1. Role of dietary polyamines in a phase III clinical trial of difluoromethylornithine (DFMO) and sulindac for prevention of sporadic colorectal adenomas.
- Author
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Raj, K P, Zell, J A, Rock, C L, McLaren, C E, Zoumas-Morse, C, Gerner, E W, and Meyskens, F L
- Subjects
Adenoma: mortality ,pathology ,prevention & control ,Adult ,Aged ,Aged ,80 and over ,Antineoplastic Combined Chemotherapy Protocols: therapeutic use ,Clinical Trials ,Phase II as Topic ,Colorectal Neoplasms: mortality ,pathology ,prevention & control ,Diet ,Eflornithine: administration & dosage ,Female ,Humans ,Male ,Middle Aged ,Neoplasm Recurrence ,Local: mortality ,pathology ,prevention & control ,Polyamines: administration & dosage ,Prognosis ,Sulindac: administration & dosage ,Survival Rate ,eflornithine ,placebo ,polyamine ,putrescine ,spermidine ,spermine ,sulindac ,adult ,aged ,article ,cancer combination chemotherapy ,cancer prevention ,cancer recurrence ,colorectal adenoma ,controlled study ,dietary intake ,double blind procedure ,female ,genotype ,human ,major clinical study ,male ,outcome assessment ,priority journal ,randomized controlled trial ,risk reduction ,Adenoma ,Adult ,Aged ,Aged ,80 and over ,Antineoplastic Combined Chemotherapy Protocols ,Clinical Trials ,Phase II as Topic ,Colorectal Neoplasms ,Diet ,Eflornithine ,Female ,Humans ,Male ,Middle Aged ,Neoplasm Recurrence ,Local ,Polyamines ,Prognosis ,Sulindac ,Survival Rate - Abstract
The polyamine-inhibitory regimen difluoromethylornithine (DFMO)+sulindac has marked efficacy in preventing metachronous colorectal adenomas. Polyamines are synthesised endogenously and obtained from dietary sources. Here we investigate dietary polyamine intake and outcomes in the DFMO+sulindac colorectal adenoma prevention trial.Dietary polyamine data were available for 188 of 267 patients completing the study. Total dietary polyamine content was derived by the sum of dietary putrescine, spermine and spermidine values and categorised into two groups: highest (>75-100%) vs the lower three quartiles (0-25, 25-50 and 50-75%). Baseline tissue polyamine concentration and ODC1 genotype were determined. Logistic regression models were used for risk estimation.A significant interaction was detected between dietary polyamine group and treatment with regard to adenoma recurrence (P=0.012). Significant metachronous adenoma risk reduction was observed after DFMO+sulindac treatment in dietary polyamine quartiles 1-3 (risk ratio (RR) 0.19; 95% confidence interval (CI) 0.08-0.42; P
- Published
- 2013