Flow cytometric quantitation and characterization of the T-lymphocyte memory response to CMV in healthy donors

Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Frequencies of T cells producing cytokines after stimulation by CMV Agweremeasured in hematopoietic stem-cell donors using flow cytometry. In seropositive individuals (n = 75) the mean...

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Published inCytotherapy (Oxford, England) Vol. 4; no. 1; pp. 29 - 40
Main Authors Hensel, N., Melenhorst, J.J., Bradstock, K., Schwarer, A.P., Eniafe, R., Nakamura, R., Barrett, A.J.
Format Journal Article
LanguageEnglish
Published England Elsevier Inc 01.01.2002
Informa UK Ltd
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ISSN1465-3249
1477-2566
DOI10.1080/146532402317251509

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Abstract Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Frequencies of T cells producing cytokines after stimulation by CMV Agweremeasured in hematopoietic stem-cell donors using flow cytometry. In seropositive individuals (n = 75) the mean number of CD81 (CD8bright, CD8dim) and CD4+ cells producing IFN-γ was respectively 3.1% (12.6/μL) and 0.38% (3.2/μL), over 10–fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) in both CD4+ and CD8+ cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD41 cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency. These quantitative studies and the recognition of CD4+ cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.
AbstractList Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Frequencies of T cells producing cytokines after stimulation by CMV Agweremeasured in hematopoietic stem-cell donors using flow cytometry. In seropositive individuals (n = 75) the mean number of CD81 (CD8bright, CD8dim) and CD4+ cells producing IFN-γ was respectively 3.1% (12.6/μL) and 0.38% (3.2/μL), over 10–fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) in both CD4+ and CD8+ cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD41 cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency. These quantitative studies and the recognition of CD4+ cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.
Background Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Methods Frequencies of T cells producing cytokines after stimulation by CMV Ag were measured in hematopoietic stem-cell donors using flow cytometry. Results In seropositive individuals (n = 75) the mean number of CD8 sub(+) (CD8 sub(bright), CD8 sub(dim)) and CD4 sub(+) cells producing IFN-gamma was respectively 3.1% (12.6/muL) and 0.38% (3.2/muL), over 10-fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor-alpha (TNF-alpha) and interferon-gamma (IFN-gamma) in both CD4 sub(+) and CD8 sub(+) cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD4 sub(+) cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency. Discussion These quantitative studies and the recognition of CD4 sub(+) cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.
Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals.BACKGROUNDLevels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals.Frequencies of T cells producing cytokines after stimulation by CMV Ag were measured in hematopoietic stem-cell donors using flow cytometry.METHODSFrequencies of T cells producing cytokines after stimulation by CMV Ag were measured in hematopoietic stem-cell donors using flow cytometry.In seropositive individuals (n = 75) the mean number of CD8(+) (CD8(bright), CD8(dim)) and CD4(+) cells producing IFN-gamma was respectively 3.1% (12.6/microL) and 0.38% (3.2/microL), over 10-fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor-alpha (TNF-alpha) and interferon-gamma (IFN-gamma) in both CD4(+) and CD8(+) cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD4(+) cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency.RESULTSIn seropositive individuals (n = 75) the mean number of CD8(+) (CD8(bright), CD8(dim)) and CD4(+) cells producing IFN-gamma was respectively 3.1% (12.6/microL) and 0.38% (3.2/microL), over 10-fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor-alpha (TNF-alpha) and interferon-gamma (IFN-gamma) in both CD4(+) and CD8(+) cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD4(+) cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency.These quantitative studies and the recognition of CD4(+) cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.DISCUSSIONThese quantitative studies and the recognition of CD4(+) cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.
Background Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Methods Frequencies of T cells producing cytokines after stimulation by CMV Ag were measured in hematopoietic stem-cell donors using flow cytometry. Results In seropositive individuals (n = 75) the mean number of CD8 + (CD8 bright, CD8 dim) and CD4 + cells producing IFN- &#110 was respectively 3.1% (12.6/ &#119 L) and 0.38% (3.2/ &#119 L), over 10-fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor- &#102 (TNF- &#102) and interferon- &#110 (IFN- &#110) in both CD4 + and CD8 + cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD4 + cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency. Discussion These quantitative studies and the recognition of CD4 + cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.
Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Frequencies of T cells producing cytokines after stimulation by CMV Ag were measured in hematopoietic stem-cell donors using flow cytometry. In seropositive individuals (n = 75) the mean number of CD8(+) (CD8(bright), CD8(dim)) and CD4(+) cells producing IFN-gamma was respectively 3.1% (12.6/microL) and 0.38% (3.2/microL), over 10-fold higher than in seronegative subjects (n = 22). CMV stimulation induced tumor necrosis factor-alpha (TNF-alpha) and interferon-gamma (IFN-gamma) in both CD4(+) and CD8(+) cells (usually together), with a shift from memory- to effector-cell phenotype, while only a small proportion of CD4(+) cells produced IL-4. Although the normal range was wide, neither age, sex nor HLA type affected the frequency. These quantitative studies and the recognition of CD4(+) cells as potential effectors of CMV immunity are of relevance for immunotherapeutic approaches to prevent CMV disease after stem-cell transplantation.
Author Schwarer, A.P.
Nakamura, R.
Bradstock, K.
Hensel, N.
Melenhorst, J.J.
Eniafe, R.
Barrett, A.J.
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Issue 1
Keywords Cytomegalovirus
interferon-γ
TNF-α
intracellular cytokine
CMV
lymphocyte
Language English
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Snippet Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Frequencies of T cells producing cytokines...
Background Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals. Methods Frequencies of T cells...
Levels of circulating CMV Ag-specific lymphocytes determine CMV reactivation risk in immunocompromised individuals.BACKGROUNDLevels of circulating CMV...
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SubjectTerms Adoptive Transfer - methods
Antigens, Viral - immunology
CMV
Cytomegalovirus
Cytomegalovirus - immunology
Flow Cytometry - methods
Hematopoietic Stem Cell Transplantation
Humans
Immunologic Memory
Interferon-gamma - biosynthesis
interferon-γ
intracellular cytokine
lymphocyte
T-Lymphocyte Subsets - classification
T-Lymphocyte Subsets - immunology
Tissue Donors
TNF-α
Tumor Necrosis Factor-alpha - biosynthesis
Title Flow cytometric quantitation and characterization of the T-lymphocyte memory response to CMV in healthy donors
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https://dx.doi.org/10.1080/146532402317251509
https://www.ncbi.nlm.nih.gov/pubmed/11953039
https://www.proquest.com/docview/20291466
https://www.proquest.com/docview/71602096
Volume 4
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