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- W3204757410 abstract "Abstract Background: Gene therapy shows great promise for a broad array of diseases. However, we found that hypoxic tumor microenvironment (TME) exerted significant inhibitory effects on transfection efficiency of a variety of gene vectors (such as Lipo 2000 and PEI) in an oxygen-dependent manner. Solid tumors inevitably resulted in acute hypoxic areas due to the rapid proliferation of tumor cells and the aberrant structure of blood vessels. Thus, the hypoxic TME severely limited the efficiency and application of gene therapy. Methods: In our previous study, we constructed endoplasmic reticulum-targeted cationic liposomes, PAR-Lipo, which could effectively deliver genes and ensure high transfection efficiency under normoxia. Unsatisfactorily, the transfection efficiency of PAR-Lipo was rather poor under hypoxia. We believed that reoxygenation was the most direct and effective means to rescue the low transfection under hypoxia. Hence, we fabricated liposomes modified with perfluorooctyl bromide (PFOB@Lipo) to load oxygen and deliver it to tumor sites, which effectively alleviated the hypoxic nature of tumor. Then PAR-Lipo were applied to mediate high-efficiency delivery of tumor suppressor gene pTP53 to inhibit tumor progression. Results: The results showed that such staged strategy augmented the expression of P53 protein in tumors and extremely suppressed tumor growth. Conclusion: This work was the first attempt to utilize an oxygen nanocarrier to assist the therapeutic effect of gene therapy under hypoxia, providing a new reference for gene therapy in malignant tumors." @default.
- W3204757410 created "2021-10-11" @default.
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- W3204757410 date "2021-10-05" @default.
- W3204757410 modified "2023-09-25" @default.
- W3204757410 title "Oxygen Nanocarrier Broke the Hypoxia Trap of Solid Tumors and Rescued Transfection Efficiency for Gene Therapy" @default.
- W3204757410 doi "https://doi.org/10.21203/rs.3.rs-951402/v1" @default.
- W3204757410 hasPublicationYear "2021" @default.
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