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Fretwurst T, Tritschler I, Rothweiler R, Nahles S, Altmann B, Schilling O, Nelson K. Proteomic profiling of human bone from different anatomical sites - A pilot study. Proteomics Clin Appl 2022; 16:e2100049. [PMID: 35462455 DOI: 10.1002/prca.202100049] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 04/11/2022] [Accepted: 04/20/2022] [Indexed: 12/30/2022]
Abstract
PURPOSE The study aim is a comparative proteome-based analysis of different autologous bone entities (alveolar bone [AB], iliac cortical [IC] bone, and iliac spongiosa [IS]) used for alveolar onlay grafting. EXPERIMENTAL DESIGN Site-matched bone samples of AB, IC, and IS were harvested during alveolar onlay grafting. Proteins were extracted using a detergent-based (sodium dodecyl sulfate) strategy and trypsinized. Proteome analysis was performed using liquid chromatography-tandem mass spectrometry (LC-MS/MS). MaxQuant was used for peptide-to-spectrum matching, peak detection, and quantitation. Linear models for microarray analysis (LIMMA) were used to detect differentially abundant peptides and proteins. RESULTS A total of 1730 different proteins were identified across the 15 samples at a false discovery rate of 1%. Partial least-squares discriminant analysis approved segregation of AB, IC, and IS protein profiles. LIMMA statistics highlighted 66 proteins that were more abundant in AB then in IC (vs. 92 proteins were enriched in IC over AB). Gene Ontology enrichment analysis revealed a matrisomal versus an immune-related proteome fingerprint in AB versus IC. CONCLUSION AND CLINICAL RELEVANCE This pilot study demonstrates an ECM protein-related proteome fingerprint in AB and an immune-related proteome fingerprint in IS and IC.
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Affiliation(s)
- Tobias Fretwurst
- Department of Oral- and Craniomaxillofacial Surgery/Translational Implantology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | | | - René Rothweiler
- Department of Oral- and Craniomaxillofacial Surgery/Translational Implantology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Susanne Nahles
- Department of Oral and Maxillofacial Surgery, Berlin Institute of Health, Corporate Member of Freie Universität Berlin, Charité - Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Brigitte Altmann
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,G.E.R.N Center for Tissue Replacement, Regeneration & Neogenesis, Department of Prosthetic Dentistry, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Oliver Schilling
- Institute of Surgical Pathology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Katja Nelson
- Department of Oral- and Craniomaxillofacial Surgery/Translational Implantology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
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Naik AA, Sivaramakrishnan V. Femoral Head Osteonecrosis is associated with thrombosis, fatty acid and cholesterol biosynthesis: A potential role for anti-thrombotics and statins as disease modifying agents. Med Hypotheses 2022. [DOI: 10.1016/j.mehy.2022.110808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Naik AA, Sivaramakrishnan V. Systems analysis of steroid induced osteonecrosis shows role for heme and vitamin D in pathogenesis. GENE REPORTS 2021. [DOI: 10.1016/j.genrep.2021.101383] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Song J, Wu J, Poulet B, Liang J, Bai C, Dang X, Wang K, Fan L, Liu R. Proteomics analysis of hip articular cartilage identifies differentially expressed proteins associated with osteonecrosis of the femoral head. Osteoarthritis Cartilage 2021; 29:1081-1092. [PMID: 33892138 DOI: 10.1016/j.joca.2021.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 03/16/2021] [Accepted: 04/12/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVE The cartilage degeneration that accompanies subchondral bone necrosis plays an important role in the development of osteonecrosis of femoral head (ONFH). To better understand the molecular basis of cartilage degradation in ONFH, we compared the proteomic profiles of ONFH cartilage with that of fracture control. DESIGN Hip cartilage samples were collected from 16 ONFH patients and 16 matched controls with femoral neck fracture. Proteomics analysis was conducted using tandem mass tag-based quantitation technique. Gene ontology (GO) analysis, KEGG pathway and protein-protein interaction analysis were used to investigate the functions of the altered proteins and biological pathways. Differentially expressed proteins including alpha-2-HS-glycoprotein (AHSG) and Cytokine-like protein 1 (Cytl1) were validated by Western blot (WB) and immunohistochemistry (IHC). RESULTS 303 differentially expressed proteins were identified in ONFH cartilage with 72 up-regulated and 231 down-regulated. Collagen turnover, glycosaminoglycan biosynthesis, metabolic pathways, and complement and coagulation cascades were significantly modified in ONFH cartilage. WB and IHC confirmed the increased expression of AHSG and decreased expression of Cytl1 in ONFH cartilage. CONCLUSIONS Our results reveal the implication of altered protein expression in the development of ONFH, and provide novel clues for pathogenesis studies of cartilage degradation in ONFH.
