کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10229963 593 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recombinant spider silk particles as drug delivery vehicles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Recombinant spider silk particles as drug delivery vehicles
چکیده انگلیسی
Spider silk has been in the focus of research mainly due to the superior mechanical characteristics of silk fibers. However, it has been previously shown that spider silk proteins can also adopt other morphologies such as submicroparticles. This study examines the applicability of such particles as drug carriers. Particle characterization revealed that particles made of the engineered spider silk protein eADF4(C16) are colloidally stable in solution. Here, it is shown that small molecules with positive net-charge can diffuse into the negatively charged spider silk protein matrix driven by electrostatic interactions. The loading efficiencies correlate with the distribution coefficient (logD) of small molecules of weak alkaline nature. Interestingly, constant release rates can be realized for a period of two weeks at physiological conditions in vitro, with accelerated release rates within acidic environments. Enzymatic degradation studies of eADF4(C16) particles indicated that the silk proteins degrade slowly and the particles decrease in size. Along with their all-aqueous and easy preparation, drug loaded eADF4(C16) particles provide a high potential for diverse applications in which controlled release from biodegradable carriers is desired.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 32, Issue 8, March 2011, Pages 2233-2240
نویسندگان
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