CMV-specific T-cell immunity, viral load, and clinical outcome in seropositive renal transplant recipients: a pilot study
2010 (English)In: Clinical Transplantation, ISSN 0902-0063, E-ISSN 1399-0012, Vol. 24, no 3, 401-409 p.Article in journal (Refereed) Published
Cytomegalovirus (CMV) infection is still the leading opportunistic infection following solid organ transplantation. The aim of this prospective study of renal transplant recipients was to evaluate the dynamics of CMV-specific T-cells, viral load, and clinical symptoms of CMV infection.
Levels of tetramer-selected CD8+ T-cells (TetraCD8), CMV-specific interferon-γ producing CD8+ T-cells (IFNγCD8), and CD4+ T-cells (IFNγCD4), measured using major histocompatibility complex-tetramer and cytokine flow cytometry techniques, and CMV DNA were monitored monthly in 17 CMV-seropositive patients up to one yr (median 12 months, range 3–12) after transplantation and correlated to clinical outcome.
CMV DNAemia was detected in 94% of the patients, but only one patient developed CMV disease. CMV DNAemia >1 million copies/mL was seen in asymptomatic patients. CMV-specific T-cells decreased rapidly after transplantation. TetraCD8 and IFNγCD8 regenerated within three months, whereas IFNγCD4 recovery was impaired up to one yr after transplantation. The proportion of IFNγCD4 at two months post-transplantation as compared with baseline, correlated strongly with the magnitude of the CMV DNAemia.
Monitoring the reduction of IFNγCD4 compared with baseline during the first months after transplantation could be considered in predicting risk for high-grade CMV DNAemia and in deciding strategic approaches for pre-emptive and prophylactic therapy.
Place, publisher, year, edition, pages
2010. Vol. 24, no 3, 401-409 p.
CMV, CMV DNAemia, CMV-specific immunity, Renal transplantation, Tetramer
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-97643DOI: 10.1111/j.1399-0012.2009.00976.xISI: 000278307500018PubMedID: 19222507OAI: oai:DiVA.org:uu-97643DiVA: diva2:172664