Finding Genes Causing Inherited Glaucoma in Newborns and Infants
Identification of Glaucoma Genes by Exome Sequencing
The purpose of this study is to identify disease-causing gene(s) in two families with inherited primary congenital glaucoma (PCG). These families have already been screened for genes known to cause PCG, and no causative mutations were found. Therefore, identifying the disease-causing mutations in these families will result in the discovery of new glaucoma genes.
Drs. John Kuchtey, Rachel W. Kuchtey, and colleagues will study two families with inherited primary congenital glaucoma (PCG) to identify new disease-causing gene(s). The researchers will determine for each family member the DNA sequence (spelling) of all of the more than 20,000 genes in the human genome by a technique called “exome sequencing.” Spelling variations that have an inheritance pattern consistent with disease and cause functional changes will be flagged as new candidate disease genes. These candidates will then be sequenced in a second set of unrelated PCG patients for whom the disease-causing genes are also unknown. If the same genetic mutation is found in the unrelated families, this would provide validation that the candidate is likely the disease-causing gene.
As the hallmark symptom of PCG is severely elevated eye pressure, the new genes are likely to be involved in regulation of intraocular pressure. While it is known that increased intraocular pressure is a major risk factor for open-angle glaucoma, the molecular mechanisms are not known. Identification of a new glaucoma gene involved in increased eye pressure due to insufficient drainage of aqueous humor will improve the basic understanding of glaucoma, which may lead to more effective diagnosis and treatment of glaucoma for patients of all ages.
About the Researcher
Dr. John Kuchtey is currently a Research Assistant Professor at the Vanderbilt Eye Institute in Nashville, TN. Prior to Vanderbilt, he held positions at Case Western Reserve University in Cleveland, OH and Harvard Medical School in Boston, MA. His work focuses on identification of genes involved in glaucoma as a means to increase basic understanding of this disease, a major cause of vision loss and blindness worldwide.
First published on: July 10, 2012
Last modified on: June 14, 2012