期刊
CANCER RESEARCH
卷 73, 期 24, 页码 7176-7188出版社
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/0008-5472.CAN-13-1528
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资金
- European Union through STREP TEMPO (Temporal genomics for tailored chronotherapeutics) [LSHG-CT-2006-037543]
- C5Sys project [ANR 2009-SYSB-002-01-04]
Circadian timing of anticancer medications has improved treatment tolerability and efficacy several fold, yet with intersubject variability. Using three C57BL/6-based mouse strains of both sexes, we identified three chronotoxicity classes with distinct circadian toxicity patterns of irinotecan, a topoisomerase I inhibitor active against colorectal cancer. Liver and colon circadian 24-hour expression patterns of clock genes Rev-erb alpha and Bmal1 best discriminated these chronotoxicity classes, among 27 transcriptional 24-hour time series, according to sparse linear discriminant analysis. An 8-hour phase advance was found both for Rev-erba and Bmal1 mRNA expressions and for irinotecan chronotoxicity in clock-altered Per2(m/m) mice. The application of a maximum-aposteriori Bayesian inference method identified a linear model based on Rev-erba and Bmal1 circadian expressions that accurately predicted for optimal irinotecan timing. The assessment of the Rev-erba and Bmal1 regulatory transcription loop in the molecular clock could critically improve the tolerability of chemotherapy through a mathematical model-based determination of host-specific optimal timing. (C) 2013 AACR.
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