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Qian J, Wang Q, Xiao L, Xiong W, Xian M, Su P, Yang M, Zhang C, Li Y, Zhong L, Ganguly S, Zu Y, Yi Q. Development of therapeutic monoclonal antibodies against DKK1 peptide-HLA-A2 complex to treat human cancers. J Immunother Cancer 2024; 12:e008145. [PMID: 38267222 PMCID: PMC10824003 DOI: 10.1136/jitc-2023-008145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2024] [Indexed: 01/26/2024] Open
Abstract
BACKGROUND Targeted immunotherapy with monoclonal antibodies (mAbs) is an effective and safe method for the treatment of malignancies. Development of mAbs with improved cytotoxicity, targeting new and known tumor-associated antigens, therefore continues to be an active research area. We reported that Dickkopf-1 (DKK1) is a good target for immunotherapy of human cancers based on its wide expression in different cancers but not in normal tissues. As DKK1 is a secreted protein, mAbs binding directly to DKK1 have limited effects on cancer cells in vivo. METHODS The specificity and antibody-binding capacity of DKK1-A2 mAbs were determined using indirect ELISA, confocal imaging, QIFIKIT antibody-binding capacity and cell surface binding assays. The affinity of mAbs was determined using a surface plasmon resonance biosensor. A flow cytometry-based cell death was performed to detect tumor cell apoptosis. Antibody-dependent cellular cytotoxicity (ADCC) and complement-dependent cytotoxicity (CDC) assays were used to evaluate the ability of DKK1-A2 mAbs to mediate ADCC and CDC activities against tumor cells in vitro. Flow cytometry data were collected with an FACSymphony A3 cell analyzer and analyzed with FlowJo V.10.1 software. Human cancer xenograft mouse models were used to determine the in vivo therapeutic efficacy and the potential safety and toxicity of DKK1-A2 mAbs. In situ TUNEL assay was performed to detect apoptosis in tumors and mouse organs. RESULTS We generated novel DKK1-A2 mAbs that recognize the DKK1 P20 peptide presented by human HLA-A*0201 (HLA-A2) molecules (DKK1-A2 complexes) that are naturally expressed by HLA-A2+DKK1+ cancer cells. These mAbs directly induced apoptosis in HLA-A2+DKK1+ hematologic and solid cancer cells by activating the caspase-9 cascade, effectively lysed the cancer cells in vitro by mediating CDC and ADCC and were therapeutic against established cancers in their xenograft mouse models. As DKK1 is not detected in most human tissues, DKK1-A2 mAbs neither bound to or killed HLA-A2+ blood cells in vitro nor caused tissue damage in tumor-free or tumor-bearing HLA-A2-transgenic mice. CONCLUSION Our study suggests that DKK1-A2 mAbs may be a promising therapeutic agent to treat human cancers.
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Affiliation(s)
- Jianfei Qian
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Qiang Wang
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Liuling Xiao
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Wei Xiong
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Miao Xian
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Pan Su
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Maojie Yang
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Chuanchao Zhang
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Yabo Li
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Ling Zhong
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
| | - Siddhartha Ganguly
- Houston Methodist Neal Cancer Center, Houston Methodist Research Institute, Houston, TX, USA
| | - Youli Zu
- Department of Pathology and Genomic Medicine, Institute for Academic Medicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Qing Yi
- Center for Translational Research in Hematological Malignancies, Houston Methodist Neal Cancer Center/Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA
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Houvast RD, Vankemmelbeke M, Durrant LG, Wuhrer M, Baart VM, Kuppen PJK, de Geus-Oei LF, Vahrmeijer AL, Sier CFM. Targeting Glycans and Heavily Glycosylated Proteins for Tumor Imaging. Cancers (Basel) 2020; 12:cancers12123870. [PMID: 33371487 PMCID: PMC7767531 DOI: 10.3390/cancers12123870] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Distinguishing malignancy from healthy tissue is essential for oncologic surgery. Targeted imaging during an operation aids the surgeon to operate better. The present tracers for detecting cancer are directed against proteins that are overexpressed on the membrane of tumor cells. This review evaluates the use of tumor-associated sugar molecules as an alternative for proteins to image cancer tissue. These sugar molecules are present as glycans on glycosylated membrane proteins and glycolipids. Due to their location and large numbers per cell, these sugar molecules might be better targets for tumor imaging than proteins. Abstract Real-time tumor imaging techniques are increasingly used in oncological surgery, but still need to be supplemented with novel targeted tracers, providing specific tumor tissue detection based on intra-tumoral processes or protein expression. To maximize tumor/non-tumor contrast, targets should be highly and homogenously expressed on tumor tissue only, preferably from the earliest developmental stage onward. Unfortunately, most evaluated tumor-associated proteins appear not to meet all of these criteria. Thus, the quest for ideal targets continues. Aberrant glycosylation of proteins and lipids is a fundamental hallmark of almost all cancer types and contributes to tumor progression. Additionally, overexpression of glycoproteins that carry aberrant glycans, such as mucins and proteoglycans, is observed. Selected tumor-associated glyco-antigens are abundantly expressed and could, thus, be ideal candidates for targeted tumor imaging. Nevertheless, glycan-based tumor imaging is still in its infancy. In this review, we highlight the potential of glycans, and heavily glycosylated proteoglycans and mucins as targets for multimodal tumor imaging by discussing the preclinical and clinical accomplishments within this field. Additionally, we describe the major advantages and limitations of targeting glycans compared to cancer-associated proteins. Lastly, by providing a brief overview of the most attractive tumor-associated glycans and glycosylated proteins in association with their respective tumor types, we set out the way for implementing glycan-based imaging in a clinical practice.
