Microbiome and Ocular Inflammatory Disease
Overview
- Phase
- Not Applicable
- Intervention
- Affected
- Conditions
- Uveitis
- Sponsor
- National Eye Institute (NEI)
- Enrollment
- 131
- Locations
- 1
- Primary Endpoint
- The primary outcome is principal component analysis using the unweighted UniFrac distance metric of microbial composition; the significance between groups will be tested by the Adonis method (http://qiime.org/tutorials/category_comparison.html).
- Status
- Completed
- Last Updated
- yesterday
Overview
Brief Summary
Background:
- Uveitis is a general term describing a group of inflammatory diseases of the eye. The causes of uveitis are not fully understood. Researchers want to look at bacteria in the body that might be related to the inflammation. They will study the natural bacteria present in the gut and intestines of people with and without uveitis to understand their potential role in these diseases.
Objectives:
- To study the intestinal bacteria in people with and without uveitis or ocular inflammatory disease.
Eligibility:
- Individuals at least 18 years of age who have uveitis or ocular inflammatory disease.
- Individuals at least 18 years of age without uveitis or ocular inflammatory disease to serve as healthy controls.
Design:
- Participants may have more than one study visit (approximately 2-4) to assess possible changes in microbiome composition associated with treatment or disease activity.
- At each visit, participants will have a full eye examination, including vision and eye pressure tests. They will provide blood samples for testing. Participants will also be provided a stool collection kit to take home. The samples may be sent or brought back to the clinic.
- Treatment will not be provided as part of this study.
Detailed Description
Objective: What precipitates ocular inflammatory episodes remains unknown, but a possible potentiating factor is the microbiome. The microbiome has become increasingly studied with the advent of new techniques, but these have not been applied to uveitis. We wish to evaluate microbiome composition in patients with the ocular inflammatory diseases uveitis who may be on standard therapy or receiving orally-administered tolerizing antigen therapy. Study Population: A total of 200 participants may be enrolled in this study. Of those participants, the goal is to enroll 50 healthy controls and 150 with various types of uveitis. Design: This is an observational, prospective, single-center study. Participants will receive a complete ocular examination with clinical testing as determined clinically and will provide stool and blood samples using a standardized method. Participants may have multiple visits and may provide multiple samples in order to evaluate changes in microbiota composition with disease status or treatment. Outcome Measures: Alterations in bacterial diversity, microbiota composition and changes in relative abundance of various taxa or species will be analyzed between healthy volunteers and participants and between various types of uveitis. In addition, comparisons will be made between these findings and the immunome and metabolome.
Investigators
Eligibility Criteria
Inclusion Criteria
- •INCLUSION CRITERIA:
- •Inclusion Criteria for Uveitis Participants
- •Participant must be 18 years of age or older.
- •Participant must have a diagnosis of:
- •Uveitis (or ocular inflammatory disorder)
- •Participant must be able to undergo slit lamp biomicroscopy.
- •Participant must understand and sign the protocol s informed consent document.
- •Inclusion Criteria for Healthy Volunteers
- •Participant must be 18 years of age or older.
- •Participant must be able to undergo slit lamp biomicroscopy.
Exclusion Criteria
- •Exclusion Criteria for Uveitis Participants
- •Participants who are unable to provide informed consent.
- •Recent (\<3 months prior) use of any antibiotic therapy
- •Current consumption of probiotics
- •Current extreme diet (parenteral nutrition, macrobiotic diet, etc.)
- •Known gastrointestinal (GI) tract neoplasm
- •Recent GI tract infection (gastroenteritis, colitis, diverticulitis, appendicitis) within the last month
- •Chronic unexplained diarrhea
- •Participant has or had a significant active infection (an infection requiring treatment as determined by the investigator) that required systemic antibiotic treatment within the past three months
- •Participant has any GI tract surgery leaving permanent residua (e.g., gastrectomy; bariatric surgery; colectomy)
Arms & Interventions
Affected
Participants with various types of uveitis
Healthy controls
Participants without uveitis
Outcomes
Primary Outcomes
The primary outcome is principal component analysis using the unweighted UniFrac distance metric of microbial composition; the significance between groups will be tested by the Adonis method (http://qiime.org/tutorials/category_comparison.html).
Time Frame: ongoing
The primary outcome is principal component analysis using the unweighted UniFrac distance metric of microbial composition; the significance between groups will be tested by the Adonis method (http://qiime.org/tutorials/category\_comparison.html).
The primary outcome is principal component analysis using the unweighted UniFrac distance metric of microbial composition; the significance between groups will be tested by the Adonis method (http://qiime.org/tutorials/category_comparison.html).
Time Frame: ongoing
The primary outcome is principal component analysis using the unweighted UniFrac distance metric of microbial composition; the significance between groups will be tested by the Adonis method (http://qiime.org/tutorials/category\_comparison.html).
Secondary Outcomes
- Abundance differences between groups at the level of individual phylotypes(ongoing)
- Abundance of microbial modules(ongoing)
- Differences in lymphocyte and monocyte activation by different bacterial populations from the human microbiome results(ongoing)