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El-Shershaby HM, Farrag NS, Ebeid NH, Moustafa KA. Radiolabeling and cytotoxicity of monoclonal antibody Isatuximab functionalized silver nanoparticles on the growth of multiple myeloma. Int J Pharm 2022; 624:122019. [PMID: 35842081 DOI: 10.1016/j.ijpharm.2022.122019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/08/2022] [Accepted: 07/10/2022] [Indexed: 11/18/2022]
Abstract
The goal of this article was to develop a new therapeutic strategy based on nanotechnology for multiple myeloma (MM) treatment which shows a synergism of different mechanisms. In this concern, 12.9 nm-sized silver nanoparticles (AgNPs) were prepared and functionalized with Isatuximab, anti-MM monoclonal antibody (mAb). Furthermore, the synthesized nanocomposite was radiolabelled with iodine-131 radionuclide and yielded 95.5 ± 1.5%. Then, the synergistic MM-proliferation inhibition efficacy of the radionanocomposite (131I-Isatuximab/AgNPs) was explored in-vitro in comparison to each single agent. The MTT investigation showed that the antiproliferation effect of 131I-Isatuximab/AgNPs increased by more than 1.5 fold if compared with Isatuximab, AgNPs, Isatuximab/AgNPs or 131I-Isatuximab. Additionally, 131I-Isatuximab/AgNPs exhibited an apoptotic effect on MM cells which was more than that of Isatuximab, AgNPs, Isatuximab/AgNPs or 131I-Isatuximab by 2, 1.8, 1.7 and 1.5 folds, respectively. In conclusion, the results expressed 131I-Isatuximab/AgNPs as a potential new anti-MM agent.
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Affiliation(s)
- Hanan M El-Shershaby
- Labeled Compounds Department, Hot Labs. Center, Egyptian Atomic Energy Authority (EAEA), P.O. Box 13759, Cairo, Egypt
| | - Nourihan S Farrag
- Labeled Compounds Department, Hot Labs. Center, Egyptian Atomic Energy Authority (EAEA), P.O. Box 13759, Cairo, Egypt.
| | - Nahed H Ebeid
- Labeled Compounds Department, Hot Labs. Center, Egyptian Atomic Energy Authority (EAEA), P.O. Box 13759, Cairo, Egypt
| | - Kamel A Moustafa
- Labeled Compounds Department, Hot Labs. Center, Egyptian Atomic Energy Authority (EAEA), P.O. Box 13759, Cairo, Egypt
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2
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Bethke M, Varga G, Weinhage T, Sabharwal H, Mellgren K, Randau G, Rolfing M, Wittkowski H, Foell D, Michgehl U, Burkhardt B. Patient parameters and response after administration of rituximab in pediatric mature B-cell non-Hodgkin lymphoma. Pediatr Blood Cancer 2022; 69:e29514. [PMID: 34939314 DOI: 10.1002/pbc.29514] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/25/2021] [Accepted: 11/20/2021] [Indexed: 11/12/2022]
Abstract
BACKGROUND Mature aggressive B-cell lymphomas are heterogenous malignancies that make up more than half of all diagnosed non-Hodgkin lymphoma in children and adolescents. The overall survival rate increased over the last decades to 80%-90% due to fine tuning of polychemotherapy. However, new therapeutic implications are needed to further increase the overall survival. Current clinical trials analyze the therapeutic effect of rituximab in pediatric patients, while the mechanism of action in vivo is still not fully understood. METHODS Effector molecules important for tumor defense were analyzed before and at day 5 after rituximab treatment via flow cytometry. Serum rituximab levels were measured with an ELISA. RESULTS We evaluated patient parameters that may affect treatment response in relation to rituximab administration and serum rituximab levels. We indeed found a reduction of Fcγ receptor (FcγR) II levels after rituximab treatment in monocyte subtypes, whereas FcγRI expression was significantly increased. Serum levels of proinflammatory marker proteins S100A8/A9 and S100A12 significantly decreased after treatment to normal levels from an overall proinflammatory state before treatment. CD57, perforin, and granzyme B expression decreased after treatment, comprising a less cytolytic natural killer (NK) cell population. CONCLUSION The highlighted effects of rituximab treatment on patient's immune response help in understanding the biology behind tumor defense mechanisms and effector function. After subsequent studies, these novel insights might be translated into patient care and could contribute to improve treatment of pediatric patients with mature aggressive B-cell lymphoma.
