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2017 ; 10
(ä): 2963-2970
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Serum levels of IGF-1 and IGF-BP3 are associated with event-free survival in
adult Ewing sarcoma patients treated with chemotherapy
#MMPMID28652778
de Groot S
; Gelderblom H
; Fiocco M
; Bovée JV
; van der Hoeven JJ
; Pijl H
; Kroep JR
Onco Targets Ther
2017[]; 10
(ä): 2963-2970
PMID28652778
show ga
BACKGROUND: Activation of the insulin-like growth factor 1 (IGF-1) pathway is
involved in cell growth and proliferation and is associated with tumorigenesis,
tumor progression, and therapy resistance in solid tumors. We examined whether
variability in serum levels of IGF-1, IGF-2, and IGF-binding protein 3 (IGF-BP3)
can predict event-free survival (EFS) and overall survival (OS) in Ewing sarcoma
patients treated with chemotherapy. PATIENTS AND METHODS: Serum levels of IGF-1,
IGF-2, and IGF-BP3 of 22 patients with localized or metastasized Ewing sarcoma
treated with six cycles of vincristine/ifosfamide/doxorubicin/etoposide (VIDE)
chemotherapy were recorded. Baseline levels were compared with presixth cycle
levels using paired t-tests and were tested for associations with EFS and OS.
Continuous variables were dichotomized according to the Contal and O'Quigley
procedure. Survival analyses were performed using Cox regression analysis.
RESULTS: High baseline IGF-1 and IGF-BP3 serum levels were associated with EFS
(hazard ratio [HR] 0.075, 95% confidence interval [CI] 0.009-0.602 and HR 0.090,
95% CI 0.011-0.712, respectively) in univariate and multivariate analyses (HR
0.063, 95% CI 0.007-0.590 and HR 0.057, 95% CI 0.005-0.585, respectively). OS was
improved, but this was not statistically significant. IGF-BP3 and IGF-2 serum
levels increased during treatment with VIDE chemotherapy (P=0.055 and P=0.023,
respectively). CONCLUSION: High circulating serum levels of IGF-1 and IGF-BP3 and
the molar ratio of IGF-1:IGF-BP3 serum levels were associated with improved EFS
and a trend for improved OS in Ewing sarcoma patients treated with VIDE
chemotherapy. These findings suggest the need for further investigation of the
IGF-1 pathway as a biomarker of disease progression in patients with Ewing
sarcoma.