Ali H. Ellebedy, Ph.D.

Associate Professor
Pathology and Immunology

Immunology Program
Molecular Microbiology and Microbial Pathogenesis Program

  • 314-747-0691


  • Defining the cellular and molecular mechanisms that regulate memory B cell heterogeneity and fate.

Research Abstract:

The ability of B cells to expand and differentiate into memory and plasma cells in response to antigenic stimulation underlies the success of most - if not all - vaccines currently in use. Despite this, and the fact that we have known about humoral immunity for centuries, we still do not have a thorough understanding of how the fate of responding B cell is determined, and how the longevity of the response is controlled. My long -term goal is to establish an independent research program that aims at addressing the following questions:
1) What are the cellular and molecular mechanisms that regulate memory B cell generation and maintenance?

2) What are the different subsets of human memory B cells that are elicited by influenza vaccination? How do they contribute to protection?

3) What are the rules for eliciting broadly neutralizing B cell responses against rapidly evolving pathogens, such as influenza viruses?

Selected Publications:

A Case of Human Lassa Virus Infection With Robust Acute T-Cell Activation and Long-Term Virus-Specific T-Cell Responses. McElroy AK, Akondy RS, Harmon JR, Ellebedy AH, Cannon D, Klena JD, Sidney J, Sette A, Mehta AK, Kraft CS, Lyon MG, Varkey JB, Ribner BS, Nichol ST, Spiropoulou CF. J Infect Dis. 2017 Jun 15;215(12):1862-1872. doi: 10.1093/infdis/jix201. PMID: 28863472

In Vivo Imaging of Influenza Virus Infection in Immunized Mice. Czakó R, Vogel L, Lamirande EW, Bock KW, Moore IN, Ellebedy AH, Ahmed R, Mehle A, Subbarao K. MBio. 2017 May 30;8(3). pii: e00714-17. doi: 10.1128/mBio.00714-17. PMID: 28559489

An Amphibian Host Defense Peptide Is Virucidal for Human H1 Hemagglutinin-Bearing Influenza Viruses. Holthausen DJ, Lee SH, Kumar VT, Bouvier NM, Krammer F, Ellebedy AH, Wrammert J, Lowen AC, George S, Pillai MR, Jacob J. Immunity. 2017 Apr 18;46(4):587-595. doi: 10.1016/j.immuni.2017.03.018. PMID: 28423338

Defining antigen-specific plasmablast and memory B cell subsets in human blood after viral infection or vaccination.
Ellebedy AH, Jackson KJ, Kissick HT, Nakaya HI, Davis CW, Roskin KM, McElroy AK, Oshansky CM, Elbein R, Thomas S, Lyon GM, Spiropoulou CF, Mehta AK, Thomas PG, Boyd SD, Ahmed R. Nat Immunol. 2016 Oct;17(10):1226-34. doi: 10.1038/ni.3533. Epub 2016 Aug 15. PMID: 27525369

Multi-epitope Models Explain How Pre-existing Antibodies Affect the Generation of Broadly Protective Responses to Influenza. Zarnitsyna VI, Lavine J, Ellebedy A, Ahmed R, Antia R. PLoS Pathog. 2016 Jun 23;12(6):e1005692. doi: 10.1371/journal.ppat.1005692. eCollection 2016 Jun. PMID: 27336297
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