Accelerated Bone Regeneration by Two-Photon Photoactivated Carbon Nitride Nanosheets.

Citation data:

ACS nano, ISSN: 1936-086X, Vol: 11, Issue: 1, Page: 742-751

Publication Year:
2017
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21173
PMID:
28033461
DOI:
10.1021/acsnano.6b07138
Author(s):
Tiwari, Jitendra N.; Seo, Young Kyo; Yoon, Taeseung; Lee, Wang Geun; Cho, Woo Jong; Yousuf, Muhammad; Harzandi, Ahmad M.; Kang, Du-Seok; Kim, Kwang-Youn; Suh, Pann-Ghill; Kim, Kwang S. Show More Hide
Publisher(s):
American Chemical Society (ACS); AMER CHEMICAL SOC
Tags:
Materials Science; Engineering; Physics and Astronomy; bone regeneration; carbon nitride nanosheets; mesenchymal stem cells; osteogenic differentiation; proliferation; two-photon materials
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article description
Human bone marrow-derived mesenchymal stem cells (hBMSCs) present promising opportunities for therapeutic medicine. Carbon derivatives showed only marginal enhancement in stem cell differentiation toward bone formation. Here we report that red-light absorbing carbon nitride (CN) sheets lead to remarkable proliferation and osteogenic differentiation by runt-related transcription factor 2 (Runx2) activation, a key transcription factor associated with osteoblast differentiation. Accordingly, highly effective hBMSCs-driven mice bone regeneration under red light is achieved (91% recovery after 4 weeks compared to 36% recovery in the standard control group in phosphate-buffered saline without red light). This fast bone regeneration is attributed to the deep penetration strength of red light into cellular membranes via tissue and the resulting efficient cell stimulation by enhanced photocurrent upon two-photon excitation of CN sheets near cells. Given that the photoinduced charge transfer can increase cytosolic Ca accumulation, this increase would promote nucleotide synthesis and cellular proliferation/differentiation. The cell stimulation enhances hBMSC differentiation toward bone formation, demonstrating the therapeutic potential of near-infrared two-photon absorption of CN sheets in bone regeneration and fracture healing.