Production of a High-affinity Monoclonal Antibody Reactive with Folate Receptors Alpha and Beta.

In this study, we developed a MAb that recognizes both FRα and FRβ (anti-FRαβ). The anti-FRαβ specifically stained trophoblasts and macrophages from human placenta, synovial macrophages from rheumatoid arthritis patient, liver macrophages from cynomolgus monkey and common marmoset, and cancer cells and tumor-associated macrophages from ovary and lung carcinomas. Surface plasmon resonance showed that the anti-FRαβ bound to soluble forms of the FRα and FRβ proteins with high affinity (KD=6.26×10(-9) M and 4.33×10(-9) M, respectively). In vitro functional analysis of the anti-FRαβ showed that this MAb mediates complement-dependent cytotoxicity, antibody-dependent cellular cytotoxicity, and antibody-dependent cellular phagocytosis of FRα-expressing and FRβ-expressing cell lines. The anti-FRαβ MAb is a promising therapeutic candidate for cancers in which macrophages promote tumor progression. PMID: 26090596 [PubMed - in process]
Source: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy - Category: Microbiology Tags: Monoclon Antib Immunodiagn Immunother Source Type: research

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Discussion MDSCs violently emerge in pathological conditions in an attempt to limit potentially harmful immune and inflammatory responses. Mechanisms supporting their expansion and survival are deeply investigated in cancer, in the perspective to reactivate specific antitumor responses and prevent their contribution to disease evolution. These findings will likely contribute to improve the targeting of MDSCs in anticancer immunotherapies, either alone or in combination with immune checkpoint inhibitors. New evidence indicates that the expansion of myeloid cell differentiation in pathology is subject to fine-tuning, as its...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Gulcin Tezcan1, Ekaterina V. Martynova1, Zarema E. Gilazieva1, Alan McIntyre2, Albert A. Rizvanov1 and Svetlana F. Khaiboullina1,3* 1Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia 2Centre for Cancer Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham, United Kingdom 3Department of Microbiology and Immunology, University of Nevada, Reno, Reno, NV, United States Inflammation has a crucial role in protection against various pathogens. The inflammasome is an intracellular multiprotein signaling complex that is linked to pathogen sensing and...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
Conclusions This review describes how leukocyte-heparanase can be a double-edged sword in tumor progression; it can enhance tumor immune surveillance and tumor cell clearance, but also promote tumor survival and growth. We also discuss the potential of using heparanase in leukocyte therapies against tumors, and the effects of heparanase inhibitors on tumor progression and immunity. We are just beginning to understand the influence of heparanase on a pro/anti-tumor immune response, and there are still many questions to answer. How do the pro/anti-tumorigenic effects of heparanase differ across different cancer types? Does...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Giuseppe Ristagno1*, Francesca Fumagalli1, Barbara Bottazzi2, Alberto Mantovani2,3,4, Davide Olivari1, Deborah Novelli1 and Roberto Latini1 1Department of Cardiovascular Research, Mario Negri Institute for Pharmacological Research IRCCS, Milan, Italy 2Humanitas Clinical and Research Center-IRCCS, Milan, Italy 3Humanitas University, Milan, Italy 4The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom The long pentraxin PTX3 is a member of the pentraxin family produced locally by stromal and myeloid cells in response to proinflammatory signals and microbial moieties. The p...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Conclusions and Perspectives In this review, we have discussed important milestones from the early description of “Serum-sickness” as being due to antibodies directed against Neu5Gc epitopes all the way to the present-day therapeutic implications of these antibodies in cancer therapy. Some of these milestones have been represented in a concise timeline (Figure 6). While the “Xenosialitis” hypothesis is well-supported in the human-like mouse models, it has yet to be conclusively proven in humans. It remains to be seen if “Xenosialitis” plays a role in other uniquely-human diseases. FI...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Siriluck Ponsuksili1, Nares Trakooljul1, Frieder Hadlich1, Karen Methling2, Michael Lalk2, Eduard Murani1 and Klaus Wimmers1,3* 1Leibniz Institute for Farm Animal Biology (FBN), Institute for Genome Biology, Functional Genome Analysis Research Unit, Dummerstorf, Germany 2Institute for Biochemistry – Metabolomics, University of Greifswald, Greifswald, Germany 3Faculty of Agricultural and Environmental Sciences, University of Rostock, Rostock, Germany Given the central metabolic role of the liver, hepatic metabolites and transcripts reflect the organismal physiological state. Biochemical-clinical plasma bio...
Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
Tereza DÄ›dová1,2, Elena Iona Braicu3, Jalid Sehouli3 and Véronique Blanchard1* 1Institute of Laboratory Medicine, Clinical Chemistry and Pathobiochemistry, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany 2Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany 3Department of Gynecology, European Competence Center for Ovarian Cancer, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Be...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Guangwen Luo1†, Bailiang Li1†, Cailu Yang2†, Yutang Wang1, Xin Bian1, Wan Li1, Fei Liu1 and Guicheng Huo1* 1Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China 2Department of Ultrasound, Maternal and Child Health Hospital of Dapeng New District, Shenzhen, China Modulating gut microbiota to promote host health is well recognized. Therefore, people consume dietary products containing traditional probiotics in wishing to improve their health, and they need more research-based advices on how to select products with sui...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Authors: Yoshiji S, Takahashi K, Sawada K, Mishima M, Eso Y, Morita M, Takai A, Marusawa H, Ueda Y, Mimori T, Seno H Abstract Abatacept, a cytotoxic T lymphocyte antigen-4 immunoglobulin recombinant fusion protein, is an immunosuppressive agent indicated for rheumatoid arthritis. Although no significant increase in malignancy has been reported in abatacept-treated patients, whether or not abatacept accelerates tumor progression in specific cancer types remains unclear. We herein report a 66-year-old woman who showed unusually rapid progression of hepatocellular carcinoma following abatacept therapy for rheumatoid a...
Source: Internal Medicine - Category: Internal Medicine Tags: Intern Med Source Type: research
In conclusion, other parts of the human A3AR, either cytosolic or exposed upon receptor activation, rather than the C-terminus alone, are responsible for βarr2 recruitment in a complementary or synergistic way. PMID: 29309765 [PubMed - as supplied by publisher]
Source: Biochemical Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Biochem Pharmacol Source Type: research
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