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Gyebrovszki B, Ács A, Szabó D, Auer F, Novozánszki S, Rojkovich B, Magyar A, Hudecz F, Vékey K, Drahos L, Sármay G. The Role of IgG Fc Region N-Glycosylation in the Pathomechanism of Rheumatoid Arthritis. Int J Mol Sci 2022; 23:ijms23105828. [PMID: 35628640 PMCID: PMC9146365 DOI: 10.3390/ijms23105828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/06/2022] [Revised: 05/18/2022] [Accepted: 05/20/2022] [Indexed: 11/30/2022] Open
Abstract
Anti-citrullinated protein antibodies (ACPAs) are involved in the pathogenesis of rheumatoid arthritis. N-glycosylation pattern of ACPA-IgG and healthy IgG Fc differs. The aim of this study is to determine the relative sialylation and galactosylation level of ACPAs and control IgG to assess their capability of inducing TNFα production, and furthermore, to analyze the correlations between the composition of Fc glycans and inflammatory markers in RA. We isolated IgG from sera of healthy volunteers and RA patients, and purified ACPAs on a citrulline-peptide column. Immunocomplexes (IC) were formed by adding an F(ab)2 fragment of anti-human IgG. U937 cells were used to monitor the binding of IC to FcγR and to trigger TNFα release determined by ELISA. To analyze glycan profiles, control IgG and ACPA-IgG were digested with trypsin and the glycosylation patterns of glycopeptides were analyzed by determining site-specific N-glycosylation using nano-UHPLC-MS/MS. We found that both sialylation and galactosylation levels of ACPA-IgG negatively correlate with inflammation-related parameters such as CRP, ESR, and RF. Functional assays show that dimerized ACPA-IgG significantly enhances TNFα release in an FcγRI-dependent manner, whereas healthy IgG does not. TNFα production inversely correlates with the relative intensities of the G0 glycoform, which lacks galactose and terminal sialic acid moieties.
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Affiliation(s)
- Balázs Gyebrovszki
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (B.G.); (F.A.); (S.N.)
| | - András Ács
- MS Proteomics Research Group, Research Centre for Natural Sciences, Eötvös Loránd Research Network, 1117 Budapest, Hungary; (A.Á.); (D.S.); (K.V.); (L.D.)
| | - Dániel Szabó
- MS Proteomics Research Group, Research Centre for Natural Sciences, Eötvös Loránd Research Network, 1117 Budapest, Hungary; (A.Á.); (D.S.); (K.V.); (L.D.)
- Hevesy György PhD School of Chemistry, Faculty of Science, Eötvös Loránd University, 1117 Budapest, Hungary
| | - Felícia Auer
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (B.G.); (F.A.); (S.N.)
- Translational Glycomics Research Group, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, 8200 Veszprém, Hungary
| | - Soma Novozánszki
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (B.G.); (F.A.); (S.N.)
- Central Laboratory-Microbiology Profile, Molecular Department, National Institute of Hematology and Infectious Diseases, Central Hospital of Southern Pest, 1097 Budapest, Hungary
| | - Bernadette Rojkovich
- Rheumatology Department III, Polyclinic of the Hospitaller Brothers of St. John of God, 1027 Budapest, Hungary;
| | - Anna Magyar
- ELKH-ELTE Research Group of Peptide Chemistry, 1117 Budapest, Hungary; (A.M.); (F.H.)
| | - Ferenc Hudecz
- ELKH-ELTE Research Group of Peptide Chemistry, 1117 Budapest, Hungary; (A.M.); (F.H.)
| | - Károly Vékey
- MS Proteomics Research Group, Research Centre for Natural Sciences, Eötvös Loránd Research Network, 1117 Budapest, Hungary; (A.Á.); (D.S.); (K.V.); (L.D.)
| | - László Drahos
- MS Proteomics Research Group, Research Centre for Natural Sciences, Eötvös Loránd Research Network, 1117 Budapest, Hungary; (A.Á.); (D.S.); (K.V.); (L.D.)
| | - Gabriella Sármay
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (B.G.); (F.A.); (S.N.)
- Correspondence:
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Szabó I, Illien F, Dókus LE, Yousef M, Baranyai Z, Bősze S, Ise S, Kawano K, Sagan S, Futaki S, Hudecz F, Bánóczi Z. Influence of the Dabcyl group on the cellular uptake of cationic peptides: short oligoarginines as efficient cell-penetrating peptides. Amino Acids 2021; 53:1033-1049. [PMID: 34032919 PMCID: PMC8241751 DOI: 10.1007/s00726-021-03003-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/11/2021] [Indexed: 12/25/2022]
Abstract
Cell-penetrating peptides (CPPs) are promising delivery vehicles. These short peptides can transport wide range of cargos into cells, although their usage has often limitations. One of them is the endosomatic internalisation and thus the vesicular entrapment. Modifications which increases the direct delivery into the cytosol is highly researched area. Among the oligoarginines the longer ones (n > 6) show efficient internalisation and they are well-known members of CPPs. Herein, we describe the modification of tetra- and hexaarginine with (4-((4-(dimethylamino)phenyl)azo)benzoyl) (Dabcyl) group. This chromophore, which is often used in FRET system increased the internalisation of both peptides, and its effect was more outstanding in case of hexaarginine. The modified hexaarginine may enter into cells more effectively than octaarginine, and showed diffuse distribution besides vesicular transport already at low concentration. The attachment of Dabcyl group not only increases the cellular uptake of the cell-penetrating peptides but it may affect the mechanism of their internalisation. Their conjugates with antitumor drugs were studied on different cells and showed antitumor activity.
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Affiliation(s)
- Ildikó Szabó
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd Research Network (ELKH), Eötvös L. University, Budapest, Hungary
| | - Françoise Illien
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des biomolécules, LBM, 75005, Paris, France
| | - Levente E Dókus
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd Research Network (ELKH), Eötvös L. University, Budapest, Hungary
| | - Mo'ath Yousef
- Department of Organic Chemistry, Eötvös L. University, Pázmány P. Setany 1/A, Budapest, 1117, Hungary
| | - Zsuzsa Baranyai
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd Research Network (ELKH), Eötvös L. University, Budapest, Hungary
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd Research Network (ELKH), Eötvös L. University, Budapest, Hungary
| | - Shoko Ise
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011, Japan
| | - Kenichi Kawano
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011, Japan
| | - Sandrine Sagan
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des biomolécules, LBM, 75005, Paris, France
| | - Shiroh Futaki
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011, Japan
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd Research Network (ELKH), Eötvös L. University, Budapest, Hungary
- Department of Organic Chemistry, Eötvös L. University, Pázmány P. Setany 1/A, Budapest, 1117, Hungary
| | - Zoltán Bánóczi
- Department of Organic Chemistry, Eötvös L. University, Pázmány P. Setany 1/A, Budapest, 1117, Hungary.
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Visone V, Szabó I, Perugino G, Hudecz F, Bánóczi Z, Valenti A. Topoisomerases inhibition and DNA binding mode of daunomycin-oligoarginine conjugate. J Enzyme Inhib Med Chem 2021; 35:1363-1371. [PMID: 32552137 PMCID: PMC7717705 DOI: 10.1080/14756366.2020.1780226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Cancer is a major health issue adsorbing the attention of a biomedical research. To fight this disease, new drugs are developed, specifically tailored to target biological pathways or peculiar components of the tumour cells. Particularly interesting is the use of intercalating agents as drugs capable to bind DNA and inhibit enzymes involved in DNA metabolism. Anthracyclines are the most commonly used anticancer drugs. In particular, daunomycin is used to cancer treatment by exploiting its ability to intercalate DNA and inhibit the activity of DNA topoisomerases implicated in the replication processes. Unfortunately, clinical application of anthracyclines is limited by their side effects. The conjugation with specific carriers could affect the selectivity and reduce side effect by improving stability and/or cellular uptake properties. We here report the biochemical characterisation of a daunomycin oligopeptide conjugate containing six residues of arginine, by the analysis of its fluorescence properties, DNA interaction and topoisomerases inhibitory effects.
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Affiliation(s)
- Valeria Visone
- Institute of Biosciences and BioResources, National Research Council of Italy, Naples, Italy
| | - Ildikó Szabó
- MTA-ELTE Research Group of Peptide Chemistry, Budapest, Hungary
| | - Giuseppe Perugino
- Institute of Biosciences and BioResources, National Research Council of Italy, Naples, Italy
| | - Ferenc Hudecz
- Department of Organic Chemistry, Eötvös Loránd University (ELTE), Budapest, Hungary
| | - Zoltán Bánóczi
- Department of Organic Chemistry, Eötvös Loránd University (ELTE), Budapest, Hungary
| | - Anna Valenti
- Institute of Biosciences and BioResources, National Research Council of Italy, Naples, Italy
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Uray K, Pimm MV, Hudecz F. The effect of the branched chain polypeptide carrier on biodistribution of covalently attached B-cell epitope peptide (APDTRPAPG) derived from mucin 1 glycoprotein. Arch Biochem Biophys 2019; 664:127-133. [DOI: 10.1016/j.abb.2019.02.003] [Citation(s) in RCA: 3] [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: 08/23/2018] [Revised: 01/28/2019] [Accepted: 02/06/2019] [Indexed: 12/16/2022]
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Ricci F, Carrassa L, Christodoulou MS, Passarella D, Michel B, Benhida R, Martinet N, Hunyadi A, Ioannou E, Roussis V, Musso L, Dallavalle S, Silvestri R, Westwood N, Mori M, Ingallina C, Botta B, Kavetsou E, Detsi A, Majer Z, Hudecz F, Bosze S, Kaminska B, Hansen TV, Bertrand P, Athanassopoulos CM, Damia G. A High-throughput Screening of a Chemical Compound Library in Ovarian Cancer Stem Cells. Comb Chem High Throughput Screen 2019; 21:50-56. [PMID: 29366408 DOI: 10.2174/1386207321666180124093406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 05/17/2017] [Revised: 10/16/2017] [Accepted: 12/18/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Epithelial ovarian cancer has a poor prognosis, mostly due to its late diagnosis and the development of drug resistance after a first platinum-based regimen. The presence of a specific population of "cancer stem cells" could be responsible of the relapse of the tumor and the development of resistance to therapy. For this reason, it would be important to specifically target this subpopulation of tumor cells in order to increase the response to therapy. METHOD We screened a chemical compound library assembled during the COST CM1106 action to search for compound classes active in targeting ovarian stem cells. We here report the results of the high-throughput screening assay in two ovarian cancer stem cells and the differentiated cells derived from them. RESULTS AND CONCLUSION Interestingly, there were compounds active only on stem cells, only on differentiated cells, and compounds active on both cell populations. Even if these data need to be validated in ad hoc dose response cytotoxic experiments, the ongoing analysis of the compound structures will open up to mechanistic drug studies to select compounds able to improve the prognosis of ovarian cancer patients.
