Li Yang
,
Liu Xuqiang
,
Tan Lili
,
Ren Ling
,
Wan Peng
,
Hao Yongqiang
,
Qu Xinhua
,
Yang Ke
,
Dai Kerong
材料科学技术（英文）
doi:10.1016/j.jmst.2016.07.013
Implant-associated infection remains a difficult medical problem in orthopedic surgery. Therefore, the development of multifunctional bone implants for treating infection and regenerating lost bone tissue, which may be a result of infection, is important. In the present study, we report the fabrication of enoxacin-loaded poly (lactic-co-glycolic acid) (PLGA) coating on porous magnesium scaffold (Enox-PLGA-Mg) which combine the favorable properties of magnesium, the antibacterial property and the effect of inhibition of osteoclastic bone resorption of enoxacin. The drug loaded PLGA coating of Mg scaffold enables higher drug loading efficiency (52%-56%) than non-coating enoxacin loaded Mg scaffold (Enox-Mg) (4%-5%). Enox-PLGA-Mg exhibits sustained drug release for more than 14 days, and this controlled release of enoxacin significantly inhibits bacterial adhesion and prevented biofilm formation by Staphylococcus epidermidis (ATCC35984) and Staphylococcus aureus (ATCC25923). Biocompatibility tests with Balb/c mouse embryo fibroblasts (Balb/c 3T3 cells) indicate that PLGA-Mg has better biocompatibility than Mg. Finally, we also demonstrate that Enox-PLGA-Mg extract potently inhibited osteoclast formation in vitro. Therefore, Enox-PLGA-Mg has the potential to be used as a multifunctional controlled drug delivery system bone scaffolds to prevent and/or treat orthopedic peri-implant infections.
关键词:
Porous magnesium scaffold
,
Poly (lactic-co-glycolic acid) (PLGA)
,
Drug delivery system
,
Bactericidal activity
,
Enoxacin
,
Osteolysis
Jin Shujing
,
Ren Ling
,
Yang Ke
材料科学技术（英文）
doi:10.1016/j.jmst.2016.06.022
Although being an essential trace element required for human body health, Cu has long been seriously considered toxic when its amount exceeds certain limitation, which significantly limited the wide application of Cu in biomaterials. However, more and more bio-functions and benefits of Cu were found and confirmed, attracting the attention from biomaterials researchers in recent years. People have tried to immobilize Cu into biomaterials by various ways, in order to develop novel bio-functional Cu containing biomaterials with better bio-adaptions, and several different bio-functions of them have been demonstrated. This paper makes a review of the development of novel bio-functional Cu containing biomaterials, and focuses on their unique roles in enhancing bio-adaption of biomedical materials, including antibacterial performance, stimulating angiogenesis, promoting osteogenesis and inhibition of in-stent restenosis, aiming at proposing a prospective development direction for biomedical materials with better bio-adaptions.
关键词:
Biomaterials
,
Cu
,
Antibacterial
,
Angiogenesis
,
Osteogenesis
,
In-stent restenosis