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Affiliation(s)
- J Song
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - J Wu
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China; Department of Orthopaedics, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan Province, 471009, PR China.
| | - B Poulet
- Institute of Ageing and Chronic Disease, University of Liverpool, William Henry Duncan Building, West Derby Road, Liverpool, L7 8TX, UK.
| | - J Liang
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - C Bai
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - X Dang
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - K Wang
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - L Fan
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - R Liu
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China; Institute of Ageing and Chronic Disease, University of Liverpool, William Henry Duncan Building, West Derby Road, Liverpool, L7 8TX, UK.
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Naik AA, Narayanan A, Khanchandani P, Sridharan D, Sukumar P, Srimadh Bhagavatam SK, Seshagiri PB, Sivaramakrishnan V. Systems analysis of avascular necrosis of femoral head using integrative data analysis and literature mining delineates pathways associated with disease. Sci Rep 2020; 10:18099. [PMID: 33093559 PMCID: PMC7581770 DOI: 10.1038/s41598-020-75197-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 10/13/2020] [Indexed: 12/19/2022] Open
Abstract
Avascular necrosis of femoral head (AVNFH) is a debilitating disease, which affects the middle aged population. Though the disease is managed using bisphosphonate, it eventually leads to total hip replacement due to collapse of femoral head. Studies regarding the association of single nucleotide polymorphisms with AVNFH, transcriptomics, proteomics, metabolomics, biophysical, ultrastructural and histopathology have been carried out. Functional validation of SNPs was carried out using literature. An integrated systems analysis using the available datasets might help to gain further insights into the disease process. We have carried out an analysis of transcriptomic data from GEO-database, SNPs associated with AVNFH, proteomic and metabolomic data collected from literature. Based on deficiency of vitamins in AVNFH, an enzyme-cofactor network was generated. The datasets are analyzed using ClueGO and the genes are binned into pathways. Metabolomic datasets are analyzed using MetaboAnalyst. Centrality analysis using CytoNCA on the data sets showed cystathionine beta synthase and methylmalonyl-CoA-mutase to be common to 3 out of 4 datasets. Further, the genes common to at least two data sets were analyzed using DisGeNET, which showed their involvement with various diseases, most of which were risk factors associated with AVNFH. Our analysis shows elevated homocysteine, hypoxia, coagulation, Osteoclast differentiation and endochondral ossification as the major pathways associated with disease which correlated with histopathology, IHC, MRI, Micro-Raman spectroscopy etc. The analysis shows AVNFH to be a multi-systemic disease and provides molecular signatures that are characteristic to the disease process.
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Affiliation(s)
- Ashwin Ashok Naik
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthinilayam, Andhra Pradesh, 515 134, India
| | - Aswath Narayanan
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthinilayam, Andhra Pradesh, 515 134, India
| | - Prakash Khanchandani
- Department of Orthopedics, Sri Sathya Sai Institute of Higher Medical Sciences, Prasanthigram, Andhra Pradesh, 515 134, India.
| | - Divya Sridharan
- Molecular Reproduction and Developmental Genetics, Indian Institute of Science, Bangalore, Bangalore, India
| | - Piruthivi Sukumar
- Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Sai Krishna Srimadh Bhagavatam
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthinilayam, Andhra Pradesh, 515 134, India
| | - Polani B Seshagiri
- Molecular Reproduction and Developmental Genetics, Indian Institute of Science, Bangalore, Bangalore, India
| | - Venketesh Sivaramakrishnan
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthinilayam, Andhra Pradesh, 515 134, India.
