JP6227601B2 - 好中球活性化に起因する疾患の治療薬及び検査方法 - Google Patents
好中球活性化に起因する疾患の治療薬及び検査方法 Download PDFInfo
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Description
1.ヒスチジンリッチ糖タンパク質を有効成分として含有する好中球活性化調節剤。
2.好中球活性化調節が、好中球活性化阻害である前項1に記載の好中球活性化調節剤。
3.前項1又は2に記載の好中球活性化調節剤を含む、好中球‐血管内皮細胞相互作用抑制剤。
4.前項1又は2に記載の好中球活性化調節剤を含む、好中球活性化に起因する疾患及び/又は好中球活性化を伴う炎症性疾患の治療薬。
5.好中球活性化に起因する疾患及び/又は好中球活性化を伴う炎症性疾患が、敗血症、急性呼吸窮迫症候群、急性膵炎、急性肺障害、出血性ショックによる肺障害、多臓器不全、火傷、多発外傷、特発性間質性肺線維症、脳外傷、脊髄損傷、神経因性疼痛、脳梗塞、クモ膜下出血後の脳血管攣縮、てんかん症、けいれん重積病、ウイルス脳炎、インフルエンザ脳症、炎症性腸疾患、川崎病、多発性硬化症、糖尿病性血管合併症、肝炎、動脈硬化症、気管支喘息、慢性気管支炎、肺気腫、外科手術後臓器障害、放射線治療後臓器障害、腎炎、ネフローゼ症候群、急性腎障害、血液透析、体外循環、人工呼吸、臓器移植後急性・慢性拒絶反応、SLE、関節リウマチ、DIC、自己免疫疾患群、ベーチェット病、心筋炎、心内膜炎、虚血再灌流障害、心筋梗塞、うっ血性心不全、脂肪組織炎症、好中球性皮膚症、スウィート病、スティーブン・ジョンソン症候群、ライ症候群、悪液質、慢性疲労症候群、線維筋痛症から選択される一種又は複数種の疾患である、前項4に記載の治療薬。
6.好中球活性化に起因する疾患及び/又は好中球活性化を伴う炎症性疾患が、敗血症、急性呼吸窮迫症候群、急性膵炎、急性肺障害から選択される疾患である、前項4又は5に記載の治療薬。
7.血中ヒスチジンリッチ糖タンパク質量を測定することを特徴とする、好中球活性化に起因する疾患及び/又は好中球活性化を伴う炎症性疾患の検査方法。
8.血中ヒスチジンリッチ糖タンパク質量の測定が、免疫学的手法により測定することによる、前項7に記載の検査方法。
9.好中球活性化に起因する疾患及び/又は好中球活性化を伴う炎症性疾患が、好中球活性化に起因する疾患及び/又は好中球活性化を伴う炎症性疾患が、敗血症、急性呼吸窮迫症候群、急性膵炎、急性肺障害、出血性ショックによる肺障害、多臓器不全、火傷、多発外傷、特発性間質性肺線維症、脳外傷、脊髄損傷、神経因性疼痛、脳梗塞、クモ膜下出血後の脳血管攣縮、てんかん症、けいれん重積病、ウイルス脳炎、インフルエンザ脳症、炎症性腸疾患、川崎病、多発性硬化症、糖尿病性血管合併症、肝炎、動脈硬化症、気管支喘息、慢性気管支炎、肺気腫、外科手術後臓器障害、放射線治療後臓器障害、腎炎、ネフローゼ症候群、急性腎障害、血液透析、体外循環、人工呼吸、臓器移植後急性・慢性拒絶反応、SLE、関節リウマチ、DIC、自己免疫疾患群、ベーチェット病、心筋炎、心内膜炎、虚血再灌流障害、心筋梗塞、うっ血性心不全、脂肪組織炎症、好中球性皮膚症、スウィート病、スティーブン・ジョンソン症候群、ライ症候群、悪液質、慢性疲労症候群、線維筋痛症から選択される一種又は複数種の疾患である、前項7に記載の検査方法。
VSPTDCSAVEPEAEKALDLINKRRRDGYLFQLLRIADAHLDRVENTTVYYLVLDVQESDCSVLSRKYWNDCEPPDSRRPSEIVIGQCKVIATRHSHESQDLRVIDFNCTTSSVSSALANTKDSPVLIDFFEDTERYRKQANKALEKYKEENDDFASFRVDRIERVARVRGGEGTGYFVDFSVRNCPRHHFPRHPNVFGFCRADLFYDVEALDLESPKNLVINCEVFDPQEHENINGVPPHLGHPFHWGGHERSSTTKPPFKPHGSRDHHHPHKPHEHGPPPPPDERDHSHGPPLPQGPPPLLPMSCSSCQHATFGTNGAQRHSHNNNSSDLHPHKHHSHEQHPHGHHPHAHHPHEHDTHRQHPHGHHPHGHHPHGHHPHGHHPHGHHPHCHDFQDYGPCDPPPHNQGHCCHGHGPPPGHLRRRGPGKGPRPFHCRQIGSVYRLPPLRKGEVLPLPEANFPSFPLPHHKHPLKPDNQPFPQSVSESCPGKFKSGFPQVSMFFTHTFPK
