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Oh S, Kang WY, Park H, Yang Z, Lee J, Kim C, Woo OH, Hong SJ. Evaluation of deep learning-based quantitative computed tomography for opportunistic osteoporosis screening. Sci Rep 2024; 14:363. [PMID: 38182616 PMCID: PMC10770031 DOI: 10.1038/s41598-023-45824-7] [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: 06/10/2023] [Accepted: 10/24/2023] [Indexed: 01/07/2024] Open
Abstract
To evaluate diagnostic efficacy of deep learning (DL)-based automated bone mineral density (BMD) measurement for opportunistic screening of osteoporosis with routine computed tomography (CT) scans. A DL-based automated quantitative computed tomography (DL-QCT) solution was evaluated with 112 routine clinical CT scans from 84 patients who underwent either chest (N:39), lumbar spine (N:34), or abdominal CT (N:39) scan. The automated BMD measurements (DL-BMD) on L1 and L2 vertebral bodies from DL-QCT were validated with manual BMD (m-BMD) measurement from conventional asynchronous QCT using Pearson's correlation and intraclass correlation. Receiver operating characteristic curve (ROC) analysis identified the diagnostic ability of DL-BMD for low BMD and osteoporosis, determined by dual-energy X-ray absorptiometry (DXA) and m-BMD. Excellent concordance were seen between m-BMD and DL-BMD in total CT scans (r = 0.961/0.979). The ROC-derived AUC of DL-BMD compared to that of central DXA for the low-BMD and osteoporosis patients was 0.847 and 0.770 respectively. The sensitivity, specificity, and accuracy of DL-BMD compared to central DXA for low BMD were 75.0%, 75.0%, and 75.0%, respectively, and those for osteoporosis were 68.0%, 80.5%, and 77.7%. The AUC of DL-BMD compared to the m-BMD for low BMD and osteoporosis diagnosis were 0.990 and 0.943, respectively. The sensitivity, specificity, and accuracy of DL-BMD compared to m-BMD for low BMD were 95.5%, 93.5%, and 94.6%, and those for osteoporosis were 88.2%, 94.5%, and 92.9%, respectively. DL-BMD exhibited excellent agreement with m-BMD on L1 and L2 vertebrae in the various routine clinical CT scans and had comparable diagnostic performance for detecting the low-BMD and osteoporosis on conventional QCT.
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Grants
- grant number S2844049 Ministry of Small and Medium-sized Enterprises (SMEs) and Startups (MSS, Korea)
- NTIS #1425142385 Ministry of Small and Medium-sized Enterprises (SMEs) and Startups (MSS, Korea)
- grant number S2844049 Ministry of Small and Medium-sized Enterprises (SMEs) and Startups (MSS, Korea)
- NTIS #1425142385 Ministry of Small and Medium-sized Enterprises (SMEs) and Startups (MSS, Korea)
- grant number IITP-2023-2020-0-01819 Ministry of Science and ICT, South Korea
- grant number IITP-2023-2020-0-01819 Ministry of Science and ICT, South Korea
- grant number 20010927 Ministry of Trade, Industry and Energy
- NTIS#1415169348 Ministry of Trade, Industry and Energy
- grant number 20010927 Ministry of Trade, Industry and Energy
- NTIS#1415169348 Ministry of Trade, Industry and Energy
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Affiliation(s)
- Sangseok Oh
- Department of Radiology, Guro Hospital, Korea University Medical Center, Korea University College of Medicine, 148, Gurodong-ro, Guro-gu, Seoul, 08308, Republic of Korea
| | - Woo Young Kang
- Department of Radiology, Guro Hospital, Korea University Medical Center, Korea University College of Medicine, 148, Gurodong-ro, Guro-gu, Seoul, 08308, Republic of Korea
| | - Heejun Park
- Department of Radiology, Guro Hospital, Korea University Medical Center, Korea University College of Medicine, 148, Gurodong-ro, Guro-gu, Seoul, 08308, Republic of Korea
| | - Zepa Yang
- Department of Radiology, Guro Hospital, Korea University Medical Center, Korea University College of Medicine, 148, Gurodong-ro, Guro-gu, Seoul, 08308, Republic of Korea
| | - Jemyoung Lee
- ClariPi Inc., Seoul, Republic of Korea
- Department of Applied Bioengineering, Seoul National University, Seoul, Republic of Korea
| | | | - Ok Hee Woo
- Department of Radiology, Guro Hospital, Korea University Medical Center, Korea University College of Medicine, 148, Gurodong-ro, Guro-gu, Seoul, 08308, Republic of Korea.
| | - Suk-Joo Hong
- Department of Radiology, Guro Hospital, Korea University Medical Center, Korea University College of Medicine, 148, Gurodong-ro, Guro-gu, Seoul, 08308, Republic of Korea.
