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Rheumatoid arthritis (RA) is a complex disease with unknown pathogenesis. In recent years, fewer have paid attention to the broad spectrum of systemic markers of RA. The aim of this study was to identify exosomal candidate proteins in the pathogenesis of RA. Methods. Totally, 12 specimens of plasma from 6 RA patients and 6 age- and gender-matched controls from the Chinese population were obtained for nanoscale liquid chromatography coupled to tandem mass spectrometry (nano-LC-MS\/MS) analysis to identify exosomal profiles. Results. A total of 278 exosomal proteins were detected. Among them, 32 proteins were significantly upregulated (<jats:inline-formula>\n                     <a:math xmlns:a=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\">\n                        <a:mtext>FC<\/a:mtext>\n                        <a:mo>\u2265<\/a:mo>\n                        <a:mn>2.0<\/a:mn>\n                     <\/a:math>\n                  <\/jats:inline-formula> and <jats:inline-formula>\n                     <c:math xmlns:c=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\">\n                        <c:mi>P<\/c:mi>\n                        <c:mo>&lt;<\/c:mo>\n                        <c:mn>0.05<\/c:mn>\n                     <\/c:math>\n                  <\/jats:inline-formula>) and 5 proteins were downregulated (<jats:inline-formula>\n                     <e:math xmlns:e=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M3\">\n                        <e:mtext>FC<\/e:mtext>\n                        <e:mo>\u2264<\/e:mo>\n                        <e:mn>0.5<\/e:mn>\n                     <\/e:math>\n                  <\/jats:inline-formula> and <jats:inline-formula>\n                     <g:math xmlns:g=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M4\">\n                        <g:mi>P<\/g:mi>\n                        <g:mo>&lt;<\/g:mo>\n                        <g:mn>0.05<\/g:mn>\n                     <\/g:math>\n                  <\/jats:inline-formula>). Bioinformatics analysis revealed that transthyretin (TTR), angiotensinogen (AGT), lipopolysaccharide-binding protein (LBP), monocyte differentiation antigen CD14 (CD14), cartilage oligomeric matrix protein (COMP), serum amyloid P (SAP\/APCS), and tenascin (TNC) can interact with each other. Subsequently, these cross-linked proteins may be mainly involved in the inflammatory-related pathways to mediate the onset of RA. Noteworthy, the LBP\/CD14 complex can promote the expression of IL-8 and TNF-\u03b1, eventually leading to the development of RA. Conclusions. Our findings suggest distinct plasmatic exosomal protein profiles in RA patients. These proteins not only take important parts in the vicious circle in the pathogenic process of RA but also serve as novel biomarkers in RA diagnosis and prognosis.<\/jats:p>","DOI":"10.1155\/2021\/9421720","type":"journal-article","created":{"date-parts":[[2021,8,19]],"date-time":"2021-08-19T20:05:39Z","timestamp":1629403539000},"page":"1-11","source":"Crossref","is-referenced-by-count":16,"title":["Systemic Proteomic Analysis Reveals Distinct Exosomal Protein Profiles in Rheumatoid Arthritis"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0033-410X","authenticated-orcid":true,"given":"Qiu","family":"Qin","sequence":"first","affiliation":[{"name":"Department of Endocrinology & Rheumatology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6779-4576","authenticated-orcid":true,"given":"Ronghua","family":"Song","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Rheumatology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Du","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Rheumatology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chaoqun","family":"Gao","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Rheumatology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiuming","family":"Yao","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Rheumatology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2874-3303","authenticated-orcid":true,"given":"Jin-an","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Rheumatology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMra1004965"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.4103\/0974-8237.156044"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.3181\/00379727-68-16375"},{"key":"4","doi-asserted-by":"publisher","DOI":"10.1002\/msc.1108"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.1016\/j.bcp.2011.02.011"},{"key":"6","doi-asserted-by":"publisher","DOI":"10.1016\/j.pharmthera.2017.02.020"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1038\/gt.2017.8"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1007\/s10571-011-9697-y"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.4306\/pi.2015.12.2.249"},{"key":"10","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1016\/j.matbio.2018.02.023","article-title":"Cartilage oligomeric matrix protein: COMP opathies and beyond","volume":"71\u201372","author":"K. 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