本実施例では、HRGを有効成分とする好中球活性化調節剤の調製について説明する。
本実施例では、ヒト血漿(240ml)を出発原料とし、Ni-NTA(nickel-nitrilotriacetic acid)アフィニティクロマトグラフィ及び高性能液体クロマトグラフィ(陰イオン交換カラム(単分散系親水性ポリマービーズ:Mono Q))により、HRGを精製した。ヒト血漿からの精製パターンを、図1及び図2に示した。これにより、分子量約80kDa画分に得られたHRG精製試料が得られた。精製試料はリン酸緩衝液(Phosphate Buffered Saline:1×PBS(-))で透析し、HRGを500〜1000μg/ml(5ml)含む調製物を本発明の好中球活性化調節剤とし、保存した。実験にはHRGの濃度をハンクス緩衝液(Hanks' Balanced Salt Solutions:HBSS)を用いて調整して使用した。
実施例1で調製した好中球活性化調節剤(HRG:1μM)による水平状態での好中球の走化性を確認した。本実験例では、ヒト末梢血から調製した好中球を5×106 cell/ml含むHBSSを好中球浮遊液とした。陰性コントロールとして、ウシ血清アルブミン(BSA)を1μM含むHBSSを用い、陽性コントロールとしてfMLP(細菌由来の遊走因子:N-formyl-methionyl-leucyl-phenylalanine)を1μM含むHBSSを用いた。
図5に示すフローチャートに従い実施例1で調製した好中球活性化調節剤(HRG:2μM、最終濃度1μM)50μlを実験例1と同手法により調製した好中球浮遊液(5×105 cell/ml)50μlに加えた系での好中球の形態を電子顕微鏡で観察した。実験例1と同様に、陰性コントロールとしてBSAを、陽性コントロールとしてfMLPを用いた。その結果、図6に示すように、陽性コントロール(fMLP)では多様な形態変化を起こし、接着形態を示したのに対し、好中球活性化調節剤(HRG)を加えた系では、陰性コントロール(BSA)よりも正球状形態を示すことが観察された。陰性コントロールの場合でも細胞表面に多数の微絨毛突起が出現しているのは、細胞処理による刺激によって生じたものと思われるが、好中球活性化調節剤を加えた系では、このような刺激がある場合でも、好中球の活性化を制御し、微絨毛突起の極めて少ない低活性状態を維持しうるものと考えられた。
本実験例では、実施例1で調製した好中球活性化調節剤(HRG:最終濃度1μM)による好中球浮遊液の通過性をMC-FAN(Micro Channel array Flow Analyzer)で測定した。実施例1で調製した好中球活性化調節剤を好中球浮遊液に加えた系で、37℃で60分インキュベートした後、MC-FANシリコンチップを用いて通過流動性を測定確認した。陰性コントロールとしてHBSS、BSA(Bovine serum albumin)及びHSA(Human serum albumin)を、陽性コントロールとしてfMLPを用いた。その結果、図9に示すように、好中球活性化調節剤の系では陰性コントロールと比較しても、スムーズな通過性を示した。
本実験例では、実施例1で調製した各濃度のHRGを含む好中球活性化調節剤を好中球浮遊液に加えて37℃で60分インキュベートした後の、マイクロプレートにおける好中球の接着能をイメージングサイトメーターを用いて測定した。その結果、図10に示すように、好中球活性化調節剤の系ではHRGの濃度依存的に細胞接着性を低下させることが確認された。
1.CLPモデルマウスでの血中HRG量の変化
本実験例では、盲腸結紮腹膜炎(cecal ligation and puncture: CLP)敗血症モデルでHRG動態を調べた。マウスの腹腔内より盲腸を取り出して、盲腸根部を縫合糸により結紮し、18ゲージ注射針を用いて盲腸壁層に穿刺してCLP敗血症モデルを作製した。単開腹(sham)マウスをコントロールとした。血中生体内のHRGレベルは、血漿をSDS-PAGE電気泳動後、ナイロン膜上に転写し、ウエスタンブロットにより検出し、測定した。
