1
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Des Soye BJ, Melani RD, Hollas MAR, Duan J, Patrie SM, Fisher TD, Mattamana BB, Daud A, Pinelli DF, Ladner DP, Kelleher NL, Forte E. Characterization of the Antibody Response to SARS-CoV-2 Infection in COVID-19 Transplant versus Nontransplant Recipients by Ig-MS. J Proteome Res 2024; 23:3944-3957. [PMID: 39146476 DOI: 10.1021/acs.jproteome.4c00285] [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: 08/17/2024]
Abstract
Solid organ transplant recipients with immunosuppressant regimens to prevent rejection are less able to mount effective immune responses to pathogenic infection. Here, we apply a recently reported mass spectrometry-based serological approach known as Ig-MS to characterize immune responses against infection with SARS-CoV-2 in cohorts of transplant recipients and immunocompetent controls, both at a single early time point following COVID-19 diagnosis as well as over the course of one-month postdiagnosis. We found that the antibody repertoires generated by transplant recipients against SARS-CoV-2 do not differ significantly compared to immunocompetent individuals with regard to repertoire titer, clonality, or glycan composition. Importantly, our study is the first to characterize the evolution of antibody glycan profiles in transplant recipients with COVID-19 disease, presenting evidence that the evolution of glycan composition in these immunocompromised individuals is similar to that in immunocompetent people.
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Affiliation(s)
- Benjamin J Des Soye
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Rafael D Melani
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael A R Hollas
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Jiana Duan
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Steven M Patrie
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Troy D Fisher
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Basil Baby Mattamana
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Amna Daud
- Department of Surgery, Feinberg School of Medicine, Comprehensive Transplant Center, Northwestern University, Chicago, Illinois 60611, United States
| | - David F Pinelli
- Department of Surgery, Feinberg School of Medicine, Comprehensive Transplant Center, Northwestern University, Chicago, Illinois 60611, United States
| | - Daniela P Ladner
- Department of Surgery, Feinberg School of Medicine, Comprehensive Transplant Center, Northwestern University, Chicago, Illinois 60611, United States
| | - Neil L Kelleher
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
| | - Eleonora Forte
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- Department of Surgery, Feinberg School of Medicine, Comprehensive Transplant Center, Northwestern University, Chicago, Illinois 60611, United States
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2
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Des Soye BJ, McGee JP, Hollas MAR, Forte E, Fellers RT, Melani RD, Wilkins JT, Compton PD, Kafader JO, Kelleher NL. Automated Immunoprecipitation, Sample Preparation, and Individual Ion Mass Spectrometry Platform for Proteoforms. Anal Chem 2024. [PMID: 39143757 DOI: 10.1021/acs.analchem.4c01962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
Charge detection mass spectrometry (CDMS) is a well-established technique that provides direct mass spectral outputs regardless of analyte heterogeneity or molecular weight. Over the past few years, it has been demonstrated that CDMS can be multiplexed on Orbitrap analyzers utilizing an integrated approach termed individual ion mass spectrometry (I2MS). To further increase adaptability, robustness, and throughput of this technique, here, we present a method that utilizes numerous integrated equipment components including a Kingfisher system, SampleStream platform, and Q Exactive mass spectrometer to provide a fully automated workflow for immunoprecipitation, sample preparation, injection, and subsequent I2MS acquisition. This automated workflow has been applied to a cohort of 58 test subjects to determine individualized patient antibody responses to SARS-CoV-2 antigens. Results from a range of serum donors include 37 subject I2MS spectra that contained a positive COVID-19 antibody response and 21 I2MS spectra that contained a negative COVID-19 antibody response. This high-throughput automated I2MS workflow can currently process over 100 samples per week and is general for making immunoprecipitation-MS workflows achieve proteoform resolution.
