Expression changes of transforming growth factor-β and vascular endothelial growth factor in malignant brain gliomas and their values in tumor resectability evaluation / 中华神经医学杂志

ABSTRACT

Objective To analyze the expression changes of transforming growth factor-β (TGF-β) and vascular endothelial growth factor (VEGF) in malignant brain gliomas and their values in tumor resectability evaluation.Methods One hundred and eighty-eight patients with malignant brain gliomas received surgery in our hospital from January 2010 to January 2017 were chosen in our study as patient group;during the surgery,the glioma tissues and peritumoral tissues were collected;Westem blotting was employed to detect the VEGF and TGF-β expressions.Fifty healthy controls accepted healthy examinations at the same time-period were enrolled.Peripheral blood 24 h before surgery of the two groups was collected.ELISA was used to test the serum VEGF and TGF-β levels.The values of serum VEGF and TGF-β levels in tumor resectability were analyzed by receiver operating characteristic (ROC) curve.Results In the patient group,significantly higher levels of VEGF and TGF-β in the tumor tissues were noted as compared with those in the para-tumor tissues (P＜0.05).Significantly higher levels of VEGF and TGF-β in the patient group were noted as compared with those in the control group (P＜0.05).There were 126 patients received total tumor resection,while 62 just had partial tumor resection;one year after surgery,22 patients with total tumor resection (17.46％) died,and 20 patients with partial tumor resection (32.26％) died,which indicated that the cumulative mortality rate one year after surgery in patients with total tumor resection was significantly lower than that in patients with partial tumor resection (P＜0.05).With cut-off point value of 588.0 pg/mL,ROC analysis showed that the sensitivity of VEGF in prediction of total tumor resection was 80.65％,and specificity 80.16％,and area under curve 0.82,which were better than those of TGF-β.Conclusion For malignant brain glioma patients,the levels of VEGF and TGF-β increase,and VEGF shows an ideal value in tumor resectability evaluation.