An intelligent insulin delivery system is highly desirable for diabetes management. Herein, we developed a novel glucose-responsive multivesicular liposome (MVL) for self-regulated insulin delivery using the double emulsion method. Glucose-responsive MVLs could effectively regulate insulin release in response to fluctuating glucose concentrations in vitro. Notably, in situ released glucose oxidase catalyzed glucose enrichment on the MVL surface, based on the combination of (3-fluoro-4-((octyloxy)carbonyl)phenyl)boronic acid and glucose. The outer MVL membrane was destroyed when triggered by the local acidic and H2O2-enriched microenvironment induced by glucose oxidase catalysis in situ, followed by the further release of entrapped insulin. Moreover, the Alizarin red probe and molecular docking were used to clarify the glucose-responsive mechanism of MVLs. Utilizing chemically induced type 1 diabetic rats, we demonstrated that the glucose-responsive MVLs could effectively regulate blood glucose levels within a normal range. Our findings suggest that glucose-responsive MVLs with good biocompatibility may have promising applications in diabetes treatment.
一种智能胰岛素输送系统对于糖尿病管理非常理想。在这里,我们利用双乳化方法开发了一种新型的葡萄糖响应性多囊脂质体(MVL),用于自调节胰岛素输送。葡萄糖响应性MVL可以有效地调节体外胰岛素释放,以响应波动的葡萄糖浓度。值得注意的是,在MVL表面释放的葡萄糖氧化酶催化了葡萄糖的富集,基于(3-氟-4-((辛氧基)羰基)苯基)硼酸和葡萄糖的结合。当受到葡萄糖氧化酶原位催化引起的局部酸性和富含H2O2的微环境刺激时,外部MVL膜被破坏,随后释放出困住的胰岛素。此外,使用茜素红探针和分子对接来阐明MVL的葡萄糖响应机制。通过化学诱导的1型糖尿病大鼠,我们证明了葡萄糖响应性MVL可以有效地调节血糖水平保持在正常范围内。我们的研究结果表明,具有良好生物相容性的葡萄糖响应性MVL可能在糖尿病治疗中具有很好的应用前景。