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Affiliation(s)
- Benjamin J Des Soye
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - John P McGee
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- ImmPro, Evanston, Illinois 60201, United States
| | - Michael A R Hollas
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Eleonora Forte
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
| | - Ryan T Fellers
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Rafael D Melani
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - John T Wilkins
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
- Departments of Medicine (Cardiology) and Preventive Medicine (Epidemiology), Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
| | - Philip D Compton
- Integrated Protein Technologies, San Jose, California 95134, United States
| | - Jared O Kafader
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Neil L Kelleher
- Departments of Chemistry and Molecular Biosciences, the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
- Proteomics Center of Excellence, Northwestern University, Evanston, Illinois 60208, United States
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3
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McGee JP, Melani RD, Des Soye B, Croote D, Winton V, Quake SR, Kafader JO, Kelleher NL. Immunocomplexed Antigen Capture and Identification by Native Top-Down Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:2093-2097. [PMID: 37683262 PMCID: PMC10557138 DOI: 10.1021/jasms.3c00235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/26/2023] [Accepted: 09/01/2023] [Indexed: 09/10/2023]
Abstract
Antibody-antigen interactions are central to the immune response. Variation of protein antigens such as isoforms and post-translational modifications can alter their antibody binding sites. To directly connect the recognition of protein antigens with their molecular composition, we probed antibody-antigen complexes by using native tandem mass spectrometry. Specifically, we characterized the prominent peanut allergen Ara h 2 and a convergent IgE variable region discovered in patients who are allergic to peanuts. In addition to measuring the antigen-induced dimerization of IgE antibodies, we demonstrated how immunocomplexes can be isolated in the gas phase and activated to eject, identify, and characterize proteoforms of their bound antigens. Using tandem experiments, we isolated the ejected antigens and then fragmented them to identify their chemical composition. These results establish native top-down mass spectrometry as a viable platform for precise and thorough characterization of immunocomplexes to relate structure to function and enable the discovery of antigen proteoforms and their binding sites.
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Affiliation(s)
- John P. McGee
- Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Rafael D. Melani
- Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Ben Des Soye
- Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Derek Croote
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
| | - Valerie Winton
- Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Stephen R. Quake
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
- Department
of Applied Physics, Stanford University, Stanford, California 94305, United States
| | - Jared O. Kafader
- Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
| | - Neil L. Kelleher
- Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
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4
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Naber A, Demus D, Slieker R, Nicolardi S, Beulens JWJ, Elders PJM, Lieverse AG, Sijbrands EJG, 't Hart LM, Wuhrer M, van Hoek M. Apolipoprotein-CIII O-Glycosylation, a Link between GALNT2 and Plasma Lipids. Int J Mol Sci 2023; 24:14844. [PMID: 37834292 PMCID: PMC10573541 DOI: 10.3390/ijms241914844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/29/2023] [Accepted: 09/30/2023] [Indexed: 10/15/2023] Open
Abstract
Apolipoprotein-CIII (apo-CIII) is involved in triglyceride-rich lipoprotein metabolism and linked to beta-cell damage, insulin resistance, and cardiovascular disease. Apo-CIII exists in four main proteoforms: non-glycosylated (apo-CIII0a), and glycosylated apo-CIII with zero, one, or two sialic acids (apo-CIII0c, apo-CIII1 and apo-CIII2). Our objective is to determine how apo-CIII glycosylation affects lipid traits and type 2 diabetes prevalence, and to investigate the genetic basis of these relations with a genome-wide association study (GWAS) on apo-CIII glycosylation. We conducted GWAS on the four apo-CIII proteoforms in the DiaGene study in people with and without type 2 diabetes (n = 2318). We investigated the relations of the identified genetic loci and apo-CIII glycosylation with lipids and type 2 diabetes. The associations of the genetic variants with lipids were replicated in the Diabetes Care System (n = 5409). Rs4846913-A, in the GALNT2-gene, was associated with decreased apo-CIII0a. This variant was associated with increased high-density lipoprotein cholesterol and decreased triglycerides, while high apo-CIII0a was associated with raised high-density lipoprotein-cholesterol and triglycerides. Rs67086575-G, located in the IFT172-gene, was associated with decreased apo-CIII2 and with hypertriglyceridemia. In line, apo-CIII2 was associated with low triglycerides. On a genome-wide scale, we confirmed that the GALNT2-gene plays a major role i O-glycosylation of apolipoprotein-CIII, with subsequent associations with lipid parameters. We newly identified the IFT172/NRBP1 region, in the literature previously associated with hypertriglyceridemia, as involved in apolipoprotein-CIII sialylation and hypertriglyceridemia. These results link genomics, glycosylation, and lipid metabolism, and represent a key step towards unravelling the importance of O-glycosylation in health and disease.
