Overview
Age-related macular degeneration (AMD) is the leading cause of central vision impairment amongst the elderly in the Western World and is becoming increasingly prevalent World-wide.
Our lab is focused on investigating the cellular and molecular pathogenic mechanisms underlying the three clinical subtypes of AMD. We are driven by a desire to further understand signaling pathways critical in initiation and progression of AMD and hopefully identify therapeutic targets for this debilitating degenerative disease. Two major lines of investigation currently being followed concomitantly include (1) elucidating the role of lipid-mediated injury of retinal pigment epithelial cells and how this injury promotes pathogenic changes in Bruch’s membrane and drusen formation, key features of the dry AMD subtype, through activation of the nuclear receptors peroxisome proliferator activated receptors and liver-X receptors and (2) investigating the role of the xenobiotic responsive aryl hydrocarbon receptor in regulating cellular metabolism in two other subtypes of AMD, geographic atrophy and neovascular AMD.
Our lab is focused on investigating the cellular and molecular pathogenic mechanisms underlying the three clinical subtypes of AMD. We are driven by a desire to further understand signaling pathways critical in initiation and progression of AMD and hopefully identify therapeutic targets for this debilitating degenerative disease. Two major lines of investigation currently being followed concomitantly include (1) elucidating the role of lipid-mediated injury of retinal pigment epithelial cells and how this injury promotes pathogenic changes in Bruch’s membrane and drusen formation, key features of the dry AMD subtype, through activation of the nuclear receptors peroxisome proliferator activated receptors and liver-X receptors and (2) investigating the role of the xenobiotic responsive aryl hydrocarbon receptor in regulating cellular metabolism in two other subtypes of AMD, geographic atrophy and neovascular AMD.
Current Appointments & Affiliations
Professor of Ophthalmology
·
2024 - Present
Ophthalmology, Vitreoretinal Diseases & Surgery,
Ophthalmology
Vice Chair of Academic Excellence and Engagement
·
2025 - Present
Ophthalmology,
Clinical Science Departments
Associate Professor of Cell Biology
·
2022 - Present
Cell Biology,
Basic Science Departments
Professor in Pathology
·
2024 - Present
Pathology,
Clinical Science Departments
Faculty Network Member of the Duke Institute for Brain Sciences
·
2014 - Present
Duke Institute for Brain Sciences,
University Institutes and Centers
Recent Publications
Reduced complex I activity in the retinal pigment epithelium, but not in rod photoreceptors, affects light signaling without impacting cell survival.
Journal Article J Biol Chem · September 2025 Mutations in the mitochondrial respiratory complex I accessory subunit NADH:ubiquinone oxidoreductase subunit S4 (ndufs4) can cause the mitochondrial disease Leigh syndrome, which may be associated with vision loss. We previously demonstrated that mice wit ... Full text Link to item CiteFeatures that distinguish age-related macular degeneration from aging.
Journal Article Exp Eye Res · May 2025 Age-related macular degeneration (AMD) is a complex, multifactorial retinal degenerative disease that is influenced by both genetic and environmental factors. However, the strongest risk factor for AMD is advanced age. Several physiological processes are o ... Full text Link to item CitePotential Role of NUR77 in the Aging Retinal Pigment Epithelium and Age-Related Macular Degeneration.
Journal Article Adv Exp Med Biol · 2025 The underlying mechanisms associated with age-related changes in the morphology and function of retinal pigmented epithelial (RPE) cells are poorly understood. The aging RPE progresses through several structural changes including loss of melanin granules, ... Full text Link to item CiteRecent Grants
Deciphering the role of osteopontin in the aging eye and age-related macular degeneration
ResearchPrincipal Investigator · Awarded by National Institutes of Health · 2023 - 2027Aging immune response in choroidal neovascularization
ResearchPrincipal Investigator · Awarded by VitreoRetinal Surgery Foundation · 2025 - 2026Low Dose Ionizing Radiation as a Potential Hormetic Treatment for Dry Age-related Macular
ResearchPrincipal Investigator · Awarded by VitreoRetinal Surgery Foundation · 2025 - 2026View All Grants
Education, Training & Certifications
University of Alabama, Birmingham ·
2002
Ph.D.