IgG-Fc glycosylation before and after rituximab treatment in immune thrombocytopenia

The interactions of antibodies with myeloid Fcγ receptors and the complement system are regulated by an Asn297-linked glycan in the Fc portion of IgG. Alterations of serum IgG-Fc glycosylation have been reported in various autoimmune diseases, and correlate with treatment response and disease activi...

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Veröffentlicht in:SCIENTIFIC REPORTS 2020-02, Vol.10 (1), p.3051, Article 3051
Hauptverfasser: Schmidt, David E., de Haan, Noortje, Sonneveld, Myrthe E., Porcelijn, Leendert, van der Schoot, C. Ellen, de Haas, Masja, Zwaginga, Jaap-Jan, Wuhrer, Manfred, Vidarsson, Gestur
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container_title SCIENTIFIC REPORTS
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creator Schmidt, David E.
de Haan, Noortje
Sonneveld, Myrthe E.
Porcelijn, Leendert
van der Schoot, C. Ellen
de Haas, Masja
Zwaginga, Jaap-Jan
Wuhrer, Manfred
Vidarsson, Gestur
description The interactions of antibodies with myeloid Fcγ receptors and the complement system are regulated by an Asn297-linked glycan in the Fc portion of IgG. Alterations of serum IgG-Fc glycosylation have been reported in various autoimmune diseases, and correlate with treatment response and disease activity. We hypothesized that IgG-Fc glycosylation is altered in immune thrombocytopenia (ITP) and associates with response to anti-CD20 monoclonal antibody treatment (rituximab). IgG-Fc glycosylation was analyzed by liquid chromatography-mass spectrometry. We found that IgG-Fc glycosylation was identical between refractory ITP patients (HOVON64 trial; N = 108) and healthy controls (N = 120). Two months after rituximab treatment, we observed a shift in Fc glycosylation, with a mean 1.7% reduction in galactosylation for IgG1 and IgG4 and a mean 1.5% increase for bisection in IgG1, IgG2/3 and IgG4 (adjusted p 
doi_str_mv 10.1038/s41598-020-59651-7
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Ellen ; de Haas, Masja ; Zwaginga, Jaap-Jan ; Wuhrer, Manfred ; Vidarsson, Gestur</creator><creatorcontrib>Schmidt, David E. ; de Haan, Noortje ; Sonneveld, Myrthe E. ; Porcelijn, Leendert ; van der Schoot, C. Ellen ; de Haas, Masja ; Zwaginga, Jaap-Jan ; Wuhrer, Manfred ; Vidarsson, Gestur</creatorcontrib><description>The interactions of antibodies with myeloid Fcγ receptors and the complement system are regulated by an Asn297-linked glycan in the Fc portion of IgG. Alterations of serum IgG-Fc glycosylation have been reported in various autoimmune diseases, and correlate with treatment response and disease activity. We hypothesized that IgG-Fc glycosylation is altered in immune thrombocytopenia (ITP) and associates with response to anti-CD20 monoclonal antibody treatment (rituximab). IgG-Fc glycosylation was analyzed by liquid chromatography-mass spectrometry. We found that IgG-Fc glycosylation was identical between refractory ITP patients (HOVON64 trial; N = 108) and healthy controls (N = 120). Two months after rituximab treatment, we observed a shift in Fc glycosylation, with a mean 1.7% reduction in galactosylation for IgG1 and IgG4 and a mean 1.5% increase for bisection in IgG1, IgG2/3 and IgG4 (adjusted p &lt; 1.7 × 10 −3 and p &lt; 2 × 10 −4 , respectively). Neither baseline nor longitudinal changes in IgG-Fc glycosylation after rituximab were associated with clinical treatment response. We conclude that IgG-Fc glycosylation in refractory ITP is similar to healthy controls and does not predict treatment responses to rituximab. The observed changes two months after treatment suggest that rituximab may influence total serum IgG-Fc glycosylation. 