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Affiliation(s)
- Maria Bethke
- Pediatric Hematology and Oncology, University Children's Hospital Muenster, Münster, Germany
| | - Georg Varga
- Department of Pediatric Rheumatology and Immunology, University Hospital Muenster, Münster, Germany
| | - Toni Weinhage
- Department of Pediatric Rheumatology and Immunology, University Hospital Muenster, Münster, Germany
| | - Harshana Sabharwal
- Pediatric Hematology and Oncology, University Children's Hospital Muenster, Münster, Germany
| | - Karin Mellgren
- Department of Pediatric Oncology and Hematology, Sahlgrenska University Hospital, The Queen Silvia Children's Hospital, Gothenburg, Sweden
| | - Gerrit Randau
- Pediatric Hematology and Oncology, University Children's Hospital Muenster, Münster, Germany
| | - Meike Rolfing
- Pediatric Hematology and Oncology, University Children's Hospital Muenster, Münster, Germany
| | - Helmut Wittkowski
- Department of Pediatric Rheumatology and Immunology, University Hospital Muenster, Münster, Germany
| | - Dirk Foell
- Department of Pediatric Rheumatology and Immunology, University Hospital Muenster, Münster, Germany
| | - Ulf Michgehl
- Pediatric Hematology and Oncology, University Children's Hospital Muenster, Münster, Germany
| | - Birgit Burkhardt
- Pediatric Hematology and Oncology, University Children's Hospital Muenster, Münster, Germany
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Grunst MW, Grandea AG, Janaka SK, Hammad I, Grimes P, Karl JA, Wiseman R, O'Connor DH, Evans DT. Functional Interactions of Common Allotypes of Rhesus Macaque FcγR2A and FcγR3A with Human and Macaque IgG Subclasses. THE JOURNAL OF IMMUNOLOGY 2020; 205:3319-3332. [PMID: 33208458 DOI: 10.4049/jimmunol.2000501] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 10/17/2020] [Indexed: 12/18/2022]
Abstract
The rhesus macaque is an important animal model for AIDS and other infectious diseases. However, the investigation of Fc-mediated Ab responses in macaques is complicated by species-specific differences in FcγRs and IgG subclasses relative to humans. To assess the effects of these differences on FcγR-IgG interactions, reporter cell lines expressing common allotypes of human and rhesus macaque FcγR2A and FcγR3A were established. FcγR-mediated responses to B cells were measured in the presence of serial dilutions of anti-CD20 Abs with Fc domains corresponding to each of the four subclasses of human and rhesus IgG and with Fc variants of IgG1 that enhance binding to FcγR2A or FcγR3A. All of the FcγRs were functional and preferentially recognized either IgG1 or IgG2. Whereas allotypes of rhesus FcγR2A were identified with responses similar to variants of human FcγR2A with higher (H131) and lower (R131) affinity for IgG, all of the rhesus FcγR3A allotypes exhibited responses most similar to the higher affinity V158 variant of human FcγR3A. Unlike responses to human IgGs, there was little variation in FcγR-mediated responses to different subclasses of rhesus IgG. Phylogenetic comparisons suggest that this reflects limited sequence variation of macaque IgGs as a result of their relatively recent diversification from a common IGHG gene since humans and macaques last shared a common ancestor. These findings reveal species-specific differences in FcγR-IgG interactions with important implications for investigating Ab effector functions in macaques.