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Affiliation(s)
- Ruben D. Houvast
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Mireille Vankemmelbeke
- Scancell Limited, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK; (M.V.); (L.G.D.)
| | - Lindy G. Durrant
- Scancell Limited, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK; (M.V.); (L.G.D.)
- Division of Cancer and Stem Cells, School of Medicine, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands;
| | - Victor M. Baart
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Peter J. K. Kuppen
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Lioe-Fee de Geus-Oei
- Department of Radiology, Section of Nuclear Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands;
- Biomedical Photonic Imaging Group, University of Twente, 7500 AE Enschede, The Netherlands
| | - Alexander L. Vahrmeijer
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Cornelis F. M. Sier
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
- Percuros BV, 2333 ZA Leiden, The Netherlands
- Correspondence: ; Tel.: +31-752662610
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Guo L, Sun X, Hao Z, Huang J, Han X, You Y, Li Y, Shen M, Ozawa T, Kishi H, Muraguchi A, Jin A. Identification of Novel Epitopes with Agonistic Activity for the Development of Tumor Immunotherapy Targeting TRAIL-R1. J Cancer 2017; 8:2542-2553. [PMID: 28900492 PMCID: PMC5595084 DOI: 10.7150/jca.19918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 05/30/2017] [Indexed: 02/07/2023] Open
Abstract
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) receptor-1/2 (TRAIL-R1/R2), also known as death receptors, are expressed in a wide variety of tumor cells. Although TRAIL can induce cell apoptosis by engaging its cognate TRAIL-R1/R2, some tumor cells are or become resistant to TRAIL treatment. Monoclonal antibodies (mAbs) against TRAIL-R1/R2 have been developed to use as potential antitumor therapeutic agents instead of TRAIL. However, TRAIL-R1/R2-based tumor therapy has not yet been realized. We previously generated a series of fully human monoclonal antibodies against TRAIL-R1 (TR1-mAbs) that induced tumor cell apoptosis. In this study, we identified the antigenic binding sites of these TR1-mAbs and proposed two major epitopes on the extracellular domain of TRAIL-R1. The analysis revealed that the epitopes of some TR1-mAbs partially overlaps with the beginning of TRAIL-binding sites, and other epitopes are located within the TRAIL-binding region. Among these mAbs, TR1-422 and TR1-419 mAbs have two antigenic binding sites that bound to the same binding region, but they have different essential amino acid residues and binding site sizes. Furthermore, we investigated the apoptosis activity of TR1-419 and TR1-422 mAbs in the form of IgG and IgM. In contrast to the IgG-type TR1-419 and TR1-422 mAbs, which enhanced and inhibited TRAIL-induced apoptosis, respectively, both IgM-type TR1-419 and TR1-422 mAb strongly induced cell apoptosis with or without soluble TRAIL (sTRAIL). Moreover, the results showed that IgM-type TR1-419 and TR1-422 mAbs alone can sufficiently activate the extrinsic and intrinsic apoptosis signaling pathways and suppress tumor growth in vivo. Consequently, we identified two antigenic binding sites with agonistic activity, and their specific IgM-type mAbs exhibited strong cytotoxic activity in tumor cells in vitro and in vivo. Thus, these agonistic antigenic binding sites may be useful for the development of effective Ab-based drugs or Ab-based cell immunotherapy for various human solid tumors.
