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Looking for a partner: ceruloplasmin in protein-protein interactions. Biometals 2019; 32:195-210. [PMID: 30895493 DOI: 10.1007/s10534-019-00189-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 03/18/2019] [Indexed: 10/27/2022]
Abstract
Ceruloplasmin (CP) is a mammalian blood plasma ferroxidase. More than 95% of the copper found in plasma is carried by this protein, which is a member of the multicopper oxidase family. Proteins from this group are able to oxidize substrates through the transfer of four electrons to oxygen. The essential role of CP in iron metabolism in humans is particularly evident in the case of loss-of-function mutations in the CP gene resulting in a neurodegenerative syndrome known as aceruloplasminaemia. However, the functions of CP are not limited to the oxidation of ferrous iron to ferric iron, which allows loading of the ferric iron into transferrin and prevents the deleterious reactions of Fenton chemistry. In recent years, a number of novel CP functions have been reported, and many of these functions depend on the ability of CP to form stable complexes with a number of proteins.
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Sokolov A, Kostevich V, Varfolomeeva E, Grigorieva D, Gorudko I, Kozlov S, Kudryavtsev I, Mikhalchik E, Filatov M, Cherenkevich S, Panasenko O, Arnhold J, Vasilyev V. Capacity of ceruloplasmin to scavenge products of the respiratory burst of neutrophils is not altered by the products of reactions catalyzed by myeloperoxidase. Biochem Cell Biol 2018; 96:457-467. [DOI: 10.1139/bcb-2017-0277] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
CP is a copper-containing ferroxidase of blood plasma, which acts as an acute phase reactant during inflammation. The effect of oxidative modification of CP induced by oxidants produced by MPO, such as HOCl, HOBr, and HOSCN, on its spectral, enzymatic, and anti-inflammatory properties was studied. We monitored the chemiluminescence of lucigenin and luminol along with fluorescence of hydroethidine and scopoletin to assay the inhibition by CP of the neutrophilic respiratory burst induced by PMA or fMLP. Superoxide dismutase activity of CP and its capacity to reduce the production of oxidants in respiratory burst of neutrophils remained virtually unchanged upon modifications caused by HOCl, HOBr, and HOSCN. Meanwhile, the absorption of type I copper ions at 610 nm became reduced, along with a drop in the ferroxidase and amino oxidase activities of CP. Likewise, its inhibitory effect on the halogenating activity of MPO was diminished. Sera of either healthy donors or patients with Wilson disease were co-incubated with neutrophils from healthy volunteers. In these experiments, we observed an inverse relationship between the content of CP in sera and the rate of H2O2 production by activated neutrophils. In conclusion, CP is likely to play a role of an anti-inflammatory factor tempering the neutrophil respiratory burst in the bloodstream despite the MPO-mediated oxidative modifications.
