Abstract
A multifunctional nanoplatform APIPB–MnCO@TPP@N,P-GQDs (APIPB = N-(2-aminophen-yl)-4-(1H-imidazo[4,5-f] [1, 10] phenanthrolin-2-yl) benzamide, TPP = triphenylphosphine, Mn = manganese, CO = carbon monoxide, and GQDs = graphene quantum dots), nanoplatform (1), was synthesized, which consists of a fluorescent N, P-doped GQDs carrier with its surface covalently functionalized by an CO donor APIPB–MnCO with histone deacetylases (HDAC) inhibitory property and a TPP derivative directing group. Nanoplatform (1) selectively localized in the mitochondria of HeLa cells to inhibit HDAC activity, and released CO upon 808 nm near-infrared light irradiation, destroying the mitochondria and thus inducing cancer cells apoptosis. The targeted subcellular mitochondrial CO delivery combined with inhibitory HDAC activity maximized the cytotoxicity of the nanoplatform which may provide new insights for CO-mediated multimodal therapies for cancer treatment.
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