1339 The characteristic of memory B-cell subsets in patients with IgA-nephropathy

1339 The characteristic of memory B-cell subsets in patients with IgA-nephropathy

Abstract Background and Aims Impaired B-cell development has been postulated to play an important role in the maintaining of autoimmune inflammation what makes memory B-cells a perspective target for a new therapeutic strategy in IgA-nephropathy (IgAN). However, to date there are few and controversi...

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Veröffentlicht in:Nephrology, dialysis, transplantation dialysis, transplantation, 2024-05, Vol.39 (Supplement_1)
Hauptverfasser: Komissarov, Kirill, Nizheharodava, Darya, Minchenko, Alena, Dmitrieva, Margarita, Pilotovich, Valery, Zafranskaya, Maryna
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container_title Nephrology, dialysis, transplantation
container_volume 39
creator Komissarov, Kirill
Nizheharodava, Darya
Minchenko, Alena
Dmitrieva, Margarita
Pilotovich, Valery
Zafranskaya, Maryna
description Abstract Background and Aims Impaired B-cell development has been postulated to play an important role in the maintaining of autoimmune inflammation what makes memory B-cells a perspective target for a new therapeutic strategy in IgA-nephropathy (IgAN). However, to date there are few and controversial data about the precise role of circulating memory B-cell subsets in clinical progression of IgAN. The aim was to estimate the immunological profile of memory B-cell subpopulations in the peripheral blood of IgAN patients. Method The peripheral blood was obtained from 20 IgAN patients (aged of 32.0 (27.0-36.0) y.o., male/female ratio as 13/7) and 15 donors (aged of 38.0 (30.0-46.0) y.o., male/female ratio as 10/5). The diagnosis was confirmed by morphological examination of the biopsy material. The phenotype of B-cells subsets was determined by a panel of CD38-PE/CD19-ECD/CD27-PC5/IgD-APC antibodies; γδT-lymphocytes—by a panel of TCRγδ-FITC/TCRαβ-PE/HLA-DR-ECD/TCRVδ1-PC7/CD3-APC-A750/TCRVδ2-PB/ CD45-KRO antibodies using flow cytometry method (Cytoflex, Beckman Coulter, USA). The concentration of B-cell activating factor (BAFF) was measured using enzyme-linked immunosorbent assay. Statistical data processing was done in Statistica 10.0 program. Results Based on cell surface markers expression the following B-cells subsets were identified in the peripheral blood: naïve B-cells (CD19+CD27−IgD+), pre-switched B-cells (CD19+CD27+IgD+), switched B-cells (CD19+CD27+IgD−), plasmablasts (CD19+CD27+CD38+) and long-lived plasma cells (CD27hiCD38hi) (Fig. 1). The altered balance in B-cells maturation characterizing by a significant lower percent of pre-switched B-cells and plasmablasts (p 55%) in the naive B-cells (p 
doi_str_mv 10.1093/ndt/gfae069.209
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However, to date there are few and controversial data about the precise role of circulating memory B-cell subsets in clinical progression of IgAN. The aim was to estimate the immunological profile of memory B-cell subpopulations in the peripheral blood of IgAN patients. Method The peripheral blood was obtained from 20 IgAN patients (aged of 32.0 (27.0-36.0) y.o., male/female ratio as 13/7) and 15 donors (aged of 38.0 (30.0-46.0) y.o., male/female ratio as 10/5). The diagnosis was confirmed by morphological examination of the biopsy material. The phenotype of B-cells subsets was determined by a panel of CD38-PE/CD19-ECD/CD27-PC5/IgD-APC antibodies; γδT-lymphocytes—by a panel of TCRγδ-FITC/TCRαβ-PE/HLA-DR-ECD/TCRVδ1-PC7/CD3-APC-A750/TCRVδ2-PB/ CD45-KRO antibodies using flow cytometry method (Cytoflex, Beckman Coulter, USA). The concentration of B-cell activating factor (BAFF) was measured using enzyme-linked immunosorbent assay. Statistical data processing was done in Statistica 10.0 program. Results Based on cell surface markers expression the following B-cells subsets were identified in the peripheral blood: naïve B-cells (CD19+CD27−IgD+), pre-switched B-cells (CD19+CD27+IgD+), switched