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Calorie Restriction Suppresses the Progression of Radiation-Induced Intestinal Tumours in C3B6F1 Apc Mice. 2021

Takamitsu Morioka, and Shunsuke Yamazaki, and Hiromi Yanagihara, and Masaaki Sunaoshi, and Mutsumi Kaminishi, and Shizuko Kakinuma
Department of Radiation Effects Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan morioka.takamitsu@qst.go.jp kakinuma.shizuko@qst.go.jp.

OBJECTIVE Progress in cancer treatment and diagnosis has made second cancer after medical radiation exposure a particular concern among childhood cancer survivors. Calorie restriction (CR) is a broadly effective cancer prevention strategy, although its effects on radiation-induced intestinal tumours are unclear. Here we examined the cancer-preventative efficacy of a CR diet at different starting ages on radiation induction of intestinal tumours in mice. METHODS Male C3B6F1 ApcMin/+ mice were irradiated with 0 or 2 Gy of X-rays at 2 weeks of age. After an interval of 2, 8 or 18 weeks, mice were fed with a non-CR (95 kcal/week/mouse) or CR (65 kcal/week/mouse) diet. Intestinal tumours were evaluated for number, size distribution and malignancy. RESULTS CR suppressed the size and progression of both spontaneous and radiation-induced intestinal tumours depending on age at starting of CR. CR diets were effective even administered to adult mice. CONCLUSIONS CR was effective for suppression of tumour progression, which was accelerated by radiation exposure. Use of CR might be a useful cancer-prevention strategy for radiation-induced tumours of the intestinal tract.

UI MeSH Term Description Entries
D007414 Intestinal Neoplasms Tumors or cancer of the INTESTINES. Cancer of Intestines,Intestinal Cancer,Cancer of the Intestines,Intestines Cancer,Intestines Neoplasms,Neoplasms, Intestinal,Cancer, Intestinal,Cancer, Intestines,Cancers, Intestinal,Cancers, Intestines,Intestinal Cancers,Intestinal Neoplasm,Intestines Cancers,Intestines Neoplasm,Neoplasm, Intestinal,Neoplasm, Intestines,Neoplasms, Intestines
D007422 Intestines The section of the alimentary canal from the STOMACH to the ANAL CANAL. It includes the LARGE INTESTINE and SMALL INTESTINE. Intestine
D008297 Male Males
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D009381 Neoplasms, Radiation-Induced Tumors, cancer or other neoplasms produced by exposure to ionizing or non-ionizing radiation. Radiation-Induced Cancer,Cancer, Radiation-Induced,Radiation-Induced Neoplasms,Cancer, Radiation Induced,Cancers, Radiation-Induced,Neoplasm, Radiation-Induced,Neoplasms, Radiation Induced,Radiation Induced Cancer,Radiation Induced Neoplasms,Radiation-Induced Cancers,Radiation-Induced Neoplasm
D004032 Diet Regular course of eating and drinking adopted by a person or animal. Diets
D000367 Age Factors Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time. Age Reporting,Age Factor,Factor, Age,Factors, Age
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor
D014965 X-Rays Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source. Grenz Ray,Grenz Rays,Roentgen Ray,Roentgen Rays,X Ray,X-Ray,Xray,Radiation, X,X-Radiation,Xrays,Ray, Grenz,Ray, Roentgen,Ray, X,Rays, Grenz,Rays, Roentgen,Rays, X,X Radiation,X Rays,X-Radiations

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