Abstract
Purpose
To determine if hypoxia-related molecular markers are associated with 60Cu labeled diacetyl-bis (N 4-methylthiosemicarbazone); (60Cu-ATSM) imaging of tumor hypoxia in cervical cancer.
Procedures
Fifteen patients were enrolled in a prospective study and underwent evaluation of tumor hypoxia with positron emission tomography (PET) using 60Cu-ATSM. 60Cu-ATSM-PET imaging was compared with the expression of tissue molecular markers, which included vascular endothelial growth factor (VEGF), cyclo-oxygenase-2 (COX-2), epidermal growth factor receptor (EGFR), carbonic anyhdrase IX (CA-9), and apoptotic index.
Results
Six patients had hypoxic tumors determined by 60Cu-ATSM, and nine had non-hypoxic tumors. The 4-year overall survival estimates were 75% for patients with non-hypoxic tumors and 33% for those with hypoxic tumors (p = 0.04). Overexpression of VEGF (p = 0.13), EGFR (p = 0.05), CA-9 (p = 0.02), COX-2 (p = 0.08), and the presence of apoptosis (p = 0.005) occurred in patients with hypoxic tumors. Cox proportional hazards modeling demonstrated hypoxia as determined by 60Cu-ATSM to be a significant independent predictor of tumor recurrence (p = 0.0287).
Conclusions
60Cu-ATSM hypoxia was correlated with overexpression of VEGF, EGFR, COX-2, CA-9, an increase in apoptosis, and a poor outcome.
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Acknowledgement
The authors acknowledge Jason Lewis, Ph.D., and the staff who produced the Cu-ATSM.
This work is also supported in part by NIH Grant CA086307-08, DOE Grant DE-FG02-87, and *RSNA grant MSD0404.
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Grigsby, P.W., Malyapa, R.S., Higashikubo, R. et al. Comparison of Molecular Markers of Hypoxia and Imaging with 60Cu-ATSM in Cancer of the Uterine Cervix. Mol Imaging Biol 9, 278–283 (2007). https://doi.org/10.1007/s11307-007-0095-2
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DOI: https://doi.org/10.1007/s11307-007-0095-2