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Affiliation(s)
- A.V. Sokolov
- FSBSI Institute of Experimental Medicine, Saint-Petersburg 197376, Russia
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
- Saint-Petersburg State University, Saint-Petersburg 199034, Russia
- Centre of Preclinical Translational Research, Almazov National Medical Research Centre, Saint-Petersburg 197371, Russia
| | - V.A. Kostevich
- FSBSI Institute of Experimental Medicine, Saint-Petersburg 197376, Russia
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
| | - E.Y. Varfolomeeva
- National Research Centre “Kurchatov Institute” B.P. Konstantinov Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
| | - D.V. Grigorieva
- Department of Biophysics, Belarusian State University, Minsk 220030, Belarus
| | - I.V. Gorudko
- Department of Biophysics, Belarusian State University, Minsk 220030, Belarus
| | - S.O. Kozlov
- FSBSI Institute of Experimental Medicine, Saint-Petersburg 197376, Russia
| | - I.V. Kudryavtsev
- FSBSI Institute of Experimental Medicine, Saint-Petersburg 197376, Russia
- Far Eastern Federal University, Vladivostok 690090, Russia
| | - E.V. Mikhalchik
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
| | - M.V. Filatov
- National Research Centre “Kurchatov Institute” B.P. Konstantinov Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
| | - S.N. Cherenkevich
- Department of Biophysics, Belarusian State University, Minsk 220030, Belarus
| | - O.M. Panasenko
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
- Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - J. Arnhold
- Institute for Medical Physics and Biophysics, Medical Faculty, University of Leipzig, Leipzig 04107, Germany
| | - V.B. Vasilyev
- FSBSI Institute of Experimental Medicine, Saint-Petersburg 197376, Russia
- Saint-Petersburg State University, Saint-Petersburg 199034, Russia
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Fine Regulation of Neutrophil Oxidative Status and Apoptosis by Ceruloplasmin and Its Derivatives. Cells 2018; 7:cells7010008. [PMID: 29329239 PMCID: PMC5789281 DOI: 10.3390/cells7010008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 12/30/2017] [Accepted: 01/10/2018] [Indexed: 01/27/2023] Open
Abstract
Timely neutrophil apoptosis is an essential part of the resolution phase of acute inflammation. Ceruloplasmin, an acute-phase protein, which is the predominant copper-carrying protein in the blood, has been suggested to have a marked effect on neutrophil life span. The present work is a comparative study on the effects of intact holo-ceruloplasmin, its copper-free (apo-) and partially proteolyzed forms, and synthetic free peptides RPYLKVFNPR (883-892) and RRPYLKVFNPRR (882-893) on polymorphonuclear leukocyte (PMNL, neutrophil) oxidant status and apoptosis. The most pronounced effect on both investigated parameters was found with copper-containing samples, namely, intact and proteolyzed proteins. Both effectively reduced spontaneous and tumor necrosis factor-α (TNF-α)-induced extracellular and intracellular accumulation of superoxide radicals, but induced a sharp increase in the oxidation of intracellular 2',7'-dichlorofluorescein upon short exposure. Therefore, intact and proteolyzed ceruloplasmin have both anti- and pro-oxidant effects on PMNLs wherein the latter effect is diminished by TNF-α and lactoferrin. Additionally, all compounds investigated were determined to be inhibitors of delayed spontaneous apoptosis. Intact enzyme retained its pro-survival activity, whereas proteolytic degradation converts ceruloplasmin from a mild inhibitor to a potent activator of TNF-α-induced neutrophil apoptosis.
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Golenkina EA, Livenskyi AD, Viryasova GM, Romanova YM, Sud’ina GF, Sokolov AV. Ceruloplasmin-derived peptide is the strongest regulator of oxidative stress and leukotriene synthesis in neutrophils. Biochem Cell Biol 2017; 95:445-449. [DOI: 10.1139/bcb-2016-0180] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Ceruloplasmin, an acute-phase protein, can affect the activity of leukocytes through its various enzymatic activities and protein–protein interactions (with lactoferrin, myeloperoxidase, eosinophil peroxidase, serprocidins, and 5-lipoxygenase (5-LOX), among others). However, the molecular mechanisms of ceruloplasmin activity are not clearly understood. In this study, we tested the ability of two synthetic peptides, RPYLKVFNPR (883–892) (P1) and RRPYLKVFNPRR (882–893) (P2), corresponding to the indicated fragments of the ceruloplasmin sequence, to affect neutrophil activation. Leukotriene (LT) B4 is the primary eicosanoid product of polymorphonuclear leukocytes (PMNLs, neutrophils). We studied leukotriene synthesis in PMNLs upon interaction with Salmonella enterica serovar Typhimurium. Priming of neutrophils with phorbol 12-myristate 13-acetate (PMA) elicited the strong regulatory function of P2 peptide as a superoxide formation inducer and leukotriene synthesis inhibitor. Ceruloplasmin-derived P2 peptide appeared to be a strong inhibitor of 5-LOX product synthesis under conditions of oxidative stress.
