Epratuzumab targeting of CD22 affects adhesion molecule expression and migration of B-cells in systemic lupus erythematosus
Epratuzumab, a humanized anti-CD22 monoclonal antibody, is under investigation as a therapeutic antibody in non-Hodgkin's lymphoma and systemic lupus erythematosus (SLE), but its mechanism of action on B-cells remains elusive. Treatment of SLE patients with epratuzumab leads to a reduction of c...
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| Veröffentlicht in: | Arthritis research & therapy 2010-01, Vol.12 (6), p.R204-R204, Article R204 |
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| creator | Daridon, Capucine Blassfeld, Daniela Reiter, Karin Mei, Henrik E Giesecke, Claudia Goldenberg, David M Hansen, Arne Hostmann, Arwed Frölich, Daniela Dörner, Thomas |
| description | Epratuzumab, a humanized anti-CD22 monoclonal antibody, is under investigation as a therapeutic antibody in non-Hodgkin's lymphoma and systemic lupus erythematosus (SLE), but its mechanism of action on B-cells remains elusive. Treatment of SLE patients with epratuzumab leads to a reduction of circulating CD27(negative) B-cells, although epratuzumab is weakly cytotoxic to B-cells in vitro. Therefore, potential effects of epratuzumab on adhesion molecule expression and the migration of B-cells have been evaluated.
Epratuzumab binding specificity and the surface expression of adhesion molecules (CD62L, β7 integrin and β1 integrin) after culture with epratuzumab was studied on B-cell subsets of SLE patients by flow cytometry. In addition, in vitro transwell migration assays were performed to analyze the effects of epratuzumab on migration towards different chemokines such as CXCL12, CXCL13 or to CXCR3 ligands, and to assess the functional consequences of altered adhesion molecule expression.
Epratuzumab binding was considerably higher on B-cells relative to other cell types assessed. No binding of epratuzumab was observed on T-cells, while weak non-specific binding of epratuzumab on monocytes was noted. On B-cells, binding of epratuzumab was particularly enhanced on CD27(negative) B-cells compared to CD27(positive) B-cells, primarily related to a higher expression of CD22 on CD27(negative) B-cells. Moreover, epratuzumab binding led to a decrease in the cell surface expression of CD62L and β7 integrin, while the expression of β1 integrin was enhanced. The effects on the pattern of adhesion molecule expression observed with epratuzumab were principally confined to a fraction of the CD27(negative) B-cell subpopulation and were associated with enhanced spontaneous migration of B-cells. Furthermore, epratuzumab also enhanced the migration of CD27(negative) B-cells towards the chemokine CXCL12.
The current data suggest that epratuzumab has effects on the expression of the adhesion molecules CD62L, β7 integrin and β1 integrin as well as on migration towards CXCL12, primarily of CD27(negative) B-cells. Therefore, induced changes in migration appear to be part of the mechanism of action of epratuzumab and are consistent with the observation that CD27(negative) B-cells were found to be preferentially reduced in the peripheral blood under treatment. |
| doi_str_mv | 10.1186/ar3179 |
| format | Article |
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Epratuzumab binding specificity and the surface expression of adhesion molecules (CD62L, β7 integrin and β1 integrin) after culture with epratuzumab was studied on B-cell subsets of SLE patients by flow cytometry. In addition, in vitro transwell migration assays were performed to analyze the effects of epratuzumab on migration towards different chemokines such as CXCL12, CXCL13 or to CXCR3 ligands, and to assess the functional consequences of altered adhesion molecule expression.
Epratuzumab binding was considerably higher on B-cells relative to other cell types assessed. No binding of epratuzumab was observed on T-cells, while weak non-specific binding of epratuzumab on monocytes was noted. On B-cells, binding of epratuzumab was particularly enhanced on CD27(negative) B-cells compared to CD27(positive) B-cells, primarily related to a higher expression of CD22 on CD27(negative) B-cells. Moreover, epratuzumab binding led to a decrease in the cell surface expression of CD62L and β7 integrin, while the expression of β1 integrin was enhanced. The effects on the pattern of adhesion molecule expression observed with epratuzumab were principally confined to a fraction of the CD27(negative) B-cell subpopulation and were associated with enhanced spontaneous migration of B-cells. Furthermore, epratuzumab also enhanced the migration of CD27(negative) B-cells towards the chemokine CXCL12.