その結果、CLP敗血症モデル群のほうがsham群に比べて、HRGが有意に低下していることが観察された(図12)。
本実施例では、上記と同手法で作製したCLP敗血症モデルマウスに、実施例1で調製した好中球活性化調節剤を投与したときのマウスの生存率に及ぼす効果を確認した。術後5分、24時間及び48時間目に、調製した好中球活性化調節剤(HRG:400μg/マウス)を尾静脈内投与した(n=10)。HSAをコントロールとした(n=10)。
その結果、カプランマイヤー法で解析した結果、好中球活性化調節剤投与群のほうが、有意に高い累積生存率が確認された(図13)。
本実施例では、抗体サンドイッチELISA (Enzyme-Linked ImmunoSorbent Assay)法による血中HRGの測定方法について説明する。
常法によりヒトHRGにて免疫処理したウサギの免疫血清をProtein Aを用いて精製し、抗ヒトHRGウサギポリクローナル抗体を得た。ウサギ免疫処理に使用したHRGは、実施例1に記載と同手法により調製したものを使用した。0.05M Na2CO3(pH9.6)で調整した抗体溶液10μg/ml(100μl)をELISA用プレートに加え、4℃、16時間固相化した。その後3%BSAでブロッキング処理を行った。
本実施例では、実施例1と同手法により作製した自家製のヒトHRGタンパク標準液(ネイティブヒトHRGタンパク標準液)を試料として確認した。トリス緩衝生理食塩水(Tris-Buffered Saline:TBS)を用いて200-500倍に希釈した各濃度のネイティブヒトHRGタンパク標準液を100μl加え、37℃、2時間インキュベートした。ELISA用プレートをTBSで洗浄後、HRP標識の抗HRGラット単クローン抗体(クローン#75-14)(0.25μg/ml)を100μlを加え、37℃、1.5時間インキュベートした。ELISA用プレートをTBSで洗浄後、オルトフタレンヂアミンとH2O2を基質として加え、30分発色反応を行なった後、3M H2S04 50μlで反応を停止させて波長492nmでの吸光度を測定した。
本実施例では、抗体とNiNTA-HRPプローブサンドイッチELISA法による血中HRGの測定方法について説明する。
本方法では、ラット単クローン抗体(クローン#75-14)を抗原キャプチャー用抗体として用いた。0.05M Na2CO3(pH9.6)で調整した単クローン抗体溶液10μg/ml(100μl)をELISA用プレートに加え、固相化した。その後3%BSAでブロッキング後、実施例3と同様にTBSを用いて200-500倍に希釈した各濃度のネイティブヒトHRGタンパク標準液100μl加え、37℃、2時間インキュベートした。プレートを洗浄後、NiNTA-HRPプローブ(QUIAGEN Cat no. 34530, Tokyo, Japan )(0.25μg/ml)を100μl添加し、37℃、1.5時間インキュベートした。プレートを洗浄後、オルトフタレンヂアミンとH2O2を基質として加え、30分発色反応を行なった後、3M H2S04 50μlで反応を停止させ波長492nmでの吸光度を測定した。
本実施例では、ウエスタンブロット法による血中HRGの測定方法について説明する。血中HRGは、EDTA入り試験管に採血したヒト血液を加え、遠心分離により得た血漿にプロテアーゼ阻害剤カクテル(Sigma, P8340)を添加した後、電気泳動用試料として測定した。前記調製した血漿を、常法に従いSDS-PAGEを行い、ニトロセルロース膜に転写した。3%スキムミルクでニトロセルロース膜をブロッキング処理後、一次抗体として実施例3と同同手法で調製した抗ヒトHRGウサギポリクローナル抗体(2μg/ml)で4℃、16時間反応させた。ニトロセルロース膜を洗浄後、二次抗体としてHRP標識抗ウサギIgGヤギIgGを1μg/ml添加し、37℃、1時間インキュベートした。ニトロセルロース膜を洗浄後、Super Signal(R) West Dura Extended Duration Substrate (Thermo Scientific) を基質として発光反応を行ない、ルミノ・イメージアナライザー(Image Quant Las 4000 mini、GEヘルスケア) で検出した。
