کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7866532 | 1509136 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Porous chitosan microspheres containing zinc ion for enhanced thrombosis and hemostasis
ترجمه فارسی عنوان
میکروسپورهای کیتوزان متخلخل حاوی یون روی برای ترومبوز و هتروزاست
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کلمات کلیدی
کیتوزان، آلژینات روی، میکروسپرس، هموستات،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
چکیده انگلیسی
Quick hemostats for non-lethal massive traumatic bleeding in battlefield and civilian accidents are important for reducing mortality and medical costs. Chitosan (CS) has been widely used as a clinic hemostat. To enhance its hemostatic efficiency, Zn2 + in the form of zinc alginate (ZnAlg) was introduced to CS to make porous CS@ZnAlg microspheres with ZnAlg component on the surface. Such microspheres were prepared by successive steps of micro-emulsion, polyelectrolyte adhesion, and thermally induced phase separation. Their structure and hemostatic performance were analyzed by SEM, FT-IR, XPS and a series of in vitro hemostatic experiments including thromboelastography analysis. The composite microspheres had an outer and internal interconnected porous structure. Their size, surface area, and water absorption ratio were ca. 70 μm, 48 m2/g, and 1850%, respectively. Compared to the neat chitosan microspheres, the CS@ZnAlg microspheres showed shorter onset of clot formation, much faster in vitro and in vivo whole blood clotting, bigger clot, less blood loss, and shorter hemostatic time in the rat liver laceration and tail amputation models. The synergetic hemostatic effects from (1) the electrostatic attraction between chitosan component and red blood cells, (2) the activation of coagulation factor XII by Zn2 + of zinc alginate component, and (3) physical blocking by microsphere matrix, contributed to the enhanced hemostatic performance of CS@ZnAlg microspheres.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 85, 1 April 2018, Pages 27-36
Journal: Materials Science and Engineering: C - Volume 85, 1 April 2018, Pages 27-36
نویسندگان
Meng Pan, Zonghao Tang, Jianbing Tu, Zhengchao Wang, Qinhui Chen, Rongdong Xiao, Haiqing Liu,