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Integration of metformin-loaded MIL-100(Fe) into hydrogel microneedles for prolonged regulation of blood glucose levels.
Biomedical Physics & Engineering Express 2024 April 27
The transdermal drug delivery based on microneedles (MNs) provides a suitable and painless self-administration for diabetic patients. In this work, the hydrogel-forming MNs were firstly fabricated using PVA and chitosan (CS) as matrix. A hypoglycemic drug, metformin (Met), had been loaded into MIL-100(Fe). Then, both of free Met and Met-loaded MIL-100(Fe) were integrated into hydrogel-forming MNs for regulation of BGLs on diabetic rats. After penetrated into the skin, the free Met could be firstly released from MNs. Due to the absorption of interstitial fluid and subsequent release of loaded Met from MIL-100(Fe), leading to a sustainable and long-term drug release behaviors. In vivo experiments performed on diabetic rat models yield a notable hypoglycemic effect and low risk of hypoglycemia. Therefore, MIL-100(Fe) microspheres loaded with Met have good mechanical properties, high drug loading capacity and significant hypoglycemic effect. It is expected to become a new type of transdermal microsphere drug delivery system.
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