Study on the Effects of a Probiotic on Autonomic and Psychological Stress
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|ClinicalTrials.gov Identifier: NCT02417454|
Recruitment Status : Completed
First Posted : April 15, 2015
Last Update Posted : October 19, 2017
|Condition or disease||Intervention/treatment||Phase|
|Stress, Psychological||Dietary Supplement: ProbioStick Other: Placebo||Phase 3|
There is a burgeoning literature involving nonhuman animal and human studies linking the microbiota environment in the gut to brain-behaviour relations. For example, animal studies demonstrate that germ-free rodents show heightened HPA-axis responses to stress compared to gnotobiotic animals. There are also a number of nonhuman and human studies that show positive effects of reducing stress after being treated with different probiotics. For example, in one recent double blind study in humans using standardized questionnaires indicated a greater reduction of stress and anxiety symptoms after one month of supplementation with a probiotic formulation compared to placebo. The groups were also differentiated by urinary cortisol levels after treatment. Other studies have found positive effects of probiotic treatment and stress reduction using other probiotics. Accordingly, there is accumulating empirical evidence from animal and human studies of the positive effects of probiotic treatment on stress reduction.
In this study, the investigators will investigate the stress reduction effects of the Lallemand Health Solutions (LHS) Probio'Stick® on healthy undergraduate students. The study will be conducted at the McMaster LIVELab, which is capable of collecting both physiological and behavioural measures from groups of up to 100 participants at a time.
Registration into this clinical trial will require students be screened via McMaster's SONA system (mcmaster.sona-systems.com). After the screening, participants that are eligible to participate will be given the option to register for an information meeting at which point one may opt to enrol in the study or not.
Once in the study, participants will undergo an initial screening in the LIVELab where they will be exposed to auditory, visual, and performance based stressors to measure a baseline. After such point, they will be randomized to receive Probio'Stick® or placebo for a 6-week, once daily, probiotic treatment at home. Following the 6 week intervention, participants will return to the lab for a second testing using the same procedures to establish a change from baseline.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||128 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Official Title:||A Double Blind Placebo Controlled Study on the Effects of a Probiotic on Autonomic and Psychological Stress Responses in Volunteers|
|Study Start Date :||September 2015|
|Actual Primary Completion Date :||August 2017|
|Actual Study Completion Date :||August 2017|
Participants will undergo the same study procedures as for the comparator; however, the product given will be the active probiotic supplement (ProbioStick).
Dietary Supplement: ProbioStick
One sachet daily, without or without meals (3 x 10^9 CFU per sachet)
(Lactobacillus helveticus R0052 and Bifidobacterium longum subsp. longum R0175)
Placebo Comparator: Placebo
Participants will undergo the same study procedures as for the probiotic; however, the product given will be a placebo, identical to the probiotic in taste, smell, colour, and comprised only of the same non-active ingredients in the probiotic supplement
One sachet daily, without or without meals (0 CFU per sachet)
- Changes in right frontal electroencephalography (EEG)/brain activity [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]Is a measure of stress/arousal
- Changes in salivary cortisol concentrations [ Time Frame: Pre and Post Visit 1 and Visit 2 (6 weeks apart) ]Collected via Salivette®, before and after each session in the lab.
- Change in the magnitude of startle response [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]Measured as facial electromyography (EMG) change
- Changes in sympathetic nervous system activation [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]Calculated as a measure of Heart Rate Variability (HRV) from electrocardiography (ECG) data
- Changes in Anxiety Scores as determined by the Beck Anxiety Inventory (BAI) [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]
- Changes in Stress Scores as determined by Cohen's Perceived Stress Scale (PSS) [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]
- Changes in General Affect Scores as determined by the Positive and Negative Affect Scale (PANAS) [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]
- Changes in Stress Scores as reported on a 1-10 Likert Scale [ Time Frame: Visit 1 and Visit 2 (6 weeks apart) ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02417454
|Hamilton, Ontario, Canada, L8S 4L8|
|Principal Investigator:||Laurel Trainor, Ph.D.||McMaster University|