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Ellen</creatorcontrib><creatorcontrib>de Haas, Masja</creatorcontrib><creatorcontrib>Zwaginga, Jaap-Jan</creatorcontrib><creatorcontrib>Wuhrer, Manfred</creatorcontrib><creatorcontrib>Vidarsson, Gestur</creatorcontrib><title>IgG-Fc glycosylation before and after rituximab treatment in immune thrombocytopenia</title><title>SCIENTIFIC REPORTS</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>The interactions of antibodies with myeloid Fcγ receptors and the complement system are regulated by an Asn297-linked glycan in the Fc portion of IgG. Alterations of serum IgG-Fc glycosylation have been reported in various autoimmune diseases, and correlate with treatment response and disease activity. We hypothesized that IgG-Fc glycosylation is altered in immune thrombocytopenia (ITP) and associates with response to anti-CD20 monoclonal antibody treatment (rituximab). IgG-Fc glycosylation was analyzed by liquid chromatography-mass spectrometry. 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Ellen</au><au>de Haas, Masja</au><au>Zwaginga, Jaap-Jan</au><au>Wuhrer, Manfred</au><au>Vidarsson, Gestur</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>IgG-Fc glycosylation before and after rituximab treatment in immune thrombocytopenia</atitle><jtitle>SCIENTIFIC REPORTS</jtitle><stitle>Sci Rep</stitle><addtitle>Sci Rep</addtitle><date>2020-02-20</date><risdate>2020</risdate><volume>10</volume><issue>1</issue><spage>3051</spage><pages>3051-</pages><artnum>3051</artnum><issn>2045-2322</issn><eissn>2045-2322</eissn><abstract>The interactions of antibodies with myeloid Fcγ receptors and the complement system are regulated by an Asn297-linked glycan in the Fc portion of IgG. Alterations of serum IgG-Fc glycosylation have been reported in various autoimmune diseases, and correlate with treatment response and disease activity. We hypothesized that IgG-Fc glycosylation is altered in immune thrombocytopenia (ITP) and associates with response to anti-CD20 monoclonal antibody treatment (rituximab). IgG-Fc glycosylation was analyzed by liquid chromatography-mass spectrometry. We found that IgG-Fc glycosylation was identical between refractory ITP patients (HOVON64 trial; N = 108) and healthy controls (N = 120). Two months after rituximab treatment, we observed a shift in Fc glycosylation, with a mean 1.7% reduction in galactosylation for IgG1 and IgG4 and a mean 1.5% increase for bisection in IgG1, IgG2/3 and IgG4 (adjusted p &lt; 1.7 × 10 −3 and p &lt; 2 × 10 −4 , respectively). Neither baseline nor longitudinal changes in IgG-Fc glycosylation after rituximab were associated with clinical treatment response. We conclude that IgG-Fc glycosylation in refractory ITP is similar to healthy controls and does not predict treatment responses to rituximab. The observed changes two months after treatment suggest that rituximab may influence total serum IgG-Fc glycosylation. Overall, our study suggests that the pathophysiology of refractory ITP may differ from other autoimmune diseases.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>32080262</pmid><doi>10.1038/s41598-020-59651-7</doi><oa>free_for_read</oa></addata></record>
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subjects 631/250/2152/2153/1291
631/250/38
692/308/575
692/4017
Adult
Autoimmune diseases
Case-Control Studies
CD20 antigen
Complement system
Female
Glycosylation
Humanities and Social Sciences
Humans
Idiopathic thrombocytopenic purpura
Immunoglobulin Fc Fragments - metabolism
Immunoglobulin G
Immunoglobulin G - metabolism
Immunotherapy
Liquid chromatography
Male
Mass spectrometry
Mass spectroscopy
Middle Aged
Monoclonal antibodies
multidisciplinary
Purpura, Thrombocytopenic, Idiopathic - drug therapy
Rituximab
Rituximab - pharmacology
Rituximab - therapeutic use
Science
Science (multidisciplinary)
Thrombocytopenia
title IgG-Fc glycosylation before and after rituximab treatment in immune thrombocytopenia
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