MGT005 is a natural history study to collect longitudinal prospective data from patients with Leber Congenital Amaurosis associated with defects in RPE65.
Leber Congenital Amaurosis (LCA) is a diagnosis for a group of severe, autosomal recessively inherited rod - cone dystrophies that typically result in complete visual loss in the third or fourth decade of life. One form, LCA2, is caused by a mutation in the gene encoding RPE56, an RPE-specific 65-kDa isomerase. Non-functional RPE65 results in photoreceptor cells that are unable to respond to light resulting in these patients being visually impaired. In preparation for human clinical trials, a detailed prospective phenotypic study will be undertaken to investigate the natural history of RPE65-LCA. Such a study will help identify suitable patients for therapeutic intervention. Furthermore through greater phenotyping an optimal window for intervention and specific parameters to help quantify effect and identify clinical end points may have been ascertained .
Study Type
OBSERVATIONAL
Enrollment
37
Kellogg Eye Center
Ann Arbor, Michigan, United States
Moorfields Eye Hospital
London, United Kingdom
Analysis of retinal structure and function
Retinal structure will be analysed using Adaptive optics and SD-OCT and Fundal autofluorescence. This will be correlated with assessment of visual acuity, psychophysical visual assessment, visual mobility, retinal sensitivity and visual fields
Time frame: 6 years
Quality of Life Questionnaires
Assessment of Visual impairment using appropriate, validated questionnaires
Time frame: 6 years
Retinal Sensitivity
To be assessed in Microperimetry
Time frame: 6 years
Retinal Structural analysis
Retinal Structure analysis with Adaptive Optics
Time frame: 6 years
Fundal Autofluorescence
Presence or Absence
Time frame: 6 years
Assessment of Visual Fields
Assessment of Visual Fields with analysis of hill of vision
Time frame: 6 years
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