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Wojtyła S, Śpiewak K, Baran T. Synthesis, characterization and activity of doped graphitic carbon nitride materials towards photocatalytic oxidation of volatile organic pollutants emitted from 3D printer. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112355] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Śpiewak K, Świątek S, Jachimska B, Brindell M. Induction of transferrin aggregation by indazolium [tetrachlorobis(1 H-indazole)ruthenate( iii)] (KP1019) and its biological function. NEW J CHEM 2019. [DOI: 10.1039/c9nj01342c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pre-incubation ofKP1019with transferrin leads to the formation of adducts/aggregates, which inhibit the cytotoxic properties ofKP1019.
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Affiliation(s)
- Klaudyna Śpiewak
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Jagiellonian University
- 30-387 Krakow
- Poland
| | - Sylwia Świątek
- Jerzy Haber Institute of Catalysis and Surface Chemistry
- Polish Academy of Sciences
- 30-239 Krakow
- Poland
| | - Barbara Jachimska
- Jerzy Haber Institute of Catalysis and Surface Chemistry
- Polish Academy of Sciences
- 30-239 Krakow
- Poland
| | - Małgorzata Brindell
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Jagiellonian University
- 30-387 Krakow
- Poland
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Śpiewak K, Majka G, Pilarczyk- Żurek M, Nowak PM, Woźniakiewicz M, Pietrzyk P, Korzeniak T, Stochel-Gaudyn A, Fyderek K, Strus M, Brindell M. Mn 3+ -saturated bovine lactoferrin as a new complex with potential prebiotic activities for dysbiosis treatment and prevention – On the synthesis, chemical characterization and origin of biological activity. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.09.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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Nowak PM, Śpiewak K, Woźniakiewicz M, Kościelniak P. Minimizing the impact of Joule heating as a prerequisite for the reliable analysis of metal‐protein complexes by capillary electrophoresis. J Chromatogr A 2017; 1495:83-87. [DOI: 10.1016/j.chroma.2017.03.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 11/29/2022]
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Oszajca M, Brindell M, Orzeł Ł, Dąbrowski JM, Śpiewak K, Łabuz P, Pacia M, Stochel-Gaudyn A, Macyk W, van Eldik R, Stochel G. Mechanistic studies on versatile metal-assisted hydrogen peroxide activation processes for biomedical and environmental incentives. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.05.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Majka G, Więcek G, Śróttek M, Śpiewak K, Brindell M, Koziel J, Marcinkiewicz J, Strus M. The impact of lactoferrin with different levels of metal saturation on the intestinal epithelial barrier function and mucosal inflammation. Biometals 2016; 29:1019-1033. [PMID: 27757565 PMCID: PMC5116316 DOI: 10.1007/s10534-016-9973-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/15/2016] [Indexed: 01/28/2023]
Abstract
Translocation of bacteria, primarily Gram-negative pathogenic flora, from the intestinal lumen into the circulatory system leads to sepsis. In newborns, and especially very low birth weight infants, sepsis is a major cause of morbidity and mortality. The results of recently conducted clinical trials suggest that lactoferrin, an iron-binding protein that is abundant in mammalian colostrum and milk, may be an effective agent in preventing sepsis in newborns. However, despite numerous basic studies on lactoferrin, very little is known about how metal saturation of this protein affects a host’s health. Therefore, the main objective of this study was to elucidate how iron-depleted, iron-saturated, and manganese-saturated forms of lactoferrin regulate intestinal barrier function via interactions with epithelial cells and macrophages. For these studies, a human intestinal epithelial cell line, Caco-2, was used. In this model, none of the tested lactoferrin forms induced higher levels of apoptosis or necrosis. There was also no change in the production of tight junction proteins regardless of lactoferrin metal saturation status. None of the tested forms induced a pro-inflammatory response in Caco-2 cells or in macrophages either. However, the various lactoferrin forms did effectively inhibit the pro-inflammatory response in macrophages that were activated with lipopolysaccharide with the most potent effect observed for apolactoferrin. Lactoferrin that was not bound to its cognate receptor was able to bind and neutralize lipopolysaccharide. Lactoferrin was also able to neutralize microbial-derived antigens, thereby potentially reducing their pro-inflammatory effect. Therefore, we hypothesize that lactoferrin supplementation is a relevant strategy for preventing sepsis.
