Monoclonal Antibodies in Immunodiagnosis and Immunotherapy最新文献

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A Comparison of Murine PD-1 and PD-L1 Monoclonal Antibodies. 小鼠PD-1和PD-L1单克隆抗体的比较。
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-08-01 DOI: 10.1089/mab.2021.0068
Melissa T Bu, Long Yuan, Alyssa N Klee, Gordon J Freeman
{"title":"A Comparison of Murine PD-1 and PD-L1 Monoclonal Antibodies.","authors":"Melissa T Bu,&nbsp;Long Yuan,&nbsp;Alyssa N Klee,&nbsp;Gordon J Freeman","doi":"10.1089/mab.2021.0068","DOIUrl":"https://doi.org/10.1089/mab.2021.0068","url":null,"abstract":"<p><p>Blockade of the PD-L1/PD-1 pathway has proven to be a broadly effective cancer immunotherapy. FDA-approved therapeutic monoclonal antibodies (mAbs) targeting the pathway have high affinity, blocking capacity, and low antibody effector activity. A number of rat antimouse mAbs have been used to model cancer immunotherapy in mouse models. We set forth the amino acid sequences of mAbs specific for mouse PD-1 (29F.1A12) and PD-L1 (10F.9G2) and compare their avidities, blocking capacities, biological activities, and epitope recognition with other commonly used mAbs. Further manipulation of these sequences should facilitate better modeling of immunotherapy in mouse models and the generation of novel agents.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":"41 4","pages":"202-209"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b4/6b/mab.2021.0068.PMC9451140.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9701065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Epitope Mapping of an Anti-elephant Podoplanin Monoclonal Antibody (PMab-295) Using Enzyme-Linked Immunosorbent Assay. 酶联免疫吸附法测定抗大象Podoplanin单克隆抗体(PMab-295)的表位
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-08-01 Epub Date: 2022-08-02 DOI: 10.1089/mab.2022.0017
Yuki Okada, Hiroyuki Suzuki, Mika K Kaneko, Yukinari Kato
{"title":"Epitope Mapping of an Anti-elephant Podoplanin Monoclonal Antibody (PMab-295) Using Enzyme-Linked Immunosorbent Assay.","authors":"Yuki Okada,&nbsp;Hiroyuki Suzuki,&nbsp;Mika K Kaneko,&nbsp;Yukinari Kato","doi":"10.1089/mab.2022.0017","DOIUrl":"https://doi.org/10.1089/mab.2022.0017","url":null,"abstract":"<p><p>Podoplanin (PDPN) is a marker of lung type I alveolar cells, kidney podocytes, and lymphatic endothelial cells. The overexpression of PDPN contributes to the malignant progression of tumors. Therefore, the development of anti-PDPN monoclonal antibodies (mAbs) to animals is essential to evaluate the pathogenesis and cellular functions. Using peptide immunization, we previously developed an anti-elephant PDPN (elePDPN) mAb, PMab-295, which is useful for flow cytometry, Western blotting, and immunohistochemistry. In this study, we determined the critical epitope of PMab-295 by enzyme-linked immunosorbent assay (ELISA). We performed ELISA with the alanine-substituted peptides of elePDPN extracellular domain (amino acids 38-51), and found that PMab-295 did not recognize the alanine-substituted peptides of M41A, P44A, and E47A. Furthermore, these peptides could not inhibit the recognition of PMab-295 to elePDPN-expressing cells by flow cytometry and immunohistochemistry. The results indicate that the binding epitope of PMab-295 includes Met41, Pro44, and Glu47 of elePDPN.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":"221-227"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40577486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Noninferiority of Subcutaneous Versus Intravenous Casirivimab/Imdevimab for Outpatient Treatment of SARS-CoV-2 in a Real-World Setting. 在现实世界中,门诊治疗SARS-CoV-2的非劣效性:皮下注射与静脉注射卡西瑞维单抗/伊姆德维单抗
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-08-01 Epub Date: 2022-08-03 DOI: 10.1089/mab.2022.0008
Alex Belote, Sharon Reece, Samantha Robinson, Hanna Jensen, Sheena CarlLee, Megan Clark, Spencer Parnell, Caroline Geels, James Newton
