Intracellular fluorescent light-up bioprobes with different morphology for image-guided photothermal cancer therapy.
Multifunctional nanoprobe was drawing increased attention in tumor diagnosis and therapy. The simple and effective establishment of the theranostic nanoplatforms was still under urgent need. Meanwhile, the targeting ability and morphology of nanoprobe were essential for the effective endocytosis, which could further affect the diagnosis. In this work, two morphologies of nanoprobes were fabricated using gold nanorods (AuNRs) and gold nanospheres (AuNSs). Thiolated-hyaluronic acid labeled with nile blue (HS-HA-NB), a near-infrared (NIR) fluorescence dye, was coated on the surface of the gold nanoparticles to form stable nanoprobes (AuNR@HS-HA-NB, AuNS@HS-HA-NB). The fluorescence of NB molecules quenched outside cells due to the fluorescence resonance energy transfer (FRET), and recovered after the HA degradation inside the cells. HA also could enhance cellular uptake in CD44 receptor highly expressed human breast carcinoma cells (MCF-7). In this way, bioprobes realized the MCF-7 cell images through intracellular fluorescent light-up. Comparing with the sphere bioprobe, the rod-shaped bioprobe dramatically promoted endocytosis to achieve a better diagnosis effect in a short time. After NIR light irradiation, severe MCF-7 apoptosis was observed with AuNR@HS-HA-NB existed. Our studies suggested that the AuNR@HS-HA-NB nanoparticles were the excellent candidates of versatile bioprobes to realize rapid, precise image and photothermal therapy to MCF-7 cells.
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China.
Bangbang
B
Li
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China.
Peng
P
Zhang
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China.
Jianwei
J
Du
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China.
Xiao
X
Zhao
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China. Electronic address: yx_wang@zju.edu.cn.
Youxiang
Y
Wang
D015374:Biosensing Techniques; D002470:Cell Survival; D004705:Endocytosis; D005456:Fluorescent Dyes; D006046:Gold; D006801:Humans; D006820:Hyaluronic Acid; D007259:Infrared Rays / Q000627:therapeutic use; D061986:MCF-7 Cells; D053768:Metal Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D043942:Nanotubes / Q000737:chemistry / Q000648:ultrastructure; D010078:Oxazines; D010789:Phototherapy / Q000379:methods*; D000068936:Theranostic Nanomedicine / Q000379:methods
D005456:Fluorescent Dyes; D010078:Oxazines; C008619:Nile Blue; D006046:Gold; D006820:Hyaluronic Acid
Fluorescence resonance energy transfer; Gold nanorods; Hyaluronic acid; Nanoprobe; Photothermal therapy