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Abou-Zeid L, Pell A, Amaral Saraiva M, Delangle P, Bresson C. Hydrophilic interaction liquid chromatography: An efficient tool for assessing thorium interaction with phosphorylated biomimetic peptides. J Chromatogr A 2024; 1735:465341. [PMID: 39241408 DOI: 10.1016/j.chroma.2024.465341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 09/02/2024] [Accepted: 09/03/2024] [Indexed: 09/09/2024]
Abstract
In the field of nuclear toxicology, the knowledge of the interaction of actinides (An) with biomolecules is of prime concern in order to elucidate their toxicity mechanism and to further develop selective decorporating agents. In this work, we demonstrated the great potential of hydrophilic interaction liquid chromatography (HILIC) to separate polar thorium (Th) biomimetic peptide complexes, as a key starting point to tackle these challenges. Th4+ was used as plutonium (Pu4+) analogue and pS16 and pS1368 as synthetic di- and tetra-phosphorylated peptides capable of mimicking the interaction sites of these An in osteopontin (OPN), a hyperphosphorylated protein. The objective was to determine the relative affinity of pS16 and pS1368 towards Th4+, and to evaluate the pS1368 selectivity when Th4+ was in competition complexation reaction with UO22+ at physiological pH. To meet these aims, HILIC was simultaneously coupled to electrospray ionization mass spectrometry (ESI-MS) and inductively coupled plasma mass spectrometry (ICP-MS), which allowed to identify online the molecular structure of the separated complexes and quantify them, in a single step. Dedicated HILIC conditions were firstly set up to separate the new dimeric Th2(peptide)2 complexes with good separation resolution (peptide = pS16 or pS1368). By adding pS16 and pS1368 in different proportions relatively to Th4+, we found that lower or equal proportions of pS16 with respect to pS1368 were not sufficient to displace pS1368 from Th2pS13682 and pS16 proportion higher than pS1368 led to the formation of a predominant ternary complex Th2(pS16)(pS1368), demonstrating preferential Th4+ binding to the tetra-phosphorylated peptide. Finally, online identification and quantification of the formed complexes when Th4+ and UO22+ were mixed in equimolar ratio relatively to pS1368 showed that in spite of pS1368 has been specifically designed to coordinate UO22+, pS1368 is also Th4+-selective and exhibits stronger affinity for this latter than for UO22+. Hence, the results gathered through this approach highlight the impact of Th4+ coordination chemistry on its interaction with pS1368 and more widely to its affinity for biomolecules.
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Affiliation(s)
- Lana Abou-Zeid
- Université Paris-Saclay, CEA, Service de Physico Chimie, Gif-sur-Yvette F-91191, France; Sorbonne Université, UPMC, Paris F-75005, France
| | - Albert Pell
- Université Paris-Saclay, CEA, Service de Physico Chimie, Gif-sur-Yvette F-91191, France
| | - Marina Amaral Saraiva
- Université Paris-Saclay, CEA, Service de Physico Chimie, Gif-sur-Yvette F-91191, France
| | - Pascale Delangle
- Université Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES, Grenoble 38 000, France
| | - Carole Bresson
- Université Paris-Saclay, CEA, Service de Physico Chimie, Gif-sur-Yvette F-91191, France.
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Abou-Zeid L, Pell A, Garcia-Cortes M, Isnard H, Delangle P, Bresson C. Determining the selectivity of a tetra-phosphorylated biomimetic peptide towards uranium in the presence of competing cations through the simultaneous coupling of HILIC to ESI-MS and ICP-MS. Anal Bioanal Chem 2023; 415:6107-6115. [PMID: 37550545 DOI: 10.1007/s00216-023-04884-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 08/09/2023]
Abstract
A cyclic tetra-phosphorylated biomimetic peptide (pS1368) has been proposed as a promising starting structure to design a decorporating agent of uranyl (UO22+) due to its affinity being similar to that of osteopontin (OPN), a target UO22+ protein in vivo. The determination of this peptide's selectivity towards UO22+ in the presence of competing endogenous elements is also crucial to validate this hypothesis. In this context, the selectivity of pS1368 towards UO22+ in the presence of Ca2+, Cu2+ and Zn2+ was determined by applying the simultaneous coupling of hydrophilic interaction chromatography (HILIC) to electrospray ionization (ESI-MS) and inductively coupled plasma (ICP-MS) mass spectrometry. Sr2+ was used as Ca2+ simulant, providing less challenging ICP-MS measurements. The separation of the complexes by HILIC was first set up. The selectivity of pS1368 towards UO22+ was determined in the presence of Sr2+, by adding several proportions of the latter to UO2(pS1368). UO22+ was not displaced from UO2(pS1368) even in the presence of a ten-fold excess of Sr2+. The same approach has been undertaken to demonstrate the selectivity of pS1368 towards UO22+ in the presence of Cu2+, Zn2+ and Sr2+ as competing endogenous cations. Hence, we showed that pS1368 was selective towards UO22+ in the presence of Sr2+, but also in the presence of Cu2+ and Zn2+. This study highlights the performance of HILIC-ESI-MS/ICP-MS simultaneous coupling to assess the potential of molecules as decorporating agents of UO22+.