{"title":"Noninferiority of Subcutaneous Versus Intravenous Casirivimab/Imdevimab for Outpatient Treatment of SARS-CoV-2 in a Real-World Setting.","authors":"Alex Belote,&nbsp;Sharon Reece,&nbsp;Samantha Robinson,&nbsp;Hanna Jensen,&nbsp;Sheena CarlLee,&nbsp;Megan Clark,&nbsp;Spencer Parnell,&nbsp;Caroline Geels,&nbsp;James Newton","doi":"10.1089/mab.2022.0008","DOIUrl":"https://doi.org/10.1089/mab.2022.0008","url":null,"abstract":"<p><p>Monoclonal antibody (mAb) therapy has emerged as one of the mainstay treatment options for SARS-CoV-2. To improve speed of delivery and decrease bedside nursing needs, subcutaneous (SC) delivery of mAbs has been explored as an alternative to standard intravenous (IV) administration. To date, data regarding the effectiveness of SC compared with IV mAb are lacking. This retrospective cohort analysis conducted between April 2021 and August 2021 compared hospitalization rates among patients receiving IV versus SC administration of casirivimab/imdevimab (Regen-COV) at a single institution in Arkansas. Casirivimab/imdevimab was a promising mAb therapy utilized during the height of the Delta variant surge of the SARS-CoV-2 pandemic. Before resistance developed by the Omicron variant, casirivimab/imdevimab was utilized for outpatient treatment of SARS-CoV-2 patients at risk of deterioration. Primary outcomes of this investigation were the 30-day post-treatment rate of hospitalization and intensive care unit (ICU) care during hospitalization. There was no increased risk of hospitalization or ICU care with SC administration compared with IV administration. As SARS-CoV-2 continues to mutate into variants such as Omicron and develop resistance to existing mAbs, these preliminary findings of noninferiority of SC versus IV warrant ongoing investigation into SC administration of other mAbs.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":"210-213"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40580530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a Monoclonal Antibody PMab-295 Against Elephant Podoplanin. 抗大象足素单克隆抗体PMab-295的研制
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-08-01 Epub Date: 2022-08-02 DOI: 10.1089/mab.2022.0007
Yuma Kudo, Hiroyuki Suzuki, Mika K Kaneko, Yukinari Kato
{"title":"Development of a Monoclonal Antibody PMab-295 Against Elephant Podoplanin.","authors":"Yuma Kudo,&nbsp;Hiroyuki Suzuki,&nbsp;Mika K Kaneko,&nbsp;Yukinari Kato","doi":"10.1089/mab.2022.0007","DOIUrl":"https://doi.org/10.1089/mab.2022.0007","url":null,"abstract":"<p><p>Podoplanin (PDPN) is an essential marker of lung type I alveolar cells, kidney podocytes, and lymphatic endothelial cells. Monoclonal antibodies (mAbs) that can specifically recognize PDPN in immunohistochemistry are important to analyze the development of tissues and the pathogenesis of diseases, including cancers. We have developed anti-PDPN mAbs against many animal species; however, mAbs that can recognize elephant-derived membrane proteins and distinguish the specific cell types in immunohistochemistry are limited. In this study, a novel anti-elephant PDPN (elePDPN) mAb, PMab-295 (IgG<sub>1</sub>, kappa), was established using the peptide immunization method. PMab-295 recognized both elePDPN-overexpressed Chinese hamster ovary (CHO)-K1 cells and endogenous elePDPN-expressed LACF-NaNaI cells by flow cytometry and western blotting. Kinetic analyses using flow cytometry showed that the <i>K</i><sub>D</sub> of PMab-295 for CHO/elePDPN was 1.5 × 10<sup>-8</sup> M. Furthermore, PMab-295 detected elePDPN-expressing cells using immunohistochemistry. These results showed the usefulness of PMab-295 to investigate the molecular function of elePDPN and the pathogenesis of diseases.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":"194-201"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40594568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Identification of the Binding Epitope of an Anti-mouse CCR4 Monoclonal Antibody, C4Mab-1. 抗小鼠CCR4单克隆抗体C4Mab-1结合表位的鉴定
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-08-01 Epub Date: 2022-08-02 DOI: 10.1089/mab.2022.0015
Teizo Asano, Hiroyuki Suzuki, Tomohiro Tanaka, Mika K Kaneko, Yukinari Kato
