VitiligoNCT00177034
Examination Of Vitiligo Skin Samples Before and After UVB Treatment
A study testing Narrow Band UVB Treatment in people with Vitiligo, run by Mimi Cho, MD at 1 site in United States.
Trial summary
The keratinocytes of lesional skin of vitiligo compared to normal and perilesional skin will differentially express genes correlating with melanocyte death. Narrow Band UVB should then hopefully reverse the pattern of gene expression back toward normal. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Vitiligo
- What is being tested?
- Narrow Band UVB Treatment
- How many people
- 12 participants
- Where
- 1 siteUnited States
- Study dates
- Nov 2004to Dec 2005
- 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 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Patients should have non-treated symmetrically active vitiligo for 3 months.
Who cannot join
- Less than 18 years old and older that 65, pregnant women, segmental or nonactive vitiligo, patients treated for vitiligo in past 3 month, patients on topical steroid medications, topical tacrolimus or elidel, patients receiving ultraviolet therapy including narrow band UVB, PUVA or tanning beds.
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Minnesota
Minneapolis, Minnesota, 55455
About this study
Official title: Characterization of Keratinocyte Populations From Normal, Perilesional and Lesional Skin in Vitiligo Patients by Laser Capture Microdissection and Gene Array Analysis Before and After Narrow Band UVB Treatment
The keratinocytes of lesional skin of vitiligo compared to normal and perilesional skin will differentially express genes correlating with melanocyte death. Narrow Band UVB should then hopefully reverse the pattern of gene expression back toward normal.
Read the detailed description
Vitiligo is a disease caused by the disappearance of melanocytes in the epidermis. The pathogenesis of vitiligo is multifactorial. Theories include autoimmunity, neural, apoptosis and cytotoxicity. The medical treatments for vitiligo are marginal with a 40-60% response rate which does not guarantee full repigmentation. Understanding the pathogenesis of vitiligo will allow better targets for treatment.
Previous analysis of skin biopsies have found several of the changes in gene expression occurred in immune regulation, DNA replication and repair, oncogenes, signal transducers and transcription factors. These results give us insight as to what happens in lesional vs nonlesional skin which contains the epidermis, dermis, fat, blood vessels and immune cells.
We have the technology today to study specific cell populations from tissue by the use of laser capture microdissection. We propose to use this technique to study the keratinocyte population in vitiligo skin because past evidence suggests that they may play a role. In addition, the role keratinocytes in vitiligo may be important for treatment as this would be the ideal target for therapy. Keratinocytes have been studied in vitiligo.
The aim of the study is to isolate keratinocytes from normal skin, perilesional and lesional skin in vitiligo patients by laser capture microdissection and characterize their gene expression profile by gene microarray analysis and to compare keratinocyte gene expression in normal, perilesional and lesional vitiligo skin before and after narrow band UVB treatment.
- Conditions
- Vitiligo
- Being tested
- Narrow Band UVB Treatment
- Keywords
- Keratinocyte
- Medical subject headings
- Vitiligo
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Narrow Band UVB TreatmentDrug
What is being measured
The primary outcome is the main question the study is designed to answer.
Once genes profiling in keratinocytes between lesional and nonlesional skin is accomplished, we would like to characterize these keratinocyte populations after therapy.
Secondary outcomes (1)
Keratinocytes have not been studied by gene expression analysis in this setting. The results from microarray analysis will be useful to see if the difference between lesional and nonlesional gene expression is reversed by therapy.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Sep 2005 (estimated)
- Study startNov 2004
- Primary completionDec 2005
- Study completionDec 2005
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for VitiligoStudies of the same condition, open and under way.
