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Recent advances in the treatment of peritoneal dissemination of gastrointestinal cancers by nucleoside antimetabolites Yonemura Y; Endo Y; Obata T; Sasaki TCancer Sci 2007[Jan]; 98 (1): 11-8Peritoneal dissemination is the most common cause of metastasis from malignancies in the abdominal cavity. There are no standard treatments for peritoneal dissemination and the results are poor. The reasons for this are as follows: (1) no effective chemotherapeutic agents have been identified or developed; (2) surgical cytoreduction has little effect on survival improvement; and (3) the molecular mechanisms of peritoneal dissemination have not been clarified and no therapy against the target molecules has been developed. However, studies on the molecular mechanisms of peritoneal dissemination have elucidated some of the target molecules and the development of new multimodal therapies has also improved survival. Early postoperative intraperitoneal chemotherapy, hyperthermic intraperitoneal perfusion chemotherapy and neoadjuvant intraperitoneal-systemic chemotherapy have been newly developed, and a novel surgical therapy named peritonectomy has been proposed to perform complete cytoreduction of peritoneal dissemination. At present, these approaches appear to be effective therapeutic modalities for peritoneal dissemination. However, TS-1 and capecitabine have shown worthwhile results in recent clinical trials for patients with advanced gastric cancer. We recently found that newly developed antitumor cytosine nucleoside analogs show a survival advantage in peritoneal dissemination models using human cancer cells. These non-fluoropyrimidine nucleosides may potentially help to improve the poor prognosis observed in patients with advanced cancers involving peritoneal dissemination.|Adenocarcinoma/*drug therapy/*secondary[MESH]|Animals[MESH]|Antimetabolites, Antineoplastic/*therapeutic use[MESH]|Gastrointestinal Neoplasms/*pathology[MESH]|Humans[MESH]|Peritoneal Neoplasms/*drug therapy/*secondary[MESH]|Pyrimidine Nucleosides/chemistry/metabolism[MESH] |