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Affiliation(s)
- Lana Abou-Zeid
- Université Paris-Saclay, CEA, Service de Physico-Chimie F-91191, Gif-Sur-Yvette, France
- Sorbonne Université, UPMC, 75005, Paris, France
- Department of Chemistry, Ghent University, Krijgslaan 281-S12, 9000, Ghent, Belgium
| | - Albert Pell
- Université Paris-Saclay, CEA, Service de Physico-Chimie F-91191, Gif-Sur-Yvette, France
| | - Marta Garcia-Cortes
- Université Paris-Saclay, CEA, Service de Physico-Chimie F-91191, Gif-Sur-Yvette, France
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University, Ciudad Universitaria S/N, 28040, Madrid, Spain
| | - Hélène Isnard
- Université Paris-Saclay, CEA, Service de Physico-Chimie F-91191, Gif-Sur-Yvette, France
| | - Pascale Delangle
- Université Grenoble Alpes, CEA, CNRS, GRE-INP, IRIG, SyMMES, 38 000, Grenoble, France
| | - Carole Bresson
- Université Paris-Saclay, CEA, Service de Physico-Chimie F-91191, Gif-Sur-Yvette, France.
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Abou-Zeid L, Pell A, Garcia Cortes M, Isnard H, Delangle P, Bresson C. Determination of the affinity of biomimetic peptides for uranium through the simultaneous coupling of HILIC to ESI-MS and ICP-MS. Anal Chim Acta 2023; 1242:340773. [PMID: 36657886 DOI: 10.1016/j.aca.2022.340773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 12/17/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Several proteins have been identified in the past decades as targets of uranyl (UO22+) in vivo. However, the molecular interactions responsible for this affinity are still poorly known which requires the identification of the UO22+ coordination sites in these proteins. Biomimetic peptides are efficient chemical tools to characterize these sites. In this work, we developed a dedicated analytical method to determine the affinity of biomimetic, synthetic, multi-phosphorylated peptides for UO22+ and evaluate the effect of several structural parameters of these peptides on this affinity at physiological pH. The analytical strategy was based on the implementation of the simultaneous coupling of hydrophilic interaction chromatography (HILIC) with electrospray ionization mass spectrometry (ESI-MS) and inductively coupled plasma mass spectrometry (ICP-MS). An essential step had been devoted to the definition of the best separation conditions of UO22+ complexes formed with di-phosphorylated peptide isomers and also with peptides of different structure and degrees of phosphorylation. We performed the first separations of several sets of UO22+ complexes by HILIC ever reported in the literature. A dedicated method had then been developed for identifying the separated peptide complexes online by ESI-MS and simultaneously quantifying them by ICP-MS, based on uranium quantification using external calibration. Thus, the affinity of the peptides for UO22+ was determined and made it possible to demonstrate that (i) the increasing number of phosphorylated residues (pSer) promotes the affinity of the peptides for UO22+, (ii) the position of the pSer in the peptide backbone has very low impact on this affinity (iii) and finally the cyclic structure of the peptide favors the UO22+ complexation in comparison with the linear structure. These results are in agreement with those previously obtained by spectroscopic techniques, which allowed to validate the method. Through this approach, we obtained essential information to better understand the mechanisms of toxicity of UO22+ at the molecular level and to further develop selective decorporating agents by chelation.
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Affiliation(s)
- Lana Abou-Zeid
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France; Sorbonne Université, UPMC, F-75005, Paris, France
| | - Albert Pell
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France
| | - Marta Garcia Cortes
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France
| | - Hélène Isnard
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, GRE-INP, IRIG, SyMMES, 38 000, Grenoble, France
| | - Carole Bresson
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France.
