Abstract
Metformin hydrochloride (Metf) is a first-line oral drug for the treatment of type 2 diabetes and it is primarily absorbed in the small intestine. However, it degrades easily before reaching the intestine, so its use is limited. In order to solve this problem, the supramolecular nanoparticles were successfully constructed based on electrostatic interaction of cationic β-CD derivative (DPN-β-CD and anionic surfactant sodium dodecylbenzene sulfonate (SDBS). The nanoparticles were characterized by UV–visible absorption, X-ray diffraction, dynamic light scattering, transmission electron microscopy and zeta potential techniques. The average diameter of the obtained nanoparticles is 254 nm, the main structure is spherical, and they are uniformly distributed in solution with a zeta potential of − 9.04 mV. Subsequently, it was found that the obtained nanoparticles can be disassembled by increasing the pH and reassembled by reducing to the initial pH value. The SDBS/DPN-β-CD supramolecular nanoparticles can efficiently encapsulate model diabetes drug such as Metf. More importantly, the in vitro release at different physiological pH values of 2.0, 6.3 and 8.0 showed a controlled release of Metf from the system and the release rate of Metf is lower in a simulated gastric environment (pH 2.0), while the release is higher in a simulated intestinal environment (pH 8.0). This system helps to reduce the stimulation of Metf to the stomach and improve its absorption rate in the small intestine. Therefore, the anti-diabetic small intestine specific drug delivery system is of potential importance in the treatment of diabetes.
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Data availability statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This work was supported by the National Natural Science Foundations (Nos. 21961046, 21362046, and 21062030), which are gratefully acknowledged.
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Teng, J., Chen, S., Zhang, J. et al. pH-responsive nanoparticles based on sodium dodecylbenzene sulfonate and polyamine-modified cyclodextrins for controlled release of metformin hydrochloride. Iran Polym J 31, 1069–1078 (2022). https://doi.org/10.1007/s13726-022-01060-w
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DOI: https://doi.org/10.1007/s13726-022-01060-w