糖因素:树突性酸糖体表现的胰岛素,显示出长时间的降血糖活性
Masaaki Sato1, Tetsuya Furuike, Reiko Sadamoto
1Division of Biological Sciences, Graduate School of Science, Frontier Research Center for Post-Genomic Science and Technology, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan.
Journal of the American Chemical Society
|October 28, 2004
概括
使用alpha2,6-sialyltransferase (alpha2,6-SiaT) 和转谷氨酸酶 (TGase) 延长胰岛素的酸修饰在高血糖小鼠中降低葡萄糖的作用. 三氧化甘氨酸显示出葡萄糖水平恢复的显著延迟.
科学领域:
- 生物化学 生物化学
- 葡萄糖生物学 葡萄糖生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 胰岛素治疗对于糖尿病管理至关重要.
- 提高胰岛素的药理动力学特征可以改善血糖控制.
- 已知酸残留物会影响蛋白质半衰期和生物活性.
研究的目的:
- 用于用化寡糖化合物对突变胰岛素进行酶性修饰.
- 研究化对胰岛素降血糖功效和持续时间的影响.
- 评估糖因素素作为长效治疗剂的潜力.
主要方法:
- 突变胰岛素被使用转谷氨酸酶 (TGase) 修改,以附加可访问的谷氨酸残留物.
- 用α2,6-sialyltransferase (alpha2,6-SiaT) 来对改性胰岛素上糖链进行化.
- 化胰岛素变体Sia2,6-di-LacNAc-Ins ((B-F1Q) 和Sia2,6-tri-LacNAc-Ins ((B-F1Q) 被给予高血糖小鼠.
主要成果:
- 与原生胰岛素或乳糖修饰胰岛素相比,二氧化和三氧化甘油素都表现出长时间的降血糖效果.
- 酸的存在被确定为实现延长治疗持续时间的关键因素.
- Sia2,6-tri-LacNAc-Ins ((B-F1Q) 在高血糖小鼠中显著延迟了葡萄糖水平的正常化.
结论:
- 胰岛素的酶性化可以产生长效的甘氨酸素变体.
- 酸残留在扩大胰岛素的药理动力学和药理动力学特性方面发挥着至关重要的作用.
- 这些发现表明,开发改善的胰岛素配方治疗糖尿病是一种有希望的策略.
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