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Abou Zeid L, Pell A, Tytus T, Delangle P, Bresson C. Separation of multiphosphorylated cyclopeptides and their positional isomers by hydrophilic interaction liquid chromatography (HILIC) coupled to electrospray ionization mass spectrometry (ESI-MS). J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1177:122792. [PMID: 34102536 DOI: 10.1016/j.jchromb.2021.122792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 10/21/2022]
Abstract
Peptides are efficient models used in different fields such as toxicology to study the interactions of several contaminants at the molecular scale, requiring the development of bio-analytical strategies. In this context, Hydrophilic interaction liquid chromatography (HILIC) coupled to electrospray ionization mass spectrometry (ESI-MS) was used to separate synthetic multiphosphorylated cyclopeptides and their positional isomers at physiological pH. We assessed (i) the selectivity of eleven HILIC columns, from different manufacturers and packed with diverse polar sorbents, and (ii) the effect of mobile phase composition on the separation selectivity. The best selectivity and baseline resolution were achieved with the columns grafted by neutral sorbents amide and diol. Furthermore, we investigated the HILIC retention mechanism of these peptides by examining the effect of the number of phosphorylated residues in the peptide scaffold on their retention. The peptide behavior followed the classical hydrophilic partitioning mechanism exclusively on amide and diol columns. This trend was not fully respected on bare and hybrid silica due to the attractive/repulsive interactions of the deprotonated surface silanol groups with the Arginine or Glutamate residues in the peptide scaffold according to the peptide sequence. The position of the phosphorylated amino acid in the peptide backbone also showed to have an impact on the retention, making possible the separation of positional isomers of these multiphosphorylated cyclic peptides using HILIC.
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Affiliation(s)
- Lana Abou Zeid
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191 Gif-sur-Yvette, France; Sorbonne Université, F-75005 Paris, France.
| | - Albert Pell
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191 Gif-sur-Yvette, France
| | - Théo Tytus
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191 Gif-sur-Yvette, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, 38 000 Grenoble, France
| | - Carole Bresson
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191 Gif-sur-Yvette, France
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Luo C, DeStefano JJ, Langlois TJ, Boyes BE, Schuster SA, Godinho JM. Fundamental to achieving fast separations with high efficiency: A review of chromatography with superficially porous particles. Biomed Chromatogr 2021; 35:e5087. [PMID: 33566360 DOI: 10.1002/bmc.5087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/26/2021] [Accepted: 02/05/2021] [Indexed: 01/16/2023]
Abstract
Types of particles have been fundamental to LC separation technology for many years. Originally, LC columns were packed with large-diameter (>100 μm) calcium carbonate, silica gel, or alumina particles that prohibited fast mobile-phase speeds because of the slow diffusion of sample molecules inside deep pores. During the birth of HPLC in the 1960s, superficially porous particles (SPP, ≥30 μm) were developed as the first high-speed stationary-phase support structures commercialized, which permitted faster mobile-phase flowrates due to the fast movement of sample molecules in/out of the thin shells. These initial SPPs were displaced by smaller totally porous particles (TPP) in the mid-1970s. But SPP history repeated when UHPLC emerged in the 2000s. Stationary-phase support structures made from sub-3-μm SPPs were introduced to chromatographers in 2006. The initial purpose of this modern SPP was to enable chromatographers to achieve fast separations with high efficiency using conventional HPLCs. Later, the introduction of sub-2-μm SPPs with UHPLC instruments pushed the separation speed and efficiency to a very fast zone. This review aims at providing readers a comprehensive and up-to-date view on the advantages of SPP materials over TPPs historically and theoretically from the material science angle.
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Affiliation(s)
- Chuping Luo
- Advanced Materials Technology, Inc, Wilmington, Delaware, USA
| | | | | | - Barry E Boyes
- Advanced Materials Technology, Inc, Wilmington, Delaware, USA
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M. Pallares R, Hébert S, Sturzbecher-Hoehne M, Abergel RJ. Chelator-assisted high performance liquid chromatographic separation of trivalent lanthanides and actinides. NEW J CHEM 2021. [DOI: 10.1039/d1nj01966j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
3,4,3-LI(1,2-HOPO) can be used as a HPLC chelating agent, promoting lanthanide and trivalent actinide separation without column modifications.
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Affiliation(s)
- Roger M. Pallares
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Solène Hébert
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | | | - Rebecca J. Abergel
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Nuclear Engineering
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