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Wang Y, Yamamoto Y, Shigemori S, Watanabe T, Oshiro K, Wang X, Wang P, Sato T, Yonekura S, Tanaka S, Kitazawa H, Shimosato T. Inhibitory/suppressive oligodeoxynucleotide nanocapsules as simple oral delivery devices for preventing atopic dermatitis in mice. Mol Ther 2014; 23:297-309. [PMID: 25502904 DOI: 10.1038/mt.2014.239] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 12/05/2014] [Indexed: 12/19/2022] Open
Abstract
Here, we report a simple and low-cost oral oligodeoxynucleotide (ODN) delivery system targeted to the gut Peyer's patches (PPs). This system requires only Dulbecco's modified eagle's medium, calcium chloride, ODNs, and basic laboratory equipment. ODN nanocapsules (ODNcaps) were directly delivered to the PPs through oral administration and were taken up by macrophages in the PPs, where they induced an immune response. Long-term continuous oral dosing with inhibitory/suppressive ODNcaps (iODNcaps, "iSG3caps" in this study) was evaluated using an atopic dermatitis mouse model to visually monitor disease course. Administration of iSG3caps improved skin lesions and decreased epidermal thickness. Underlying this effect is the ability of iSG3 to bind to and prevent phosphorylation of signal transducer and activator of transcription 6, thereby blocking the interleukin-4 signaling cascade mediated by binding of allergens to type 2 helper T cells. The results of our iSG3cap oral delivery experiments suggest that iSG3 may be useful for treating allergic diseases.
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Affiliation(s)
- Yeqin Wang
- Interdisciplinary Graduate School of Science and Technology, Shinshu University, Kamiina, Japan
| | | | - Suguru Shigemori
- 1] Interdisciplinary Graduate School of Science and Technology, Shinshu University, Kamiina, Japan [2] Research Fellow of the Japan Society for the Promotion of Science (JSPS), Chiyoda-ku, Japan
| | | | - Kazushi Oshiro
- Graduate School of Agriculture, Shinshu University, Kamiina, Japan
| | - Xinyu Wang
- Graduate School of Agriculture, Shinshu University, Kamiina, Japan
| | - Pengfei Wang
- Graduate School of Agriculture, Shinshu University, Kamiina, Japan
| | - Takashi Sato
- Department of Internal Medicine and Clinical Immunology, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - Shinichi Yonekura
- Department of Interdisciplinary Genome Sciences and Cell Metabolism, Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Kamiina, Japan
| | - Sachi Tanaka
- Frontier Agriscience and Technology Center (FAST), Shinshu University, Kamiina, Japan
| | - Haruki Kitazawa
- Food and Feed Immunology Group, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Takeshi Shimosato
- 1] Interdisciplinary Graduate School of Science and Technology, Shinshu University, Kamiina, Japan [2] Graduate School of Agriculture, Shinshu University, Kamiina, Japan [3] Department of Interdisciplinary Genome Sciences and Cell Metabolism, Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Kamiina, Japan
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Depigmented allergoids reveal new epitopes with capacity to induce IgG blocking antibodies. BIOMED RESEARCH INTERNATIONAL 2013; 2013:284615. [PMID: 24222901 PMCID: PMC3816019 DOI: 10.1155/2013/284615] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 08/01/2013] [Accepted: 08/12/2013] [Indexed: 02/03/2023]
Abstract
Background. The synthesis of allergen-specific blocking IgGs that interact with IgE after allergen immunotherapy (SIT) has been related to clinical efficacy. The objectives were to investigate the epitope specificity of IgG-antibodies induced by depigmented-polymerized (Dpg-Pol) allergoids and unmodified allergen extracts, and examine IgE-blocking activity of induced IgG-antibodies. Methods. Rabbits were immunized with native and Dpg-Pol extracts of birch pollen, and serum samples were obtained. Recognition of linear IgG-epitopes of Bet v 1 and Bet v 2 and the capacity of these IgG-antibodies to block binding of human-IgE was determined. Results. Serum from rabbits immunized with native extracts recognised 11 linear epitopes from Bet v 1, while that from Dpg-Pol-immunized animals recognised 8. For Bet v 2, 8 epitopes were recognized by IgG from native immunized animals, and 9 from Dpg-Pol immunized one. Dpg-Pol and native immunized serum did not always recognise the same epitopes, but specific-IgG from both could block human-IgE binding sites for native extract. Conclusions. Depigmented-polymerized birch extract stimulates the synthesis of specific IgG-antibodies which recognize common but also novel epitopes compared with native extracts. IgG-antibodies induced by Dpg-Pol effectively inhibit human-IgE binding to allergens which may be part of the mechanism of action of SIT.
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