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Updated: Jun 4, 2026
Ischemia-reperfusion Model of Acute Kidney Injury and Post Injury Fibrosis in Mice
Published on: August 9, 2013
Spermidine/spermine-N¹-acetyltransferase in kidney ischemia reperfusion injury
Kamyar Zahedi1, Manoocher Soleimani
1Department of Surgery, Division of Nephrology and Hypertension, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
Abstract:
Ischemic reperfusion injuries such as acute renal failure, acute liver failure, stroke, and myocardial infarction are prevalent causes of morbidity and mortality. Kidney ischemic reperfusion injury is the leading cause of acute renal failure and dysfunction of transplanted kidneys. Although significant progress has been made in deciphering the factors that contribute to ischemic reperfusion injury, treatment options for these injuries remain scant. Identifying the molecules that contribute to ischemic reperfusion injury and can be therapeutically targeted will lead to development of new approaches for the treatment of such injuries. The expression of spermidine/spermine-N¹-acetyltransferase increases in the kidneys subjected to ischemic reperfusion injury. Furthermore, inactivation of the spermidine/spermine-N¹-acetyltransferase gene reduces the severity of kidney damage after ischemic reperfusion injury. Enhanced expression of spermidine/spermine-N¹-acetyltransferase in cultured cells leads to DNA damage, cell cycle arrest, and disruption of cell matrix interactions. The aforementioned observations strongly suggest that enhanced polyamine back conversion plays an important role in the mediation of tissue damage in renal Ischemic reperfusion injury.
Insights
Spermidine/spermine-N¹-acetyltransferase (SSAT) enhances kidney damage during ischemic reperfusion injury. Inactivating the SSAT gene significantly reduces this damage, suggesting SSAT as a therapeutic target for acute renal failure.
Area of Science:
- Biomedical Science
- Molecular Biology
- Pathophysiology
Background:
- Ischemic reperfusion injuries (IRIs) are major causes of organ damage and mortality.
- Acute renal failure and transplanted kidney dysfunction are frequently caused by kidney IRI.
- Current treatment options for IRIs are limited, highlighting the need for novel therapeutic targets.
Purpose of the Study:
- To investigate the role of spermidine/spermine-N¹-acetyltransferase (SSAT) in mediating kidney damage during IRI.
- To explore SSAT as a potential therapeutic target for renal IRI.
Main Methods:
- Analysis of SSAT gene expression in kidneys subjected to IRI.
- Assessment of kidney damage severity following SSAT gene inactivation in a mouse model.
- Evaluation of cellular effects of enhanced SSAT expression in cultured cells, including DNA damage, cell cycle arrest, and cell-matrix interactions.
Main Results:
- SSAT expression is upregulated in kidneys affected by IRI.
- Inactivation of the SSAT gene significantly mitigates kidney damage following IRI.
- Increased SSAT expression in cells induces DNA damage, cell cycle arrest, and disrupts cell-matrix interactions.
Conclusions:
- Enhanced polyamine back conversion, mediated by SSAT, plays a critical role in tissue damage during renal IRI.
- Targeting SSAT presents a promising therapeutic strategy for mitigating kidney damage in IRI.
