JP2013501732A - ファーミキューテス門に属する細菌による感染症の治療及び免疫学的診断のための、PBP2aまたはそれに相同な配列を持つタンパク質に対するモノクローナル抗体 - Google Patents
ファーミキューテス門に属する細菌による感染症の治療及び免疫学的診断のための、PBP2aまたはそれに相同な配列を持つタンパク質に対するモノクローナル抗体 Download PDFInfo
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Landscapes
- Peptides Or Proteins (AREA)
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Abstract
【選択図】図1
Description
AR(結合率)=((log50−logA)×(B−A)/logB−logA)+A
ただし、log50=1.70とする。Aは、50%未満の吸光度減少が得られた、最も低いチオシアン酸アンモニウム濃度である。Bは、50%を超える吸光度減少が得られた、最も高いチオシアン酸アンモニウム濃度である。
グループ1:MAB(400μg)(1日目)
グループ2:バンコマイシン(150μg、筋肉内投与経路、12時間毎)
グループ3:バンコマイシン+MAB(350μg)(感染の1日後)
グループ4:対照
1.−分子量マーカー(カレイドスコープ);
2.−指数増殖期において成長させたMSSAサンプル;
3及び4.−指数増殖期において成長させたMRSAサンプル;
5.−静止期において(一晩)成長させたMSSAサンプル;
6及び7.−静止期において成長させたMRSAサンプル。左の矢印は、PBP2a分子量を示している。
1A:CEB MRSA(ブラジル流行クローン)+250μgの抗体;
2A:CEB MRSA+500μgの抗体;
3A:CEB MRSA+750μgの抗体;
4A及び6A:CEB MRSA株の陰性対照。
1B:COL MRSA+250μgの抗体;
2B:COL MRSA+500μgの抗体;
3B:COL MRSA+750μgの抗体;
4B及び6B:COL MRSA株の陰性対照。
1C:イベリア型MRSA(ヨーロッパ流行型クローン−EEC)+250μgの抗体;
2C:EEC MRSA+500μgの抗体;
3C:EEC MRSA+750μgの抗体;
4C及び6C:EEC MRSA株の陰性対照。
1D:CEB MRSA+150μgのバンコマイシン;
2D:CEB MRSA+300μgのバンコマイシン;
3D:CEB MRSA+500μgのバンコマイシン;
4D:CEB MRSA+750μgのバンコマイシン;
5D及び6D:陰性対照。
クローン10:1.03/1.46(処理/非処理のDOの読み)=70.5%
クローン38:1.00/1.21=82.6%
チオシアン酸アンモニウムプロトコル結合:
クローン10(DO):
対照:1.12
チオシアン酸塩で処理したサンプル:
2M=0.046;1.5M=0,047;1M=0.107;0.75M=0.483;0.5M=0.602;0.375M=0.684
結合率:2.47
クローン38(DO):
対照:1.22
チオシアン酸塩で処理したサンプル:
2M=0.056;1.5M=0.062;1M=0.129;0.75M=0.648;0.5M=0.758;0.375M=0.793
結合率:4.40
配列番号6−CDR1軽鎖アミノ酸。
RSSQSIGHSNGNTYLE
配列番号7−CDR2軽鎖アミノ酸。
KVSNRFS
配列番号8−CDR3軽鎖アミノ酸。
FQGSYVPLT
配列番号9−CDR1軽鎖DNA。
cgcagcagccagagcattggccatagcaacggcaacacctatctggaa
配列番号10−CDR2軽鎖DNA。
aaagtgagcaaccgctttagc
配列番号11−CDR3軽鎖DNA。
tttcagggcagctatgtgccgctgacc
配列番号12−CDR1重鎖アミノ酸。
GFSITSSSSCWH
配列番号13−CDR2重鎖アミノ酸。
