A soy-based phosphatidylserine/ phosphatidic acid complex (PAS) normalizes the stress reactivity of hypothalamus-pituitary-adrenal-axis in chronically stressed male subjects: a randomized, placebo-controlled study

Lipids in Health and Disease

David Rutenberg³  Ulla Freitas¹  Nadin Franz²  Dominic Vogt²  Juliane Hellhammer² 

[1] Lonza Ltd, Muenchensteinerstr. 38, 4002 Basel, Switzerland;Diagnostic Assessment and Clinical Research Organization (Daacro) GmbH & Co. KG, Science Park Trier, Max-Planck-Str. 22, 54296 Trier, Germany;Lipogen Ltd, P.O.Box 7687, 31078 Haifa, Israel

关键词: TSST;    Stress response;    Chronic stress;    Acute stress;    Cortisol;    PAS;    Stress;    Memree;    Phosphatidic acid;    Phosphatidylserine;   

Others  :  1159967
DOI  :  10.1186/1476-511X-13-121

 received in 2014-05-16, accepted in 2014-07-21,  发布年份 2014

【 摘 要 】

Background

Supplementation with a phosphatidylserine and phosphatidylserine/ phosphatidic acid complex (PAS) has been observed to normalize stress induced dysregulations of the hypothalamus-pituitary-adrenal axis (HPAA). Prolonged stress first induces a hyper-activation of the HPAA, which then can be followed by a state of hypo-activation.

The aim of this study was to examine effects of an oral supplementation with 400 mg PS & 400 mg PA (PAS 400) per day on the endocrine stress response (ACTH, saliva and serum cortisol) to a psychosocial stressor. A special focus was to analyze subgroups of low versus high chronically stressed subjects as well as to test efficacy of 200 mg PS & 200 mg PA (PAS 200).

Methods

75 healthy male volunteers were enrolled for this double-blind, placebo-controlled study, stratified by chronic stress level, and randomly allocated to one of three study arms (placebo, PAS 200 and PAS 400 per day, respectively). Study supplementation was administered for 42 days for each participant. Chronic stress was measured with the Trier Inventory for Chronic Stress (TICS), and subgroups of high and low chronic stress were differentiated by median values as provided by the TICS authors. A six week period of supplementation was followed by an acute stress test (Trier Social Stress Test - TSST).

Results

Chronic stress levels and other baseline measures did not differ between treatment groups (all p > 0.05). Acute stress was successfully induced by the TSST and resulted in a hyper-responsivity of the HPAA in chronically stressed subjects. Compared to placebo, a supplementation with a daily dose of PAS 400 was effective in normalizing the ACTH (p = 0.010), salivary (p = 0.043) and serum cortisol responses (p = 0.035) to the TSST in chronically high but not in low stressed subjects (all p > 0.05). Compared to placebo, supplementation with PAS 200 did not result in any significant differences in these variables (all p > 0.05). There were no significant effects of supplementation with PAS on heart rate, pulse transit time, or psychological stress response (all p > 0.05).

Conclusion

In chronically stressed subjects, a supplementation with PAS 400 (MemreePlus™) can normalize the hyper-responsivity of the HPAA to an acute stressor.

Trial registration

Trial registration: DRKS-ID: DRKS00005125

【 授权许可】

   
2014 Hellhammer et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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