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Affiliation(s)
- F Ricci
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
| | - L Carrassa
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
| | - M S Christodoulou
- Dipartimento di Chimica - Universita degli Studi di Milano - Via C. Golgi 19, 20133 Milan, Italy
| | - D Passarella
- Dipartimento di Chimica - Universita degli Studi di Milano - Via C. Golgi 19, 20133 Milan, Italy
| | - B Michel
- Universite Cote d'Azur, CNRS, Institut de Chimie de Nice UMR 7272, 06108 Nice, France
| | - R Benhida
- Universite Cote d'Azur, CNRS, Institut de Chimie de Nice UMR 7272, 06108 Nice, France
| | - N Martinet
- Universite Cote d'Azur, CNRS, Institut de Chimie de Nice UMR 7272, 06108 Nice, France
| | - A Hunyadi
- Institute of Pharmacognosy, University of Szeged, Eotvos str. 6, 6720 Szeged, Hungary and Interdisciplinary Centre for Natural Products, University of Szeged, Eotvos str. 6, 6720 Szeged, Hungary
| | - E Ioannou
- Department of Pharmacy, Section of Pharmacognosy and Chemistry of Natural Products, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
| | - V Roussis
- Department of Pharmacy, Section of Pharmacognosy and Chemistry of Natural Products, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
| | - L Musso
- Department of Food, Environmental and Nutritional Sciences, Universita degli Studi di Milano,Via Celoria 2, 20133 Milan, Italy
| | - S Dallavalle
- Department of Food, Environmental and Nutritional Sciences, Universita degli Studi di Milano,Via Celoria 2, 20133 Milan, Italy
| | - R Silvestri
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza University of Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - N Westwood
- School of Chemistry and Biomedical Sciences ResearchComplex, University of St Andrews and EaStCHEM, St Andrews KY16, United Kingdom
| | - M Mori
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, viale Regina Elena 291, 00161 Rome, Italy
| | - C Ingallina
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza University of Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - B Botta
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza University of Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - E Kavetsou
- Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens Iroon Politechniou 9, Zografou Campus, 15780 Athens, Greece
| | - A Detsi
- Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens Iroon Politechniou 9, Zografou Campus, 15780 Athens, Greece
| | - Z Majer
- Department of Organic Chemistry, Eotvos Lorand University, H-1117 Budapest, Hungary
| | - F Hudecz
- Department of Organic Chemistry, Eotvos Lorand University, H-1117 Budapest, Hungary
| | - S Bosze
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eotvos Lorand University, H-1117 Budapest, Hungary
| | - B Kaminska
- Nencki Institute of Experimental Biology of Polish Acdemy of Sciences, Laboratory of Molecular Neurobiology, Neurobiology Center, 02-093 Warsaw, Pasteur 3 str, Poland
| | - T V Hansen
- School of Pharmacy, Department of Pharmaceutical Chemistry, University of Oslo, N-0316 Oslo, Norway
| | - P Bertrand
- Institut de Chimie des Milieux et Materiaux de Poitiers, UMR CNRS 7285, 86000, Poitiers, France
| | | | - G Damia
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
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Cornillet M, Babos F, Magyar A, Sebbag M, Verrouil E, Hudecz F, Serre G, Nogueira L. Seropositivity and Antibody Profiling of Patients Are Dramatically Impacted by the Features of Peptides Used as Immunosorbents: A Lesson from Anti–Citrullinated Protein/Peptide Antibody. J I 2018; 201:3211-3217. [DOI: 10.4049/jimmunol.1800330] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 09/23/2018] [Indexed: 01/09/2023]
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Bánóczi Z, Keglevich A, Szabó I, Ranđelović I, Hegedüs Z, Regenbach FL, Keglevich P, Lengyel Z, Gorka-Kereskényi Á, Dubrovay Z, Háda V, Szigetvári Á, Szántay C, Hazai L, Tóvári J, Hudecz F. The effect of conjugation on antitumor activity of vindoline derivatives with octaarginine, a cell-penetrating peptide. J Pept Sci 2018; 24:e3118. [PMID: 30084214 DOI: 10.1002/psc.3118] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 05/09/2018] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 12/19/2022]
Abstract
Some Vinca alkaloids (eg, vinblastine, vincristine) have been widely used as antitumor drugs for a long time. Unfortunately, vindoline, a main alkaloid component of Catharanthus roseus (L.) G. Don, itself, has no antitumor activity. In our novel research program, we have prepared and identified new vindoline derivatives with moderate cytostatic activity. Here, we describe the effect of conjugation of vindoline derivative with oligoarginine (tetra-, hexa-, or octapeptides) cell-penetrating peptides on the cytostatic activity in vitro and in vivo. Br-Vindoline-(l)-Trp-OH attached to the N-terminus of octaarginine was the most effective compound in vitro on HL-60 cell line. Analysis of the in vitro activity of two isomer conjugates (Br-vindoline-(l)-Trp-Arg8 and Br-vindoline-(d)-Trp-Arg8 suggests the covalent attachment of the vindoline derivatives to octaarginine increased the antitumor activity significantly against P388 and C26 tumour cells in vitro. The cytostatic effect was dependent on the presence and configuration of Trp in the conjugate as well as on the cell line studied. The configuration of Trp notably influenced the activity on C26 and P388 cells: conjugate with (l)-Trp was more active than conjugate with the (d)-isomer. In contrast, conjugates had very similar effect on both the HL-60 and MDA-MB-231 cells. In preliminary experiments, conjugate Br-vindoline-(l)-Trp-Arg8 exhibited some inhibitory effect on the tumor growth in P388 mouse leukemia tumor-bearing mice. Our results indicate that the conjugation of modified vindoline could result in an effective compound even with in vivo antitumor activity.
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Affiliation(s)
- Zoltán Bánóczi
- Department of Organic Chemistry, Eötvös Loránd University, Budapest, Hungary
| | - András Keglevich
- Department of Organic Chemistry and Technology, University of Technology and Economics, H-1111, Budapest, Gellért tér 4, Hungary
| | - Ildikó Szabó
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd University, Budapest, Hungary
| | - Ivan Ranđelović
- Department of Experimental Pharmacology, National Institute of Oncology, Budapest, Hungary
| | - Zita Hegedüs
- Department of Experimental Pharmacology, National Institute of Oncology, Budapest, Hungary
| | - Fruzsina L Regenbach
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd University, Budapest, Hungary
| | - Péter Keglevich
- Department of Organic Chemistry and Technology, University of Technology and Economics, H-1111, Budapest, Gellért tér 4, Hungary
| | - Zsófia Lengyel
- Department of Organic Chemistry and Technology, University of Technology and Economics, H-1111, Budapest, Gellért tér 4, Hungary
| | - Álmos Gorka-Kereskényi
- Department of Organic Chemistry and Technology, University of Technology and Economics, H-1111, Budapest, Gellért tér 4, Hungary
| | - Zsófia Dubrovay
- Spectroscopic Research Department, Gedeon Richter Plc, 10, PO Box 27, H-1475, Budapest, Hungary
| | - Viktor Háda
- Spectroscopic Research Department, Gedeon Richter Plc, 10, PO Box 27, H-1475, Budapest, Hungary
| | - Áron Szigetvári
- Spectroscopic Research Department, Gedeon Richter Plc, 10, PO Box 27, H-1475, Budapest, Hungary
| | - Csaba Szántay
- Spectroscopic Research Department, Gedeon Richter Plc, 10, PO Box 27, H-1475, Budapest, Hungary
| | - László Hazai
- Department of Organic Chemistry and Technology, University of Technology and Economics, H-1111, Budapest, Gellért tér 4, Hungary
| | - József Tóvári
- Department of Experimental Pharmacology, National Institute of Oncology, Budapest, Hungary
| | - Ferenc Hudecz
- Department of Organic Chemistry, Eötvös Loránd University, Budapest, Hungary.,MTA-ELTE Research Group of Peptide Chemistry, Eötvös Loránd University, Budapest, Hungary
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Steckel A, Uray K, Turiák L, Gömöry Á, Drahos L, Hudecz F, Schlosser G. Mapping the tandem mass spectrometric characteristics of citrulline-containing peptides. Rapid Commun Mass Spectrom 2018; 32:844-850. [PMID: 29575159 DOI: 10.1002/rcm.8105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/28/2018] [Accepted: 03/04/2018] [Indexed: 05/20/2023]
Abstract
RATIONALE Protein citrullination (deimination) is a post-translational modification of proteins converting arginine(s) into citrulline(s). "Overcitrullination" could be associated with severe pathological conditions. Mass spectrometric analysis of modified proteins is hindered by several problems. A comprehensive study of the fragmentation of deiminated peptides is not yet available. In this paper we have made an attempt to describe the characteristics of these processes, based on the studies of epitope model oligopeptides derived from clinically relevant proteins. METHODS Solutions of purified model peptides containing either one or two citrulline residues as well as their native variants were injected directly into the electrospray source of a high accuracy and resolution quadrupole-time-of-flight instrument and were analysed by tandem mass spectrometry using low-energy collision-induced dissociation. RESULTS Loss of isocyanic acid from citrulline residues is a preferred fragmentation route for deiminated peptides, which yields ornithine residues in the sequence. However, simultaneous detection of both the isocyanic acid loss and sequence fragments is often compromised. A preferential cleavage site was observed between citrulline and any other following amino acids yielding intensive complementary b- and y-type ions. Also, citrulline positioned at the C-termini displays a preferential cleavage N-terminal to this residue yielding characteristic y1 ions. These phenomena are described here for the first time and are referred to as the "citrulline effect". CONCLUSIONS We found that the citrulline effect is very pronounced and could be used as a complementary tool for the confirmation of modification sites in addition to losses of isocyanic acids from the protonated molecules or from fragment ions. Low collision energy applied to peptide ions having partially mobile protons reveals the site of modification by generating specific and intensive fragments of the sequence. On the other hand, fragmenting precursor ions with mobile protons usually allows full sequence coverage, although citrulline-specific fragments may exhibit lower intensities compared to other fragments.
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Affiliation(s)
- Arnold Steckel
- Doctoral School of Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Katalin Uray
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Lilla Turiák
- MS Proteomics Research Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ágnes Gömöry
- MS Proteomics Research Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - László Drahos
- MS Proteomics Research Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, ELTE Eötvös Loránd University, Budapest, Hungary
- Department of Organic Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Gitta Schlosser
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, ELTE Eötvös Loránd University, Budapest, Hungary
- Department of Analytical Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
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Szarka E, Aradi P, Huber K, Pozsgay J, Végh L, Magyar A, Gyulai G, Nagy G, Rojkovich B, Kiss É, Hudecz F, Sármay G. Affinity Purification and Comparative Biosensor Analysis of Citrulline-Peptide-Specific Antibodies in Rheumatoid Arthritis. Int J Mol Sci 2018; 19:ijms19010326. [PMID: 29361749 PMCID: PMC5796268 DOI: 10.3390/ijms19010326] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 12/30/2017] [Revised: 01/15/2018] [Accepted: 01/17/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND In rheumatoid arthritis (RA), anti-citrullinated protein/peptide antibodies (ACPAs) are responsible for disease onset and progression, however, our knowledge is limited on ligand binding affinities of autoantibodies with different citrulline-peptide specificity. METHODS Citrulline-peptide-specific ACPA IgGs were affinity purified and tested by ELISA. Binding affinities of ACPA IgGs and serum antibodies were compared by surface plasmon resonance (SPR) analysis. Bifunctional nanoparticles harboring a multi-epitope citrulline-peptide and a complement-activating peptide were used to induce selective depletion of ACPA-producing B cells. RESULTS KD values of affinity-purified ACPA IgGs varied between 10-6 and 10-8 M and inversely correlated with disease activity. Based on their cross-reaction with citrulline-peptides, we designed a novel multi-epitope peptide, containing Cit-Gly and Ala-Cit motifs in two-two copies, separated with a short, neutral spacer. This peptide detected antibodies in RA sera with 66% sensitivity and 98% specificity in ELISA and was recognized by 90% of RA sera, while none of the healthy samples in SPR. When coupled to nanoparticles, the multi-epitope peptide specifically targeted and depleted ACPA-producing B cells ex vivo. CONCLUSIONS The unique multi-epitope peptide designed based on ACPA cross-reactivity might be suitable to develop better diagnostics and novel therapies for RA.
