ABCB1, FCGR2A, and FCGR3A Polymorphisms in Patients with HER2-Positive Metastatic Breast Cancer Who Were Treated with First-Line Taxane plus Trastuzumab Chemotherapy

作者：Kim Ji Won; Kim Jee Hyun; Im Seock Ah^*; Kim Yu Jung; Han Hye Suk; Kim Jin Soo; Han Sae Won; Jeon Yoon Kyung; Oh Do Youn; Han Wonshik; Kim Tae You; Park In Ae; Noh Dong Young; Bang Yung Jue

来源：Oncology, 2012, 83(4): 218-227.

DOI：10.1159/000341359

• ABCB1
• FCGR2A
• FCGR3A
• Polymorphism
• Taxane
• Trastuzumab

Objective: The aim of this study was to elucidate clinical implications of ABCB1, FCGR2A, and FCGR3A polymorphisms in patients with HER2-positive metastatic breast cancer (MBC) after taxane plus trastuzumab (TH) chemotherapy. Methods: Using genomic DNA samples extracted from mononuclear cells of consecutive patients with HER2-positive MBC who received first-line TH, we analyzed five polymorphisms (ABCB1 1236C>T, ABCB1 2677G>T/A, ABCB1 3435C>T, FCGR2A 131H/R, and FCGR3A 158V/F) and then correlated them with the response rate, progression-free survival (PFS), overall survival (OS), and adverse events of patients. Results: A total of 57 women were analyzed. The median age was 46 years (range 27-72). ABCB1 2677T carriers had a longer PFS (p = 0.037) along with a tendency toward a longer OS (p = 0.057). ABCB1 3435CC genotype carriers had a shorter PFS (p = 0.039) along with a tendency toward a shorter OS (p = 0.093). In combined analysis, PFS was significantly longer in ABCB1 1236CC and/or 2677TT carriers compared to the others (p = 0.006). FCGR2A 131H/R and FCGR3A 158V/F polymorphisms were not significantly associated with response rate, PFS, and OS. Conclusions: Our data support that ABCB1 polymorphisms may predict PFS after first-line TH chemotherapy in patients with HER2-positive MBC. In contrast, FCGR2A 131H/R and FCGR3A 158V/F polymorphisms could not predict treatment outcomes.

• 出版日期2012