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Zhang Y, Bowen TR, Lietman SA, Suk M, Williams MS, Lee MTM. PPARGC1B Is Associated with Nontraumatic Osteonecrosis of the Femoral Head: A Genomewide Association Study on a Chart-Reviewed Cohort. J Bone Joint Surg Am 2020; 102:1628-1636. [PMID: 32701715 DOI: 10.2106/jbjs.19.01335] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Previous studies have demonstrated the influence of heritable factors on the development of nontraumatic osteonecrosis of the femoral head (ONFH). We hypothesized that genetic variation is associated with an increased risk of ONFH, and that variants could be identified by a genomewide association study (GWAS). METHODS Using data collected from the MyCode Community Health Initiative, we identified 118 adult patients with radiographically confirmed nontraumatic ONFH. Study patients were statistically compared with a control population of 56,811 unrelated individuals without a diagnosis of ONFH. A case-control GWAS was performed to identify single nucleotide variants (SNVs) associated with ONFH. Sensitivity analyses were performed to evaluate the association of the top SNVs with (cortico)steroid-associated ONFH and ONFH with femoral head collapse. Gene-based analyses were performed to identify potential causal genes. RESULTS Of the 118 patients, 114 (96.6%) had bilateral ONFH at a median of 5 years of follow-up; 90.7% had at least one 3-week steroid prescription compared with 68.3% in controls. A GWAS identified 4 SNVs reaching genomewide significance. rs116468452 near CACNA1E was significantly associated with ONFH (p = 3.26 × 10, odds ratio [OR] = 5.6, 95% confidence interval [CI] = 3.21 to 9.76). rs10953090 in SAMD9 was significantly associated with ONFH in the steroid-exposed subset (p = 2.96 × 10, OR = 2.57, 95% CI = 1.84 to 3.58). rs112467115 in PI4K1B showed enhanced association in the collapsed subset (p = 7.82 × 10, OR = 4.5, 95% CI = 2.60 to 7.79). Gene-based analyses identified PPARGC1B as the only gene significantly associated with ONFH after Bonferroni correction (p = 1 × 10), with the lead SNV being rs78814834 (OR = 2.86, 95% CI = 1.87 to 4.38). CONCLUSIONS We identified 4 SNVs and 1 gene, PPARGC1B, associated with ONFH. LEVEL OF EVIDENCE Prognostic Level IV. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Yanfei Zhang
- Genomic Medicine Institute, Geisinger, Danville, Pennsylvania.,Musculoskeletal Institute, Geisinger, Danville, Pennsylvania
| | - Thomas R Bowen
- Musculoskeletal Institute, Geisinger, Danville, Pennsylvania
| | | | - Michael Suk
- Musculoskeletal Institute, Geisinger, Danville, Pennsylvania
| | - Marc S Williams
- Genomic Medicine Institute, Geisinger, Danville, Pennsylvania
| | - Ming Ta Michael Lee
- Genomic Medicine Institute, Geisinger, Danville, Pennsylvania.,Musculoskeletal Institute, Geisinger, Danville, Pennsylvania
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Liu X, Li Q, Sheng J, Hu B, Zhu Z, Zhou S, Yin J, Gong Q, Wang Y, Zhang C. Unique plasma metabolomic signature of osteonecrosis of the femoral head. J Orthop Res 2016; 34:1158-67. [PMID: 26662932 DOI: 10.1002/jor.23129] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 12/08/2015] [Indexed: 02/04/2023]
Abstract
Metabolomic analysis was performed to determine the metabolomic signature of osteonecrosis of the femoral head (ONFH), and to investigate the underlying relationship between the metabolomic signature and the pathogenesis of ONFH. Plasma samples were collected from 30 ONFH patients and 30 normal subjects. The global metabolomic profile was obtained through a combination of high-throughput liquid- and gas-chromatography-based mass spectrometry analyses. All statistical analyses were conducted using the R software. The results showed clear differences in the metabolomic signature between the plasma of ONFH patients compared with normal subjects. Among the 354 identified metabolites, the expression of 123 metabolites were significantly changed in ONFH patients compared with normal subjects (p < 0.05, q < 0.10). Bioinformatics analysis revealed that these abnormal metabolites were mainly involved in lipid-, glutathione-, nucleotide-, and energy-associated pathways, which might be related to enhanced inflammation, oxidative stress, and energy deficiency due to ONFH. This study provides the first metabolomic analysis of ONFH, and identifies a previously unrecognized metabolic signature in ONFH plasma. The results offer new insights into the pathological mechanisms of ONFH through its influence on metabolic pathways, providing the requisite framework for identifying biomarkers or novel targets for therapeutic intervention. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:1158-1167, 2016.
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Affiliation(s)
- Xiaolin Liu
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Qing Li
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Jiagen Sheng
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China.,Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Bin Hu
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Zhenzhong Zhu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Shumin Zhou
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Junhui Yin
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Qiang Gong
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Yang Wang
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
| | - Changqing Zhang
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China.,Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, Shanghai, 200233, China
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8
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Liu R, Fan L, Yin L, Wang K, Miao W, Song Q, Dang X, Gao H, Bai C. Comparative study of serum proteomes in Legg-Calve-Perthes disease. BMC Musculoskelet Disord 2015; 16:281. [PMID: 26438379 PMCID: PMC4595068 DOI: 10.1186/s12891-015-0730-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 09/21/2015] [Indexed: 12/12/2022] Open
Abstract
Background Legg-Calve-Perthes Disease (LCPD) is an idiopathic osteonecrosis of the developing femoral head complicated by pain and disability of the hip joint. To date, the pathological mechanisms of LCPD are not well-known. This study screened the changes in serum protein expression in patients with LCPD. Methods Age- and sex-matched serum samples from 10 control subjects and 10 patients with LCPD were compared using the isobaric tags for relative and absolute quantification (iTRAQ) technique. Gene ontology analyses, KEGG pathway and functional network analyses were performed. Proteins of interest with large differences in expression, S100-A8, alpha-1-acid glycoprotein 1, haptoglobin and apolipoprotein E, were compared by western blotting. Results The disease/control ratios showed 26 proteins were significantly differentially expressed (all p < 0.05). Including higher abundances of complement factor H (1.44), complement C4-B (1.45), isocitrate dehydrogenase [NAD] subunit alpha (2.7) alpha-1-acid glycoprotein 1 (1.87), heptoglobin (1.53) and Ig lambda-2 chain C regions (1.46), and lower levels of apolipoprotein E (0.50), apolipoprotein F (0.60), apolipoprotein C-III (0.69), S100-A8 (0.73), S100-A9 (0.75) and prothrombin (0.77) in LCPD than in controls. The alpha-1-acid glycoprotein 1 and haptoglobin increases, and apolipoprotein E and S100-A8 decreases were confirmed by western blot. KEGG pathway analysis revealed these proteins were related to the complement and coagulation cascades, Staphylococcus aureus infection, PPAR signaling, fat digestion and absorption, and vitamin digestion and absorption. Functional network analysis suggested that the proteins were involved in lipid regulation. Conclusions The complement and coagulation cascades, and abnormal lipid metabolism may be involved in the pathogenesis of LCPD.