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Affiliation(s)
- Eszter Szarka
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (E.S.); (P.A.); (K.H.); (J.P.); (L.V.)
| | - Petra Aradi
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (E.S.); (P.A.); (K.H.); (J.P.); (L.V.)
| | - Krisztina Huber
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (E.S.); (P.A.); (K.H.); (J.P.); (L.V.)
| | - Judit Pozsgay
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (E.S.); (P.A.); (K.H.); (J.P.); (L.V.)
| | - Lili Végh
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (E.S.); (P.A.); (K.H.); (J.P.); (L.V.)
| | - Anna Magyar
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Science, Eötvös Loránd University, 1117 Budapest, Hungary; (A.M.); (F.H.)
| | - Gergő Gyulai
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, 1117 Budapest, Hungary; (G.G.); (É.K.)
| | - György Nagy
- Department of Rheumatology, 3rd Department of Internal Medicine, Semmelweis University, 1125 Budapest, Hungary;
- Rheumatology, Buda Hospital of the Hospitaller Order of St. John of God, 1023 Budapest, Hungary;
| | - Bernadette Rojkovich
- Rheumatology, Buda Hospital of the Hospitaller Order of St. John of God, 1023 Budapest, Hungary;
| | - Éva Kiss
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, 1117 Budapest, Hungary; (G.G.); (É.K.)
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Science, Eötvös Loránd University, 1117 Budapest, Hungary; (A.M.); (F.H.)
| | - Gabriella Sármay
- Department of Immunology, Eötvös Loránd University, 1117 Budapest, Hungary; (E.S.); (P.A.); (K.H.); (J.P.); (L.V.)
- Correspondence: ; Tel.: +36-1-372-2500 (ext. 8662)
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10
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Szabó R, Sebestyén M, Kóczán G, Orosz Á, Mező G, Hudecz F. Cellular Uptake Mechanism of Cationic Branched Polypeptides with Poly[l-Lys] Backbone. ACS Comb Sci 2017; 19:246-254. [PMID: 28276242 DOI: 10.1021/acscombsci.6b00133] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Cationic macromolecular carriers can be effective carriers for small molecular compounds, drugs, epitopes, or nucleic acids. Polylysine-based polymeric branched polypeptides have been systematically studied on the level of cells and organisms as well. In the present study, we report our findings on the cellular uptake characteristics of nine structurally related polylysine-based polypeptides with cationic side chains composed of (i) single amino acid (poly[Lys(Xi)], XiK) or (ii) oligo[dl-alanine] (poly[Lys(dl-Alam)], AK) or (iii) oligo[dl-alanine] with an additional amino acid (X) at the terminal position (poly[Lys(Xi-dl-Alam)] (XAK)) or (iv) at the position next to the polylysine backbone (poly[Lys(dl-Alam-Xi)] (AXK)). In vitro cytotoxicity and cellular uptake were characterized on HT-29 human colon carcinoma and HepG2 human hepatocarcinoma cell lines. Data indicate that the polycationic polypeptides studied are essentially nontoxic in the concentration range studied, and their uptake is very much dependent on the side chain structure (length, identity of amino acid X, and distance between the terminal positive charges) and also on the cell lines. Our findings in uptake inhibition studies suggest that predominantly macropinocytosis and caveole/lipid raft mediated endocytosis are involved. The efficacy of their internalization is markedly influenced by the hydrophobicity and charge properties of the amino acid X. Interestingly, the uptake properties of the these polypeptides show certain similarities to the entry pathways of several cell penetrating peptides.
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Affiliation(s)
- Rita Szabó
- MTA-ELTE Research Group of Peptide Chemistry, Pázmány Péter st. 1/A, 1117 Budapest, Hungary
| | - Mónika Sebestyén
- MTA-ELTE Research Group of Peptide Chemistry, Pázmány Péter st. 1/A, 1117 Budapest, Hungary
| | - György Kóczán
- MTA-ELTE Research Group of Peptide Chemistry, Pázmány Péter st. 1/A, 1117 Budapest, Hungary
| | - Ádám Orosz
- Department
of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó
u. 37-47, 1094 Budapest, Hungary
| | - Gábor Mező
- MTA-ELTE Research Group of Peptide Chemistry, Pázmány Péter st. 1/A, 1117 Budapest, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Pázmány Péter st. 1/A, 1117 Budapest, Hungary
- Department
of Organic Chemistry, Eötvös L. University, Pázmány
Péter st. 1/A, 1117 Budapest, Hungary
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11
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Podolski-Renić A, Bősze S, Dinić J, Kocsis L, Hudecz F, Csámpai A, Pešić M. Ferrocene–cinchona hybrids with triazolyl-chalcone linkers act as pro-oxidants and sensitize human cancer cell lines to paclitaxel. Metallomics 2017; 9:1132-1141. [DOI: 10.1039/c7mt00183e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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
Epimeric ferrocene–quinidine hybrids with triazolyl-chalcone linkers act as pro-oxidative agents and autophagy modulators in paclitaxel resistant cancer cells.
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Affiliation(s)
- Ana Podolski-Renić
- Department of Neurobiology
- Institute for Biological Research “Siniša Stanković” (IBISS)
- University of Belgrade
- Belgrade
- Serbia
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry
- Eötvös Loránd University
- Budapest
- Hungary
| | - Jelena Dinić
- Department of Neurobiology
- Institute for Biological Research “Siniša Stanković” (IBISS)
- University of Belgrade
- Belgrade
- Serbia
| | - László Kocsis
- Department of Organic Chemistry
- Eötvös Loránd University (ELTE)
- Budapest
- Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry
- Eötvös Loránd University
- Budapest
- Hungary
- Department of Organic Chemistry
| | - Antal Csámpai
- Department of Inorganic Chemistry
- Eötvös Loránd University (ELTE)
- Budapest
- Hungary
| | - Milica Pešić
- Department of Neurobiology
- Institute for Biological Research “Siniša Stanković” (IBISS)
- University of Belgrade
- Belgrade
- Serbia
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12
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Sebestyén M, Kóczán G, Hudecz F. Pitfalls in the synthesis of fluorescent methotrexate oligopeptide conjugates. Amino Acids 2016; 48:2599-2604. [PMID: 27357306 DOI: 10.1007/s00726-016-2285-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 03/07/2016] [Accepted: 06/20/2016] [Indexed: 11/28/2022]
Abstract
Methotrexate (MTX) conjugates with poly[Lys(DL-Alam)] based polymeric polypeptides are efficient against Leishmania donovani parasite infection, but the mechanism of the effect is not known yet. We prepared therefore the 5(6)-carboxyfluorescein (Cf) labeled oligopeptide [Cf-K(AaAa)] (a: D-alanine, A: L-alanine) and the corresponding MTX conjugates [Cf-K(MTX-AaAa)] as model compounds for structure-activity experiments. The conjugate aimed to be synthesized with solid phase methodology on MBHA resin with Boc strategy, using Fmoc-Lys(Boc)-OH. However, various side reactions were identified. Here we report three problems observed during the synthesis as well as solutions developed by us: (1) unexpected cyclopeptide-formation with the lactone-carboxylic group of the Cf was detected, when Cf was attached to the α-amino group of the Lys residue on solid phase. This was avoided by changing the order of Cf incorporation with using Fmoc/Dde strategy. Alternatively, we have built the peptide with Fmoc strategy on solid phase first and performed the labeling with Cf-OSu subsequently in solution. (2) During HF cleavage of the protected conjugates, MTX was demonstrated to form adducts with anisole and p-cresol scavengers, and the TMSOTf cleavage methodology was also found to be inadequate due to the large number of side products formed. We report here that using Fmoc/Dde strategy is an appropriate method to circumvent the cleavage with HF or TMSOTf. (3) During the coupling of MTX with oligopeptide, structural and stereo isomers are formed. We have described here the suitable conditions of HPLC separation of these products.
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Affiliation(s)
- Mónika Sebestyén
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest 112, POB. 32, 1518, Hungary
| | - György Kóczán
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest 112, POB. 32, 1518, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest 112, POB. 32, 1518, Hungary. .,Department of Organic Chemistry, Eötvös Loránd University, Budapest 112, POB. 32, 1518, Hungary.
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13
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Abstract
Amiloride is a potent inhibitor of a urokinase type plasminogen activator which is involved in the invasive process of cancer cells leading to the initiation of metastasis. Synthesis, characterization and in vitro tests of four macromolecular conjugates of Amiloride are presented. One of them is a degradable derivative, HPMA-Gly-D,l-Phe-Leu-Gly-amiloride. In this case the in vitro release of Amiloride was monitored. Other conjugates are stable containing a new amiloride derivative, 6-aminohexyl amiloride [AHA], coupled to different polymeric carriers: a branched polypeptide, poly-[Lys(AcGlu1.0-D,l-Ala4.5)] [AcEAK], poly-[N-(2-hydroxy propyl) metacrylamide] [HPMA] and poly-[1-vinyl-2-pyrrolidone- co-maleic acid] [NVP MA]. Inhibition of uPA, plasminogen activation and proteinases secreted by cancer cells was measured as well as basement membrane degradation in vitro. Each amiloride AHA and the corresponding conjugates retained their activity in these experiments.
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Affiliation(s)
- Janos Pató
- Chemical Institute, Chemical Research Center, Pusztaszeri u. 59-67, 1525 Budapest, Hungary
| | - Karel Ulbrich
- Institute of Macromolecular Chemistry, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
| | - Vladimir Subr
- Institute of Macromolecular Chemistry, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
| | - Peter Baker
- Department of Surgery, University of Birmingham, B152THBirmingham, UK
| | - Gábor Mezö
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Pázmány P s. 2, 1518 Budapest, Hungary
| | - Ferenc Hudecz
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Pázmány P s. 2, 1518 Budapest, Hungary
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14
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Mezö G, Hudecz F, Szekerke M, Kajtár J, Sármay G, Gergely J, Nagy Z, Clegg JA. Synthesis and Characterization of p-Borono-Phenylalanine-Branched Polypeptide-Monoclonal Antibody Ternary Systems for Potential Use in Boron Neutron Capture Therapy (BNCT). J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391159601100401] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The application of the 10B ( n,α) 7Li capture reaction to cancer radiotherapy (Boron Neutron Capture Therapy) was studied to avoid the inherent disadvantages of conventional radiation therapy. p-Borono-phenylalanine (Bph) was used as the 10B source and mAb produced against HCMB melanoma cells was applied as targeting device. Since extensive direct boronation of mAb led diminished recognition of antigens, an intermediate carrier was used. Nontoxic, biocompatible, biodegradable and weakly immunogenic branched polypeptides with a polylysine backbone was used to carry a high number of 10B. Protected 10B-Bph was coupled by four different methods to polycationic branched polypeptides. The coupling efficiency varied according to the experimental conditions, with a maximum of 90%. The chiroptical properties of the conjugates indicated an ordered conformation which increased with the number of coupled Bph. The whole body survival (WBS) and tissue distribution profile of mAb (8/6 IgG2a) were markedly altered after conjugation with Bph-branched polypeptide. Decreased WBS and intermediate-carrier-dependent accumulation in the spleen, liver and kidney was observed 24 h after iv. administration. After joining only a few chains of the highly loaded Bph-AK conjugate to mAb, the binding activity of the mAb in the ternary system was preserved compared to control.