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Affiliation(s)
- Annemieke Naber
- Department of Internal Medicine, Erasmus MC University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Daniel Demus
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Roderick Slieker
- Department of Cell and Chemical Biology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
- Department of Epidemiology and Data Science, Amsterdam UMC, Location Vrije Universiteit Amsterdam, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Joline W J Beulens
- Department of Epidemiology and Data Science, Amsterdam UMC, Location Vrije Universiteit Amsterdam, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
- Amsterdam Public Health, Amsterdam Cardiovascular Sciences, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - Petra J M Elders
- Department of General Practice, Amsterdam Public Health Institute, Amsterdam UMC, Location VUmc, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Aloysius G Lieverse
- Department of Internal Medicine, Maxima Medical Center, P.O. Box 90052, 5600 PD Eindhoven, The Netherlands
| | - Eric J G Sijbrands
- Department of Internal Medicine, Erasmus MC University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Leen M 't Hart
- Department of Cell and Chemical Biology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
- Department of Epidemiology and Data Science, Amsterdam UMC, Location Vrije Universiteit Amsterdam, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
- Amsterdam Public Health, Amsterdam Cardiovascular Sciences, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Biomedical Data Science, Section Molecular Epidemiology, Leiden University Medical Center, Postal Zone S5-P, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Mandy van Hoek
- Department of Internal Medicine, Erasmus MC University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
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5
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Shao X, Huang Y, Wang G. Microfluidic devices for protein analysis using intact and top‐down mass spectrometry. VIEW 2022. [DOI: 10.1002/viw.20220032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Xinyang Shao
- Institute for Cell Analysis Shenzhen Bay Laboratory Shenzhen China
- Biomedical Pioneering Innovation Center Peking University Beijing China
- Peking‐Tsinghua Center for Life Sciences Peking University Beijing China
| | - Yanyi Huang
- Institute for Cell Analysis Shenzhen Bay Laboratory Shenzhen China
- Biomedical Pioneering Innovation Center Peking University Beijing China
- Peking‐Tsinghua Center for Life Sciences Peking University Beijing China
- College of Chemistry and Molecular Engineering and Beijing National Laboratory for Molecular Sciences Peking University Beijing China
| | - Guanbo Wang
- Institute for Cell Analysis Shenzhen Bay Laboratory Shenzhen China
- Biomedical Pioneering Innovation Center Peking University Beijing China
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6
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McGee JP, Senko MW, Jooß K, Des Soye BJ, Compton PD, Kelleher NL, Kafader JO. Automated Control of Injection Times for Unattended Acquisition of Multiplexed Individual Ion Mass Spectra. Anal Chem 2022; 94:16543-16548. [PMID: 36416365 PMCID: PMC9969899 DOI: 10.1021/acs.analchem.2c03495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Charge detection mass spectrometry (CDMS) provides mass domain spectra of large and highly heterogeneous analytes. Over the past few years, we have multiplexed CDMS on Orbitrap instruments, an approach termed Individual Ion Mass Spectrometry (I2MS). Until now, I2MS required manual adjustment of injection times to collect spectra in the individual ion regime. To increase sample adaptability, enable online separations, and reduce the barrier for entry, we report an automated method for adjusting ion injection times in I2MS for image current detectors like the Orbitrap. Automatic Ion Control (AIC) utilizes the density of signals in the m/z domain to adjust an ensemble of ions down to the individual ion regime in real-time. The AIC technique was applied to both denatured and native proteins yielding high quality data without human intervention directly in the mass domain.
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Affiliation(s)
- John P McGee
- Departments of Chemistry and Molecular Biosciences, Department of Chemical and Biological Engineering, the Chemistry of Life Processes Institute, the Proteomics Center of Excellence at Northwestern University, Evanston, Illinois60208, United States
| | - Michael W Senko
- Thermo Fisher Scientific, San Jose, California95134, United States
| | - Kevin Jooß
- Departments of Chemistry and Molecular Biosciences, Department of Chemical and Biological Engineering, the Chemistry of Life Processes Institute, the Proteomics Center of Excellence at Northwestern University, Evanston, Illinois60208, United States
| | - Benjamin J Des Soye
- Departments of Chemistry and Molecular Biosciences, Department of Chemical and Biological Engineering, the Chemistry of Life Processes Institute, the Proteomics Center of Excellence at Northwestern University, Evanston, Illinois60208, United States
| | - Philip D Compton
- Integrated Protein Technologies, Inc., Evanston, Illinois60201, United States
| | - Neil L Kelleher
- Departments of Chemistry and Molecular Biosciences, Department of Chemical and Biological Engineering, the Chemistry of Life Processes Institute, the Proteomics Center of Excellence at Northwestern University, Evanston, Illinois60208, United States
| | - Jared O Kafader
- Departments of Chemistry and Molecular Biosciences, Department of Chemical and Biological Engineering, the Chemistry of Life Processes Institute, the Proteomics Center of Excellence at Northwestern University, Evanston, Illinois60208, United States
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7
