Iron-restricted pair-feeding affects renal damage in rats with chronic kidney disease

Yoshiro Naito, Aya Senchi, Hisashi Sawada, Makiko Oboshi, Tetsuo Horimatsu, Keisuke Okuno, Seiki Yasumura, Masaharu Ishihara, Tohru Masuyama

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Background: We have previously shown that dietary iron restriction prevents the development of renal damage in a rat model of chronic kidney disease (CKD). However, iron deficiency is associated with appetite loss. In addition, calorie restriction is reported to prevent the development of end-stage renal pathology in CKD rats. Thus, the beneficial effect of iron restriction on renal damage may depend on calorie restriction. Here, we investigate the effect of pair-feeding iron restriction on renal damage in a rat model of CKD. Methods: First, to determine the amount of food intake, Sprague-Dawley (SD) rats were randomly given an ad libitum normal diet or an iron-restricted diet, and the food intake was measured. Second, CKD was induced by a 5/6 nephrectomy in SD rats, and CKD rats were given either a pair-feeding normal or iron-restricted diet. Results: Food intake was reduced in the iron-restricted diet group compared to the normal diet group of SD rats for 16 weeks (mean food intake; normal diet group and iron-restricted diet group: 25 and 20 g/day, respectively). Based on the initial experiments, CKD rats received either a pair-feeding normal or iron-restricted diet (20 g/day) for 16 weeks. Importantly, pair-feeding iron restriction prevented the development of proteinuria, glomerulosclerosis, and tubulointerstitial damage in CKD rats. Interestingly, pair-feeding iron restriction attenuated renal expression of nuclear mineralocorticoid receptor in CKD rats. Conclusions: Pair-feeding iron restriction affected renal damage in a rat model of CKD.

Original languageEnglish
Article numbere0172157
JournalPLoS ONE
Issue number2
StatePublished - Feb 1 2017

Bibliographical note

Publisher Copyright:
© 2017 Naito et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Agricultural and Biological Sciences
  • General


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