{"title":"Current Options for Kidney Protection: Are Renin-Angiotensin System Inhibitors Still Relevant?","authors":"Waichi Wong","doi":"10.1016/j.semnephrol.2026.151689","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151689","url":null,"abstract":"<p><p>Chronic kidney disease progresses through convergent mechanisms involving hemodynamic stress, proteinuria, inflammation, fibrosis, and metabolic disturbance. Barry Brenner's hyperfiltration hypothesis established these processes as drivers of ongoing injury, and landmark trials established that renin-angiotensin-aldosterone system (RAAS) inhibition slows progression and improves clinical outcomes, marking a shift from supportive care to disease-modifying treatment. Treatment options have since expanded, with newer therapeutic classes providing additional kidney and cardiovascular benefit alongside emerging agents with more targeted mechanisms of action. Approaches to prognostic assessment have also advanced through biomarkers, genetics, imaging, and digital tools, although integration into clinical practice remains incomplete. More than 4 decades after their introduction, RAAS inhibitors remain a core component of kidney protection, with newer therapies complementing rather than replacing them.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151689"},"PeriodicalIF":3.2,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148362387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Kidney Protection Options in 2025: Are Renin-Angiotensin System Inhibitors Still Needed?","authors":"Matthew R Weir","doi":"10.1016/j.semnephrol.2026.151688","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151688","url":null,"abstract":"<p><p>The therapeutic advantage of angiotensin-converting enzyme inhibitors was first described more than 40 years ago by Brenner and colleagues. Since then, a number of clinical trials have demonstrated the utility of drugs that modify the renin-angiotensin system (RAS) to slow the rate of progression of kidney disease in patients with and without diabetes. However, despite the well-known benefits of these drugs in reducing cardiorenal events, most clinicians are not using them consistently in their practice. The lack of use is related to concerns about increases in serum creatinine and the development of hyperkalemia. With the advent of many newer drugs to delay the progression of kidney disease and reduce the likelihood of cardiovascular events which have lesser effects on increasing serum creatinine or potassium, clinicians may prefer to use these therapies. Although trials of the newer cardiorenal protective therapies were conducted on the background of RAS inhibition, only the highest tolerated dose of RAS inhibition was used, a dose not shown to provide cardiorenal protection in a clinical trial. As multimodal therapy for slowing the progression of chronic kidney disease and reducing cardiovascular events moves into prime time, one has to wonder whether RAS inhibition will remain a foundation therapy.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151688"},"PeriodicalIF":3.5,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147349036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From Nephron Number to Global Health.","authors":"Valerie A Luyckx","doi":"10.1016/j.semnephrol.2026.151691","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151691","url":null,"abstract":"<p><p>In 1988, in a seminal paper, Brenner and colleagues proposed that the numbers of nephrons acquired in utero may be a factor that determines an individual's lifelong risk of kidney disease. The hypothesis posited that a kidney with fewer nephrons would have a reduced filtration surface, a reduced capacity to excrete sodium, and a limited capacity to compensate for additional kidney injury and nephron loss. These factors increase the risk of high blood pressure and kidney dysfunction. Potential clinical markers for such risk include preterm birth, small-for-gestational-age birth and low birth weight, which have been associated with reduced nephron numbers and with population-level risk of kidney disease and kidney failure. As such, these birth circumstances are now recognized in mainstream guidelines on the identification of individuals at risk of kidney disease. Importantly, these circumstances depend to a large degree on maternal health in pregnancy, which, in turn, depends on many social and structural determinants of health. Optimization of maternal, fetal, and child health through achievement of the sustainable development goals therefore offers an opportunity to mitigate the growing global burden of kidney disease through supporting healthy fetal kidney development and minimizing the accumulation of additional kidney stressors throughout life. Awareness of the importance of nephron number for individual kidney health could translate into strategies to promote global kidney health.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151691"},"PeriodicalIF":3.5,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147348999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Chronic Kidney Disease Progression Mechanisms: Why They Matter in an Era of Novel Kidney Protective Therapies.","authors":"Maarten W Taal","doi":"10.1016/j.semnephrol.2026.151692","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151692","url":null,"abstract":"<p><p>Research over several decades has identified multiple factors that contribute to a complex pathway of mechanisms that drive the progression of chronic kidney disease (CKD) across all etiologies. These include glomerular hypertension and hyperfiltration, proteinuria, and tubulointerstitial fibrosis. These endeavors identified multiple therapeutic targets for achieving kidney protection, starting with angiotensin II, which led to the development of renin-angiotensin-aldosterone system inhibitors as the first effective kidney protective therapies. Following a long period of stagnation, several additional kidney protective drug classes have been developed, including sodium glucose cotransporter 2 inhibitors, nonsteroidal mineralocorticoid antagonists, and glucagon-like peptide-1 receptor agonists. The effects of all of these drugs can readily be understood within the framework of previously described CKD progression mechanisms. The development of additional novel kidney protective drug classes has been informed by our understanding of progression mechanisms and include endothelin receptor antagonists, soluble guanylate cyclase stimulators or activators, and aldosterone synthase inhibitors. This review of novel therapies in the light of CKD progression mechanisms highlights the importance of ongoing research to identify new therapeutic targets as we seek to achieve complete arrest and even reversal of CKD progression.