{"title":"Antitumor Effect of Oleoyl-siRNA against Pancreatic Cancer Using a Portal Vein Infusion Liver-Metastatic Mouse Model","authors":"Takanori Kubo, Kazuyoshi Yanagihara, Yoshio Nishimura, Yuki Iino, Teruo Komatsu, Rina Tansou, Keichiro Mihara, Toshio Seyama","doi":"10.1021/acs.molpharmaceut.4c00502","DOIUrl":null,"url":null,"abstract":"In this study, we developed an oleoyl-siRNA conjugate in which oleic acid was conjugated at the 5′-end of the sense strand of the siRNA. Furthermore, we examined the effects of RNAi in a mouse model of pancreatic cancer with liver metastasis. The mouse model of pancreatic cancer with liver metastasis was developed by implanting Sui67Luc human pancreatic cancer cells into the portal veins of mice. Sui67Luc cells have high expression of tumor-related genes such as β<i>-catenin</i>, <i>vascular endothelial growth factor</i>, and <i>programmed cell death ligand-1</i>. All genes were knocked down using siRNA, among which siRNA targeting β<i>-catenin</i> exhibited the most suitable RNAi effect. Therefore, we investigated the <i>in vitro</i> RNAi effect of oleoyl-siRNA (Ole-siRNA) targeting the β<i>-catenin</i> gene in Sui67Luc cells and found that it was stronger than that of unmodified siRNA. For <i>in vivo</i> experiments, we investigated the biodistribution, antitumor effect, and change in life expectancy of mice upon systemic administration of Ole-siRNA complexed with Invivofectamine 3.0 (IVF). In terms of biodistribution, the Ole-siRNA/IVF complex likely accumulates in the liver of mice. The antitumor effect of Ole-siRNA in a portal vein infusion liver-metastatic Sui67Luc tumor mouse model was evaluated using an <i>in vivo</i> imaging system. Ole-siRNA had a significant antitumor effect compared with nonmodified siRNA. In addition, mice with metastatic liver Sui67Luc tumors treated with Ole-siRNA showed increased survival. These results suggest that Ole-siRNAs are useful novel RNAi molecules for treating pancreatic cancer and liver metastasis.","PeriodicalId":52,"journal":{"name":"Molecular Pharmaceutics","volume":null,"pages":null},"PeriodicalIF":4.5000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Pharmaceutics","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1021/acs.molpharmaceut.4c00502","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MEDICINE, RESEARCH & EXPERIMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, we developed an oleoyl-siRNA conjugate in which oleic acid was conjugated at the 5′-end of the sense strand of the siRNA. Furthermore, we examined the effects of RNAi in a mouse model of pancreatic cancer with liver metastasis. The mouse model of pancreatic cancer with liver metastasis was developed by implanting Sui67Luc human pancreatic cancer cells into the portal veins of mice. Sui67Luc cells have high expression of tumor-related genes such as β-catenin, vascular endothelial growth factor, and programmed cell death ligand-1. All genes were knocked down using siRNA, among which siRNA targeting β-catenin exhibited the most suitable RNAi effect. Therefore, we investigated the in vitro RNAi effect of oleoyl-siRNA (Ole-siRNA) targeting the β-catenin gene in Sui67Luc cells and found that it was stronger than that of unmodified siRNA. For in vivo experiments, we investigated the biodistribution, antitumor effect, and change in life expectancy of mice upon systemic administration of Ole-siRNA complexed with Invivofectamine 3.0 (IVF). In terms of biodistribution, the Ole-siRNA/IVF complex likely accumulates in the liver of mice. The antitumor effect of Ole-siRNA in a portal vein infusion liver-metastatic Sui67Luc tumor mouse model was evaluated using an in vivo imaging system. Ole-siRNA had a significant antitumor effect compared with nonmodified siRNA. In addition, mice with metastatic liver Sui67Luc tumors treated with Ole-siRNA showed increased survival. These results suggest that Ole-siRNAs are useful novel RNAi molecules for treating pancreatic cancer and liver metastasis.
期刊介绍:
Molecular Pharmaceutics publishes the results of original research that contributes significantly to the molecular mechanistic understanding of drug delivery and drug delivery systems. The journal encourages contributions describing research at the interface of drug discovery and drug development.
Scientific areas within the scope of the journal include physical and pharmaceutical chemistry, biochemistry and biophysics, molecular and cellular biology, and polymer and materials science as they relate to drug and drug delivery system efficacy. Mechanistic Drug Delivery and Drug Targeting research on modulating activity and efficacy of a drug or drug product is within the scope of Molecular Pharmaceutics. Theoretical and experimental peer-reviewed research articles, communications, reviews, and perspectives are welcomed.