Original Article Decreased peritherapeutic VEGF expression could be a predictor of responsiveness to first-line FOLFIRI plus bevacizumab in mCRC patients

Hsiang-Lin Tsai, Chih-Hung Lin, Ching-Wen Huang, I-Ping Yang, Yung-Sung Yeh, Wen-Hung Hsu, Jeng-Yih Wu, Chao-Hung Kuo, Fan-Ying Tseng, Jaw-Yuan Wang
2015 Int J Clin Exp Pathol   unpublished
Objective: Bevacizumab is the only anti-angiogenic agent approved in first-line therapy for metastatic colorectal cancer (mCRC). Although chemotherapy plus bevacizumab has led to improve outcomes for mCRC patients and is a common choice for first-line treatment of mCRC, previous research has established no prominent biomarker that can help to select patients who may benefit from bevacizumab in order to improve cost-effectiveness and therapeutic outcomes. The aim of this study was to compare
more » ... and post-therapeutic VEGF immunohisto-chemical (IHC) expression in mCRC patients treated with FOLFIRI plus bevacizumab to identify its potential role as a predictive biomarker. Methods: A total of 57 mCRC patients who underwent FOLFIRI combined with bevacizum-ab chemotherapy as a first-line neoadjuvant regimen were enrolled and clinical outcome data analyzed. Results: Low post-therapeutic VEGF expression (P < 0.001) and decreased peri-therapeutic VEGF expression (P < 0.001) were significantly predictive factors of responders. Furthermore, the 6-month progression-free survival (PFS) rate in mCRC patients with decreased peri-therapeutic VEGF expression was significantly better than the rate for those patients with no peri-therapeutic VEGF expression alterations (P = 0.033). Conclusions: Decreased peri-therapeutic VEGF expression in mCRC patients could probably be used to predict responsiveness to bevacizumab and subsequent PFS in clinical practice.