Glipizide

Bhairam M, et al. Materials Today: Proceedings, 2023, 83, 59-68.

This study demonstrates the experimental application of glipizide in a matrix-type transdermal drug delivery system co-formulated with losartan potassium. Glipizide was incorporated into polymeric matrices composed of HPMC, ethyl cellulose, or Eudragit L100, combined with PVP, using a solvent casting and evaporation technique. Standard calibration curves were established by dissolving glipizide in phosphate buffer (pH 7.4), followed by UV-Vis spectrophotometric analysis. The absorption maximum of glipizide was determined at 275 nm, enabling quantitative in-vitro release and permeation studies. Drug-polymer dispersions were prepared in dimethylformamide, plasticized with dibutyl phthalate, and cast onto a polyvinyl alcohol backing membrane. The resulting patches were evaluated for physicochemical properties, in-vitro drug release, and skin permeation, confirming glipizide's suitability for controlled transdermal delivery in combination therapy.

Tandon S, et al. Biochemical and Biophysical Research Communications, 2023, 645, 88-96.

This case study highlights the experimental use of glipizide as a pharmacological modulator of insulin signalling in Drosophila models of poly(Q)-mediated neurodegeneration. Glipizide was administered orally by incorporating defined concentrations of the drug into standard fly food, using DMSO-based stock solutions. Transgenic Drosophila lines expressing expanded poly(Q) proteins were reared under controlled conditions, allowing systematic evaluation of drug effects in vivo. Preliminary dose screening was performed by monitoring poly(Q) aggregation intensity in larval eye discs. Glipizide treatment resulted in reduced aggregate formation, attenuation of neurodegeneration, and restoration of histone acetylation levels, indicating improved chromatin architecture. These results experimentally establish glipizide as a functional tool for probing insulin-dependent neuroprotective mechanisms and support its potential repurposing for poly(Q) disorder research.

Kumar V, et al. Saudi Pharmaceutical Journal, 2024, 32, 102046.

Glipizide was experimentally applied as a model hydrophobic antidiabetic drug to evaluate the drug-loading capability of a lauric acid-conjugated Pluronic F127 (LAF127) block copolymer. The copolymer was synthesized via esterification and subsequently employed to prepare glipizide-loaded nano-micelles using a modified thin-film hydration technique. LAF127 was dissolved in methylene chloride, while glipizide was separately dissolved in methanol. Under high-speed homogenization, the glipizide solution was added dropwise to the polymer solution, followed by solvent evaporation under reduced pressure to form a thin polymeric film. Hydration with deionized water under controlled stirring enabled self-assembly into nano-micelles. The resulting glipizide-loaded micelles exhibited a mean particle size of approximately 341 nm with a low polydispersity index (<0.2), indicating a uniform colloidal system. This study demonstrates glipizide's suitability for assessing polymeric micelle-based drug delivery platforms.

Qais FA, et al. International Journal of Biological Macromolecules, 2024, 267, 131573.

Glipizide was utilized as a small-molecule probe to investigate drug-DNA interactions using complementary biophysical and computational approaches. A stock solution of glipizide was prepared in DMSO, while calf thymus DNA was dissolved in Tris-HCl buffer and rigorously characterized for purity using UV absorbance ratios. Interaction studies were conducted through UV-visible absorption spectroscopy and fluorescence quenching assays to confirm complex formation and estimate binding affinity. Thermodynamic parameters were derived from temperature-dependent measurements, revealing an entropically driven and energetically favorable interaction. DNA thermal melting, viscosity analysis, and dye displacement experiments (using ethidium bromide, Hoechst 33258, and acridine orange) consistently indicated minor groove binding. Molecular dynamics simulations under physiological conditions further confirmed the stability of the glipizide-DNA complex, predominantly stabilized by hydrogen bonding. This case highlights glipizide's experimental applicability in mechanistic studies of drug-nucleic acid interactions.