Early-life sodium deprivation programs long-term changes in ingestive behaviors and energy expenditure in C57BL/6J mice. Am J Physiol Regul Integr Comp Physiol 2023 Nov 01;325(5):R576-R592
Date
09/18/2023Pubmed ID
37720996Pubmed Central ID
PMC10866575DOI
10.1152/ajpregu.00137.2023Scopus ID
2-s2.0-85174752582 (requires institutional sign-in at Scopus site)Abstract
Postnatal growth failure remains a significant problem for infants born prematurely, despite aggressive efforts to improve perinatal nutrition. Though often dysregulated in early life when children are born preterm, sodium (Na) homeostasis is vital to achieve optimal growth. We hypothesize that insufficient Na supply in this critical period contributes to growth restriction and programmed risks for cardiometabolic disease in later adulthood. Thus, we sought to ascertain the effects of prolonged versus early-life Na depletion on weight gain, body composition, food and water intake behaviors, and energy expenditure in C57BL/6J mice. In one study, mice were provided a low (0.04%)- or normal/high (0.30%)-Na diet between 3 and 18 wk of age. Na-restricted mice demonstrated delayed growth and elevated basal metabolic rate. In a second study, mice were provided 0.04% or 0.30% Na diet between 3 and 6 wk of age and then returned to standard (0.15%)-Na diet through the end of the study. Na-restricted mice exhibited growth delays that quickly caught up on return to standard diet. Between 6 and 18 wk of age, previously restricted mice exhibited sustained, programmed changes in feeding behaviors, reductions in total food intake, and increases in water intake and aerobic energy expenditure while maintaining normal body composition. Although having no effect in control mice, administration of the ganglionic blocker hexamethonium abolished the programmed increase in basal metabolic rate in previously restricted mice. Together these data indicate that early-life Na restriction can cause programmed changes in ingestive behaviors, autonomic function, and energy expenditure that persist well into adulthood.
Author List
Ziegler AA, Lawton SBR, Grobe CC, Reho JJ, Freudinger BP, Burnett CML, Nakagawa P, Grobe JL, Segar JLAuthors
Justin L. Grobe PhD Professor in the Physiology department at Medical College of WisconsinPablo Nakagawa PhD Assistant Professor in the Physiology department at Medical College of Wisconsin
John J. Reho Research Scientist II in the Physiology department at Medical College of Wisconsin
Jeffrey L. Segar MD Professor in the Pediatrics department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AnimalsBody Weight
Child
Energy Metabolism
Feeding Behavior
Female
Humans
Infant
Mice
Mice, Inbred C57BL
Pregnancy
Sodium
Weight Gain