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Affiliation(s)
- Gábor Mezö
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, H-1518 Budapest 112, POB 32 Hungary
| | - Ferenc Hudecz
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, H-1518 Budapest 112, POB 32 Hungary
| | - Mária Szekerke
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, H-1518 Budapest 112, POB 32 Hungary
| | - Judit Kajtár
- Department of Organic Chemistry, Eötvös L. University, Budapest, Hungary
| | | | - János Gergely
- Department of Immunology, Eötvös L. University, Göd, Hungary
| | - Zsuzsa Nagy
- Institute of Biology, Semmelweis Medical University, Budapest, Hungary
| | - J. A. Clegg
- Cancer Research Laboratory, University of Nottingham, UK
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15
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Szabö R, Mezö G, Hudecz F, Köhidai L. Effect of the Polylysine Based Polymeric Polypeptides on the Growth and Chemotaxis of Tetrahymena Pyriformis. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391102031640] [Citation(s) in RCA: 6] [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: 11/15/2022]
Abstract
Polylysine based branched polypeptides represents a group of biocompatible polymers that could be utilized as macromolecular carriers for drugs, epitopes or reporter molecules. Ten polymers with different character (amino acid composition and charge properties) were prepared: polypeptides with single amino acid in the branches (poly[Lys(Xi)]), X = His, Pro or Glu; and polymers possessing oligo[DL-alanine] side chains only (poly[Lys(DL-Alam) (AK) or with an additional amino acid residue poly[Lys(Xi-DL-Alam)] (XAK), where X = Ser (SAK), Thr (TAK), Glu (EAK), acetyl-Glu (Ac-EAK) or succinyl-Glu (Succ-EAK). were investigated. The concentration of these compounds influence the chemotaxis and survival of eukaryotic unicellular model organism, Tetrahymena pyriformis GL. Two types of experiments were performed. First the polymer induced chemoattractant/chemorepellent response of Tetrahymena cells were tested, then chemotactic selection experiments were performed. The chemotactic responses elicited by the polymers were dependent not only on chemical properties (composition, charge and the length of the side chain) of the compounds, but also on their concentration. Based on these results, the polymers were grouped as full-chemoattractant expressing this behavior in the full concentration range investigated (HiK), full-chemorepellent (EiK and Ac-EAK) and partial chemoattractant/chemorepellent with concentration dependent activity (PiK, EAK and Succ-EAK).
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Affiliation(s)
| | - Gábor Mezö
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences Budapest, 112, P.O. Box 32, H-1518, Hungary
| | - Ferenc Hudecz
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences Budapest, 112, P.O. Box 32, H-1518, Hungary
| | - Lászlö Köhidai
- Department of Genetics, Cell and Immunobiology, Semmelweis University, H-1445, Budapest, Hungary
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16
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Nagy IB, Dancs A, Kóczán G, Mezö G, Hudecz F. Conjugation of HS-Oligopeptides with Polymeric Branched Chain Polypeptides Containing Multiple Amino Groups. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391150001500203] [Citation(s) in RCA: 6] [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: 11/15/2022]
Abstract
For the preparation of bioconjugates containing polymeric polypeptides with well-defined structure and composition, we systematically studied 3-(2-pyridyldithio)propionic acid N-hydroxy-succinimide ester (SPDP). SPDP as amino- and thiol-reactive heterobifunctional coupling agent is mainly used for protein-based conjugates, and very little data are available on its application for the modification of polymers. In this communication, we describe the effect of polymer/oligopeptide structure and of the reaction condition on the incorporation of oligopeptides with free thiol group (CAVKDEL, CTGRGDSP) into polymeric polypeptides possessing multiple amino groups. For these studies, linear poly[l-lysine] with free ε-amino groups and its XAK-type branched polypeptide derivatives {poly[Lys(Xi-dl-Ala m)]( i < 1, m∼ 3, XAK)} either with polycationic character {X = φ (AK), X = Ser (SAK)} or with amphoteric nature {X = Glu (EAK)} were utilized. First, the polymers were modified with SPDP under various conditions, and the degree of substitution was determined. We found that the efficacy of the nucleophilic substitution of NH2 groups with SPDP depended not only on the pH and the concentration of the coupling reagent but also on the polymer composition, mainly on the p K a of the branch-terminal amino group of the polymers. SPDP-modified polymeric polypeptides were reacted with the HS-oligopeptides, and the effects of polymer/oligopeptide structure as well as the reaction conditions (pH, peptide/(SSP)polymer molar ratio) on the composition of the product were evaluated. The results suggest that acidic pH is more favorable for the thiol-disulphide exchange, and the side chain composition of the polymers had a pronounced effect while the chemical structure of oligopeptides had only moderate influence on the average degree of substitution.
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Affiliation(s)
- Ildikó B. Nagy
- Research Group for Peptide Chemistry, Hungarian Academy of Science, Eötvös L. University, P.O. Box 32, Budapest 112, Hungary H-1518
| | - Andrea Dancs
- Research Group for Peptide Chemistry, Hungarian Academy of Science, Eötvös L. University, P.O. Box 32, Budapest 112, Hungary H-1518
| | - György Kóczán
- Research Group for Peptide Chemistry, Hungarian Academy of Science, Eötvös L. University, P.O. Box 32, Budapest 112, Hungary H-1518
| | - Gábor Mezö
- Research Group for Peptide Chemistry, Hungarian Academy of Science, Eötvös L. University, P.O. Box 32, Budapest 112, Hungary H-1518
| | - Ferenc Hudecz
- Research Group for Peptide Chemistry, Hungarian Academy of Science, Eötvös L. University, P.O. Box 32, Budapest 112, Hungary H-1518
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17
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Szabó I, Orbán E, Schlosser G, Hudecz F, Bánóczi Z. Cell-penetrating conjugates of pentaglutamylated methotrexate as potential anticancer drugs against resistant tumor cells. Eur J Med Chem 2016; 115:361-8. [PMID: 27031212 DOI: 10.1016/j.ejmech.2016.03.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 01/06/2016] [Revised: 02/28/2016] [Accepted: 03/14/2016] [Indexed: 12/27/2022]
Abstract
The emerging resistance of tumor cells against methotrexate (MTX) is one of the major limitations of the MTX treatment of tumorous diseases. The disturbance in the polyglutamation which is a main step in the mechanism of methotrexate action is often the reason of the resistance. Delivery of polyglutamylated MTX into cells may evade the mechanisms that are responsible for drug resistance. In this study conjugates of methotrexate and its pentaglutamylated derivatives with cell-penetrating peptides - penetratin and octaarginine - were investigated. The cellular-uptake and in vitro cytostatic activity of conjugates were examined on breast cancer cell cultures (MDA-MB-231 as resistant and MCF-7 as sensitive cell culture). These cell cultures showed very different behaviour towards the conjugates. Although the presence of pentaglutamyl moiety significantly decreased the internalisation of conjugates, some of them were significantly active in vitro. All of the conjugates were able to penetrate in some extent into both cell types, but only the conjugates of penetratin showed in vitro cytostatic activity. The most effective conjugates were the MTX-Glu5-Penetratin(desMet) and MTX-Glu5-GFLG-Penetratin(desMet). The latter was effective on both cell cultures while the former was active only on the resistant tumor cells. Our results suggest that the translocation of polyglutamylated MTX may be a new way to treat sensitive and more importantly resistant tumors. While both penetratin and octaarginine peptides were successfully used to deliver several kinds of cargos earlier in our case the activity of penetratin conjugates was more pronounced.
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Affiliation(s)
- Ildikó Szabó
- MTA-ELTE Research Group of Peptide Chemistry, Budapest, Hungary
| | - Erika Orbán
- MTA-ELTE Research Group of Peptide Chemistry, Budapest, Hungary
| | - Gitta Schlosser
- MTA-ELTE Research Group of Peptide Chemistry, Budapest, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Budapest, Hungary; Department of Organic Chemistry, Eötvös L. University, Budapest, Hungary
| | - Zoltán Bánóczi
- MTA-ELTE Research Group of Peptide Chemistry, Budapest, Hungary; Department of Organic Chemistry, Eötvös L. University, Budapest, Hungary.
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18
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Szarka E, Huber K, Magyar A, Iliás A, Aradi P, Gáti T, Rojkovich B, Nagy G, Hudecz F, Sármay G. A2.27 Affinity measurements of anti-citrullinated protein/peptide antibodies in sera of rheumatoid arthritis patients by applying biosensor analysis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-209124.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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19
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20
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Pozsgay J, Babos F, Uray K, Magyar A, Gyulai G, Kiss É, Nagy G, Rojkovich B, Hudecz F, Sármay G. In vitro eradication of citrullinated protein specific B-lymphocytes of rheumatoid arthritis patients by targeted bifunctional nanoparticles. Arthritis Res Ther 2016; 18:15. [PMID: 26780830 PMCID: PMC4718042 DOI: 10.1186/s13075-016-0918-0] [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: 10/22/2015] [Accepted: 01/04/2016] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Autoreactive B cells are crucial players in the pathogenesis of rheumatoid arthritis (RA). Autoantibodies specific for citrullinated proteins (ACPA), present in the serum of approximately 60-70 % of patients, have a pathogenic role in the disease. B cell depleting therapies may result in a transient immunosuppression, increasing the risk of infections. Our aim was to develop a new therapeutic approach to selectively deplete the ACPA producing autoreactive B cells. METHODS To target B cells synthetic citrullinated peptide derived from the β chain of fibrin, β60-74Cit 60,72,74 (β60-74Cit), the predominant epitope recognized by ACPA was used. Complement dependent cytotoxicity (CDC) was induced by a modified peptide derived from gp120 of HIV-1. To trigger CDC both the targeting peptide and the complement activating peptide were covalently coupled in multiple copies to the surface of poly (DL-lactic-co-glycolic acid) nanoparticles (NPs). Ex vivo antibody synthesis was examined by ELISA and ELISpot. CDC was tested after dead cell staining by flow cytometry. RESULTS The β60-74Cit peptide was selectively recognized by a small subset of B cells from RA patients having high level of peptide specific serum antibody, suggesting that the peptide can target diseased B cells. The modified gp120 peptide covalently coupled to NPs induced the formation of the complement membrane attack complex, C5b-9 in human serum. We show here for the first time that bifunctional NPs coupled to multiple copies of both the targeting peptide and the complement activating effector peptide on their surface significantly reduce β60-74Cit peptide specific ex vivo ACPA production, by inducing complement dependent lysis of the citrullinated peptide specific B cells of seropositive RA patients. CONCLUSIONS Bifunctional NPs covalently coupled to autoantigen epitope peptide and to a lytic peptide activating complement may specifically target and deplete the peptide specific autoreactive B-cells.
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Affiliation(s)
- Judit Pozsgay
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary. .,MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - Fruzsina Babos
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - Katalin Uray
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - Anna Magyar
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary. .,MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - Gergő Gyulai
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - Éva Kiss
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - György Nagy
- Department of Rheumatology, Polyclinic of the Hospitaller Brothers of St. John of God, Budapest, 1023, Hungary.
| | - Bernadette Rojkovich
- Department of Rheumatology, Polyclinic of the Hospitaller Brothers of St. John of God, Budapest, 1023, Hungary.
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, 1117, Hungary. .,Department of Organic Chemistry, Eötvös Loránd University, Budapest, 1117, Hungary.
| | - Gabriella Sármay
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary.
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21
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Pozsgay J, Szarka E, Huber K, Babos F, Magyar A, Hudecz F, Sarmay G. Synthetic Peptide-Based ELISA and ELISpot Assay for Identifying Autoantibody Epitopes. Methods Mol Biol 2016; 1352:223-233. [PMID: 26490479 DOI: 10.1007/978-1-4939-3037-1_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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] [Indexed: 06/05/2023]
Abstract
Enzyme-linked immunosorbent assay (ELISA) is an invaluable diagnostic tool to detect serum autoantibody binding to target antigen. To map the autoantigenic epitope(s), overlapping synthetic peptides covering the total sequence of a protein antigen are used. A large set of peptides synthesized on the crown of pins can be tested by Multipin ELISA for fast screening. Next, to validate the results, the candidate epitope peptides are resynthesized by solid-phase synthesis, coupled to ELISA plate directly, or in a biotinylated form, bound to neutravidin-coated surface and the binding of autoantibodies from patients' sera is tested by indirect ELISA. Further, selected epitope peptides can be applied in enzyme-linked immunospot assay to distinguish individual, citrullinated peptide-specific autoreactive B cells in a pre-stimulated culture of patients' lymphocytes.
