An observational study in Corneal Dystrophies, Hereditary and Corneal Disease, sponsored by National Eye Institute (NEI). Completed at 6 sites in 3 countries. Open to participants aged 4 Years and older. Per ClinicalTrials.gov, last updated 2019-12-12.
Sponsored by National Eye Institute (NEI) · Observational
This study will explore the clinical and hereditary (genetic) features of corneal dystrophy and other inherited corneal disease. Corneal dystrophy is clouding of the cornea - the transparent part of the eye covering the iris and pupil that passes light to the back of the eye. When the cornea becomes cloudy, interfering with the passage of light, vision may be impaired or lost. Corneal problems may occur with vision problems alone, or with other problems, such as changes in facial appearance or bone or joint problems. A better understanding of these genetic conditions may help in the development of better diagnostic tests and methods of disease management.
Patients with corneal dystrophies and related corneal disease and their family members may be eligible for this study. Participants will be drawn from patients enrolled in other studies of corneal dystrophy at the NEI and collaborating clinics.
Participants will undergo the following tests and procedures:
Objective: This project, Clinical and Molecular Studies in Families With Corneal Dystrophy or Other Inherited Corneal Diseases will study the inheritance of corneal dystrophy and other inherited corneal diseases, both Mendelian and complex in order to identify the genes that, when mutated, cause corneal disease and the pathophysiology through which they act.
Study Population: Families of many nationalities and ethnic backgrounds. We will study a maximum or 2,000 patients and family members.
Design: The study consists of ascertaining individuals, and especially families with multiple individuals, affected by corneal dystrophy and other inherited corneal diseases. These patients and their families will undergo detailed ophthalmological examinations to characterize their corneal disease and determine their affectation status. A blood sample will be collected from each individual for isolation of DNA and in some individuals for lymphoblastoid transformation to establish a renewable source of DNA. Linkage analysis, physical mapping, and mutational screening will be carried out to identify the specific the gene and the mutations in it that are associated with corneal disease in this family. If necessary, the gene product will be characterized biochemically. All associate investigators will carry out patient ascertainment, diagnosis, and sample referral, and in some cases molecular genetic analyses. The study will enroll subjects at NEI and collaborating institutions.
Outcome Measures: Linkage will be determined using the lod score method and mutations in specific genes will be assessed using a combination of residue conservation, blosum score, and molecular modeling. Biochemical, metabolic, and physiological effects will be individualized to the specific assay.
58 studies on the registry are indexed under Corneal Dystrophies, Hereditary; 11 are open to participants now.
This study's enrollment of 86 is below the median of 213 across 20 observational studies indexed under Corneal Dystrophies, Hereditary.
Browse Corneal Dystrophies, Hereditary studies →National Eye Institute (NEI) is the lead sponsor of 266 studies on the registry; 17 are open to participants now.
Of its 8 completed or terminated interventional studies of FDA-regulated products, 8 (100%) have results posted.
Counted across the registry records on this site, refreshed daily.
Subjects with the following will be recruited:
EXCLUSION CRITERIA:
This study is completed, as verified in Jul 2016. You cannot join it, but the record below documents what was studied.
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Corneal Dystrophies, Hereditary→
National Eye Institute (NEI)