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 Duke Appointments & Affiliations
Joseph A.C. Wadsworth Distinguished Professor of Ophthalmology
·
2026 - Present
Ophthalmology, Vitreoretinal Diseases & Surgery,
Ophthalmology
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 Scholarly Works
Liver X Receptor Alpha Deficiency Primes Retinal Degeneration, but Aging Drives Disease Severity.
Journal article Am J Pathol · July 2, 2026 Liver X receptor alpha (LXRα) regulates serum cholesterol and lipoprotein levels under homeostatic conditions and in response to dietary fat. Previously, aged Lxrα-/- mice fed a standard diet were shown to develop phenotypes resembling early age-related ma ... Full text Link to item CiteMini-Series Title: "Nuclear Receptors in Ocular Health and Disease: Therapeutic Horizons from Cornea to Retina" Title: "Nuclear Receptors: The Eye's Hidden Gatekeepers of Inflammation, Lipids, and Repair" Part 1: Setting the Stage.
Journal article J Ocul Pharmacol Ther · May 2026 Full text Link to item CiteClosing Reflections from the Editor-in-Chief of Current Eye Research for the Posterior Segment.
Journal article Curr Eye Res · January 2026 Full text Link to item CiteRecent Grants
Duke Ophthalmology Mentored Physician Scientist Program
Inst. Training Prgm or CMEMentor · Awarded by National Institutes of Health · 2026 - 2031Cell and Molecular Biology Training Program
Inst. Training Prgm or CMEMentor · Awarded by National Institute of General Medical Sciences · 2026 - 2031Deciphering the role of osteopontin in the aging eye and age-related macular degeneration
ResearchPrincipal Investigator · Awarded by National Institutes of Health · 2023 - 2027View All Grants
Education
University of Alabama, Birmingham ·
2002
Ph.D.