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© 1999 American Society for Clinical Oncology First-Line Chemotherapy With Epirubicin, Paclitaxel, and Carboplatin for Advanced Ovarian Cancer: A Phase I/II Study of the Arbeitsgemeinschaft Gynäkologische Onkologie Ovarian Cancer Study GroupFrom the Frauenklinik St. Vincentius Krankenhaus, Karlsruhe; Frauenklinik Medizinische Hochschule, Hannover; Universitätsfrauenklinik, Freiburg; Universitätsfrauenklinik München, Grosshadern; Universitätsfrauenklinik, Dresden; Universitätsfrauenklinik München rechts der Isar; Frauenklinik Klinikum Stralsund; and Universitäts-frauenklinik, Kiel, Germany. Address reprint requests to Andreas du Bois, MD, PhD, AGO study secretary, St Vincentius Khs, Suedendstr 32, D-76,137 Karlsruhe, Germany; Email dubois{at}klinik.uni-karlsruhe.de
PURPOSE: Despite the progress that has been achieved over the years, survival rates in patients with advanced ovarian cancer are still disappointing. New methods to improve the efficiency of first-line chemotherapy are warranted. One method to improve results is to add more noncross-resistant drugs to platinum-paclitaxel combination regimens. Anthracyclines are among the candidates for incorporation as the "third drug" into first-line regimens for advanced ovarian cancer. PATIENTS AND METHODS: We performed a phase I/II trial with escalating doses of epirubicin (60, 75, and 90 mg/m2) combined with fixed doses of paclitaxel and carboplatin in 27 previously untreated patients with advanced gynecologic malignancies. RESULTS: Dose-limiting toxicity occurred at dose level 2 (75 mg/m2 epirubicin) and consisted of myelosuppression (neutropenia, thrombocytopenia). No dose-limiting, nonhematologic toxicities were observed. The maximum tolerable dose was epirubicin 60 mg/m2 (E) combined with a 3-hour infusion of paclitaxel 175 mg/m2 (T) and carboplatin AUC 5 (Carbo). Preliminary analysis indicated promising activity against ovarian cancer. CONCLUSION: The three-drug combination ET-Carbo, given according to the outlined dose and schedule, should be considered for further phase III evaluation. A randomized German-French intergroup trial comparing ET-Carbo with carboplatin-paclitaxel has already been initiated.
SINCE THE PUBLICATION OF Gynecologic Oncology Group (GOG) protocol no. 111 in early 1996,1 the combination regimen of cisplatin and paclitaxel has been adopted as a new standard first-line treatment for advanced ovarian cancer. Several attempts have been made to optimize this regimen, which consists of cisplatin 75 mg/m2 and paclitaxel 135 mg/m2 given as a 24-hour infusion. A Canadian-European intergroup study that used paclitaxel 175 mg/m2 given over 3 hours in combination with cisplatin 75 mg/m2 has principally confirmed the results of GOG no. 111 by showing a superior effectiveness of the new combination when compared with the old standard regimen of cisplatin and cyclophosphamide.2 Further efforts were undertaken to amend the armamentarium of platinum-taxan combinations for the treatment of ovarian cancer by substituting cisplatin with carboplatin. At least three prospectively randomized trials comparing cisplatin/paclitaxel with carboplatin/paclitaxel were initiated, one in the United States (GOG no. 158) and two in Europe (Arbeitsgemeinschaft Gynäkologische Onkologie [AGO] protocol OVAR-3 and a Dutch-Danish study). Interim analysis of the latter two studies suggested similar efficacy when carboplatin/paclitaxel was compared with cisplatin/paclitaxel,3,4 although long-term survival data are still needed. One option for achieving further progress in the first-line treatment of advanced ovarian cancer might be the addition of noncross-resistant drugs to the two-drug combination of platinum and paclitaxel. Anthracyclines are among the candidates for the "third drug." Three meta-analyses showed a survival benefit for platinum-anthracyclinebased combinations when compared with platinum-based combinations without anthracyclines.5-7 Furthermore, both doxorubicin (as a liposomal formulation) and epirubicin, a doxorubicin analog, have shown activity as second-line treatment even after prior platinum (and in some patients, paclitaxel) first-line chemotherapy.8,9 In our phase I/II study, we evaluated the maximum-tolerated dose, safety, and feasibility of a three-drug regimen containing an anthracycline (ie, epirubicin) in combination with carboplatin and paclitaxel in previously untreated patients with gynecologic cancers. Epirubicin was selected among the available anthracyclines because it has shown less cardiotoxicity than doxorubicin when combined with cisplatin in a randomized trial.10 The same observations have been reported when epirubicin or doxorubicin were combined with paclitaxel in phase II breast cancer trials.11-14