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Affiliation(s)
- Michael W Grunst
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and
| | - Andres G Grandea
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and.,Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715
| | - Sanath Kumar Janaka
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and
| | - Iman Hammad
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and
| | - Parker Grimes
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and
| | - Julie A Karl
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715
| | - Roger Wiseman
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715
| | - David H O'Connor
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and.,Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715
| | - David T Evans
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705; and .,Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715
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4
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Lee C, Peddi S, Anderson C, Su H, Cui H, Epstein AL, MacKay JA. Adaptable antibody Nanoworms designed for non-Hodgkin lymphoma. Biomaterials 2020; 262:120338. [PMID: 32916604 DOI: 10.1016/j.biomaterials.2020.120338] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/10/2020] [Accepted: 08/17/2020] [Indexed: 12/13/2022]
Abstract
Despite advancements in antibody-based therapies for non-Hodgkin lymphoma (NHL), at least two major therapeutic needs remain unmet: i) heterogenous activation of host immunity towards B cell NHL; and ii) lack of antibody-based therapeutics for T cell NHL. This study explores the molecular characteristics of an adaptable modality called antibody Nanoworms and demonstrates their receptor clustering activity as a means to overcome and address abovementioned needs. To test this, four selected therapeutic receptors of B cell (CD19, CD20, HLA-DR10) and T cell (CD3) NHL were targeted by Nanoworms. Regardless of the target or the cell type, Nanoworms inherently clustered bound receptors on the cell-surface through their multivalency and activated intracellular signaling without any secondary crosslinker. As a sole agent, Nanoworms induced apoptosis by clustering CD20 or HLA-DR10, and arrested the cell cycle upon CD19 clustering. Interestingly, CD3 clustering was particularly advantageous in inducing activation-induced cell death (AICD) in an aggressive form of T cell NHL named Sézary syndrome that is fatal, limited in antibody-based therapeutics, and has poor outcomes to traditional chemotherapy. As Nanoworms can be easily designed to target any receptor for which a scFv is available, they may provide solutions and add therapeutic novelty to underserved diseases.
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Affiliation(s)
- Changrim Lee
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, 90089, United States
| | - Santosh Peddi
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, 90089, United States
| | - Caleb Anderson
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Hao Su
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Alan L Epstein
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90089, United States
| | - J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, 90089, United States; Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, 90089, United States; Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90089, United States.
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5
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Li Y, Huang K, Liu L, Qu Y, Huang Y, Wu Y, Wei J. Effects of complement and serum IgG on rituximab-dependent natural killer cell-mediated cytotoxicity against Raji cells. Oncol Lett 2018; 17:339-347. [PMID: 30655772 PMCID: PMC6313095 DOI: 10.3892/ol.2018.9630] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 10/04/2018] [Indexed: 12/24/2022] Open
Abstract
Accumulating evidence indicates that the anti-CD20 monoclonal antibody rituximab significantly improves the clinical prognosis of patients with non-Hodgkin lymphoma and chronic lymphocytic leukemia. However, a number of patients relapse or fail to respond to rituximab. To further understand the cause of this, polymorphisms of FcγRIIIa were initially detected in healthy volunteers. Subsequently, the rituximab-dependent natural killer (NK) cell-mediated cytotoxicity of different FcγRIIIa genotypes was assessed by a cytotoxicity assay in vitro. Ultimately, the effect of human serum immunoglobulin (Ig) G and complement on rituximab-dependent NK cell-mediated cytotoxicity was evaluated in vitro. It was revealed that FcγRIIIa polymorphisms were associated with the antibody-dependent cell-mediated cytotoxicity (ADCC) of NK cells. In addition, the ADCC of NK cells with FcγRIIIa-158 V/V was increased compared with that of FcγRIIIa-158 V/F. The serum IgG and rituximab Fc segment was able to bind competitively with NK cell FcγRIIIa. It was observed that serum IgG inhibited, whereas complement enhanced rituximab-induced NK-cell mediated ADCC. Therefore, various agents administered synchronously with rituximab may modulate the efficacy of this agent and ultimately its toxicity against tumor cells.
