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Selective TACE with Irinotecan-loaded 40 μm Microspheres and FOLFIRI for Colorectal Liver Metastases: Phase I Dose Escalation Pharmacokinetic Study

Overview
Journal BMC Cancer
Publisher Biomed Central
Specialty Oncology
Date 2019 Aug 3
PMID 31370815
Citations 8
Authors
Affiliations
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Abstract

Background: Efficacy of treatments for colorectal liver metastases after failure of first-line chemotherapy is limited. The aim of this study was to prospectively evaluate the feasibility, tolerability, and pharmacokinetics of selective transarterial chemoembolization (TACE) with irinotecan-loaded 40 μm microspheres combined with systemic FOLFIRI for colorectal liver metastases refractory to oxaliplatin regimen.

Methods: The dose escalation study was conducted in three patient groups with different amounts of irinotecan loaded (50, 75 and 100 mg per mL-microspheres). Selective catheterization was performed to embolize subsegments or segments of located tumors using TACE navigation system. FOLFIRI was administrated 7 days after TACE. Plasma concentration was measured before and time points after administration.

Results: Nine patients successfully underwent a total of 22 TACE procedures. Dose-limiting toxicity did not appear at any level. The overall response rate was 55.6%. The median progression free and overall survival were 8.1 and 18.2 months, respectively. The AUC and C of plasma SN-38 per 1 mg injected irinotecan dose were significantly higher in irinotecan-loaded microspheres compared with FOLFIRI (P = 0.009 and P <  0.001, respectively).

Conclusion: Selective TACE using 40 μm irinotecan-loaded microspheres combined with systemic FOLFIRI was feasible and safe even when a high dose of irinotecan was loaded. Irinotecan-loaded microspheres resulted in a higher plasma concentration and AUC of SN-38 than treatment with FOLFIRI. Further large scale trials to evaluate the efficacy are mandatory.

Trial Registration: University Hospital Medical Information Network (UMIN) Clinical Trials Registry, Registration number; UMIN000015367 ; Registered date; 08,10,2014.

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