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A Moldable Putty Containing Silk Fibroin Yolk Shell Particles for Improved Hemostasis and Bone Repair
Author(s) -
Saran Kushagra,
Shi Pujiang,
Ranjan Shashi,
Goh James C. H.,
Zhang Yong
Publication year - 2015
Publication title -
advanced healthcare materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.288
H-Index - 90
eISSN - 2192-2659
pISSN - 2192-2640
DOI - 10.1002/adhm.201400411
Subject(s) - putty , fibroin , biomedical engineering , hemostasis , materials science , c2c12 , alkaline phosphatase , thrombin , chemistry , bone healing , silk , anatomy , nanotechnology , composite material , surgery , platelet , medicine , biochemistry , immunology , myogenesis , in vitro , enzyme , coating
During minimally invasive orthopedic surgeries, surgical intervention is required at two stages; to attain hemostasis and subsequently to implant the bone graft or its substitute. There is an apparent need for a material which can simultaneously control bone bleeding and provide support for bone repair. In this work, a moldable putty, which can be applied to bone defects (usually irregular in shape), was developed to address this need. It comprises of a hemostatic factor thrombin, osteoinductive “yolk‐shell” particles containing bone growth factor (BMP‐2), and an osteoconductive component hydroxyapatite. The yolk shell particles allowed controlled release of BMP‐2 and showed significantly enhanced osteogenic differentiation of C2C12 (mouse myoblast) cells as demonstrated by increased alkaline phosphatase (ALP) activity and relative gene expressions of osteogenic differentiation markers. These particles were assembled into a moldable putty by mixing them with hydroxyapatite and silk fibroin solution (binding agent) supplemented with thrombin. The putty showed non‐cytotoxicity, hemostatic ability, sustained release of BMP‐2 and induced increased mineralization in C2C12 cells. This putty, if applied to bone defects during surgeries, may help attain hemostasis and may enhance bone repair by providing sustained release of bone growth factors.