P5-14-05: Anti-Müllerian Hormone (AMH) Levels in Premenopausal Breast Cancer Patients Treated with Adjuvant Chemotherapy – A Translational Research Project of the SUCCESS Study.

Abstract

Abstract Background: Premenopausal women undergoing chemotherapy are at risk of premature ovarian failure and long term side-effects caused by premature menopause. However, knowledge about the rate of ovarian failure and potential markers to evaluate the ovarian reserve is limited, especially in the context of modern chemotherapy concepts. Therefore, Anti-Müllerian hormone (AMH) was measured at before, immediately after and 2 years after chemotherapy in premenopausal patients of the SUCCESS study. Materials and Methods: The German SUCCESS trial is a multicenter phase III study comparing FEC-Docetaxel vs. FEC-Docetaxel+Gemcitabine as adjuvant treatment in patients with node positive or high risk node negative primary breast cancer. Blood samples were taken prior to and 4 weeks after last cycle of adjuvant chemotherapy, as well as after 2 years of follow up. We retrospecitvely identified 170 patients stratified premenopausal and aged 40 years or younger at trial entry, who received 3cycles of FEC (500/100/500mg/m2) q3w followed by 3 cycles of docetaxel (100mg/m2) q3w as one of the most commonly used chemotherapy regimens in Europe. Serum AMH levels were evaluated in a central laboratory by a manual immunoassay AMH DSL ELISA (Diagnostic Systems Laboratories, Webster, USA). Results: Median age within this subgroup was 36 years (21-40 years). 48% of the patients had a tumor stage pT1 and 54% were node positive. 69% were hormone receptor positive and 29% Her2 positive. Median serum AMH level before adjuvant chemotherapy was 1.32 ng/ml (range <0.1−11.32). Immediately after chemotherapy AMH levels dropped in 96% of the patients below the threshold of detection (<0.1 ng/ml, range <0.1−3.9ng/ml). No association to classical prognostic markers, such as tumor stage, lymph node involvement, etc. was observed. After a follow up period of 2 years, serum was available from 95 patients. 76% of those patients showed no evidence of ovarian function indicated by AMH (<0.1 ng/ml, range <0.1−1.43ng/ml). AMH levels prior to and 2 years after chemotherapy were significantly correlated with older age, with a reduction of 0.14 ng/ml per life year (p=0.0025) and 0.01 ng/ml (p=0.017) respectively. 12 patients (7%) received optional gonadotropin-releasing hormone (GnRH) agonists during chemotherapy. These patients presented significantly higher AMH levels (+ 0.18 ng/ml; p=0.01) 2 years after cytotoxic treatment. Conclusion: In this retrospective analysis premenopausal patients showed a high rate of ***f ovarian insufficiency reflected by low serum AMH levels immediately after cytotoxic treatment and after 2 years of follow up. GnRH agonists given as ovarian protectants during chemotherapy may have an influence on serum AMH 2 years after chemotherapy. Further data from prospective trials with longer follow up are needed to evaluate the role of serum AMH as a predictor of ovarian failure in breast cancer patients exposed to chemotherapy. Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P5-14-05.