alexa A phase I trial of thermal sensitization using induced oxidative stress in the context of HIPEC.
Gastroenterology

Gastroenterology

Journal of Gastrointestinal & Digestive System

Author(s): Harrison LE, Tiesi G, Razavi R, Wang CC

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Abstract BACKGROUND: Inducing oxidative stress under hyperthermic conditions significantly decreases tumor cell growth in a murine model of human colon cancer carcinomatosis. This phase I study examines the safety and pharmacokinetics of induced oxidative stress by the addition of hydrogen peroxide (H2O2) to the perfusate in patients undergoing cytoreduction and hyperthermic intraperitoneal chemotherapy (HIPEC) for advanced abdominal-only malignancies. METHODS: Patients with advanced colon or appendiceal malignancies underwent maximal cytoreduction followed by HIPEC with mitomycin C (MMC). In addition, H2O2 was added to the perfusate at three concentrations (n = 3/level, 0.05, 0.075, 0.1 \%). A control group consisted of patients perfused with MMC alone (n = 3). Perfusate, serum MMC, and H2O2 levels were measured, as were tissue levels of MMC. RESULTS: Twelve patients were enrolled onto this trial. The median (range) peritoneal carcinomatosis index was 13 (3-20) requiring a median operative time of 6.3 (4-8.5) h. The median postoperative length of stay was 9 (5-34) days, with six patients requiring readmission within 30 days. Similar complications were observed at all three H2O2 levels, as well as in the control group. One patient required reexploration for a colon perforation (control group), and three patients developed enterocutaneous fistulas (0.075 \% H2O2, 0.1 \% H2O2 and control group). There were no operative mortalities. CONCLUSIONS: Hyperthermic intraperitoneal chemotherapy with induced oxidative stress after maximal cytoreduction is well tolerated. On the basis of the encouraging toxicity profile after cytoreduction and HIPEC with induced oxidative stress, a phase II trial to verify activity is indicated. This article was published in Ann Surg Oncol and referenced in Journal of Gastrointestinal & Digestive System

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