Abstract |
The ability of the bioreductive drugs AQ4N and tirapazamine to enhance the anti-tumour effect of cyclophosphamide was assessed in three murine tumour models. In male BDF mice implanted with the T50/80 mammary carcinoma, AQ4N (50-150 mg kg(-1)) in combination with cyclophosphamide (100 mg kg(-1)) produced an effect equivalent to a single 200 mg kg 1 dose of cyclophosphamide. Tirapazamine (25 mg kg(-1)) in combination with cyclophosphamide (100 mg kg(-1)) produced an effect equivalent to a single 150 mg kg(-1) dose of cyclophosphamide. In C3H mice implanted with the SCCVII or RIF-1 tumours, enhancement of tumour cell killing was found with both drugs in combination with cyclophosphamide (50-200 mg kg(-1)); AQ4N (50-200 mg kg(-1)) produced a more effective combination than tirapazamine (12.5-50 mg kg(-1)). Unlike tirapazamine, which showed a significant increase in toxicity to bone marrow cells, the combination of AQ4N (100 mg kg(-1)) 6 h prior to cyclophosphamide (100 mg k(-1)) resulted in no additional toxicity towards bone marrow cells compared to that caused by cyclophosphamide alone. In conclusion, AQ4N gave a superior anti-tumour effect compared to tirapazamine when administered with a single dose of cyclophosphamide (100 mg kg(-1)).
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Authors | O P Friery, R Gallagher, M M Murray, C M Hughes, E S Galligan, I A McIntyre, L H Patterson, D G Hirst, S R McKeown |
Journal | British journal of cancer
(Br J Cancer)
Vol. 82
Issue 8
Pg. 1469-73
(Apr 2000)
ISSN: 0007-0920 [Print] England |
PMID | 10780528
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Anthraquinones
- Antineoplastic Agents
- Prodrugs
- Triazines
- Tirapazamine
- AQ4N
- Cyclophosphamide
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Topics |
- Animals
- Anthraquinones
(administration & dosage, therapeutic use)
- Antineoplastic Agents
(therapeutic use)
- Antineoplastic Combined Chemotherapy Protocols
(therapeutic use)
- Cyclophosphamide
(administration & dosage, therapeutic use)
- Drug Synergism
- Female
- Male
- Mammary Neoplasms, Experimental
(drug therapy, pathology)
- Mice
- Mice, Inbred C3H
- Mice, Inbred Strains
- Prodrugs
(therapeutic use)
- Tirapazamine
- Triazines
(administration & dosage, therapeutic use)
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