Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
COMPLETED
NA
26 participants
INTERVENTIONAL
2018-09-04
2021-10-01
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
RANDOMIZED
PARALLEL
BASIC_SCIENCE
TRIPLE
Study Groups
Review each arm or cohort in the study, along with the interventions and objectives associated with them.
Placebo-Control Supplement
12 participants will receive a placebo-control supplement per daily oral feeding.
Placebo-Control Supplement
A once-daily oral dose of the placebo-control supplement will be consumed by adults for 14 consecutive days.
Streptococcus-Containing Probiotic Supplement
12 participants will receive a powdered probiotic containing 7.77 billion colony-forming units (CFU) of L. acidophilus, 8.25 billion CFU of B. lactis, and 2 billion CFU of S. salivarius bacteriocin-like inhibitory substance (BLIS) K12 per daily oral feeding.
Streptococcus-Containing Probiotic Supplement
A once-daily oral dose of the streptococcus-containing probiotic supplement will be consumed by adults for 14 consecutive days.
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
Placebo-Control Supplement
A once-daily oral dose of the placebo-control supplement will be consumed by adults for 14 consecutive days.
Streptococcus-Containing Probiotic Supplement
A once-daily oral dose of the streptococcus-containing probiotic supplement will be consumed by adults for 14 consecutive days.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
* Age 21-45 years of age;
* BMI between 18-30;
* No history of infectious disease; heart, metabolic, autoimmune endocrine, liver, or kidney diseases; GI related conditions such as malabsorption disease, Crohn's disease, colitis, inflammatory bowel disease; Type 1 or 2 diabetes mellitus, any type of cancer, heart disease;
* Practices good oral hygiene according to the American Dental Association with brushing teeth between 1-2 times per day;
* Willingness to only use the study toothpaste to brush or clean teeth and refrain from using any other oral-care products such as other toothpaste, mouthwash, rinses and breath-sprays during the five-week study period;
* Willingness to limit consumption of raw onions or garlic and fermented foods such as sauerkraut, pickles, miso, and kimchi during the five-week study period;
* Non-alcohol consumers or those who consume alcohol in moderation defined as having up to 1 drink per day for women and up to 2 drinks per day for men;
* Willingness to avoid binge drinking during the study period defined by the Centers for Disease Control and Prevention as: This pattern of drinking usually corresponds to 5 or more drinks on a single occasion for men or 4 or more drinks on a single occasion for women, generally within about 2 hours;
* Willingness to refrain from drinking any alcohol within 24 hours of each saliva sample collection;
* Willingness to refrain from using illicit drugs during the five-week study;
* Willingness to refrain from using tobacco (smoking or chewing) or smoking marijuana during the five-week study period;
* Willingness to refrain from intake of probiotics, kombucha, or yogurt during the five-week study period;
* Willingness to refrain from consuming more than 1 package of sugary candy and from chewing more than 1 package of chewing gum during the five-week study period;
* Willingness to refrain from having any non-emergency, elective oral surgeries, dental procedures or dental teeth cleanings during the five-week study period.
Exclusion Criteria
* History of periodontal disease, or gingivitis;
* Dental trauma or injury to the teeth and/or periodontium (gums, periodontal ligament, alveolar bone), and nearby soft tissues such as the lips, tongue within the past 4 weeks;
* Any oral surgery or intensive procedures made to the oral cavity (such as fillings, wisdom tooth extraction, root canal, dental implants, etc.) within the past 4 weeks;
* Routine dental cleaning within the past 4 weeks;
* Use of probiotics, kombucha, or yogurt/kefir within the past 7 days of enrollment;
* Use of probiotics containing S. salivarius within the past 8 weeks of enrollment;
* Use of oral or IV antibiotics within the past 8 weeks of enrollment;
* Consumption of more than one package of sugary candy (hard candy, gummy candy, mints, etc.) per day;
* Use of more than one package of chewing gum (sugary or sugarless) per day;
* Use of mouthwashes, mouth-rinses or breath-sprays more than three times per day;
* Current tobacco (smoking or chewing) or E-cigarette users or individuals who quit using less than one year before enrolling in the study;
* Frequent marijuana smoking or vaping, or use of other illicit drugs (must be no more than 12 times within the past year and no more than once per month);
* Marijuana smoking or vaping or use of other illicit drugs within the past 4 weeks;
* Excessive alcohol drinkers: For men, heavy drinking is typically defined as consuming 15 drinks or more per week. For women, heavy drinking is typically defined as consuming 8 drinks or more per week;
* Individuals who live within the same household or who are in intimate relationships with current or past study participants (to avoid horizontal transfer of the oral microbiome);
* Anyone the investigator feels isn't an applicable participant.
21 Years
45 Years
ALL
Yes
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
Renew Life Formulas Inc
INDUSTRY
University of California, Davis
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
University of California, Davis
Davis, California, United States
Countries
Review the countries where the study has at least one active or historical site.
