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Deleting an Nr4a1 Super-Enhancer Subdomain Ablates Ly6C Monocytes while Preserving Macrophage Gene Function. | LitMetric

AI Article Synopsis

Article Abstract

Mononuclear phagocytes are a heterogeneous family that occupy all tissues and assume numerous roles to support tissue function and systemic homeostasis. Our ability to dissect the roles of individual subsets is limited by a lack of technologies that ablate gene function within specific mononuclear phagocyte sub-populations. Using Nr4a1-dependent Ly6C monocytes, we present a proof-of-principle approach that addresses these limitations. Combining ChIP-seq and molecular approaches we identified a single, conserved, sub-domain within the Nr4a1 enhancer that was essential for Ly6C monocyte development. Mice lacking this enhancer lacked Ly6C monocytes but retained Nr4a1 gene expression in macrophages during steady state and in response to LPS. Because Nr4a1 regulates inflammatory gene expression and differentiation of Ly6C monocytes, decoupling these processes allows Ly6C monocytes to be studied independently.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5694686PMC
http://dx.doi.org/10.1016/j.immuni.2016.10.011DOI Listing

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