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Affiliation(s)
- Ekaterina A. Golenkina
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Alexey D. Livenskyi
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Galina M. Viryasova
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Yulia M. Romanova
- Gamaleya Research Institute of Epidemiology and Microbiology, Moscow 123098, Russia
| | - Galina F. Sud’ina
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Alexey V. Sokolov
- FSBSI “Institute of Experimental Medicine”, St. Petersburg 197376, Russia
- Saint-Petersburg State University, St. Petersburg 199034, Russia
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Panasenko OM, Mikhalchik EV, Gorudko IV, Grigorieva DV, Sokolov AV, Kostevich VA, Vasilyev VB, Cherenkevich SN. The effects of antioxidants and hypohalous acid scavengers on neutrophil activation by hypochlorous acid-modified low-density lipoproteins. Biophysics (Nagoya-shi) 2016. [DOI: 10.1134/s0006350916030131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Varfolomeeva EY, Semenova EV, Sokolov AV, Aplin KD, Timofeeva KE, Vasilyev VB, Filatov MV. Ceruloplasmin decreases respiratory burst reaction during pregnancy. Free Radic Res 2016; 50:909-19. [DOI: 10.1080/10715762.2016.1197395] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Increased ω-3 polyunsaturated fatty acid/arachidonic acid ratios and upregulation of signaling mediator in individuals with autism spectrum disorders. Life Sci 2015; 145:205-12. [PMID: 26724495 DOI: 10.1016/j.lfs.2015.12.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 11/15/2015] [Accepted: 12/22/2015] [Indexed: 12/20/2022]
Abstract
AIMS The investigation of links between the ratio of omega-3/omega-6 PUFAs and neuronal signaling is a research priority in autism spectrum disorders (ASD). MAIN METHODS We examine the relationships between the plasma ratios of docosahexaenoid acid (DHA)/arachidonic acid (AA) and eicopentaenoic acid (EPA)/AA and biomarkers of AA-related signaling mediators such as ceruloplasmin, transferrin and superoxide dismutase, in the behavioral symptoms of 28 individuals with ASD (mean age 13.5±4.6years) and 21 age- and gender-matched normal healthy controls (mean age 13.9±5.7years). Behavioral symptoms were assessed using the Aberrant Behavior Checklists (ABC). We conducted controlling for dietary intake and assessed the dietary intake of nutrients. KEY FINDINGS There were no significant differences in intake of nutrients such as omega-3 and omega-6 PUFAs, saturated and unsaturated fatty acid, DHA, AA, iron and copper. Plasma EPA, DHA, and arachidic acid levels, and plasma DHA/AA and EPA/AA ratios were significantly higher, while plasma AA and adrenic acid were significantly lower in the 28 individuals with ASD than in the 21 normal controls. The ABC scores were significantly higher in the ASD group compared to the control group. The plasma ceruloplasmin levels in the ASD group were significantly reduced compared to those in the control group. SIGNIFICANCE Increased plasma DHA/AA and EPA/AA ratios may be related to low plasma levels of ceruloplasmin which has neuroprotective properties. Reduced plasma ceruloplasmin levels may diminish the protective capacity against brain damage, and may contribute to the pathophysiology of behavioral symptoms in individuals with ASD.