B-cells (CD19+CD27+IgD−), plasmablasts (CD19+CD27+CD38+) and long-lived plasma cells (CD27hiCD38hi) (Fig. 1). The altered balance in B-cells maturation characterizing by a significant lower percent of pre-switched B-cells and plasmablasts (p < 0.05) as well as a higher trend (>55%) in the naive B-cells (p < 0.01) was established in IgAN patients as compared to healthy donors reflecting the exhaustion of peripheral blood plasmablasts due to constant generation of antibody-producing plasma cells. Moreover, the lower pre-switched B-cells percentage was detected in the blood, the more BAFF production was observed in serum of IgAN patients (R = 0.50; p < 0.05) and the higher proteinuria level was detected (R = 0.47; p < 0.05). The increased total number of γδТ-cells up to 9.42 (6.25-12.44)% in IgAN patients as compared to donors (p = 0.03) was correlated with total memory CD19+CD27+B-cells numbers (R = 0.54; p < 0.05) as well as pre-switched B-cells (R = 0.45; p < 0.05), plasmablasts (R = 0.57; p < 0.01) and long-lived plasma cells (R = 0.51; p < 0.05). A detailed subsets analysis revealed an elevated level of tissue-resident mucosa-associated cells (Vδ1+ and Vδ3+T-lymphocytes) as well as enhanced HLA-DR expression on them (p < 0.05) in combination with decreased normally circulating Vδ2+T-cells numbers (p < 0.01) as compared to healthy donors what characterized Vδ1+ and Vδ3+T-cells subsets as professional antigen presenting cells and indicated their possible role in the priming of antigen specific B-cells. Conclusion Suggesting that most peripheral B-lymphocytes are naïve, the obtained data may reflect a γδT-cells role in migration of pre-switched B-cells from the circulation to mucosa sites for possible further maturation and class-switching what allows us to consider these two parameters as potential useful biomarkers of IgAN disease prognosis in clinical practice. Figure 1: Memory B-cells subsets in IgAN patients and healthy donors.]]></description><identifier>ISSN: 0931-0509</identifier><identifier>EISSN: 1460-2385</identifier><identifier>DOI: 10.1093/ndt/gfae069.209</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Nephrology, dialysis, transplantation, 2024-05, Vol.39 (Supplement_1)</ispartof><rights>The Author(s) 2024. Published by Oxford University Press on behalf of the ERA. 2024</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Komissarov, Kirill</creatorcontrib><creatorcontrib>Nizheharodava, Darya</creatorcontrib><creatorcontrib>Minchenko, Alena</creatorcontrib><creatorcontrib>Dmitrieva, Margarita</creatorcontrib><creatorcontrib>Pilotovich, Valery</creatorcontrib><creatorcontrib>Zafranskaya, Maryna</creatorcontrib><title>1339 The characteristic of memory B-cell subsets in patients with IgA-nephropathy</title><title>Nephrology, dialysis, transplantation</title><description><![CDATA[Abstract Background and Aims Impaired B-cell development has been postulated to play an important role in the maintaining of autoimmune inflammation what makes memory B-cells a perspective target for a new therapeutic strategy in IgA-nephropathy (IgAN). However, to date there are few and controversial data about the precise role of circulating memory B-cell subsets in clinical progression of IgAN. The aim was to estimate the immunological profile of memory B-cell subpopulations in the peripheral blood of IgAN patients. Method The peripheral blood was obtained from 20 IgAN patients (aged of 32.0 (27.0-36.0) y.o., male/female ratio as 13/7) and 15 donors (aged of 38.0 (30.0-46.0) y.o., male/female ratio as 10/5). The diagnosis was confirmed by morphological examination of the biopsy material. The phenotype of B-cells subsets was determined by a panel of CD38-PE/CD19-ECD/CD27-PC5/IgD-APC antibodies; γδT-lymphocytes—by a panel of TCRγδ-FITC/TCRαβ-PE/HLA-DR-ECD/TCRVδ1-PC7/CD3-APC-A750/TCRVδ2-PB/ CD45-KRO antibodies using flow cytometry method (Cytoflex, Beckman Coulter, USA). The concentration of B-cell activating factor (BAFF) was measured using enzyme-linked immunosorbent assay. Statistical