Authors

    Language

    English

    Publication Date

    1-1-2024

    Journal

    The Journal of Cardiovascular Aging

    DOI

    10.20517/jca.2023.38

    PMID

    38455510

    PMCID

    PMC10919906

    PubMedCentral® Posted Date

    3-7-2024

    PubMedCentral® Full Text Version

    Author MSS

    Abstract

    Obesity is associated with chronic inflammation in adipose tissue (AT), mainly evidenced by infiltration and phenotypic changes of various types of immune cells. Macrophages are the major innate immune cells and represent the predominant immune cell population within AT. Lymphocytes, including T cells and B cells, are adaptive immune cells and constitute another important immune cell population in AT. In obesity, CD8+ effector memory T cells, CD4+ Th1 cells, and B2 cells are increased in AT and promote AT inflammation, while regulatory T cells and Th2 cells, which usually function as immune regulatory or type 2 inflammatory cells, are reduced in AT. Immune cells may regulate the metabolism of adipocytes and other cells through various mechanisms, contributing to the development of metabolic diseases, including insulin resistance and type 2 diabetes. Efforts targeting immune cells and inflammation to prevent and treat obesity-linked metabolic disease have been explored, but have not yielded significant success in clinical studies. This review provides a concise overview of the changes in lymphocyte populations within AT and their potential role in AT inflammation and the regulation of metabolic functions in the context of obesity.

    Keywords

    Obesity, adipose tissue, insulin resistance, T cells, B cells

    Published Open-Access

    yes

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    Graphical Abstract

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