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Gong X, Zhang H, Liu X, Liu Y, Liu J, Fapohunda FO, Lü P, Wang K, Tang M. Is liquid biopsy mature enough for the diagnosis of Alzheimer's disease? Front Aging Neurosci 2022; 14:977999. [PMID: 35992602 PMCID: PMC9389010 DOI: 10.3389/fnagi.2022.977999] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 07/18/2022] [Indexed: 01/10/2023] Open
Abstract
The preclinical diagnosis and clinical practice for Alzheimer's disease (AD) based on liquid biopsy have made great progress in recent years. As liquid biopsy is a fast, low-cost, and easy way to get the phase of AD, continual efforts from intense multidisciplinary studies have been made to move the research tools to routine clinical diagnostics. On one hand, technological breakthroughs have brought new detection methods to the outputs of liquid biopsy to stratify AD cases, resulting in higher accuracy and efficiency of diagnosis. On the other hand, diversiform biofluid biomarkers derived from cerebrospinal fluid (CSF), blood, urine, Saliva, and exosome were screened out and biologically verified. As a result, more detailed knowledge about the molecular pathogenesis of AD was discovered and elucidated. However, to date, how to weigh the reports derived from liquid biopsy for preclinical AD diagnosis is an ongoing question. In this review, we briefly introduce liquid biopsy and the role it plays in research and clinical practice. Then, we summarize the established fluid-based assays of the current state for AD diagnostic such as ELISA, single-molecule array (Simoa), Immunoprecipitation-Mass Spectrometry (IP-MS), liquid chromatography-MS, immunomagnetic reduction (IMR), multimer detection system (MDS). In addition, we give an updated list of fluid biomarkers in the AD research field. Lastly, the current outstanding challenges and the feasibility to use a stand-alone biomarker in the joint diagnostic strategy are discussed.
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Affiliation(s)
- Xun Gong
- Department of Rheumatology and Immunology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Hantao Zhang
- School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Xiaoyan Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Yi Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, China
- Institute of Animal Husbandry, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Junlin Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, China
| | | | - Peng Lü
- School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Kun Wang
- Children’s Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, China
| | - Min Tang
- School of Life Sciences, Jiangsu University, Zhenjiang, China
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8
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Abstract
Apolipoproteins, the protein component of lipoproteins, play an important role in lipid transport, lipoprotein assembly, and receptor recognition. Apolipoproteins are glycosylated and the glycan moieties play an integral role in apolipoprotein function. Changes in apolipoprotein glycosylation correlate with several diseases manifesting in dyslipidemias. Despite their relevance in apolipoprotein function and diseases, the total glycan repertoire of most apolipoproteins remains undefined. This review summarizes the current knowledge and knowledge gaps regarding human apolipoprotein glycan composition, structure, glycosylation site, and functions. Given the relevance of glycosylation to apolipoprotein function, we expect that future studies of apolipoprotein glycosylation will contribute new understanding of disease processes and uncover relevant biomarkers and therapeutic targets. Considering these future efforts, we also provide a brief overview of current mass spectrometry based technologies that can be applied to define detailed glycan structures, site-specific compositions, and the role of emerging approaches for clinical applications in biomarker discovery and personalized medicine.
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9
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Wilkins JT, Rohatgi A. Resolution of apolipoprotein A1 and A2 proteoforms: their cardiometabolic correlates and implications for future research. Curr Opin Lipidol 2022; 33:264-269. [PMID: 36082946 PMCID: PMC10903106 DOI: 10.1097/mol.0000000000000840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW A 'proteoform' is defined as one specific protein structural form that results from the combination of allelic variation, alternative RNA splicing, and/or posttranslational modifications (PTMs) in specific locations on the amino acid backbone. Apolipoproteins A1 and A2 are highly abundant apolipoproteins that mediate HDL structure and function. ApoA1 and apoA2 are known to undergo PTMs, which results in multiple proteoforms. However, the catalogue of apoA1 and apoA2 proteoforms as well as their associations with cardiometabolic health characteristics has not been described until recently. In this brief review, we discuss recent efforts to catalogue the spectrum of apoA1 and apoA2 proteoforms, to understand the relationships between the relative abundance of these proteoforms with cardiometabolic phenotypic characteristics, and we will discuss the implications of these findings to future research. RECENT FINDINGS A broad spectrum of apoA1 and apoA2 proteoforms has been characterized. Although, the types of apoA1 and A2 proteoforms are consistent across individuals, the relative abundances of proteoforms can vary substantially between individuals. Proteoform-specific associations with cardiometabolic characteristics in humans, independent of absolute apolipoprotein abundance, have been described. These recent findings suggest multiple levels of protein structural variation that arise from known and unknown metabolic pathways may be important markers or mediators of cardiometabolic health. SUMMARY Understanding the associations between apolipoprotein proteoforms and phenotype may lead to enhanced understanding of how apolipoproteins mediate lipid metabolism and affect atherosclerotic cardiovascular disease (ASCVD) risk, which may lead to discovery of novel markers of risk and/or key mechanistic insights that may drive further druggable targets for modifying lipid metabolism and reducing ASCVD risk.