This study was conducted according to the Good Clinical Practice guidelines. Approval from ethics committees was gained at every institution, and each patient gave written informed consent. Inclusion criteria were histologically confirmed epithelial ovarian cancer, primary peritoneal adenocarcinoma, or papillary-serous endometrial carcinoma, age of consent, Eastern Cooperative Oncology Group performance status of 2 or better, adequate bone-marrow function (absolute neutrophil count 1.5 x 109/L and platelet count 100 x 109/L), and adequate renal and hepatic function (creatinine and bilirubin 1.25 times the upper limit of normal). Patients were ineligible if they had prior malignancies (excluding nonmelanomatous skin cancer), prior chemotherapy or radiotherapy, a history of atrial or ventricular arrhythmias, congestive heart failure or a history of myocardial infarction, pre-existing motor or sensory neurotoxicity, active infection, bowel obstruction, or mental disorders. Chemotherapy consisted of escalating doses of epirubicin, starting at 60 mg/m2 in dose level 1, with an escalation of 15 mg/m2 in each higher dose level (ie, 60, 75, and 90 mg/m2), followed by fixed doses of paclitaxel 175 mg/m2 given as a 3-hour infusion and carboplatin AUC 5. All three drugs were administered on day 1, one directly after another, and cycles were repeated every 21 days. This sequence was chosen because epirubicin preceding paclitaxel has shown excellent tolerability (especially no cardiotoxicity) in our phase I/II breast cancer trial,13 and carboplatin given after paclitaxel has shown better tolerability than vice versa in our phase I/II ovarian trial.17 Carboplatin dose was calculated as AUC according to the Calvert formula.15 The glomerular filtration rate was estimated according to the Jeliffe formula.16 Epirubicin was diluted in 250 mL of glucose 5% and infused over the course of 30 minutes. Paclitaxel was diluted in 500 mL of 0.9% saline and infused over the course of 3 hours. Carboplatin was diluted in 500 mL of glucose 5% and infused over the course of 30 to 60 minutes. The premedication schedule had been evaluated before in our phase I/II trial with carboplatin-paclitaxel17 and consisted of single-dose dexamethasone 20 mg, ondansetron 8 mg, clemastine 2 mg, and ranitidine 50 mg given directly before chemotherapy. Blood counts were monitored during each course, once in the first week and twice in the second and third weeks. Electrocardiogram tracing was performed before study entry and after treatment completion. Toxicity was graded according to the National Cancer Institute Common Toxicity Criteria.18 No primary granulocyte colony-stimulating factor (G-CSF) prophylaxis was allowed. The maximum-tolerated dose (MTD) was defined as one dose level below the dose level in which at least two of eight patients developed dose-limiting toxicity. Dose-limiting toxicity (DLT) was defined as (1) absolute neutrophil count (ANC) less than 0.5 x 109/L lasting for more than 7 days, (2) ANC less than 0.1 x 109/L lasting for more than 3 days, (3) febrile neutropenia, (4) grade 4 thrombocytopenia, and (5) clinically relevant nonhematologic toxicity of grade 3 or higher. Re-treatment was delayed until thrombocyte counts had reached 100 x 109/L and the ANC was 1.5 x 109/L or higher. Patients were taken out of the study if the treatment interval exceeded 42 days. Dose-limiting toxicity was evaluated over the first three consecutive courses per patient. Patients were enrolled in the next higher dose level only in the absence of DLT within the first course in at least seven of eight patients in the preceding dose level. After the MTD level was defined, at least eight additional patients had to be treated for confirmation at this dose level. Maximum-tolerated dose was only accepted if fewer than four of 16 patients experienced DLT within the first three consecutive courses. Treatment continued in patients who experienced DLT, but doses had to be reduced to the next lower dose level in subsequent courses. Dose reductions for patients treated at level 1 were epirubicin 45 mg/m2 (level -1) and cessation of epirubicin (level -2). Paclitaxel and carboplatin doses were kept unchanged during the course of the whole study. Bidimensionally measurable tumors were not mandatory for inclusion, but patients with ovarian cancer who presented with measurable tumors were evaluated for response. Gynecologic clinical examinations were performed before each course. Imaging techniques appropriate for tumor measurement were performed every other course. Responses that were primarily detected by clinical examination or ultrasound had to be verified by computed tomographic scan. Response was defined according to the International Union Against Cancer's criteria.19
From June 1997 to October 1997, twenty-seven patients were recruited. One patient was found to be ineligible because she had received one prior course of chemotherapy consisting of carboplatin, paclitaxel, and ifosfamide. The remaining 26 patients received 140 chemotherapy courses. Patient characteristics were well balanced in all dose levels (Table 1). The majority of patients had ovarian cancer, the median age was 58 years, and the median glomerular filtration rate was 83 mL/min (range, 55 to 115 mL/min). Eighteen of the 21 patients with ovarian cancer were assessable for efficacy (two patients received only one course and one patient was not evaluated for response); all courses were assessable for toxicity.
