CO2 exposure as translational cross-species experimental model for panic

Area of Science:

• Neuroscience
• Psychiatry
• Translational Research

Background:

• Current psychiatric diagnostic criteria face challenges due to symptom heterogeneity and overlap.
• The US National Institute of Mental Health's Research Domain Criteria (RDoC) project aims for an etiology-based classification.
• Translating findings from rodent models to human psychiatric disorders is hindered by differing outcome measurements.

Purpose of the Study:

• To establish a translational panic model using a standardized CO2 stimulus.
• To quantitatively compare behavioral, emotional, and physiological responses across species (rodents, healthy humans, panic disorder patients).
• To bridge the gap between basic and clinical research for improved understanding and treatment of panic disorder.

Main Methods:

• Utilized carbon dioxide (CO2) inhalation as a standardized stimulus.
• Measured behavioral-emotional responses in mice and panic symptom ratings in human subjects.
• Assessed respiratory and cardiovascular responses to CO2 exposure in all study groups.

Main Results:

• CO2 exposure induced a robust fear response in mice and panic symptoms in healthy and panic disorder patients.
• Consistent respiratory and cardiovascular effects of CO2 were observed across species.
• The study demonstrated reliable cross-species comparability of outcome measurements.

Conclusions:

• The developed translational panic model facilitates cross-species comparison of panic disorder.
• This approach enhances knowledge translation between basic neuroscience and clinical psychiatry.
• Findings are crucial for advancing the etiological understanding and refining diagnostic and treatment strategies for panic disorder.