Abstract
Background: MicroRNA modulation therapy has shown great promise to treat hepatocellular carcinoma (HCC), however Efficient tissue-specific and safe delivery remains a major challenge.
Objective: We sought to develop an inorganic-organic hybrid vehicle for the systemic delivery of the tumor suppressor miR-34a, and to investigate the efficiency of the delivered miR-34a in the treatment of HCC in vitro and in vivo.
Methods: In the present study, pEGP-miR cloning and expression vector, expressing miR-34a, was electrostatically bound to polyethyleneimine (PEI), and then loaded onto ZSM-5 zeolite nanoparticles (ZNP). Qualitative and quantitative assessment of the transfection efficiency of miR-34a construct in HepG2 cells was applied by GFP screening and qRT-PCR, respectively. The expression of miR-34a target genes was investigated by qRT-PCR in vitro and in vivo.
Results: ZNP/PEI/miR-34a nano-formulation could efficiently deliver into HepG2 cells with low cytotoxicity, indicating good biocompatibility of generated nanozeolite. Furthermore, five injected doses of ZNP/PEI/miR-34a nano-formulation in HCC induced male Balb-c mice, significantly inhibited tumor growth, and demonstrated improved cell structure, in addition to a significant decrease in alphafetoprotein level and liver enzymes activities, as compared to the positive control group. Moreover, injected ZNP/PEI/miR-34a nano-formulation led to a noticeable decrease in the CD44 and c-Myc levels. Results also showed that ZNP/PEI/miR-34a nano-formulation inhibited several target oncogenes including AEG-1, and SOX-9, in vitro and in vivo.
Conclusion: Our results suggested that miR-34a is a powerful candidate in HCC treatment and that AEG-1 and SOX-9 are novel oncotargets of miR-34a in HCC. Results also demonstrated that our nano-formulation may serve as a candidate approach for miR-34a restoration for HCC therapy, and generally for safe gene delivery.
Keywords: Hepatocellular carcinoma, tumor suppressor miRNA, replacement therapy, nanozeolite, gene delivery, oncotargets.
Graphical Abstract
[http://dx.doi.org/10.1080/01913123.2017.1316330] [PMID: 28494215]
[http://dx.doi.org/10.5772/54862]
[http://dx.doi.org/10.1186/2052-8426-2-7] [PMID: 26056576]
[http://dx.doi.org/10.1007/s13277-014-2445-4] [PMID: 25119594]
[http://dx.doi.org/10.1016/j.gpb.2013.05.007] [PMID: 24287119]
[http://dx.doi.org/10.4103/ijssr.ijssr_6_17]
[http://dx.doi.org/10.18632/oncotarget.14807] [PMID: 28129650]
[http://dx.doi.org/10.1038/labinvest.2017.12] [PMID: 28218742]
[http://dx.doi.org/10.3389/fgene.2012.00120] [PMID: 22783274]
[http://dx.doi.org/10.1158/1535-7163.MCT-14-0209] [PMID: 25053820]
[PMID: 27347323]
[http://dx.doi.org/10.3892/ol.2017.5826] [PMID: 28529562]
[http://dx.doi.org/10.1007/s13346-013-0160-0] [PMID: 25786616]
[http://dx.doi.org/10.5772/53392]
[http://dx.doi.org/10.1038/s41417-017-0004-z] [PMID: 29255216]
[http://dx.doi.org/10.1016/j.apsb.2018.01.007] [PMID: 29719777]
[http://dx.doi.org/10.1002/jbm.a.34466] [PMID: 23184619]
[http://dx.doi.org/10.1002/jbm.b.33037] [PMID: 24123971]
[http://dx.doi.org/10.1088/0957-4484/19/17/175103] [PMID: 21825661]
[http://dx.doi.org/10.1016/j.micromeso.2008.02.030]
[http://dx.doi.org/10.1021/tx900153k] [PMID: 19580308]
[http://dx.doi.org/10.1016/j.acthis.2018.02.005] [PMID: 29496266]
[PMID: 23193297]
[http://dx.doi.org/10.1038/nmeth.3485] [PMID: 26226356]
[http://dx.doi.org/10.3727/096504013X13747716581336] [PMID: 24063282]
[http://dx.doi.org/10.1093/ajcp/28.1.56] [PMID: 13458125]
[PMID: 24341124]
[http://dx.doi.org/10.1177/030098588602300302] [PMID: 3088810]
[PMID: 22110190]
[http://dx.doi.org/10.1200/JCO.2005.03.196] [PMID: 15860847]
[http://dx.doi.org/10.1007/s11095-011-0548-9] [PMID: 21879389]
[http://dx.doi.org/10.1038/mt.2010.136] [PMID: 20606648]
[http://dx.doi.org/10.1590/s2175-97902018000100265]
[http://dx.doi.org/10.1155/2010/863136]
[http://dx.doi.org/10.1007/s11095-006-0284-8] [PMID: 16779701]
[http://dx.doi.org/10.1039/C6CP07572J] [PMID: 28000819]
[http://dx.doi.org/10.1007/s10934-013-9679-1]
[http://dx.doi.org/10.1016/j.biomaterials.2010.02.033] [PMID: 20304483]
[http://dx.doi.org/10.1177/0192623307309925] [PMID: 18337227]
[http://dx.doi.org/10.1016/j.addr.2006.09.008] [PMID: 17079050]
[http://dx.doi.org/10.1016/j.ymthe.2005.02.010] [PMID: 15922971]
[http://dx.doi.org/10.1021/bc060133v] [PMID: 16984145]
[http://dx.doi.org/10.1021/nn700256c] [PMID: 19206551]
[http://dx.doi.org/10.3791/50176] [PMID: 23486314]
[http://dx.doi.org/10.1177/1010428318773675] [PMID: 29775159]
[http://dx.doi.org/10.18632/oncotarget.2905] [PMID: 25686834]