Effects of Surfactants on the Innate Immune System
Study Details
Study Description
Brief Summary
In this study we will test the ability of different commercially available hand soaps to effect the amount of anti-microbial peptides present on the surface of the human skin after washing with these soaps. Based on our experiments on pig skin, we expect the amount of antimicrobial peptide expression to decrease after using these different soaps.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
N/A |
Detailed Description
We will use tape-stripping methods to determine the level of antimicrobial peptides (specifically LL-37) present on the human skin after washing with different commercially available hand soaps. First we will do a baseline tape-stripping procedure to measure the amount of LL-37 on subjects' forearms. Tape stripping involves applying small, round tapes (CuDerm, Dallas, TX) to the skin, massaging them for about 10 second, and then removing them. This process is repeated 9 times for each tape. After doing baseline tape stripping samples, each participant's forearms will be washed with a different soap. The soap will be rinsed off, and the skin allowed to dry. After the forearms are dry (about 5 minutes later), repeat tape-stripping will be performed. This tape-stripping process will then be repeated 4 hours later, and then 24 hours later as well. Results of the LL-37 expression at each time point will then be compared between soaps.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Experimental: Soap recipient The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. |
Other: Soap
|
Outcome Measures
Primary Outcome Measures
- Normalized LL-37 Expression [Baseline]
LL-37 expression was measured using tape-stripping methods and expressed relative to baseline.
- Normalized LL-37 Expression [4 hours]
LL-37 was measured using tape-stripping methods and is expressed relative to baseline levels
- Normalized LL-37 Expression [5 minutes]
LL-37 expression was measured using tape-stripping methods and expressed relative to baseline.
- Normalized LL-37 Expression [24 hours]
LL-37 expression was measured using tape-stripping methods and expressed relative to baseline.
Eligibility Criteria
Criteria
Inclusion Criteria:
Those who meet all of the following criteria are eligible for enrollment into the study:
-
Age 18-60 years
-
Male or female of any race and ethnicity
-
Subject agrees to comply with study requirements.
Exclusion Criteria:
-
Subjects with severe medical condition(s) that in the view of the investigator prohibits participation in the study
-
Dermatologic disease such as psoriasis or atopic dermatitis which may have inherently abnormal antimicrobial peptide levels
-
Subject has Netherton's syndrome or other genodermatoses that result in a defective epidermal barrier
-
Pregnant or nursing females
-
Immunocompromised subjects (e.g., lymphoma, HIV/AIDS, Wiskott-Aldrich Syndrome), or with a history of active or malignant disease (excluding non-melanoma skin cancer) as determined by the participant's medical history.
-
Subjects with a history of psychiatric disease or history of alcohol or drug abuse that would interfere with the ability to comply with the study protocol
-
Subjects with significant concurrent medical condition(s) at screening that in the view of the investigator prohibits participation in the study (e.g., severe concurrent allergic disease, condition associated with malignancy, and condition associated with immunosuppression)
-
Active viral or fungal skin infections at the target areas
-
Previous participation in this study
-
Ongoing participation in an investigational drug trial
-
Use of any oral or topical antibiotic during the study and up to one week prior to entering the study
-
Use of any local topical medications less than one week prior to screening
-
Use of any systemic immunosuppressive therapy less than four weeks prior to screening.
-
Subjects with a history of or propensity to developing reactions after use of over the counter cleansers
-
History of allergy to adhesive tape
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | UCSD Division of Dermatology | San Diego | California | United States | 92122 |
Sponsors and Collaborators
- University of California, San Diego
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- UCSD 111295
Study Results
Participant Flow
Recruitment Details | |
---|---|
Pre-assignment Detail |
Arm/Group Title | Soap Recipient |
---|---|
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap |
Period Title: Overall Study | |
STARTED | 10 |
COMPLETED | 10 |
NOT COMPLETED | 0 |
Baseline Characteristics
Arm/Group Title | Soap Recipient |
---|---|
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap |
Overall Participants | 10 |
Age (years) [Mean (Standard Deviation) ] | |
Mean (Standard Deviation) [years] |
31.6
(7.4)
|
Sex: Female, Male (Count of Participants) | |
Female |
2
20%
|
Male |
8
80%
|
Ethnicity (NIH/OMB) (Count of Participants) | |
Hispanic or Latino |
1
10%
|
Not Hispanic or Latino |
9
90%
|
Unknown or Not Reported |
0
0%
|
Outcome Measures
Title | Normalized LL-37 Expression |
---|---|
Description | LL-37 expression was measured using tape-stripping methods and expressed relative to baseline. |
Time Frame | Baseline |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Soap Recipient |
---|---|
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap |
Measure Participants | 10 |
Mean (Standard Deviation) [percentage of baseline] |
100
(0)
|
Title | Normalized LL-37 Expression |
---|---|
Description | LL-37 was measured using tape-stripping methods and is expressed relative to baseline levels |
Time Frame | 4 hours |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Soap Recipient |
---|---|
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap |
Measure Participants | 10 |
Mean (Standard Deviation) [percentage of baseline] |
82
(10)
|
Title | Normalized LL-37 Expression |
---|---|
Description | LL-37 expression was measured using tape-stripping methods and expressed relative to baseline. |
Time Frame | 5 minutes |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Soap Recipient |
---|---|
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap |
Measure Participants | 10 |
Mean (Standard Deviation) [percentage of baseline] |
77
(30)
|
Title | Normalized LL-37 Expression |
---|---|
Description | LL-37 expression was measured using tape-stripping methods and expressed relative to baseline. |
Time Frame | 24 hours |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Soap Recipient |
---|---|
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap |
Measure Participants | 10 |
Mean (Standard Deviation) [percentage of baseline] |
87
(20)
|
Adverse Events
Time Frame | ||
---|---|---|
Adverse Event Reporting Description | ||
Arm/Group Title | Soap Recipient | |
Arm/Group Description | The forearms of all subjects will eventually be washed with the same soaps. There is only one arm for this study. Soap | |
All Cause Mortality |
||
Soap Recipient | ||
Affected / at Risk (%) | # Events | |
Total | / (NaN) | |
Serious Adverse Events |
||
Soap Recipient | ||
Affected / at Risk (%) | # Events | |
Total | 0/10 (0%) | |
Other (Not Including Serious) Adverse Events |
||
Soap Recipient | ||
Affected / at Risk (%) | # Events | |
Total | 0/10 (0%) |
Limitations/Caveats
More Information
Certain Agreements
Principal Investigators are NOT employed by the organization sponsoring the study.
There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.
Results Point of Contact
Name/Title | UCSD Dermatology Clinical Trials Manager |
---|---|
Organization | UCSD Dermatology Clinical Trials |
Phone | (858)657-8390 |
dermstudies@ucsd.edu |
- UCSD 111295