{"title":"Identification of the Binding Epitope of an Anti-mouse CCR4 Monoclonal Antibody, C<sub>4</sub>Mab-1.","authors":"Teizo Asano,&nbsp;Hiroyuki Suzuki,&nbsp;Tomohiro Tanaka,&nbsp;Mika K Kaneko,&nbsp;Yukinari Kato","doi":"10.1089/mab.2022.0015","DOIUrl":"https://doi.org/10.1089/mab.2022.0015","url":null,"abstract":"<p><p>C-C chemokine receptor 4 (CCR4) is one of G protein-coupled receptors, and interacts with chemokines, CCL17 and CCL22. CCR4 is expressed on T cells such as helper T type 2 cells, regulatory T cells, and interleukin 17-producing T helper cells. CCR4 is associated with T cells trafficking into the tumor microenvironment, and is associated with tumor progression or metastasis. Therefore, CCR4 may be a potential therapeutic option for T cell malignancies. C<sub>4</sub>Mab-1 is a novel anti-mouse CCR4 (mCCR4) monoclonal antibody produced by mCCR4 N-terminal peptide immunization. C<sub>4</sub>Mab-1 is useful for flow cytometric analysis. In this study, we conducted the epitope mapping of C<sub>4</sub>Mab-1 using enzyme-linked immunosorbent assay (ELISA) and peptide blocking assay. The result of ELISA indicated that Thr7, Asp8, and Gln11 of mCCR4 are the critical amino acids for the C<sub>4</sub>Mab-1 binding. Furthermore, peptide blocking assay by flow cytometry showed that Thr7, Asp8, and Gln11 of mCCR4 are essential for C<sub>4</sub>Mab-1 binding to mCCR4-overexpressed Chinese hamster ovary-K1 (CHO/mCCR4) cells, and Val6, Thr9, and Thr10 are involved in the C<sub>4</sub>Mab-1 binding to CHO/mCCR4 cells. These results indicate that the critical binding epitope of C<sub>4</sub>Mab-1 includes Thr7, Asp8, and Gln11 of mCCR4.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":"214-220"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40594570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of an Anti-human CCR2 Monoclonal Antibody (C2Mab-9) by N-Terminal Peptide Immunization. n端肽免疫制备抗人CCR2单克隆抗体(C2Mab-9)
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-08-01 Epub Date: 2022-08-02 DOI: 10.1089/mab.2022.0001
Tomohiro Tanaka, Guanjie Li, Masaki Saito, Hiroyuki Suzuki, Teizo Asano, Mika K Kaneko, Yukinari Kato
{"title":"Development of an Anti-human CCR2 Monoclonal Antibody (C<sub>2</sub>Mab-9) by N-Terminal Peptide Immunization.","authors":"Tomohiro Tanaka,&nbsp;Guanjie Li,&nbsp;Masaki Saito,&nbsp;Hiroyuki Suzuki,&nbsp;Teizo Asano,&nbsp;Mika K Kaneko,&nbsp;Yukinari Kato","doi":"10.1089/mab.2022.0001","DOIUrl":"https://doi.org/10.1089/mab.2022.0001","url":null,"abstract":"<p><p>The CC chemokine receptor type-2 (CCR2) is one of the members of the G protein-coupled receptor superfamily, which are expressed on the cell surface of immune and tumor cells. CCR2 binds to the C-C motif chemokine ligand 2 (CCL2)/monocyte chemoattractant protein-1 (MCP-1), which is produced by various cells, including tumor and immune-related cells. Therefore, the development of sensitive monoclonal antibodies (mAbs) for CCR2 has been desired for treatment and diagnosis. In this study, we established a specific antihuman CCR2 (hCCR2) mAb, C<sub>2</sub>Mab-9 (mouse IgG<sub>1</sub>, kappa), using the synthetic peptide immunization method. Flow cytometric and immunocytochemical results showed that C<sub>2</sub>Mab-9 reacted with hCCR2-expressing U937 (human histiocytic lymphoma) and natural killer cells. Furthermore, C<sub>2</sub>Mab-9 showed the moderate binding affinity for both cells. Conclusively, C<sub>2</sub>Mab-9 can be a useful tool for analyzing hCCR2-related biological responses.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":"188-193"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40594569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Epitope Mapping of the Anti-Human CCR2 Monoclonal Antibody C2Mab-9. 抗人CCR2单克隆抗体C2Mab-9的表位定位
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-06-06 DOI: 10.1089/mab.2022.0012
Tomohiro Tanaka, Guanjie Li, Teizo Asano, M. Kaneko, Hiroyuki Suzuki, Y. Kato
