Cytoprotective Effects of Heme Oxygenase in Acute Renal Failure
Abstract
Following ischemia, superoxide is produced during the reperfusion phase in various organs. In renal pathophysiology, excess of free heme, which is released from hemeproteins under these conditions, catalyzes the formation of further reactive oxygen species to accelerate cellular injuries. There is accumulating evidence suggesting that transcriptional activation of heme oxygenase (HO)-1, the rate-limiting enzyme in heme degradation as well as the 32-kDa heat shock protein, participates in the defense against oxidative tissue injuries. Ischemia followed by reperfusion of the rat kidney accompanies significant induction of HO-1 mRNA, protein and enzyme activity, which is in part mediated through a rapid and transient increase in microsomal heme concentration. Inhibition of HO activity by tin mesoporphyrin results in a sustained and enhanced increase in microsomal heme content, and significantly exacerbates renal function. In contrast, SnCl2 treatment, which specifically induces HO-1 mRNA and protein in the proximal tubular epithelial cells, prevents the ischemia-reperfusion-mediated increase in microsomal heme concentration, and ameliorates the ischemic renal injury. In addition to these findings, recent evidence on the role of HO-1 in the kidney pathophysiology is summarized, with a particular emphasis on its protective role in the ischemic acute renal failure.
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Exogenously administered NGAL markedly upregulates heme oxygenase-1, a protective agent in experimental acute kidney injury.
“Exogenously administered NGAL also markedly upregulates heme oxygenase-1, a proven multifunctional protective agent in experimental Acute Kidney Injury (AKI) that is thought to work by limiting iron uptake, promoting intracellular iron release, enhancing production of antioxidants such as biliverdin and carbon monoxide, and inducing the cell cycle regulatory protein p21 [279,395,396].”
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Update on Mechanisms of Ischemic Acute Kidney Injury
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- Authors
- Akagi, R., Takahashi, T., & Sassa, S.
- Affiliations
- Okayama Prefectural University (JP)
- Okayama University (JP)
- Rockefeller University (US)
- ORCID
- Takahashi, Toru
- Venue
- Contributions to Nephrology
- Publisher
- KARGER
- Published
- 2005
- Volume
- 148
- Pages
- 70-85
- OpenAlex
- W1588064010
- Cited by
- 53
- References
- 85
- Citations by year
- 2024: 1 · 2022: 1 · 2021: 2 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 3 · 2014: 3 · 2013: 3 · 2012: 7
- FWCI
- 7.46
- Type
- book chapter
- Language
- en
- Open access
- closed
- Locations
- KARGER eBooks (publishedVersion)
- PubMed (publishedVersion)
- Funders
- U.S. Public Health Service
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heme Oxygenase-1 and Carbon Monoxide
- Health Sciences › Medicine › Nephrology › Acute Kidney Injury Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
- Keywords
- heme oxygenase-1, acute kidney injury, ischemia-reperfusion injury, renal ischemia, oxidative stress, superoxide, heme degradation, tin mesoporphyrin, tin(II) chloride, proximal tubular epithelial cells, cytoprotection
- MeSH terms
- Animals, Heme Oxygenase (Decyclizing), Humans, Membrane Proteins, Cytoprotection, Heme Oxygenase-1, Acute Kidney Injury
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