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2017 ; 18
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): ä Nephropedia Template TP
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Metallothioneins: Emerging Modulators in Immunity and Infection
#MMPMID29065550
Subramanian Vignesh K
; Deepe GS Jr
Int J Mol Sci
2017[Oct]; 18
(10
): ä PMID29065550
show ga
Metallothioneins (MTs) are a family of metal-binding proteins virtually expressed
in all organisms including prokaryotes, lower eukaryotes, invertebrates and
mammals. These proteins regulate homeostasis of zinc (Zn) and copper (Cu),
mitigate heavy metal poisoning, and alleviate superoxide stress. In recent years,
MTs have emerged as an important, yet largely underappreciated, component of the
immune system. Innate and adaptive immune cells regulate MTs in response to
stress stimuli, cytokine signals and microbial challenge. Modulation of MTs in
these cells in turn regulates metal ion release, transport and distribution,
cellular redox status, enzyme function and cell signaling. While it is well
established that the host strictly regulates availability of metal ions during
microbial pathogenesis, we are only recently beginning to unravel the interplay
between metal-regulatory pathways and immunological defenses. In this
perspective, investigation of mechanisms that leverage the potential of MTs to
orchestrate inflammatory responses and antimicrobial defenses has gained
momentum. The purpose of this review, therefore, is to illumine the role of MTs
in immune regulation. We discuss the mechanisms of MT induction and signaling in
immune cells and explore the therapeutic potential of the MT-Zn axis in
bolstering immune defenses against pathogens.