Eye and Immunogenetic Features of Sarcoidosis

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00379275
First received: September 20, 2006
Last updated: March 5, 2008
Last verified: December 2007
  Purpose

This study will evaluate patients with sarcoidosis to understand how the disease affects the body. Sarcoidosis is a disease that results from inflammation of body tissues. The lungs, lymph nodes in the chest, skin and eyes are most commonly affected. As the disease progresses, small lumps, or granulomas, appear in the affected tissues. In most cases, the granulomas clear up, but in cases where they do not heal and disappear, the tissues tend to remain inflamed. Eye inflammation (uveitis) associated with sarcoidosis can cause various eye diseases, sometimes leading to blindness. This study will examine the clinical, immunological and genetic features of ocular sarcoidosis.

Patients 6 years of age and older with sarcoidosis may be eligible for this study. Candidates are screened with the following procedures:

  • Completion of a questionnaire with medical, social and demographic information
  • Blood draw for laboratory tests
  • Complete eye examination, including measurement of eye pressure and dilation of the pupils to examine the back of the eye. Fluorescein angiography may be done. This test involves injecting a dye into a vein in the arm. The dye travels to the blood vessels in the eyes. A camera flashes a blue light into the eye and takes pictures of the retina that show whether the dye has leaked from the blood vessels into the retina. Other photographs of the eye may also be taken using a special camera.

Participants are followed in conjunction with their local eye doctor as required by the status of their disease. Patients whose disease is stable are seen for an initial examination and followed every 12 months for 3 years.


Condition
Sarcoidosis
Uveitis

Study Type: Observational
Official Title: Ocular and Immuno-Genetic Manifestations of Sarcoidosis

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 100
Study Start Date: September 2006
Estimated Study Completion Date: December 2007
  Hide Detailed Description

Detailed Description:

BACKGROUND

Sarcoidosis is a multi-systemic granulomatous disease. The lungs, thoracic lymph nodes, the skin and the eyes are the most commonly affected organs. Most patients with sarcoidosis present with respiratory symptoms. Sarcoid uveitis is usually suspected when ocular inflammation is found in conjunction with suggestive serological and radiological studies. Currently, the diagnosis of sarcoidosis requires the demonstration of non-caseating granulomas on biopsy; but even this is not always diagnostic; more sensitive and specific noninvasive tools are needed.

Ophthalmic involvement has been reported in as many as 40% of patients with sarcoidosis, but most series report ophthalmic findings in approximately 25% of patients who develop chronic, systemic sarcoidosis. Uveitis associated with sarcoidosis can be very diverse, including: acute non-granulomatous or chronic granulomatous iridocyclitis, vitritis, retinal vasculitis, choroiditis with choroidal granulomas and papillitis secondary to optic nerve granulomas; and it can cause ocular morbidity due to a high incidence of glaucoma and cataracts. Other ophthalmic findings include lacrimal gland enlargement, secondary Sjogren's disease, scleritis, orbital gland involvement, secondary proliferative retinopathy, subretinal neovascularization, and optic neuropathy.

To better evaluate and diagnose patients, we also need to improve our ability to predict susceptibility and prognosis, especially among African-Americans. Current epidemiologic studies of sarcoidosis indicate that in the United States, African Americans have about a threefold higher age-adjusted annual incidence, 35.5/100,000, compared with Caucasians, 10.9/100,000. In addition, African Americans with chronic sarcoidosis are more likely to develop ocular manifestations than whites. The study of ocular sarcoidosis is important because it is a leading inflammatory cause of blindness and ocular morbidity. In large surveys of patients with uveitis, approximately 5% of patients were found to have ocular sarcoidosis, and approximately 10% of these patients become blind in at least one eye.

AIMS:

AIM 1: CLINICAL ANALYSIS:

Documentation of:

  1. Clinical features of sarcoidosis associated uveitis
  2. Chronological association of ocular disease to histopathologic diagnosis of sarcoidos
  3. Family history of sarcoidosis
  4. Previous therapies and response
  5. Ocular status compared with systemic disease status, current and historical Environmental exposure history

AIM 2: IMMUNOLOGICAL ANALYSIS:

One of the goals of this study is to determine the diagnostically important cytokines in biopsy-proven ocular sarcoidosis.

The chemokine profile of the Peripheral Blood Mononuclear Cells and Broncho-Alveolar Lavage Fluid (BALF) of pulmonary sarcoidosis patients has been reported and many cytokines have been implicated in the pathogenesis of this disease.

  1. Serum Level for

    A. TNF alpha

    B. MIP-1 alpha

    C. IL-8

    D. IL-2

    E. TGF Beta

    F. INF gamma

  2. Immunophenotyping of whole blood cells and BALF by flow cytometry

    Focus on:

    A. T cell sub-typing (examples: CD4, CD8)

    B. NK cell sub-typing (examples:CD56, KIR)

  3. TLRs sub-typing

AIM 3: GENETIC ANALYSIS:

Serum analysis for HLA Class I and II typing

A cohort of 100 patients with biopsy-proven sarcoidosis will be recruited from the Uveitis and Ocular Immunology Clinic at the National Eye Institute and the Pulmonary Clinic at the National Heart Lung and Blood Institute.

FUTURE AIMS:

We aim to characterize the TLR activation profile in patients with ocular sarcoidosis, and compare them to patients with pulmonary sarcoidosis and normal volunteers. Using this immuno-genetic classification scheme, in conjunction with HLA typing, we hope to develop novel diagnostic and/or prognostic criteria for sarcoidosis. In addition, the TLR activation profile may allow risk stratification for different sarcoidosis phenotypes.

METHODS:

A cohort of 100 patients with biopsy-proven sarcoidosis will be recruited from the Uveitis and Ocular Immunology Clinic at the National Eye Institute and the Pulmonary Clinic at the National Heart Lung and Blood Institute. After obtaining informed consent, the patients will be invited to participate in the study. After appropriate enrollment, they will undergo the following

  1. Completion of a questionnaire, with medical, social and demographic data
  2. A complete ophthalmologic examination
  3. Baseline serologic analysis
  4. Baseline serum analysis for immunologic analysis
  5. HLA-Typing
  6. Patients who are quiescent will be seen at baseline with a second visit at 1 year
  7. Patients who are active will be treated appropriately, by their referring ophthalmologist or on a treatment protocol at the National Eye Institute
  Eligibility

Ages Eligible for Study:   6 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

    1. Participants must be at least 6 years old
    2. Participants must have biopsy-proven sarcoidosis
    3. Participant must be able to consent to participating in the protocol
    4. For minors, consent by an adult will be necessary

EXCLUSION CRITERIA:

We will exclude participants who are unable or unwilling to give blood at the designated times in the protocol

  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00379275

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00379275     History of Changes
Other Study ID Numbers: 060239, 06-EI-0239
Study First Received: September 20, 2006
Last Updated: March 5, 2008
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Sarcoidosis
Uveitis
Pulmonary Sarcoidosis
HLA-Typing
Cytokines
Serum Markers

Additional relevant MeSH terms:
Sarcoidosis
Uveitis
Chorioretinitis
Lymphoproliferative Disorders
Lymphatic Diseases
Uveal Diseases
Eye Diseases
Retinitis
Retinal Diseases
Choroiditis
Choroid Diseases
Uveitis, Posterior
Panuveitis

ClinicalTrials.gov processed this record on April 17, 2014