This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Examination Of Vitiligo Skin Samples Before and After UVB Treatment

This study has been terminated.
American Skin Association
Information provided by (Responsible Party):
University of Minnesota - Clinical and Translational Science Institute ( Mimi Cho, MD ) Identifier:
First received: September 12, 2005
Last updated: July 9, 2012
Last verified: July 2012
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.

Condition Intervention
Vitiligo Drug: Narrow Band UVB Treatment

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
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

Resource links provided by NLM:

Further study details as provided by University of Minnesota - Clinical and Translational Science Institute ( Mimi Cho, MD ):

Primary Outcome Measures:
  • Once genes profiling in keratinocytes between lesional and nonlesional skin is accomplished, we would like to characterize these keratinocyte populations after therapy.

Secondary Outcome Measures:
  • 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.

Estimated Enrollment: 12
Study Start Date: November 2004
Study Completion Date: December 2005
Primary Completion Date: December 2005 (Final data collection date for primary outcome measure)
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.


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

Patients should have non-treated symmetrically active vitiligo for 3 months.

Exclusion Criteria:

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.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00177034

United States, Minnesota
University of Minnesota
Minneapolis, Minnesota, United States, 55455
Sponsors and Collaborators
Mimi Cho, MD
American Skin Association
Principal Investigator: Mimi Cho, MD, PhD University of Minnesota - Clinical and Translational Science Institute
  More Information

Responsible Party: Mimi Cho, MD Identifier: NCT00177034     History of Changes
Other Study ID Numbers: 0310M52823
Study First Received: September 12, 2005
Last Updated: July 9, 2012

Keywords provided by University of Minnesota - Clinical and Translational Science Institute ( Mimi Cho, MD ):

Additional relevant MeSH terms:
Pigmentation Disorders
Skin Diseases processed this record on August 23, 2017