title: Engineered silk fibroin protein 3D matrices for in vitro tumor model.
abstract: 3D in vitro model systems that are able to mimic the in vivo microenvironment are now highly sought after in cancer research. Antheraea mylitta silk fibroin protein matrices were investigated as potential biomaterial for in vitro tumor modeling. We compared the characteristics of MDA-MB-231 cells on A. mylitta, Bombyx mori silk matrices, Matrigel, and tissue culture plates. The attachment and morphology of the MDA-MB-231 cell line on A. mylitta silk matrices was found to be better than on B. mori matrices and comparable to Matrigel and tissue culture plates. The cells grown in all 3D cultures showed more MMP-9 activity, indicating a more invasive potential. In comparison to B. mori fibroin, A. mylitta fibroin not only provided better cell adhesion, but also improved cell viability and proliferation. Yield coefficient of glucose consumed to lactate produced by cells on 3D A. mylitta fibroin was found to be similar to that of cancer cells in vivo. LNCaP prostate cancer cells were also cultured on 3D A. mylitta fibroin and they grew as clumps in long term culture. The results indicate that A. mylitta fibroin scaffold can provide an easily manipulated microenvironment system to investigate individual factors such as growth factors and signaling peptides, as well as evaluation of anticancer drugs.
authors.affiliation: Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India.
authors.forename: Sarmistha
authors.initials: S
authors.lastname: Talukdar
authors.forename: Mahitosh
authors.initials: M
authors.lastname: Mandal
authors.forename: Dietmar W
authors.initials: DW
authors.lastname: Hutmacher
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Russell
authors.forename: Carolina
authors.initials: C
authors.lastname: Soekmadji
authors.forename: Subhas C
authors.initials: SC
authors.lastname: Kundu
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002448:Cell Adhesion / Q000502:physiology; D018929:Cell Culture Techniques / Q000295:instrumentation* / Q000379:methods; D045744:Cell Line, Tumor; D003094:Collagen / Q000737:chemistry; D004338:Drug Combinations; D005349:Fibroins / Q000737:chemistry*; D005947:Glucose / Q000378:metabolism; D006801:Humans; D019344:Lactic Acid / Q000378:metabolism; D007797:Laminin / Q000737:chemistry; D008422:Materials Testing; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism; D008954:Models, Biological; D009369:Neoplasms / Q000473:pathology*; D011509:Proteoglycans / Q000737:chemistry; D023822:Tissue Engineering / Q000379:methods*; D054457:Tissue Scaffolds / Q000737:chemistry*; D059016:Tumor Microenvironment
chemical_list: D001672:Biocompatible Materials; D004338:Drug Combinations; D007797:Laminin; D011509:Proteoglycans; C059485:matrigel; D019344:Lactic Acid; D003094:Collagen; D005349:Fibroins; D020780:Matrix Metalloproteinase 9; D005947:Glucose