title: The anticoagulant ability of ferulic acid and its applications for improving the blood compatibility of silk fibroin.
abstract: The hemocompatibility of silk fibroin (SF) was improved with ferulic acid (FA) by graft polymerization. Ferulic acid is an active ingredient of many Chinese herbal medicines, such as Chuanxiong (Rhizoma ligustici wallichii), Danggui (Angelica sinensis) and Awei (Asafoetida giantfennel), which have been used to treat cardiovascular diseases by Chinese physicians for thousands of years. The inhibitory functions of FA on blood coagulation and erythrocyte agglutination were first characterized by a Lee-White test tube method and a micropipette technique, respectively. Then, FA was immobilized on SF by graft polymerization and the surface composition of modified SF was characterized by attenuated total reflectance Fourier-transform infrared (ATR-FTIR), x-ray photoelectron spectroscopy (XPS) and optical microscopy. The anticoagulant activity of modified SF was assessed, respectively, by in vitro clotting time measurements on a photo-optical clot detection instrument and with the Lee-White test tube method. The test results indicated that in comparison to untreated SF, the anticoagulant activity of modified SF has been improved significantly. Moreover, the SF surface composition is altered by FA but its beta-sheet conformation is not disturbed.
authors.affiliation: School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China. wangsongbit@hotmail.com
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Gao
authors.forename: Xiaomeng
authors.initials: X
authors.lastname: Chen
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Lian
authors.forename: Hesun
authors.initials: H
authors.lastname: Zhu
authors.forename: Jun
authors.initials: J
authors.lastname: Zheng
authors.forename: Lizhong
authors.initials: L
authors.lastname: Sun
mesh_terms: D000818:Animals; D000925:Anticoagulants / Q000494:pharmacology*; D001777:Blood Coagulation / Q000187:drug effects*; D003373:Coumaric Acids / Q000737:chemistry*; D004912:Erythrocytes / Q000187:drug effects; D005349:Fibroins / Q000737:chemistry*; D006801:Humans; D008516:Medicine, Chinese Traditional; D008956:Models, Chemical; D010314:Partial Thromboplastin Time; D011817:Rabbits; D047011:Silk; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties
chemical_list: D000925:Anticoagulants; D003373:Coumaric Acids; D047011:Silk; D005349:Fibroins; C004999:ferulic acid