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2
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Rajasekaran S, Soundararajan DCR, Nayagam SM, Tangavel C, Raveendran M, Sri Vijay Anand KS, Shetty AP, Kanna RM. Novel Biomarkers of Health and Degeneration in Human Intervertebral Discs: In-depth Proteomic Analysis of Collagen Framework of Fetal, Healthy, Scoliotic, Degenerate, and Herniated Discs. Asian Spine J 2023; 17:17-29. [PMID: 35421910 PMCID: PMC9977988 DOI: 10.31616/asj.2021.0535] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/03/2022] [Indexed: 11/23/2022] Open
Abstract
STUDY DESIGN Profiling proteins expressed in the nucleus pulposus (NP) of intervertebral discs (IVDs) in five different biological states. PURPOSE To evaluate the molecular complexity of the collagen (COL) framework and its role in the health and disease of human IVDs. OVERVIEW OF LITERATURE Changes in COL composition have been linked to degenerative disk disease (DDD). Despite the fact that humans have 28 different types of COLs, most of the literature focuses solely on COL-1 and COL-2. This study used high-end proteomic technology to examine the entire COL composition of the human IVD across fetal (developmental-FD), normal (healthy-ND), scoliotic (early degeneration-SD), herniated (degenerate-DH), and degenerated (DD) disk phenotypes. METHODS Forty NP tissues were snap-frozen in liquid nitrogen (-196°C) immediately before being subjected to proteomic and bioinformatic analyses from five different disk phenotypes (eight each). RESULTS Tandem mass spectrometric analysis revealed a total of 1,050 proteins in FDs, 1,809 in ND, 1,487 in SD, 1,859 in DH, and 1,538 in the DD group. Of 28 major collagens reported in the human body, this study identified 24 different collagens with 34 subtypes in NP. Fibril-forming collagens (COL-1, 2, and 11A1) and fibril-associated collagens with interrupted triple helices (COL-9A1, 12A1, and 14A1) were abundantly expressed in FDs, representing their role in the development of NP. Multiplexin (COL-15), a hybrid proteoglycan-collagen molecule, was discovered only in FDs. Degeneration was associated with COL2A1 downregulation and COL-10A1 upregulation. CONCLUSIONS COL10 was discovered to be a new biomarker for disk degeneration. Besides COL-1 and 2, other important COLs (6, 9, 11, 12, 14, 15) with anabolic potential and abundant expression in the fetal phenotype could be investigated for tissue engineering and novel DDD therapy.
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Affiliation(s)
| | | | | | | | - Muthuraja Raveendran
- Department of Plant Biotechnology, Tamil Nadu Agricultural University, Coimbatore,
India
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3
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Cyril D, Giugni A, Bangar SS, Mirzaeipoueinak M, Shrivastav D, Sharabi M, Tipper JL, Tavakoli J. Elastic Fibers in the Intervertebral Disc: From Form to Function and toward Regeneration. Int J Mol Sci 2022; 23:8931. [PMID: 36012198 PMCID: PMC9408956 DOI: 10.3390/ijms23168931] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/05/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
Despite extensive efforts over the past 40 years, there is still a significant gap in knowledge of the characteristics of elastic fibers in the intervertebral disc (IVD). More studies are required to clarify the potential contribution of elastic fibers to the IVD (healthy and diseased) function and recommend critical areas for future investigations. On the other hand, current IVD in-vitro models are not true reflections of the complex biological IVD tissue and the role of elastic fibers has often been ignored in developing relevant tissue-engineered scaffolds and realistic computational models. This has affected the progress of IVD studies (tissue engineering solutions, biomechanics, fundamental biology) and translation into clinical practice. Motivated by the current gap, the current review paper presents a comprehensive study (from the early 1980s to 2022) that explores the current understanding of structural (multi-scale hierarchy), biological (development and aging, elastin content, and cell-fiber interaction), and biomechanical properties of the IVD elastic fibers, and provides new insights into future investigations in this domain.
