UNLABELLED: Metronomic low-dose chemotherapy regimen was found to have an antiangiogenic effect in tumors. However, its effect on levels of circulating pro-angiogenic and anti-angiogenic factors is not fully explored. MATERIALS AND METHODS: The levels of both VEGF and PDGF-BB were measured in three time points, in the serum of 32 rectal carcinoma patients receiving daily reduced-dose/continuous capecitabine in combination with preoperative pelvic irradiation. RESULTS: We found a significant decrease in VEGF and PDGF-BB serum levels during the combination treatment (p < 0.0001), followed by an increase in the successive rest-period (p < 0.0001). In addition, substantial changes in platelets counts were observed during treatment in correlation with the changes of VEGF and PDGF-BB serum levels. DISCUSSION: These results suggest that combined chemo-irradiation affect levels of pro-angiogenic factors during treatment, and may reflect an anti-angiogenic window induced during this treatment. The potential implications of this inducible phenomenon, including a possible clinical benefit from the administration of long lasting metronomic chemotherapy immediately following combined chemo-irradiation, would warrant further investigation.
UNLABELLED: Metronomic low-dose chemotherapy regimen was found to have an antiangiogenic effect in tumors. However, its effect on levels of circulating pro-angiogenic and anti-angiogenic factors is not fully explored. MATERIALS AND METHODS: The levels of both VEGF and PDGF-BB were measured in three time points, in the serum of 32 rectal carcinomapatients receiving daily reduced-dose/continuous capecitabine in combination with preoperative pelvic irradiation. RESULTS: We found a significant decrease in VEGF and PDGF-BB serum levels during the combination treatment (p < 0.0001), followed by an increase in the successive rest-period (p < 0.0001). In addition, substantial changes in platelets counts were observed during treatment in correlation with the changes of VEGF and PDGF-BB serum levels. DISCUSSION: These results suggest that combined chemo-irradiation affect levels of pro-angiogenic factors during treatment, and may reflect an anti-angiogenic window induced during this treatment. The potential implications of this inducible phenomenon, including a possible clinical benefit from the administration of long lasting metronomic chemotherapy immediately following combined chemo-irradiation, would warrant further investigation.
Authors: Mohammed I Shukoor; Meghan O Altman; Da Han; Abdullah Tahir Bayrac; Ismail Ocsoy; Zhi Zhu; Weihong Tan Journal: ACS Appl Mater Interfaces Date: 2012-06-18 Impact factor: 9.229
Authors: M Verstraete; A Debucquoy; J Dekervel; J van Pelt; C Verslype; E Devos; G Chiritescu; K Dumon; A D'Hoore; O Gevaert; X Sagaert; E Van Cutsem; K Haustermans Journal: Br J Cancer Date: 2015-03-17 Impact factor: 7.640