PURPOSE: Ten percent of U.S. patients with non-small cell lung cancer experience partial radiographic responses to erlotinib or gefitinib. Despite initial regressions, these patients develop acquired resistance to erlotinib or gefitinib. In these patients, we sought to assess changes in tumor metabolism and size after stopping and restarting erlotinib or gefitinib and to determine the effect of adding everolimus. EXPERIMENTAL DESIGN: Patients with non-small cell lung cancer and acquired resistance to erlotinib or gefitinib were eligible. Patients had 18-fluoro-2-deoxy-d-glucose-positron emission tomography/computed tomography and computed tomography scans at baseline, 3 weeks after stopping erlotinib or gefitinib, and 3 weeks after restarting erlotinib or gefitinib. Three weeks after restarting erlotinib or gefitinib, everolimus was added to treatment. RESULTS: Ten patients completed all four planned studies. Three weeks after stopping erlotinib or gefitinib, there was a median 18% increase in SUV(max) and 9% increase in tumor diameter. Three weeks after restarting erlotinib or gefitinib, there was a median 4% decrease in SUV(max) and 1% decrease in tumor diameter. No partial responses (0 of 10; 95% confidence interval, 0-31%) were seen with the addition of everolimus to erlotinib or gefitinib. CONCLUSIONS: In patients who develop acquired resistance, stopping erlotinib or gefitinib results in symptomatic progression, increase in SUV(max), and increase in tumor size. Symptoms improve and SUV(max) decreases after restarting erlotinib or gefitinib, suggesting that some tumor cells remain sensitive to epidermal growth factor receptor blockade. No responses were observed with combined everolimus and erlotinib or gefitinib. We recommend a randomized trial to assess the value of continuing erlotinib or gefitinib after development of acquired resistance.
PURPOSE: Ten percent of U.S. patients with non-small cell lung cancer experience partial radiographic responses to erlotinib or gefitinib. Despite initial regressions, these patients develop acquired resistance to erlotinib or gefitinib. In these patients, we sought to assess changes in tumor metabolism and size after stopping and restarting erlotinib or gefitinib and to determine the effect of adding everolimus. EXPERIMENTAL DESIGN:Patients with non-small cell lung cancer and acquired resistance to erlotinib or gefitinib were eligible. Patients had 18-fluoro-2-deoxy-d-glucose-positron emission tomography/computed tomography and computed tomography scans at baseline, 3 weeks after stopping erlotinib or gefitinib, and 3 weeks after restarting erlotinib or gefitinib. Three weeks after restarting erlotinib or gefitinib, everolimus was added to treatment. RESULTS: Ten patients completed all four planned studies. Three weeks after stopping erlotinib or gefitinib, there was a median 18% increase in SUV(max) and 9% increase in tumor diameter. Three weeks after restarting erlotinib or gefitinib, there was a median 4% decrease in SUV(max) and 1% decrease in tumor diameter. No partial responses (0 of 10; 95% confidence interval, 0-31%) were seen with the addition of everolimus to erlotinib or gefitinib. CONCLUSIONS: In patients who develop acquired resistance, stopping erlotinib or gefitinib results in symptomatic progression, increase in SUV(max), and increase in tumor size. Symptoms improve and SUV(max) decreases after restarting erlotinib or gefitinib, suggesting that some tumor cells remain sensitive to epidermal growth factor receptor blockade. No responses were observed with combined everolimus and erlotinib or gefitinib. We recommend a randomized trial to assess the value of continuing erlotinib or gefitinib after development of acquired resistance.
Authors: Alan P Venook; Maria E Arcila; Al B Benson; Donald A Berry; David Ross Camidge; Robert W Carlson; Toni K Choueiri; Valerie Guild; Gregory P Kalemkerian; Razelle Kurzrock; Christine M Lovly; Amy E McKee; Robert J Morgan; Anthony J Olszanski; Mary W Redman; Vered Stearns; Joan McClure; Marian L Birkeland Journal: J Natl Compr Canc Netw Date: 2014-11 Impact factor: 11.908
Authors: Mizuki Nishino; David M Jackman; Hiroto Hatabu; Pasi A Jänne; Bruce E Johnson; Annick D Van den Abbeele Journal: Acad Radiol Date: 2011-01-28 Impact factor: 3.173
Authors: Melissa L Johnson; Helena A Yu; Eric M Hart; Bing Bing Weitner; Alfred W Rademaker; Jyoti D Patel; Mark G Kris; Gregory J Riely Journal: J Clin Oncol Date: 2015-04-13 Impact factor: 44.544
Authors: Edward H Flach; Vito W Rebecca; Meenhard Herlyn; Keiran S M Smalley; Alexander R A Anderson Journal: Mol Pharm Date: 2011-11-08 Impact factor: 4.939
Authors: Mizuki Nishino; Stephanie Cardarella; Suzanne E Dahlberg; David M Jackman; Nikhil H Ramaiya; Hiroto Hatabu; Michael S Rabin; Pasi A Jänne; Bruce E Johnson Journal: Lung Cancer Date: 2012-12-14 Impact factor: 5.705