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Sung Choi

Sung Choi

The Catholic University of Korea, Korea

Title: Nanodiamond Clusters Decorated with Folic Acid for Photothermal Tumor Therapy

Biography

Biography: Sung Choi

Abstract

Statement of the Problem: Photothermal tumor therapy (PTT) have attracted considerable attention as minimally invasive therapeutic techniques as they have a typical tissue penetration of several centimeters in biological tissues. Nanodiamonds (NDs) have a truncated octahedral composition, have emerged as promising materials due to their spherical morphology, versatile functionality, fluorescent property, colloidal stability, and high biocompatibility. Herein, we designed ND nanoclusters decorated with folic acid (FA) as a targeting moiety and utilized the photothermal effect of NDs upon NIR laser irradiation for tumor therapy.

Methodology & Theoretical Orientation: To evaluate the photothermal property of ND nanoclusters with various ND concentrations, samples were prepared and then exposed to NIR laser ( λ = 808 nm) for 5 min. in vivo tumor specificity and therapeutic efficacy also examined by injecting ND and FA-ND nanoclusters into tumor-bearing nude mice through a tail vein.

 Findings: FA-ND nanoclusters exhibited specific cellular uptake to KB cells. The viability of KB cells treated with FA-ND cluster was reduced to 5.4% (94.6% of ablation ratio) along the light of NIR laser. An in vivo studies revealed that FA-ND nanoclusters selectively accumulated in tumor tissue and effectively reduced tumor volume from 36.1 ± 5.2 mm3 to 21.4 ± 4.9 mm3 by the NIR laser-exposed.

Conclusion & Significance: We demonstrated the superior performance of FA-ND nanoclusters for selective photothermal tumor therapy. We believe that FA-ND nanoclusters have great potential for selective photothermal tumor therapy.