Pharmacokinetics and excretion of (14)C-lenvatinib in patients with advanced solid tumors or lymphomas.

Abstract

Lenvatinib is an orally available multi-targeted tyrosine kinase inhibitor with anti-angiogenic and antitumor activity. To get more insight into the disposition of lenvatinib, a mass balance study was performed in patients with advanced solid tumors. A single oral 24 mg (100 μCi) dose of (14)C-lenvatinib was administered to six patients, followed by collection of blood, plasma, urine and feces for 7 to 10 days. The collected material was analyzed for total radioactivity, unchanged lenvatinib and selected metabolites. The safety and antitumor effect of a daily oral dose of 24 mg non-labeled lenvatinib were assessed in the extension phase of the study. Peak plasma concentrations of lenvatinib and total radioactivity were reached 1.6 and 1.4 h after administration, respectively, and their terminal phase half-lifes were 34.5 and 17.8 h, respectively. Unchanged lenvatinib systemic exposure accounted for 60 % of the total radioactivity in plasma. Peak concentrations of the analyzed metabolite were over 700-fold lower than the peak plasma concentration of lenvatinib. Ten days after the initial dose, the geometric mean (± CV) recovery of administered dose was 89 % ±10 %, with 64 % ±11 % recovered in feces and 25 % ±18 % in urine. Unchanged lenvatinib in urine and feces accounted for 2.5 % ±68 % of the administered dose, indicating a major role of metabolism in the elimination of lenvatinib. In conclusion, lenvatinib is rapidly absorbed and extensively metabolized, with subsequent excretion in urine and, more predominantly, in feces. Additionally, lenvatinib showed acceptable safety and preliminary antitumor activity.

• Authors: Anne-Charlotte Dubbelman, Hilde Rosing, Cynthia Nijenhuis, Alwin D R Huitema, Marja Mergui-Roelvink, Anubha Gupta, David Verbel, Gary Thompson, Robert Shumaker, Jan H M Schellens, Jos H Beijnen
• Journal: Investigational new drugs (Invest New Drugs) Vol. 33 Issue 1 Pg. 233-40 (Feb 2015) ISSN: 1573-0646 [Electronic] United States
• PMID: 25377392 (Publication Type: Clinical Trial, Phase I, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antineoplastic Agents
• Carbon Radioisotopes
• Phenylurea Compounds
• Protein Kinase Inhibitors
• Quinolines
• lenvatinib

Topics

• Adult
• Antineoplastic Agents (adverse effects, pharmacokinetics, therapeutic use)
• Carbon Radioisotopes (blood, pharmacokinetics, urine)
• Feces (chemistry)
• Female
• Humans
• Male
• Middle Aged
• Neoplasms (drug therapy, metabolism)
• Phenylurea Compounds (adverse effects, pharmacokinetics, therapeutic use)
• Protein Kinase Inhibitors (adverse effects, pharmacokinetics, therapeutic use)
• Quinolines (adverse effects, pharmacokinetics, therapeutic use)
• Treatment Outcome