کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
878169 911066 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of insulin nanoparticles using chitosan and its quaternized derivatives
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
Preparation and characterization of insulin nanoparticles using chitosan and its quaternized derivatives
چکیده انگلیسی

Insulin (INS), like other peptides, has low therapeutic activity when administered orally due to degradation by proteolytic enzymes. Polymeric nanoparticles have been introduced as a useful carrier for peptide oral delivery, because they can protect these compounds from degradation. The objective of the present study is to develop an INS nanoparticulate system by using chitosan (CS), triethylchitosan (TEC), and dimethyl-ethylchitosan (DMEC, a new quaternized derivative of CS). INS-polymer nanoparticles were prepared by the polyelectrolyte complexation method. The physicochemical properties of the nanoparticles including particle size distribution, zeta potential, and polydispersity index were determined by using dynamic light scattering technique. Transmission electron microscopy was also used to observe the morphology of the nanoparticles. The amount of INS loaded into the nanoparticles was determined by measuring the association efficiency and also the content of INS in the nanoparticles. In vitro release studies showed a relatively small burst effect at the beginning and then a sustained release characteristic for 5 hours.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nanomedicine: Nanotechnology, Biology and Medicine - Volume 4, Issue 2, June 2008, Pages 115–120
نویسندگان
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