Characterization of the Facial and Gut Microbiome in Rosacea

Study Overview
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Brief Summary
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Questionnaires will be completed by each member of the twin set. A board-certified dermatologist will examine each member to categorize the type and severity of their rosacea. The facial and gut microbiome will be sampled and sent for microbial analysis.

Detailed Description
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Twin set subjects will be administered a questionnaire regarding demographics (age, gender, state of residence, time lived together, birth order), rosacea duration, prior rosacea treatment, diet (and similarity of diet to twin), co-morbidities, signs and symptoms suggestive of cardiovascular or gastrointestinal disease/disorder. Subjects will be examined by a board-certified dermatologist and global assessment, inflammatory counts and clinician's erythema score will be performed. Eyes will be examined for signs of ocular rosacea. Facial microbiome sampling will be performed on-site utilizing a kit manufactured by UBiome. The skin with active rosacea will be swabbed and the swab immediately placed in sample medium. The tube is then shipped to the manufacturer for 16s rRNA shotgun metagenomics to identify resident bacterial genera and species. (16) This can be compared to their extensive library of normal controls, to the other member of the twin set and to acne subjects. Subjects will be given a fecal microbiome kit for home sampling. Feces obtained from toilet paper is collected and placed in the sample medium. Subjects can either ship directly or return to the study site for shipping.

Official Title
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Characterization of the Facial and Gut Microbiome in Identical and Fraternal Twins With Rosacea; Comparison to Healthy Controls

Conditions
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Rosacea

Intervention / Treatment
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* Other: comparison of twin A to twin B


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Presenting with monozygotic or dizygotic twin One or both twins with facial rosacea Willingness to allow facial and fecal samples to be analyzed - Exclusion Criteria: Non-twin siblings Absence of facial rosacea in both twins -
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| twin A<br>Sampling of the facial and fecal microbiome | Other: comparison of twin A to twin B<br>* Comparison of Twin A to Twin B<br>|
| twin B<br>Sampling of the facial and fecal microbiome | Other: comparison of twin A to twin B<br>* Comparison of Twin A to Twin B<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Characterization of the facial and fecal microbiome of monozygotic or dizygotic twins with facial rosacea | Characterization of the facial and fecal microbiome in monozygotic or dizygotic twins concordant or discordant for rosacea compared to a) each other, b) microbiome library of age-matched controls | Single sampling of facial microbiome done on site over a 2-day Festival August 5 and 6, 2017. |