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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Int+J+Radiat+Oncol+Biol+Phys
2014 ; 88
(5
): 1180-7
Nephropedia Template TP
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Rigosertib is a more effective radiosensitizer than cisplatin in concurrent
chemoradiation treatment of cervical carcinoma, in vitro and in vivo
#MMPMID24529717
Agoni L
; Basu I
; Gupta S
; Alfieri A
; Gambino A
; Goldberg GL
; Reddy EP
; Guha C
Int J Radiat Oncol Biol Phys
2014[Apr]; 88
(5
): 1180-7
PMID24529717
show ga
PURPOSE: To compare rigosertib versus cisplatin as an effective radiosensitizing
agent for cervical malignancies. METHODS AND MATERIALS: Rigosertib and cisplatin
were tested in cervical cancer cell lines, HeLa and C33A. A 24-hour incubation
with rigosertib and cisplatin, before irradiation (2-8 Gy), was used for
clonogenic survival assays. Cell cycle analysis (propidium iodide staining) and
DNA damage (?-H2AX expression) were evaluated by fluorescence-activated cell
sorter cytometry. Rigosertib was also tested in vivo in tumor growth experiments
on cervical cancer xenografts. RESULTS: Rigosertib was demonstrated to induce a
G2/M block in cancer cells. Survival curve comparison revealed a dose
modification factor, as index of radiosensitization effect, of 1.1-1.3 for
cisplatin and 1.4-2.2 for rigosertib. With 6-Gy irradiation, an increase in DNA
damage of 15%-25% was achieved in both HeLa and C33A cells with cisplatin
pretreatment, and a 71-108% increase with rigosertib pretreatment. In vivo tumor
growth studies demonstrated higher performance of rigosertib when compared with
cisplatin, with 53% longer tumor growth delay. CONCLUSIONS: Rigosertib was more
effective than cisplatin when combined with radiation and caused minimal
toxicity. These data support the need for clinical trials with rigosertib in
combination therapy for patients with cervical carcinoma.
|Animals
[MESH]
|Cell Cycle/drug effects/radiation effects
[MESH]
|Cell Line, Tumor
[MESH]
|Cell Separation
[MESH]
|Cell Survival
[MESH]
|Chemoradiotherapy/*methods
[MESH]
|Cisplatin/therapeutic use
[MESH]
|DNA Damage/drug effects/radiation effects
[MESH]
|DNA Repair
[MESH]
|Dose-Response Relationship, Radiation
[MESH]
|Female
[MESH]
|Flow Cytometry
[MESH]
|Glycine/*analogs & derivatives/therapeutic use
[MESH]
|HeLa Cells
[MESH]
|Humans
[MESH]
|Inhibitory Concentration 50
[MESH]
|Mice
[MESH]
|Mice, Nude
[MESH]
|Mitosis/drug effects/radiation effects
[MESH]
|Neoplasm Transplantation
[MESH]
|Radiation-Sensitizing Agents/*therapeutic use
[MESH]