Journal
IMMUNOLOGY
Volume 162, Issue 3, Pages 268-280Publisher
WILEY
DOI: 10.1111/imm.13291
Keywords
autoimmunity; cancer; inflammation; mitochondria; NLRX1; NOD‐ like receptors; SARS‐ CoV‐ 2
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NLRX1, a member of the NOD-like receptor family, stands out with unique features within its family, playing a key role in regulating inflammatory signaling and maintaining homeostasis between mitochondrial biology and immune response. Its involvement in a wide range of diseases, including cancer and autoimmune conditions, is raising interest in therapeutically targeting NLRX1.
NLRX1 is a member of the NOD-like receptor family, a set of pattern recognition receptors associated with innate immunity. Interestingly, NLRX1 exists in somewhat of an exile from its NLR counterparts with unique features that mediate atypical functions compared with traditional NOD-like receptors (NLRs). Aside from a mitochondrial targeting sequence, the N-terminal region is yet to be characterized. Mitochondrially located, NLRX1 sits within a subgroup of regulatory NLRs responsible for negatively regulating cellular inflammatory signalling. As well as modulating pathogen response, emerging evidence is implicating NLRX1 as a central homeostatic gatekeeper between mitochondrial biology and immunological response. More recently, NLRX1 has been implicated in a wide range of disease, both pathogen-driven and otherwise. Emerging links of NLRX1 in cancer biology, autoimmunity and other inflammatory conditions are raising the potential of targeting NLRX1 therapeutically, with recent studies in inflammatory bowel disease showing great promise. Within this review, we address the unique features of NLRX1, its roles in innate immune signalling and its involvement in a range of inflammatory, metabolic and oncology disease indications with a focus on areas that could benefit from therapeutic targeting of NLRX1.
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