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Affiliation(s)
- Divya Cyril
- Centre for Health Technologies, School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Amelia Giugni
- Centre for Health Technologies, School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Saie Sunil Bangar
- Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Melika Mirzaeipoueinak
- Centre for Health Technologies, School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Dipika Shrivastav
- Centre for Health Technologies, School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Mirit Sharabi
- Department of Mechanical Engineering and Mechatronics, Ariel University, Ariel 407000, Israel
| | - Joanne L. Tipper
- Centre for Health Technologies, School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Javad Tavakoli
- Centre for Health Technologies, School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
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4
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Schulz H, Strauch SM, Richter P, Wehland M, Krüger M, Sahana J, Corydon TJ, Wise P, Baran R, Lebert M, Grimm D. Latest knowledge about changes in the proteome in microgravity. Expert Rev Proteomics 2022; 19:43-59. [PMID: 35037812 DOI: 10.1080/14789450.2022.2030711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
INTRODUCTION : A long-term stay of humans in space causes a large number of well-known health problems and changes in protists and plants. Deep space exploration will increase the time humans or rodents will spend in microgravity (µg). Moreover, they are exposed to cosmic radiation, hypodynamia, and isolation. OMICS investigations will increase our knowledge of the underlying mechanisms of µg-induced alterations in vivo and in vitro. AREAS COVERED : We summarize the findings over the recent 3 years on µg-induced changes in the proteome of protists, plants, rodent and human cells. Considering the thematic orientation of microgravity-related publications in that time frame, we focus on medicine-associated findings such as the µg-induced antibiotic resistance of bacteria, the myocardial consequences of µg-induced calpain activation and the role of MMP13 in osteoarthritis. All these point to the fact that µg is an extreme stressor that could not be evolutionarily addressed on Earth. EXPERT COMMENTARY : In conclusion, when interpreting µg-experiments, the direct, mostly unspecific stress response, must be distinguished from specific µg-effects. For this reason, recent studies often do not consider single protein findings but place them in the context of protein-protein interactions. This enables an estimation of functional relationships, especially if these are supported by epigenetic and transcriptional data (multi-omics).
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Affiliation(s)
- Herbert Schulz
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany.,Research Group 'Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen' (MARS), Otto-von-Guericke University, Magdeburg, Germany
| | - Sebastian M Strauch
- Postgraduate Program in Health and Environment, University of Joinville Region, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89219-710, Brazil
| | - Peter Richter
- Gravitational Biology Group, Department of Biology, Friedrich-Alexander University, Staudtstraße 5, 91058 Erlangen, Germany
| | - Markus Wehland
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany.,Research Group 'Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen' (MARS), Otto-von-Guericke University, Magdeburg, Germany
| | - Marcus Krüger
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany.,Research Group 'Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen' (MARS), Otto-von-Guericke University, Magdeburg, Germany
| | | | - Thomas J Corydon
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark.,Department of Ophthalmology, Aarhus University Hospital, Aarhus C, Denmark
| | - Petra Wise
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany.,The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, Los Angeles, USA
| | - Ronni Baran
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Michael Lebert