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Affiliation(s)
- John T Wilkins
- Division of Cardiology, Department of Medicine
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Anand Rohatgi
- Division of Cardiology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA
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10
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Lefebvre D, Fenaille F, Merda D, Blanco-Valle K, Feraudet-Tarisse C, Simon S, Hennekinne JA, Nia Y, Becher F. Top-Down Mass Spectrometry for Trace Level Quantification of Staphylococcal Enterotoxin A Variants. J Proteome Res 2021; 21:547-556. [PMID: 34968056 DOI: 10.1021/acs.jproteome.1c00886] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We addressed here the need for improved sensitivity of top-down mass spectrometry for identification, differentiation, and absolute quantification of sequence variants of SEA, a bacterial toxin produced by Staphylococcus aureus and regularly involved in food poisoning outbreaks (FPO). We combined immunoaffinity enrichment, a protein internal standard, and optimized acquisition conditions, either by full-scan high-resolution mass spectrometry (HRMS) or multiplex parallel reaction monitoring (PRM) mode. Deconvolution of full-scan HRMS signal and PRM detection of variant-specific fragment ions allowed confident identification of each SEA variant. Summing the PRM signal of variant-common fragment ions was most efficient for absolute quantification, illustrated by a sensitivity down to 2.5 ng/mL and an assay variability below 15%. Additionally, we showed that relative PRM fragment ion abundances constituted a supplementary specificity criterion in top-down quantification. The top-down method was successfully evaluated on a panel of enterotoxin-producing strains isolated during FPO, in parallel to the conventional whole genome sequencing, ELISA, and bottom-up mass spectrometry methods. Top-down provided at the same time correct identification of the SEA variants produced and precise determination of the toxin level. The raw files generated in this study can be found on PASSEL (Peptide Atlas) under data set identifier PASS01710.
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Affiliation(s)
- Donatien Lefebvre
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France.,Laboratory for Food Safety, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université Paris-Est, 94700 Maisons-Alfort, France
| | - François Fenaille
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Déborah Merda
- Laboratory for Food Safety, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université Paris-Est, 94700 Maisons-Alfort, France
| | - Kevin Blanco-Valle
- Laboratory for Food Safety, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université Paris-Est, 94700 Maisons-Alfort, France
| | - Cécile Feraudet-Tarisse
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Stéphanie Simon
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Jacques-Antoine Hennekinne
- Laboratory for Food Safety, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université Paris-Est, 94700 Maisons-Alfort, France
| | - Yacine Nia
- Laboratory for Food Safety, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université Paris-Est, 94700 Maisons-Alfort, France
| | - François Becher
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
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11
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Abstract
The goal of paleoproteomics is to characterize proteins from specimens that have been subjected to the degrading and obscuring effects of time, thus obtaining biological information about tissues or organisms both unobservable in the present and unobtainable through morphological study. Although the description of sequences from Tyrannosaurus rex and Brachylophosaurus canadensis suggested that proteins may persist over tens of millions of years, the majority of paleoproteomic analyses have focused on historical, archeological, or relatively young paleontological samples that rarely exceed 1 million years in age. However, recent advances in methodology and analyses of diverse tissues types (e.g., fossil eggshell, dental enamel) have begun closing the large window of time that remains unexplored in the fossil history of the Cenozoic. In this perspective, we discuss the history and current state of deep time paleoproteomics (DTPp), here defined as paleoproteomic study of samples ∼1 million years (1 Ma) or more in age. We then discuss the future of DTPp research, including what we see as critical ways the field can expand, advancements in technology that can be utilized, and the types of questions DTPp can address if such a future is realized.
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Affiliation(s)
- Elena R Schroeter
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Timothy P Cleland
- Museum Conservation Institute, Smithsonian Institution, Suitland, Maryland 20746, United States
| | - Mary H Schweitzer
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States.,North Carolina Museum of Natural Sciences, Raleigh, North Carolina 27605, United States.,Department of Geology, Lund University, Lund SE-221 00, Sweden
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