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Affiliation(s)
- Ruiyu Liu
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
| | - Lihong Fan
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
| | - Longbin Yin
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
| | - Kunzheng Wang
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
| | - Wusheng Miao
- Department of Pediatric Orthopaedic, Hong-Hui Hospital, Medical College of Xi'an Jiaotong University, No. 76 Nanguo Road, Nanshao Men, Beilin District, Xi'an, 710054, P. R China.
| | - Qichun Song
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
| | - Xiaoqian Dang
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
| | - Hang Gao
- Research Center for Proteome Analysis, Shanghai Institutes for Biological5 Sciences, Chinese Academy of Sciences, Shanghai, P. R China.
| | - Chuanyi Bai
- Department of Orthopaedic, the Second Hospital Affilicated to Medical College, Xi'an Jiaotong University, No.157, Xiwu Road, Xi'an, Shaanxi, 710004, P. R China.
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Abstract
The aim of this review was to provide information about the variety of thrombophilic and hypofibrinolytic markers that are possible risk factors for the development of osteonecrosis and bone marrow edema syndrome. A total of 48 parameters were identified in 45 studies that included 2163 patients. The most frequently reported laboratory findings included altered serum concentrations of lipoproteins, decreased concentration and function of fibrinolytic agents, increased levels of thrombophilic markers, and several single nucleotide polymorphisms. Despite inhomogeneities in reported parameters, results, patients' collectives, and treatment strategies, these data suggest that coagulation abnormalities may play an important role in the emergence of osteonecrosis and bone marrow edema syndrome.
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Affiliation(s)
- Patrick Orth
- Department of Orthopaedic Surgery, Saarland University Medical Center, Homburg, Saar, Germany
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Zhang Y, Yao K, Yu Y, Ni S, Zhang L, Wang W, Lai K. Effects of 1.8 GHz radiofrequency radiation on protein expression in human lens epithelial cells. Hum Exp Toxicol 2013; 32:797-806. [PMID: 23338683 DOI: 10.1177/0960327112472353] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The aim of the present study was to observe the effects of 1.8 GHz radiofrequency (RF) radiation on the protein expression of human lens epithelial cells (hLECs) in vitro. METHODS The hLECs were exposed and sham-exposed to 1.8 GHz RF radiation (specific absorption rate (SAR) of 4 W/kg) for 2 h. After exposure, the proteins extracted from LECs were loaded on the Ettan MDLC system connected to the LTQ-Orbitrap MS for screening the candidate protein biomarkers induced by RF. The quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect the levels of messenger RNA of candidate biomarkers. After the hLECs were exposed to 1.8 GHz RF (SAR of 2, 3 and 4 W/kg) for 2 h, the Western blot assay was utilized to measure the expression levels of the above-screened candidate protein biomarkers. RESULTS The results of shotgun proteomic analysis indicated that there were eight proteins with differential expression between exposure and sham exposure groups. The results of qRT-PCR showed that there were three genes with expressional differences (valosin containing protein (VCP), ubiquitin specific peptidase 35 (USP35) and signal recognition particle 68 kDa (SRP68)) between exposure and sham exposure groups. The results of Western blot assay exhibited that the expressional levels of VCP and USP35 proteins significantly increased and the expressional level of protein SRP68 significantly decreased in hLECs exposed to 1.8 GHz RF radiation (SAR of 3 and 4 W/kg) for 2 h when compared with the corresponding sham groups (p < 0.05). CONCLUSION The shotgun proteomics technique can be applied to screen the proteins with differential expression between hLECs exposed to 1.8 GHz RF and hLECs sham-exposed to 1.8 GHz RF, and three protein biomarkers associated with RF radiation were validated by Western blot assay.
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Affiliation(s)
- Y Zhang
- Eye Center, Affiliated Second Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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