Dose Escalation and Dose-Limiting Toxicity
Toxicity
Actual Dose
Efficacy
Despite the progress that had been achieved by the incorporation of paclitaxel into first-line treatment of advanced ovarian cancer, survival rates are still somewhat disappointing. Eventually, the majority of patients will develop secondary drug-resistant recurrences and die of their disease. Therefore, further efforts to improve efficacy of first-line chemotherapy in ovarian cancer are clearly warranted. One method to improve results is the addition of other drugs that are regarded as not completely cross-resistant to platinum-paclitaxel combination regimens. Among other drugs, anthracyclines are candidates for incorporation as the "third drug" into first-line regimens for advanced ovarian cancer. Results from meta-analyses have suggested that anthracyclines, when added to platinum-cyclophosphamide regimens, offer some benefit in regard to long-term survival.5-7 Today, it is unknown whether this additional impact of anthracyclines is maintained when anthracycline is combined with the new standard regimen of platinum and paclitaxel. This study was undertaken to develop a feasible three-drug regimen that would offer the opportunity to compare platinum-paclitaxel with a three-drug combination of platinum plus paclitaxel plus an anthracycline in future randomized phase III trials. These studies should help to clarify the role of anthracyclines in ovarian cancer. At least nine groups (including the AGO group) have evaluated anthracycline-containing three-drug regimens for the treatment of gynecologic malignancies.20-27 Three groups used doxorubicin and six groups chose epirubicin as the anthracycline. Epirubicin was combined with cisplatin and paclitaxel in three studies and with paclitaxel and carboplatin in three other studies (Table 4). An Italian group reached MTD with epirubicin 75 mg/m2 in combination with paclitaxel 175 mg/m2 and carboplatin AUC 6.26 This group chose 4-week intervals; in contrast, we used 3-week intervals and thus achieved a slightly higher dose-intensity, although we used lower single doses of epirubicin (60 mg/m2) and carboplatin (AUC 5) in each course. The second trial, which was presented as an abstract by a Scandinavian group, used the same paclitaxel dose as we did but a slightly higher epirubicin dose of 75 mg/m2.27 These additional 15 mg/m2 of the anthracycline were traded for a lower carboplatin dose of AUC 4. Neither the use of cisplatin instead of carboplatin23-25 nor the use of doxorubicin instead of epirubicin20-22 resulted in higher anthracycline doses.