- Gravitational Biology Group, Department of Biology, Friedrich-Alexander University, Staudtstraße 5, 91058 Erlangen, Germany.,Space Biology Unlimited SAS, 24 Cours de l'Intendance, 33000 Bordeaux, France
| | - Daniela Grimm
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany.,Research Group 'Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen' (MARS), Otto-von-Guericke University, Magdeburg, Germany.,Department of Biomedicine, Aarhus University, Aarhus C, Denmark
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5
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Rajasekaran S, Soundararajan DCR, Nayagam SM, Tangavel C, Raveendran M, Thippeswamy PB, Djuric N, Anand SV, Shetty AP, Kanna RM. Modic changes are associated with activation of intense inflammatory and host defense response pathways - molecular insights from proteomic analysis of human intervertebral discs. Spine J 2022; 22:19-38. [PMID: 34303868 DOI: 10.1016/j.spinee.2021.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 05/08/2021] [Accepted: 07/02/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Patients with modic changes (MC) form a distinct clinical subset with reports of higher intensity of pain, poor clinical and surgical outcomes and higher incidence of recurrence. MC also is an independent risk factor for increased post-operative surgical site infection. PURPOSE This study aimed to investigate the biological changes at molecular level, in discs with MCs. We also aim to identify biological biomarkers and potential targets for molecular therapy. STUDY DESIGN Experimental analysis MATERIALS AND METHODS: Nucleus pulposus (NP) from 24 patients undergoing microdiscectomy for disc herniation [14 discs with MC and 10 without modic changes (NMC)] were procured. The overall expression of proteins, biological processes, protein-protein and metabolite interactions were analysed and compared. Host defense response proteins (HDRPs) and immunological pathways activated in patients with MC were documented and analysed. RESULTS Label-free proteomic approach with stringent filters revealed a total of 208 proteins in MC and 193 in NMC groups. 45 proteins were specific to MC; 30 to NMC and 163 common to both. Downregulated proteins in MC belonged to components of extracellular matrix such as collagens (COL- 6A1, 6A2, 6A3, 11A1, 12A1, and 20A1), and proteoglycans (versican (VCAN), and biglycan (BGN)). Inflammatory molecules [plasminogen (PLG), angiogenin (ANG), fibroblast growth factor-binding protein 2 (FGFBP2), tetranectin (CLEC3B), cartilage acidic protein 1(CRTAC1), kininogen (KNG-1), chitinase-3-like protein 2 (CHI3L2), and ferritin (FTL) were expressed only in the MC group. The significantly altered pathways in MC included Fc Fragment of IgG Receptor IIIa (FCGR3A)-mediated phagocytosis, regulation of Toll-like receptors (TLR) by endogenous ligand, neutrophil and platelet degranulation. 50 HDRPs were identified in the study, 14 of which were specific to MC and included acute phase reactants, antimicrobial peptides, complement cascade proteins, inflammatory molecule and stress response proteins. Metabolite-protein interaction analysis revealed a significant interaction between 19 proteins, specifically involving ubiquitin mediating proteasome degradative pathway and an association with the metabolite-glutamic acid in the MC group. Accumulation of glutamic acid in MC discs was confirmed by quantitative amino acid analysis using High-performance liquid chromatography. CONCLUSION Our study confirms that MC represents an intense inflammatory status and activation of host defense response and immunological pathways. Downstream effects leading to ubiquitin mediated proteasomal degradation of ECM proteins and the resulting metabolites such as glutamic acid could cause excessive pain and needs further investigation. CLINICAL SIGNIFICANCE We have documented the expression of inflammatory molecules, immune mechanisms and host defense response proteins which throw molecular insights into the pathological mechanisms of MC. Further, ubiquitin mediated proteasomal degradation and accumulation of glutamate in discs with MC might serve as targets for molecular therapy.
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Affiliation(s)
- S Rajasekaran
- Department of Spine Surgery, Ganga Hospital, 313, Mettupalayam road, Coimbatore, India.
