Purpose: High and low levels of selenium (Se) have been related to metabolic disorders in dams and in their offspring. Their relationship to oxidative balance and to AMP-activated protein kinase (AMPK) is some of the mechanisms proposed. The aim of this study is to acquire information about how Se is involved in metabolic programming.
Methods: Three experimental groups of dam rats were used: control (Se: 0.1 ppm), Se supplemented (Se: 0.5 ppm) and Se deficient (Se: 0.01 ppm). At the end of lactation, the pups' metabolic profile, oxidative balance, Se levels, selenoproteins and IRS-1 hepatic expression, as well as hepatic AMPK activation were measured.
Results: The experimental groups present deep changes in Se homeostasis, selenoproteins and IRS-1 hepatic expression, oxidative balance, AMPK activation ratio and insulin levels. They do, however, have different metabolic profiles.
Conclusions: High- and low-Se diets are linked to insulin resistance, yet the mechanisms involved are completely opposite.
Keywords: Dietary selenium; Energy homeostasis; Insulin resistance; Metabolic programming; Oxidative balance.