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CLINICAL TRIAL, PHASE I
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
Novel Treatment with Intraperitoneal MOC31PE Immunotoxin in Colorectal Peritoneal Metastasis: Results From the ImmunoPeCa Phase 1 Trial.
Annals of Surgical Oncology 2017 July
BACKGROUND: MOC31PE immunotoxin was developed to rapidly kill cells expressing the tumor-associated epithelial cell adhesion molecule, which is highly expressed in colorectal cancer. Although cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) may offer long-term survival to patients with peritoneal metastasis from colorectal cancer (PM-CRC), most patients experience disease relapse and novel therapeutic options are needed. On this basis, MOC31PE is being developed as a novel therapeutic principle to target PM-CRC.
METHODS: This was a dose-escalating phase I trial to evaluate the safety and toxicity (primary endpoint), pharmacokinetic profile, and neutralizing antibody response (secondary endpoints) upon intraperitoneal administration of MOC31PE in patients with PM-CRC undergoing CRS-HIPEC with Mitomycin C. Fifteen patients received the study drug at four dose levels (3+3+3+6), administered intraperitoneally as a single dose the day after CRS-HIPEC.
RESULTS: No dose-limiting toxicity was observed, and the maximum tolerated dose was not reached. There was negligible systemic absorption of the study drug. Drug concentrations in peritoneal fluid samples were in the cytotoxic range and increased in a dose-dependent manner. MOC31PE recovered from peritoneal cavity retained its cytotoxic activity in cell-based assays. All patients developed neutralizing antibodies.
CONCLUSIONS: Intraperitoneal administration of MOC31PE was safe and well tolerated, and combined with low systemic uptake, MOC31PE seems ideal for local intraperitoneal treatment. The drug will be further evaluated in an ongoing phase II expansion cohort.
METHODS: This was a dose-escalating phase I trial to evaluate the safety and toxicity (primary endpoint), pharmacokinetic profile, and neutralizing antibody response (secondary endpoints) upon intraperitoneal administration of MOC31PE in patients with PM-CRC undergoing CRS-HIPEC with Mitomycin C. Fifteen patients received the study drug at four dose levels (3+3+3+6), administered intraperitoneally as a single dose the day after CRS-HIPEC.
RESULTS: No dose-limiting toxicity was observed, and the maximum tolerated dose was not reached. There was negligible systemic absorption of the study drug. Drug concentrations in peritoneal fluid samples were in the cytotoxic range and increased in a dose-dependent manner. MOC31PE recovered from peritoneal cavity retained its cytotoxic activity in cell-based assays. All patients developed neutralizing antibodies.
CONCLUSIONS: Intraperitoneal administration of MOC31PE was safe and well tolerated, and combined with low systemic uptake, MOC31PE seems ideal for local intraperitoneal treatment. The drug will be further evaluated in an ongoing phase II expansion cohort.
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