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Updated: Jun 8, 2026

Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
Published on: November 21, 2025
Kidney injury molecule-1
1Renal Division, Brigham and Women's Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA. joseph_bonventre@hms.harvard.edu
Purpose Of Review:
To review the new findings about the physiological roles of kidney injury molecule-1 (KIM-1) and the rapidly expanding evidence for this molecule as a promising biomarker in preclinical kidney toxicity evaluation and various human kidney diseases.
Recent Findings:
KIM-1 has attracted increasing interest because of its possible pathophysiological role in modulating tubular damage and repair. There is rapidly accumulating evidence from both animal models and clinical studies that urinary KIM-1 is a sensitive and specific urinary biomarker for various forms of nephrotoxic injury, cardiac surgery-induced kidney injury, transplant rejection, and chronic kidney diseases.
Summary:
KIM-1 mediates epithelial phagocytosis in the injured kidney converting the proximal epithelial cell into a phagocyte, with potentially important pathophysiological implications for modulation of the immune response and repair process after injury. KIM-1 serves as a highly sensitive and specific urinary biomarker for kidney injury and may also be a therapeutic target for various kidney diseases.
Insights
Kidney injury molecule-1 (KIM-1) plays a role in kidney repair and serves as a sensitive biomarker for various kidney diseases. New findings highlight its potential in preclinical toxicity evaluation and as a therapeutic target.
Area of Science:
- Nephrology
- Biomarker Discovery
- Molecular Biology
Background:
- Kidney injury molecule-1 (KIM-1) is increasingly recognized for its potential pathophysiological role in kidney injury.
- Evidence is rapidly accumulating regarding KIM-1's involvement in tubular damage and repair processes.
Purpose of the Study:
- To review novel findings on the physiological functions of KIM-1.
- To assess the growing evidence supporting KIM-1 as a biomarker in preclinical kidney toxicity and human kidney diseases.
Main Methods:
- Literature review of preclinical and clinical studies.
- Analysis of research on KIM-1's role in kidney pathophysiology.
Main Results:
- Urinary KIM-1 is a sensitive and specific biomarker for various kidney injuries, including nephrotoxic injury, cardiac surgery-induced acute kidney injury, transplant rejection, and chronic kidney diseases.
- KIM-1 mediates epithelial phagocytosis in injured kidneys, transforming proximal epithelial cells into phagocytes.
Conclusions:
- KIM-1 has significant pathophysiological implications for immune response modulation and repair post-kidney injury.
- KIM-1 is a highly sensitive and specific urinary biomarker for kidney injury and a potential therapeutic target for kidney diseases.
Related Concept Videos
Acute Kidney Injury I: Introduction
Acute Kidney Injury II: Pathophysiology
Acute Kidney Injury IV: Diagnostic Studies and Prevention
Acute Kidney Injury III: Clinical Manifestations
Acute Kidney Injury V: Interprofessional Care
Acute Kidney Injury VI: Nursing Management