data processing was done in Statistica 10.0 program. Results Based on cell surface markers expression the following B-cells subsets were identified in the peripheral blood: naïve B-cells (CD19+CD27−IgD+), pre-switched B-cells (CD19+CD27+IgD+), switched B-cells (CD19+CD27+IgD−), plasmablasts (CD19+CD27+CD38+) and long-lived plasma cells (CD27hiCD38hi) (Fig. 1). The altered balance in B-cells maturation characterizing by a significant lower percent of pre-switched B-cells and plasmablasts (p < 0.05) as well as a higher trend (>55%) in the naive B-cells (p < 0.01) was established in IgAN patients as compared to healthy donors reflecting the exhaustion of peripheral blood plasmablasts due to constant generation of antibody-producing plasma cells. Moreover, the lower pre-switched B-cells percentage was detected in the blood, the more BAFF production was observed in serum of IgAN patients (R = 0.50; p < 0.05) and the higher proteinuria level was detected (R = 0.47; p < 0.05). The increased total number of γδТ-cells up to 9.42 (6.25-12.44)% in IgAN patients as compared to donors (p = 0.03) was correlated with total memory CD19+CD27+B-cells numbers (R = 0.54; p < 0.05) as well as pre-switched B-cells (R = 0.45; p < 0.05), plasmablasts (R = 0.57; p < 0.01) and long-lived plasma cells (R = 0.51; p < 0.05). A detailed subsets analysis revealed an elevated level of tissue-resident mucosa-associated cells (Vδ1+ and Vδ3+T-lymphocytes) as well as enhanced HLA-DR expression on them (p < 0.05) in combination with decreased normally circulating Vδ2+T-cells numbers (p < 0.01) as compared to healthy donors what characterized Vδ1+ and Vδ3+T-cells subsets as professional antigen presenting cells and indicated their possible role in the priming of antigen specific B-cells. Conclusion Suggesting that most peripheral B-lymphocytes are naïve, the obtained data may reflect a γδT-cells role in migration of pre-switched B-cells from the circulation to mucosa sites for possible further maturation and class-switching what allows us to consider these two parameters as potential useful biomarkers of IgAN disease prognosis in clinical practice. Figure 1: Memory B-cells subsets in IgAN patients and healthy donors.]]></description><issn>0931-0509</issn><issn>1460-2385</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNqFkEFLAzEUhIMoWKtnrzkL6eYl2aw51qK1UBChnpds-tJdaXeXJEX67420d09vGGaGx0fII_AZcCOLfpuKnbfItZkJbq7IBJTmTMjn8ppMcgIYL7m5JXcxfnPOjaiqCfkEKQ3dtEhda4N1CUMXU-fo4OkBD0M40RfmcL-n8dhETJF2PR1t6rDP-qdLLV3t5qzHsQ1D9tvTPbnxdh_x4XKn5OvtdbN4Z-uP5WoxXzMHoA0DkZ8UXHitEb0CgLKSiMLp7CsPTlXolKtU43WjJCplS6wUbrdGGKW8nJLivOvCEGNAX4-hO9hwqoHXf0TqTKS-EKnzaG48nRvDcfw3_AspRWL7</recordid><startdate>20240523</startdate><enddate>20240523</enddate><creator>Komissarov, Kirill</creator><creator>Nizheharodava, Darya</creator><creator>Minchenko, Alena</creator><creator>Dmitrieva, Margarita</creator><creator>Pilotovich, Valery</creator><creator>Zafranskaya, Maryna</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20240523</creationdate><title>1339 The characteristic of memory B-cell subsets in patients with IgA-nephropathy</title><author>Komissarov, Kirill ; Nizheharodava, Darya ; Minchenko, Alena ; Dmitrieva, Margarita ; Pilotovich, Valery ; Zafranskaya, Maryna</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1169-12209202f66eef4111573ee2c62094f1c47ec4c74bf6b43e44a5e74edd92944f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Komissarov, Kirill</creatorcontrib><creatorcontrib>Nizheharodava, Darya</creatorcontrib><creatorcontrib>Minchenko, Alena</creatorcontrib><creatorcontrib>Dmitrieva, Margarita</creatorcontrib><creatorcontrib>Pilotovich, Valery</creatorcontrib><creatorcontrib>Zafranskaya, Maryna</creatorcontrib><collection>CrossRef</collection><jtitle>Nephrology, dialysis, transplantation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Komissarov, Kirill</au><au>Nizheharodava, Darya</au><au>Minchenko, Alena</au><au>Dmitrieva, Margarita</au><au>Pilotovich, Valery</au><au>Zafranskaya, Maryna</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>1339 