The current data suggest that epratuzumab has effects on the expression of the adhesion molecules CD62L, β7 integrin and β1 integrin as well as on migration towards CXCL12, primarily of CD27(negative) B-cells. Therefore, induced changes in migration appear to be part of the mechanism of action of epratuzumab and are consistent with the observation that CD27(negative) B-cells were found to be preferentially reduced in the peripheral blood under treatment.</description><identifier>ISSN: 1478-6354</identifier><identifier>EISSN: 1478-6362</identifier><identifier>EISSN: 1478-6354</identifier><identifier>DOI: 10.1186/ar3179</identifier><identifier>PMID: 21050432</identifier><language>eng</language><publisher>England: BioMed Central Ltd</publisher><subject>Adult ; Antibodies, Monoclonal - pharmacology ; Antibodies, Monoclonal, Humanized ; B cells ; B-Lymphocytes - cytology ; B-Lymphocytes - drug effects ; B-Lymphocytes - immunology ; B-Lymphocytes - metabolism ; Cell adhesion molecules ; Cell Adhesion Molecules - biosynthesis ; Cell Adhesion Molecules - drug effects ; Cell Adhesion Molecules - immunology ; Cell migration ; Cell Movement ; Cell Separation ; Chemotaxis, Leukocyte - drug effects ; Complications and side effects ; Dosage and administration ; Drug targeting ; Drug therapy ; Female ; Flow Cytometry ; Humans ; Integrin beta Chains - biosynthesis ; Integrin beta1 - biosynthesis ; L-Selectin - biosynthesis ; Lupus Erythematosus, Systemic - immunology ; Lupus Erythematosus, Systemic - metabolism ; Male ; Monoclonal antibodies ; Physiological aspects ; Sialic Acid Binding Ig-like Lectin 2 - metabolism ; Systemic lupus erythematosus</subject><ispartof>Arthritis research & therapy, 2010-01, Vol.12 (6), p.R204-R204, Article R204</ispartof><rights>COPYRIGHT 2010 BioMed Central Ltd.</rights><rights>Copyright ©2010 Daridon et al.; licensee BioMed Central Ltd. 2010 Daridon et al.; licensee BioMed Central Ltd.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c530t-79059d045a7ae401a3091e1b65815bdb562ae233a379867523c18992ec430b083</citedby><cites>FETCH-LOGICAL-c530t-79059d045a7ae401a3091e1b65815bdb562ae233a379867523c18992ec430b083</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3046510/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3046510/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,27901,27902,53766,53768</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21050432$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Daridon, Capucine</creatorcontrib><creatorcontrib>Blassfeld, Daniela</creatorcontrib><creatorcontrib>Reiter, Karin</creatorcontrib><creatorcontrib>Mei, Henrik E</creatorcontrib><creatorcontrib>Giesecke, Claudia</creatorcontrib><creatorcontrib>Goldenberg, David M</creatorcontrib><creatorcontrib>Hansen, Arne</creatorcontrib><creatorcontrib>Hostmann, Arwed</creatorcontrib><creatorcontrib>Frölich, Daniela</creatorcontrib><creatorcontrib>Dörner, Thomas</creatorcontrib><title>Epratuzumab targeting of CD22 affects adhesion molecule expression and migration of B-cells in systemic lupus erythematosus</title><title>Arthritis research & therapy</title><addtitle>Arthritis Res Ther</addtitle><description>Epratuzumab, a humanized anti-CD22 monoclonal antibody, is under investigation as a therapeutic antibody in non-Hodgkin's lymphoma and systemic lupus erythematosus (SLE), but its mechanism of action on B-cells remains elusive. Treatment of SLE patients with epratuzumab leads to a reduction of circulating CD27(negative) B-cells, although epratuzumab is weakly cytotoxic to B-cells in vitro. Therefore, potential effects of epratuzumab on adhesion molecule expression and the migration of B-cells have been evaluated.
