Koc Yildirim E, Balkaya M. Dynamics of breast tumor incidence, tumor volume and serum metabolic hormones in calorie restricted rats.
Biotech Histochem 2020;
96:339-346. [PMID:
32672075 DOI:
10.1080/10520295.2020.1791955]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Reports of the effects of calorie restriction on tumors after the tumor has developed are uncommon and limited to a few tumor types. We investigated the effects of calorie restriction on tumor growth in breast cancer after tumor growth had progressed. We used the N-nitroso-N-methylurea (NMU) induced breast cancer model in rats. In addition to a healthy control group (C), rats with 10 - 12 mm tumors were divided into three groups: cancer control group (CC), alternate day feeding group (ADF) and calorie restriction group (CR-50%). At the end of the experimental period the volume of tumors was decreased in the CR-50% group compared to the CC group. Serum adiponectin concentrations for the C and ADF groups were higher than for the CC group. All tumors of the CR-50% group were benign. The highest incidence of malignant and invasive tumors occurred in the CC group. A 50% calorie restriction appears to be an effective dietary intervention for advanced tumors.
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