Differences in long-term effects of standard rodent diets on blood glucose and body weight of offspring.

Diabetol Int

Diabetes and Genes, Advanced Medical Initiatives, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.

Published: October 2022

Standard rodent diets are similar and contain well-balanced components, such as crude protein, fat, fiber, and ash. However, it is not clear whether there are differences in their long-term effects on metabolism. Here, we investigated the effects of long-term feeding of major standard diets, CRF-1, CE-2, and FR-1 to wild-type (WT) C57BL/6 mice on the blood glucose levels and body weight gain of their offspring, which were raised on the same diet and in the same environment as the mothers. The offspring have been influenced by the maternal diet during the fetal and neonatal stages, and were maintained on the same diet thereafter (until 60 weeks of age). In the CE-2 group, the offspring showed stable blood glucose levels and had the lowest body weight. The FR1 group showed the lowest blood glucose level, but body weight was increased significantly compared to the CE-2 group. In the CRF-1 group, higher blood glucose levels were seen from the neonatal stage and body weight increased more rapidly than in the other groups. Next, to determine the effects of blood glucose level and housing pattern on food and water consumption, severely diabetic (hyperglycemic) inducible cAMP early repressor (ICER) transgenic (Tg) mice and littermate WT mice (normoglycemic) were fed CE-2 diet and housed individually or in groups. Food and water consumption of WT mice was independent of housing pattern, whereas Tg mice showed significantly increased food and water consumption when housed individually, compared to group housing, and this did not change at different ages. Thus, the selection of standard diet and rearing method can have a marked impact on experimental outcomes in experiments using mice and presumably mouse cells, especially in studies of metabolism, diabetes, and obesity.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9477981PMC
http://dx.doi.org/10.1007/s13340-022-00578-xDOI Listing

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