Marked regression of liver metastasis by combined therapy of ultrasound-mediated NFkB-decoy transfer and transportal injection of paclitaxel, in mouse

Haruhito Azuma, Naruya Tomita, Takeshi Sakamoto, Satoshi Kiyama, Teruo Inamoto, Kiyoshi Takahara, Yatsugu Kotake, Naoki Segawa, Ryuichi Morishita, Shiro Takahara, Hana Hayasaki, Yoshinori Otsuki, Shigeo Horie, Nobuhiko Tanigawa, Yoji Katsuoka

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Nuclear factor-kappaB (NFkB) plays a pivotal role in cancer progression. In this study, we developed a decoy cis-element oligodeoxyribonucleic acid against NFkB-binding site (NFkB-decoy), which effectively inhibits NFkB activity, and tested the effect of combined therapy comprising local transfection of NFkB-decoy into the liver and transportal injection of paclitaxel on cancer growth and metastasis using an orthotopic murine model of colon cancer liver metastasis. For NFkB-decoy transfection, we employed a novel approach using ultrasound exposure with an echocardiographic contrast agent, Optison. We examined the influence of NFkB-decoy transfer on susceptibility to paclitaxel in cancer cells and the mechanism involved using several in vitro analysis systems. We then studied the in vivo effect of combined NFkB-decoy transfer and paclitaxel in preventing cancer progression using a murine model of liver metastasis created by splenic injection of a human colon cancer cell line, HT29. In vitro experiments, including MTT-assay, fluorescence-activated cell sorter and cDNA array analysis, revealed that NFkB-decoy transfer significantly increased the susceptibility of cancer cells to paclitaxel, and that decreased expression of anti-apoptotic genes along with increased expression of genes relevant to the apoptosis-promotor may be involved. In vivo experiments showed that local transfection of NFkB-decoy into the liver followed by portal injection of paclitaxel effectively induced cancer cell apoptosis in the liver metastasis, and significantly prolonged animal survival compared to controls, without notable side effects. In conclusion, a combination of local NFkB-decoy transfer into the liver and transportal injection of paclitaxel may be a safe and effective new therapy for liver metastasis.

Original languageEnglish
Pages (from-to)1645-1656
Number of pages12
JournalInternational Journal of Cancer
Volume122
Issue number7
DOIs
Publication statusPublished - 01-04-2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Cancer Research
  • Oncology
  • Medicine(all)

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    Azuma, H., Tomita, N., Sakamoto, T., Kiyama, S., Inamoto, T., Takahara, K., Kotake, Y., Segawa, N., Morishita, R., Takahara, S., Hayasaki, H., Otsuki, Y., Horie, S., Tanigawa, N., & Katsuoka, Y. (2008). Marked regression of liver metastasis by combined therapy of ultrasound-mediated NFkB-decoy transfer and transportal injection of paclitaxel, in mouse. International Journal of Cancer, 122(7), 1645-1656. https://doi.org/10.1002/ijc.23280