Olfactory bulbectomy in mice induces alterations in exploratory behavior.

Area of Science:

• Neuroscience
• Behavioral Science
• Animal Models

Background:

• The olfactory bulbectomy (OBX) syndrome in rodents is a recognized model for psychomotor agitated depression.
• While extensively studied in rats, the OBX model in mice requires further behavioral characterization.

Purpose of the Study:

• To comprehensively characterize the behavioral alterations in mice following olfactory bulbectomy (OBX).
• To validate the murine OBX model for studying depression-like behaviors, particularly in the context of transgenic research.

Main Methods:

• Olfactory bulbectomy (OBX) was performed on mice.
• Behavioral assessments included open field tests, novel object exploration, novel cage exploration, and T-maze learning tasks.

Main Results:

• OBX mice displayed significant hyperactivity in the open field, novel home cage, and T-maze.
• Increased exploratory behavior was observed in OBX mice during novel object exploration and T-maze tasks.
• The observed behavioral changes in locomotion and exploration were robust and reproducible.

Conclusions:

• The murine OBX model exhibits consistent hyperactivity and enhanced exploratory behaviors, supporting its utility for modeling agitated depression.
• This extended characterization provides a valuable tool for investigating depression-like phenotypes in genetically modified mouse lines.