Association Studies of Fcγ Receptor Polymorphisms with Outcome in HER2+ Breast Cancer Patients Treated with Trastuzumab in NCCTG (Alliance) Trial N9831

被引:40
作者
Norton, Nadine [1 ]
Olson, Rebecca M. [2 ]
Pegram, Mark [2 ]
Tenner, Kathleen [3 ]
Ballman, Karla V. [3 ]
Clynes, Raphael [4 ]
Knutson, Keith L. [3 ,5 ]
Perez, Edith A. [1 ]
机构
[1] Mayo Clin, Jacksonville, FL 32224 USA
[2] Stanford Univ, Stanford, CA 94305 USA
[3] Mayo Clin, Rochester, MN USA
[4] Columbia Univ, New York, NY USA
[5] Vaccine & Gene Therapy Inst Florida, Lucie, FL USA
关键词
PLUS ADJUVANT CHEMOTHERAPY; IMMUNE-RESPONSES; THERAPY; COMPLEX; RIIB;
D O I
10.1158/2326-6066.CIR-14-0059
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Patients with HER2(+) breast cancer treated with trastuzumab and chemotherapy have superior survival compared with patients treated with chemotherapy alone. Polymorphisms within FCGR2A and FCGR3A are associated with binding affinity of natural killer cells to the IgG1 portion of trastuzumab, and a polymorphism in FCGR2B (I232T) is associated with impaired regulatory activity. The association of these polymorphisms with clinical response among trastuzumab-treated patients is equivocal, with both positive and negative associations. We performed genotyping analysis on the FCGR3A V158F, FCGR2A R131H, and FCGR2B I232T polymorphisms in 1,325 patients from the N9831 clinical trial. Patients in arm A (N = 419) received chemotherapy only. Patients in arms B (N = 469) and C (N = 437) were treated with chemotherapy and trastuzumab (sequentially in arm B and concurrently in arm C). Using log-rank test and Cox proportional hazard models, we compared disease-free survival (DFS) among genotypic groups within pooled arms B/C. We found no differences in DFS between trastuzumab-treated patients who had the FCGR3A 158 V/V and/or FCGR2A 131 H/H high-affinity genotypes and patients without those genotypes. Furthermore, there was no significant interaction between FCGR3A and FCGR2A and treatment. However, there was a difference in DFS for FCGR2B I232T, with I/I patients deriving benefit from trastuzumab (P < 0.001), compared with the T carriers who did not (P = 0.81). The interaction between FCGR2B genotype and treatment was statistically significant (P = 0.03). Our analysis did not reveal an association between Fc gamma R high-affinity genotypes and outcomes. However, it seems that the FCGR2B inhibitory gene may be predictive of adjuvant trastuzumab benefit. (C) 2014 AACR.
引用
收藏
页码:962 / 969
页数:8
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