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Maternal Consumption of a Cafeteria Diet during Lactation Leads to Altered Diet-Induced Thermogenesis in Descendants after Exposure to a Western Diet in Adulthood

Maternal Consumption of a Cafeteria Diet during Lactation Leads to Altered Diet-Induced Thermogenesis in Descendants after Exposure to a Western Diet in Adulthood

Nutrients 14(9)

PMID: 35565926

This study investigates the ability of a maternal cafeteria diet during lactation to program brown adipose tissue (BAT) metabolic responses to an obesogenic diet re-exposure in the adult offspring after consuming a standard diet (SD). Nursing rats were fed an SD or a cafeteria diet during lactation. Their offspring (O-C and O-CAF, respectively) were weaned onto an SD, and at 16 weeks of age they were switched to a Western diet until week 24. Gene and protein expression in BAT were measured at PN22 and at 24 weeks. At PN22, compared to controls, O-CAF rats displayed lower mRNA levels of lipogenesis-related genes (Fasn), and higher expression of genes related to lipolysis (Pnpla2), fatty acid uptake (Cd36, Lpl), and oxidation (Cpt1b). Additionally, O-CAF animals displayed increased mRNA levels of Adrb3, Ucp1, and Cidea. In adulthood, these animals maintained lower mRNA levels of lipogenesis-related genes (Pparg, Srebf1, Fasn), but displayed lower expression of genes related to fatty acid uptake (Cd36), fatty acid oxidation (Cpt1b), lipolysis (Pnpla2), Adrb3, Ucp1, and Cidea. Thus, exposure to an obesogenic diet in nursing rats can affect long-term lipid metabolism and attenuate diet-induced thermogenesis in BAT in response to a new obesogenic dietary challenge later in life.

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