Stress, Psychological Clinical Trial
Official title:
The Effect of Beta-Blockers, Aspirin, and Natural Habituation on Procoagulant Activity, Expression of Cellular Adhesion Molecules, and Endothelial Activation in Response to Acute Mental Stress: a Randomized Controlled Trial.
Verified date | October 2003 |
Source | Swiss Federal Institute of Technology |
Contact | n/a |
Is FDA regulated | No |
Health authority | Switzerland: Swissmedic |
Study type | Interventional |
This randomized double-blinded controlled trial uses a factorial design to investigate whether application of beta-blockers (inderal 80 mg) or aspirin (100 mg) or a combination thereof has an effect on the activation of the hemostatic system, the platelets and the endothelium in response to acute mental stress. Specifically we test the hypothesis that inderal attenuates the activation of the hemostatic system as compared to placebo. The second hypothesis is that aspirin attenuates the activation of platelets as compared to placebo. Subjects will be randomly allocated to either of the four following study arms: placebo - inderal - aspirin - inderal plus aspirin. Subjects will receive the study medication for five days prior to the mental stress. The acute mental stress consists of a public speaking session of 10 min duration immediately followed by a mental arithmetic test of 5 min duration. Blood will be collected prior to the stress, immediately thereafter, at 45 min at at 1 hour and 45 min.
Status | Active, not recruiting |
Enrollment | 80 |
Est. completion date | August 2004 |
Est. primary completion date | |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 40 Years to 55 Years |
Eligibility |
Inclusion Criteria: - Life-time non-smoker or non-smoker for more than a year, - native language Swiss-German, - systolic blood pressure <160 mm Hg, diastolic blood pressure <100 mm Hg. - Subjects must have a body mass index that is not considered to be a cardiovascular risk factor, i.e. = 26.5 kg/m2. Exclusion Criteria: - Individuals reporting cardiovascular disease, renal disorders, endocrine disorders, hepatopathy, psychiatric disorders or who take regular medication for any of these conditions. - Persons are excluded, who report to drink >5 cups (0.15 l each) of brewed coffee (> 500 mg caffeine) a day, or who report drink more than 1.0 l beer and 0.45 l wine per day, respectively. - All subjects on regular beta-blocking or aspirin medication are excluded from the study. - Participants will be required not to take aspirin or any other non-steroidal anti-inflammatory drug during the study period, beginning 10 days prior to the first study medication. |
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Factorial Assignment, Masking: Double-Blind, Primary Purpose: Prevention
Country | Name | City | State |
---|---|---|---|
Switzerland | Institute of Behavioral Sciences, Swiss Federal Institute of Technology | Zurich |
Lead Sponsor | Collaborator |
---|---|
Swiss Federal Institute of Technology | Swiss National Science Foundation |
Switzerland,
Mischler K, Fischer JE, Zgraggen L, Kudielka BM, Preckel D, von Känel R. The effect of repeated acute mental stress on habituation and recovery responses in hemoconcentration and blood cells in healthy men. Life Sci. 2005 Jul 22;77(10):1166-79. Epub 2005 — View Citation
von Känel R, Kudielka BM, Preckel D, Hanebuth D, Fischer JE. Delayed response and lack of habituation in plasma interleukin-6 to acute mental stress in men. Brain Behav Immun. 2006 Jan;20(1):40-8. — View Citation
von Känel R, Mills PJ, Ziegler MG, Dimsdale JE. Effect of beta2-adrenergic receptor functioning and increased norepinephrine on the hypercoagulable state with mental stress. Am Heart J. 2002 Jul;144(1):68-72. — View Citation
von Känel R, Preckel D, Zgraggen L, Mischler K, Kudielka BM, Haeberli A, Fischer JE. The effect of natural habituation on coagulation responses to acute mental stress and recovery in men. Thromb Haemost. 2004 Dec;92(6):1327-35. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Change scores in plasma levels of D-dimer determined by subtracting levels immediately after the stressor as compared to baseline levels prior to the stressor. | |||
Secondary | Change scores of a) monocyte and T-lymphocyte expression of L-selectin, lymphocyte-function associated antigen (LFA-1), and CD40L | |||
Secondary | monocyte tissue-factor antigen (CD 142) expression | |||
Secondary | plasma levels of TAT, t-PA, and PAI-1 | |||
Secondary | plasma levels of soluble intercellular adhesion molecule (sICAM-1), soluble vascular adhesion molecule (sVCAM-1), endothelin-1, and vWF |
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