- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01831180
A Comparison of Scalp Blood Flow and Hair Shaft In Premenopausal Women Versus Postmenopausal Women
A Comparison of Scalp Blood Flow and Hair Shaft In Premenopausal Women Versus Postmenopausal Women: II-Scalp & Blood Flow 2012
Study Overview
Status
Conditions
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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North Carolina
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Winston-Salem, North Carolina, United States, 27157
- Wake Forest School of Medicine - Dermatology Clinic
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Must be willing to sign informed consent
- Female in age groups 19-25 years old and 60 years or older
- Must be of Caucasian descent, to avoid any ethnic differences in hair biology or pigment among different races
- Must be willing to have a thorough scalp and hair shaft examination
- Must be willing to discuss current and past hair care regimens
- Must have washed hair at least 48 hours, but not less than 12 hours prior to study visit
- Must be willing to not wash hair between Baseline and second visit.
- Pregnant and nursing females will not be allowed in the study; a baseline pregnancy test will be done to exclude pregnancy on females of childbearing potential
- Must be >6 months (26 weeks) postpartum
- Must have sufficient contrast between scalp skin color and hair color (Fitzpatrick skin type I-IV)
- Must have hair at least 2 inches long
- May have mild itching and mild scaling of the scalp, but not dandruff
- Must be willing to have hair clipped and shaved to 1 mm within an approximately 1cm2 test site
- Must be a non-smoker for the past 6 months
- Must be in good stable general health, with no current infections
- Must be able to return to the study site 48 hours after the Baseline visit for the second visit.
Exclusion Criteria:
- Must not have hypertension, diabetes, or any neurological disease since all these can affect scalp blood flow
- Must not take any antihistamines for two weeks prior to the baseline visit and throughout the study.
- Must not have any known allergy or past history of anaphylaxis to histamine
- May not have sewn-in or glued hair pieces or extensions at the time of the study
- Must not cut hair during the study
- Must not have hair loss beyond what is considered normal in the opinion of the Investigator at the time of the study
- Must not color hair or have other salon-type procedures (relaxer, permanent, highlighting, etc.) performed within 2 weeks of the initial visit
- Must not have any other underlying scalp disorder that could interfere with the test procedures or findings
- Must not have lost ≥10% of body weight within the past 12 months
- Must not have been on a weight reduction program overseen by a physician or nutritionist within the past 12 months
- Has used hair growth products e.g. minoxidil in the past 18 months
- Has undergone a hair transplant or scalp reduction surgery
- Has participated in a hair growth study within the past 15 months
- Is currently participating in another clinical study at this or any other facility
- Is taking, for a chronic condition, any prescription or over the counter medication(s) that in the opinion of the Investigator are likely to affect the hair properties (e.g. immunosuppressive agents, corticosteroids, or chronic use of anti-inflammatory medication)
- Application of any over-the-counter or prescription drug to the scalp on a routine basis within the past 3 months including but not limited to retinoids (e.g. retinal, tretinoin, retinylpalmitate, retinyl acetate, retinyl propionate), topical corticosteroids, benzyl peroxide, or any topical hormone therapy (e.g. Eterna 27)
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
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Premenopausal women 19-25 yrs
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Postmenopausal 60 yrs +
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Scalp/Hair Biological Structural
Time Frame: Baseline
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Two areas will be tested in total; one site on the scalp (parietal scalp: which is the area between top of the scalp and either ear) and one area on the forearm.
Study staff will take a template and mark off the designated scalp area with a marker.
This temporary ink mark will be used as a reference point.
The hairs in the marked area (approximately the size of a nickel) will be cut and clipped to 1 millimeter in length for analysis.
A digital photographic image of the scalp and hair shafts (phototrichogram) will be taken at the clipped hair site of the scalp.
The temporary ink mark that was placed during hair cutting/clipping will be used as a reference point to position the image for capture and storage.
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Baseline
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Scalp/Hair Biological Structural
Time Frame: 48 hours after baseline
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A site on the forearm will be marked as control on the second visit for laser blood flow measurements.
Forearm and scalp blood flow will be assessed with Laser Doppler Imager (LDI) on the marked sites.
Scalp reactive hyperemia (scalp blood flow) will be measured by injecting just under the skin a small amount of histamine (100 µg of histamine dihydrochloride in 1 ml normal saline) using small needle at both the chosen scalp and forearm sites.
Then the blood flow measurement with the LDI will be repeated at the above mentioned sites 1 minute after histamine injection.
The study staff will take another digital image (phototrichogram) of the clipped scalp area.
The temporary ink mark placed during the baseline visit will serve as a reference point.
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48 hours after baseline
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Hair Chemical Structural information
Time Frame: Baseline
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Chemical/Structural information Hair diameter (clipped hairs: Hair fiber diameter will be measured on the recovered hair from the initial clipping site. The analysis will be completed at an external laboratory using the OFDA100 instrument. The OFDA100 method allows measurement of the hair diameter from all of the individual hairs in the sample - enabling analysis of the diversity of the population of hairs. This method enables looking at the overall diameter of the population in a single sample, comparing the number of modes, the proportion of each mode, and also the individual diameters and variability of each mode. |
Baseline
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Hair Chemical Structure
Time Frame: 48 hours after baseline
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Chemical/Structural information Hair diameter (clipped hairs: Hair fiber diameter will be measured on the recovered hair from the initial clipping site. The analysis will be completed at an external laboratory using the OFDA100 instrument. The OFDA100 method allows measurement of the hair diameter from all of the individual hairs in the sample - enabling analysis of the diversity of the population of hairs. This method enables looking at the overall diameter of the population in a single sample, comparing the number of modes, the proportion of each mode, and also the individual diameters and variability of each mode. |
48 hours after baseline
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Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Scalp/Hair Care Practices
Time Frame: Baseline
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A self assessment questionnaire of hair type, care practices, attitudes, and beliefs.
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Baseline
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Scalp/Hair Care Practices
Time Frame: 48 hours after baseline
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A follow-up self assessment questionnaire of hair type, care practices, attitudes, and beliefs.
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48 hours after baseline
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Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Amy McMichael, MD, Wake Forest University Health Sciences
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- IRB00022675
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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