Journal article
Ugt1a is required for the protective effect of selenium against irinotecan-induced toxicity
Cancer chemotherapy and pharmacology, Vol.69(4), pp.1107-1111
04/2012
DOI: 10.1007/s00280-011-1820-8
PMCID: PMC3314158
PMID: 22237959
Abstract
Irinotecan (CPT-11) is widely used for the treatment of patients with colorectal cancer. However, the adverse effects associated with the treatment have hindered the efficacies of irinotecan. We have shown that organic selenium compounds could significantly attenuate irinotecan-associated toxicity and enhance antitumor activity in xenograft tumor models. The objective of this study is to determine the role of a specific group of uridine diphosphate glucuronosyltransferases, which is coded by UGT1A, in detoxification process of irinotecan as well as selenium-associated protective effect against irinotecan-induced toxicity.
In this study, the toxicities of irinotecan, docetaxel and cisplatin in the Ugta1 mutant rats and their wild-type controls were compared. The plasma concentrations of irinotecan and SN-38 were measured. The modulatory effect of a selenium compound on irinotecan-induced toxicity was analyzed in these rats.
We demonstrated that the maximum tolerated doses of irinotecan in the homozygous mutant rats were significantly lower than those in wild-type rats, 25 mg/kg × 1 versus 200 mg/kg × 1 and 3 mg/kg/day × 3 versus 100 mg/kg/day × 3, respectively. The enhanced sensitivity was specific to irinotecan and was not observed with other chemotherapeutic agents, such as docetaxel and cisplatin, where Ugt1a is not required for their metabolism. Our results also showed that selective protection against irinotecan-induced toxicity by 5-methylselenocysteine was achieved in the wild-type rats but not in the Ugt1a null rats.
These data support the hypothesis that expression of UGT1A is critical for 5-methylselenocysteine to exert its protective effect against irinotecan-induced toxicity.
Details
- Title: Subtitle
- Ugt1a is required for the protective effect of selenium against irinotecan-induced toxicity
- Creators
- Shousong Cao - Roswell Park Cancer InstituteFarukh A Durrani - Roswell Park Cancer InstituteYoucef M Rustum - Roswell Park Cancer InstituteY Eugene Yu - Roswell Park Cancer Institute
- Resource Type
- Journal article
- Publication Details
- Cancer chemotherapy and pharmacology, Vol.69(4), pp.1107-1111
- DOI
- 10.1007/s00280-011-1820-8
- PMID
- 22237959
- PMCID
- PMC3314158
- ISSN
- 0344-5704
- eISSN
- 1432-0843
- Grant note
- R01 HL091519 / NHLBI NIH HHS P30CA016056 / NCI NIH HHS P30 CA016056 / NCI NIH HHS R01HL091519 / NHLBI NIH HHS R01 HL091519-01A1 / NHLBI NIH HHS
- Language
- English
- Date published
- 04/2012
- Academic Unit
- Hematology, Oncology, and Blood & Marrow Transplantation; Internal Medicine
- Record Identifier
- 9984359878302771
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