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Radiosensitization of malignant melanoma. I. The effect of 7-hydroxy-chlorpromazine on the in vivo radiation response of Fortner's melanoma. [X rays; hamsters]

Journal Article · · Int. J. Radiat. Oncol., Biol. Phys.; (United States)

A number of investigators have reported the radiosensitizing effects of chlorpromazine (CPZ) in the treatment of malignant melanoma. In the present study, we explored radiosensitization of Fortner's melanoma in the hamster, by use of the 7-hydroxy metabolite (7-OHCPZ) of CPZ. In conjunction with orthovoltage photon radiation (XRT), 7-OHCPZ was found to repress mean tumor growth by as much as 54, 56, 38, and 53%, respectively, compared to XRT alone, 7-OHCPZ alone, CPZ + XRT, and no treatment. These results may be related to the greater affinity for melanin of 7-OHCPZ than CPZ. Possible therapeutic mechanisms are discussed.

Research Organization:
Hahnemann Medical Coll. and Hospital, Philadelphia
OSTI ID:
6585583
Journal Information:
Int. J. Radiat. Oncol., Biol. Phys.; (United States), Journal Name: Int. J. Radiat. Oncol., Biol. Phys.; (United States) Vol. 4:9/10; ISSN IOBPD
Country of Publication:
United States
Language:
English