کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10533702 961890 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In vitro release of organophosphorus acid anhydrolase from functionalized mesoporous silica against nerve agents
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
In vitro release of organophosphorus acid anhydrolase from functionalized mesoporous silica against nerve agents
چکیده انگلیسی
We report here that under different physiological conditions, biomolecular drugs can be stockpiled in a nanoporous support and afterward can be instantly released when needed for acute responses, and the biomolecular drug molecules can also be gradually released from the nanoporous support over a long time for a complete recovery. Organophosphorus acid anhydrolase (OPAA) was spontaneously and largely entrapped in functionalized mesoporous silica (FMS) due to the dominant electrostatic interaction. The OPAA-FMS composite exhibited a burst release in a pH 9.0 NaHCO3-Na2CO3 buffer system and a gradual release in pH 7.4 simulated body fluid. The binding of OPAA to NH2-FMS can result in less tyrosinyl and tryptophanyl exposure OPAA molecules to aqueous environment. The bound OPAA in FMS displayed lower activity than the free OPAA in solution prior to the enzyme entrapment. However, the released enzyme maintained the native conformational structure and the same high enzymatic activity as that prior to the enzyme entrapment. The in vitro results in the rabbit serum demonstrate that both OPAA-FMS and the released OPAA may be used as a medical countermeasure against the organophosphorus nerve agents.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytical Biochemistry - Volume 421, Issue 2, 15 February 2012, Pages 477-481
نویسندگان
, , , , ,