Epirubicin plus docetaxel in metastatic breast cancer: escalating dose does not improve efficacy. A phase II study.
BACKGROUND
The combination of anthracyclines and docetaxel have demonstrated a significant activity in metastatic breast cancer (MBC) as first-line chemotherapy. In a previous multicenter phase I study, we recommended two schedules of epirubicin-docetaxel combination for MBC: 1) epirubicin 75 mg/m2, docetaxel 80 mg/m2 every 3 weeks without G-CSF; 2) epirubicin 90 mg/m2 plus docetaxel 90 mg/m2 every 3 weeks, with G-CSF support.


METHODS
Twenty-five advanced breast cancer patients were treated with epirubicin 90 mg/m2 plus docetaxel 90 mg/m2 every 3 weeks, with prophylactic G-CSF.


RESULTS
The main toxicity was grade 3-4 neutropenia (41% of cycles) despite the use of G-CSF; febrile neutropenia was observed in 14% of cycles necessitating a dose reduction of both drugs in 30% of patients. Response was observed in 79% of patients: 21% complete responses and 58% partial responses. The median response duration was 10 months (range: 3-16). The median time to progression was 11 months. The overall 3-year survival was 49.7%.


CONCLUSIONS
The antitumor activity observed in this series was comparable with that seen in other studies of taxane/anthracycline combinations. The degree of myelosuppression was severe, even though G-CSF was administered as a prophylactic. We recommend a lower dose of both drugs as reported by other authors.
Division of Medical Oncology, Regina Elena National Cancer Institute, Rome, Italy. alessandra.fabi@virgilio.it
Alessandra
A
Fabi
Paola
P
Papaldo
Maria Simona
MS
Pino
Gianluigi
G
Ferretti
Paolo
P
Carlini
Umberto
U
Pacetti
Serena
S
Di Cosimo
Chiara
C
Nardoni
Diana
D
Giannarelli
Italo
I
Sacchi
Francesco
F
Cognetti
D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000473:pathology; D000077143:Docetaxel; D004334:Drug Administration Schedule; D015251:Epirubicin / Q000008:administration & dosage / Q000009:adverse effects; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000008:administration & dosage; D006801:Humans; D008875:Middle Aged; D009362:Neoplasm Metastasis; D043823:Taxoids / Q000008:administration & dosage / Q000009:adverse effects
D043823:Taxoids; D016179:Granulocyte Colony-Stimulating Factor; D000077143:Docetaxel; D015251:Epirubicin