RICYEGSISYSPSLKS
配列番号14−CDR3重鎖アミノ酸。
ENHDWFFDV
配列番号15−CDR1重鎖DNA。
ggctttagcattaccagcagcagcagctgctggcat
配列番号16−CDR2重鎖DNA。
cgcatttgctatgaaggcagcattagctatagcccgagcctgaaaagc
配列番号17−CDR3重鎖DNA。
gaaaaccatgattggttttttgatgtg
サンプル:SelecSure MAB樹脂を用いたHPLCにより上清から精製し、透析し、凍結乾燥させた。
抗体定量化(ローリー法):3.5mg/mL
接種材料:VRE株
前接種材料:バンコマイシン(10mg/mL)を添加した20mLのLB培地にVRE1コロニーを接種、静止期(ON)に37℃で成長させ、160rpmで遠心分離
接種材料:20mLのLB培地に400mLの前接種材料、200mLの三角フラスコ、37℃、160rpm
7時間後のDO600nmの読み:0.7
定量化:5.5×108個の細菌/mL
試験条件:
接種材料:5.5×105個の細菌
抗体濃度:300、400、500、600及び700mgの抗体
培地:1mLのルリア培地
細胞培養プレート,24ウェル
陽性対照:ルリア培地+細菌接種材料
陰性対照:ルリア培地
培養:18時間、37℃
A.300mgの抗体
B.400mgの抗体
C.500mgの抗体
D.600mgの抗体
E.陰性対照
F.陽性対照
G.700mgの抗体
を有する。
メスの7週齢のBalb/C動物,平均体重20g
1日目−前接種材料:バンコマイシン(10mg/mL)を添加した10mLのLB培地にVRE株1コロニーを接種、50mLのファルコン(Falkow)チューブ、静止期(ON)に37℃で成長させ、160rpmで遠心分離
2日目−接種材料:50mLのLB培地/バンコマイシン(250mLの三角フラスコ)に1mLの前接種材料−4バイアル、37℃、160rpm、DO600nm=0.80まで成長させ、4,000rpmで10分間遠心分離し、1倍の無菌PBS中で再懸濁、OD1.2
定量化:2.1×108個の細菌/mL
A.60μL(1.5×107)
B.300μL(6.5×107)
C.900μL(300μL/用量まで減少)(1.5×108)
D.4.5mL(300μL/用量まで減少)(6.5×108)
E.9.0mL(1.2×109個の細菌)(300μL/用量まで減少)
F.45.0mL(6.5×109個の細菌)(300μL/用量まで減少)
A(1.5×107):細菌増殖なし
B(6.5×107):細菌増殖なし
C(1.5×108):3100個の細菌
D(6.5×108):2.8×104個の細菌
−サンプルを精製(HPLC SelecSure MAB)し、透析し、凍結乾燥させ、再懸濁し、使用前にろ過した。
−定量化(ローリー法):1.0mg/mL
2.マウスモデル:メスの8週齢のBalb/C動物,体重23〜25g
3.プロトコル:
A群(6匹の動物):650mgの抗体(350mg+300mg)
B群(6匹の動物):対照(生理食塩水投与)
4.細菌接種材料の調製:
VRE株:
前接種材料,1日目,バンコマイシン(10mg/mL)を添加した10mLのBHI培地、静止期(ON)、37℃、160rpm
接種材料,3日目:バンコマイシンを添加した30mLのBHI培地に300mLの前接種材料を接種、DO600は1.31、4,000rpmで10分間遠心分離し、0.5倍の無菌PBS中で再懸濁し、OD=1.10に調整し、希釈し、プレーティングして定量化(2.0×108個の細菌/mL);接種材料:12mL,遠心して300mL中で再懸濁,IP経路(〜2.2×109個の細菌)
タイムスケジュール:
1日目:抗体(350mg)のIP接種
2日目:抗体(300mg)のIP接種、午後に全身感染(IP,250mLの細菌溶液−2.2×109個の細菌)
2日目から13日目:動物の観察。
1.抗体(血清入り培地で培養した細胞培養液の上清から精製したもの)
−サンプルを精製し(AffiPrep Protein A Biorad/HPLC SelecSure MAB)、透析し、凍結乾燥し、再懸濁した。