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Affiliation(s)
- Yang Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Ke Huang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Ling Liu
- Department of Pediatric, Affiliatied Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524000, P.R. China
| | - Yuhua Qu
- Department of Pediatrics, Guang Zhou Women and Children's Medical Center, Guangzhou, Guangdong 510120, P.R. China
| | - Yan Huang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Department of Pediatric Hematology/Oncology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Yanfeng Wu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Biotherapy Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Jing Wei
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China.,Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
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6
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The FCGR3A polymorphism predicts the response to rituximab-based therapy in patients with non-Hodgkin lymphoma: a meta-analysis. Ann Hematol 2016; 95:1483-90. [PMID: 27431582 DOI: 10.1007/s00277-016-2723-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 06/03/2016] [Indexed: 12/16/2022]
Abstract
Epidemiological studies have assessed the association between Fc gamma receptor IIIA (FCGR3A) 158 V/F and the response to rituximab-based therapy in patients with non-Hodgkin lymphoma (NHL), but the findings have been inconsistent. We performed this meta-analysis to obtain a better assessment of this relationship. Electronic database searches were conducted for relevant studies. A pooled odds ratio (OR) with a 95 % confidence interval (95 % CI) was used to assess the strength of the association. Analyses of the subgroup and publication bias were conducted. A total of 10 studies involving 1050 patients were analyzed. In all the genetic models, no clear relationship was found between the FCGR3A 158 V/F polymorphism and the response to rituximab-based therapy in NHL patients. When categorized by ethnicity, Asian individuals with the FCGR3A 158 V/V allele (OR = 4.37; 95 % CI = 1.07-17.73; P = 0.039) or the non-F/(FV + VV) (OR = 2.50; 95 % CI = 1.04-5.98; P = 0.040) allele have a significantly higher complete response rate (CR) compared to FF individuals. No obvious heterogeneities were observed. In addition, no statistical evidence for a publication bias was found. Our study suggested that the FCGR3A 158 V/F polymorphism can predict the treatment response to rituximab-based chemotherapy in NHL patients, especially for Asian individuals.
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7
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Rožman S, Novaković S, Grabnar I, Cerkovnik P, Novaković BJ. The impact of FcγRIIa and FcγRIIIa gene polymorphisms on responses to RCHOP chemotherapy in diffuse large B-cell lymphoma patients. Oncol Lett 2016; 11:3332-3336. [PMID: 27123112 PMCID: PMC4841119 DOI: 10.3892/ol.2016.4402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 03/01/2016] [Indexed: 01/18/2023] Open
Abstract
Rituximab is a monoclonal antibody routinely used in the treatment of B-cell non-Hodgkin lymphomas. It mediates antibody-dependent cellular cytotoxicity of B lymphocytes by bridging them with Fcγ receptors (FcγR) on effector cells. Several polymorphisms in the FcγR genes have been identified to influence rituximab binding to FcγR, thus altering its antitumor effect in indolent lymphomas. In the present study, the impact of FcγRIIa and FcγRIIIa polymorphisms on the survival and response to immunochemotherapy consisting of rituximab, cyclophosphamide, doxorubicin, vincristine and prednisone was evaluated in diffuse large B-cell lymphoma (DLBCL) patients. A total of 29 Slovenian DLBCL patients were studied. Genotyping was conducted for FcγRIIa-27, FcγRIIa-131, FcγRIIIa-48 and FcγRIIIa-158 polymorphisms. The median follow-up time was 29.7 months (range, 9.7–45.4 months). No significant impact of the genotypes was observed on the treatment response, progression-free or overall survival of DLBCL patients. There was a non-significant trend of an improved response to chemotherapy without additional irradiation in patients homozygous for Val at FCγIIIa-158 compared to Phe carriers. The findings of the present study indicate that FcγR polymorphisms have no influence on the survival of DLBCL patients.
