The invention discloses an acid responsive
nanoprobe as well as preparation and anti-tumor application thereof. The
nanoprobe has a core-shell structure, takes a
nanoparticle self-assembled by a polycation aggregation-induced emission (AIE)
photosensitizer and functional
nucleic acid as a core, and takes a
hyaluronic acid modified
metal polyphenol network as a shell. The
nanoprobe utilizes the acid responsiveness and broad-spectrum absorption performance of the
metal polyphenol network and the diagnosis and treatment advantages of the polycation AIE
photosensitizer to realize the acid responsiveness'switch 'controllable diagnosis and treatment of the tumor nanoprobe. In a neutral environment, the
fluorescence is weak, the generation of ROS is less, and the
background noise signal of the nanoprobe and the
toxicity of non-targeted tissues are reduced; in an acid environment,
fluorescence is enhanced, the ROS yield is improved, and the treatment efficiency and the
curative effect monitoring accuracy are improved. The nano diagnosis and treatment probe is ingenious in design and simple to prepare, and can realize PDT and
gene therapy synergistic anti-tumor, in-situ real-time report of early tumor
treatment effect and assistance in precise
cancer treatment.