Selenium Protects Mouse Hypothalamic Cells from Glucocorticoid-Induced Endoplasmic Reticulum Stress Vulnerability and...

Area of Science:

• Endocrinology
• Neuroscience
• Nutritional Science

Background:

• Glucocorticoids induce metabolic side effects like weight gain and insulin resistance.
• The hypothalamus regulates energy balance and is sensitive to glucocorticoids.
• Glucocorticoids can increase oxidative stress and endoplasmic reticulum stress.

Purpose of the Study:

• To investigate selenium's protective role against glucocorticoid-induced hypothalamic dysfunction.
• To determine if selenium can mitigate corticosterone's negative effects on hypothalamic cells.

Main Methods:

• Mouse hypothalamic cells (mHypoE-44) were treated with corticosterone.
• Cellular physiology, endoplasmic reticulum stress, and insulin signaling were analyzed.
• The effects of selenium supplementation were assessed.

Main Results:

• Corticosterone exposure increased vulnerability to endoplasmic reticulum stress and impaired insulin signaling.
• Selenium supplementation reduced endoplasmic reticulum stress.
• Selenium promoted insulin signaling in the presence of corticosterone.

Conclusions:

• Selenium plays a protective role against chronic glucocorticoid-induced hypothalamic dysfunction.
• Selenium may be a therapeutic target for managing metabolic disorders associated with glucocorticoid use.