Impaired dendritic cell immunophenotype and function in heart transplant patients undergoing active cytomegalovirus infection

Human cytomegalovirus (HCMV) infects dendritic cells (DCs) in vitro and inhibits their maturation properties and their ability to stimulate T-cell proliferation and cytotoxicity. This study analyzed HCMV infection of DCs in vivo. We compared blood DCs and monocyte-derived DCs from heart-transplant p...

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Veröffentlicht in:Transplantation 2005-01, Vol.79 (2), p.219-227
Hauptverfasser: VARANI, Stefania, FRASCAROLI, Giada, GIBELLINI, Davide, POTENA, Luciano, LAZZAROTTO, Tiziana, LEMOLI, Roberto M, MAGELLI, Carlo, SÖDERBERG-NAUCLER, Cecilia, LANDINI, Maria P
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container_end_page 227
container_issue 2
container_start_page 219
container_title Transplantation
container_volume 79
creator VARANI, Stefania
FRASCAROLI, Giada
GIBELLINI, Davide
POTENA, Luciano
LAZZAROTTO, Tiziana
LEMOLI, Roberto M
MAGELLI, Carlo
SÖDERBERG-NAUCLER, Cecilia
LANDINI, Maria P
description Human cytomegalovirus (HCMV) infects dendritic cells (DCs) in vitro and inhibits their maturation properties and their ability to stimulate T-cell proliferation and cytotoxicity. This study analyzed HCMV infection of DCs in vivo. We compared blood DCs and monocyte-derived DCs from heart-transplant patients undergoing an acute HCMV infection with DCs obtained from HCMV-negative transplant patients. Diagnosis of active HCMV infection was established by antigenemia test. We detected viral RNA and antigens in defined DC subsets obtained from patients undergoing an active HCMV infection. In addition, we found an impaired immunophenotype in immature DCs from HCMV-positive subjects and a reduced ability of mature DCs from the same group of patients to stimulate allogenic T-cell proliferation. The impaired immunophenotype and function detected in DCs from transplant patients undergoing an active HCMV infection may be a mechanism used by the virus to interfere with early immune functions and thereby contributing to the HCMV-induced immunosuppression in these patients.
doi_str_mv 10.1097/01.TP.0000147359.63158.29
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This study analyzed HCMV infection of DCs in vivo. We compared blood DCs and monocyte-derived DCs from heart-transplant patients undergoing an acute HCMV infection with DCs obtained from HCMV-negative transplant patients. Diagnosis of active HCMV infection was established by antigenemia test. We detected viral RNA and antigens in defined DC subsets obtained from patients undergoing an active HCMV infection. In addition, we found an impaired immunophenotype in immature DCs from HCMV-positive subjects and a reduced ability of mature DCs from the same group of patients to stimulate allogenic T-cell proliferation. 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Psychology ; Fundamental immunology ; Graft Rejection - epidemiology ; Heart Transplantation - immunology ; Human cytomegalovirus ; Humans ; Immunophenotyping - methods ; Medical sciences ; Medicin och hälsovetenskap ; Middle Aged ; Monocytes - immunology ; Monocytes - virology ; Postoperative Complications - immunology ; Reverse Transcriptase Polymerase Chain Reaction ; RNA, Viral - blood ; RNA, Viral - isolation &amp; purification ; Surgery (general aspects). Transplantations, organ and tissue grafts. 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Psychology</subject><subject>Fundamental immunology</subject><subject>Graft Rejection - epidemiology</subject><subject>Heart Transplantation - immunology</subject><subject>Human cytomegalovirus</subject><subject>Humans</subject><subject>Immunophenotyping - methods</subject><subject>Medical sciences</subject><subject>Medicin och hälsovetenskap</subject><subject>Middle Aged</subject><subject>Monocytes - immunology</subject><subject>Monocytes - virology</subject><subject>Postoperative Complications - immunology</subject><subject>Reverse Transcriptase Polymerase Chain Reaction</subject><subject>RNA, Viral - blood</subject><subject>RNA, Viral - isolation &amp; purification</subject><subject>Surgery (general aspects). Transplantations, organ and tissue grafts. 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Psychology</topic><topic>Fundamental immunology</topic><topic>Graft Rejection - epidemiology</topic><topic>Heart Transplantation - immunology</topic><topic>Human cytomegalovirus</topic><topic>Humans</topic><topic>Immunophenotyping - methods</topic><topic>Medical sciences</topic><topic>Medicin och hälsovetenskap</topic><topic>Middle Aged</topic><topic>Monocytes - immunology</topic><topic>Monocytes - virology</topic><topic>Postoperative Complications - immunology</topic><topic>Reverse Transcriptase Polymerase Chain Reaction</topic><topic>RNA, Viral - blood</topic><topic>RNA, Viral - isolation &amp; purification</topic><topic>Surgery (general aspects). Transplantations, organ and tissue grafts. 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This study analyzed HCMV infection of DCs in vivo. We compared blood DCs and monocyte-derived DCs from heart-transplant patients undergoing an acute HCMV infection with DCs obtained from HCMV-negative transplant patients. Diagnosis of active HCMV infection was established by antigenemia test. We detected viral RNA and antigens in defined DC subsets obtained from patients undergoing an active HCMV infection. In addition, we found an impaired immunophenotype in immature DCs from HCMV-positive subjects and a reduced ability of mature DCs from the same group of patients to stimulate allogenic T-cell proliferation. 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subjects Antigens, CD - blood
Antigens, Viral - isolation & purification
Biological and medical sciences
Cell Culture Techniques
Cytomegalovirus Infections - immunology
Dendritic Cells - immunology
Fundamental and applied biological sciences. Psychology
Fundamental immunology
Graft Rejection - epidemiology
Heart Transplantation - immunology
Human cytomegalovirus
Humans
Immunophenotyping - methods
Medical sciences
Medicin och hälsovetenskap
Middle Aged
Monocytes - immunology
Monocytes - virology
Postoperative Complications - immunology
Reverse Transcriptase Polymerase Chain Reaction
RNA, Viral - blood
RNA, Viral - isolation & purification
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Tissue, organ and graft immunology
title Impaired dendritic cell immunophenotype and function in heart transplant patients undergoing active cytomegalovirus infection
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