Triclosan Effects on Microbial FloraNCT01509976
Triclosan, Triclocarban, and the Microbiota
A study testing triclosan/triclocarban-containing personal care products in people with Triclosan Effects on Microbial Flora, run by Stanford University at 1 site in United States.
Trial summary
Triclosan (5-chloro-2 (22,4-dichlorophenoxy)phenol) is a broad-spectrum antibacterial and antifungal agent that is found in thousands of common household products, including deodorants, toothpaste, "antibacterial" soaps, cleaning products, kitchen utensils, bedding, socks, trash bags. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Triclosan Effects on Microbial Flora
- What is being tested?
- triclosan/triclocarban-containing personal care products
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- 1 siteUnited States
- Study dates
- 1 Jul 2011to 31 Dec 2017
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Health subjects
- Age >18 years
Who cannot join
- Pregnancy
- Recent travel to the developing world (within 3 months)
- Recent use of antibiotics (within 3 months)
- Unwillingness to change personal care/hygiene products
- Recent gastrointestinal illness (within 3 months)
- Individuals who are unlikely to be available for the 10 months of the study period.
Trial locations and contacts
1 site in 1 country.
About this study
Triclosan (5-chloro-2 (22,4-dichlorophenoxy)phenol) is a broad-spectrum antibacterial and antifungal agent that is found in thousands of common household products, including deodorants, toothpaste, "antibacterial" soaps, cleaning products, kitchen utensils, bedding, socks, trash bags. The benefits of triclosan have not been proven except in reducing plaque and gingivitis when used in toothpaste. In this study, the investigators intend to look at whether exposure to triclosan changes the colonizing flora of the skin, gut and mouth as well as changes in certain blood hormone levels, including adipocytokines, androgens, and inflammatory markers. Changes in the gut microbiota have been associated with a variety of disease states such as inflammatory bowel disease, colorectal cancer. Additionally, reductions in the microbiome diversity have been associated with obesity.
Read the detailed description
Hypothesis: Exposure to triclosan changes microbial flora and leads to changes in
Objectives:
- Assess diversity and quantities of microbial flora in gut, skin, mouth before, during, and after TC use
- Assess whether TC use correlates with microbial resistance
- If any, assess time to change in alterations in microbial flora
Study design:
Prospective, randomized, double-blinded, cross-over study of 20 subjects
Here, we propose a pilot study in which we will compare the microbial flora of subjects who use triclosan-containing personal hygiene products and those who use triclosan-free products. We will randomize half the cohort to triclosan-containing personal hygiene products including toothpaste, liquid hand soap, bar soap, and dish soap for half of the cohort for a 5-month period of time. The participants and investigators will be blinded as to whether they are using triclosan-containing products or triclosan-free products by blinding the packaging. After about 5 months, the participants will cross-over to the other arm.
During a lead-in period of about 2 weeks, we will collect urine samples for a baseline triclosan level and body weight. We will also collect Leptin, Resistin, Grehlin, IL 10, IL17, PAI-1 Plasminogen activator inhibitor -1, TNFa, IFN-g, Insulin, IGF, Glucagon, CRP, TSH, Free T4T3, Estradiol, Testosterone free, Testosterone total, Adiponectin, IL6, Visfatin, H. pylori, ESR. Blood, urine, and body weight will be collected at three points in the study: prior to first phase, in between phases, and after completion of second phase.
We will collect stool, skin, tooth, and saliva samples multiple times throughout the study and submit for pyrosequencing.
- Conditions
- Triclosan Effects on Microbial Flora
- Being tested
- triclosan/triclocarban-containing personal care products
- Keywords
- Triclosan, Triclocarban, Microbial flora, Obesity
- Medical subject headings
- Obesity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
triclosan/triclocarban-containing personal care productsOther
Subjects will be randomly assigned to one of two arms with either triclosan/triclocarban-containing personal care products or products without triclosan/triclocarban. After 5 months, each subject will cross over to the other arm.
| Study group | Role | What they receive |
|---|---|---|
| Red | Other | This arm will either start with personal care products that contain triclosan and then and cross over to personal care products that do not contain triclosan or vice-versa. Since the investigators are blinded, it is not clear which arm is which. Receives: Other: triclosan/triclocarban-containing personal care products |
| Blue | Other | This arm will either start with personal care products that contain triclosan and then and cross over to personal care products that do not contain triclosan or vice-versa. Since the investigators are blinded, it is not clear which arm is which. Receives: Other: triclosan/triclocarban-containing personal care products |
What is being measured
The primary outcome is the main question the study is designed to answer.
Changes in microbial flora
We will assess diversity and quantities of microbial flora in gut, skin, mouth before, during, and after triclosan use.
Measured: 5 months in each phase for a total of 10 month study period
Microbial resistance
We will assess whether triclosan use correlates with microbial resistance
Measured: 5 months in each phase for a total of 10 month study period
Time to alteration in flora.