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Affiliation(s)
- Judit Pozsgay
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary
| | - Eszter Szarka
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary
| | - Krisztina Huber
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary
| | - Fruzsina Babos
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Budapest, Hungary
| | - Anna Magyar
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ferenc Hudecz
- Department of Organic Chemistry, Eötvös Loránd University, Budapest, Hungary
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Budapest, Hungary
| | - Gabriella Sarmay
- Department of Immunology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary.
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22
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Kocsis L, Szabó I, Bősze S, Jernei T, Hudecz F, Csámpai A. Synthesis, structure and in vitro cytostatic activity of ferrocene-Cinchona hybrids. Bioorg Med Chem Lett 2015; 26:946-949. [PMID: 26739780 DOI: 10.1016/j.bmcl.2015.12.059] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 09/26/2015] [Revised: 12/14/2015] [Accepted: 12/17/2015] [Indexed: 10/22/2022]
Abstract
Exploring copper(I)- and ruthenium(II)-catalyzed azide-alkyne cycloadditions and a Sonogashira protocol, novel cytostatic ferrocene-cinchona hybrids were synthetized displaying significant in vitro activity on HepG-2 and HT-29 cells. Preliminary SAR studies disclosed that compounds incorporating linkers with 1,2,3-triazole and chalchone residues can be considered as promising lead structures. According to the best of our knowledge this is the first letter on the incorporation of ferrocene nucleus in the reputed cinchona family via triazole and chalcone linkers with established pharmaceutical profile.
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Affiliation(s)
- László Kocsis
- MTA-ELTE Research Group of Peptide Chemistry, Budapest Pázmány P. sétány 1/A, H-1117, Hungary
| | - Ildikó Szabó
- Department of Organic Chemistry, Eötvös Loránd University (ELTE), Budapest Pázmány P. sétány 1/A, H-1117, Hungary
| | - Szilvia Bősze
- Department of Organic Chemistry, Eötvös Loránd University (ELTE), Budapest Pázmány P. sétány 1/A, H-1117, Hungary
| | - Tamás Jernei
- Department of Inorganic Chemistry, Eötvös Loránd University (ELTE), Budapest Pázmány P. sétány 1/A, H-1117, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Budapest Pázmány P. sétány 1/A, H-1117, Hungary; Department of Organic Chemistry, Eötvös Loránd University (ELTE), Budapest Pázmány P. sétány 1/A, H-1117, Hungary
| | - Antal Csámpai
- Department of Inorganic Chemistry, Eötvös Loránd University (ELTE), Budapest Pázmány P. sétány 1/A, H-1117, Hungary.
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23
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Horvati K, Bősze S, Gideon HP, Bacsa B, Szabó TG, Goliath R, Rangaka MX, Hudecz F, Wilkinson RJ, Wilkinson KA. Population tailored modification of tuberculosis specific interferon-gamma release assay. J Infect 2015; 72:179-88. [PMID: 26632326 PMCID: PMC4747975 DOI: 10.1016/j.jinf.2015.10.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/13/2015] [Accepted: 10/23/2015] [Indexed: 11/12/2022]
Abstract
Objectives Blood-based Interferon-Gamma Release Assays (IGRA) identify Mycobacterium tuberculosis (MTB) sensitisation with increased specificity, but sensitivity remains impaired in human immunodeficiency virus (HIV) infected persons. The QuantiFERON-TB Gold In-Tube test contains peptide 38–55 of Rv2654c, based on data indicating differential recognition between tuberculosis patients and BCG vaccinated controls in Europe. We aimed to fine map the T cell response to Rv2654c with the view of improving sensitivity. Methods Interferon-gamma ELISpot assay was used in HIV uninfected persons with latent and active tuberculosis to map peptide epitopes of Rv2654c. A modified IGRA was tested in two further groups of 55 HIV uninfected and 44 HIV infected persons, recruited in South Africa. Results The most prominently recognised peptide was between amino acids 51–65. Using p51-65 to boost the QuantiFERON-TB Gold In-Tube assay, the quantitative performance of the modified IGRA increased from 1.83 IU/ml (IQR 0.30–7.35) to 2.83 (IQR 0.28–12.2; p = 0.002) in the HIV uninfected group. In the HIV infected cohort the percentage of positive responders increased from 57% to 64% but only after 3 months of ART (p = ns). Conclusions Our data shows the potential to population tailor detection of MTB sensitization using specific synthetic peptides and interferon-gamma release in vitro. Refined epitope mapping of Rv2654c was performed in a South African Xhosa population. The most frequently recognized peptide is p51-65 (VRAVAESHGVAAVLF). Using p51-65 in the QFT assay resulted in a significant boosting effect. Peptide p51-65 can improve the population tailored detection of MTB sensitization.
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Affiliation(s)
- Kata Horvati
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary
| | - Hannah P Gideon
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Bernadett Bacsa
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary
| | - Tamás G Szabó
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary; Department of Laboratory Medicine, Semmelweis University, Budapest, Hungary
| | - Rene Goliath
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Molebogeng X Rangaka
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary; Department of Organic Chemistry, Eötvös L. University, Budapest, Hungary
| | - Robert J Wilkinson
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa; The Francis Crick Institute Mill Hill Laboratory, London NW7 1AA, UK; Department of Medicine, Imperial College London W2 1PG, UK
| | - Katalin A Wilkinson
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa; The Francis Crick Institute Mill Hill Laboratory, London NW7 1AA, UK.
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24
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Szabados H, Uray K, Majer Z, Silló P, Kárpáti S, Hudecz F, Bősze S. Characterization of desmoglein-3 epitope region peptides as synthetic antigens: analysis of their in vitro T cell stimulating efficacy, cytotoxicity, stability, and their conformational features. J Pept Sci 2015; 21:731-42. [PMID: 26250896 DOI: 10.1002/psc.2800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/18/2015] [Revised: 06/05/2015] [Accepted: 06/13/2015] [Indexed: 11/09/2022]
Abstract
Desmoglein-3 (Dsg3) adhesion protein is the main target of autoantibodies and autoreactive T cells in Pemphigus vulgaris (PV) autoimmune skin disorder. Several mapping studies of Dsg3 T cell epitope regions were performed, and based on those data, we designed and synthesized four peptide series corresponding to Dsg3 T cell epitope regions. Each peptide series consists of a 17mer full-length peptide (Dsg3/189-205, Dsg3/206-222, Dsg3/342-358, and Dsg3/761-777) and its N-terminally truncated derivatives, resulting in 15 peptides altogether. The peptides were prepared on solid phase and were chemically characterized. In order to establish a structure-activity relationship, the solution conformation of the synthetic peptides has been investigated using electronic circular dichroism spectroscopy. The in vitro T cell stimulating efficacy of the peptides has been determined on peripheral blood mononuclear cells isolated from whole blood of PV patients and also from healthy donors. After 20 h of stimulation, the interferon (IFN)-γ content of the supernatants was measured by enzyme-linked immunosorbent assay. In the in vitro conditions, peptides were stable and non-cytotoxic. The in vitro IFN-γ production profile of healthy donors and PV patients, induced by peptides as synthetic antigens, was markedly different. The most unambiguous differences were observed after stimulation with 17mer peptide Dsg3/342-358, and three truncated derivatives from two other peptide series, namely, peptides Dsg3/192-205, Dsg3/763-777, and Dsg3/764-777. Comparative analysis of in vitro activity and the capability of oligopeptides to form ordered or unordered secondary structure showed that peptides bearing high solvent sensibility and backbone flexibility were the most capable to distinguish between healthy and PV donors.
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Affiliation(s)
- Hajnalka Szabados
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, PO Box 32 H-1518, Budapest, 112, Hungary
| | - Katalin Uray
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, PO Box 32 H-1518, Budapest, 112, Hungary
| | - Zsuzsa Majer
- Laboratory for Chiroptical Structure Analysis, Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary
| | - Pálma Silló
- Department of Dermatology, Venereology and Dermato-Oncology, Semmelweis University, Budapest, Hungary
| | - Sarolta Kárpáti
- Department of Dermatology, Venereology and Dermato-Oncology, Semmelweis University, Budapest, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, PO Box 32 H-1518, Budapest, 112, Hungary.,Department of Organic Chemistry, Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, PO Box 32 H-1518, Budapest, 112, Hungary
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25
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Szabó R, Láng O, Láng J, Illyés E, Kőhidai L, Hudecz F. Effect of SXWS/WSXWS peptides on chemotaxis and adhesion of the macrophage-like cell line J774. J Mol Recognit 2015; 28:253-60. [PMID: 25683456 DOI: 10.1002/jmr.2439] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 04/27/2014] [Revised: 09/28/2014] [Accepted: 09/28/2014] [Indexed: 11/06/2022]
Abstract
WSXWS motif is a conserved amino acid sequence that is present in type I cytokine receptors. This motif that can be found both in the ligand binding chains and signal transducer molecule of the receptors with different amino acids at the position "X" plays a role in the receptor folding, ligand binding and signal transduction as well. Structural analysis proved that WSEWS motif of IL-6R is located in a highly accessible location in the protein. Structural properties and chemotaxis of a tetrapeptide library with SXWS sequence, where X was the 19 proteinogenic amino acids except cystein were systematically studied earlier. It has been proved that C-terminal amidation and the identity of amino acid X had a pronounced influence on the chemotactic properties but less of the structure of the peptides. Here, we present our findings on the effect of a tetrapeptide and a pentapeptide library with the sequence of SXWS and WSXWS on the chemotaxis and adhesion of J774 murine macrophage cell line. We studied the effect of the presence/absence of N-terminal tryptophan and the different amino acids at the X position on these physiological responses. Results indicated that amino acid X had a marked influence on chemotaxis, adhesion as well as on proliferation induced by (W)SXWS peptides. Elongation of SXWS sequence with a tryptophan at the N terminus also altered pronouncedly all the physiological responses of the cells studied. A good correlation could be observed between the chemotaxis and the proliferation and physicochemical parameters of the amino acid X.
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Affiliation(s)
- Rita Szabó
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, P.O. Box 32, H-1518, Budapest, 112, Hungary
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26
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Horváti K, Bacsa B, Szabó N, Fodor K, Balka G, Rusvai M, Kiss É, Mező G, Grolmusz V, Vértessy B, Hudecz F, Bősze S. Antimycobacterial activity of peptide conjugate of pyridopyrimidine derivative against Mycobacterium tuberculosis in a series of in vitro and in vivo models. Tuberculosis (Edinb) 2015; 95 Suppl 1:S207-11. [PMID: 25728610 DOI: 10.1016/j.tube.2015.02.026] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
New pyridopyrimidine derivatives were defined using a novel HTS in silico docking method (FRIGATE). The target protein was a dUTPase enzyme (EC 3.6.1.23; Rv2697) which plays a key role in nucleotide biosynthesis of Mycobacterium tuberculosis (Mtb). Top hit molecules were assayed in vitro for their antimycobacterial effect on Mtb H37Rv culture. In order to enhance the cellular uptake rate, the TB820 compound was conjugated to a peptid-based carrier and a nanoparticle type delivery system (polylactide-co-glycolide, PLGA) was applied. The conjugate had relevance to in vitro antitubercular activity with low in vitro and in vivo toxicity. In a Mtb H37Rv infected guinea pig model the in vivo efficacy of orally administrated PLGA encapsulated compound was proven: animals maintained a constant weight gain and no external clinical signs of tuberculosis were observed. All tissue homogenates from lung, liver and kidney were found negative for Mtb, and diagnostic autopsy showed that no significant malformations on the tissues occurred.
