Abstract:
BACKGROUND:Vascular endothelial growth factor (VEGF) isoforms, particularly the diffusible VEGF-121, could play a major role in the response of recurrent glioblastoma (GB) to anti-angiogenetic treatment with bevacizumab. We hypothesized that circulating VEGF-121 may reduce the amount of bevacizumab available to target the heavier isoforms of VEGF, which are the most clinically relevant. METHODS:We assessed the plasma level of VEGF-121 in a brain xenograft model, in human healthy controls, and in patients suffering from recurrent GB before and after bevacizumab treatment. Data were matched with patients' clinical outcome. RESULTS:In athymic rats with U87MG brain xenografts, the level of plasma VEGF-121 relates with tumor volume and it significantly decreases after iv infusion of bevacizumab. Patients with recurrent GB show higher plasma VEGF-121 than healthy controls (p = 0.0002) and treatment with bevacizumab remarkably reduced the expression of VEGF-121 in plasma of these patients (p = 0.0002). Higher plasma level of VEGF-121 was significantly associated to worse PFS and OS (p = 0.0295 and p = 0.0246, respectively). CONCLUSIONS:Quantitative analysis of VEGF-121 isoform in the plasma of patients with recurrent GB could be a promising predictor of response to anti-angiogenetic treatment.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Martini M,de Pascalis I,D'Alessandris QG,Fiorentino V,Pierconti F,Marei HE,Ricci-Vitiani L,Pallini R,Larocca LMdoi
10.1186/s12885-018-4442-2subject
Has Abstractpub_date
2018-05-10 00:00:00pages
553issue
1issn
1471-2407pii
10.1186/s12885-018-4442-2journal_volume
18pub_type
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