4.4 Review

Chronic Kidney Disease of Undetermined Etiology around the World

Journal

KIDNEY & BLOOD PRESSURE RESEARCH
Volume 46, Issue 2, Pages 142-151

Publisher

KARGER
DOI: 10.1159/000513014

Keywords

Chronic kidney disease; Etiology; Mesoamerican nephropathy; Chronic kidney disease of uncertain etiology

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This review explores the epidemiology, potential factors, clinical features, and geographical peculiarities of CKDu, focusing on the etiology of the disease and the need for preventive measures in areas where renal replacement therapy is not widely available. Innovative healthcare solutions, social policies, and collaborative clinical research projects are essential to better understand and address the factors contributing to the promotion and progression of CKDu.
Background: Epidemics of chronic kidney disease of uncertain etiology (CKDu) are occurring on the Pacific coast of Central America, in Sri Lankan and Indian agricultural communities, and in other hotspots around the world. CKDu primarily affects male agricultural workers, and traditional risk factors such as diabetes and hypertension are not involved in the pathogenesis. Although a causal factor has not yet been identified, culprits include repeated volume depletion-induced kidney injury, as well as exposure to agrichemicals, heavy metals and nephrotoxins contained in drugs, beverages, and traditional medications. Multiple risk factors may interact in a synergistic fashion thus resulting in chronic kidney damage. The absence of undefined protective factors may amplify the risk. Summary: This review focuses on the current understanding of CKDu by analyzing epidemiology, potential risk factors, and clinical and pathological features as well as geographical peculiarities of each disease. We also focus our attention on the etiology of these conditions in which multiple factors may synergistically contribute to the development and progression of the disease. The last part of the manuscript is dedicated to the research agenda and practical recommendations. Key Messages: Since renal replacement therapy is not extensively available in areas where CKDu is widespread, prevention by avoiding all known potential risk factors is crucial. Innovative healthcare solutions and social policies in endemic areas along with collaborative clinical research projects are needed to better identify factors involved in disease promotion and progression.

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