{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,29]],"date-time":"2025-12-29T11:36:55Z","timestamp":1767008215649,"version":"3.40.5"},"reference-count":50,"publisher":"Wiley","issue":"17","license":[{"start":{"date-parts":[[2019,10,14]],"date-time":"2019-10-14T00:00:00Z","timestamp":1571011200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005623","name":"University of Tokushima","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100005623","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cancer Medicine"],"published-print":{"date-parts":[[2019,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>In advanced gastric cancer, peritoneal dissemination is a life\u2010threatening mode of metastasis. Since the treatment options with conventional chemotherapy remain limited, any novel therapeutic strategy that could control such metastasis would improve the outcome of treatment. We recently developed a unique RNA interference therapeutic regimen (DFP\u201010825) consisting of short hairpin RNA against thymidylate synthase (TS shRNA) and cationic liposomes. The treatment with DFP\u201010825 has shown remarkable antitumor activity in peritoneally disseminated human ovarian cancer\u2013bearing mice via intraperitoneal administration. In this study, we expanded DFP\u201010825 to the treatment of peritoneally disseminated gastric cancer.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>DFP\u201010825 was administered intraperitoneally into mice with intraperitoneally implanted human gastric cancer cells (MKN45 or NCI\u2010N87). Antitumor activity and host survival benefits were monitored. Intraperitoneal distribution of fluorescence\u2010labeled DFP\u201010825 was monitored in this MKN45 peritoneally disseminated mouse model.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Intraperitoneal injection of DFP\u201010825 suppressed tumor growth in two peritoneally disseminated cancer models (MKN45 and NCI\u2010N87) and increased the survival time of the MKN45 model without severe side effects. Throughout the treatment regimen, no significant body weight loss was associated with the administration of DFP\u201010825. Interestingly, after intraperitoneal injection, fluorescence\u2010labeled DFP\u201010825 retained for more than 72\u00a0hours in the peritoneal cavity and selectively accumulated in disseminated tumors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Intraperitoneal injection of DFP\u201010825 demonstrated effective antitumor activity without systemic severe adverse effects via the selective delivery of RNAi molecules into disseminated tumors in the peritoneal cavity. Our current study indicates that DFP\u201010825 could become an alternative option to improve the outcomes of patients with peritoneally disseminated gastric cancer.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cam4.2598","type":"journal-article","created":{"date-parts":[[2019,10,14]],"date-time":"2019-10-14T09:17:32Z","timestamp":1571044652000},"page":"7313-7321","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["A novel intraperitoneal therapy for gastric cancer with DFP\u201010825, a unique RNAi therapeutic targeting thymidylate synthase, in a peritoneally disseminated xenograft model"],"prefix":"10.1002","volume":"8","author":[{"given":"Hidenori","family":"Ando","sequence":"first","affiliation":[{"name":"Department of Pharmacokinetics and Biopharmaceutics Institute of Biomedical Sciences Tokushima University Tokushima 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