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Prolactin but not ACTH increases during sodium lactate-induced panic attacks
Christian Otte1, Michael Kellner, Josef Arlt
1University Hospital Hamburg-Eppendorf, Department of Psychiatry and Psychotherapy, Martinistrasse 52, 20246, Germany. otte@uke.uni-hamburg.de
Psychiatry Research
|April 3, 2002
Summary
Sodium lactate triggers panic attacks without activating the pituitary-adrenal axis. However, prolactin levels significantly increased in panic disorder patients, unlike ACTH, suggesting a distinct stress response.
Area of Science:
- Neuroendocrinology
- Psychiatry
- Stress Physiology
Background:
- Panic disorder is characterized by sudden, intense fear.
- The pituitary-adrenal axis is a key stress response system, but its role in lactate-induced panic is unclear.
- Prolactin is another hormone sensitive to stress.
Purpose of the Study:
- To investigate the hormonal stress response, specifically prolactin and ACTH, during sodium lactate-induced panic attacks.
- To compare the endocrine response in patients with panic disorder versus healthy controls.
Main Methods:
- Double-blind, randomized, placebo-controlled study.
- Infusion of sodium lactate and placebo in 8 patients with panic disorder and 8 matched healthy controls.
- Measurement of prolactin and ACTH (adrenocorticotropic hormone) levels.
Main Results:
- Sodium lactate infusion did not activate the pituitary-adrenal axis (ACTH secretion).
- Prolactin levels were significantly elevated in patients with panic disorder compared to controls (P < 0.05).
- A differential hormonal stress response was observed between panic disorder patients and controls.
Conclusions:
- The pituitary-adrenal axis is not the primary stress mediator in sodium lactate-induced panic.
- Elevated prolactin release in panic disorder patients suggests its involvement in the panic response.
- Further research is needed to elucidate the distinct neuroendocrine mechanisms underlying panic attacks.