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Mouse Bone Marrow Cell Isolation and Macrophage Differentiation

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Non-Alcoholic Steatohepatitis

Abstract

The rapid increase in the incidence of obesity contributes to a parallel increase in nonalcoholic steatohepatitis (NASH). Monocyte-derived macrophages, recruited from the bone marrow to the liver, promote NASH-related inflammation and fibrosis. In addition, adipose tissue macrophages (ATMs) release pro-inflammatory cytokines (PICs) which stimulate adipose tissue lipolysis liberating free fatty acids (FFAs) that can accumulate in the liver as triglycerides (TGs), thereby inducing steatosis. As such, bone marrow-derived macrophages (BMDMs) function as an essential tool to study the pathogenesis of NASH. BMDMs are primary bone marrow-derived cells which are differentiated into macrophages in vitro in the presence of growth factors. Macrophage colony-stimulating factor (M-CSF) is required for the proliferation and differentiation of committed myeloid progenitors into cells of the macrophage/monocyte lineage. Here, we describe a protocol for the isolation of mouse bone marrow cells and subsequent macrophage differentiation in which bone marrow cells are cultured in the presence of M-CSF, supplemented either by conditioned medium from L929 cells or in purified form. The efficiency of the differentiation is confirmed by immunofluorescent staining of macrophage surface antigen F4/80. The BMDMs serve as an excellent ex vivo model for a variety of studies, including hepatocyte-macrophage and adipocyte-macrophage cross-talk regulating NASH.

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Acknowledgments

This work was supported in part by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) under Grant 1R01DK107451-01A1, the National Cancer Institute (NCI) under Grants 1R01CA230561-01A1, 1R01CA240004-01, and 1R01CA244993-01, and the Department of Defense (DOD) under Grant CA170048.

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Correspondence to Devanand Sarkar .

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© 2022 The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature

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Mendoza, R., Banerjee, I., Manna, D., Reghupaty, S.C., Yetirajam, R., Sarkar, D. (2022). Mouse Bone Marrow Cell Isolation and Macrophage Differentiation. In: Sarkar, D. (eds) Non-Alcoholic Steatohepatitis. Methods in Molecular Biology, vol 2455. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2128-8_8

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  • DOI: https://doi.org/10.1007/978-1-0716-2128-8_8

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  • Publisher Name: Humana, New York, NY

  • Print ISBN: 978-1-0716-2127-1

  • Online ISBN: 978-1-0716-2128-8

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