • 有针对性的糖相学修饰可以有效调节干细胞信号和分化.
    • 这种方法有望提高干细胞的治疗潜力.