Perelman School of Medicine at the University of Pennsylvania

Penn Institute for Immunology

Michael R. Betts

faculty photo
Associate Professor of Microbiology
Department: Microbiology
Graduate Group Affiliations

Contact information
402C Johnson Pavilion
3610 Hamilton Walk
Philadelphia, PA 19104
Office: 215-573-2773
Fax: 215-573-4446
BS (Zoology)
University of Maryland, 1990.
PhD (Microbiology and Immunology)
University of North Carolina, 1998.
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Description of Research Expertise

Research Interests
Human immune responses; Viral Immunology; HIV immunopathogenesis; Vaccine-induced immune responses.

Key words: HIV; T cell; Immune Response

Description of Research
My laboratory studies human T lymphocyte function in order to understand the role of these cells in controlling or eliminating viral pathogens and providing protection from infection. Our primary interest is in determining how and if the human CD8+ T cell response to HIV controls viral replication. We also study the immune response against a variety of other human pathogens, including Epstein-Barr virus, cytomegalovirus, influenza, and vaccinia virus. Importantly, the techniques we utilize can be applied to the study of the cell-mediated immune response against any human pathogen, including emerging pathogens and bioterrorism agents. We are also very interested in characterizing the human T cell response to various vaccine regimens against a variety of human pathogens designed to generate cell-mediated immunity in order to understand the underlying principles of vaccine-mediated immune protection.

Human T lymphocytes have numerous functions, including the ability to produce various cytokines and chemokines, as well as mediate cell death through perforin- or fas-mediated cytotoxicity. Our research utilizes the most cutting edge techniques to measure human T lymphocyte responses through the use of polychromatic flow cytometry. This technique allows for the simultaneous examination of up to 18 separate parameters on lymphocytes. By measuring multiple T cell functions simultaneously, we can characterize the complexity of the CD4+ and CD8+ T cell response to HIV, EBV, CMV, Flu, and vaccinia. Not surprisingly, the T cell responses to these different viruses are quite variable; however, common response patterns do exist, and the importance of these patterns in the control of viral replication is the subject of future studies.

The current direction within the lab is to determine the underlying mechanisms that control the cell fate and functional characteristics of HIV-specific T and B cells in the context of HIV infection and disease progression. Current studies in the lab in this regard are listed below with Laboratory personnel:

Lab personnel:
Morgan Reuter-Moslow, Postdoctoral Fellow. HIV-specific T cell immunity. T cell function in human lymph nodes; CD200-CD200R pathway interactions in human T lymphocytes.

Laura McLane, Postdoctoral Fellow. Expression, localization, and biochemical properties of the transcription factors T-bet and Eomesodermin within human T lymphocytes.

Korey Demers, Graduate Student-CAMB MVP. Role of T-bet and Eomesodermin transcription patterns in CD8+ T cell mediated control of HIV infection during acute and chronic infection.

Carolina Pombo Martinez, Graduate Student-CAMB MVP. Expression patterns of inhibitory receptors in human T cells in peripheral blood and lymph node in the context of HIV infection.

Irene Bukh, Graduate Student-VMD/PHD, CAMB MVP. Vaccine induced immune activation in rhesus macaques and SIV infection susceptibility.

Jamie Knox, Graduate Student- CAMB MVP. B cell dynamics in HIV infection. T-bet expression and function in B cell subsets in humans.

Emily Roberts, Graduate Student- IGG. Immune activation and SIV-specific CD4+ and CD8+ T cell response development in acute SIV infection.
Jay Gardner, Research Specialist

Selected Publications

Van Epps, P., Banks, R., Aung, H., Betts, M.R., Canaday, D.H.: Age related differences in polyfunctional T cell responses. Immun Ageing. Immun. Ageing 11: 14, 2014.

Herati, R.S., Reuter, M.A., Dolfi, D.V., Mansfield, K.D., Aung, H., Badwan, O.Z., Kurupati, R.K., Kannan, S., Ertl, H., Schmader, K.E., Betts, M.R., Canaday, D.H., Wherry, E.J.: Circulating CXCR5+PD-1+ response predicts influenza vaccine antibody responses in young adults but not elderly adults. J. Immunol. 193(7): 3528-337, 2014.

Christian, D.A., Koshy, A.A., Reuter, M.A., Betts, M.R., Boothroyd, J.C., Hunter, C.A.: Use of transgenic parasites and host reporters to dissect events that promote interleukin-12 production during toxoplasmosis. Infect. Immun. 82(10): 4056-67, 2014.

Buggert, M., Tauriainen, J., Yamamoto, T., Frederiksen, J., Ivarsson, M.A., Michaelsson, J., Lund, O., Hejdeman, B., Jansson, M., Sonnerbord, A., Koup, R.A., Betts, M.R., Karlsson, A.C.: T-bet and Eomes are differentially linked to the exhausted phenotype of CD8+ T cells in HIV infection. PLoS Pathogens 10(7): e1004251, 2014.

Knox, J.J., Cosma, G.L., Betts, M. and McLane, L.M.: Characterization of T-bet and Eomes in peripheral human immune cells. Front. Immunol. 5: 217, 2014.

McLane, L.M., Banerjee, P.P., Cosma, G.L., Makedonas, G., Wherry, E.J., Orange, J.S., Betts, M.R.: Differential localization of T-bet and Eomes in CD8 T cell memory populations. J. Immunol. 190: 3207-15, 2013.

Manuel, S.L., Sehgal, M., Khan, Z.K., Goedert, J.J., Betts, M.R., Jain, P.: An altered maturation and adhesion phenotype of dendritic cells in diseased individuals compared to asympotomatic carriers of human T cell leukemia virus type 1. AIDS Res. Hum. Retro. 29: 1273-85, 2013.

Manuel, S.L., Sehgal, M., Connolly, J., Makedonas, G., Khan, Z.K., Gardner, J., Betts, M.R., Jain, P.: Lack of recall response to Tax in ATL and HAM/TSP patients but not in asymptomatic carriers of human T-cell leukemia virus type 1. J. Clin. Immunol. 33(7): 1223-39, 2013.

Novais, F.O., Carvalho, L.P., Graff, J.W., Beiting, D.P., Ruthel, G., Roos, D.S., Betts, M.R., Goldschmidt, M.H., Wilson, M.E., de Oliveira, C.I., Scott, P.: Cytotoxic T cells mediate pathology and metastasis in cutaneous leishmaniasis. PLoS Pathog. 9(7): e1003504, 2013.

Fretsch M, Stark R, Matzmohr N, Meier S, Durlanik S, Schulz AR, Stervbo U, J├╝rchott K, Gebhardt F, Heine G, Reuter MA, Betts MR, Busch D, Thiel A.: CD40L expression permits CD8+ T cells to execute immunologic helper functions. Blood 122: 405-412, 2013.

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Last updated: 12/11/2017
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