Abstract
MicroRNAs (miRNAs) are involved in the pathogenesis of several cancers including skin squamous cell carcinoma (sSCC), and miR-134 is reported to possess tumor inhibition properties. The present study is an attempt to study the mechanistic role and antitumor property of miR-134 in sSCC. For this purpose, α-tocopherol PEG 1000 succinate (TPGS)-based PEGylated liposome was formulated and encapsulated with miR-134 (TP-miR-LP). CCK-8 assay results showed that miR-134 exhibited a concentration-dependent decrease in the cell viability of A-431 cells. Importantly, TPGS-based TP-miR-LP showed significantly (p < 0.05) lower cell viability compared with that of miR-134-loaded PEGylated liposome (miR-LP). Western blot analysis clearly indicates the specific targeting ability of miR-134 (TP-miR-LP) towards the Forkhead Box M1 (FOXM1) in the cancer cells. The apoptosis rate of the cells was significantly increased in TP-miR-LP (~ 38%) than that of miR-LP (~ 15%), respectively with significant inhibition of cell migration. Importantly, tumors treated with TP-miR-LP grew significantly slower compared with that of any other formulation group in the xenograft animal model. Present results clearly demonstrate the tumor suppressive effect of miR-134 through the downregulation of FOXM1 which subsequently blocks the downstream signaling pathways. These findings suggest the translational potential of miR-134 towards designing formulation strategies for sSCC treatment.
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Abbreviations
- miRNA:
-
microRNA
- sSCC:
-
skin squamous cell carcinoma
- TPGS:
-
α-tocopherol PEG 1000 succinate
- miR-LP:
-
miR-134-loaded PEGylated liposome
- TP-miR-LP:
-
miR-134-loaded TPGS-based PEGylated liposome
- Mut-LP:
-
mutant miR-134-loaded PEGylated liposome
- N/P ratio:
-
nitrogen/phosphate ratio
- MDR:
-
multidrug drug resistance
- FOXM1:
-
Forkhead Box M1
- EPR:
-
enhanced permeation and retention effect
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This study was supported by the Key Technologies R & D Program from the Department of Science and Technology of Henan Province (No: 162102310176).
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All the animal protocols for the experiments were approved by the Institutional Committee on Animal Research in the Henan University People’s Hospital, Zhengzhou.
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Jing, C., Yan, L., Wei, Z. et al. Exogenous delivery of microRNA-134 (miR-134) using α-tocopherol-based PEGylated liposome for effective treatment in skin squamous cell carcinoma. Drug Deliv. and Transl. Res. 11, 1000–1008 (2021). https://doi.org/10.1007/s13346-020-00811-7
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DOI: https://doi.org/10.1007/s13346-020-00811-7