Journal
SMALL
Volume 17, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202006004
Keywords
active motion; gold nanorods; Janus nanoparticles; photoacoustic imaging; synergistic therapy
Categories
Funding
- National Key Research and Development Program of China [2017YFA0106100, 2016YFA0201501]
- National Natural Science Foundation of China [51922022, 51773013, 51733001]
- Beijing Outstanding Young Scientist Program [BJJWZYJH01201910010024]
- Fundamental Research Funds for the Central Universities [BHYC1705A, XK1802-2]
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The study developed a series of symmetrical and unsymmetrical chitosan/gold nanoparticles, utilizing the active motion derived from Janus structure, selective surface functionalization of polysaccharide domain, and photothermal effect of gold nanorods to construct Janus-structured chitosan/gold nanohybrids for breast cancer treatment. Investigating the morphology effect of chitosan/gold nanostructures on enhanced PTT, cellular uptake, and gene transfection, as well as exploring the feasibility of PA imaging to track the accumulation of J-ACP and guide PTT.
The unsymmetrical morphology and unique properties of Janus nanoparticles (JNPs) provide superior performances for biomedical applications. In this work, a general and facile strategy is developed to construct a series of symmetrical and unsymmetrical chitosan/gold nanoparticles. Taking advantage of the active motion derived from Janus structure, selective surface functionalization of polysaccharide domain, and photothermal effect of gold nanorods, Janus chitosan/gold nanoparticles (J-Au-CS) are selected as a model system to construct Janus-structured chitosan/gold nanohybrids (J-ACP). Near-infrared (NIR)-responsive J-ACP composed of polycationic chitosan nanospheres and PEGylated gold nanorods hold great potential to realize photoacoustic (PA) imaging-guided complementary photothermal therapy (PTT)/gene therapy for breast cancer. The morphology effect of chitosan/gold nanostructures on enhanced PTT, cellular uptake, and gene transfection is investigated. The feasibility of PA imaging to track the accumulation of J-ACP and guide PTT is also explored. Notably, synergistic therapy is achieved based on PTT-enhanced gene therapy. In addition, the loading function of chitosan/gold nanoparticles for fluorescence imaging is demonstrated. The current work extends the application of JNPs for imaging-guided synergistic cancer therapy and provides flexible candidates with distinct structures for diverse biomedical applications.
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