posted on 2019-07-12, 00:00authored byXingang Zhang, Gu Cheng, Xin Xing, Jiangchao Liu, Yuet Cheng, Tianyu Ye, Qun Wang, Xiangheng Xiao, Zubing Li, Hongbing Deng
The
treatment of massive bone defects is still a significant challenge
for orthopedists. Here we have engineered synthetic porous AuPd alloy
nanoparticles (pAuPds) as a hyperthermia agent for in situ bone regeneration
through photothermal therapy (PTT). After being swallowed by cells,
pAuPds produced a mild localized heat (MLH) (40–43 °C)
under the irradiation of a near-infrared laser, which can greatly
accelerate cell proliferation and bone regeneration. Almost 97% of
the cranial defect area (8 mm in diameter) was covered by the newly
formed bone after 6 weeks of PTT. RNA sequencing analysis was used
to obtain insight into the molecular mechanism of the MLH on cell
proliferation and bone formation. These results demonstrated that
the Wnt signaling pathway was involved in the MLH. This Letter provides
a unique strategy with mild heat stimulation and high efficiency for
in situ bone regeneration.