PURPOSE: Survivin has been shown to be an important mediator of cellular radioresistance in vitro. This study aims to compare survivin expression and apoptosis to histomorphologic responses to neoadjuvant radiochemotherapy (RCT) in rectal cancer. MATERIALS AND METHODS: Thirty-six pre-treatment biopsies were studied. Survivin mRNA and protein expression plus TUNEL staining for apoptosis was performed. Response to treatment was assessed using a 5-point tumour regression grade. RESULTS: Survivin expression was not found to be predictive of response to RCT (p = NS). In contrast, spontaneous apoptosis was significantly (p = 0.0051) associated with subsequent response to RCT. However, no association between survivin expression and levels of apoptosis could be identified. CONCLUSIONS: This in vivo study failed to support in vitro studies showing an association between survivin and response to chemotherapy and radiation therapy. These results caution against the translation of the in vitro properties of survivin into a clinical setting.
PURPOSE: Survivin has been shown to be an important mediator of cellular radioresistance in vitro. This study aims to compare survivin expression and apoptosis to histomorphologic responses to neoadjuvant radiochemotherapy (RCT) in rectal cancer. MATERIALS AND METHODS: Thirty-six pre-treatment biopsies were studied. Survivin mRNA and protein expression plus TUNEL staining for apoptosis was performed. Response to treatment was assessed using a 5-point tumour regression grade. RESULTS: Survivin expression was not found to be predictive of response to RCT (p = NS). In contrast, spontaneous apoptosis was significantly (p = 0.0051) associated with subsequent response to RCT. However, no association between survivin expression and levels of apoptosis could be identified. CONCLUSIONS: This in vivo study failed to support in vitro studies showing an association between survivin and response to chemotherapy and radiation therapy. These results caution against the translation of the in vitro properties of survivin into a clinical setting.
Authors: E Kapiteijn; C A Marijnen; I D Nagtegaal; H Putter; W H Steup; T Wiggers; H J Rutten; L Pahlman; B Glimelius; J H van Krieken; J W Leer; C J van de Velde Journal: N Engl J Med Date: 2001-08-30 Impact factor: 91.245
Authors: T Ponnelle; C Chapusot; L Martin; A M Bouvier; S Plenchette; J Faivre; E Solary; F Piard Journal: J Cancer Res Clin Oncol Date: 2005-05-18 Impact factor: 4.553
Authors: Jose G Guillem; David B Chessin; Alfred M Cohen; Jinru Shia; Madhu Mazumdar; Warren Enker; Philip B Paty; Martin R Weiser; David Klimstra; Leonard Saltz; Bruce D Minsky; W Douglas Wong Journal: Ann Surg Date: 2005-05 Impact factor: 12.969
Authors: Francesco Stipa; Giorgio Lucandri; Mario Ferri; Giuseppe Casula; Vincenzo Ziparo Journal: Anticancer Res Date: 2004 Mar-Apr Impact factor: 2.480
Authors: Claus Rödel; Joachim Haas; Anke Groth; Gerhard G Grabenbauer; Rolf Sauer; Franz Rödel Journal: Int J Radiat Oncol Biol Phys Date: 2003-04-01 Impact factor: 7.038