Intermittent calorie restriction delays prostate tumor detection and increases survival time in TRAMP mice

Melissa J.L. Bonorden, Olga P. Rogozina, Christina M. Kluczny, Michael E. Grossmann, Patricia L. Grambsch, Joseph P. Grande, Susan Perkins, Anna Lokshin, Margot P. Cleary

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


Prostate cancer is the most frequently diagnosed cancer in men. Whereas chronic calorie restriction (CCR) delays prostate tumorigenesis in some rodent models, the impact of intermittent caloric restriction (ICR) has not been determined. Here, transgenic adenocarcinoma of the mouse prostate (TRAMP) mice were used to compare how ICR and CCR affected prostate cancer development. TRAMP mice were assigned to ad libitum (AL), ICR (2 wk 50% AL consumption followed by 2 wk pair feeding to AL consumption), and CCR (25% AL consumption) groups at 7 wk of age and followed until disease burden necessitated euthanasia or mice reached terminal endpoints (48 or 50 wk of age). Body weights fluctuated in response to calorie intake (P < 0.0001). ICR mice were older at tumor detection than AL (P = 0.0066) and CCR (P = 0.0416) mice. There was no difference for age of tumor detection between AL and CCR mice (P = 0.3960). Similar results were found for survival. Serum leptin, adiponectin, insulin, and IGF-I were all significantly different among the groups. These results indicate that the way in which calories are restricted impacts both time to tumor detection and survival in TRAMP mice, with ICR providing greater protective effect compared to CCR.

Original languageEnglish (US)
Pages (from-to)265-275
Number of pages11
JournalNutrition and Cancer
Issue number2
StatePublished - Mar 2009

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Oncology
  • Nutrition and Dietetics
  • Cancer Research


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