| |
|
|
|
|
|
|
|||
|
Blood, 1 January 2006, Vol. 107, No. 1, pp. 389-396. Prepublished online as a Blood First Edition Paper on September 20, 2005; DOI 10.1182/blood-2005-07-2746.
TRANSPLANTATION Pretransplantation CMV-specific T cells protect recipients of T-cell-depleted grafts against CMV-related complicationsFrom the Division of Hematology, the Division of Immunology and Allergology, and the Central Laboratory of Virology, Division of Infectious Diseases, Department of Internal Medicine, University Hospital Geneva, Switzerland; the Institute for Cell Biology, Department of Immunology, Eberhard Karls University, Tübingen, Germany; the Department of Hematology, Leiden University Medical Center (LUMC), The Netherlands; and the Laboratory of Experimental Immunology, Academic Medical Center, Amsterdam, The Netherlands.
We have studied cytomegalovirus (CMV) immunity in 17 CMV-positive recipients of T-cell-depleted or T-cell-replete grafts. In recipients of T-cell-replete grafts, the patient's CMV-specific T-cell response was completely ablated. Because primary anti-CMV responses were rare during the first year, immunity depended essentially on the transfer of donor CMV-specific T cells and, therefore, on the CMV positivity of the donor. In the recipients of T-cell-depleted grafts, CMV-specific cytotoxic T cells were of recipient origin in 2 patients who underwent transplantation with CMV-negative donors and in 3 of 8 patients who underwent transplantation with CMV-positive donors, and they were of mixed or donor origin in the other 5 patients studied. Recipient CMV-specific T cells responded vigorously to antigen ex vivo and persisted for several years without replenishment by donor cells. Furthermore, they appeared to have a protective effect because CMV-related complications were absent in the patients with CMV-specific T cells of recipient origin. Clinical outcomes of a cohort of 91 patients corroborated the experimental results. Patients with recipient T cells in their blood were protected regardless of the donor immune status. Hence, when a T-cell depletion protocol is used that favors the survival of recipient T cells, the patient's pretransplantation CMV-specific immunity protects against posttransplantation CMV-related complications.
This article has been cited by other articles:
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Copyright © 2006 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||