The major dose-limiting toxicity reported from all studies was myelosuppression (mainly neutropenia). Granulocyte colony-stimulating factor seemed to have only minor impact on the maximum-tolerated doses. Six groups used prophylactic G-CSF treatment in all patients, but maximum-tolerated doses did not exceed those reported from studies in which G-CSF was not used (Table 4). This observation corresponds to an earlier report indicating that G-CSF did not allow dose escalation in carboplatin-paclitaxel combination chemotherapy.28 Overall, maximum-tolerated doses were very similar in all studies that used paclitaxel 135 to 175 mg/m2 given as 3-hour infusions. The exception was one study that used 24-hour infusions of paclitaxel,20 cisplatin 50 to 75 mg/m2 or carboplatin AUC 5 to 7, and doxorubicin 30 to 50 mg/m2 or epirubicin 5075 mg/m2. Only one study25 reported higher doses for all three drugs, but a substantial proportion of patients experienced nonhematologic toxicities, including cardiotoxicity. In contrast, no severe nonhematologic toxicities were observed in our trial, making the present maximum-tolerable dose feasible for phase III studies. Some groups, as well as this study, have reported preliminary efficacy data for the three-drug regimens consisting of taxanes, platinum, and an anthracycline.20,21,23,24,26,27 Overall response rates range from 63% to 100% of assessable patients, with complete response rates of 40% to 89%. These data should be interpreted very cautiously, because each study included only few patients and response rates are based on a total sample of only 135 patients enrolled onto seven phase I/II and phase II trials. In addition, two of these trials included patients with gynecologic malignancies other than epithelial ovarian cancer, thereby making results incomparable. Nevertheless, the anthracycline-paclitaxel-platinum combination showed promising activity against ovarian cancer; therefore, further evaluation in phase III trials is justified. On the basis of results of our phase I/II trial, a German-French randomized phase III intergroup trial was initiated in November 1997. This trial is comparing epirubicin-paclitaxel-carboplatin with carboplatin-paclitaxel. By November 1998, 600 of the 800 planned patients had already entered onto this trial. Investigators expect to complete recruitment in 1999.
We thank the study secretaries (T. Hirsjärvi, G. Elser, and M. Polzin) for help with the data management and P. Schantl, C. Biberger, and B. Kirchherr for outfield data monitoring. Study medication was provided by Bristol-Myers-Squibb (paclitaxel and carboplatin) and Pharmacia-Upjohn (epirubicin).
1. McGuire WP, Hoskins WJ, Brady MF, et al: Cyclophosphamide and cisplatin compared with paclitaxel and cisplatin in patients with stage III and stage IV ovarian cancer. N Engl J Med 334:1-6, 1996 2. Stuart G, Bertelsen K, Mangioni C, et al: Updated analysis shows highly significant improved overall survival (OS) for cisplatin-paclitaxel as first-line treatment of advanced ovarian cancer: Mature results of the EORTC-GCCG, NOCOVA, NCIC CTG and Scottishintergroup trial. Proc Am Soc Clin Oncol 17:361a, 1998 (abstr 1394) 3. du Bois A, Richter B, Warm M, et al: Cisplatin/paclitaxel vs carboplatin/paclitaxel as 1st-line treatment in ovarian cancer. Proc Am Soc Clin Oncol 17:361a, 1998 (abstr 1395) 4. Neijt JP, Hansen M, Hansen SW, et al: Randomized phase III study in previously untreated epithelial ovarian cancer FIGO stage IIB, IIC, III, IV, comparing paclitaxel-cisplatin and paclitaxel-carboplatin. Proc Am Soc Clin Oncol 16:352a, 1997 (abstr 1259) 5. Ovarian Cancer Meta-Analysis Project: Cyclophosphamide, doxorubicin, and cisplatin chemotherapy for ovarian carcinoma: A meta-analysis. J Clin Oncol 9:1668-1674, 1991 6. A'Hern RP Gore ME: Impact of doxorubicin on survival in advanced ovarian cancer. J Clin Oncol 45:726-732, 1995 7. Fanning J, Bennett TZ, Hilgers RD: Metaanalysis of cisplatin, doxorubicin, and cyclophosphamide versus cisplatin and cyclophosphamide chemotherapy of ovarian carcinoma. Obstet Gynecol 80:954-960, 1992[Medline]
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Muggia FM, Hainsworth JD, Jeffers S, et al: Phase II study of liposomal doxorubicin in refractory ovarian cancer: Antitumor activity and toxicity modification by liposomal encapsulation. J Clin Oncol 15:987-993, 1997 9. Vermorken JB, Kobierska A, van der Burg MEL, et al: High-dose epirubicin in platinum-pretreated patients with ovarian carcinoma: The EORTC-GCCG experience. Eur J Gynaec Oncol 16:433-438, 1995 10. Homesley HD, Harry DS, O'Toole RVet al: Randomized comparison of cisplatin plus epirubicin or doxorubicin for advanced epithelial ovarian carcinoma. Am J Clin Oncol 15:129-134, 1992[Medline]
11.
