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The Impact of Age, Sex, CMV, and Smoking on Circulating Immune Cells



June 8, 2023

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  • Aging-US published this trending research paper on April 27, 2023, in Volume 15, Issue 10, entitled, “Circulating immune cell phenotypes are associated with age, sex, CMV, and smoking status in the Framingham Heart Study offspring participants" by researchers from Boston University School of Public Health, Department of Biostatistics, Boston, MA; University of Vermont, Larner College of Medicine, Department of Pathology and Laboratory Medicine, Burlington, VT; Boston University Chobanian and Avedisian School of Medicine, Boston University Alzheimer’s Disease Research Center and CTE Center, Boston, MA; Boston University Chobanian and Avedisian School of Medicine, Department of Neurology, Boston, MA; Framingham Heart Study, National Heart, Lung, and Blood Institute and Boston University Chobanian and Avedisian School of Medicine, Framingham, MA; University of Texas Health Science Center at San Antonio, Glenn Biggs Institute for Alzheimer’s and Neurodegenerative Diseases, San Antonio, TX; Boston University Chobanian and Avedisian School of Medicine, Department of Psychiatry, Boston, MA; Boston University Chobanian and Avedisian School of Medicine, Department of Pharmacology and Experimental Therapeutics, Boston, MA; Boston University Chobanian and Avedisian School of Medicine, Department of Medicine, Boston, MA; Boston Medical Center, Department of Adult Primary Care, Boston, MA. DOI - Corresponding authors - Yuan Fang - Abstract Understanding the composition of circulating immune cells with aging and the underlying biologic mechanisms driving aging may provide molecular targets to slow the aging process and reduce age-related disease. Utilizing cryopreserved cells from 996 Framingham Heart Study (FHS) Offspring Cohort participants aged 40 and older (mean 62 years, 48% female), we report on 116 immune cell phenotypes including monocytes, T-, B-, and NK cells and their subtypes, across age groups, sex, cytomegalovirus (CMV) exposure groups, smoking and other cardiovascular risk factors. The major cellular differences with CMV exposure were higher Granzyme B+ cells, effector cells, and effector-memory re-expressing CD45RA (TEMRA) cells for both CD4+ and CD8+. Older age was associated with lower CD3+ T cells, lower naïve cells and naïve/memory ratios for CD4+ and CD8+. We identified many immune cell differences by sex, with males showing lower naïve cells and higher effector and effector memory cells. Current smokers showed lower pro-inflammatory CD8 cells, higher CD8 regulatory type cells and altered B cell subsets. No significant associations were seen with BMI and other cardiovascular risk factors. Our cross-sectional observations of immune cell phenotypes provide a reference to further the understanding of the complexity of immune cells in blood, an easily accessible tissue. Sign up for free Altmetric alerts about this article - Subscribe for free publication alerts from Aging - Keywords - aging, immune cell, CMV, T cells, smoking About Aging-US Launched in 2009, Aging-US publishes papers of general interest and biological significance in all fields of aging research and age-related diseases, including cancer—and now, with a special focus on COVID-19 vulnerability as an age-dependent syndrome. Topics in Aging-US go beyond traditional gerontology, including, but not limited to, cellular and molecular biology, human age-related diseases, pathology in model organisms, signal transduction pathways (e.g., p53, sirtuins, and PI-3K/AKT/mTOR, among others), and approaches to modulating these signaling pathways. Please visit our website at​​ and connect with us: SoundCloud - Facebook - Twitter - Instagram - YouTube - LinkedIn - Pinterest - Media Contact 18009220957 MEDIA@IMPACTJOURNALS.COM

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