Non-bioengineered silk gland fibroin protein: Characterization and evaluation of matrices for potential tissue engineering applications

被引:85
|
作者
Mandal, Biman B. [1 ]
Kundu, Subhas C. [1 ]
机构
[1] Indian Inst Technol, Dept Biotechnol, Kharagpur 721302, W Bengal, India
关键词
non-mulberry silk; gland fibroin; sodium dodecyl sulfate; cell culture;
D O I
10.1002/bit.21835
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The possibility of using wild non-mulberry silk protein as a biopolymer remains unexplored compared to domesticated mulberry silk protein. One of the main reasons for this was for not having any suitable method of extraction of silk protein fibroin from cocoons and silk glands. In this study non-bioengineered non-mulberry silk gland fibroin protein from tropical tasar silkworm Antheraca mylitta, is regenerated and characterized using 1% (w/v) sodium dodecyl sulfate (SDS). The new technique is important and unique because it uses a mild surfactant for fibroin dissolution and is advantageous over other previous reported techniques using chaotropic salts. Fabricated fibroin films are smooth as confirmed by atomic force microscopy. Circular dichroism spectrometry along with Fourier transformed infrared spectroscopy and X-ray diffraction reveal random coil/alpha-helix conformations in regenerated fibroin which transform to P-sheets, resulting in crystalline structure and protein insolubility through ethanol treatment. Differential scanning calorimetry shows an increase in glass transition (Tg) temperature and enhanced degradation temperature on alcohol treatment. Enhanced cell attachment and viability of AH927 feline fibroblasts were observed on fibroin matrices. Higher mechanical strength along with controllable water stability of regenerated gland fibroin films make non-mulberry Indian tropical tasar silk gland fibroin protein a promising biomaterial for tissue engineering applications.
引用
收藏
页码:1237 / 1250
页数:14
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