Department of Immunology

Edward A. Clark, Ph.D.


Dr. Clark received a Ph.D. in Microbiology and Immunology from the University of California, Los Angeles. After completing his postdoctoral research at University College London, he joined the faculty of the University of Washington in 1979.


Department of Microbiology
University of Washington
Office E343, Box 358059
750 Republican Street
Seattle WA 98109-8059
Phone: 206-543-8706
Fax: 206-685-7120


Adaptive Immune Responses
Tolerance & Autoimmunity
Innate Immunity


Graduate Students
Justin Theophilus Ulrich-Lewis,

Postdoctoral Fellows and Instructors
Natalia Giltiay, Research Assistant Professor, Division of Rheumatology (Clark Lab Affiliate),
Runa Kuley,
Kelsey Roe,

Laboratory Staff
Kevin Draves,
Daniela Giordano,
Ursula Holder,
Geraldine Shu,



Edward A. Clark



A major goal of Dr. Clark’s lab has been to define receptors and ligands regulating B cells and dendritic cells (DCs) and to help translate findings for use in clinical immunology. His lab helped discover and characterize human B cell/DC-associated surface molecules like CD20, CD22, CD40, CD80 (B7.1), CD150 (SLAM) and CD180 (RP105). Recently, the lab has focused on defining C-type lectin receptors (CLRs) on DCs and assessing immune responses after antigens (Ags) are targeted in vivo to receptors. Dr. Clark’s lab has coupled Ags to monoclonal antibodies (mAbs) specific for receptors including DCIR2 and BDCA2 that are selectively expressed on DC subsets. The Ag-mAb conjugates are inoculated into mice as a kind of ‘antigen-delivery system’, and depending on where the Ag is targeted, a different kind of immune response is programmed. When Ag is delivered to DCIR2+ DCs in splenic bridging channels, a rapid extrafollicular Ab response is induced but not germinal center formation unless a second signal is provided. When Ag is targeted to BDCA2 on plasmacytoid DCs, Ag-specific immunologic tolerance is induced. When Ag is targeted to CD180 expressed on both B cells and DCs, a strong protective immune response is induced that includes high affinity Abs and Ag-specific CD8 T cells. The lab is currently testing recombinant protein anti-CD180 based vaccines for treatment of patients with hepatitis B virus (HBV) and for protection against viruses like West Nile virus (WNV) and Zika virus. Dr. Clark has helped to found two successful biotech companies in Seattle, and from 2014-2016 was a UW Entrepreneurial Faculty Fellow. A current goal is to launch another company using the CD180-based platform technology.


  1. Chappell CP, Giltiay NV, Draves KE, Chen CK, Hayden-Ledbetter MS, Shlomchik MJ, Kaplan DH, Clark EA. Targeting antigens through blood dendritic cell 2 (BCDA2) on plasmacytoid dendritic cells promotes immunologic tolerance, J Immunol 192:5789-5801, 2014.
  2. Giordano D, Li C, Draves KE, Hohl T, Clark EA. Nitric oxide regulates B cell activating factor (BAFF) expression and T cell-independent antibody responses, J Immunol 193:1110-1120, 2014.
  3. Clark EA. Perspective: A short history of the B cell-associated surface molecule CD40. Frontiers Immunol 5:472, doi:10.3389/fimmu.2014.00472, 2014.
  4. Giltiay NV, Chappell CP, Sun X, Kolhatkar N, Teal TH, Kim J, Tanka L, Buechler MB, Hamerman JA, Imanishi-Kari T, Clark EA, Elkon KB. Overexpression of toll-like receptor 7 promotes cell-intrinsic expansion and autoantibody production by transitional T1 B cells, J Exp Med 210:2773-89, 2013.
  5. Chaplin JW, Chappell CP, Clark EA. Targeting antigens to CD180 rapidly induces antigen-specific IgG, affinity maturation and immunologic memory, J Exp Med 210:2135-2146, 2013.
  6. Ma DY, Suthar MS, Kasahara S, Gale M Jr, Clark EA. CD22 is required for protection against West Nile virus infection, J Virol 87: 3361-3375, 2013.
  7. Suthar MS, Ramos HJ, Brassil M, Netland J, Chappell CP, Blahnik G, McMillian, Diamond MS, Clark EA, Bevan MJ, Gale M Jr. The RIG-I-like receptor, LGP2 controls CD8 T cell survival and fitness, Immunity 37:1-14, 2012.
  8. Chappell CP, Draves KE, Giltiay NV, Clark EA. Extrafollicular B cell activation by marginal zone dendritic cells drives T cell-dependent antibody responses, J Exp Med 209:1825-1849, 2012.