Faculty

Ahmara Gibbons Ross, MD, PhD

faculty photo
Assistant Professor of Ophthalmology at the Hospital of the University of Pennsylvania
Department: Ophthalmology
Graduate Group Affiliations

Contact information
Scheie Eye Institute
51 N. 39th Street
Philadelphia, PA 19104
Office: 215-662-8715
Fax: 215-243-8825
Education:
BA
Bryn Mawr College, 2003.
PhD (Molecular Pharmacology/Structural Biology)
Thomas Jefferson University, 2011.
MD
Jefferson Medical College, 2011.
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Description of Research Expertise

My research interest focuses on understanding the genetic basis of glaucoma and using this information to develop novel drugs for the treatment of optic neuropathies. My long-term goal is to address hindrance of compliance to the clinical management of glaucoma with adeno-associated vector gene targets. To date, I have worked in three different areas of research: understanding
mechanisms of programmed cell death, developing drugs to control this process, and finally developing a knock-out mouse models using advanced cloning methods. After completing two fellowships in Neuro-ophthalmology and Glaucoma, I am pursuing these same mechanisms of extracellular cross talk and intracellular anti-apoptotic pathways to treat diseases involved in optic nerve degeneration and cell protection. It is my goal to develop gene-transfer techniques to reverse the process of optic nerve cell death in glaucoma. While my primary focus currently emphasizes the role of SIRT1 as a potential gene target to enhance retinal ganglion cell survive, my ultimate goal is to develop a strategy to replace gene mutations with viral gene
transduction in a cell targeted manner, with the aim of treating glaucoma at every cell type effected by
the disease.

Selected Publications

Chaqour B, Rossman JB, Meng M, Dine KE, Ross AG, Shindler KS.: SIRT1-based therapy targets a gene program involved in mitochondrial turnover in a model of retinal neurodegeneration. Sci Rep 15: 13585, Apr 2025.

Brown JS, Mumford S, Alexis DA, Ross AG, Higginbotham EJ.: Gender Differences in Patient-Physician Communication in Ophthalmic Practice, Pre- and Post-COVID-19 Period. Am J Ophthalmol 275: 114-120, Mar 2025.

O'Neill N, Khan RS, Abd Alhadi S, Dine KE, Geisler JG, Chaqour B, Ross AG, Shindler KS.: Mitochondrial Uncoupler, 2,4-Dinitrophenol, Reduces Spinal Cord Paralysis and Retinal Ganglion Cell Loss in the Experimental Autoimmune Encephalomyelitis Model of Multiple Sclerosis. Biomolecules 15: 189, Jan 2025.

Brahim Chaqour, Jacob B. Rossman, Miranda Meng, Kimberly E. Dine, Ahmara G. Ross & Kenneth S. Shindler: SIRT1-based therapy targets a gene program involved in mitochondrial turnover in a model of retinal neurodegeneration. Scientific Reports 2025 Notes: In review (pending electronic submission).

Suad Abd Alhadi, David Camacho, Brahim Chaqour, Jacob B. Rossman, Jennifer C. Pham, Kenneth S. Shindler, Ahmara G. Ross: Neuroprotective Effects of SIRT1 in Human RGCs Derived from iPSCs Following Oxidative Stress Induction at Early and Late Stages of Differentiation. Experimental Eye Research 2025 Notes: in submission/review with minor edits.

O'Neill N, Meng M, Chaqour B, Dine K, Sarabu N, Pham JC, Shindler KS, Ross AG: Comparison of SNCG and NEFH Promoter-Driven Expression of Human SIRT1 Expression in a Mouse Model of Glaucoma. Translational Vision Science Technology (TVST) 13(8), August 2024.

Meng M, Chaqour B, O'Neill N, Dine K, Sarabu N, Ying GS, Shindler KS, Ross AG: Comparison of Brn3a and RBPMS Labeling to Assess Retinal Ganglion Cell Loss During Aging and in a Model of Optic Neuropathy. Investigations Ophthalmology Vision Science (IOVS) 64(4), April 2024.

Verma SS, Gudiseva HV, Chavali VRM, Salowe RJ, Bradford Y, Guare L, Lucas A, Collins DW, Vrathasha V, Nair RM, Rathi S, Zhao B, He J, Lee R, Zenebe-Gete S, Bowman AS, McHugh CP, Zody MC, Pistilli M, Khachatryan N, Daniel E, Murphy W, Henderer J; Regeneron Genetics Center; Kinzy TG, Iyengar SK, Peachey NS; VA Million Veteran Program; Taylor KD, Guo X, Chen YI, Zangwill L, Girkin C, Ayyagari R, Liebmann J, Chuka-Okosa CM, Williams SE, Akafo S, Budenz DL, Olawoye OO, Ramsay M, Ashaye A, Akpa OM, Aung T, Wiggs JL, Ross AG, Cui QN, Addis V, Lehman A, Miller-Ellis E, Sankar PS, Williams SM, Ying GS, Cooke Bailey J, Rotter JI, Weinreb R, Khor CC, Hauser MA, Ritchie MD, O'Brien JM.: A multi-cohort genome-wide association study in African ancestry individuals reveals risk loci for primary open-angle glaucoma. Cell 187: 464-480, Jan 2024.

Brahim Chaqour, Kimberly Dine, Ahmara Gibbons Ross, Kenneth S Shindler: SIRT1-Based Gene Therapy Targets a Gene Program Involved in Mitochondrial Turnover in Experimental Autoimmune Encephalomyelitis. Invest. Ophthalmol. Vis. Sci. 65(7): 420, 2024.

Miranda Meng, Brahim Chaqour, Kimberly Dine, Jipeng Yue, Gui-Shuang Ying, Kenneth S Shindler, Ahmara Gibbons Ross: Comparing the Reliability of Manual Retinal Ganglion Cell Counting using Brn3a and RBPMS Labeling. Invest. Ophthalmol. Vis. Sci. 65(7): 2454, 2024.

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Last updated: 05/10/2025
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