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Yui K, Imataka G, Kawasaki Y, Yamada H. Down-regulation of a signaling mediator in association with lowered plasma arachidonic acid levels in individuals with autism spectrum disorders. Neurosci Lett 2015; 610:223-8. [PMID: 26552013 DOI: 10.1016/j.neulet.2015.11.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/03/2015] [Accepted: 11/04/2015] [Indexed: 12/28/2022]
Abstract
Previous studies have indicated that the altered composition of polyunsaturated fatty acids (PUFAs) might contribute to the pathophysiology of autism spectrum disorder (ASD). We examined the relationship between the plasma fatty acid levels, expressed as μg/ml, and the plasma levels of biomarkers of AA-related signaling mediators, such as ceruloplasmin, transferrin and superoxide dismutase, and assessed the behavioral symptoms of 30 individuals with ASD (mean age, 13.6 ± 4.3 years old) compared with 20 age- and gender-matched normal controls (mean age, 13.2 ± 5.4 years old) using Aberrant Behavior Checklists (ABC). The plasma levels of EPA and the plasma ratios of EPA/AA were significantly higher, while the plasma levels of AA and metabolites, such as 5,8,11,14-eicosatetraenoic acid, adrenic acid, and ceruloplasmin (Cp), were significantly lower in the 30 individuals with ASD compared with the 20 normal controls. The ABC scores were significantly increased in the ASD group compared with those of the control group. Thus, the results of the present study revealed that reduced plasma levels of AA and metabolites in association with high plasma EPA/AA ratios might down-regulate AA-related signaling mediators, such as Cp. Subsequently, reduced plasma Cp levels might reduce the protective capacity for brain damage, resulting in the pathophysiology underlying the behavioral symptoms in individuals with ASD. These findings suggest that reduced plasma AA levels may downregulate Cp.
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Affiliation(s)
- Kunio Yui
- Research Institute of Pervasive Developmental Disorders, Ashiya University, 13-22 Rokurokusocho, Ashiya, 659-8511 Hyogo, Japan.
| | - George Imataka
- Department of Pediatrics, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, 321-0293 Tochigi, Japan
| | - Yohei Kawasaki
- Department of Drug Evaluation and Information, School of Pharmaceutical Science University of Shizuoka, 52-1 Tada, Shizuoka 422-8526, Japan
| | - Hiroshi Yamada
- Department of Drug Evaluation and Information, School of Pharmaceutical Science University of Shizuoka, 52-1 Tada, Shizuoka 422-8526, Japan
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Sokolov AV, Acquasaliente L, Kostevich VA, Frasson R, Zakharova ET, Pontarollo G, Vasilyev VB, De Filippis V. Thrombin inhibits the anti-myeloperoxidase and ferroxidase functions of ceruloplasmin: relevance in rheumatoid arthritis. Free Radic Biol Med 2015; 86:279-94. [PMID: 26001728 DOI: 10.1016/j.freeradbiomed.2015.05.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/24/2015] [Accepted: 05/12/2015] [Indexed: 01/29/2023]
Abstract
Human ceruloplasmin (CP) is a multifunctional copper-binding protein produced in the liver. CP oxidizes Fe(2+) to Fe(3+), decreasing the concentration of Fe(2+) available for generating harmful oxidant species. CP is also a potent inhibitor of leukocyte myeloperoxidase (MPO) (Kd=130nM), a major source of oxidants in vivo. Rheumatoid arthritis (RA) is an inflammatory autoimmune disease affecting flexible joints and characterized by activation of both inflammatory and coagulation processes. Indeed, the levels of CP, MPO, and thrombin are markedly increased in the synovial fluid of RA patients. Here we show that thrombin cleaves CP in vitro at (481)Arg-Ser(482) and (887)Lys-Val(888) bonds, generating a nicked species that retains the native-like fold and the ferroxidase activity of the intact protein, whereas the MPO inhibitory function of CP is abrogated. Analysis of the synovial fluid of 24 RA patients reveals that CP is proteolytically degraded to a variable extent, with a fragmentation pattern similar to that observed with thrombin in vitro, and that proteolysis is blocked by hirudin, a highly potent and specific thrombin inhibitor. Using independent biophysical techniques, we show that thrombin has intrinsic affinity for CP (Kd=60-270nM), independent of proteolysis, and inhibits CP ferroxidase activity (KI=220±20nM). Mapping of thrombin binding sites with specific exosite-directed ligands (i.e., hirugen, fibrinogen γ'-peptide) and thrombin analogues having the exosites variably compromised (i.e., prothrombin, prethrombin-2, βT-thrombin) reveals that the positively charged exosite-II of thrombin binds to the negatively charged upper region of CP, while the protease active site and exosite-I remain accessible. These results suggest that thrombin can exacerbate inflammation in RA by impairing the MPO inhibitory function of CP via proteolysis and by competitively inhibiting CP ferroxidase activity. Notably, local administration of hirudin, a highly potent and specifc thrombin inhibitor, reduces the concentration of active MPO in the synovial fluid of RA patients and has a beneficial effect on the clinical symptoms of the disease.
