No relationship between thymidine phosphorylase (TP, PD-ECGF) expression and hypoxia in carcinoma of the cervixCitation formats
Standard
No relationship between thymidine phosphorylase (TP, PD-ECGF) expression and hypoxia in carcinoma of the cervix. / Kabuubi, P.; Loncaster, J. A.; Davidson, S. E.; Hunter, R. D.; Kobylecki, C.; Stratford, I. J.; West, C. M L.
In: British Journal of Cancer, Vol. 94, No. 1, 16.01.2006, p. 115-120.Research output: Contribution to journal › Article › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - No relationship between thymidine phosphorylase (TP, PD-ECGF) expression and hypoxia in carcinoma of the cervix
AU - Kabuubi, P.
AU - Loncaster, J. A.
AU - Davidson, S. E.
AU - Hunter, R. D.
AU - Kobylecki, C.
AU - Stratford, I. J.
AU - West, C. M L
PY - 2006/1/16
Y1 - 2006/1/16
N2 - The expression of hypoxia-regulated genes promotes an aggressive tumour phenotype and is associated with an adverse cancer treatment outcome. Thymidine phosphorylase (TP) levels increase under hypoxia, but the protein has not been studied in association with hypoxia in human tumours. An investigation was made, therefore, of the relationship of tumour TP with hypoxia, the expression of other hypoxia-associated markers and clinical outcome. This retrospective study was carried out in patients with locally advanced cervical carcinoma who underwent radiotherapy. Protein expression was evaluated with immunohistochemistry. Hypoxia was measured using microelectrodes and the level of pimonidazole binding. There was no relationship of TP expression with tumour pO2 (r = -0.091, P = 0.59, n = 87) or pimonidazole binding (r = 0.13, P = 0.45, n = 38). There was no relationship between TP and HIF-1α, but there was a weak borderline significant relationship with HIF-2α expression. There were weak but significant correlations of TP with the expression of VEGF, CA IX and Glut-1. In 119 patients, the presence of TP expression predicted for disease-specific (P = 0.032) and metastasis-free (P = 0.050) survival. The results suggest that TP is not a surrogate marker of hypoxia, but is linked to the expression of hypoxia-associated genes and has weak prognostic power. © 2006 Cancer Research.
AB - The expression of hypoxia-regulated genes promotes an aggressive tumour phenotype and is associated with an adverse cancer treatment outcome. Thymidine phosphorylase (TP) levels increase under hypoxia, but the protein has not been studied in association with hypoxia in human tumours. An investigation was made, therefore, of the relationship of tumour TP with hypoxia, the expression of other hypoxia-associated markers and clinical outcome. This retrospective study was carried out in patients with locally advanced cervical carcinoma who underwent radiotherapy. Protein expression was evaluated with immunohistochemistry. Hypoxia was measured using microelectrodes and the level of pimonidazole binding. There was no relationship of TP expression with tumour pO2 (r = -0.091, P = 0.59, n = 87) or pimonidazole binding (r = 0.13, P = 0.45, n = 38). There was no relationship between TP and HIF-1α, but there was a weak borderline significant relationship with HIF-2α expression. There were weak but significant correlations of TP with the expression of VEGF, CA IX and Glut-1. In 119 patients, the presence of TP expression predicted for disease-specific (P = 0.032) and metastasis-free (P = 0.050) survival. The results suggest that TP is not a surrogate marker of hypoxia, but is linked to the expression of hypoxia-associated genes and has weak prognostic power. © 2006 Cancer Research.
KW - Cervix
KW - Hypoxia
KW - Hypoxia-inducible factor
KW - Thymidine phosphorylase
U2 - 10.1038/sj.bjc.6602882
DO - 10.1038/sj.bjc.6602882
M3 - Article
VL - 94
SP - 115
EP - 120
JO - BJC
JF - BJC
SN - 0007-0920
IS - 1
ER -