Epratuzumab binding specificity and the surface expression of adhesion molecules (CD62L, β7 integrin and β1 integrin) after culture with epratuzumab was studied on B-cell subsets of SLE patients by flow cytometry. In addition, in vitro transwell migration assays were performed to analyze the effects of epratuzumab on migration towards different chemokines such as CXCL12, CXCL13 or to CXCR3 ligands, and to assess the functional consequences of altered adhesion molecule expression.
Epratuzumab binding was considerably higher on B-cells relative to other cell types assessed. No binding of epratuzumab was observed on T-cells, while weak non-specific binding of epratuzumab on monocytes was noted. On B-cells, binding of epratuzumab was particularly enhanced on CD27(negative) B-cells compared to CD27(positive) B-cells, primarily related to a higher expression of CD22 on CD27(negative) B-cells. Moreover, epratuzumab binding led to a decrease in the cell surface expression of CD62L and β7 integrin, while the expression of β1 integrin was enhanced. The effects on the pattern of adhesion molecule expression observed with epratuzumab were principally confined to a fraction of the CD27(negative) B-cell subpopulation and were associated with enhanced spontaneous migration of B-cells. Furthermore, epratuzumab also enhanced the migration of CD27(negative) B-cells towards the chemokine CXCL12.
The current data suggest that epratuzumab has effects on the expression of the adhesion molecules CD62L, β7 integrin and β1 integrin as well as on migration towards CXCL12, primarily of CD27(negative) B-cells. Therefore, induced changes in migration appear to be part of the mechanism of action of epratuzumab and are consistent with the observation that CD27(negative) B-cells were found to be preferentially reduced in the peripheral blood under treatment.</description><subject>Adult</subject><subject>Antibodies, Monoclonal - pharmacology</subject><subject>Antibodies, Monoclonal, Humanized</subject><subject>B cells</subject><subject>B-Lymphocytes - cytology</subject><subject>B-Lymphocytes - drug effects</subject><subject>B-Lymphocytes - immunology</subject><subject>B-Lymphocytes - metabolism</subject><subject>Cell adhesion molecules</subject><subject>Cell Adhesion Molecules - biosynthesis</subject><subject>Cell Adhesion Molecules - drug effects</subject><subject>Cell Adhesion Molecules - immunology</subject><subject>Cell migration</subject><subject>Cell Movement</subject><subject>Cell Separation</subject><subject>Chemotaxis, Leukocyte - drug effects</subject><subject>Complications and side effects</subject><subject>Dosage and administration</subject><subject>Drug targeting</subject><subject>Drug therapy</subject><subject>Female</subject><subject>Flow Cytometry</subject><subject>Humans</subject><subject>Integrin beta Chains - biosynthesis</subject><subject>Integrin beta1 - biosynthesis</subject><subject>L-Selectin - biosynthesis</subject><subject>Lupus Erythematosus, Systemic - immunology</subject><subject>Lupus Erythematosus, Systemic - metabolism</subject><subject>Male</subject><subject>Monoclonal antibodies</subject><subject>Physiological aspects</subject><subject>Sialic Acid Binding Ig-like Lectin 2 - metabolism</subject><subject>Systemic lupus erythematosus</subject><issn>1478-6354</issn><issn>1478-6362</issn><issn>1478-6354</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkl2L1TAQhoso7of6EyQguFdd8932RliP6wcseKPXYZpOz4m0TU3SxaN_3tSzHlwQTC4ymTzvG2aYonjG6CVjtX4FQbCqeVCcMlnVpRaaPzzGSp4UZzF-pZTzhsvHxQlnVFEp-Gnx83oOkJYfywgtSRC2mNy0Jb4nm7ecE-h7tCkS6HYYnZ_I6Ae0y4AEv88B4-8cTB0Z3Tb7rLcsfVNaHIZI3ETiPiYcnSXDMi-RYNinHY6QfFzik-JRD0PEp3fnefHl3fXnzYfy5tP7j5urm9IqQVNZNVQ1HZUKKkBJGQjaMGStVjVTbdcqzQG5ECCqptaV4sKyumk4WiloS2txXrw--M5LO2JncUoBBjMHN0LYGw_O3H-Z3M5s_a0RVGrFaDa4uDMI_tuCMZnRxbVEmNAv0TS0Yporrv5L1kpxqhnTmXxxILcwoHFT7_PXdqXNFZe8ykvITF3-g8q7W5vqJ-xdzt8TvDwIbPAxBuyPZTJq1kkxh0nJ4PO_m3LE_oyG-AU4xbh9</recordid><startdate>20100101</startdate><enddate>20100101</enddate><creator>Daridon, Capucine</creator><creator>Blassfeld, Daniela</creator><creator>Reiter, Karin</creator><creator>Mei, Henrik