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Affiliation(s)
- Alexej V Sokolov
- Institute for Experimental Medicine, Pavlov str., 12, Saint Petersburg, 197376 Russia; State University of Saint Petersburg, University Embankment, 4-7, Saint Petersburg, 199034 Russia
| | - Laura Acquasaliente
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, via Marzolo, 5, Padua, 35131 Italy
| | - Valeria A Kostevich
- Institute for Experimental Medicine, Pavlov str., 12, Saint Petersburg, 197376 Russia
| | - Roberta Frasson
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, via Marzolo, 5, Padua, 35131 Italy
| | - Elena T Zakharova
- Institute for Experimental Medicine, Pavlov str., 12, Saint Petersburg, 197376 Russia
| | - Giulia Pontarollo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, via Marzolo, 5, Padua, 35131 Italy
| | - Vadim B Vasilyev
- Institute for Experimental Medicine, Pavlov str., 12, Saint Petersburg, 197376 Russia; State University of Saint Petersburg, University Embankment, 4-7, Saint Petersburg, 199034 Russia
| | - Vincenzo De Filippis
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, via Marzolo, 5, Padua, 35131 Italy.
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Kostevich VA, Sokolov AV, Grudinina NA, Zakharova ET, Samygina VR, Vasilyev VB. Interaction of macrophage migration inhibitory factor with ceruloplasmin: role of labile copper ions. Biometals 2015; 28:817-26. [DOI: 10.1007/s10534-015-9868-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 06/11/2015] [Indexed: 02/06/2023]
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Sokolov AV, Kostevich VA, Kozlov SO, Donskyi IS, Vlasova II, Rudenko AO, Zakharova ET, Vasilyev VB, Panasenko OM. Kinetic method for assaying the halogenating activity of myeloperoxidase based on reaction of celestine blue B with taurine halogenamines. Free Radic Res 2015; 49:777-89. [DOI: 10.3109/10715762.2015.1017478] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sokolov AV, Kostevich VA, Zakharova ET, Samygina VR, Panasenko OM, Vasilyev VB. Interaction of ceruloplasmin with eosinophil peroxidase as compared to its interplay with myeloperoxidase: Reciprocal effect on enzymatic properties. Free Radic Res 2015; 49:800-11. [DOI: 10.3109/10715762.2015.1005615] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Sokolov AV, Zakharova ET, Zakahrova ET, Kostevich VA, Samygina VR, Vasilyev VB. Lactoferrin, myeloperoxidase, and ceruloplasmin: complementary gearwheels cranking physiological and pathological processes. Biometals 2014; 27:815-28. [PMID: 24966132 DOI: 10.1007/s10534-014-9755-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/30/2014] [Indexed: 12/17/2022]
Abstract
Copper-containing plasma protein ceruloplasmin (Cp) forms a complex with lactoferrin (Lf), an iron-binding protein, and with the heme-containing myeloperoxidase (Mpo). In case of inflammation, Lf and Mpo are secreted from neutrophil granules. Among the plasma proteins, Cp seems to be the preferential partner of Lf and Mpo. After an intraperitoneal injection of Lf to rodents, the "Cp-Lf" complex has been shown to appear in their bloodstream. Cp prevents the interaction of Lf with protoplasts of Micrococcus luteus. Upon immunoprecipitation of Cp, the blood plasma becomes depleted of Lf and in a dose-dependent manner loses the capacity to inhibit the peroxidase activity of Mpo, but not the Mpo-catalyzed oxidation of thiocyanate in the (pseudo)halogenating cycle. Antimicrobial effect against E. coli displayed by a synergistic system that includes Lf and Mpo-H2O2-chloride, but not thiocyanate, as the substrate for Mpo is abrogated when Cp is added. Hence, Cp can be regarded as an anti-inflammatory factor that restrains the halogenating cycle and redirects the synergistic system Mpo-H2O2-chloride/thiocyanate to production of hypothiocyanate, which is relatively harmless for the human organism. Structure and functions of the "2Cp-2Lf-Mpo" complex and binary complexes Cp-Lf and 2Cp-Mpo in inflammation are discussed.