The characteristic of memory B-cell subsets in patients with IgA-nephropathy</atitle><jtitle>Nephrology, dialysis, transplantation</jtitle><date>2024-05-23</date><risdate>2024</risdate><volume>39</volume><issue>Supplement_1</issue><issn>0931-0509</issn><eissn>1460-2385</eissn><abstract><![CDATA[Abstract Background and Aims Impaired B-cell development has been postulated to play an important role in the maintaining of autoimmune inflammation what makes memory B-cells a perspective target for a new therapeutic strategy in IgA-nephropathy (IgAN). However, to date there are few and controversial data about the precise role of circulating memory B-cell subsets in clinical progression of IgAN. The aim was to estimate the immunological profile of memory B-cell subpopulations in the peripheral blood of IgAN patients. Method The peripheral blood was obtained from 20 IgAN patients (aged of 32.0 (27.0-36.0) y.o., male/female ratio as 13/7) and 15 donors (aged of 38.0 (30.0-46.0) y.o., male/female ratio as 10/5). The diagnosis was confirmed by morphological examination of the biopsy material. The phenotype of B-cells subsets was determined by a panel of CD38-PE/CD19-ECD/CD27-PC5/IgD-APC antibodies; γδT-lymphocytes—by a panel of TCRγδ-FITC/TCRαβ-PE/HLA-DR-ECD/TCRVδ1-PC7/CD3-APC-A750/TCRVδ2-PB/ CD45-KRO antibodies using flow cytometry method (Cytoflex, Beckman Coulter, USA). The concentration of B-cell activating factor (BAFF) was measured using enzyme-linked immunosorbent assay. Statistical data processing was done in Statistica 10.0 program. Results Based on cell surface markers expression the following B-cells subsets were identified in the peripheral blood: naïve B-cells (CD19+CD27−IgD+), pre-switched B-cells (CD19+CD27+IgD+), switched B-cells (CD19+CD27+IgD−), plasmablasts (CD19+CD27+CD38+) and long-lived plasma cells (CD27hiCD38hi) (Fig. 1). The altered balance in B-cells maturation characterizing by a significant lower percent of pre-switched B-cells and plasmablasts (p < 0.05) as well as a higher trend (>55%) in the naive B-cells (p < 0.01) was established in IgAN patients as compared to healthy donors reflecting the exhaustion of peripheral blood plasmablasts due to constant generation of antibody-producing plasma cells. Moreover, the lower pre-switched B-cells percentage was detected in the blood, the more BAFF production was observed in serum of IgAN patients (R = 0.50; p < 0.05) and the higher proteinuria level was detected (R = 0.47; p < 0.05). The increased total number of γδТ-cells up to 9.42 (6.25-12.44)% in IgAN patients as compared to donors (p = 0.03) was correlated with total memory CD19+CD27+B-cells numbers (R = 0.54; p < 0.05) as well as pre-switched B-cells (R = 0.45; p < 0.05), plasmablasts (R = 0.57; p < 0.01) and long-lived plasma cells (R = 0.51; p < 0.05). A detailed subsets analysis revealed an elevated level of tissue-resident mucosa-associated cells (Vδ1+ and Vδ3+T-lymphocytes) as well as enhanced HLA-DR expression on them (p < 0.05) in combination with decreased normally circulating Vδ2+T-cells numbers (p < 0.01) as compared to healthy donors what characterized Vδ1+ and Vδ3+T-cells subsets as professional antigen presenting cells and indicated their possible role in the priming of antigen specific B-cells. Conclusion Suggesting that most peripheral B-lymphocytes are naïve, the obtained data may reflect a γδT-cells role in migration of pre-switched B-cells from the circulation to mucosa sites for possible further maturation and class-switching what allows us to consider these two parameters as potential useful biomarkers of IgAN disease prognosis in clinical practice. Figure 1: Memory B-cells subsets in IgAN patients and healthy donors.]]></abstract><pub>Oxford University Press</pub><doi>10.1093/ndt/gfae069.209</doi><oa>free_for_read</oa></addata></record>
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title 1339 The characteristic of memory B-cell subsets in patients with IgA-nephropathy
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