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Affiliation(s)
- Samo Rožman
- Department of Pharmacy, Institute of Oncology Ljubljana, Ljubljana 1000, Slovenia
| | - Srdjan Novaković
- Department of Molecular Diagnostics, Institute of Oncology Ljubljana, Ljubljana 1000, Slovenia
| | - Iztok Grabnar
- Department of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, University of Ljubljana, Ljubljana 1000, Slovenia
| | - Petra Cerkovnik
- Department of Molecular Diagnostics, Institute of Oncology Ljubljana, Ljubljana 1000, Slovenia
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8
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Seret G, Hanrotel C, Bendaoud B, Le Meur Y, Renaudineau Y. Homozygous FCGR3A-158F mutation is associated with delayed B-cell depletion following rituximab but with preserved efficacy in a patient with refractory lupus nephritis. Clin Kidney J 2012; 6:74-76. [PMID: 27818754 PMCID: PMC5094396 DOI: 10.1093/ckj/sfs162] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Accepted: 10/23/2012] [Indexed: 01/16/2023] Open
Abstract
Rituximab (RTX), an anti-CD20 monoclonal antibody, has shown promising results in a small group of systemic lupus erythematosus (SLE) patients treated for lupus nephritis (LN). However, such observations were not confirmed in the double-blind LUNAR study. Accordingly, the factors associated with the clinical response remain to be characterized. We report the case of a young woman with known LN successfully re-treated with RTX and steroids and homozygous for the low-affinity FCG3RA 158F genotype. Although B-cell depletion was delayed, complete remission with anti-DNA antibody negativity and proteinuria normalization were maintained for 5 years. The implications for disease pathogenesis and clinical monitoring are discussed.
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Affiliation(s)
- Guillaume Seret
- EA2216 Immunology and Pathology, European University of Brittany, Brest, France; Laboratory of Immunology, Brest University Medical School, CHRU Morvan,Brest, France; Unit of Nephrology, Brest University Medical School, CHRU Cavale Blanche, Brest, France
| | - Catherine Hanrotel
- Unit of Nephrology , Brest University Medical School, CHRU Cavale Blanche , Brest , France
| | - Boutahar Bendaoud
- EA2216 Immunology and Pathology, European University of Brittany, Brest, France; Laboratory of Immunology, Brest University Medical School, CHRU Morvan,Brest, France
| | - Yannick Le Meur
- EA2216 Immunology and Pathology, European University of Brittany, Brest, France; Unit of Nephrology, Brest University Medical School, CHRU Cavale Blanche, Brest, France
| | - Yves Renaudineau
- EA2216 Immunology and Pathology, European University of Brittany, Brest, France; Laboratory of Immunology, Brest University Medical School, CHRU Morvan,Brest, France
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RAMÍREZ JULIO, FERNÁNDEZ-SUEIRO JOSÉLUIS, LÓPEZ-MEJÍAS RAQUEL, MONTILLA CARLOS, ARIAS MAITE, MOLL CONCEPCIÓN, ALSINA MERCÉ, SANMARTI RAIMON, LOZANO FRANCISCO, CAÑETE JUAND. FCGR2A/CD32AandFCGR3A/CD16AVariants and EULAR Response to Tumor Necrosis Factor-α Blockers in Psoriatic Arthritis: A Longitudinal Study with 6 Months of Followup. J Rheumatol 2012; 39:1035-41. [DOI: 10.3899/jrheum.110980] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Objective.The efficacy of antibody-based biological therapies currently used in psoriatic arthritis (PsA) depends not only on their blocking effect on the targeted molecule but also on their binding affinity to genetically defined variants of cell-surface Fc-γ receptors. Our objective was to assess the potential influence of functionally relevantFCGR2A/CD32A(H131R) andFCGR3A/CD16A(V158F) genetic polymorphisms on the EULAR response to tumor necrosis factor-α (TNF-α) blocker therapy in PsA.Methods.In total 103 patients with PsA starting anti-TNF-α therapy were included. The efficacy of therapy was evaluated according to EULAR response criteria at 3 and 6 months.FCGR2A-R131H andFCGR3A-F158V polymorphisms were genotyped. Potential correlations between clinical response and theFCGR2A-R131H andFCGR3A-F158V polymorphisms were evaluated.Results.EULAR response (moderate plus good) was 85.4% at 3 months and 87.4% at 6 months, while good EULAR response was 61.2% and 62.1%, respectively. More patients with high-affinityFCGR2Agenotypes (homozygous or heterozygous combinations) achieved a EULAR response at 6 months compared to patients with the low-affinity genotype (RR; p = 0.034, adjusted comparison error rate < 0.025). This association was due mainly to the group of patients treated with etanercept. No correlation was found for theFCGR3Apolymorphism. Similarly, no effect of C-reactive protein levels was observed.Conclusion.Our data indicate thatFCGR2Apolymorphism may influence the response to TNF-α blockers (namely etanercept) in PsA in a direction opposite to that previously found in patients with rheumatoid arthritis.