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Affiliation(s)
- Lu Guo
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China.,Department of Basic Medical Sciences, Heilongjiang Nursing College, Harbin, Heilongjiang 150086, China
| | - Xin Sun
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Zhichao Hao
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Jingjing Huang
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Xiaojian Han
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Yajie You
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Yaying Li
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Meiying Shen
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150000, China
| | - Tatsuhiko Ozawa
- Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Hiroyuki Kishi
- Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Atsushi Muraguchi
- Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Aishun Jin
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150081, China
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Abstract
Multiple myeloma (MM) is a B-cell malignancy characterized by the clonal proliferation of malignant plasma cells in the bone marrow and the development of osteolytic bone lesions. MM has emerged as a paradigm within the cancers for the success of drug discovery and translational medicine. This article discusses immunotherapy as an encouraging option for the goal of inducing effective and long-lasting therapeutic outcome. Divided into two distinct approaches, passive or active, immunotherapy, which targets tumor-associated antigens has shown promising results in multiple preclinical and clinical studies.
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Affiliation(s)
- Jooeun Bae
- Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA.
| | - Nikhil C Munshi
- Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA
| | - Kenneth C Anderson
- Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA
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Chiou SJ, Chen CH. Decipher β2-microglobulin: gain- or loss-of-function (a mini-review). Med Sci Monit Basic Res 2013; 19:271-3. [PMID: 24146000 PMCID: PMC3853100 DOI: 10.12659/msmbr.889457] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
β2-microglobulin (β2M) functions as a chaperon to maintain structural stability of MHC class I complex that is associated with antigen presentation to cytotoxic (CD8+) T lymphocytes. Cancerous cells in β2M loss-of-function are thought to avoid immune surveillance. As increased level of β2M present in tissue/serum is significantly associated with tumor status in various cancers, β2M may become an important prognostic and survival factor in a range of malignancies. It is believed that β2M acts as hormone-like molecule to trigger a pleiotropic signaling via a ligand-to-receptor binding mechanism. Anti- β2M monoclonal antibodies successfully induce apoptosis in malignant cells, suggesting a surprising therapeutic approach. Of note, β2M is largely localized in the cytoplasm of advanced oral cavity squamous cell carcinoma (OCSCC), in contrast to that in the plasma membrane of normal oral mucosa. This suggests that β2M-derived intracellular signaling might be preceded by its accumulation in the cytoplasm of epithelial cells of tumors. Hence, translocation of β2M from cell surface to cytoplasm in advanced tumors may shed light on the mechanism of β2M-mediated tumorigenesis.
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Affiliation(s)
- Shean-Jaw Chiou
- Department of Biochemistry, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Taiwan
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Pokrass MJ, Liu MF, Lindorfer MA, Taylor RP. Activation of complement by monoclonal antibodies that target cell-associated β₂-microglobulin: implications for cancer immunotherapy. Mol Immunol 2013; 56:549-60. [PMID: 23911412 DOI: 10.1016/j.molimm.2013.05.242] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 05/31/2013] [Indexed: 01/14/2023]
Abstract
β₂-Microglobulin (β2M), the light chain of the class I major histocompatibilty complex (MHC-I), is a promising tumor target for monoclonal antibodies (mAbs) in cancer immunotherapy. Several reports indicate that chelation of cell-associated β2M by specific mouse mAbs promotes tumor cell destruction by inducing apoptosis or other cytotoxic signaling pathways. Human mAbs employed in cancer therapy are usually IgG1, which mediates cell-killing by effector mechanisms including complement dependent cytotoxicity (CDC). The analogous mouse IgG2a and IgG2b isotypes are similarly effective in activating complement. Therefore, we examined the complement-activating properties of anti-β2M mouse mAbs 1B749 (IgG2a) and HB28 (IgG2b) when either mAb was bound to tumor cell lines or normal cells; we compared these β2M-specific mAbs with mouse mAb W6/32 (IgG2a), specific for human leukocyte antigens in the MHC-I heavy chain. All three mAbs bind to most human cell lines and normal cells in approximately equal amounts, consistent with a 1:1 stoichiometry for the HLA heavy chain in association with β2M. The three mAbs promote rapid C3b deposition and substantial CDC of human cell lines, and mAbs 1B749 and W6/32 have robust cytotoxic activity on reaction with normal mononuclear cells and platelets. Curiously, mAb HB28 induces modest C3b deposition and little CDC of normal cells, and its weaker complement-fixing activity was confirmed by ELISA. Based on these findings, we suggest that human IgG mAbs that target β2M for cancer immunotherapy be selected or engineered so as not to activate complement, thus eliminating the potential adverse effects of complement-mediated lysis of normal cells.
