Mandal Biman B, Kapoor Sonia, Kundu Subhas C
Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
Biomaterials. 2009 May;30(14):2826-36. doi: 10.1016/j.biomaterials.2009.01.040. Epub 2009 Feb 8.
The present study describes a semi-interpenetrating network hydrogel fabricated using silk fibroin/polyacrylamide for controlled drug delivery applications. Hydrogels were synthesized using varied ratios of silk fibroin/acrylamide mixtures crosslinked by N,N'-Methylenebisacrylamide. Fourier-Transform Infrared analysis was performed suggesting beta sheet transition of silk fibroin with hydrogels. Scanning electron microscopy revealed microporous surface with maximum pore size of 50+/-11 microm. Rheological properties along with swellability, degradation, sol fraction estimation, equilibrium water content and swelling kinetics were evaluated. Compressive strength of 241.9+/-5.5 kPa was observed suggesting mechanically stronger gels. MTT assay showed biocompatibility and absence of deleterious effects of hydrogel on cell viability and functionality. In vitro release studies using two model compounds i.e. trypan blue dye and FITC-inulin reveal their sustained release from the fabricated hydrogel constructs.
本研究描述了一种使用丝素蛋白/聚丙烯酰胺制备的半互穿网络水凝胶,用于可控药物递送应用。通过N,N'-亚甲基双丙烯酰胺交联不同比例的丝素蛋白/丙烯酰胺混合物来合成水凝胶。进行了傅里叶变换红外分析,表明丝素蛋白与水凝胶发生了β-折叠转变。扫描电子显微镜显示表面为微孔结构,最大孔径为50±11微米。评估了流变学性质以及溶胀性、降解、溶胶分数估计、平衡含水量和溶胀动力学。观察到抗压强度为241.9±5.5 kPa,表明凝胶具有更强的机械性能。MTT分析显示了生物相容性以及水凝胶对细胞活力和功能没有有害影响。使用两种模型化合物即台盼蓝染料和异硫氰酸荧光素标记的菊粉进行的体外释放研究表明,它们从制备的水凝胶构建体中持续释放。