The effects of age and cytomegalovirus on markers of inflammation and lymphocyte populations in captive baboons

The human immune system undergoes age-related changes that can lead to increased disease susceptibility. Using the baboon as a model for human immune system aging, we examined age-related changes in relative and absolute numbers of T cell subpopulations, cytomegalovirus (CMV) titer and markers of in...

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Veröffentlicht in:PloS one 2014-09, Vol.9 (9), p.e107167-e107167
Hauptverfasser: Willis, Erin L, Eberle, Richard, Wolf, Roman F, White, Gary L, McFarlane, Dianne
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Eberle, Richard
Wolf, Roman F
White, Gary L
McFarlane, Dianne
description The human immune system undergoes age-related changes that can lead to increased disease susceptibility. Using the baboon as a model for human immune system aging, we examined age-related changes in relative and absolute numbers of T cell subpopulations, cytomegalovirus (CMV) titer and markers of inflammation. In addition, the effect of gender, social status and peer group on lymphocyte subpopulations was determined. Relative and absolute numbers of total lymphocytes (CD3+), T helper cells (CD4+), and cytotoxic T cells (CD8+) increased with age. The proportion of naïve T cells (CD45RA+) decreased, while the total number of cells negative for the co-stimulatory receptor, CD28 (CD28-) increased in an age-dependent manner. Furthermore, CMV titers were negatively correlated with the number of naive CD4+ cells. IL-6 and cortisol concentration were also negatively associated with T cell subpopulations. Additionally, socially dominant baboons exhibited decreases in naïve CD4+ and CD8+ cells (by 65% and 52%, respectively) compared to subordinate animals. These results suggest that factors such as CMV exposure and inflammation may contribute to the age-related decline in immune health and indicate that factors like social status should be considered when studying immunosenescence in animal models.
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Using the baboon as a model for human immune system aging, we examined age-related changes in relative and absolute numbers of T cell subpopulations, cytomegalovirus (CMV) titer and markers of inflammation. In addition, the effect of gender, social status and peer group on lymphocyte subpopulations was determined. Relative and absolute numbers of total lymphocytes (CD3+), T helper cells (CD4+), and cytotoxic T cells (CD8+) increased with age. The proportion of naïve T cells (CD45RA+) decreased, while the total number of cells negative for the co-stimulatory receptor, CD28 (CD28-) increased in an age-dependent manner. Furthermore, CMV titers were negatively correlated with the number of naive CD4+ cells. IL-6 and cortisol concentration were also negatively associated with T cell subpopulations. Additionally, socially dominant baboons exhibited decreases in naïve CD4+ and CD8+ cells (by 65% and 52%, respectively) compared to subordinate animals. 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Willis, Erin L</au><au>Eberle, Richard</au><au>Wolf, Roman F</au><au>White, Gary L</au><au>McFarlane, Dianne</au><au>Dowd, Jennifer Beam</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effects of age and cytomegalovirus on markers of inflammation and lymphocyte populations in captive baboons</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2014-09-22</date><risdate>2014</risdate><volume>9</volume><issue>9</issue><spage>e107167</spage><epage>e107167</epage><pages>e107167-e107167</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>The human immune system undergoes age-related changes that can lead to increased disease susceptibility. Using the baboon as a model for human immune system aging, we examined age-related changes in relative and absolute numbers of T cell subpopulations, cytomegalovirus (CMV) titer and markers of inflammation. In addition, the effect of gender, social status and peer group on lymphocyte subpopulations was determined. Relative and absolute numbers of total lymphocytes (CD3+), T helper cells (CD4+), and cytotoxic T cells (CD8+) increased with age. The proportion of naïve T cells (CD45RA+) decreased, while the total number of cells negative for the co-stimulatory receptor, CD28 (CD28-) increased in an age-dependent manner. Furthermore, CMV titers were negatively correlated with the number of naive CD4+ cells. IL-6 and cortisol concentration were also negatively associated with T cell subpopulations. Additionally, socially dominant baboons exhibited decreases in naïve CD4+ and CD8+ cells (by 65% and 52%, respectively) compared to subordinate animals. These results suggest that factors such as CMV exposure and inflammation may contribute to the age-related decline in immune health and indicate that factors like social status should be considered when studying immunosenescence in animal models.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>25244034</pmid><doi>10.1371/journal.pone.0107167</doi><oa>free_for_read</oa></addata></record>
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subjects Age
Age Factors
Aging
Aging - blood
Aging - immunology
Aging - pathology
Analysis
Animal models
Animals
Antigens
Atherosclerosis
B cells
Baboons
Biology and Life Sciences
Biomarkers - blood
CD28 antigen
CD3 antigen
CD4 antigen
CD4-Positive T-Lymphocytes - immunology
CD4-Positive T-Lymphocytes - pathology
CD45RA antigen
CD8 antigen
CD8-Positive T-Lymphocytes - immunology
CD8-Positive T-Lymphocytes - pathology
Cortisol
Cytokines
Cytomegalovirus
Cytomegalovirus Infections - blood
Cytomegalovirus Infections - immunology
Cytomegalovirus Infections - pathology
Cytotoxicity
Glucocorticoids
Health sciences
Helper cells
Hydrocortisone - blood
Immune system
Immune System - immunology
Immune System - pathology
Immunosenescence
Infections
Inflammation
Inflammation - blood
Inflammation - immunology
Inflammation - pathology
Interleukin 6
Interleukin-6 - blood
Lymphocytes
Lymphocytes T
Markers
Older people
Papio
Physiology
Research and Analysis Methods
Social aspects
Social interactions
Subpopulations
T cells
T-Lymphocyte Subsets - immunology
T-Lymphocyte Subsets - pathology
Viral infections
title The effects of age and cytomegalovirus on markers of inflammation and lymphocyte populations in captive baboons
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