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Affiliation(s)
- Alexey V Sokolov
- N-W Branch of the Russian Academy of Medical Sciences, Institute for Experimental Medicine, Pavlov Street 12, Saint Petersburg, 197376, Russia,
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Sokolov AV, Kostevich VA, Romanico DN, Zakharova ET, Vasilyev VB. Two-stage method for purification of ceruloplasmin based on its interaction with neomycin. BIOCHEMISTRY (MOSCOW) 2012; 77:631-8. [DOI: 10.1134/s0006297912060107] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sokolov AV, Solovyov KV, Kostevich VA, Chekanov AV, Pulina MO, Zakharova ET, Shavlovski MM, Panasenko OM, Vasilyev VB. Protection of ceruloplasmin by lactoferrin against hydroxyl radicals is pH dependent1This article is part of a Special Issue entitled Lactoferrin and has undergone the Journal’s usual peer review process. Biochem Cell Biol 2012; 90:397-404. [DOI: 10.1139/o2012-004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Destruction of ceruloplasmin (Cp) in the presence of hydrogen peroxide is accompanied by the release of the protein’s copper ions that provoke formation of hydroxyl radicals (OH˙) and, consequently, further degradation of the protein. Under such conditions, degradation of Cp is hampered by a number of substances able to bind copper ions. Lactoferrin (Lf) is the most active protector of Cp, its protective effect depending on the pH of the medium. The best protection of Cp by Lf was detected at pH 7.4. In an acidic buffer (pH 5.5), Lf did not affect the destruction of Cp. The pH-dependent efficiency of copper binding by Lf is in good agreement with its capacity to protect Cp against degradation provoked by hydrogen peroxide. It seems likely that peroxide-dependent degradation of Cp stimulated by its own copper ions is a part of neutrophil-induced antimicrobial reactions and may take place properly at the foci of inflammation. Interaction of Lf with Cp may regulate the generation of OH˙ from hydrogen peroxide in the foci of inflammation and protect the adjacent tissues.
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Affiliation(s)
- Alexey V. Sokolov
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
- Research Institute of Physico-Chemical Medicine, Malaya Pirogovskaya str, 1a, Moscow 119992, Russia
| | - Kirill V. Solovyov
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
| | - Valeria A. Kostevich
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
- Research Institute of Physico-Chemical Medicine, Malaya Pirogovskaya str, 1a, Moscow 119992, Russia
| | - Andrey V. Chekanov
- Research Institute of Physico-Chemical Medicine, Malaya Pirogovskaya str, 1a, Moscow 119992, Russia
| | - Maria O. Pulina
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
| | - Elena T. Zakharova
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
| | - Mikhail M. Shavlovski
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
| | - Oleg M. Panasenko
- Research Institute of Physico-Chemical Medicine, Malaya Pirogovskaya str, 1a, Moscow 119992, Russia
| | - Vadim B. Vasilyev
- Institute for Experimental Medicine, N-W Branch of the Russian Academy of Medical Sciences, 197376 Saint-Petersburg, Acad. Pavlov street 12, Russia
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