Tania Watts

Tania Watts PhD
Tania Watts
Contact Info
T: (416) 978-4551
St. George Campus
University of Toronto, Medical Sciences Building
1 King's College Circle, Room 7221
Toronto, ON, M5S1A8
Grad Students Must First Apply Through Department
Director, Faculty of Medicine flow cytometry facility
Associate Chair, Post-Doctoral Program
Research Interests
Adaptive Immunity, Infectious Diseases, T-cells

TNFR family members and TRAF proteins in viral infection, inflammation and cancer

Upon an infection, the innate and then the adaptive immune system are rapidly ramped up to control and then clear the infection. T cell activation requires the recognition of an antigen-MHC complex by the T cell receptor (signal 1) along with a costimulatory signal from CD28 (signal 2) and additional signals from cytokines (signal 3). When T cells are activated, they upregulate members of the tumor necrosis factor receptor (TNFR) superfamily. Our laboratory has had a long-standing interest in this family of receptors, which play important roles in controlling life and death in the immune system (1-3). TNFR family members on T cells binding to TNF superfamily ligands on inflammatory antigen presenting cells, provide a critical post-priming checkpoint (signal 4), to allow T cell accumulation during viral infection (4). A current focus is to understand how type I interferons induce distinct patterns of costimulatory molecule expression in different types of antigen presenting cell in mice and humans (4, 5). We are currently working to identify the signals induced by GITR and 4-1BB to sustain T cell activation, so that we can understand the unique and overlapping features of these costimulatory pathways.

Another area of interest is the role of TNFR family members in tissue resident memory T cells (Trm). Trm persist in the tissues after clearance of infection to provide a first line of defense upon re-infection. Our recent results show that 4-1BB is critical for the formation lung resident memory CD8 T cells (Trm) and that inclusion of 4-1BBL into a vaccine vector delivered intranasally greatly enhances the establishment of the Trm population and its persistence (6). We are currently investigating the mechanisms by which 4-1BB contributes to Trm formation.

My laboratory has a strong interest in T cell immunity in humans, with an emphasis on influenza and, more recently, SARS CoV-2. For example, we explored the state of T cell memory to influenza virus in older people and found that the memory CD8 T cells expressed markers of terminal differentiation and senescence commonly found in T cells specific for persisting pathogens such as CMV. (7) We also examined the state of immunity to A/2009 pandemic influenza in the Toronto population at 1 year post-pandemic. (8) We recently compared recall responses to SARS-CoV-2 antigens as compared to memory resposnes to influenza in patients that had recovered from COVID19. (9)

Another aspect of our work has been to investigate the role of TNFR associated factors (TRAFs) in TNFR signaling and human disease. TRAF1 has diverse roles in biology; it is a critical positive regulator of 4-1BB signaling,(10) however, it can negatively regulate TLR signaling to limit inflammation. (11) TRAF1 is also expressed in human lymphoma and chronic lymphocytic leukemia and an ongoing project in the lab involves a therapeutic approach to lower TRAF1 levels in cancer cells.

Tania Watts Research Diagram


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Our research is funded by a Canadian Institutes for Health (CIHR) Foundation Grant, CIHR and the Canadian Immunity task force for COVID19 research, and an Innovation grant from the Canadian Cancer Society Research Institute.

Our Lab

Tania Watts Lab Group Photo 2019

Publications and Awards

View PubMed search of this faculty member's recent publications.

Recent Publications

  1. Watts TH. TNF/TNFR family members in costimulation of T cell responses. Ann Rev Immunol 2005, 23: 23-68.
  2. Snell LM, Lin GH, McPherson AJ, Moraes TJ, Watts TH. T-cell intrinsic effects of GITR and 4-1BB during viral infection and cancer immunotherapy. Immunological reviews 2011, 244(1): 197-217. 10.1111/j.1600-065X.2011.01063.x
  3. Clouthier DL, Watts TH. TNFRs and Control of Chronic LCMV Infection: Implications for Therapy. Trends Immunol 2015, 36(11): 697-708. 10.1016/j.it.2015.09.005
  4. Chang YH, Wang KC, Chu KL, Clouthier DL, Tran AT, Torres Perez MS, Zhou AC, Abdul-Sater AA, Watts TH. Dichotomous Expression of TNF Superfamily Ligands on Antigen-Presenting Cells Controls Post-priming Anti-viral CD4(+) T Cell Immunity. Immunity 2017, 47(5): 943-958 e949. 10.1016/j.immuni.2017.10.014
  5. Girard M, Law JC, Edilova MI, Watts TH. Type I interferons drive the maturation of human DC3s with a distinct costimulatory profile characterized by high GITRL. Sci Immunol 2020, 5(53). 10.1126/sciimmunol.abe0347

    Full text: http://immunology.sciencemag.org/cgi/content/full/5/53/eabe0347?ijkey=i1yPaF.5yf0ZA&keytype=ref&siteid=immunology
  6. Zhou AC, Wagar LE, Wortzman ME, Watts TH. Intrinsic 4-1BB signals are indispensable for the establishment of an influenza-specific tissue-resident memory CD8 T-cell population in the lung. Mucosal Immunol 2017, 10(5):1294-1309. 10.1038/mi.201124
  7. Wagar LE, Gentleman B, Pircher H, McElhaney JE, Watts TH. Influenza-specific T cells from older people are enriched in the late effector subset and their presence inversely correlates with vaccine response. PloS one 2011,6(8): e23698. 10.1371/journal.pone.0023698
  8. Wagar LE, Rosella L, Crowcroft N, Lowcock B, Drohomyrecky PC, Foisy J, Gubbay J, Rebbapragada A, Winter AL, Achonu C, Ward BJ, Watts TH. Humoral and cell-mediated immunity to pandemic H1N1 influenza in a Canadian cohort one year post-pandemic: implications for vaccination. PloS one 2011, 6(11): e28063. 10.1371/journal.pone.0028063
  9. Law JC, Koh WH, Budylowski P, LIn J, Yue FY, Abe KT, Rathod B, Girard M, Li J, RIni JM, Mubareka S, McGeer A, CHan AK, Gingras A-C, *Watts TH, *Ostrowki M, authors js. Systematic examination of T cell responses to SARS-CoV-2 versus influenza virus reveals distinct inflammatory profile. medRxiv: 20202008202720183319 (Journal of Immunology in press).
  10. McPherson AJ, Snell LM, Mak TW, Watts TH. Opposing roles for TRAF1 in the alternative versus classical NF-kappaB pathway in T cells. The Journal of biological chemistry 2012, 287(27): 23010-23019. 1074/jbc.M112.350538
  11. Abdul-Sater AA, Edilova MI, Clouthier DL, Mbanwi A, Kremmer E, Watts TH. The signaling adaptor TRAF1 negatively regulates Toll-like receptor signaling and this underlies its role in rheumatic disease. Nat Immunol2017, 18(1): 26-35. 10.1038/ni.3618

Honours and Awards

2009-2019 Sanofi Pasteur Chair in Human Immunology (endowed chair)
2019 JJ Berry-Smith Doctoral Supervision Award (University of Toronto)
2018 Canadian Society for Immunology John D. Reynolds Award
2016 Canadian Society for Immunology Bernhard Cinader Award
2014 GSK Fast Track Challenge Winner
2006 Canadian Society for Immunology Investigator Award
1998-2003 Senior Scientist of the National Cancer Institute of Canada
1986-1991 Medical Research Council of Canada Scholar