ヒト敗血症患者(3人)、食道癌手術後患者(4人)ならびに健常人(4人)より得た血漿について、実施例4に示すELISA法及び実施例5に示すウエスタンブロット法により血中HRGを測定した。各血漿は、実施例5に記載の方法に従って調製した。
本実施例では、セルレインによる急性膵炎及び引き続き起こるARDS(急性呼吸窮迫症候群: acute respiratory distress syndrome)のモデルマウスにおける血中HRG経時変化を確認した。マウス(体重 25-30g)にセルレイン100μg/回を1時間間隔で7回静脈注射し、急性膵炎及びARDSを惹起させ、モデルマウスを作製した。セルレイン投与後に経時的に採血し、実施例5の手法で作製した血漿についてHRGをウエスタンブロット法で測定した。
本実施例では、実施例2に記載と同手法によりCLPで作製したモデルマウスについて、術後24時間で、実施例1で調製した好中球活性化調節剤(HRG)を投与したときの各ARDS病態の評価を行った。
本実施例では、遺伝子組換えの手法により作製した組換え体ヒトHRGを有効成分とする好中球活性化調節剤で処理した場合の好中球の形態に及ぼす効果について説明する。
組換えヒトHRGは、以下のように作製した。ヒトHRGコーディング領域をコードするDNA(GenBank Accession No.NM000412で特定される塩基配列からなるDNA)を、CMVプロモーターを持つプラスミドベクターにライゲーションし、組換え体ヒトHRG作製用ベクターを調製した。HEK293細胞(ヒト胎児腎細胞由来、アデノウイルス5型による形質転換株)を3.5×106cells/10cm 径の細胞培養用ディシュに播種し培養した。培養したHEK293細胞をスクレーパーではがし、浮遊化させたのち、上記組換えヒトHRG作製用ベクターを25μg/OPTI-MEM 500μl+FuGENE-HD 50μl/OPTI-MEM 500μl 混合したものを添加し、室温で15分間反応させることでトランスフェクションを行なった。その後、HEK293細胞を37℃で5%CO2下、48時間培養し、組換えヒトHRGを作製した。
上記組換えヒトHRG精製品をHBSS置換してタンパク濃度を調整し、上記実験例1−2に記載と同手法により、各濃度の組換えヒトHRGを作用させたときのヒト好中球正球化活性のアッセイを行なった。比較のため、実施例1で作製したヒト血漿由来HRGについても確認した。その結果を、図19に示した。ヒト血漿由来HRGに比べて組換えヒトHRGは活性が低いものの、HRG濃度依存的に細胞が球状を維持しうることが観察された。
Claims (2)
- ヒト被検者より採取した血液中のヒスチジンリッチ糖タンパク質量を定量することを特徴とする、好中球活性化を伴う炎症性疾患の診断の補助のための検査方法。
- 好中球活性化を伴う炎症性疾患が、敗血症及び外科手術後臓器障害から選択される一種又は複数種の疾患である、請求項1に記載の検査方法。
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WO2012074043A1 (ja) | 2010-12-03 | 2012-06-07 | 国立大学法人 岡山大学 | 外傷性神経障害治療剤 |
JP2012129232A (ja) | 2010-12-13 | 2012-07-05 | Hitachi Kokusai Electric Inc | 基板処理装置及び半導体装置の製造方法 |
US9696321B2 (en) * | 2012-06-06 | 2017-07-04 | National University Corporation Okayama University | Therapeutic agent, method of treatment and method for predicting the severity of systemic inflammatory response syndrome (SIRS), diseases caused or accompanied by neutrophil activation |
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