Platelet Membrane‐Coated Curcumin‐PLGA Nanoparticles Promote Astrocyte‐Neuron Transdifferentiation for Intracerebral Hemorrhage Treatment

Intracerebral hemorrhage (ICH) is a hemorrhagic disease with high mortality and disability rates. Curcumin is a promising drug for ICH treatment due to its multiple biological activities, but its application is limited by its poor watersolubility and instability. Herein, platelet membrane‐coated curcumin polylactic‐co‐glycolic acid (PLGA) nanoparticles (PCNPs) are prepared to achieve significantly improved solubility, stability, and sustained release of curcumin. Fourier transform infrared spectra and X‐ray diffraction assays indicate good encapsulation of curcumin within nanoparticles. Moreover, it is revealed for the first time that curcumin‐loaded nanoparticles can not only suppress hemin‐induced astrocyte proliferation but also induce astrocytes into neuron‐like cells in vitro. PCNPs are used to treat rat ICH by tail vein injection, using in situ administration as control. The results show that PCNPs are more effective than curcumin‐PLGA nanoparticles in concentrating on hemorrhagic lesions, inhibiting inflammation, suppressing astrogliosis, promoting neurogenesis, and improving motor functions. The treatment efficacy of intravenously administered PCNPs is comparable to that of in situ administration, indicating a good targeting effect of PCNPs on the hemorrhage site. This study provides a potent treatment for hemorrhagic injuries and a promising solution for efficient delivery of water‐insoluble drugs using composite materials of macromolecules and cell membranes. Platelet membrane‐coated curcumin‐PLGA nanoparticles (PCNPs) can increase the solubility and stability of curcumin, inhibit hemin‐induced astrocyte proliferation, and promote astroglial‐to‐neuronal transdifferentiation in vitro. After transplantation into intracerebral hemorrhage rats, PCNPs can concentrate on the bleeding site, inhibit inflammation and glial scar hyperplasia, promote brain tissue survival and neurogenesis, and improve the comprehensive motor ability of the animals.