E</creator><creator>Giesecke, Claudia</creator><creator>Goldenberg, David M</creator><creator>Hansen, Arne</creator><creator>Hostmann, Arwed</creator><creator>Frölich, Daniela</creator><creator>Dörner, Thomas</creator><general>BioMed Central Ltd</general><general>BioMed Central</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7T5</scope><scope>H94</scope><scope>5PM</scope></search><sort><creationdate>20100101</creationdate><title>Epratuzumab targeting of CD22 affects adhesion molecule expression and migration of B-cells in systemic lupus erythematosus</title><author>Daridon, Capucine ; 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Treatment of SLE patients with epratuzumab leads to a reduction of circulating CD27(negative) B-cells, although epratuzumab is weakly cytotoxic to B-cells in vitro. Therefore, potential effects of epratuzumab on adhesion molecule expression and the migration of B-cells have been evaluated.
Epratuzumab binding specificity and the surface expression of adhesion molecules (CD62L, β7 integrin and β1 integrin) after culture with epratuzumab was studied on B-cell subsets of SLE patients by flow cytometry. In addition, in vitro transwell migration assays were performed to analyze the effects of epratuzumab on migration towards different chemokines such as CXCL12, CXCL13 or to CXCR3 ligands, and to assess the functional consequences of altered adhesion molecule expression.
Epratuzumab binding was considerably higher on B-cells relative to other cell types assessed. No binding of epratuzumab was observed on T-cells, while weak non-specific binding of epratuzumab on monocytes was noted. On B-cells, binding of epratuzumab was particularly enhanced on CD27(negative) B-cells compared to CD27(positive) B-cells, primarily related to a higher expression of CD22 on CD27(negative) B-cells. Moreover, epratuzumab binding led to a decrease in the cell surface expression of CD62L and β7 integrin, while the expression of β1 integrin was enhanced. The effects on the pattern of adhesion molecule expression observed with epratuzumab were principally confined to a fraction of the CD27(negative) B-cell subpopulation and were associated with enhanced spontaneous migration of B-cells. Furthermore, epratuzumab also enhanced the migration of CD27(negative) B-cells towards the chemokine CXCL12.
The current data suggest that epratuzumab has effects on the expression of the adhesion molecules CD62L, β7 integrin and β1 integrin as well as on migration towards CXCL12, primarily of CD27(negative) B-cells. Therefore, induced changes in migration appear to be part of the mechanism of action of epratuzumab and are consistent with the observation that CD27(negative) B-cells were found to be preferentially reduced in the peripheral blood under treatment.</abstract><cop>England</cop><pub>BioMed Central Ltd</pub><pmid>21050432</pmid><doi>10.1186/ar3179</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Adult Antibodies, Monoclonal - pharmacology Antibodies, Monoclonal, Humanized B cells B-Lymphocytes - cytology B-Lymphocytes - drug effects B-Lymphocytes - immunology B-Lymphocytes - metabolism Cell adhesion molecules Cell Adhesion Molecules - biosynthesis Cell Adhesion Molecules - drug effects Cell Adhesion Molecules - immunology Cell migration Cell Movement Cell Separation Chemotaxis, Leukocyte - drug effects Complications and side effects Dosage and administration Drug targeting Drug therapy Female Flow Cytometry Humans Integrin beta Chains - biosynthesis Integrin beta1 - biosynthesis L-Selectin - biosynthesis Lupus Erythematosus, Systemic - immunology Lupus Erythematosus, Systemic - metabolism Male Monoclonal antibodies Physiological aspects Sialic Acid Binding Ig-like Lectin 2 - metabolism Systemic lupus erythematosus |
| title | Epratuzumab targeting of CD22 affects adhesion molecule expression and migration of B-cells in systemic lupus erythematosus |
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