Tissue plasminogen activator modulates emotion in a social context

Area of Science:

• Neuroscience
• Behavioral Neuroscience
• Molecular Biology

Background:

• Tissue plasminogen activator (tPA) has established roles in the central nervous system.
• Its specific impact on social behavior remains largely unknown.

Purpose of the Study:

• To investigate the role of tPA in social behavior and neuronal activation.
• To compare social interactions and prefrontal cortex activity in tPA knockout (KO) mice and tPA heterogenic (Het) mice.

Main Methods:

• Resident-intruder test to assess social interaction latency and activity.
• Sociability and social novelty tests to evaluate social approach behaviors.
• Measurement of cFos-positive cells in the cingulate and prelimbic cortices after social stimulation.

Main Results:

• tPA KO mice exhibited delayed first contact in the resident-intruder test but increased overall activity.
• KO mice showed altered sociability and social novelty, approaching stimuli more frequently.
• Increased neuronal activation (cFos expression) was observed in the prefrontal cortex of tPA KO mice post-social stimulation.

Conclusions:

• tPA plays a significant role in modulating social behavior and emotional processing.
• The prefrontal cortex is implicated in tPA's effects on social context and emotion.