| | | | | | - Chitraa Tangavel
- Ganga Research Centre, No 91, Mettupalayam road, Coimbatore 641030, India
| | - M Raveendran
- Department of Plant Biotechnology, Tamil Nadu Agricultural University, Coimbatore 641003 India
| | | | - Niek Djuric
- Department of Neurosurgery, Leiden University Medical Center, Albinusdreef 2, 2300 RC Leiden, the Netherlands
| | - Sri Vijay Anand
- Department of Spine Surgery, Ganga Hospital, 313, Mettupalayam road, Coimbatore, India
| | - Ajoy Prasad Shetty
- Department of Spine Surgery, Ganga Hospital, 313, Mettupalayam road, Coimbatore, India
| | - Rishi Mugesh Kanna
- Department of Spine Surgery, Ganga Hospital, 313, Mettupalayam road, Coimbatore, India
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6
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Yuen JWM, Li KK, Lam TC. Preparation of Hard Tissues Like Bone or Cartilage for Shotgun Mass Spectrometry Analysis of the Proteome. Curr Protoc 2021; 1:e282. [PMID: 34679255 DOI: 10.1002/cpz1.282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Proteomic analyses of intervertebral discs (IVDs) reveal information for understanding the fundamentals of biological processes and pathogenesis but also provide insights for novel pharmaceutical development. Sensitive mass spectrometry techniques and bioinformatics have advanced the detection and identification of proteins from any sample. Due to the challenges of catastrophic sample-loss artifacts during hard-tissue extraction, however, many researchers have omitted the cartilage endplates of IVDs for protein extraction, analyzing only the cellular components of the annulus fibrosus and/or nucleus pulposus. The full proteomic picture of IVDs is compromised without extracting proteins from intact IVDs. Here, we describe a novel preparation method using snap-freeze grinding, which allows for mechanical disruption and customized chemical lysis of hard tissues such as bone or cartilage. This method replaces the time-consuming and insufficient conventional tissue homogenization methods. Sample loss and contamination could be minimized during proteolysis by using an in-solution protein digestion and desalting procedure. We demonstrate excellent proteome coverage with intact mouse IVDs by analyzing samples in a hybrid quadrupole time-of-flight tandem mass spectrometer. © 2021 Wiley Periodicals LLC.
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Affiliation(s)
- John W M Yuen
- School of Nursing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - K K Li
- School of Optometry, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Thomas C Lam
- School of Optometry, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.,Centre for Eye and Vision Research, Hong Kong Science Park, Pak Shek Kok, Hong Kong
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7
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Eckersley A, Ozols M, Chen P, Tam V, Hoyland JA, Trafford A, Chan D, Sherratt MJ. Peptide Location Fingerprinting Reveals Tissue Region-Specific Differences in Protein Structures in an Ageing Human Organ. Int J Mol Sci 2021; 22:10408. [PMID: 34638745 PMCID: PMC8509034 DOI: 10.3390/ijms221910408] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/10/2021] [Accepted: 09/14/2021] [Indexed: 12/18/2022] Open
Abstract
In ageing tissues, long-lived extracellular matrix (ECM) proteins are susceptible to the accumulation of structural damage due to diverse mechanisms including glycation, oxidation and protease cleavage. Peptide location fingerprinting (PLF) is a new mass spectrometry (MS) analysis technique capable of identifying proteins exhibiting structural differences in complex proteomes. PLF applied to published young and aged intervertebral disc (IVD) MS datasets (posterior, lateral and anterior regions of the annulus fibrosus) identified 268 proteins with age-associated structural differences. For several ECM assemblies (collagens I, II and V and aggrecan), these differences were markedly conserved between degeneration-prone (posterior and lateral) and -resistant (anterior) regions. Significant differences in peptide yields, observed within collagen I α2, collagen II α1 and collagen V α1, were located within their triple-helical regions and/or cleaved C-terminal propeptides, indicating potential accumulation of damage and impaired maintenance. Several proteins (collagen V α1, collagen II α1 and aggrecan) also exhibited tissue region (lateral)-specific differences in structure between aged and young samples, suggesting that some ageing mechanisms may act locally within tissues. This study not only reveals possible age-associated differences in ECM protein structures which are tissue-region specific, but also highlights the ability of PLF as a proteomic tool to aid in biomarker discovery.
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Affiliation(s)
- Alexander Eckersley
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, The University of Manchester, Manchester M13 9PT, UK; (M.O.); (J.A.H.)
| | - Matiss Ozols
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, The University of Manchester, Manchester M13 9PT, UK; (M.O.); (J.A.H.)
- Department of Human Genetics, Wellcome Sanger Institute, Genome Campus, Hinxton CB10 1SA, UK
| | - Peikai Chen
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China; (P.C.); (V.T.); (D.C.)
- Department of Orthopaedics and Traumatology, The University of Hong Kong-Shenzhen Hospital (HKU-SZH), Shenzhen 518053, China
| | - Vivian Tam
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China; (P.C.); (V.T.); (D.C.)
| | - Judith A. Hoyland
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, The University of Manchester, Manchester M13 9PT, UK; (M.O.); (J.A.H.)
