1
|
Abad P, Coronado M, Vincelle-Nieto Á, Pérez-Benavente S, Fobil JN, Puyet A, Diez A, Reyes-Palomares A, Azcárate IG, Bautista JM. Shotgun Characterization of the Circulating IgM Antigenome of an Infectious Pathogen by Immunocapture-LC-MS/MS from Dried Serum Spots. J Proteome Res 2024; 23:633-643. [PMID: 38183416 DOI: 10.1021/acs.jproteome.3c00439] [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] [Indexed: 01/08/2024]
Abstract
One of the main challenges in compiling the complete collection of protein antigens from pathogens for the selection of vaccine candidates or intervention targets is to acquire a broad enough representation of them to be recognized by the highly diversified immunoglobulin repertoire in human populations. Dried serum spot sampling (DSS) retains a large repertoire of circulating immunoglobulins from each individual that can be representative of a population, according to the sample size. In this work, shotgun proteomics of an infectious pathogen based on DSS sampling coupled with IgM immunoprecipitation, liquid chromatography-mass spectrometry (LC-MS/MS), and bioinformatic analyses was combined to characterize the circulating IgM antigenome. Serum samples from a malaria endemic region at different clinical statuses were studied to optimize IgM binding efficiency and antibody leaching by varying serum/immunomagnetic bead ratios and elution conditions. The method was validated using Plasmodium falciparum extracts identifying 110 of its IgM-reactive antigens while minimizing the presence of human proteins and antibodies. Furthermore, the IgM antigen recognition profile differentiated between malaria-infected and noninfected individuals at the time of sampling. We conclude that a shotgun proteomics approach offers advantages in providing a high-throughput, reliable, and clean way to identify IgM-recognized antigens from trace amounts of serum. The mass spectrometry raw data and metadata have been deposited with ProteomeXchange via MassIVE with the PXD identifier PXD043800.
Collapse
Affiliation(s)
- Paloma Abad
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
| | - Montserrat Coronado
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
| | - África Vincelle-Nieto
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
| | - Susana Pérez-Benavente
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
| | - Julius N Fobil
- Department of Biological, Environmental & Occupational Health Sciences, School of Public Health, College of Health Sciences, University of Ghana, P.O. Box LG 13, G-4381 Legon, Ghana
| | - Antonio Puyet
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
- 12 de Octubre Health Research Institute (imas12), 28041 Madrid, Spain
| | - Amalia Diez
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
- 12 de Octubre Health Research Institute (imas12), 28041 Madrid, Spain
| | - Armando Reyes-Palomares
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
- 12 de Octubre Health Research Institute (imas12), 28041 Madrid, Spain
| | - Isabel G Azcárate
- Faculty of Health Sciences, Rey Juan Carlos University, Alcorcón, 28922 Madrid, Spain
| | - José M Bautista
- Department of Biochemistry and Molecular Biology, Universidad Complutense de Madrid, Faculty of Veterinary Sciences, 28040 Madrid, Spain
- 12 de Octubre Health Research Institute (imas12), 28041 Madrid, Spain
| |
Collapse
|
2
|
Dome K, Akimenko Z, Bychkov A, Kalambet Y, Lomovsky O. On the Applicability of Electrophoresis for Protein Quantification. Polymers (Basel) 2021; 13:polym13223971. [PMID: 34833270 PMCID: PMC8625784 DOI: 10.3390/polym13223971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/09/2021] [Accepted: 11/09/2021] [Indexed: 11/22/2022] Open
Abstract
Polyacrylamide gel electrophoresis is widely used for studying proteins and protein-containing objects. However, it is employed most frequently as a qualitative method rather than a quantitative one. This paper shows the feasibility of routine digital image acquisition and mathematical processing of electropherograms for protein quantification when using vertical gel electrophoresis and Chrom & Spec software. Both the well-studied model protein molecules (bovine serum albumin) and more complex real-world protein-based products (casein-containing isolate for sports nutrition), which were subjected to mechanical activation in a planetary ball mill to obtain samples characterized by different protein denaturation degrees, were used as study objects. Protein quantification in the mechanically activated samples was carried out. The degree of destruction of individual protein was shown to be higher compared to that of the protein-containing mixture after mechanical treatment for an identical amount of time. The methodological approach used in this study can serve as guidance for other researchers who would like to use electrophoresis for protein quantification both in individual form and in protein mixtures. The findings prove that photographic imaging of gels followed by mathematical data processing can be applied for analyzing the electrophoretic data as an affordable, convenient and quick tool.
Collapse
Affiliation(s)
- Karina Dome
- Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 630128 Novosibirsk, Russia; (Z.A.); (A.B.); (O.L.)
- Correspondence: ; Tel.: +79-(60)-7908772
| | - Zoya Akimenko
- Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 630128 Novosibirsk, Russia; (Z.A.); (A.B.); (O.L.)
| | - Aleksey Bychkov
- Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 630128 Novosibirsk, Russia; (Z.A.); (A.B.); (O.L.)
- Department of Business, Novosibirsk State Technical University, 630073 Novosibirsk, Russia
| | | | - Oleg Lomovsky
- Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 630128 Novosibirsk, Russia; (Z.A.); (A.B.); (O.L.)
| |
Collapse
|