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Affiliation(s)
- Grzegorz Majka
- Chair of Microbiology, Jagiellonian University Medical College, Czysta 18, 31-121, Kraków, Poland
- Chair of Immunology, Jagiellonian University Medical College, Czysta 18, 31-121, Kraków, Poland
| | - Grażyna Więcek
- Chair of Microbiology, Jagiellonian University Medical College, Czysta 18, 31-121, Kraków, Poland
| | - Małgorzata Śróttek
- Chair of Immunology, Jagiellonian University Medical College, Czysta 18, 31-121, Kraków, Poland
| | - Klaudyna Śpiewak
- Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland
| | - Małgorzata Brindell
- Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland
| | - Joanna Koziel
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland
| | - Janusz Marcinkiewicz
- Chair of Immunology, Jagiellonian University Medical College, Czysta 18, 31-121, Kraków, Poland
| | - Magdalena Strus
- Chair of Microbiology, Jagiellonian University Medical College, Czysta 18, 31-121, Kraków, Poland.
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Chilton CH, Crowther GS, Śpiewak K, Brindell M, Singh G, Wilcox MH, Monaghan TM. Potential of lactoferrin to prevent antibiotic-induced Clostridium difficile infection. J Antimicrob Chemother 2016; 71:975-85. [PMID: 26759363 PMCID: PMC4790624 DOI: 10.1093/jac/dkv452] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Accepted: 11/24/2015] [Indexed: 12/15/2022] Open
Abstract
Objectives Clostridium difficile infection (CDI) is a global healthcare problem. Recent evidence suggests that the availability of iron may be important for C. difficile growth. This study evaluated the comparative effects of iron-depleted (1% Fe3+ saturated) bovine apo-lactoferrin (apo-bLf) and iron-saturated (85% Fe3+ saturated) bovine holo-lactoferrin (holo-bLf) in a human in vitro gut model that simulates CDI. Methods Two parallel triple-stage chemostat gut models were inoculated with pooled human faeces and spiked with C. difficile spores (strain 027 210, PCR ribotype 027). Holo- or apo-bLf was instilled (5 mg/mL, once daily) for 35 days. After 7 days, clindamycin was instilled (33.9 mg/L, four times daily) to induce simulated CDI. Indigenous microflora populations, C. difficile total counts and spores, cytotoxin titres, short chain fatty acid concentrations, biometal concentrations, lactoferrin concentration and iron content of lactoferrin were monitored daily. Results In the apo-bLf model, germination of C. difficile spores occurred 6 days post instillation of clindamycin, followed by rapid vegetative cell proliferation and detectable toxin production. By contrast, in the holo-bLf model, only a modest vegetative cell population was observed until 16 days post antibiotic administration. Notably, no toxin was detected in this model. In separate batch culture experiments, holo-bLf prevented C. difficile vegetative cell growth and toxin production, whereas apo-bLf and iron alone did not. Conclusions Holo-bLf, but not apo-bLf, delayed C. difficile growth and prevented toxin production in a human gut model of CDI. This inhibitory effect may be iron independent. These observations suggest that bLf in its iron-saturated state could be used as a novel preventative or treatment strategy for CDI.
