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Hepatoprotective effect of N-acetylcysteine in trabectedin-induced liver toxicity in patients with advanced soft tissue sarcoma.

PURPOSE: Trabectedin is one of the few active agents in soft tissue sarcoma (STS) but hepatotoxicity is frequent and represents a dose-limiting factor. Protective strategies aiming at counteracting this important side effect have a crucial clinical impact. Due to its antioxidant properties, N-acetylcysteine (NAC) has a recognized hepatoprotective effect and this provides the rationale for testing NAC in the management of trabectedin-induced hepatotoxicity.

METHODS: Patients with recurrent or metastatic soft tissue sarcoma, consecutively observed at our institution, who were considered eligible to trabectedin, received concomitant NAC if they had impaired hepatic or renal function at baseline or developed hepatotoxicity during treatment. The study aim was to retrospectively explore trabectedin administration in terms of number of cycles, mean dose, and dose intensity (DI) in patients who received NAC as compared with those who did not. Secondary end points were progression-free survival (PFS) and overall survival (OS).

RESULTS: A total number of 18 patients were enrolled in this study. Nine received NAC and nine did not. The median number of administered trabectedin cycles, mean trabectedin dose/cycles, and median DI was comparable in the two groups (p = 0.450, p = 0.534, and p = 0.450, respectively). The PFS and OS curves overlapped.

CONCLUSION: This explorative study suggests that NAC can have a hepatoprotective activity in patients receiving trabectedin allowing to maintain an adequate dose intensity and continuative administration in patients with impaired liver and renal function or developing treatment-induced hepatotoxicity. A prospective randomized trial is warranted.

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