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10
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Fc receptor-targeted therapies for the treatment of inflammation, cancer and beyond. Nat Rev Drug Discov 2012; 11:311-31. [PMID: 22460124 DOI: 10.1038/nrd2909] [Citation(s) in RCA: 256] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The direct or indirect targeting of antibody Fc receptors (FcRs) presents unique opportunities and interesting challenges for the treatment of inflammatory diseases, cancer and infection. Biological responses induced via the Fc portions of antibodies are powerful, complex and unusual, and comprise both activating and inhibitory effects. These properties can be exploited in the engineering of therapeutic monoclonal antibodies to improve their activity in vivo. FcRs have also emerged as key participants in the pathogenesis of several important autoimmune diseases, including systemic lupus erythematosus and rheumatoid arthritis. Therapeutic approaches based on antagonizing FcR function with small molecules or biological drugs such as monoclonal antibodies and recombinant soluble FcR ectodomains have gained momentum. This Review addresses various strategies to manipulate FcR function to overcome immune complex-mediated inflammatory diseases, and considers approaches to improve antibody-based anticancer therapies.
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11
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Wang LH, Wang N, Lu XY, Liu BC, Yanda MK, Song JZ, Dai HM, Sun YL, Bao HF, Eaton DC, Ma HP. Rituximab inhibits Kv1.3 channels in human B lymphoma cells via activation of FcγRIIB receptors. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2011; 1823:505-13. [PMID: 22192444 DOI: 10.1016/j.bbamcr.2011.11.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 10/17/2011] [Accepted: 11/29/2011] [Indexed: 01/08/2023]
Abstract
Kv1.3 channels play an important role in modulating lymphocyte proliferation and apoptosis. We hypothesized that Kv1.3 channels in B lymphocytes might be regulated by rituximab, an antibody to CD20, a drug for treatments of B-cell lymphomas and autoimmune diseases. Using both whole-cell and cell-attached patch-clamp techniques, we found that rituximab inhibited Kv1.3 channels in Daudi human B lymphoma cells by promoting the channel inactivation at a concentration which was much greater than that required for activation of CD20. The effect of rituximab on Kv1.3 channels was abolished after selective blockade of FcγRIIB receptors with anti-FcγRIIB antibody. Western blot experiments showed that Daudi B cells expressed both Kv1.3 channel and the low affinity Fc receptor, FcγRIIB, which could be activated by the Fc region of rituximab. In contrast, normal lymphocytes expressed less Kv1.3 channels with faster inactivation. Confocal microscopy and flow cytometry data showed that rituximab induced apoptosis of Daudi B cells and that the effect was attenuated by blockade of FcγRIIB receptors and partially mimicked by inhibition of Kv1.3 channels. These results suggest that in addition to previously described complement-dependent cytotoxicity, rituximab also induces apoptosis of malignant B lymphocyte by stimulating FcγRIIB receptors and inhibiting Kv1.3 channels.
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Affiliation(s)
- Li-Hua Wang
- Department of Neurology, the Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, People's Republic of China
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12
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Treon SP. Fcγ Receptor Predictive Genomic Testing and the Treatment of Indolent Non-Hodgkin Lymphoma. CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2010; 10:321-2. [DOI: 10.3816/clml.2010.n.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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