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Affiliation(s)
- C H Chilton
- Leeds Institute for Molecular Medicine, University of Leeds, Leeds, UK
| | - G S Crowther
- Leeds Institute for Molecular Medicine, University of Leeds, Leeds, UK
| | - K Śpiewak
- Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
| | - M Brindell
- Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
| | - G Singh
- NIHR Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and The University of Nottingham, Nottingham, UK
| | - M H Wilcox
- Leeds Institute for Molecular Medicine, University of Leeds, Leeds, UK
| | - T M Monaghan
- NIHR Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and The University of Nottingham, Nottingham, UK
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Affiliation(s)
- K. Śpiewak
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
| | - G. Stochel
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
| | - M. Brindell
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
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Śpiewak K, Brindell M. Impact of low- and high-molecular-mass components of human serum on NAMI-A binding to transferrin. J Biol Inorg Chem 2015; 20:695-703. [PMID: 25792379 PMCID: PMC4436686 DOI: 10.1007/s00775-015-1255-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 02/26/2015] [Indexed: 11/30/2022]
Abstract
Imidazolium trans-tetrachloridodimethylsulfoxideimidazolruthenate(III), NAMI-A, a novel antimetastatic ruthenium complex was investigated towards affinity to transferrin (Tf), whether Tf–Ru adducts might be formed after its intravenous injection. Studies were focused on the holotransferrin due to its preferential binding to transferrin receptor. Here, we showed that holotransferrin is able to bind NAMI-A as readily as apotransferrin. The simulation of biological conditions of human serum performed by application of simplified serum models allowed to analyse ruthenium distribution between transferrin and albumin. The presence of physiological concentration of albumin (ca. 18-fold excess over Tf) resulted in a twofold decrease of ruthenium binding to Tf. Interestingly, the introducing of low-molecular-mass components of serum dramatically increased the ruthenation of Tf. Intermolecular competition binding studies between transferrin and albumin showed that both proteins bound similar amount of ruthenium species. Investigation of NAMI-A binding to Tf in human serum showed that this protein was not the major binding partner for Ru complex. However, in spite of many competing proteins still the ruthenation of Tf was observed. The lack of free Ru species (protein unbounded) after incubation with human serum allowed to make an assumption of high affinity of NAMI-A towards serum proteins.
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Affiliation(s)
- K Śpiewak
- Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland
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Nowak P, Śpiewak K, Nowak J, Brindell M, Woźniakiewicz M, Stochel G, Kościelniak P. Selective separation of ferric and non-ferric forms of human transferrin by capillary micellar electrokinetic chromatography. J Chromatogr A 2014; 1341:73-8. [PMID: 24690308 DOI: 10.1016/j.chroma.2014.03.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/09/2014] [Accepted: 03/11/2014] [Indexed: 11/18/2022]
Abstract
The previously published method allowing the separation of non-ferric (iron-free) and ferric (iron-saturated) forms of human serum transferrin via capillary electrophoresis has been further developed. Using a surface response methodology and a three-factorial Doehlert design we have established a new optimized running buffer composition: 50mM Tris-HCl, pH 8.5, 22.5% (v/v) methanol, 17.5mM SDS. As a result, two previously unobserved monoferric forms of protein have been separated and identified, moreover, the loss of ferric ions from transferrin during electrophoretic separation has been considerably reduced by methanol, and the method selectivity has been yet increased resulting in a total separation of proteins exerting only subtle or none difference in mass-to-charge ratio. The new method has allowed us to monitor the gradual iron saturation of transferrin by mixing the iron-free form of protein with the buffers with different concentrations of ferric ions. It revealed continuously changing contribution of monoferric forms, characterized by different affinities of two existing iron binding sites on N- and C-lobes of protein, respectively. Afterwards, the similar experiment has been conducted on-line, i.e. inside the capillary, comparing the effectiveness of two possible modes of the reactant zones mixing: diffusion mediated and electrophoretically mediated ones. Finally, the total time of separation has been decreased down to 4min, taking the advantage from a short-end injection strategy and maintaining excellent selectivity.
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Affiliation(s)
- Paweł Nowak
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Analytical Chemistry, Kraków, Poland
| | - Klaudyna Śpiewak
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Inorganic Chemistry, Kraków, Poland
| | - Julia Nowak
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Analytical Chemistry, Kraków, Poland
| | - Małgorzata Brindell
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Inorganic Chemistry, Kraków, Poland
| | - Michał Woźniakiewicz
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Analytical Chemistry, Kraków, Poland.
| | - Grażyna Stochel
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Inorganic Chemistry, Kraków, Poland
| | - Paweł Kościelniak
- Jagiellonian University in Kraków, Faculty of Chemistry, Department of Analytical Chemistry, Kraków, Poland
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Nowak P, Śpiewak K, Brindell M, Woźniakiewicz M, Stochel G, Kościelniak P. Separation of iron-free and iron-saturated forms of transferrin and lactoferrin via capillary electrophoresis performed in fused-silica and neutral capillaries. J Chromatogr A 2013; 1321:127-32. [PMID: 24231263 DOI: 10.1016/j.chroma.2013.10.073] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 10/21/2013] [Accepted: 10/23/2013] [Indexed: 10/26/2022]
Abstract
A capillary electrophoresis-based method for the cost-effective and high efficient separation of iron-free and iron-saturated forms of two members of transferrin family: transferrin and lactoferrin has been developed. The proposed qualitative method relying on the SDS application allowed us to separate iron-free and iron-saturated forms of these proteins, as well as human serum albumin, used as an internal standard. Owing to the distinct migration times under established conditions, the combination of transferrin and lactoferrin assays within a single analytical procedure was feasible. The performance of the method using a fused-silica capillary has been compared with the results obtained using the same method but performed with the use of a neutral capillary of the same dimensions. Neutral capillary has been used as an alternative, since the comparable resolution has been achieved with a concomitant reduction of the electroosmotic flow. Despite of this fact, the migration of analytes occurred with similar velocity but in opposite order, due to the reverse polarity application. A quantitative method employing fused-silica capillary for iron saturation study has been also developed, to evaluate the iron saturation in commercial preparations of lactoferrin.
