The Role of Retinoid X Receptor Signaling in Multi-organ Ischemia/Reperfusion Injury: A Comprehensive Review

Ischemia-Reperfusion (I/R) injury is a result of restoration of blood flow after a period of ischemia, which results in more tissue damage due to oxidative stress, inflammation, mitochondrial dysfunction, and Ca2+ overload. Various organs like the heart, brain, liver, and kidneys are highly sensitive to I/R injury, which results in apoptosis, necroptosis, and ferroptosis.

The literature review on "Retinoid X Receptors Signaling in Multiple-Organ Ischemia/ Reperfusion Injury" was conducted using strategic search terms including cerebral, hepatic, I/R injury, myocardial, renal, and Retinoid X Receptors (RXRs). Peer-reviewed sources like PubMed, ScienceDirect, and Google Scholar were used, and only recent studies that were peer-reviewed and published in English were found in order to maintain consistency, reliability, and scientific rigor.

Recent studies proved that RXRs have a critical role in the regulation of genes responsible for ROS production, inflammation, and cell survival. Activation of RXRs showed protection in preclinical models of myocardial, cerebral, hepatic, and renal I/R injury.

Mechanisms mediated by RXR in various I/R injuries are by inhibition of the TGF-β/Smad signaling pathway, inhibition of neuroinflammation and ferroptosis, and the downregulation of NF-κB and NLRP3 activation. In addition, renal repair and the reduction of oxidative stress are also facilitated by the RXRs, underscoring their multifaceted protective roles.

RXRs have great potential as therapeutic targets for I/R injury. Further study of the role of RXR signaling may lead to new therapeutic approaches and biomarkers that will enhance the outcome of I/R injury.