Maintenance Versus Observation After 6 Cycles of Gemcitabine Plus Paclitaxel in Pts With Advanced Breast Cancer

The recruitment status of this study is unknown because the information has not been verified recently.
Verified November 2010 by Samsung Medical Center.
Recruitment status was  Active, not recruiting
Sponsor:
Collaborator:
Korean Cancer Study Group
Information provided by:
Samsung Medical Center
ClinicalTrials.gov Identifier:
NCT00561119
First received: November 18, 2007
Last updated: November 8, 2010
Last verified: November 2010
  Purpose

The primary goal of therapy in patients with metastatic breast cancer is palliation and prolongation of life with quality. Although there are no randomized trials comparing chemotherapy with supportive care in women with metastatic breast cancer, chemotherapy clearly provides a survival benefit in metastatic breast cancer. Due to diagnosis at earlier phases of metastatic disease and more effective therapies, the median survival of patients treated with modern taxane-based chemotherapy is now reaching approximately 2 years. The duration of chemotherapy in patients responding or stable disease remains controversial, since quality of life is not usually adversely affected and may even be improved in many patients receiving cytotoxic chemotherapy. In addition, many commonly used chemotherapeutic agents are not limited by cumulative toxicity in metastatic breast cancer patients. Several studies investigated the role of maintenance chemotherapy suggest that maintenance chemotherapy is associated with superior time to progression but no survival gain. However, these randomized trials did not incorporate taxane-based chemotherapeutic regimens, the new standard of care in metastatic breast cancer patients these days. A 1998 metaanalysis of 1,986 patients randomly assigned between combination chemotherapy and single-agent therapy in metastatic breast cancer patients demonstrated a survival advantage to combination chemotherapy, with a hazard ratio of 0.82 (range, 0.75 to 0.90). Although there are several randomized trials showing negative results for survival gain in patients who received maintenance chemotherapy, the role of maintenance chemotherapy with newer agents, such as docetaxel or paclitaxel, have not been established yet. Although Italian MANTA trial demonstrated no difference in PFS or survival between the two arms, their metaanalysis advocated survival benefit of maintenance therapy. Since gemcitabine/paclitaxel (GP) combination chemotherapy is one of the two regimens which showed definite survival gain with favorable toxicity from a randomized trial, we plan to randomize patients who responded to six cycles of GP induction chemotherapy to receive additional maintenance GP chemotherapy until disease progression versus observation. We hypothesize that patients who receive maintenance GP chemotherapy will do better in terms of progression free survival.


Condition Intervention Phase
Advanced Breast Cancer
Drug: gemcitabine , paclitaxel
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Phase III, Multicenter, Randomized Trial of Maintenance Versus Observation After Achieving Clinical Response in Pts With Metastatic or Recurrent Breast Cancer Who Received 6 Cycles of Gemcitabine Plus Paclitaxel(GP) as 1st-line Chemotherapy

Resource links provided by NLM:


Further study details as provided by Samsung Medical Center:

Primary Outcome Measures:
  • Progression free survival [ Time Frame: approximately 4 years ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • a) overall survival b) quality of life c) toxicity of GP chemotherapy d) duration of response [ Time Frame: approximately 4 years ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 326
Study Start Date: May 2007
Estimated Study Completion Date: December 2011
Estimated Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
No Intervention: Arm 1
Observation after 6 cycles of gemcitabine plus paclitaxel till progression
Drug: gemcitabine , paclitaxel

Gemcitabine 1250 mg/m2 i.v. Day 1 & 8

Paclitaxel 175 mg/m2 i.v. day 1

repeat every 3 weeks

Experimental: Arm 2
Maintenance chemotherapy with gemcitabine plus paclitaxel after 6 cycles of gemcitabine plus paclitaxel till progression
Drug: gemcitabine , paclitaxel

Gemcitabine 1250 mg/m2 i.v. Day 1 & 8

Paclitaxel 175 mg/m2 i.v. day 1

repeat every 3 weeks


  Hide Detailed Description

Detailed Description:

The primary goal of therapy in patients with metastatic breast cancer is palliation and prolongation of life with quality, because many if not most patients with metastatic breast cancer ultimately die of their disease. Although there are no randomized trials comparing chemotherapy with supportive care in women with metastatic breast cancer, chemotherapy clearly provides a survival benefit in early breast cancer and produces tumor shrinkage in metastatic disease. Institutional databases show an improvement in the survival of patients with metastatic disease over the past two decades, which may be due to diagnosis at earlier phases of metastatic disease and more effective therapies. The median survival of patients treated with modern taxane-based chemotherapy is now reaching approximately 2 years.

The duration of chemotherapy in patients responding or stable disease remains controversial, since quality of life is not usually adversely affected and may even be improved in many patients receiving cytotoxic chemotherapy. In addition, many commonly used chemotherapeutic agents are not limited by cumulative toxicity in metastatic breast cancer patients. Several trials have reported that continuous therapy generally prolonged the duration of remission, but the effect on survival and quality of life were less consistent.