Gehl J, Boesgard M, Paaske T, et al: Combined doxorubicin and paclitaxel in advanced breast cancer: Effective and cardiotoxic. Ann Oncol 7:687-693, 1996 12. Gianni L, Munzone E, Capri G, et al: Paclitaxel by 3-hour infusion in combination with bolus doxorubicin in women with untreated metastatic breast cancer: High antitumor efficacy and cardiac effects in a dose-finding and sequence-finding study. J Clin Oncol 13:2688-2699, 1995[Abstract] 13. Lück HJ du Bois A Thomssen C, et al: Paclitaxel and epirubicin as first-line therapy for patients with metastatic breast cancer. Oncology 11:34-37, 1997 (suppl 3)
14.
Conte PF, Baldini E, Gennari A, et al: Dose-finding study and pharmacokinetics of epirubicin and paclitaxel over 3 hours: A regimen with high activity and low cardiotoxicity in advanced breast cancer. J Clin Oncol 15:2510-2517, 1997 15. Calvert AH, Newell DR, Gumbrell LA: Carboplatin dosage: Prospective evaluation of a simple formula based on renal function. J Clin Oncol 17:1748-1756, 1989 16. Jeliffe RW: Creatinine clearance: Bedside estimate. Ann Intern Med 79:604, 1973 (letter) 17. du Bois A, Lück HJ, Bauknecht T, et al: Phase I/II study of the combination of carboplatin and paclitaxel as first-line chemotherapy in patients with advanced epithelial ovarian cancer. Ann Oncol 8:355-361, 1997 18. National Cancer Institute common toxicity criteria, in Perry MC (ed): The Chemotherapy Source Book. Baltimore, MD, Williams & Wilkins, 1990, pp 1133-1140 19. Miller AB, Hoogstraten B, Staquet M, et al: Reporting results of cancer treatment. Cancer 47:207-214, 1981[Medline] 20. Naumann RW, Alvarez RD, Omura GA, et al: A phase I study of paclitaxel and cisplatin with escalating doses of doxorubicin in patients with previously untreated epithelial ovarian cancer. Proc Am Soc Clin Oncol 16:374a, 1997 (abstr 1333) 21. Hill ME, Moore J, Johnston SR, et al: G-CAT (G-CSF, cis/carboplatin, Adriamycin® and Taxol®) for advanced ovarian cancer: Active but toxic. Proc Am Soc Clin Oncol 16:371a, 1997 (abstr 1321) 22. Flemming GF, Fowler JM, Waggoner SE, et al: Phase I trial of escalating doses of paclitaxel (TAX) combined with fixed doses of cisplatin (CIS) and doxorubicin (DOX) in patients with advanced gynecologic malignancies: A Gynecologic Oncology Group (GOG) trial. Proc Am Soc Clin Oncol 17:361a, 1998 (abstr 1393) 23. Lissoni A, Sessa C, Gabriele A, et al: Cisplatin, epirubicin and paclitaxel in uterine adenocarcinoma. Proc Am Soc Clin Oncol 16: 373a, 1997 (abstr 1329) 24. Dimipoulos MA, Papadimitriou CA, Akrivos T, et al: Paclitaxel, cisplatin and epirubicin with G-CSF for newly diagnosed patients with epithelial ovarian cancer. Proc Am Soc Clin Oncol 16:369a, 1997 (abstr 1313) 25. Greggi S, Benedetti-Panici P, Amoroso M, et al: Phase I trial of dose-escalated epirubicin (E), and paclitaxel (T), in combination with cisplatin (P) + G-CSF in advanced ovarian cancer (AOC). Proc Am Soc Clin Oncol 17:366a, 1998 (abstr 1411) 26. Brunetti I, Tanganelli L, Romanini A, et al: Epidoxorubicin (EPIDOX), carboplatin (CBDCA) and paclitaxel (PTX) in advanced epithelial ovarian cancer (AEOC). Proc Am Soc Clin Oncol 17:350a, 1998 (abstr 1350) 27. Kristensen GB, Trope C: Carboplatinum, paclitaxel, and epirubicin combination as first-line chemotherapy in ovarian cancer. Gynecol Oncol 68:117, 1998 (abstr 184)
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Bookmann MA, McGuire WP III Kilpatrick D, et al: Carboplatin and paclitaxel in ovarian carcinoma: A phase I study of the Gynecologic Oncology Group. J Clin Oncol 14:1895-1902, 1996 Submitted June 26, 1998; accepted September 14, 1998.
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Copyright © 1999 by the American Society of Clinical Oncology, Online ISSN: 1527-7755. Print ISSN: 0732-183X
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