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Biospinning by silkworms: silk fiber matrices for tissue engineering applications
Biman B Mandal1, Subhas C Kundu
1Department of Biotechnology, Indian Institute of Technology, Kharagpur, India.
Acta Biomaterialia
|September 1, 2009
Summary
Researchers developed natural silk matrices from Antheraea mylitta silkworms for tissue engineering. These biocompatible, macroporous structures support cell growth, offering a promising alternative biomaterial.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Textile Science
Background:
- The biospinning mechanism of natural silk fibers remains largely uncharacterized.
- Antheraea mylitta, a wild tropical tasar silkworm, offers a source of unique silk fibroin.
- Developing novel biomaterials is crucial for advancing tissue engineering applications.
Purpose of the Study:
- To investigate the conformational transitions of silk fibroin during biospinning.
- To characterize biospun silk matrices derived from Antheraea mylitta.
- To evaluate the potential of these silk matrices as substrates for cell adherence and proliferation in tissue engineering.
Main Methods:
- Biospinning of Antheraea mylitta silk fibers into aligned, mixed, or random patterns.
- Morphological and functional characterization (fiber diameter, crystallinity, mechanical strength).
- In vitro biocompatibility assessment using feline fibroblast cells, including viability and proliferation assays.
Main Results:
- Biospun silk fibers exhibited enhanced stability against protease treatment compared to native fibroin.
- The resulting macroporous, 3D silk matrices demonstrated good mechanical properties.
- Fluorescence and confocal microscopy confirmed normal cell attachment, spreading, and proliferation on the silk matrices, indicating biocompatibility.
Conclusions:
- Antheraea mylitta silk fibroin can be processed into stable, biocompatible matrices.
- These biospun silk matrices serve as effective natural substrata for cell growth.
- The findings support the use of these silk matrices as inexpensive, alternative biomaterials for tissue engineering.