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Affiliation(s)
- Paweł Nowak
- Jagiellonian University, Faculty of Chemistry, Department of Analytical Chemistry, Kraków, Poland
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Majka G, Śpiewak K, Kurpiewska K, Heczko P, Stochel G, Strus M, Brindell M. A high-throughput method for the quantification of iron saturation in lactoferrin preparations. Anal Bioanal Chem 2013; 405:5191-200. [PMID: 23604471 PMCID: PMC3656221 DOI: 10.1007/s00216-013-6943-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 03/14/2013] [Accepted: 03/25/2013] [Indexed: 11/29/2022]
Abstract
Lactoferrin is considered as a part of the innate immune system that plays a crucial role in preventing bacterial growth, mostly via an iron sequestration mechanism. Recent data show that bovine lactoferrin prevents late-onset sepsis in preterm very low birth weight neonates by serving as an iron chelator for some bacterial strains; thus, it is very important to control the iron saturation level during diet supplementation. An accurate estimation of lactoferrin iron saturation is essential not only because of its clinical applications but also for a wide range of biochemical experiments. A comprehensive method for the quantification of iron saturation in lactoferrin preparations was developed to obtain a calibration curve enabling the determination of iron saturation levels relying exclusively on the defined ratio of absorbances at 280 and 466 nm (A280/466). To achieve this goal, selected techniques such as spectrophotometry, ELISA, and ICP-MS were combined. The ability to obtain samples of lactoferrin with determination of its iron content in a simple and fast way has been proven to be very useful. Furthermore, a similar approach could easily be implemented to facilitate the determination of iron saturation level for other metalloproteins in which metal binding results in the appearance of a distinct band in the visible part of the spectrum.
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Affiliation(s)
- Grzegorz Majka
- Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
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Abstract
ABSTRACT
Lactoferrin (Lf) - member of the transferrin family of proteins responsible for many different functions in the body of mammals participates in regulation of free iron level in the body fluids making the protein bacteriostatic.
The main goal of studies was to test the suitability of molecular dynamic simulation to study structural changes in the tertiary structure of lactoferrin.
According to ConSurf Server analysis one of the most conservative amino acids was found not only in iron- but also in carbohydrates- binding pockets which may suggest a significant impact of carbohydrates on the functions performed by lactoferrin. Pocket-Finder program applied to find iron-binding pockets revealed the potential Fe binding area. The stability of the ligand deprived protein was verified performing the 50 ns dynamic simulation using the Gromacs program. The tertiary structure changes during the simulation were observed in N-lob solely. No structural changes were observed in C-lob iron-binding pocket.
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Affiliation(s)
- Damian Marchewka
- Department of Bioinformatics and Telemedicine, Jagiellonian University – Medical College, Lazarza 16, 31-530 Krakow, PL
- Faculty of Physics, Astronomy and Applied Computer Science – Jagiellonian University, Reymonta 4, 30-059 Krakow, PL
| | - Irena Roterman
- Department of Bioinformatics and Telemedicine, Jagiellonian University – Medical College, Lazarza 16, 31-530 Krakow, PL
| | - Magdalena Strus
- Chair of Microbiology, Jagiellonian University – Medical College, Czysta 18, 31-121 Krakow, PL
| | - Klaudyna Śpiewak
- Chair of Microbiology, Jagiellonian University – Medical College, Czysta 18, 31-121 Krakow, PL
| | - Grzegorz Majka
- Chair of Microbiology, Jagiellonian University – Medical College, Czysta 18, 31-121 Krakow, PL
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