Coates et al compared continuous therapy with AC or CMF with intermittent therapy using 3 cycles of the same regimen with reinstitution of therapy at the time of disease progression. Patients receiving continuous therapy had superior response rates, time to progression, and better quality of life, but no improvement in overall survival in this trial. A similar trial by the Peidmont Oncology Association randomly assigned patients who had responding or stable disease after six cycles of CAF to either CMF or observation, followed by reinstitution of CMF at disease progression . Although time to progression was more than twice as long for patients on continuous therapy than for those with interrupted treatment, overall survival was similar. Falkson et al randomly assigned 141 patients whose measurable disease showed a complete response after 6 cycles of CAF to receive either chemohormonal therapy or observation and found no difference in overall survival despite of prolongation of time to progression in treatment arm . In summary, these data suggest that maintenance chemotherapy is associated with superior time to progression but no survival gain. However, these randomized trials did not incorporate taxane-based chemotherapeutic regimens, the new standard of care in metastatic breast cancer patients these days.

In the 10 years since their initial licensing in Europe, the taxanes, paclitaxel and docetaxel, have emerged as critical drugs in the treatment of metastatic breast cancer patients. In TAX 303 trial, patients with prior alkylating agent exposure were randomly assigned to receive either docetaxel, 100 mg/m2, or doxorubicin, 75 mg/m2, every 3 weeks. Docetaxel produced a superior response rate (48% versus 33%, P=.008) and time to treatment failure. In addition, docetaxel was less marrow suppressive, with statistically significantly lower rates of thrombocytopenia, anemia, transfusions of blood and platelets, and neutropenic fever. Paclitaxel has been compared with doxorubicin in two randomized trials. In a European Organization for Research and Treatment of Cancer study, paclitaxel (200mg/m2 administered in a 3-hour infusion) was inferior to doxorubicin . In an Eastern Cooperative Oncology Group (ECOG) trial, 24-hour paclitaxel and doxorubicin produced equivalent results . Paclitaxel has also been shown to be equivalent to CMFP (cyclophosphamide, methotrexate, fluorouracil, prednisone) chemotherapy as first-line chemotherapy for metastatic breast cancer patients .

The survival advantage of combination chemotherapy has not been firmly established in breast cancer patients yet. No trial has shown a convincing survival advantage from combination therapy over single agents given in sequence. However, all published trials have been criticized for being underpowered and unable to demonstrate survival differences as high as 20% . A 1998 metaanalysis of 1,986 patients randomly assigned between combination chemotherapy and single-agent therapy in metastatic breast cancer patients demonstrated a survival advantage to combination chemotherapy, with a hazard ratio of 0.82 (range, 0.75 to 0.90). Two recently published studies, capecitabine and docetaxel versus docetaxel alone and paclitaxel and gemcitabine versus paclitaxel alone , have shown significant survival advantages of combination chemotherapy.

In the capecitabine/docetaxel study, 511 patients with measurable metastatic breast cancer who had received a prior anthracycline were randomly assigned to receive either docetaxel and oral capecitabine or docetaxel alone [16]. The combination of docetaxel and capecitabine demonstrated a higher response rate (42% vs 30%, P=.006), longer time to progression (6.1 vs 4.2 months, P=.0001), and longer overall survival (14.5 vs 11.5 months, P=.0126). The gemcitabine/paclitaxel study randomized 529 women with chemo-naïve, measurable metastatic breast cancer to receive either paclitaxel (175 mg/m2 over 3 hours every 3 weeks) and gemcitabine (1,250 mg/m2 over 30 minutes, on days 1 and 8 every 3 weeks), or paclitaxel (175 mg/m2 over 3 hours every 3 weeks) alone. The combination arm showed higher response rates (41% vs 22%, P<.0001), longer time to progression (5.2 vs 2.9 months, P<.0001), and longer survival (18.5 vs 15.8 months, P=.018).

At the ASCO meeting 2005, Chan and colleagues reported the results of a European phase III study comparing gemcitabine/docetaxel versus capecitabine/docetaxel for anthracycline-pretreated metastatic breast cancer patients . 305 patients were randomized to receive gemcitabine/docetaxel over capecitabine/docetaxel and there were no significant difference in response rate, PFS, or survival between the two arms. However, gemcitabine/docetaxel had a better risk-benefit profile in terms of less drug-related discontinuation, less gastrointestinal toxicity, and less skin toxicities.

Although there are several randomized trials showing negative results for survival gain in patients who received maintenance chemotherapy, the role of maintenance chemotherapy with newer agents, such as docetaxel or paclitaxel, have not been established yet. The Italian MANTA trial has registered 451 metastatic breast cancer patients to receive induction chemotherapy with epirubicin or doxorubicin/paclitaxel and further randomized 253 responders (CR, PR, SD) to receive maintenance therapy with paclitaxel or observation . Although this trial demonstrated no difference in PFS or survival between the two arms, their metaanalysis advocated survival benefit of maintenance therapy. Since gemcitabine/paclitaxel (GP) combination chemotherapy is one of the two regimens which showed definite survival gain from a randomized trial, we plan to randomize patients who responded to six cycles of GP induction chemotherapy to receive additional maintenance GP chemotherapy until disease progression versus observation. We hypothesize that patients who receive maintenance GT chemotherapy will do better in terms of progression free survival.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria

  • Histologically Confirmed Metastatic, or Recurrent Breast Cancer
  • Age over 18 Years
  • ECOG Performance Status 0-2
  • Premenopausal or Postmenopausal Breast Cancer Patients With Measurable or Non-Measurable Lesions, Who Are Candidates for Chemotherapy
  • Life Expectancy ≥ 3 Months
  • Patients May Have Received Prior Neoadjuvant or Adjuvant Taxane Regimen as Long as it Has Been 12 Months Since Completion of Regimen.
  • Patients Either May or May Not Have a Prior Anthracycline Containing Regimen.
  • Prior Hormonal Therapy as a Treatment of Metastatic Disease is Allowed. But Antitumoral Hormonal Therapy Must be Terminated Prior to Enrollment(up to the Date of Randomization)
  • Prior Radiation Therapy Allowed as Long as < 25% of the Bone Marrow Has Been Treated,and the Patients Must Have Recovered From the Acute Toxic Effects of the Treatment Prior to Study Enrollment.Prior Radiation to the Whole Pelvis is Not Allowed. Prior Radiotherapy Must be Completed 4 Weeks Before Study Entry.
  • Adequate Bone Marrow Function (≥ ANC 1,500/ul, ≥ Platelet 100,000/ul, ≥ Hemoglobin 9.0 g/dl)
  • Adequate Renal Function (≤ Serum Creatinine 1.5 mg/dl or CCr ≥ 50 ml/Min)
  • Adequate Liver Function (≤ Serum Bilirubin 1.5 mg/dl, ≤ AST/ALT x 3 Upper Normal Limit)
  • No Prior History of Chemotherapy for Metastatic, Recurrent Breast Cancer
  • Written Informed consent.

Exclusion Criteria

  • Serious Uncontrolled Intercurrent Infections
  • Serious Intercurrent Medical or Psychiatric Illness, Including Active Cardiac Disease
  • Pregnancy or Breast Feeding
  • Second Primary Malignancy(Except Cancer of Cervix or Skin or Other Malignancy Treated at Least 5 Years Previously With no Evidence of Recurrence)
  • Documented Parenchymal or Leptomeningeal Brain Metastasis
  • Peripheral Neuropathy ≥ Grade 2
  • Prior Treatment With Gemcitabine Will Not be Allowed.
  • HER-2 Overexpressing Breast Cancer and Concomitant Trastuzumab Treatment is Not Allowed
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00561119

Locations
Korea, Republic of
Hanlym University Hospital
Anyang, Kyeongki-Do, Korea, Republic of, 431-070
Bundang Seoul National University Hospital
Bundang, Kyeongki-Do, Korea, Republic of, 463-707
Ajou University University Hospital
Suwon, Kyungki-Do, Korea, Republic of
Yeungnam University Hospital
Kyungsan, Kyungsangbuk-Do, Korea, Republic of
Daegu Patima Hospital
Daegu, Korea, Republic of, 701-600
Inha University School of Medicine
Inchon, Korea, Republic of, 400-711
Soonchunhyang University Hospital
Seoul, Korea, Republic of
Seoul National University Hospital
Seoul, Korea, Republic of, 110-744
Ewha University Hospital
Seoul, Korea, Republic of, 911-1
National Cancer Center
Seoul, Korea, Republic of, 140-320
Kunkuk University Hospital
Seoul, Korea, Republic of, 143-729
Asan Medical Center
Seoul, Korea, Republic of
Samsung Medical Center
Seoul, Korea, Republic of, 135-710
Yonsei University Hospital
Seoul, Korea, Republic of, 120-752
Ulsan University Hospital
Ulsan, Korea, Republic of, 682-714
Sponsors and Collaborators
Samsung Medical Center
Korean Cancer Study Group
Investigators
Principal Investigator: Young-Hyuck Im, M.D., Ph.D Samsung Medical Center
  More Information

No publications provided by Samsung Medical Center

Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Young-Hyuck Im, Chair of Breast Cancer subcommitte, KCSG, Korea Cancer Study Group
ClinicalTrials.gov Identifier: NCT00561119     History of Changes
Other Study ID Numbers: 2007-03-003
Study First Received: November 18, 2007
Last Updated: November 8, 2010
Health Authority: South Korea: Institutional Review Board

Keywords provided by Samsung Medical Center:
maintenance chemotherapy
metastatic or recurrent breast cancer
gemcitabine
paclitaxel(GP)

Additional relevant MeSH terms:
Breast Neoplasms
Neoplasms by Site
Neoplasms
Breast Diseases
Skin Diseases
Paclitaxel
Gemcitabine
Antineoplastic Agents, Phytogenic
Antineoplastic Agents
Therapeutic Uses
Pharmacologic Actions
Tubulin Modulators
Antimitotic Agents
Mitosis Modulators
Molecular Mechanisms of Pharmacological Action
Antimetabolites, Antineoplastic
Antimetabolites
Antiviral Agents
Anti-Infective Agents
Enzyme Inhibitors
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs
Radiation-Sensitizing Agents

ClinicalTrials.gov processed this record on October 01, 2014