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Age-related changes in expression and signaling of TAM receptor inflammatory regulators in monocytes.


ABSTRACT: The multifactorial immune deterioration in aging--termed "inflamm-aging"--is comprised of a state of low-grade, chronic inflammation and complex dysregulation of responses to immune stimulation. The TAM family (Tyro 3, Axl, and Mer) of receptor tyrosine kinases are negative regulators of Toll like receptor-mediated immune responses that broadly inhibit cytokine receptor cascades to inhibit inflammation. Here we demonstrate elevated expression of TAM receptors in monocytes of older adults, and an age-dependent difference in signaling mediator AKT resulting in dysregulated responses to signaling though Mer. Our results may be especially significant in tissue, where levels of Mer are highest, and may present avenues for modulation of chronic tissue inflammation noted in aging.

SUBMITTER: Wang X 

PROVIDER: S-EPMC5839385 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Age-related changes in expression and signaling of TAM receptor inflammatory regulators in monocytes.

Wang Xiaomei X   Malawista Anna A   Qian Feng F   Ramsey Christine C   Allore Heather G HG   Montgomery Ruth R RR  

Oncotarget 20180103 11


The multifactorial immune deterioration in aging--termed "inflamm-aging"--is comprised of a state of low-grade, chronic inflammation and complex dysregulation of responses to immune stimulation. The TAM family (Tyro 3, Axl, and Mer) of receptor tyrosine kinases are negative regulators of Toll like receptor-mediated immune responses that broadly inhibit cytokine receptor cascades to inhibit inflammation. Here we demonstrate elevated expression of TAM receptors in monocytes of older adults, and an  ...[more]

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