Kidney International

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Post-transplant recurrence of focal segmental glomerular sclerosis (FSGS) is a major challenge in the field of kidney transplantation. Currently, the most reliable predictor of FSGS recurrence is disease recurrence in a previous allograft. Recent studies suggest a possible causal role of anti-nephrin autoantibodies in the primary disease (primary FSGS and minimal change disease), as well as post-transplant recurrence of FSGS. In this issue of Kidney International, Batal et al. evaluate pretransplant anti-nephrin autoantibodies as a specific predictor of FSGS recurrence and demonstrate colocalization of nephrin and punctate IgG in anti-nephrin-positive patients with disease recurrence...

Patient navigator programs may improve outcomes among individuals with chronic kidney disease by reducing barriers to evidence-based care. The NAVKIDS2 trial evaluated a patient navigation program among 162 children with chronic kidney disease from marginalized populations. The intervention was not associated with quantitative changes in self-reported health, but qualitative data indicated substantial benefit in alleviating caregiver strain and facilitating care coordination. Future studies should identify quantitative measures that capture the benefits experienced by patients in care coordination, empowerment, and self-management...

The changes in renal function over time as surrogate endpoints for new drug trials are complicated by many factors, including the often-expected initial decrease in estimated glomerular filtration rate when a new drug is started. Two articles in the journal address this challenge, but multiple other challenges are explored in this commentary. To maximize the benefits of expensive new drugs that may slow decline in renal function, these drugs should be reserved for those patients who have a high probability of rapid loss of kidney function...

Plasma or urinary clearance of exogenous filtration markers is required for assessment of measured glomerular filtration rate. Although multiple methods are available, none is widely used because of their complexity, each has measurement error, and standardization is limited. Recently, a study validated the plasma clearance of a new exogenous filtration marker, relmapirazin, which can be detected by its transdermal fluorescence, potentially simplifying the procedure and increasing access to measured glomerular filtration rate...

Acute kidney injury is a devasting clinical syndrome resulting from multiple causes, characterized by an abrupt deterioration of kidney function for which there is no pharmacologic treatment. Cilastatin has demonstrated direct nephroprotective effects in acute kidney injury and now is shown to be effective to specifically target therapeutically loaded nanoparticles to the proximal tubule to treat acute kidney injury.

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International consensus supports the development of standardized protocols for measured glomerular filtration rate (mGFR) to facilitate the integration of mGFR testing in both clinical and research settings. To this end, the European Kidney Function Consortium convened an international group of experts with relevant experience in mGFR. The working group performed an extensive literature search to inform the development of recommendations for mGFR determination using 1-compartment plasma clearance models and iohexol as the exogenous filtration marker...

Current kidney perfusion protocols are not optimized for addressing the ex vivo physiological and metabolic needs of the kidney. Ex vivo normothermic perfusion may be utilized to distinguish high-risk kidneys to determine suitability for transplantation. Here, we assessed the association of tissue metabolic changes with changes in a kidney injury biomarker and functional parameters in eight deceased donor kidneys deemed unsuitable for transplantation during a 12-hour ex vivo normothermic perfusion...

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