The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Purification from pig liver of a protein which protects liposomes and biomembranes from peroxidative degradation and exhibits glutathione peroxidase activity on phosphatidylcholine hydroperoxides
Abstract
The cell sap from pig liver contains a protein which protects phosphatidylcholine liposomes and biomembranes from peroxidative degradation in the presence of glutathione. The activity of this protein has been assayed by measuring the inhibition of aged phosphatidylcholine liposome peroxidation induced by the Fe3+-triethylenetetramine complex. The peroxidation-inhibiting protein from pig liver has been purified 585-fold to homogeneity with overall recovery of activity of 12%. (NH4)2SO4 precipitation, ion-exchange chromatography on DEAE-Sepharose CL-6B and CM23-cellulose, affinity chromatography on glutathione-bromosulfophthalein-Sepharose and gel filtration on Sephadex G-50 were used. Gel filtration and SDS- polyacrylamide gel electrophoresis indicated a molecular weight of approximately 20 000. The protein inhibited peroxidation by Fe3+-triethylenetetramine following a 15 min preincubation of phosphatidylcholine liposomes in the presence of 5mM glutathione or 2-mercapthoethanol. The pure protein exhibited glutathione peroxidase activity on hydroperoxide groups of phosphatidylcholine and on cumene and t-butyl hydroperoxides, with specific activities of 2.2, 3.8 and 0.9 mumol/min per mg protein, respectively. The protein appears to be distinct from the selenoenzyme glutathione peroxidase and from any known glutathione S-transferase. The peroxidation was studied also with fresh phosphatidylcholine liposomes and was induced in this case by Fe-ascorbate. To obtain protection by the peroxidation-inhibiting protein and glutathione, preincubation was not necessary, but alpha-tocopherol, incorporated in the liposomes in the molar ratio 1:250 to phosphatidylcholine, was required. Lipid peroxidation of rat liver mitoplasts and microsomes was blocked when these preparations were incubated in the peroxidizing mixture in the presence of peroxidation-inhibiting protein and glutathione. The protection from Fe3+-triethylenetetramine-induced peroxidation is related apparently to reduction of hydroperoxide groups in polyunsaturated fatty acid residues of phospholipids and to inhibition of free radicals formation by chain branching. Protection from the Fe-ascorbate-induced peroxidation is apparently attributable to the same mechanism. However, the requirement of alpha-tocopherol for protection in the Fe-ascorbate-induced peroxidation suggests that the cooperation of a free-radical scavenger is necessary. It is probable that the glutathione peroxidase activity is involved also in the glutathione-dependent protection exhibited by the protein on lipid peroxidation of biomembranes.
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“The term ferroptosis was introduced to describe cell death induced by the compound erastin, which causes glutathione depletion through the glutamate-cystine antiporter system Xc- inhibition and consequently glutathione peroxidase 4 (GPX4) inactivation leading to accumulation of lipid peroxides (Ursini et al., 1982; Dixon et al., 2012).”
From The Role of Iron Regulation in Immunometabolism and Immune-Related Disease (2019) · cites this paper as Ursini et al., 1982
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Ferroptosis: A Regulated Cell Death Nexus Linking Metabolism, Redox Biology, and Disease
Stockwell, B. R., Friedmann Angeli, J. P., Bayir, H., Bush, A. I., Conrad, M., Dixon, S. J., Fulda, S., Gascón, S., Hatzios, S. K., Kagan, V. E., et al. (2017) · Cell · doi:10.1016/j.cell.2017.09.021 · Cited by 7,695
Ferroptosis: mechanisms, biology and role in disease
Jiang, X., Stockwell, B. R., & Conrad, M. (2021) · Nature Reviews Molecular Cell Biology · doi:10.1038/s41580-020-00324-8 · Cited by 7,973
ACSL4 dictates ferroptosis sensitivity by shaping cellular lipid composition
Doll, S., Proneth, B., Tyurina, Y. Y., Panzilius, E., Kobayashi, S., Ingold, I., Irmler, M., Beckers, J., Aichler, M., Walch, A., et al. (2017) · Nature Chemical Biology · doi:10.1038/nchembio.2239 · Cited by 4,293
Ferroptosis turns 10: Emerging mechanisms, physiological functions, and therapeutic applications
Stockwell, B. R. (2022) · Cell · doi:10.1016/j.cell.2022.06.003 · Cited by 3,211
Targeting Ferroptosis as a Vulnerability in Cancer
Lei, G., Zhuang, L., & Gan, B. (2022) · Nature reviews. Cancer · doi:10.1038/s41568-022-00459-0 · Cited by 2,252
Metadata
- Authors
- Ursini, F., Maiorino, M., Valente, M., Ferri, L., & Gregolin, C.
- Affiliations
- University of Padua (IT)
- Venue
- Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism
- Publisher
- Elsevier BV
- Published
- 1982-02
- Volume
- 710
- Issue
- 2
- Pages
- 197-211
- ISSN
- 0005-2760 (ISSN-L)
- OpenAlex
- W1966920840
- Cited by
- 884
- References
- 25
- Citations by year
- 2026: 42 · 2025: 68 · 2024: 81 · 2023: 69 · 2022: 63 · 2021: 46 · 2020: 37 · 2019: 17 · 2018: 16 · 2017: 18 · 2016: 15 · 2015: 13 · 2014: 11 · 2013: 13 · 2012: 17
- FWCI
- 12.85
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism (publishedVersion)
- PubMed (publishedVersion)
- Padua Research Archive (University of Padova) (submittedVersion)
- Funders
- Regione del Veneto
- Topics
- Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
- Health Sciences › Medicine › Biochemistry (medical) › Antioxidant Activity and Oxidative Stress
- Keywords
- glutathione peroxidase activity, phosphatidylcholine liposomes, lipid peroxidation, glutathione, porcine liver, protein purification, triethylenetetramine, alpha-tocopherol, liver microsomes, hydroperoxide reduction, antioxidant enzymes, glutathione S-transferase, cumene hydroperoxide
- MeSH terms
- Animals, Glutathione Peroxidase, Kinetics, Lipid Peroxides, Liposomes, Liver, Membranes, Peroxidases, Peroxides, Phosphatidylcholines, Proteins, Subcellular Fractions, Swine
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