- 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
- Diagnosis
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 12 participants
Sponsor and investigators
- Lead sponsor
- Mimi Cho, MD
- Collaborators
- American Skin Association
- Responsible party
- Sponsor
- Investigators
- Mimi Cho, MD, PhD, Principal investigator, University of Minnesota
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00177034
- Sponsor's protocol ID
- 0310M52823
- Status last verified
- Jul 2012
- First submitted
- 12 Sep 2005
- Last updated
- 10 Jul 2012
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 10 Jul 2012. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Characterization of Keratinocyte Populations From Normal, Perilesional and Lesional Skin in Vitiligo Patients by Laser Capture Microdissection and Gene Array Analysis Before and After Narrow Band UVB Treatment
- ClinicalTrials.gov ID
- NCT00177034
- Acronym / sponsor ID
- 0310M52823
- Conditions
- Vitiligo
- Keywords
- Keratinocyte
- Study type
- Interventional
- Recruitment status
- Terminated
- Enrolment
- 12 participants
- Lead sponsor
- Mimi Cho, MD
- Collaborators
- American Skin Association
- Study start
- Nov 2004
- Primary completion
- Dec 2005 (actual)
- Study completion
- Dec 2005 (actual)
- First posted
- 15 Sep 2005 (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.
The keratinocytes of lesional skin of vitiligo compared to normal and perilesional skin will differentially express genes correlating with melanocyte death. Narrow Band UVB should then hopefully reverse the pattern of gene expression back toward normal.
Detailed description
Vitiligo is a disease caused by the disappearance of melanocytes in the epidermis. The pathogenesis of vitiligo is multifactorial. Theories include autoimmunity, neural, apoptosis and cytotoxicity. The medical treatments for vitiligo are marginal with a 40-60% response rate which does not guarantee full repigmentation. Understanding the pathogenesis of vitiligo will allow better targets for treatment.
Previous analysis of skin biopsies have found several of the changes in gene expression occurred in immune regulation, DNA replication and repair, oncogenes, signal transducers and transcription factors. These results give us insight as to what happens in lesional vs nonlesional skin which contains the epidermis, dermis, fat, blood vessels and immune cells.
We have the technology today to study specific cell populations from tissue by the use of laser capture microdissection. We propose to use this technique to study the keratinocyte population in vitiligo skin because past evidence suggests that they may play a role. In addition, the role keratinocytes in vitiligo may be important for treatment as this would be the ideal target for therapy. Keratinocytes have been studied in vitiligo.
The aim of the study is to isolate keratinocytes from normal skin, perilesional and lesional skin in vitiligo patients by laser capture microdissection and characterize their gene expression profile by gene microarray analysis and to compare keratinocyte gene expression in normal, perilesional and lesional vitiligo skin before and after narrow band UVB treatment.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Patients should have non-treated symmetrically active vitiligo for 3 months.
Key exclusion criteria (1 listed)
- Less than 18 years old and older that 65, pregnant women, segmental or nonactive vitiligo, patients treated for vitiligo in past 3 month, patients on topical steroid medications, topical tacrolimus or elidel, patients receiving ultraviolet therapy including narrow band UVB, PUVA or tanning beds.
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 |
|---|---|---|
| Narrow Band UVB Treatment | Drug | – |
Primary outcome
Once genes profiling in keratinocytes between lesional and nonlesional skin is accomplished, we would like to characterize these keratinocyte populations after therapy.
1 secondary outcome
Keratinocytes have not been studied by gene expression analysis in this setting. The results from microarray analysis will be useful to see if the difference between lesional and nonlesional gene expression is reversed by therapy.
Results and safety
The study was stopped early. Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 10 Jul 2012.
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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.
Mimi Cho, MD, PhD principal investigator
University of Minnesota
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Narrow Band UVB Treatment in people with Vitiligo, run by Mimi Cho, MD 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 1 inclusion and 1 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: stopped early, as of the sponsor's last update on 10 Jul 2012. 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 was stopped early. Results are not available in the source record.
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?
Once genes profiling in keratinocytes between lesional and nonlesional skin is accomplished, we would like to characterize these keratinocyte populations after therapy.. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 10 Jul 2012.