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Updated: May 30, 2025
Murine Kidney Transplant Technique
Published on: October 20, 2015
Acute kidney injury in paediatric kidney transplant recipients
Barian Mohidin1, Stephen D Marks2,3
1NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK. barian.mohidin@nhs.net.
Insights
Acute kidney injury (AKI) is common in pediatric kidney transplant patients, often caused by infection or rejection. Early detection and understanding the cause are crucial for improving graft survival.
Area of Science:
- Nephrology
- Pediatric Transplantation
- Immunology
Background:
- Acute kidney injury (AKI) is a frequent complication in pediatric kidney transplant recipients.
- Infections (UTI) and rejection are leading causes, with surgical issues prominent early post-transplant.
- Allograft sensitivity to AKI is higher than native kidneys, necessitating prompt etiological assessment.
Purpose of the Study:
- To highlight the importance of identifying the treatable causes of AKI in pediatric kidney transplant recipients.
- To emphasize the diagnostic tools and differential diagnoses for allograft dysfunction.
- To underscore the need for early AKI detection for improved outcomes.
Main Methods:
- Review of clinical information, fluid balance, urine dipstick tests, and blood tests.
- Utilizing ultrasound and kidney transplant biopsy for diagnosis.
- Careful consideration of drug history, including supplements, and specific post-transplant complications like rejection and CNI toxicity.
Main Results:
- Distinguishing pre-renal and post-renal causes from intrinsic kidney disease is vital.
- Specific pathologies have seen significant advancements, improving graft survival over two decades.
- Ongoing research focuses on biomarkers for early AKI detection before creatinine elevation.
Conclusions:
- Prompt diagnosis and management of AKI in pediatric kidney transplant patients are critical for graft recovery and survival.
- A multi-factorial approach combining clinical assessment, imaging, and biopsy is essential.
- Future research into biomarkers promises earlier diagnosis and intervention.
Abstract:
Acute kidney injury (AKI) in paediatric kidney transplant recipients is common. Infection including urinary tract infection (UTI) and rejection are the most common causes in children. Surgical complications often cause AKI early post-transplant, whereas BK polyomavirus nephropathy rarely occurs in the first month post-transplant. Understanding kidney physiology helps to appreciate the sensitivity of the allograft to AKI, more so than native kidneys. Although the cause of AKI is often multi-factorial, there may be an underlying process that is treatable. Eliciting the aetiology, in this regard, is of paramount importance. Pre-renal and post-renal causes of allograft dysfunction are important to distinguish from intrinsic kidney disease. Clinical information and examination of fluid balance, urine dipstick testing, blood tests, bladder and kidney transplant ultrasound, and kidney transplant biopsy remain vital assessment tools in narrowing the differential diagnosis. A careful prescribed and recreational drug history is always warranted as many drugs including supplements are nephrotoxic. Additional causes such as allograft rejection, recurrent disease, and calcineurin inhibitor toxicity need to be considered in cases of allograft dysfunction, which would not affect the native kidneys. Early detection and assessment of AKI is crucial in promoting recovery. Significant progress has been made in specific pathologies over the last 20 years, which has improved kidney allograft survival rates considerably. Research into identifying AKI biomarkers to assist early diagnosis, before the serum creatinine rises, is ongoing.
