High survivin predicts a poor response to endocrine therapy, but a good response to chemotherapy in advanced breast cancer

Variants of survivin with differing subcellular localizations might mediate the different functions of survivin, i.e. cell-cycle regulation and apoptosis inhibition. Highly proliferative tumors are more sensitive to chemotherapy, whereas apoptosis resistant cells would be refractory to endocrine the...

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Veröffentlicht in:Breast cancer research and treatment 2006-07, Vol.98 (2), p.223-230
Hauptverfasser: SPAN, Paul N, TJAN-HEIJNEN, Vivianne C. G, MANDERS, Peggy, VAN TIENOVEN, Doorlene, LEHR, Jeffrey, SWEEP, Fred C. G. J
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container_end_page 230
container_issue 2
container_start_page 223
container_title Breast cancer research and treatment
container_volume 98
creator SPAN, Paul N
TJAN-HEIJNEN, Vivianne C. G
MANDERS, Peggy
VAN TIENOVEN, Doorlene
LEHR, Jeffrey
SWEEP, Fred C. G. J
description Variants of survivin with differing subcellular localizations might mediate the different functions of survivin, i.e. cell-cycle regulation and apoptosis inhibition. Highly proliferative tumors are more sensitive to chemotherapy, whereas apoptosis resistant cells would be refractory to endocrine therapy. Possibly, this explains incongruent data on the association of survivin with prognosis in breast cancer. Survivin levels were measured using ELISA in 800 x g pellets and 100,000 x g supernatants of breast cancer tissues from patients that were treated with either chemotherapy or endocrine therapy for advanced disease. These fractions might be enriched with nuclear or cytoplasmatic located survivin variants. Survivin levels were associated with tumors with poor prognostic clinical characteristics. For the patients treated with endocrine therapy, the patients with high survivin levels exhibited a significantly shorter progression free survival (PFS) than those who had low levels (pellet survivin Hazard Ratio (HR)=2.74, 95% Confidence Interval (CI)=1.31-5.72, p=0.008 and median PFS 5.8 versus 8.6 months, p=0.006, log-rank; cytosolic survivin HR=3.03, 95% CI=1.45-6.35, p=0.003). In contrast, for patients treated with chemotherapy, those with high cytosolic survivin had a significantly longer PFS than those with low levels (median PFS of 6.2 months, versus 4.7 months for patients with low cytosolic concentrations, p=0.024, log-rank). Thus, high levels of survivin are mainly related with a poor response to endocrine therapy, but a good response to chemotherapy. This phenomenon might be related to the different functions of survivin.
doi_str_mv 10.1007/s10549-005-9153-0
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subjects Adult
Aged
Aged, 80 and over
Antineoplastic Combined Chemotherapy Protocols - therapeutic use
Aromatase Inhibitors - therapeutic use
Biological and medical sciences
Breast cancer
Breast Neoplasms - chemistry
Breast Neoplasms - drug therapy
Breast Neoplasms - mortality
Cancer research
Cancer therapies
Chemotherapy
Endocrine therapy
Enzyme-Linked Immunosorbent Assay
Female
Gynecology. Andrology. Obstetrics
Hormones
Humans
Inhibitor of Apoptosis Proteins
Mammary gland diseases
Medical research
Medical sciences
Medroxyprogesterone Acetate - therapeutic use
Microtubule-Associated Proteins - analysis
Middle Aged
Neoplasm Proteins - analysis
Tamoxifen - therapeutic use
Tumors
title High survivin predicts a poor response to endocrine therapy, but a good response to chemotherapy in advanced breast cancer
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