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Affiliation(s)
- Kata Horváti
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Budapest, Hungary
| | - Bernadett Bacsa
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Budapest, Hungary
| | - Nóra Szabó
- Laboratory of Bacteriology, Korányi National Institute for Tuberculosis and Respiratory Medicine, Budapest, Hungary
| | - Kinga Fodor
- Department of State Veterinary Medicine and Agricultural Economics, Faculty of Veterinary Science, Szent István University, Budapest, Hungary
| | - Gyula Balka
- Department of Pathology and Forensic Veterinary Medicine, Faculty of Veterinary Science, Szent István University, Budapest, Hungary
| | - Miklós Rusvai
- Department of Pathology and Forensic Veterinary Medicine, Faculty of Veterinary Science, Szent István University, Budapest, Hungary
| | - Éva Kiss
- Laboratory of Interfaces and Nanostructures, Eötvös L. University, Budapest, Hungary
| | - Gábor Mező
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Budapest, Hungary
| | - Vince Grolmusz
- Protein Information Technology Group, Eötvös L. University, Budapest, Hungary
| | - Beáta Vértessy
- Institute of Enzimology, Hungarian Academy of Science, Budapest, Hungary
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Budapest, Hungary; Department of Organic Chemistry, Eötvös L. University, Budapest, Hungary
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University, Budapest, Hungary.
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27
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Horváti K, Bacsa B, Kiss É, Gyulai G, Fodor K, Balka G, Rusvai M, Szabó E, Hudecz F, Bősze S. Nanoparticle Encapsulated Lipopeptide Conjugate of Antitubercular Drug Isoniazid: In Vitro Intracellular Activity and in Vivo Efficacy in a Guinea Pig Model of Tuberculosis. Bioconjug Chem 2014; 25:2260-8. [DOI: 10.1021/bc500476x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Eleonóra Szabó
- Laboratory
of Bacteriology, Korányi National Institute for Tuberculosis and Respiratory Medicine, Budapest, 1122 Hungary
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28
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Uray K, Mizuno M, Inazu T, Goto K, Hudecz F. The effect of glycosylation on the antibody recognition of a MUC2 mucin epitope. Biopolymers 2014; 102:390-5. [DOI: 10.1002/bip.22526] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 06/26/2014] [Accepted: 07/15/2014] [Indexed: 01/23/2023]
Affiliation(s)
- Katalin Uray
- Research Group of Peptide Chemistry; Eötvös L. University, Hungarian Academy of Sciences; Budapest Hungary
| | - Mamoru Mizuno
- Laboratory of Glyco-Organic Chemistry; The Noguchi Institute; Tokyo Japan
| | - Toshiyuki Inazu
- Department of Applied Chemistry; School of Engineering, Tokai University; Hiratsuka Japan
- Institute of Glycoscience, Tokai University; Hiratsuka Japan
| | - Kohtaro Goto
- Laboratory of Glyco-Organic Chemistry; The Noguchi Institute; Tokyo Japan
| | - Ferenc Hudecz
- Research Group of Peptide Chemistry; Eötvös L. University, Hungarian Academy of Sciences; Budapest Hungary
- Institute of Chemistry, Eötvös Loránd University; Budapest Hungary
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29
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Szarka E, Babos F, Magyar A, Huber K, Szittner Z, Papp K, Prechl J, Pozsgay J, Neer Z, Ádori M, Nagy G, Rojkovich B, Gáti T, Kelemen J, Baka Z, Brózik M, Pazár B, Poór G, Hudecz F, Sármay G. Recognition of new citrulline-containing peptide epitopes by autoantibodies produced in vivo and in vitro by B cells of rheumatoid arthritis patients. Immunology 2014; 141:181-91. [PMID: 24116744 DOI: 10.1111/imm.12175] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 07/17/2013] [Revised: 09/09/2013] [Accepted: 09/24/2013] [Indexed: 12/18/2022] Open
Abstract
Anti-citrullinated peptide/protein antibodies (ACPAs) are highly sensitive and specific markers of rheumatoid arthritis (RA). Identification of peptide epitopes that may detect different subgroups of RA patients might have diagnostic and prognostic significance. We have investigated citrulline- and arginine-containing peptide pairs derived from filaggrin, collagen or vimentin, and compared this citrulline-peptide panel with the serological assays conventionally used to detect ACPAs. Furthermore, we studied if the same citrulline-peptides identify antibody-secreting cells in in vitro cultures of RA B cells. Recognition of citrulline- and arginine-containing filaggrin, vimentin and collagen peptide epitopes were tested by Multipin ELISA system, by indirect ELISA and by a peptide-specific microarray. B cells were purified from blood by negative selection; antibody-producing cells were enumerated by ELISPOT assay. The panel composed of citrulline-peptide epitopes of filaggrin, collagen and vimentin was recognized by RA sera with a sensitivity and specificity comparable with the currently used tests. Moreover, the combined citrulline-peptide panel including the new short epitope peptide of filaggrin, fil311-315, also identified nearly one-third of RA cases that were negative for antibodies against cyclic citrullinated peptides, mutated citrullinated vimentin or for rheumatoid factor. The results with the peptide-specific microarray have shown that although most ACPAs recognizing the four citrulline peptides are IgG, some of them specifically recognizing citrulline-containing filaggrin peptides (fil311-315 and fil306-326) are IgM, and so may be produced either by newly formed activated B cells or by unswitched B memory cells. Furthermore, the citrulline-peptides of filaggrin and vimentin detect ACPA-producing cells, and so could also be applied to study the B cells of RA patients.
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Affiliation(s)
- Eszter Szarka
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
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30
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Díaz E, Köhidai L, Ríos A, Vanegas O, Silva A, Szabó R, Mező G, Hudecz F, Ponte-Sucre A. Leishmania braziliensis: cytotoxic, cytostatic and chemotactic effects of poly-lysine-methotrexate-conjugates. Exp Parasitol 2013; 135:134-41. [PMID: 23816643 DOI: 10.1016/j.exppara.2013.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 08/01/2012] [Revised: 06/04/2013] [Accepted: 06/12/2013] [Indexed: 10/26/2022]
Abstract
Chemotactic responses play a significant role during Leishmania differentiation, as well as in the course of parasite-host-cell interaction, a process that precedes a successful infection. The present study uses the modified "two-chamber capillary assay" to quantitatively evaluate the chemotactic properties and the toxic activities of methotrexate containing branched chain polymeric polypeptide conjugates in Leishmania. Our results demonstrate that this methodology quantitatively determines the taxis of Leishmania towards/against gradients of compounds. They also demonstrate that chemotaxis produced by the polypeptide-methotrexate conjugates depends on specific chemical characteristics. For example, the N-terminal amino acid (Ser or Glu) location at the branch significantly influences the elicited chemotaxis. Furthermore, the use of different attachment sites in the methotrexate conjugates (α- or γ-carboxylic groups) affect their chemotactic activity. Specific cytotoxic activities and cytostatic effects of the conjugates on parasites and on murine and human cells of the macrophage/monocyte system respectively, suggest that these ligands may be used as a group of anti-Leishmania substances acting selectively on Leishmania and different hosts.
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Affiliation(s)
- Emilia Díaz
- Laboratorio de Fisiología Molecular, Instituto de Medicina Experimental, Escuela Luis Razetti, Facultad de Medicina, Universidad Central de Venezuela, Venezuela
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31
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Babos F, Szarka E, Nagy G, Majer Z, Sármay G, Magyar A, Hudecz F. Role of N- or C-terminal biotinylation in autoantibody recognition of citrullin containing filaggrin epitope peptides in rheumatoid arthritis. Bioconjug Chem 2013; 24:817-27. [PMID: 23617702 DOI: 10.1021/bc400073z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here, we report on the synthesis, conformational analysis, and autoantibody binding properties of new sets of rheumatoid arthritis (RA) specific biotin-peptide conjugates derived from filaggrin epitope peptides. The biotin with or without a linker was attached to the Cit or Arg containing epitope core ((311)TXGRS(315)) or epitope region ((306)SHQESTXGXSXGRSGRSGS(324)) peptide (where X = Cit), through an amide bond at the N- or C-terminal of the epitopes. Antibody binding was detected by indirect enzyme-linked immunosorbent assay (ELISA) using sera from RA, Systemic lupus erythematosus (SLE) patients, as well as healthy individuals, and the secondary structure of conjugates was investigated by electronic circular dichroism (ECD). We found that autoantibodies from RA patients recognize specifically both filaggrin epitope region ((306)SHQESTXGXSXGRSGRSGS(324)) and short epitope core ((311)TXGRS(315)) peptides. Our data also indicate that the positioning of the biotin label within a peptide sequence can markedly influence the antibody binding, but the length of the linker incorporated has essentially no effect on the recognition. ECD experiments demonstrate that the Arg/Cit change does not influence the solution conformation of the peptide conjugates. However, the presence and position of the biotin moiety has a pronounced effect on the conformation of the 5-mer epitope core peptides, while it does not alter the secondary structure of the 19-mer epitope region peptides.
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Affiliation(s)
- Fruzsina Babos
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
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32
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Cornillet M, Sebbag M, Verrouil E, Magyar A, Babos F, Ruyssen-Witrand A, Hudecz F, Cantagrel A, Serre G, Nogueira L. The fibrin-derived citrullinated peptide β60-74Cit₆₀,₇₂,₇₄ bears the major ACPA epitope recognised by the rheumatoid arthritis-specific anticitrullinated fibrinogen autoantibodies and anti-CCP2 antibodies. Ann Rheum Dis 2013; 73:1246-52. [PMID: 23636655 DOI: 10.1136/annrheumdis-2012-202868] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To evaluate the proportions of rheumatoid arthritis (RA) sera containing anticitrullinated proteins autoantibodies (ACPA) reactive to α36-50Cit₃₈,₄₂ and/or β60-74Cit₆₀,₇₂,₇₄, two peptides identified as bearing the immunodominant epitopes of their major target, citrullinated fibrin. To analyse the relationships of anti-α36-50Cit₃₈,₄₂ and anti-β60-74Cit₆₀,₇₂,₇₄ autoantibodies with autoantibodies reactive to the complete citrullinated human fibrinogen molecule (AhFibA) and with anti-CCP2 antibodies. METHODS 617 sera from 181 patients with established RA and 436 with non-RA rheumatic diseases were tested by ELISA for AhFibA, anti-CCP2, anti-α36-50Cit₃₈,₄₂, anti-β60-74Cit₆₀,₇₂,₇₄ autoantibodies, and by nephelometry for rheumatoid factor (RF). Diagnostic indexes, correlations and concordances between tests were analysed. Crossreactivity of anti-α36-50Cit₃₈,₄₂ and anti-β60-74Cit₆₀,₇₂,₇₄ autoantibodies was assessed in competition experiments. RESULTS At a diagnostic specificity of 95%, the diagnostic sensitivity of AhFibA (83%) was significantly higher than that of all other tests. The diagnostic sensitivity of anti-β60-74Cit₆₀,₇₂,₇₄ (71%) was significantly higher than that of anti-α36-50Cit₃₈,₄₂ autoantibodies (51%) but similar to that of anti-CCP2 (74%). Titres of RF, anti-α36-50Cit₃₈,₄₂ and anti-β60-74Cit₆₀,₇₂,₇₄ autoantibodies were weakly correlated with each other, whereas titres of anti-β60-74Cit₆₀,₇₂,₇₄ were strongly correlated with those of AhFibA (r=0.633) and anti-CCP2 (r=0.634). Anti-α36-50Cit₃₈,₄₂ and anti-β60-74Cit₆₀,₇₂,₇₄ mainly corresponded to two non-crossreactive subfamilies of ACPA. More than 90% of AhFibA-positive or anti-CCP2-positive sera recognised the α36-50Cit₃₈,₄₂ and/or the β60-74Cit₆₀,₇₂,₇₄ peptide. CONCLUSIONS Autoantibodies reactive to α36-50Cit₃₈,₄₂ and β60-74Cit₆₀,₇₂,₇₄ form two distinct, non-overlapping subfamilies of ACPA that, together, cover practically all the ACPA reactivity to citrullinated fibrinogen and to CCP2 antigens. In established RA, anti-β60-74Cit₆₀,₇₂,₇₄ autoantibodies show diagnostic indexes similar to those of anti-CCP2.