We will assess time to change in alterations in microbial flora, if any.
Measured: 5 months in each phase for a total of 10 month study period
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Jan 2012 (estimated)
- Study start1 Jul 2011
- Primary completion1 Oct 2015
- Study completion31 Dec 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (7)Papers the sponsor has linked to this study.
- Other trials for Triclosan Effects on Microbial FloraStudies of the same condition, open and under way.
- More trials run by Stanford UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 20 participants (actual)
Sponsor and investigators
- Lead sponsor
- Stanford University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Julie Parsonnet, Stanford University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01509976
- Sponsor's protocol ID
- AVOCET
- Status last verified
- Mar 2021
- First submitted
- 6 Jan 2012
- Last updated
- 17 Mar 2021
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Turnbaugh PJ, Hamady M, Yatsunenko T, Cantarel BL, Duncan A, Ley RE, Sogin ML, Jones WJ, Roe BA, Affourtit JP, Egholm M, Henrissat B, Heath AC, Knight R, Gordon JI. A core gut microbiome in obese and lean twins. Nature. 2009 Jan 22;457(7228):480-4. doi: 10.1038/nature07540. Epub 2008 Nov 30.
PubMed 19043404Russell AD. Whither triclosan? J Antimicrob Chemother. 2004 May;53(5):693-5. doi: 10.1093/jac/dkh171. Epub 2004 Apr 8.
PubMed 15073159Queckenberg C, Meins J, Wachall B, Doroshyenko O, Tomalik-Scharte D, Bastian B, Abdel-Tawab M, Fuhr U. Absorption, pharmacokinetics, and safety of triclosan after dermal administration. Antimicrob Agents Chemother. 2010 Jan;54(1):570-2. doi: 10.1128/AAC.00615-09. Epub 2009 Oct 12.
PubMed 19822703Guyer B, Freedman MA, Strobino DM, Sondik EJ. Annual summary of vital statistics: trends in the health of Americans during the 20th century. Pediatrics. 2000 Dec;106(6):1307-17. doi: 10.1542/peds.106.6.1307.
PubMed 11099582Cummings DE, Schwartz MW. Genetics and pathophysiology of human obesity. Annu Rev Med. 2003;54:453-71. doi: 10.1146/annurev.med.54.101601.152403. Epub 2001 Dec 3.
PubMed 12414915Charles J, Pan Y, Britt H. Trends in childhood illness and treatment in Australian general practice, 1971-2001. Med J Aust. 2004 Mar 1;180(5):216-9. doi: 10.5694/j.1326-5377.2004.tb05888.x.
PubMed 14984340Strachan DP. Hay fever, hygiene, and household size. BMJ. 1989 Nov 18;299(6710):1259-60. doi: 10.1136/bmj.299.6710.1259. No abstract available.
PubMed 2513902
Study at a glance
From the registry record, last updated by the sponsor on 17 Mar 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Triclosan, Triclocarban, and the Microbiota
- ClinicalTrials.gov ID
- NCT01509976
- Acronym / sponsor ID
- AVOCET
- Conditions
- Triclosan Effects on Microbial Flora
- Keywords
- Triclosan, Triclocarban, Microbial flora, Obesity
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 20 participants (actual)
- Lead sponsor
- Stanford UniversityUniversity, hospital or other
- Study start
- 1 Jul 2011 (actual)
- Primary completion
- 1 Oct 2015 (actual)
- Study completion
- 31 Dec 2017 (actual)
- First posted
- 13 Jan 2012 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Triclosan (5-chloro-2 (22,4-dichlorophenoxy)phenol) is a broad-spectrum antibacterial and antifungal agent that is found in thousands of common household products, including deodorants, toothpaste, "antibacterial" soaps, cleaning products, kitchen utensils, bedding, socks, trash bags. The benefits of triclosan have not been proven except in reducing plaque and gingivitis when used in toothpaste. In this study, the investigators intend to look at whether exposure to triclosan changes the colonizing flora of the skin, gut and mouth as well as changes in certain blood hormone levels, including adipocytokines, androgens, and inflammatory markers. Changes in the gut microbiota have been associated with a variety of disease states such as inflammatory bowel disease, colorectal cancer. Additionally, reductions in the microbiome diversity have been associated with obesity.
Detailed description
Hypothesis: Exposure to triclosan changes microbial flora and leads to changes in
Objectives:
- Assess diversity and quantities of microbial flora in gut, skin, mouth before, during, and after TC use
- Assess whether TC use correlates with microbial resistance
- If any, assess time to change in alterations in microbial flora
Study design:
Prospective, randomized, double-blinded, cross-over study of 20 subjects
Here, we propose a pilot study in which we will compare the microbial flora of subjects who use triclosan-containing personal hygiene products and those who use triclosan-free products. We will randomize half the cohort to triclosan-containing personal hygiene products including toothpaste, liquid hand soap, bar soap, and dish soap for half of the cohort for a 5-month period of time. The participants and investigators will be blinded as to whether they are using triclosan-containing products or triclosan-free products by blinding the packaging. After about 5 months, the participants will cross-over to the other arm.
