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Disentangling the role of environmental factors in the CKDu epidemic

Chronic kidney disease of unknown origin (CKDu) has been reported in various tropical settings over the past 20 years, but clarity on key disease drivers is lacking. Several factors have slowed progress in understanding this disease or diseases, including low research funding, difficult case definition and multiple risk factors for kidney disease.

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References

  1. WHO. Report of the International Expert Consultation on Chronic Kidney Disease of Unknown Etiology (CKDu) in Sri Lanka (WHO, 2016).

  2. Yang, H.-Y. et al. Environmental risk factors for chronic kidney disease of non-traditional causes in tropical coastal areas: a systematic review and meta-analysis. PLoS Negl. Trop. Dis. 19, e0013056 (2025).

    Article  PubMed  PubMed Central  Google Scholar 

  3. Pett, J. et al. Two decades of chronic kidney disease of unknown aetiology (CKDu) research: existing evidence and persistent gaps from epidemiological studies in Sri Lanka. Nephrology 27, 238–247 (2022).

    Article  CAS  PubMed  Google Scholar 

  4. Pearce, N. & Caplin, B. Let’s take the heat out of the CKDu debate: more evidence is needed. Occup. Environ. Med. 76, 357–359 (2019).

    Article  PubMed  PubMed Central  Google Scholar 

  5. Drechsel, P., Madhuwanthi, P., Nisansala, D., Ramamoorthi, D. & Bandara, T. On the feasibility of an agricultural revolution: Sri Lanka’s ban of chemical fertilizers in 2021. Food Secur. 17, 585–602 (2025).

    Article  Google Scholar 

  6. Fischer, R. S. B. et al. Early detection of acute tubulointerstitial nephritis in the genesis of Mesoamerican nephropathy. Kidney Int. 93, 681–690 (2018).

    Article  PubMed  Google Scholar 

  7. Wijkström, J. et al. Morphological and clinical findings in Sri Lankan patients with chronic kidney disease of unknown cause (CKDu): similarities and differences with Mesoamerican nephropathy. PLoS ONE 13, e0193056 (2018).

    Article  PubMed  PubMed Central  Google Scholar 

  8. Madero, M. & Parameswaran, S. Chronic kidney disease of unknown origin, a tubulointerstitial disease. Adv. Kidney Dis. Health 32, 350–356 (2025).

    Article  PubMed  Google Scholar 

  9. Kim, K.-H., Kabir, E. & Jahan, S. A. Exposure to pesticides and the associated human health effects. Sci. Total Environ. 575, 525–535 (2017).

    Article  CAS  PubMed  Google Scholar 

  10. McMichael, A. J. Prisoners of the proximate: loosening the constraints on epidemiology in an age of change. Am. J. Epidemiol. 149, 887–897 (1999).

    Article  CAS  PubMed  Google Scholar 

  11. Gagnon, D., Schlader, Z. J. & Jay, O. The physiology behind the epidemiology of heat-related health impacts. Physiology https://doi.org/10.1152/physiol.00012.2025 (2026).

    Article  PubMed  Google Scholar 

  12. Divine, J. G. et al. American football players in preseason training at risk of acute kidney injury without signs of rhabdomyolysis. Clin. J. Sport Med. 30, 556–561 (2020).

    Article  PubMed  Google Scholar 

  13. Chapman, C. L., Johnson, B. D., Sackett, J. R., Parker, M. D. & Schlader, Z. J. Soft drink consumption during and following exercise in the heat elevates biomarkers of acute kidney injury. Am. J. Physiol. Regul. Integr. Comp. Physiol. 316, R189–R198 (2019).

    Article  PubMed  Google Scholar 

  14. Mahajan, P., Uddin, S., Hajati, F. & Moni, M. A. Ensemble learning for disease prediction: a review. Healthcare https://doi.org/10.3390/healthcare11121808 (2023).

    Article  PubMed  PubMed Central  Google Scholar 

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Correspondence to Nicholas J. Osborne.

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Osborne, N.J. Disentangling the role of environmental factors in the CKDu epidemic. Nat Rev Nephrol 22, 176–177 (2026). https://doi.org/10.1038/s41581-026-01054-4

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