Schnurri-2 mutant mice are hypersensitive to stress and hyperactive

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• The bone morphogenetic protein (BMP)/transforming growth factor-beta (TGF-beta)/activin superfamily influences nervous system development and adult brain function.
• The precise role of BMP/TGF-beta/activin signaling in modulating neuronal function is not fully understood.
• Schnurri (Shn) proteins are transcription factors involved in BMP signaling pathways, with Shn-2 known to regulate adipogenesis.

Purpose of the Study:

• To investigate the role of the transcription factor Schnurri-2 (Shn-2) in adult brain function and behavior.
• To determine the impact of Shn-2 deficiency on stress response, anxiety-like behavior, and locomotion.

Main Methods:

• Behavioral analysis of Shn-2 knockout (Shn-2(-/-)) mice compared to wild-type controls.
• Measurement of stress-induced corticosterone levels.
• Assessment of immediate early gene expression (e.g., c-Fos) in the brain.

Main Results:

• Shn-2(-/-) mice exhibited increased hypersensitivity to stress and anxiety-like behavior.
• Stress-induced corticosterone levels were significantly elevated in Shn-2(-/-) mice.
• Shn-2(-/-) mice showed increased activity in familiar environments and decreased basal and stress-induced expression of immediate early genes like c-Fos.

Conclusions:

• Shn-2 plays a critical role in regulating anxiety-like behavior and stress responses in adult mice.
• Shn-2 influences locomotion and the expression of immediate early genes in the brain.
• These findings highlight Shn-2 as a key molecular player in adult brain function and behavior.