{"title":"Epitope Mapping of the Anti-Human CCR2 Monoclonal Antibody C2Mab-9.","authors":"Tomohiro Tanaka, Guanjie Li, Teizo Asano, M. Kaneko, Hiroyuki Suzuki, Y. Kato","doi":"10.1089/mab.2022.0012","DOIUrl":"https://doi.org/10.1089/mab.2022.0012","url":null,"abstract":"CC chemokine receptor type-2 (CCR2) belongs to the G protein-coupled receptors superfamily, localized on cell surface of some immune-related cells, including monocytes and macrophages. CCR2 and its ligand CCL2 are involved in the progression of various diseases such as cancers. Therefore, CCR2-targeted monoclonal antibodies (mAbs) are needed for treatment and diagnosis. Previously, we successfully developed an anti-human CCR2 (hCCR2) mAb, C2Mab-9 (mouse IgG1, kappa), which is applicable for flow cytometry and immunocytochemistry. In this study, we investigated the critical epitope of C2Mab-9. We conducted enzyme-linked immunosorbent assay (ELISA) using several N-terminal peptides of hCCR2, and demonstrated that C2Mab-9 recognizes 11-29 and 21-39 amino acids of hCCR2. We further performed ELISA using 20 peptides, which include alanine substitution of hCCR2. C2Mab-9 lost the reaction to the alanine-substituted peptides of F23A, F24A, D25A, Y26A, and D27A. Among them, F23A, F24A, D25A, and Y26A did not block the C2Mab-9 reaction with U937 cells in flow cytometry. These results indicate that the critical binding epitope of C2Mab-9 includes Phe23, Phe24, Asp25, and Tyr26.","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45756339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Epitope Mapping of an Anti-Chinese/Golden Hamster Podoplanin Monoclonal Antibody. 抗中国/金仓鼠Podoplanin单克隆抗体的表位定位。
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-06-06 DOI: 10.1089/mab.2022.0014
Nohara Goto, Hiroyuki Suzuki, Tomohiro Tanaka, Teizo Asano, M. Kaneko, Y. Kato
{"title":"Epitope Mapping of an Anti-Chinese/Golden Hamster Podoplanin Monoclonal Antibody.","authors":"Nohara Goto, Hiroyuki Suzuki, Tomohiro Tanaka, Teizo Asano, M. Kaneko, Y. Kato","doi":"10.1089/mab.2022.0014","DOIUrl":"https://doi.org/10.1089/mab.2022.0014","url":null,"abstract":"Chinese hamster (Cricetulus griseus) and golden hamster (Mesocricetus auratus) are important animal models of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections, which affect several organs, including respiratory tract, lung, and kidney. Podoplanin (PDPN) is a marker of lung type I alveolar cells, kidney podocytes, and lymphatic endothelial cells. The development of anti-PDPN monoclonal antibodies (mAbs) for these animals is essential to evaluate the pathogenesis by SARS-CoV-2 infections. Using the Cell-Based Immunization and Screening method, we previously developed an anti-Chinese hamster PDPN (ChamPDPN) mAb, PMab-281 (mouse IgG3, kappa), and further changed its subclass into IgG2a (281-mG2a-f), both of which can recognize not only ChamPDPN but also golden hamster PDPN (GhamPDPN) by flow cytometry and immunohistochemistry. In this study, we examined the critical epitope of 281-mG2a-f, using enzyme-linked immunosorbent assay (ELISA) with synthesized peptides. First, we performed ELISA with peptides derived from ChamPDPN and GhamPDPN extracellular domain, and found that 281-mG2a-f reacted with the peptides, which commonly possess the KIPFEELxT sequence. Next, we analyzed the reaction with the alanine-substituted mutants, and revealed that 281-mG2a-f did not recognize the alanine-substituted peptides of I75A, F77A, and E79A of ChamPDPN. Furthermore, these peptides could not inhibit the recognition of 281-mG2a-f to ChamPDPN-expressing cells by flow cytometry. The results indicate that the binding epitope of 281-mG2a-f includes Ile75, Phe77, and Glu79 of ChamPDPN, which are shared with GhamPDPN.","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45968776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Defucosylated Anti-Epidermal Growth Factor Receptor Monoclonal Antibody Exerted Antitumor Activities in Mouse Xenograft Models of Canine Mammary Gland Tumor. 去聚焦抗表皮生长因子受体单克隆抗体在犬乳腺肿瘤小鼠异种移植瘤模型中显示抗肿瘤活性。
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-06-06 DOI: 10.1089/mab.2022.0009
