JP6404821B2 - インターロイキン10産生促進剤 - Google Patents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/164—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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Description
1.IL-10産生細胞を、SPA及びIgGで刺激することを特徴とする、IL-10産生細胞からのIL-10産生促進方法。
2.IL-10産生細胞が白血球である、前項1に記載のIL-10産生促進方法。
3.白血球が、単球、顆粒球、リンパ球及び樹状細胞から選択されるいずれか1種又は複数種の細胞である、前項1に記載のIL-10産生促進方法。
4.SPA及びIgGを含む、IL-10産生促進剤。
5.SPA:IgGの配合比が、重量比に換算して、1:1〜1:100である、前項4に記載のIL-10産生促進剤。
6.前項4又は5に記載のIL-10産生促進剤を有効成分とする、免疫抑制剤。
本実施例では、ヒト末梢血単球についてSPA及びIgGによるIL-10産生促進作用を確認した。ヒト末梢血単球は、ヘパリン添加採血管を用いて採取した末梢血液をフィコール・ハイパック比重遠心法にて、単核細胞層を回収し、さらにCD14マイクロビーズを用いて分離し、10%FCSを添加したPRMI-1640培地に浮遊させて得た。2×106個/mlのヒト末梢血単球にSPA(10μg/ml)及びIgG(100μg/ml)を添加し、37℃で24時間刺激した。IL-10の産生量は、ELISAキット(human IL-10 DuoSet、R&D社:http://www.rndsystems.com/Products/DY217B)を用いて測定した。
本実施例では、SPA及びIgGの配合比を各種変更してヒト末梢血単球に添加し、刺激した場合のIL-10産生促進作用を確認した。SPA及びIgGの配合比を変更した以外は、実施例1と同手法により確認した。
本比較例では、SPA以外の黄色ブドウ球菌成分とIgGを添加したときのIL-10産生促進効果を確認した。SPA以外の黄色ブドウ球菌成分として、SPAの他黄色ブドウ球菌腸管内毒素B(SEB)及びαトキシンについて確認した。各黄色ブドウ球菌成分の添加量は、10μg/ml
とした。黄色ブドウ球菌成分を含まない系はAg(-)とした。IgGの添加量は0μg/ml又は100μg/mlとした。被検者1及び被検者2から実施例1と同手法によりヒト末梢血単球を採取し、各刺激でのIL-10の産生量を実施例1と同手法によりELISAキットを用いて測定した。
ヒト末梢血単核細胞を結核菌抗原(PPD)で刺激すると、炎症性サイトカインの一種であるIFN-γの産生が認められる。そこで本実験例では、SPA(10μg/ml)及びIgG(100μg/ml)を含む配合剤(SPA/IgG配合剤)をヒト末梢血単核細胞に添加した場合のIFN-γ産生に及ぼす影響を確認した。ヒト末梢血単核細胞は、ヘパリン添加採血管を用いて採取した末梢血液をフィコール・ハイパック比重遠心法にて、単核細胞層を回収して得た。
ヒト末梢血単核細胞をスギ花粉アレルゲンCry j1で刺激すると、アレルギー性サイトカインの一種であるIL-5の産生が認められる。そこで本実験例では、SPA/IgG配合剤をヒト末梢血単核細胞に添加した場合のIL-5産生に及ぼす影響を確認した。
本実験例では、SPA/IgG配合剤をヒト末梢血単球に添加した場合のIL-12産生に及ぼす影響を確認した。IL-12は、未分化なT細胞(ナイーブT細胞)に、IFN-γとともに作用し、ヘルパーT細胞へと分化誘導する炎症性サイトカインのひとつといわれている。実施例1と同手法で採取した2×106個/mlのヒト末梢血単球にSPA/IgG配合剤を添加し、37℃で24時間刺激した。SPA又はIgGのいずれかを添加する系、及びSPA及びIgGのいずれも添加しない系と比較した。IL-12の産生量は、ELISAキット(BD OptEIA ELISAセット、BD社:http://www.bdj.co.jp/pdf/66-006-05.pdf)を用いて測定した。
本実験例では、SPA(10μg/ml)及びIgG(100μg/ml)を配合した場合の、タンパク質の分子量の変化を、ポリアクリミルアミドゲル電気泳動により確認した。配合後1分、30分、1時間及び4時間の場合の分子量を確認した。
その結果を図7に示した。配合後の時間の経過とともに分子量の増加が認められ、SPAとIgGが複合体を形成していることが確認された。このことから、SPAとIgGが複合体を形成し、IL-10産生促進効果を発揮しているものと考えられた。
本実施例では、SPAの濃度を10μg/mlに固定し、IgGの濃度を25、50、100、200、400及び800μg/mlの各濃度に変更して配合したものを2×106個/mlのヒト末梢血単球に添加して刺激した場合のIL-10産生能を、無刺激でのIL-10の産生量を100とした場合のIL-10の相対的産生量(%)により確認した(n=3)。SPA及びIgGの配合比を変更した以外は、実施例2と同手法により確認した。
Claims (9)
- IL−10産生細胞を、培養容器内で黄色ブドウ球菌プロテインA(SPA)及び免疫グロブリンG(IgG)で刺激することを特徴とする、培養容器内でのIL−10産生細胞からのIL−10産生促進方法。
- IL−10産生細胞が白血球である、請求項1に記載のIL−10産生促進方法。
- 白血球が、単球、顆粒球、リンパ球及び樹状細胞から選択されるいずれか1種又は複数種の細胞である、請求項2に記載のIL−10産生促進方法。
- 白血球が、ヒト末梢血単球である、請求項2に記載のIL−10産生促進方法。
- SPA及びIgG(グルタルアルデヒド処理されたIgGではない)を含む、IL−10産生促進剤。
- SPA:IgG(グルタルアルデヒド処理されたIgGではない)の配合比が、重量比に換算して、1:1〜1:100である、請求項5に記載のIL−10産生促進剤。
- 請求項5又は6に記載のIL−10産生促進剤を有効成分とする、免疫抑制剤。
- 請求項5又は6に記載のIL−10産生促進剤を有効成分とする、IFN−γ産生抑制剤。
- 請求項5又は6に記載のIL−10産生促進剤を有効成分とする、IL−5産生抑制剤。
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