Dr. Emmanuel Zorn

Dr. Zorn’s laboratory investigates host-graft interactions following solid organ transplantation in humans with a primary focus on B cells and antibodies in mechanisms of rejection of heart and kidney transplants. Specific avenues of research:

Role of B cells infiltrating heart transplants during cardiac allografts vasculopathy

B cell infiltrates are often observed in solid organ grafts during chronic and acute rejection, yet their function is still unclear. Our studies use cardiac allografts explanted because of rejection to isolate infiltrating B cells and determine their contribution to the rejection mechanism.

Mechanisms of chronic antibody mediated rejection of kidney allografts

Chronic humoral rejection (CHR) is one of the leading causes of late graft loss. The etiology of CHR is currently unknown. Our multicenter study uses samples collected from kidney transplant recipients at our institution as well as at collaborating centers in the USA and Europe to identify immune markers associated with CHR and piece together the causal chain leading to this complication.

Role of Natural Antibodies in host responses to solid organ grafts

Natural antibodies are broadly reactive serum immunoglobulins implicated in apoptotic cell clearance. Their contribution to inflammatory reactions associated with graft tissue destruction has not been examined. In our studies we investigate the function of these natural antibodies in acute and chronic rejection as well as in mechanisms of ischemia reperfusion injury.

Lab Members:

Sarah See, PhD
Debanjana Chatterjee, PhD
Yiming Gu, MD
Sarah Nunez
Yokarla Veras

 

Recent publications:

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1.       Porcheray, F., Wong, W., Saidman, S.L., DeVito, J., Girouard, T.C., Chittenden, M., Shaffer, J., Tolkoff-Rubin, N., Bimalangshu, D.R., Spitzer, T.R., Colvin, R.B., Cosimi, A.B., Kawai, T., Sachs, D.H., Sykes, M., and Zorn, E. B cell immunity in the context of T cell tolerance after combined kidney and bone marrow transplantation in humans. American J. Transplant, 2009; 9:2126-35. PMCID: PMC2837587

2.       Wong, W., Lee, R.A., Saidman, S.L., Smith, R.N. and Zorn, E. Bortezomib in kidney transplant recipients with antibody mediated rejection: three case reports. Clin Transpl, 2009: 401-5. PMID: 20524305.

3.       Porcheray, F., DeVito, J., Yeap, B.Y., Xue, L., Dargon, I., Paine, R., Girouard, T.C., Saidman, S.L., Colvin, R.B., Wong, W. and Zorn, E. Chronic humoral rejection of human kidney allografts associates with broad autoantibody responses. Transplantation, 2010; 89:1239-46. PMCID: PMC3744373

4.       Wong, W., DeVito, J., Nguyen, H., Sarracino, D., Porcheray, F., Dargon, I., Pelle, P.D., Collins, A.B., Tolkoff-Rubin, N., Smith, R.N., Colvin, R.B. and Zorn, E. Chronic humoral rejection of human kidney allografts is associated with MMP-2 accumulation in podocytes and its release in the urine. American J. Transplant, 2010; 10:2463-71. PMCID: PMC3805271.

5.       Porcheray, F., Miklos, D., Floyd, B.H., Sarantopoulos, S., Bellucci, R., Soiffer, R.J., Antin, J.H., Alyea, E.P., Ritz, J. and Zorn, E. Combined CD4 T cell and antibody response to human histocompatibility antigen DBY after allogeneic stem cell transplantation. Transplantation, 2011; 92: 359-65. PMCID: PMC3263512

6.       Porcheray, F., DeVito, J., Helou, Y., Dargon, I., Fraser, J.W., Nobecourt, P., Ferdman, J., Germana, S., Girouard, T.C., Kawai, T., Saidman, S.L., Wong, W., Colvin, R.B., Leguern, C., and Zorn, E.Expansion of polyreactive B cells cross-reactive to HLA and self in the blood of a patient with kidney graft rejection. American J. Transplant, 2012; 12:2088-97. PMCID: PMC3402627.

7.       Porcheray, F, Fraser JW, Gao B, McColl A, DeVito J, Dargon I, Helu Y, Wong W, Girouard TC, Saidman SL, Colvin RB, Palmisano A, Maggiore U, Vaglio A, Smith RN and Zorn E. Polyreactive Antibodies Developing Amidst Humoral Rejection of Human Kidney Grafts Bind Apoptotic Cells and Activate Complement. American J. Transplant. 2013. 10: 2590-600. PMCID: PMC3864117.

8.       Mengel M., Chong A., Rothstein D.M., Zorn E. and Maltzman J.S. AST Cutting Edge of Transplantation 2013 Meeting report: A comprehensive look at B cells and antibodies in transplantation. American J. Transplant. 2014. 3: 524-530. PMCID: PMC4046165

9.       Kawai T., Sachs D.H., Sprangers B., Sptizer T.R., Saidman S.L., Zorn E., Tolkoff-Rubin N., Preffer F., Crisalli K., Gao B., Wong W., Morri H., LoCscio S.A., Sayer P., Shonts B., Williams W.W., Smith R.N., Colvin R.B., Sykes M. and Cosimi A.B. Term Results in Recipients of Combined HLA mismatched Kidney and Bone Marrow Transplantation Without Maintenance Immunosuppression. American J. Transplant. 2014; 14: 1599-611. PMCID in process.

10.   Ferdman J., Porcheray F., Gao B., Moore C., DeVito J., Dougherty S., Thomas M.V., Farkash., Elias N., Kawai T., Malek S.K., Tullius S.G., Wong W. and Zorn E. Expansion and somatic hypermutation of B cell clones in rejected human kidney grafts. Transplantation. 2014; In press. PMCID in process.

11.    Gao B., Moore C, Porcheray F., Rong C., Abidoglu A., DeVito J., Paine R., Girouard T.C., Saidman S.L., Schoenfeld D., Levin B., Wong W., Elias N., Schuetz C., Rosales I.A., Fu Y and Zorn E. Pre-Transplant IgG Reactivity to Apoptotic Cells Correlates with Late kidney Allograft Loss. American J. Transplant. 2014; 14: 1581-91. PMCID: PMC4120834.