Influence of HFD-induced precocious puberty on neurodevelopment in mice

Background: Precocious puberty is frequently associated with obesity, which will lead to long-term effects, especially on growth and reproduction. However, the effect of precocious puberty on children's neurodevelopment is still unknown. Objectives: Here we evaluated the effect of High fat diet (HFD)-induced precocious puberty on neurodevelopment and behaviors of animals. Methods: Ovaries sections were stained with hematoxylin-eosin (H&E) using standard techniques. Behavioral tests included elevated plus maze (EPM), open field exploration, Y-Maze, marble burying test, and novelty-suppressed feeding. The expression of genes related to puberty and neural development was detected by immunohistochemistry and Western blot. Results: Our results showed HFD-induced precocious puberty increased the risk-taking behavior and decreased memory of mice. The content of Tyrosine hydroxylase (TH) and Arginine vasopressin (AVP) in hypothalamus were higher in HFD group than control group. Although the recovery of normal diet will gradually restore the body fat and other physiological index of mice, the anxiety increases in adult mice, and the memory is also damaged. Conclusions: These findings describe the sensitivity of mice brain to HFD-induced precocious puberty and the irrecoverability of neural damage caused by precocious puberty. Therefore, avoiding HFD in childhood is important to prevent precocious puberty and neurodevelopmental impairment in mice.

Automated summary

The study showed that HFD-induced precocious puberty increased risk-taking behavior and decreased memory in mice, with significant effects on TH and AVP in the hypothalamus. Although recovery on normal diet restored physiological indices, anxiety increased and memory was impaired in adult mice.