Abstract
Adipose tissue is composed by adipocytes and stromal-vascular cells that include a wide variety of immune cells. The proportion of these cells in the tissue, their intrinsic characteristics, their degree of differentiation and activation, as well as their crosstalk determine the function of the fat depot and how it impacts the risk of metabolic diseases. While white adipocytes have the capacity to accumulate triglycerides and serve as a reservoir of energy for the organism, brown adipocytes have the potential to use large amounts of substrates like glucose and lipids to fuel uncoupled respiration and generate heat. Conversion of white fat into brown-like fat occurs mainly in subcutaneous adipose depots where beige adipocytes are recruited in response to cold, exercise, caloric restriction and other stimuli. This process is called browning. Immune cells and their secreted molecules have been shown to control the thermogenic capacity of brown adipose tissue and elicit white to beige adipocyte conversion in the white adipose tissue. In this chapter we discuss the studies that have described the association between immune cells, immune mediators and the induction of a thermogenic phenotype in adipose tissue.
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Acknowledgements
A.L.R., L.O.L., and M.A.M. are funded by Fundação de Amparo à Pesquisa do Estado de São Paulo (2017/01184-9, 2017/07975-8, 2016/12294-7 and 2017/08264-8). T.J.S. is supported by the German Research Foundation (DFG; SCHU 2445/5-1 and SCHU 2445/6-2), the German Ministry of Education and Research (BMBF) and the State of Brandenburg (DZD grant # 82DZD00302 and FKZ 82DZD0038G).
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Rocha, A.L., Leiria, L.O., Schulz, T.J., Mori, M.A. (2022). Immune Regulation of Adipose Tissue Browning. In: Camara, N.O.S., Alves-Filho, J.C., Moraes-Vieira, P.M.M.d., Andrade-Oliveira, V. (eds) Essential Aspects of Immunometabolism in Health and Disease. Springer, Cham. https://doi.org/10.1007/978-3-030-86684-6_11
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