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Carbonic anhydrase IX is a prognostic biomarker in glioblastoma multiforme
Author(s) -
Cetin Bulent,
Gonul Ipek Isık,
Gumusay Ozge,
Bilgetekin Irem,
Algin Efnan,
Ozet Ahmet,
Uner Aytug
Publication year - 2018
Publication title -
neuropathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 61
eISSN - 1440-1789
pISSN - 0919-6544
DOI - 10.1111/neup.12485
Subject(s) - temozolomide , medicine , hazard ratio , oncology , proportional hazards model , biomarker , concomitant , chemotherapy , glioblastoma , multivariate analysis , chemoradiotherapy , survival analysis , anaplastic astrocytoma , gastroenterology , cancer research , astrocytoma , biology , confidence interval , biochemistry
The identification of prognostic factors in patients with glioblastoma multiforme (GBM) represents an area of increasing interest. Carbonic anhydrase IX (CA‐IX), a hypoxia marker, correlates with tumor progression in a variety of human cancers. However, the role of CA‐IX in GBM remains largely unknown. In the present study, we evaluated the prognostic role of CA‐IX in GBM patients. In total, 66 consecutive patients with GBM who received concomitant chemoradiotherapy and adjuvant chemotherapy with temozolomide were retrospectively reviewed, and all patients received temozolomide chemotherapy for at least 3 months. Kaplan–Meier curves and log‐rank tests were used for analysis of progression‐free survival (PFS) and overall survival (OS), and a multivariate Cox proportional hazard model was employed to identify factors with an independent effect on survival. The median OS was longer in patients with low levels of CA‐IX expression (18 months) compared to patients overexpressing CA‐IX (9 months) ( P = 0.004). There was not a statistically significant difference in median PFS (3.5 vs. 8 months, P = 0.054) between patients with high or low levels of CA‐IX expression. In multivariate analysis, the variables that were identified as significant prognostic factors for OS were preoperative Karnofsky performance scale score (KPS) (hazard ratio (HR), 3.703; P = 0.001), CA‐IX overexpression (HR, 1.967; P = 0.019), and incomplete adjuvant temozolomide treatment (HR, 2.241; P = 0.003) and gross‐total resection (HR, 1.956; P = 0.034). Our findings indicated that CA‐IX may be a potential prognostic biomarker in the treatment of GBM.