Personal profile
Research Interests
Neuro-immunology in brain health and disease
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Area of Expertise
The overarching theme of my research program is to discover novel therapeutics that can reverse immune-mediated neurological dysfunction. My Ph.D. training involved the elucidation of myelin-reactive CD8 T-cells and their ability to target myelin-specific CD4 T-cells. By targeting these putative neuro-pathogenic cells, we could halt the progression of disease in a model of multiple sclerosis (MS). During this time, I became conversant with cellular and molecular immunological techniques, which I employed in murine and human MS studies. My postdoctoral research elucidated the role of B-cells in ischemia-induced brain injury. My postdoctoral fellowship included advanced training in several neuroscientific techniques such as behavior/motor function analysis, in vitro ischemic models, and in vivo stroke models. Now, I am employing the skills and expertise from these two distinct fields, using multi-organismal approaches with the singular focused purpose of reversing primary and secondary (immune-mediated) neurological dysfunction. My overall research goals are to: 1) Identify the role of neuronal-reactive CD8 T-cells in secondary immune-mediated stroke neuropathology. 2) Determine how myelin-reactive CD8 T-cells contribute to functional recovery in multiple sclerosis. 3) Identify other disease targets where myelin-reactive CD8 T-cells can be used as therapies.
Techniques
In vitro - cell culture, flow cytometry, Immunohistochemistry, elisa, spatial transcriptomics, human tissue samples
In Vivo - animal models, surgery, cognitive/memory/sensory/motor performance assay, and cerebral organoids
Education/Academic qualification
MS Biomedical Sciences, Barry University
BS Biology, University of Dallas
Ph.D. Integrative Biology, University of Texas Southwestern Medical Center
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Letter: Does Mechanism of Injury Affect Recovery After Sport-Related Concussion in Basketball? A Pilot Study
Dickerman, R., Bennett, M. & Ortega, S., 1 Sep 2025, In: Neurosurgery. 97, 3, p. e80-e81Research output: Contribution to journal › Letter › peer-review
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In Vitro Methotrexate as a Practical Approach to Selective Allodepletion
Sathe, A., Ortega, S. B., Mundy, D. I., Collins, R. H. & Karandikar, N. J., Jun 2007, In: Biology of Blood and Marrow Transplantation. 13, 6, p. 644-654 11 p.Research output: Contribution to journal › Article › peer-review
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The disease-ameliorating function of autoregulatory CD8 T cells is mediated by targeting of encephalitogenic CD4 T cells in experimental autoimmune encephalomyelitis
Ortega, S. B., Kashi, V. P., Tyler, A. F., Cunnusamy, K., Mendoza, J. P. & Karandikar, N. J., 1 Jul 2013, In: Journal of Immunology. 191, 1, p. 117-126 10 p.Research output: Contribution to journal › Article › peer-review
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Clonal composition of neuroantigen-specific CD8+ and CD4+ T-cells in multiple sclerosis
Biegler, B. W., Yan, S. X., Ortega, S. B., Tennakoon, D. K., Racke, M. K. & Karandikar, N. J., May 2011, In: Journal of Neuroimmunology. 234, 1-2, p. 131-140 10 p.Research output: Contribution to journal › Article › peer-review
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Glatiramer acetate (GA) therapy induces a focused, oligoclonal CD8+ T-cell repertoire in multiple sclerosis
Biegler, B. W., Yan, S. X., Ortega, S. B., Tennakoon, D. K., Racke, M. K. & Karandikar, N. J., Nov 2006, In: Journal of Neuroimmunology. 180, 1-2, p. 159-171 13 p.Research output: Contribution to journal › Article › peer-review