Abstract
Background: We previously demonstrated that the reduced expression in immortalized cells (REIC)/dikkopf-3 (Dkk-3) gene was downregulated in various malignant tumors, and that an adenovirus vector carrying the REIC/Dkk-3 gene, termed Ad-REIC induced cancer-selective apoptosis in pancreatic cancer and hepatocellular carcinoma.
Objective: In this study, we examined the therapeutic effects of Ad-REIC in biliary cancer using a second- generation Ad-REIC (Ad-SGE-REIC).
Methods: Human biliary cancer cell lines (G-415, TFK-1) were used in this study. The cell viability and apoptotic effect of Ad-SGE-REIC were assessed in vitro using an MTT assay and Hoechst staining. The anti-tumor effect in vivo was assessed in a mouse xenograft model. We also assessed the therapeutic effects of Ad-SGE-REIC therapy with cisplatin. Cell signaling was assessed by Western blotting.
Results: Ad-SGE-REIC reduced cell viability, and induced apoptosis in biliary cancer cell lines via the activation of the c-Jun N-terminal kinase pathway. Ad-SGE-REIC also inhibited tumor growth in a mouse xenograft model. This effect was further enhanced in combination with cisplatin.
Conclusion: Ad-SGE-REIC induced apoptosis and inhibited tumor growth in biliary cancer cells. REIC/Dkk-3 gene therapy using Ad-SGE-REIC is an attractive therapeutic tool for biliary cancer.
Keywords: REIC/Dkk-3, gene therapy, apoptosis, biliary cancer, chemotherapy, cisplatin.
Graphical Abstract
[http://dx.doi.org/10.3322/caac.21551] [PMID: 30620402]
[http://dx.doi.org/10.1007/s11894-017-0542-4] [PMID: 28110453]
[http://dx.doi.org/10.1056/NEJMoa0908721] [PMID: 20375404]
[http://dx.doi.org/10.1038/sj.bjc.6605779] [PMID: 20628385]
[http://dx.doi.org/10.1006/bbrc.1999.2067] [PMID: 10652205]
[http://dx.doi.org/10.1158/0008-5472.CAN-05-0829] [PMID: 16266978]
[http://dx.doi.org/10.1111/jgh.12501] [PMID: 24372695]
[http://dx.doi.org/10.1038/sj.cgt.7701071] [PMID: 17599093]
[http://dx.doi.org/10.1038/cgt.2008.58] [PMID: 18654608]
[http://dx.doi.org/10.1111/apt.15050] [PMID: 30637783]
[http://dx.doi.org/10.1093/annonc/mdh351] [PMID: 15319238]
[http://dx.doi.org/10.1093/jjco/hyv213] [PMID: 27025903]
[http://dx.doi.org/10.1093/annonc/mdy282]
[http://dx.doi.org/10.1056/NEJMoa1011923] [PMID: 21561347]
[http://dx.doi.org/10.1056/NEJMoa1304369] [PMID: 24131140]
[http://dx.doi.org/10.1056/NEJMoa1903387] [PMID: 31157963]
[http://dx.doi.org/10.1038/nrclinonc.2017.157] [PMID: 28994423]
[http://dx.doi.org/10.1016/S1470-2045(19)30733-8] [PMID: 31908303]
[http://dx.doi.org/10.1186/s13045-015-0155-z] [PMID: 26022204]
[http://dx.doi.org/10.21037/cco.2019.08.14] [PMID: 31484490]
[http://dx.doi.org/10.1200/JCO.2017.75.5009] [PMID: 29182496]
[http://dx.doi.org/10.21037/hbsn.2019.04.11] [PMID: 31929987]
[http://dx.doi.org/10.1158/0008-5472.CAN-08-0080] [PMID: 18922905]
[http://dx.doi.org/10.1111/jgh.13757] [PMID: 28168749]
[http://dx.doi.org/10.1371/journal.pone.0087900] [PMID: 24498395]
[http://dx.doi.org/10.3892/ol.2013.1777] [PMID: 24527065]
[http://dx.doi.org/10.1038/sj.gt.3301453] [PMID: 11406768]
[http://dx.doi.org/10.1089/10430340050111368] [PMID: 10954905]
[http://dx.doi.org/10.3892/ijo_00000191] [PMID: 19212670]
[http://dx.doi.org/10.1111/jgh.13259] [PMID: 26643412]
[http://dx.doi.org/10.1056/NEJMoa1500596] [PMID: 26028255]
[http://dx.doi.org/10.1016/j.canlet.2017.08.006] [PMID: 28826722]
[http://dx.doi.org/10.1186/s40425-019-0692-z] [PMID: 31383016]