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Affiliation(s)
- M Cornillet
- , Epidermis Differentiation and Rheumatoid Autoimmunity' Laboratory, UMR CNRS 5165, INSERM U 1056, Toulouse III University, , Toulouse, France
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Bánóczi Z, Tantos Á, Farkas A, Majer Z, Dókus LE, Tompa P, Hudecz F. New m-calpain substrate-based azapeptide inhibitors. J Pept Sci 2013; 19:370-6. [DOI: 10.1002/psc.2511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 03/05/2013] [Accepted: 03/05/2013] [Indexed: 01/12/2023]
Affiliation(s)
- Zoltán Bánóczi
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös Loránd University; Budapest Hungary
| | - Ágnes Tantos
- Institute of Enzymology, Biological Research Center; Hungarian Academy of Sciences; Budapest Hungary
| | - Attila Farkas
- Institute of Enzymology, Biological Research Center; Hungarian Academy of Sciences; Budapest Hungary
| | - Zsuzsa Majer
- Institute of Chemistry; Eötvös Loránd University; Budapest Hungary
| | - Levente E. Dókus
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös Loránd University; Budapest Hungary
| | - Péter Tompa
- Institute of Enzymology, Biological Research Center; Hungarian Academy of Sciences; Budapest Hungary
| | - Ferenc Hudecz
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös Loránd University; Budapest Hungary
- Institute of Chemistry; Eötvös Loránd University; Budapest Hungary
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Csuka D, Simon D, Hóbor R, Uray K, Prohászka Z, Bánlaki Z, Jani PK, Szilágyi Á, Hudecz F, Rajczy K, Beke G, Boros Major A, Tordai A, Illés Z, Berki T, Czirják L, Füst G. Serum concentration of immunoglobulin G-type antibodies against the whole Epstein-Barr nuclear antigen 1 and its aa35-58 or aa398-404 fragments in the sera of patients with systemic lupus erythematosus and multiple sclerosis. Clin Exp Immunol 2013; 171:255-62. [PMID: 23379431 DOI: 10.1111/cei.12022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2012] [Indexed: 11/26/2022] Open
Abstract
Several studies suggest that infection by Epstein-Barr virus (EBV) might be one of the environmental factors which facilitates the development of autoimmune disorders in genetically susceptible individuals. Recent data indicate that high anti-Epstein-Barr nuclear antigen 1 (EBNA)-1 immunoglobulin (Ig)G titre is a strong risk factor for multiple sclerosis (MS) in patients both with and without the main genetic predisposing trait, human leucocyte antigen (HLA)-DRB1*15:01. Because no similar studies have been published in systemic lupus erythematosus (SLE) patients, we determined the HLA-DRB1*15:01 carrier state and the serum titres against the whole EBNA-1 and its small fragments aa35-58 and aa398-404 in 301 SLE patients, 135 MS patients and in 345 healthy controls. The carrier state of the HLA-DRB1*15:01 allele was deduced from genotyping of a tagSNP (rs3135388) by applying a Taqman-based assay. The serum concentrations of antibodies to EBNA-1 and its aa35-58 or aa398-404 fragments were determined using a commercial assay (ETI-EBNA-G) and home-made enzyme-linked immunosorbent assays, respectively. The serum concentration of anti-EBNA-1 antibodies was significantly (P < 0·001) higher both in MS and SLE patients than in controls. Similar significant differences were found both in HLA-DRB1*15:01 carriers and non-carriers. Furthermore, titres of antibodies against the aa35-58 EBNA-1 fragment were elevated both in MS and SLE patients. By contrast, the levels of aa398-404 EBNA-1 antibodies were elevated significantly only in the SLE patients. These findings indicate that high anti-EBNA-1 IgG titres are HLA-DRB1*15:01-independent risk factors not only for MS, but also for SLE, while high antibody titres against the aa398-404 fragment are characteristic for SLE.
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Affiliation(s)
- D Csuka
- Third Department of Internal Medicine, Semmelweis University, Budapest, Hungary.
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Cornillet M, Sebbag M, Verrouil E, Magyar A, Ruyssen-Witrand A, Hudecz F, Cantagrel A, Serre G, Nogueira L. A5.7 Autoantibodies to the Fibrin-Derived Citrullinated Peptides α36–50 and β60–74 are Two Distinct Non-Overlapping Subfamilies of ACPA that together almost Summarise their Reactivity to Citrullinated Fibrinogen and to CCP2 Antigens. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-203219.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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36
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Szarka E, Huber K, Pozsgay J, Babos F, Gáti T, Magyar A, Hudecz F, Rojkovich B, Nagy G, Sármay G. A5.11 Detection of ACPA Producing B-Cells by a Citrulline Peptide Panel. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-203219.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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37
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Szabados H, Bősze S, Silló P, Kárpáti S, Hudecz F, Uray K. The mapping of linear B-cell epitope regions in the extracellular parts of the desmoglein 1 and 3 proteins: recognition of immobilized peptides by pemphigus patients' serum autoantibodies. J Pept Sci 2013; 19:84-94. [DOI: 10.1002/psc.2476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Revised: 11/09/2012] [Accepted: 11/19/2012] [Indexed: 01/24/2023]
Affiliation(s)
- Hajnalka Szabados
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös L. University; Budapest 112 PO Box 32 H-1518 Hungary
| | - Szilvia Bősze
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös L. University; Budapest 112 PO Box 32 H-1518 Hungary
| | - Pálma Silló
- Department of Dermatology, Venereology and Dermato-Oncology; Semmelweis University; Budapest Hungary
| | - Sarolta Kárpáti
- Department of Dermatology, Venereology and Dermato-Oncology; Semmelweis University; Budapest Hungary
| | - Ferenc Hudecz
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös L. University; Budapest 112 PO Box 32 H-1518 Hungary
- Institute of Chemistry; Eötvös L. University; Budapest Hungary
| | - Katalin Uray
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences; Eötvös L. University; Budapest 112 PO Box 32 H-1518 Hungary
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Sendula R, Orbán E, Hudecz F, Sági G, Jablonkai I. Synthesis and cytotoxic activity of novel 5-substituted-1-(β-L-arabinofuranosyl) pyrimidine nucleosides. Nucleosides Nucleotides Nucleic Acids 2012; 31:482-500. [PMID: 22646088 DOI: 10.1080/15257770.2012.689410] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A series of new 5-halogeno-1-(ß-L-arabinofuranosyl)uracils and their cytosine analogues were synthesized by halogenation of ara-L-uridine and ara-L-cytidine, respectively. The 5-(2-thienyl) and 5-halogenothienyl derivatives of both series were also prepared in excellent yields by Stille coupling followed by halogenation. All of these syntheses were based on benzoyl-protected derivatives. In vitro cytotoxicity experiments carried out using L1210 mouse leukemia cells showed that 5-(2-thienyl)-ara-L-uridine was the most potent compound of the new compounds; the majority of the analogues were not effective up to 200 μM concentrations.
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Affiliation(s)
- Róbert Sendula
- Institute of Organic Chemistry, Research Center of Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
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39
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Orban E, Manea M, Marquardt A, Bosze S, Hudecz F. 128 The Effect of a Novel Daunomycin-conjugate With an ErbB2 Receptor-binding Peptide on the Protein Expression Profile of HL-50 Cells. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70828-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Horváti K, Bacsa B, Szabó N, Dávid S, Mező G, Grolmusz V, Vértessy B, Hudecz F, Bősze S. Enhanced cellular uptake of a new, in silico identified antitubercular candidate by peptide conjugation. Bioconjug Chem 2012; 23:900-7. [PMID: 22515329 DOI: 10.1021/bc200221t] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Mycobacterium tuberculosis is a successful pathogen, and it can survive in infected macrophages in dormant phase for years and decades. The therapy of tuberculosis takes at least six months, and the slow-growing bacterium is resistant to many antibiotics. The development of novel antimicrobials to counter the emergence of bacteria resistant to current therapies is urgently needed. In silico docking methods and structure-based drug design are useful bioinformatics tools for identifying new agents. A docking experiment to M. tuberculosis dUTPase enzyme, which plays a key role in the bacterial metabolism, has resulted in 10 new antitubercular drug candidates. The uptake of antituberculars by infected macrophages is limited by extracellular diffusion. The optimization of the cellular uptake by drug delivery systems can decrease the used dosages and the length of the therapy, and it can also enhance the bioavailability of the drug molecule. In this study, improved in vitro efficacy was achieved by attaching the TB5 antitubercular drug candidate to peptide carriers. As drug delivery components, (i) an antimicrobial granulysin peptide and (ii) a receptor specific tuftsin peptide were used. An efficient synthetic approach was developed to conjugate the in silico identified TB5 coumarone derivative to the carrier peptides. The compounds were effective on M. tuberculosis H37Rv culture in vitro; the chemical linkage did not affect the antimycobacterial activity. Here, we show that the OT20 tuftsin and GranF2 granulysin peptide conjugates have dramatically enhanced uptake into human MonoMac6 cells. The TB5-OT20 tuftsin conjugate exhibited significant antimycobacterial activity on M. tuberculosis H37Rv infected MonoMac6 cells and inhibited intracellular bacteria.
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Affiliation(s)
- Kata Horváti
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös L. University , Budapest, Hungary
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41
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Miklán Z, Orbán E, Bánóczi Z, Hudecz F. New pemetrexed-peptide conjugates: synthesis, characterization and in vitro cytostatic effect on non-small cell lung carcinoma (NCI-H358) and human leukemia (HL-60) cells. J Pept Sci 2012; 17:805-11. [PMID: 22076954 DOI: 10.1002/psc.1407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Pemetrexed (Pem) is a novel antimetabolite type of anticancer drug that demonstrated promising clinical activity in a wide variety of solid tumors, including non-small cell lung carcinoma and malignant pleural mesothelioma. It inhibits enzymes involved in the folate pathway, for which the presence of its free carboxylic groups is necessary. The heteroaromatic ring system of Pem has a modifiable amino group, which opens a possibility to apply a new strategy to conjugate Pem to carrier molecules. Considering this as well as the necessity of untouched carboxylic groups of Pem in the new conjugates, we developed a new synthesis strategy. Here, we describe the synthesis and the characterization of new Pem-peptide conjugates in which cell-penetrating octaarginine or/and lung-targeting H-Ile-Glu-Leu-Leu-Gln-Ala-Arg-NH(2) peptide is attached to the drug by thioether bond. The conjugates characterized by RP-HPLC and MS exhibited cytostatic effect in vitro on non-small cell lung carcinoma as well as on human leukemia cell lines. The IC(50) values of the conjugates were similar, but the conjugates with H-Ile-Glu-Leu-Leu-Gln-Ala-Arg-NH(2) sequence were slightly more effective. Our data show that the in vitro cytostatic effect of the free Pem was essentially maintained after conjugation with cell-penetrating or cell-targeting peptides. Thus, the conjugation strategy reported could lead to the development of a new generation of active Pem conjugates.
