胰島素pH敏感接枝共聚物囊泡的制備
[Abstract]:Objective To synthesize vitamin E-succinyl-N '-succinyl-1-polylysine (TOS-SA-PLL) as carrier material and to prepare p-H-sensitive graft copolymer vesicles. Methods The structure of the graft copolymer TOS-SA-PLL was characterized by nuclear magnetic resonance scanning and infrared spectroscopy. The degree of substitution of the graft copolymer was determined by means of 2,4,6-trinitrobenzene sulfonic acid. The particle size, polydispersivity and Zeta potential of the vesicle were determined by dynamic light scattering method. The encapsulation rate and the drug-carrying amount of the vesicles and the in vitro release behavior of the drug-loaded vesicles under different p-H conditions were determined by ultrafiltration. Results The average particle size of the vesicle formed by the self-assembly of the graft copolymer was 165.7-232.3 nm, the Zeta potential was-32.2--20.1 m V, the encapsulation rate of the carrier-loaded copolymer vesicle was up to 70.15%, and the drug-carrying amount (w) was 6.55%. In vitro release results show that the release behavior of the graft copolymer vesicles has a characteristic of p-H sensitivity. Conclusion The TOS-SA-PLL graft copolymer vesicle has the characteristics of p-H sensitivity, which is a carrier of the water-soluble biological macromolecular drug, and has a good application prospect in the field of gastrointestinal transmission.
【作者單位】: 沈陽藥科大學(xué)藥學(xué)院;沈陽藥科大學(xué)生命科學(xué)與生物制藥學(xué)院;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(31170967)
【分類號(hào)】:R943
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