Physical and chemical characterization insulin-loaded chitosan-TPP nanoparticles

被引：65
|
作者：
Azevedo, J. R. [1 ]
Sizilio, R. H. [1 ]
Brito, M. B. [1 ]
Costa, A. M. B. [1 ]
Serafini, M. R. [1 ]
Araujo, A. A. S. [1 ]
Santos, M. R. V. [1 ]
Lira, A. A. M. [1 ]
Nunes, R. S. [1 ]
机构：
[1] Univ Fed Sergipe, Dept Fisiol, BR-49100000 Sao Cristovao, Sergipe, Brazil
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2011年 / 106卷 / 03期
关键词：
Nanoparticles; Chitosan; Insulin; Thermal analysis; FTIR; ABSORPTION; POLYSACCHARIDE; STABILITY; PROTEINS;
D O I：
10.1007/s10973-011-1429-5
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The purpose of this study was to develop and characterize insulin nanoparticles systems using chitosan. Insulin-loaded nanoparticles were prepared by ionic gelation of chitosan with tripolyphosphate anions (TPP). The interactions between insulin and chitosan were evaluated by differential scanning calorimetry (DSC), thermogravimetry/derivative thermogravimetry (TG/DTG), and Fourier-transform infrared (FTIR) spectroscopy. Besides, particle size distribution, polydispersity index (PDI), zeta potential, and association efficiency (AE%) of the nanoparticles were evaluated. In general, inert nanoparticles and insulin-loaded nanoparticles showed an average size of 260.56 nm (PDI 0.502) and 312.80 nm (PDI 0.481), respectively. Both nanoparticles showed positive charge, but after insulin incorporation the zeta potential was reduced, evidencing its incorporation. Nanoparticles obtained also showed AE% around 70%, measured by high-performance liquid chromatography (HPLC). The results of FTIR, DSC, and TG/DTG corroborated the data presented suggesting that insulin was successfully encapsulated. However, drug incorporation seems to be related not only to electrostatic interactions, but also to physical process and/or adsorption phenomena.
引用
收藏
页码：685 / 689
页数：5
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