During a lead-in period of about 2 weeks, we will collect urine samples for a baseline triclosan level and body weight. We will also collect Leptin, Resistin, Grehlin, IL 10, IL17, PAI-1 Plasminogen activator inhibitor -1, TNFa, IFN-g, Insulin, IGF, Glucagon, CRP, TSH, Free T4T3, Estradiol, Testosterone free, Testosterone total, Adiponectin, IL6, Visfatin, H. pylori, ESR. Blood, urine, and body weight will be collected at three points in the study: prior to first phase, in between phases, and after completion of second phase.
We will collect stool, skin, tooth, and saliva samples multiple times throughout the study and submit for pyrosequencing.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Red | Other | Other: triclosan/triclocarban-containing personal care productsThis arm will either start with personal care products that contain triclosan and then and cross over to personal care products that do not contain triclosan or vice-versa. Since the investigators are blinded, it is not clear which arm is which. |
| Blue | Other | Other: triclosan/triclocarban-containing personal care productsThis arm will either start with personal care products that contain triclosan and then and cross over to personal care products that do not contain triclosan or vice-versa. Since the investigators are blinded, it is not clear which arm is which. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Health subjects
- Age >18 years
Key exclusion criteria (6 listed)
- Pregnancy
- Recent travel to the developing world (within 3 months)
- Recent use of antibiotics (within 3 months)
- Unwillingness to change personal care/hygiene products
- Recent gastrointestinal illness (within 3 months)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| triclosan/triclocarban-containing personal care productsSubjects will be randomly assigned to one of two arms with either triclosan/triclocarban-containing personal care products or products without triclosan/triclocarban. After 5 months, each subject will cross over to the other arm. | Other | Blue, Red |
Primary outcome
Changes in microbial flora
Time frame: 5 months in each phase for a total of 10 month study period
We will assess diversity and quantities of microbial flora in gut, skin, mouth before, during, and after triclosan use.
Microbial resistance
Time frame: 5 months in each phase for a total of 10 month study period
We will assess whether triclosan use correlates with microbial resistance
Time to alteration in flora.
Time frame: 5 months in each phase for a total of 10 month study period
We will assess time to change in alterations in microbial flora, if any.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Mar 2021.
- Background: PubMed 19043404Turnbaugh PJ, Hamady M, Yatsunenko T, Cantarel BL, Duncan A, Ley RE, Sogin ML, Jones WJ, Roe BA, Affourtit JP, Egholm M, Henrissat B, Heath AC, Knight R, Gordon JI. A core gut microbiome in obese and lean twins. Nature. 2009 Jan 22;457(7228):480-4. doi: 10.1038/nature07540. Epub 2008 Nov 30.
- Background: PubMed 15073159Russell AD. Whither triclosan? J Antimicrob Chemother. 2004 May;53(5):693-5. doi: 10.1093/jac/dkh171. Epub 2004 Apr 8.
- Background: PubMed 19822703Queckenberg C, Meins J, Wachall B, Doroshyenko O, Tomalik-Scharte D, Bastian B, Abdel-Tawab M, Fuhr U. Absorption, pharmacokinetics, and safety of triclosan after dermal administration. Antimicrob Agents Chemother. 2010 Jan;54(1):570-2. doi: 10.1128/AAC.00615-09. Epub 2009 Oct 12.
- Background: PubMed 11099582Guyer B, Freedman MA, Strobino DM, Sondik EJ. Annual summary of vital statistics: trends in the health of Americans during the 20th century. Pediatrics. 2000 Dec;106(6):1307-17. doi: 10.1542/peds.106.6.1307.
- Background: PubMed 12414915Cummings DE, Schwartz MW. Genetics and pathophysiology of human obesity. Annu Rev Med. 2003;54:453-71. doi: 10.1146/annurev.med.54.101601.152403. Epub 2001 Dec 3.
- Background: PubMed 14984340Charles J, Pan Y, Britt H. Trends in childhood illness and treatment in Australian general practice, 1971-2001. Med J Aust. 2004 Mar 1;180(5):216-9. doi: 10.5694/j.1326-5377.2004.tb05888.x.
- Background: PubMed 2513902Strachan DP. Hay fever, hygiene, and household size. BMJ. 1989 Nov 18;299(6710):1259-60. doi: 10.1136/bmj.299.6710.1259. No abstract available.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing triclosan/triclocarban-containing personal care products in people with Triclosan Effects on Microbial Flora, run by Stanford University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 17 Mar 2021. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Changes in microbial flora (time frame: 5 months in each phase for a total of 10 month study period). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01509976, which also lists 7 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Mar 2021.