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Affiliation(s)
- Zsanett Miklán
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, Hungary
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42
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Füst G, Uray K, Bene L, Hudecz F, Karádi I, Prohászka Z. Comparison of epitope specificity of anti-heat shock protein 60/65 IgG type antibodies in the sera of healthy subjects, patients with coronary heart disease and inflammatory bowel disease. Cell Stress Chaperones 2012; 17:215-27. [PMID: 22038196 PMCID: PMC3273563 DOI: 10.1007/s12192-011-0301-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [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: 07/05/2011] [Revised: 10/05/2011] [Accepted: 10/06/2011] [Indexed: 01/12/2023] Open
Abstract
Previously, we reported on the presence of antibodies to linear epitopes of human and mycobacterial 60 kD heat shock proteins (HSP) in the sera of healthy blood donors. Since many recent findings indicate that the levels of these antibodies may be altered in coronary heart disease (CHD) and also inflammatory bowel diseases (IBD), it seemed worthwhile to compare the epitope specificity of the anti-HSP60 and anti-HSP65 antibodies in the sera of patients with these diseases to those in healthy subjects. The multipin enzyme-linked immunosorbent assay method was applied with a large overlapping set of synthetic 10-mer peptides covering selected regions of human HSP60 and Mycobacterium bovis HSP65. Sera of 12 healthy persons (HP), 14 CHD, and 14 IBD patients with the same concentration of total anti-HSP60 and HSP65 IgG antibodies were tested. We have identified CHD-specific epitopes in the equatorial domain of the HSP60 protein but in neither region of the HSP65 molecule, indicating that the formation of anti-HSP60 antibodies is not or only partially due to the cross-reaction between human HSP60 and bacterial HSP65. IBD-specific epitopes were found in many regions of the HSP60 and in even more regions of the HSP65 molecule including an IBD-specific T cell epitope in region X as well. These findings indicate that the epitope specificity of the anti-human and anti-mycobacterial HSP60 antibodies associated with various diseases is different.
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Affiliation(s)
- George Füst
- 3rd Department of Internal Medicine, Semmelweis University, Budapest, Hungary.
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43
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Láng O, Illyés E, Menyhárd DK, Láng J, Sebestyén F, Hudecz F, Kohidai L. Chemotaxis induced by SXWS tetrapeptides in Tetrahymena--overlapping chemotactic effects of SXWS sequences and their identical amino acids. J Mol Recognit 2012; 25:24-31. [PMID: 22213448 DOI: 10.1002/jmr.1166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The chemotactic potential of SXWS peptides and the components of the extracellular domain of cytokine receptors were investigated in Tetrahymena as a functional index of substitution with different amino acids in the position 'X' of the tetrapeptide. Data obtained demonstrate that position X plays a special determining role in the ligand, SEWS and STWS possess extremely strong chemoattractant ability, and aromatic amino acids result in chemorepellent ligands. Diverse effects of structurally related molecules, for example, SNWS-SDWS, demonstrate a highly sensitive discrimination potential in the applied model system. Physicochemical characteristics (hydropathy, residue size, and solvent-exposed area) of the amino acids were correlated with the chemotactic activity. Data obtained by computer-assisted conformation analysis of SXWS peptides and the highly overlapping chemotactic effects of the investigated SXWS peptides as well as the presence of the amino acids in the 'X' position indicate that member 'X' of the SXWS sequence performs a special role in interactions with the chemotaxis receptors in the membrane.
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Affiliation(s)
- Orsolya Láng
- Department of Genetics, Cell and Immunobiology, Semmelweis University, Nagyvárad tér 4, Budapest, 1089, Hungary
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Orbán E, Manea M, Marquadt A, Bánóczi Z, Csík G, Fellinger E, Bosze S, Hudecz F. A new daunomycin-peptide conjugate: synthesis, characterization and the effect on the protein expression profile of HL-60 cells in vitro. Bioconjug Chem 2011; 22:2154-65. [PMID: 21950465 DOI: 10.1021/bc2004236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Daunomycin (Dau) is a DNA-binding antineoplastic agent in the treatment of various types of cancer, such as osteosarcomas and acute myeloid leukemia. One approach to improve its selectivity and to decrease the side effects is the conjugation of Dau with oligopeptide carriers, which might alter the drug uptake and intracellular fate. Here, we report on the synthesis, characterization, and in vitro biological properties of a novel conjugate in which Dau is attached, via an oxime bond, to one of the cancer specific small peptides (LTVSPWY) selected from a random phage peptide library. The in vitro cytostatic effect and cellular uptake of Dau═Aoa-LTVSPWY-NH(2) conjugate were studied on various human cancer cell lines expressing different levels of ErbB2 receptor which could be targeted by the peptide. We found that the new daunomycin-peptide conjugate is highly cytostatic and could be taken up efficiently by the human cancer cells studied. However, the conjugate was less effective than the free drug itself. RP-HPLC data indicate that the conjugate is stable at least for 24 h in the pH 2.5-7.0 range of buffers, as well as in cell culture medium. The conjugate in the presence of rat liver lysosomal homogenate, as indicated by LC-MS analysis, could be degraded. The smallest, Dau-containing metabolite (Dau═Aoa-Leu-OH) identified and prepared expresses DNA-binding ability. In order to get insight on the potential mechanism of action, we compared the protein expression profile of HL-60 human leukemia cells after treatment with the free and peptide conjugated daunomycin. Proteomic analysis suggests that the expression of several proteins has been altered. This includes three proteins, whose expression was lower (tubulin β chain) or markedly higher (proliferating cell nuclear antigen and protein kinase C inhibitor protein 1) after administration of cells with Dau-conjugate vs free drug.
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Affiliation(s)
- Erika Orbán
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, Hungary
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45
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Iobagiu C, Magyar A, Nogueira L, Cornillet M, Sebbag M, Arnaud J, Hudecz F, Serre G. The antigen specificity of the rheumatoid arthritis-associated ACPA directed to citrullinated fibrin is very closely restricted. J Autoimmun 2011; 37:263-72. [PMID: 21872430 DOI: 10.1016/j.jaut.2011.07.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Revised: 07/21/2011] [Accepted: 07/28/2011] [Indexed: 10/17/2022]
Abstract
The major targets of the disease-specific autoantibodies to citrullinated proteins (ACPA) in synovium of rheumatoid arthritis (RA) patients are borne by the citrullinated α- and β-chains of fibrin. We demonstrated that ACPA target a limited set of citrullinated fibrin peptides and particularly four multicitrullinated peptides which present the major epitopes. In this study, we established the clear immunodominance of the peptides α36-50Cit(38,42) and β60-74Cit(60,72,74) which were recognised by 51/81 (63%) and 61/81 (75%) of ACPA-positive patients, respectively, more than 90% recognising one, the other or both peptides. We also identified the citrullyl residues αCit(42), βCit(72) and βCit(74) as essential for antigenicity, and at a lesser degree αCit(38). Then, we assayed on overlapping 7-mer peptides encompassing the sequences of the two peptides, 3 series of sera recognising either α36-50Cit(38,42) or β60-74Cit(60,72,74) or both peptides. In each series, the reactivity profiles of the sera, largely superimposable, allowed identification of the two 4/5-mer overlapping epitopes (α: VECit(42)HQ and α': Cit(38)VVE), and the single 5-mer epitope (β: GYCit(72)ACit(74)), all located to a flexible globular domain of fibrin on a topological 3D model. In conclusion, we demonstrated that only 3 immunodominant epitopes are targeted by ACPA on citrullinated fibrin stressing their actual oligoclonality. However, the reactivity to the 3 epitopes distinguishes three subgroups of patients. The closely restricted antigen specificity suggests that the autoimmune reaction to citrullinated fibrin is antigen-driven. The accessibility of the epitopes reinforces the hypothesis of a pathogenic role for ACPA via immune complexe formation in the synovial tissue.
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Affiliation(s)
- Cristina Iobagiu
- Laboratory of "Epidermis Differentiation and Rheumatoid Autoimmunity", UMR 5165 CNRS-Toulouse III University, Purpan Hospital, Place du Dr Baylac, TSA 40031, 31059 Toulouse cedex 9, France.
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46
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Szarka E, Adori M, Babos F, Magyar A, Hudecz F, Nagy G, Pozsgay J, Sarmay G. Short citrullinated epitope of filaggrin is recognised by sera as well as antibodies produced in vitro by B cells of rheumatoid arthritis patients. Ann Rheum Dis 2011. [DOI: 10.1136/ard.2010.149005.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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47
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Toke O, Bánóczi Z, Király P, Heinzmann R, Bürck J, Ulrich AS, Hudecz F. A kinked antimicrobial peptide from Bombina maxima. I. Three-dimensional structure determined by NMR in membrane-mimicking environments. Eur Biophys J 2011; 40:447-62. [DOI: 10.1007/s00249-010-0657-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 12/09/2010] [Accepted: 12/13/2010] [Indexed: 10/18/2022]
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Szabó R, Bánóczi Z, Mező G, Láng O, Kőhidai L, Hudecz F. Daunomycin-polypeptide conjugates with antitumor activity. Biochimica et Biophysica Acta (BBA) - Biomembranes 2010; 1798:2209-16. [DOI: 10.1016/j.bbamem.2010.07.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 07/11/2010] [Accepted: 07/21/2010] [Indexed: 11/28/2022]
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Bánóczi Z, Gorka-Kereskényi Á, Reményi J, Orbán E, Hazai L, Tökési N, Oláh J, Ovádi J, Béni Z, Háda V, Szántay C, Hudecz F, Kalaus G, Szántay C. Synthesis and in vitro antitumor effect of vinblastine derivative-oligoarginine conjugates. Bioconjug Chem 2010; 21:1948-55. [PMID: 20973492 DOI: 10.1021/bc100028z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Vinblastine is a widely used anticancer drug with undesired side effects. Its conjugation with carrier molecules could be an efficient strategy to reduce these side effects. Besides this, the conjugate could exhibit increased efficiency against resistant cells, e.g., due to the altered internalization pathway. Oligoarginines, as cell-penetrating peptides, can transport covalently attached compounds into different kinds of cells and enhance the efficiency of those compounds. We report here the coupling of vinblastine through its carboxyl group at position 16 with the N-terminal amino function of L-Trp methyl ester. After hydrolysis of the ester group, 17-desacetylvinblastineTrp was conjugated to the N-terminal amino group of oligoarginine via the C-terminal carboxyl group of the Trp moiety in solution. The antitumor effect of conjugates was studied on sensitive and resistant human leukemia (HL-60) cells in vitro. Our data suggest that all conjugates investigated possess an antiproliferative effect against the studied cells. However, the effect was dependent on the number of Arg residues in the conjugates: Arg₈ > Arg₆ ≫ Arg₄. The conjugate with Arg₈ exhibited similar efficicacy as compared with free 17-desacetylvinblastineTrp. The in vitro studies also showed that the tubulin binding ability of vinblastine was essentially preserved even in the octaarginine conjugate. We also observed that two isomers were formed during conjugation. These isomers showed different levels of activity against tubulin polymerization in vitro and in vivo. The 17-desacetylvinblastineTrp-Arg₈-1 isomer conjugate possessed high selectivity against the mitotic spindles. HRMS and NMR data suggest that 17-desacetylvinblastineTrp-Arg₈-1 and 17-desacetylvinblastineTrp-Arg₈-2 are epimers at the tryptophan α carbon atom.
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Szarka E, Babos F, Magyar A, Hudecz F, Nagy G, Sarmay G. Identification of a new citrullinated epitope on filaggrin for the early diagnosis of rheumatoid arthritis. Ann Rheum Dis 2010. [DOI: 10.1136/ard.2010.129577b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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