Tomohiro Tanaka, T. Ohishi, Masaki Saito, Hiroyuki Suzuki, M. Kaneko, M. Kawada, Y. Kato
{"title":"Defucosylated Anti-Epidermal Growth Factor Receptor Monoclonal Antibody Exerted Antitumor Activities in Mouse Xenograft Models of Canine Mammary Gland Tumor.","authors":"Tomohiro Tanaka, T. Ohishi, Masaki Saito, Hiroyuki Suzuki, M. Kaneko, M. Kawada, Y. Kato","doi":"10.1089/mab.2022.0009","DOIUrl":"https://doi.org/10.1089/mab.2022.0009","url":null,"abstract":"The epidermal growth factor receptor (EGFR) contributes to tumor malignancy through gene amplification and/or protein overexpression. In our previous study, we developed an anti-human EGFR (hEGFR) monoclonal antibody, clone EMab-134 (mouse IgG1, kappa), which specifically detects both hEGFR and dog EGFR (dEGFR). The defucosylated mouse IgG2a version of EMab-134 (134-mG2a-f) exhibits antibody-dependent cellular cytotoxicity (ADCC) and complement-dependent cytotoxicity (CDC) in dEGFR-overexpressed Chinese hamster ovary-K1 (CHO/dEGFR) cells and antitumor activities in mouse xenografts of CHO/dEGFR cells. In this study, the reactivity of 134-mG2a-f against a canine mammary gland tumor cell line (SNP) was examined by flow cytometry and immunocytochemistry. Furthermore, 134-mG2a-f highly exerted ADCC and CDC for SNP. The administration of 134-mG2a-f significantly suppressed the SNP xenograft growth. These results suggest that 134-mG2a-f exerts antitumor effects against dEGFR-expressing canine mammary gland tumors, and could be valuable as part of an antibody treatment regimen for them.","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43672038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Cx6Mab-1: A Novel Anti-Mouse CXCR6 Monoclonal Antibody Established by N-Terminal Peptide Immunization. n端肽免疫构建抗小鼠CXCR6单克隆抗体Cx6Mab-1
Monoclonal Antibodies in Immunodiagnosis and Immunotherapy Pub Date : 2022-06-01 DOI: 10.1089/mab.2022.0010
Kaishi Kitamura, Hiroyuki Suzuki, Mika K Kaneko, Yukinari Kato
{"title":"Cx<sub>6</sub>Mab-1: A Novel Anti-Mouse CXCR6 Monoclonal Antibody Established by N-Terminal Peptide Immunization.","authors":"Kaishi Kitamura,&nbsp;Hiroyuki Suzuki,&nbsp;Mika K Kaneko,&nbsp;Yukinari Kato","doi":"10.1089/mab.2022.0010","DOIUrl":"https://doi.org/10.1089/mab.2022.0010","url":null,"abstract":"<p><p>The CXC chemokine receptor 6 (CXCR6) is a member of the G protein-coupled receptor family that is highly expressed in helper T type 1 cells, natural killer cells, cytotoxic T lymphocytes, and various type of cells in tumor microenvironment (TME). CXCR6 has been proposed as a therapeutic target against tumors through regulation of the tumor TME. In this study, we developed specific and sensitive monoclonal antibodies (mAbs) for mouse CXCR6 (mCXCR6), which are useful for flow cytometry and Western blotting by N-terminal peptide immunization into rat. The established anti-mCXCR6 mAb, Cx<sub>6</sub>Mab-1 (rat IgG<sub>1</sub>, kappa), reacted with not only mCXCR6-overexpressed Chinese hamster ovary-K1 (CHO/mCXCR6) but also mCXCR6-endogenously expressed cell lines, such as P388 (mouse lymphoid neoplasm) and J774-1 (mouse macrophage-like) through flow cytometry. Kinetic analyses using flow cytometry indicated that the dissociation constants (<i>K</i><sub>D</sub>) of Cx<sub>6</sub>Mab-1 for CHO/mCXCR6, P388, and J774-1 cells were 1.7 × 10<sup>-9</sup> M, 3.4 × 10<sup>-7</sup> M, and 3.8 × 10<sup>-7</sup> M, respectively. Furthermore, Cx<sub>6</sub>Mab-1 could detect endogenous mCXCR6 in P388 and J774-1 cells by Western blotting. These results indicated that Cx<sub>6</sub>Mab-1 is useful for detecting mCXCR6 by flow cytometry and Western blotting, and provides a possibility for targeting CXCR6-expressing cells <i>in vivo</i> experiments.</p>","PeriodicalId":53514,"journal":{"name":"Monoclonal Antibodies in Immunodiagnosis and Immunotherapy","volume":" ","pages":"133-141"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40268727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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