Circulating Mitochondrial DAMPs Are Not Effective Inducers of Proteinuria and Kidney Injury in Rodents
Open accessAbstract
Mitochondria in eukaryotic cells are derived from bacteria in evolution. Like bacteria, mitochondria contain DNA with unmethylated CpG motifs and formyl peptides, both of which have recently been shown to be damage associated molecular patterns (DAMPs) and induce immune response and cell injury. Based on the facts that circulating mitochondrial DAMPs (mtDAMPs) are increased in the patients of trauma or burn injury who also have proteinuria, that mtDAMPs can activate immune cells which in turn secrete glomerular permeability factors, that renal intrinsic cells express a variety of DAMP receptors, and that mtDAMPs can directly increase endothelial cell permeability in vitro, we hypothesized that mtDAMPs may be novel circulating factors inducing proteinuria and kidney injury. We tested this hypothesis by directly injecting mtDAMPs into rodents and examining urinary protein and kidney histology. We prepared mtDAMP samples, including mitochondrial DNA (mtDNA) and mitochondrial debris (MTD), from rodent liver. In mice, injection of mtDNA for 20 μg/ml initial concentration in circulation (much higher than the clinical range), did not cause any renal manifestations. However, an increased dose leading to 45 μg/ml initial concentration in circulation resulted in a transient, slight increase in urinary albumin. In rats, MTD injection resulting in 450 μg/ml initial concentration of MTD protein in circulation, which was much higher than the clinical range, caused mild, transient proteinuria and lung lesions. Multiple injections of such large amount of either mtDNA or MTD into rodents on 3 consecutive days also failed in inducing proteinuria and kidney injury. In summary, clinical levels of circulating mtDAMPs do not induce proteinuria and clinically irrelevant high levels of mtDAMPs cause only a transient and slight increase in urinary protein in rodents, suggesting that circulating mtDAMPs may not be responsible for the proteinuria and kidney injury in patients with trauma, burn injury, and other diseases.
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Intravenous injection of mtDNA into mice failed to induce proteinuria and kidney damage.
“the intravenous injection of mtDNA into mice failed to induce proteinuria and kidney damage68”
From Anti-mitochondrial autoantibodies in systemic lupus erythematosus and their association with disease manifestations (2019) · cites this paper as [68]
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- Authors
- He, J., Lu, Y., Xia, H., Liang, Y., Wang, X., Bao, W., Yun, S., Ye, Y., Zheng, C., Liu, Z., & Shi, S.
- Affiliations
- Nanjing General Hospital of Nanjing Military Command (CN)
- Corresponding author
- Liu, Zhihong
- Shi, Shaolin
- Venue
- PLOS ONE
- Publisher
- Public Library of Science (PLoS)
- Published
- 2015-04-22
- Volume
- 10
- Issue
- 4
- Pages
- e0124469
- ISSN
- 1932-6203 (ISSN-L)
- PMC
- PMC4406729
- OpenAlex
- W2085148213
- Cited by
- 20
- References
- 42
- Citations by year
- 2022: 2 · 2021: 1 · 2020: 2 · 2019: 3 · 2018: 4 · 2017: 3 · 2016: 4 · 2015: 1
- FWCI
- 3.47
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- PLoS ONE (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Figshare (submittedVersion, cc-by)
- Funders
- National Natural Science Foundation of China (30900686, 973 Program, 81370827, 2012CB517600)
- Government of Jiangsu Province
- Natural Science Foundation of Jiangsu Province (BK20131324, 2012CB517600)
- National Key Research and Development Program of China (2012CB517600, 2012CB517606)
- Topics
- Health Sciences › Medicine › Nephrology › Acute Kidney Injury Research
- Health Sciences › Medicine › Nephrology › Renal Diseases and Glomerulopathies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
- Keywords
- mitochondrial DAMPs, damage-associated molecular patterns, mitochondrial DNA, proteinuria, kidney injury, glomerular permeability, endothelial permeability, trauma (physical injury), burns, urinary albumin, rodent models
- MeSH terms
- Animals, DNA, Mitochondrial, Kidney, Kidney Diseases, Kinetics, Liver, Lung, Mice, Inbred BALB C, Mitochondria, Neutrophils, Proteinuria, Rats, Sprague-Dawley
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