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Affiliation(s)
- Michael J Pokrass
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, VA, USA
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Allegra A, Penna G, Alonci A, Russo S, Greve B, Innao V, Minardi V, Musolino C. Monoclonal antibodies: potential new therapeutic treatment against multiple myeloma. Eur J Haematol 2013; 90:441-68. [DOI: 10.1111/ejh.12107] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2013] [Indexed: 12/12/2022]
Affiliation(s)
| | - Giuseppa Penna
- Division of Haematology; University of Messina; Messina; Italy
| | - Andrea Alonci
- Division of Haematology; University of Messina; Messina; Italy
| | - Sabina Russo
- Division of Haematology; University of Messina; Messina; Italy
| | - Bruna Greve
- Division of Haematology; University of Messina; Messina; Italy
| | - Vanessa Innao
- Division of Haematology; University of Messina; Messina; Italy
| | - Viviana Minardi
- Division of Haematology; University of Messina; Messina; Italy
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Danylesko I, Beider K, Shimoni A, Nagler A. Monoclonal antibody-based immunotherapy for multiple myeloma. Immunotherapy 2013; 4:919-38. [PMID: 23046236 DOI: 10.2217/imt.12.82] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Multiple myeloma (MM) is a life-threatening hematological malignancy. High-dose chemotherapy followed by autologous stem cell transplantation is a relatively effective treatment, but disease recurrence remains a major obstacle. Allogeneic transplantation may result in durable responses and cure due to antitumor immunity mediated by donor lymphocytes. However, morbidity and mortality related to graft-versus-host disease remain a challenge. Recent advances in understanding the interaction between the immune system of the patient and the malignant cells are influencing the design of clinically more efficient study protocols for MM. This review will focus on MM antigens and their specific antibodies. These monoclonal antibodies are an attractive therapeutic tool for MM humoral immunotherapy, with most promising preclinical results.
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Affiliation(s)
- Ivetta Danylesko
- Division of Hematology, Bone Marrow Transplantation & Cord Blood Bank, Chaim Sheba Medical Center, Tel Hashomer & Tel Aviv University, Tel Aviv, Israel
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Xiong H, Liang AB, Xiu B, Fu JF, Ding Y, Chen YH. N-Propionyl polysialic acid precursor enhances the susceptibility of multiple myeloma to antitumor effect of anti-NprPSA monoclonal antibody. Acta Pharmacol Sin 2012; 33:1557-62. [PMID: 23123647 DOI: 10.1038/aps.2012.91] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
AIM To study the antitumor effect of anti-NprPSA monoclonal antibody (mAb) in combination with ManNPr, a precursor of N-propionyl PSA, in multiple myeloma (MM), and to explore the mechanisms of the action. METHODS Human multiple myeloma cell line RPMI-8226 was tested. The cells were pre-treated with ManNPr (1, 2, and 4 mg/mL), and then incubated with anti-NprPSA mAb (1 mg/mL). Cell apoptosis in vitro was detected using MTT assay and flow cytometry. BALB/c nude mice were inoculated sc with RPC5.4 cells. On 5 d after the injection, the mice were administered sc with anti-NprPSA mAb (200 μg/d) and ManNPr (5 mg/d) for 8 d. The tumor size and body weight were monitored twice per week. TUNEL assay was used for detecting apoptosis in vivo. The apoptotic pathway involved was examined using Western blot analysis and caspase inhibitor. RESULTS Treatment of RPMI-8226 cells with anti-NprPSA mAb alone failed to inhibit cell growth in vitro. In RPMI-8226 cells pretreated with ManNPr, however, the mAb significantly inhibited the cell proliferation, decreased the viability, and induced apoptosis, which was associated with cleavage of caspase-3, caspase-8, caspase-9, and poly(ADP-ribose) polymerase. In the mouse xenograft model, treatment with the mAb in combination with ManNPr significantly inhibited the tumor growth, and induced significant apoptosis as compared to treatment with the mAb alone. Moreover, apoptosis induced by the mAb in vivo resulted from the activation of the caspases and poly(ADP-ribose) polymerase. CONCLUSION The anti-NprPSA mAb in combination with ManNPr is an effective treatment for in vitro and in vivo induction of apoptosis in multiple myeloma.
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Prostate Cancer and Immunoproteome: Awakening and Reprogramming the Guardian Angels. Arch Immunol Ther Exp (Warsz) 2012; 60:191-8. [DOI: 10.1007/s00005-012-0169-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Accepted: 03/07/2012] [Indexed: 12/24/2022]
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