- NIHR Manchester Biomedical Research Centre, Central Manchester Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9PL, UK
| | - Andrew Trafford
- Manchester Academic Health Science Centre, Division of Cardiovascular Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PL, UK;
| | - Danny Chan
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China; (P.C.); (V.T.); (D.C.)
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, The University of Manchester, Manchester M13 9PT, UK; (M.O.); (J.A.H.)
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8
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Kudelko M, Chen P, Tam V, Zhang Y, Kong OY, Sharma R, Au TY, To MKT, Cheah KS, Chan WC, Chan D. PRIMUS: Comprehensive proteomics of mouse intervertebral discs that inform novel biology and relevance to human disease modelling. Matrix Biol Plus 2021; 12:100082. [PMID: 34409283 PMCID: PMC8361275 DOI: 10.1016/j.mbplus.2021.100082] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/08/2021] [Accepted: 07/15/2021] [Indexed: 12/21/2022] Open
Abstract
Proteomics of healthy mouse IVDs differentiating compartments and spine levels. NP cells feature vacuoles with lysosomal, transport and cell–cell communication functions. Collagen XII, decorin and other ECM proteins contribute to function of the AF. Distinct proteomics between lumbar and tail discs. Mouse is a relevant model for human disc biology but care is needed in its use.
Mice are commonly used to study intervertebral disc (IVD) biology and related diseases such as IVD degeneration. Discs from both the lumbar and tail regions are used. However, little is known about compartmental characteristics in the different regions, nor their relevance to the human setting, where a functional IVD unit depends on a homeostatic proteome. Here, we address these major gaps through comprehensive proteomic profiling and in-depth analyses of 8-week-old healthy murine discs, followed by comparisons with human. Leveraging on a dataset of over 2,700 proteins from 31 proteomic profiles, we identified key molecular and cellular differences between disc compartments and spine levels, but not gender. The nucleus pulposus (NP) and annulus fibrosus (AF) compartments differ the most, both in matrisome and cellularity contents. Differences in the matrisome are consistent with the fibrous nature required for tensile strength in the AF and hydration property in the NP. Novel findings for the NP cells included an enrichment in cell junction proteins for cell–cell communication (Cdh2, Dsp and Gja1) and osmoregulation (Slc12a2 and Wnk1). In NP cells, we detected heterogeneity of vacuolar organelles; where about half have potential lysosomal function (Vamp3, Copb2, Lamp1/2, Lamtor1), some contain lipid droplets and others with undefined contents. The AF is enriched in proteins for the oxidative stress responses (Sod3 and Clu). Interestingly, mitochondrial proteins are elevated in the lumbar than tail IVDs that may reflect differences in metabolic requirement. Relative to the human, cellular and structural information are conserved for the AF. Even though the NP is more divergent between mouse and human, there are similarities at the level of cell biology. Further, common cross-species markers were identified for both NP (KRT8/19, CD109) and AF (COL12A1). Overall, mouse is a relevant model to study IVD biology, and an understanding of the limitation will facilitate research planning and data interpretation, maximizing the translation of research findings to human IVDs.
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Affiliation(s)
- Mateusz Kudelko
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Peikai Chen
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
- Department of Orthopaedics Surgery and Traumatology, The University of Hong Kong -Shenzhen Hospital (HKU-SZH), Shenzhen, China
| | - Vivian Tam
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Ying Zhang
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Oi-Yin Kong
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Rakesh Sharma
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
- Proteomics and Metabolomics Core Facility, The University of Hong Kong, Pokfulam, Hong Kong
| | - Tiffany Y.K. Au
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Michael Kai-Tsun To
- Department of Orthopaedics Surgery and Traumatology, The University of Hong Kong -Shenzhen Hospital (HKU-SZH), Shenzhen, China
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong
| | - Kathryn S.E. Cheah
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Wilson C.W. Chan
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
- Department of Orthopaedics Surgery and Traumatology, The University of Hong Kong -Shenzhen Hospital (HKU-SZH), Shenzhen, China
| | - Danny Chan
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
- Department of Orthopaedics Surgery and Traumatology, The University of Hong Kong -Shenzhen Hospital (HKU-SZH), Shenzhen, China
- Corresponding author at: School of Biomedical Sciences, Faculty of Medicine Building, 21 Sassoon Road, Pokfulam, Hong Kong.
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