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Sex and the single transplanted kidney
Sanjeev Noel, … , Abdel Rahim A. Hamad, Hamid Rabb
Sanjeev Noel, … , Abdel Rahim A. Hamad, Hamid Rabb
Published April 18, 2016
Citation Information: J Clin Invest. 2016;126(5):1643-1645. https://doi.org/10.1172/JCI87428.
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Sex and the single transplanted kidney

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Abstract

Substantial ischemia-reperfusion injury (IRI) to the transplanted kidney occurs in 30% to 50% of transplantation patients who receive the organ from a deceased donor. IRI usually manifests as delayed graft function (DGF) and, in severe cases, results in primary nonfunction. Previous studies, primarily experimental, have demonstrated sex-specific susceptibility to IRI in kidney and other organs. In this issue of the JCI, Aufhauser Jr., Wang, and colleagues further demonstrate the importance of donor and recipient sex in IRI and elucidate the role of estrogen receptors in a murine model. Furthermore, analysis of data from 46,691 renal transplant patients in the United Network for Organ Sharing (UNOS) database revealed that sex affects DGF outcomes in humans. Manipulation of sex-driven molecular pathways offers a fertile opportunity to increase the number of organs available for transplantation and to reduce IRI in kidney and, likely, other organs.

Authors

Sanjeev Noel, Niraj M. Desai, Abdel Rahim A. Hamad, Hamid Rabb

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Figure 1

Sex affects the susceptibility and pathogenesis of IRI in a single transplanted kidney.

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Sex affects the susceptibility and pathogenesis of IRI in a single trans...
Exposure of a kidney transplant to warm and/or cold IR results in the activation of multiple pathological processes, including uncontrolled ROS production, activation of immune cells, proinflammatory cytokine production, endothelial and epithelial disintegration, and mitochondrial dysregulation. These effects result in acute loss of kidney function that often resolves following a complete and normal repair. Alternatively, persistent inflammation and further injury, along with defective and inefficient repair processes, can lead to tubular atrophy and fibrosis, which subsequently result in the loss of graft function. In this issue, Aufhauser Jr., Wang, and colleagues demonstrate that sex and estrogen mediate the response from the normal kidney to the IRI kidney. It remains unknown whether these factors affect recovery back toward normal kidney function or the development of atrophic and fibrosed kidney. In addition to estrogen, other factors, such as testosterone, kidney size, recipient size, and sex-specific differences in glomerular filtration rates, could also modulate recovery following IRI. It is not understood how these sex-specific factors interact with other identified pathophysiological mechanisms to determine DGF outcomes. Adapted with permission from Nature Reviews Nephrology (5). DAMPs, damage-associated molecular patterns; TLR, Toll-like receptor.

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ISSN: 0021-9738 (print), 1558-8238 (online)

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