Synthesis of SiO2@Cu2-xSe nanospheres for efficient near-infrared radiation mediated treatment and care of gastric cancer patients
2020
Zhang, Xiuhua | Wang, Lijun | Wu, Xia | Cong, Chunhua
Rational design and fabrication of suitable optical absorbing agents (OAAs) are of great significance for state-of-the-art photothermal cancer therapy. Copper selenides have recently emerged as a type of promising photothermal operators thanks to their engineered effortlessness, high carrier concentration, and superior photothermal transformation. Nevertheless, the further in vivo applications are hampered owing to their poor biocompatibility and hydrophobicity. Herein, we synthesized the judicious structure of Cu₂₋ₓSe nanospheres coated with mesoporous silica for improving their biocompatibility and hydrophilicity. The Cu₂₋ₓSe@mSiO₂ core–shell nanospheres were studied by scanning/transmission electron microscopy (SEM/TEM), X-ray (XRD and XPS), and UV–Visible techniques. Such nanocomposite achieved great ability in photothermal removal of cancer cells with little toxicity. The cell death mechanism has been investigated through typical biochemical assays including acridine orange and ethidium bromide (AO-EB), flowcytometry, and nuclear staining. In addition, the cell cycle arrest in human gastric cancer cells (GCCs) has also been evaluated. Strikingly, the in vivo chemo-photothermal therapy of as-prepared Cu₂₋ₓSe@mSiO₂ toward GCCs confirms the excellent antitumor activity of the core-shell nanospheres under near-infrared radiation (NIR) radiation. It is firmly believed that the Cu₂₋ₓSe@mSiO₂ nanocomposites hold great potential to function as OAAs for NIR mediated treatment and care of gastric cancer patients.
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