J Korean Surg Soc.  2010 Sep;79(3):173-179.

Response to Paclitaxel in Node-positive Triple Negative Breast Cancer

• Ryu DW
• Lee CH

Abstract

PURPOSE
Triple negative breast cancer (TNBC) has had poor prognosis compared with the luminal subtype. And there has been no benefit from doxorubicin. However, the addition of paclitaxel is known to improve both disease-free survival (DFS) and overall survival (OS). The aim of our study was to assess the effect of the addition of paclitaxel after adjuvant chemotherapy with doxorubicin plus cyclophosphamide in TNBC.
METHODS
We randomly selected 87 women from 104 women with TNBC who had been randomly assigned to receive doxorubicin (60 mg per square meter of body-surface area) plus cyclophosphamide (600 mg per square meter) for four cycles, followed by four cycles of paclitaxel (175 mg per square meter) or two more cycles of doxorubicin plus cyclophosphamide. Due to predictions of clinical outcomes in women who receive adjuvant paclitaxel based chemotherapy, immunohistochemical analyses of these tissue specimens for CK5/6 were used.
RESULTS
Among patients with TNBC, 24 patients (27.6%) were classified as CK5/6-positive triple negative type. Twelve patients were classified as paclitaxel chemotherapy group and 75 patients were classified as no paclitaxel group. No interaction was observed between DFS or OS and paclitaxel regimens. CK5/6 was, however, not associated with a significant benefit from paclitaxel in our study.
CONCLUSION
In our study, the addition of paclitaxel after adjuvant treatment with doxorubicin (<60 mg per square meter) is not associated with DFS or OS in TNBC.

Keyword

Triple negative breast cancer; Paclitaxel; CK5/6

MeSH Terms

Breast
Breast Neoplasms
Chemotherapy, Adjuvant
Cyclophosphamide
Disease-Free Survival
Doxorubicin
Female
Humans
Paclitaxel
Phenobarbital
Prognosis
Cyclophosphamide
Doxorubicin
Paclitaxel
Phenobarbital

Figure

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  Fig. 1 Overall survival rate curves according to the CK5/6 in triple negative breast cancer (TNBC).

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  Fig. 2 Overall survival rate curves according to the adjuvant chemotherapy (CTx) with or without paclitaxel in triple negative breast cancer.

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