References
Explore related publications, articles, or registry entries linked to this study.
Horz HP, Meinelt A, Houben B, Conrads G. Distribution and persistence of probiotic Streptococcus salivarius K12 in the human oral cavity as determined by real-time quantitative polymerase chain reaction. Oral Microbiol Immunol. 2007 Apr;22(2):126-30. doi: 10.1111/j.1399-302X.2007.00334.x.
Upton M, Tagg JR, Wescombe P, Jenkinson HF. Intra- and interspecies signaling between Streptococcus salivarius and Streptococcus pyogenes mediated by SalA and SalA1 lantibiotic peptides. J Bacteriol. 2001 Jul;183(13):3931-8. doi: 10.1128/JB.183.13.3931-3938.2001.
Ross KF, Ronson CW, Tagg JR. Isolation and characterization of the lantibiotic salivaricin A and its structural gene salA from Streptococcus salivarius 20P3. Appl Environ Microbiol. 1993 Jul;59(7):2014-21. doi: 10.1128/aem.59.7.2014-2021.1993.
Cosseau C, Devine DA, Dullaghan E, Gardy JL, Chikatamarla A, Gellatly S, Yu LL, Pistolic J, Falsafi R, Tagg J, Hancock RE. The commensal Streptococcus salivarius K12 downregulates the innate immune responses of human epithelial cells and promotes host-microbe homeostasis. Infect Immun. 2008 Sep;76(9):4163-75. doi: 10.1128/IAI.00188-08. Epub 2008 Jul 14.
Di Pierro F, Adami T, Rapacioli G, Giardini N, Streitberger C. Clinical evaluation of the oral probiotic Streptococcus salivarius K12 in the prevention of recurrent pharyngitis and/or tonsillitis caused by Streptococcus pyogenes in adults. Expert Opin Biol Ther. 2013 Mar;13(3):339-43. doi: 10.1517/14712598.2013.758711. Epub 2013 Jan 4.
Di Pierro F, Colombo M, Zanvit A, Rottoli AS. Positive clinical outcomes derived from using Streptococcus salivarius K12 to prevent streptococcal pharyngotonsillitis in children: a pilot investigation. Drug Healthc Patient Saf. 2016 Nov 21;8:77-81. doi: 10.2147/DHPS.S117214. eCollection 2016.
Di Pierro F, Donato G, Fomia F, Adami T, Careddu D, Cassandro C, Albera R. Preliminary pediatric clinical evaluation of the oral probiotic Streptococcus salivarius K12 in preventing recurrent pharyngitis and/or tonsillitis caused by Streptococcus pyogenes and recurrent acute otitis media. Int J Gen Med. 2012;5:991-7. doi: 10.2147/IJGM.S38859. Epub 2012 Nov 30.
Di Pierro F, Colombo M, Giuliani MG, Danza ML, Basile I, Bollani T, Conti AM, Zanvit A, Rottoli AS. Effect of administration of Streptococcus salivarius K12 on the occurrence of streptococcal pharyngo-tonsillitis, scarlet fever and acute otitis media in 3 years old children. Eur Rev Med Pharmacol Sci. 2016 Nov;20(21):4601-4606.
Burton JP, Chilcott CN, Tagg JR. The rationale and potential for the reduction of oral malodour using Streptococcus salivarius probiotics. Oral Dis. 2005;11 Suppl 1:29-31. doi: 10.1111/j.1601-0825.2005.01084.x.
Burton JP, Chilcott CN, Moore CJ, Speiser G, Tagg JR. A preliminary study of the effect of probiotic Streptococcus salivarius K12 on oral malodour parameters. J Appl Microbiol. 2006 Apr;100(4):754-64. doi: 10.1111/j.1365-2672.2006.02837.x.
Bourdichon F, Casaregola S, Farrokh C, Frisvad JC, Gerds ML, Hammes WP, Harnett J, Huys G, Laulund S, Ouwehand A, Powell IB, Prajapati JB, Seto Y, Ter Schure E, Van Boven A, Vankerckhoven V, Zgoda A, Tuijtelaars S, Hansen EB. Food fermentations: microorganisms with technological beneficial use. Int J Food Microbiol. 2012 Mar 15;154(3):87-97. doi: 10.1016/j.ijfoodmicro.2011.12.030. Epub 2011 Dec 31.
Authority, E.F.S., Introduction of a Qualified Presumption of Safety (QPS) approach for assessment of selected microorganisms referred to EFSA-Opinion of the Scientific Committee. EFSA Journal, 2007. 5(12): p. 587.
Mogensen, G., et al., Inventory of microoganisms with a documented history of use in food. 2002.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
1188050
Identifier Type: -
Identifier Source: org_study_id