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- W4309486445 abstract "Conventional intratumoural drug delivery systems often struggle to achieve both high permeability and long-term retention. Smaller nanoparticles (NPs) readily diffuse into deep tumour regions, but their rapid clearance results in lower accumulation at tumour sites. Furthermore, although immunostimulatory molecules have been introduced for the immunotherapy of tumours, it is crucial to develop drug nanovehicles with immunomodulatory functions. Here, a novel self-assembled amphiphilic peptide, IpYR, self-assembled into spherical NPs after drug loading, which were transformed into nanofibres (NFs) with a high aspect ratio under the induction of alkaline phosphatase (ALP). This drug-loading system effectively prolonged the residence time of the chemotherapeutic drug in tumour tissues and displayed enhanced aggregation at tumour sites in vivo. Furthermore, the transformable peptide NPs not only inhibited tumour growth but also suppressed tumour invasion and metastasis in vitro and in vivo. Importantly, the peptide nanovehicles inhibited the proliferation of Treg cells, downregulated the expression of immunosuppressive factors and PD-L1, and simultaneously stimulated the expression of immunogenic factors, effectively alleviating the immunosuppressive microenvironment. In conclusion, this transformable peptide-based nanodelivery system is a concise and promising nanoplatform for maintaining potent drug enrichment and inhibiting immunosuppression in the tumour microenvironment." @default.
- W4309486445 created "2022-11-28" @default.
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- W4309486445 date "2023-02-01" @default.
- W4309486445 modified "2023-09-27" @default.
- W4309486445 title "Enzyme-induced morphological transformation of self-assembled peptide nanovehicles potentiates intratumoral aggregation and inhibits tumour immunosuppression" @default.
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- W4309486445 doi "https://doi.org/10.1016/j.cej.2022.140466" @default.
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