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151692"},"PeriodicalIF":3.5,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147318213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Role of the Epidermal Growth Factor Receptor in Kidney Tubulointerstitial Fibrosis.","authors":"Raymond C Harris, Ming-Zhi Zhang","doi":"10.1016/j.semnephrol.2026.151690","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151690","url":null,"abstract":"<p><p>Kidney fibrosis is a common cause of chronic kidney disease. Experimental studies have demonstrated a role for the epidermal growth factor receptor (EGFR) signaling pathway in mediating the development and progression of kidney fibrosis. Deletion of Rhbdf2 (iRhom2), a member of the rhomboid family that regulates A disintegrin and metalloproteinase domain 17-mediated release of membrane-anchored proteins, including EGFR ligands, inhibited kidney interstitial fibrosis, which was accompanied by decreased EGFR activation in interstitial fibroblasts/myofibroblasts. In addition, overexpression of another EGFR ligand, heparin-binding epidermal growth factor-like growth factor, induced interstitial fibrosis in kidneys. Although EGFR activation did not induce myofibroblast transformation, it was necessary for the initial pericyte/fibroblast migration and proliferation prior to subsequent myofibroblast transformation by transforming growth factor beta or other profibrotic factors. Therefore, EGFR activation in kidney fibroblasts and pericytes serves as a specific initiator of interstitial fibrosis in response to kidney injury by stimulating pericyte/fibroblast migration and proliferation. These findings may also provide insight into the development of fibrosis in other organs and in other conditions.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151690"},"PeriodicalIF":3.5,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147310066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Monica Cortinovis, Norberto Perico, Giuseppe Remuzzi
{"title":"Kidney Transplants From Marginal Donors: From Brenner's Abstract to Double Kidney Transplantation in Humans.","authors":"Monica Cortinovis, Norberto Perico, Giuseppe Remuzzi","doi":"10.1016/j.semnephrol.2026.151687","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151687","url":null,"abstract":"<p><p>\"In 1993, based on findings from their experimental studies of kidney mass manipulation in a rat kidney transplant model, Barry Brenner and his colleagues postulated that augmenting the number of viable nephrons in kidney transplantation to meet the recipient's metabolic and excretory demands may protect against long-term graft loss. This enlightening idea set the stage for the development and worldwide implementation of dual kidney transplant programs using organs from marginal-including older-donors. This concept was then complemented by robust clinical evidence that showed that a scoring system for pretransplant graft biopsies enabled the successful selection and allocation of kidneys from marginal donors for single or dual transplantation. Although these strategies have contributed significantly to expanding the kidney donor pool, the gap between supply and demand remains large, and closing it will likely require new sources, such as xenotransplantation.\" Giuseppe Remuzzi.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151687"},"PeriodicalIF":3.5,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147309928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Of Diuretics, Transporters, and Mechanisms of Hypertension.","authors":"Maria Castañeda-Bueno, Gerardo Gamba","doi":"10.1016/j.semnephrol.2026.151686","DOIUrl":"https://doi.org/10.1016/j.semnephrol.2026.151686","url":null,"abstract":"<p><p>As Director of the Renal Division at Brigham and Women's Hospital, Dr Barry Brenner established a molecular physiology laboratory during the 1980s by recruiting the appropriate researchers, with the vision that cloning the complementary DNA of membrane proteins would be a critical step in advancing the field. In the early 1990s, this laboratory identified and cloned several key complementary DNAs, including those for the renal sodium-chloride and sodium-potassium-chloride cotransporter, the inwardly rectifying renal outer medullary potassium channel, and the calcium-sensing receptor. In the present work, we discuss some of the many advances regarding the physiology and pathophysiology of salt transport in the kidney that have emerged over the last 30 years, advances made possible by the cloning of these genes and, ultimately, by the vision of Barry Brenner.</p>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":" ","pages":"151686"},"PeriodicalIF":3.5,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147310030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seminars in nephrologyPub Date : 2026-01-01Epub Date: 2025-10-08DOI: 10.1016/j.semnephrol.2025.151674
William T. Nash PhD , Mark D. Okusa MD
{"title":"Neuroimmune Regulation for Acute Kidney Injury Therapy: Insights Along the Path From Bench to Bedside","authors":"William T. Nash PhD , Mark D. Okusa MD","doi":"10.1016/j.semnephrol.2025.151674","DOIUrl":"10.1016/j.semnephrol.2025.151674","url":null,"abstract":"<div><div>Over the past 25 years, neuroimmune regulation has emerged as a compelling approach to the prevention and treatment of acute kidney injury. Vagus nerve stimulation through the cholinergic anti-inflammatory pathway can suppress inflammatory responses and demonstrate therapeutic potential in both animal disease models and a variety of human inflammatory conditions. The mechanisms underlying this neuroimmune-regulated protection are complex, but research undertaken since 2000 has significantly advanced our understanding of the key elements involved. This research has also yielded intriguing results and unexpected observations. In this review, we highlight current insights into vagus nerve–mediated neuroimmune regulation, areas of ongoing uncertainty, and promising directions for therapeutic modulation in AKI.</div></div>","PeriodicalId":21756,"journal":{"name":"Seminars in nephrology","volume":"46 1","pages":"Article 151674"},"PeriodicalIF":3.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145259175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}