In:
Biomaterials Science, Royal Society of Chemistry (RSC), Vol. 9, No. 20 ( 2021), p. 6772-6786
Abstract:
The low oxygen level in tumors significantly reduces the antitumor efficacy of photodynamic therapy (PDT). The provision of O 2 and monomeric hydrophobic photosensitizers (PSs) under physiological conditions would greatly help to shrink malignant tumors. We take advantage of the high porosity and multifunctionality of metal–organic frameworks (MOFs) to fabricate a simple all-in-one nanoplatform mediated by microneedle delivery to achieve synergistic O 2 evolution and chemophototherapy. An iron( iii )-based MOF (MIL-100(Fe)) acted not only as a vehicle for the concurrent delivery of zinc phthalocyanine (ZnPc) and doxorubicin hydrochloride (Dox), but also to supply O 2 by decomposing hydrogen peroxide (H 2 O 2 ) in the tumor microenvironment via a Fenton-like reaction. In vitro and in vivo experiments indicated that the nanoplatform had excellent biocompatibility and exerted enhanced anticancer effects. The encapsulated drug was sustainably released from the nanoplatform skeleton in response to acidic tumor microenvironments. Moreover, upon 660 nm light irradiation, ZnPc effectively produced reactive oxygen species (ROS) due to the reduction of hypoxia by MIL-100(Fe). A microneedle technique was adopted to directly deliver the nanoplatform into superficial tumors rather than via systemic circulation. Hence, this study provides a new strategy for more efficient chemophototherapy of hypoxic superficial tumors.
Type of Medium:
Online Resource
ISSN:
2047-4830
,
2047-4849
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
2693928-9
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