−定量化(ローリー法):1.5mg/mL
2.マウスモデル:メスの8週齢のBalb/C動物,体重19〜23g
3.プロトコル:
A群(4匹の動物):500μgの抗体(2ヶ月間,d01,d02)
B群(4匹の動物):非感染防御対照
4.細菌接種材料の調製:
イベリア型MRSA株:
前接種材料,10mLのLB培地、静止期(ON)、37℃、120rpm
接種材料:20mLのLB培地に200μLの前接種材料、DO600は0.80、4,000rpmで10分間遠心分離し、0.5倍の無菌PBS中で再懸濁し、OD=0.51に調整し、希釈し、プレーティングして定量化(2.4×108個の細菌/mL);接種材料:500μL,IP経路(2.4×108個の細菌)
タイムスケジュール:
1日目:腹腔内経路による250μgの抗体の接種
2日目:腹腔内経路による250μgの抗体の接種及び全身感染(腹腔内,500μLの細菌溶液)
6日目:安楽死、腎臓内の細菌の定量
合計700μgの抗体は、550,000個の細菌の成長を阻止することができる。これらの値は、MRSA株に対して得られたMIC(約500μgであった)よりも高い。
インビトロ防御能試験−マウスモデルにおける腹腔内経路による亜致死量のバンコマイシン耐性エンテロコッカス・フェシウム全身感染
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Claims (19)
- メチシリン耐性黄色ブドウ球菌(MRSA)から産生されたPBP2aタンパク質に対して結合する単離されたモノクローナル抗体であって、
配列番号6、7、8、12、13及び14からなる群から選択されたアミノ酸配列または該アミノ酸配列に対して少なくとも80%の相同性を有する対応するアミノ酸配列を含んでなる可変鎖領域を含むことを特徴とする単離されたモノクローナル抗体。 - メチシリン耐性黄色ブドウ球菌(MRSA)から産生されたPBP2aタンパク質に対して結合する単離されたモノクローナル抗体であって、
配列番号9、10、11、15、16及び17からなる群から選択されたアミノ酸配列または該アミノ酸配列に対して少なくとも80%の相同性を有する対応するアミノ酸配列を含んでなる可変鎖領域を含むことを特徴とする単離されたモノクローナル抗体。 - エンテロコッカス属種から産生されたPBP2aタンパク質に対して結合する単離されたモノクローナル抗体であって、
配列番号6、7、8、12、13及び14からなる群から選択されたアミノ酸配列または該アミノ酸配列に対して少なくとも80%の相同性を有する対応するアミノ酸配列を含んでなる可変鎖領域を含むことを特徴とする単離されたモノクローナル抗体。 - エンテロコッカス属種から産生されたPBP2aタンパク質に対して結合する単離されたモノクローナル抗体であって、
配列番号9、10、11、15、16及び17からなる群から選択されたアミノ酸配列または該アミノ酸配列に対して少なくとも80%の相同性を有する対応するアミノ酸配列を含んでなる可変鎖領域を含むことを特徴とする単離されたモノクローナル抗体。 - βラクタム系抗菌薬に対する耐性を診断するための方法であって、
PBP2aまたはそれに相同なタンパク質を含んでいる疑いのある細菌サンプルに対して、請求項1または2のいずれかに定義された単離されたモノクローナル抗体を単独でまたは他の物質と共に加えるステップを含むことを特徴とする方法。 - PBP2aまたはそれに相同なタンパク質を持っている細菌による感染症を治療または予防するための医薬組成物であって、
所定量の請求項1または2のいずれかに定義された単離されたモノクローナル抗体と、薬学的に許容されるビヒクル、担体または賦形剤とを含むことを特徴とする医薬組成物。 - PBP2aまたはそれに相同なタンパク質を含んでいる細菌による感染症を治療または予防するための方法であって、
所定量の請求項1または2のいずれかに定義された単離されたモノクローナル抗体を、ヒトまたは動物の対象に対して投与するステップを含むことを特徴とする方法。 - 請求項1に記載の抗体であって、
配列GFSITSSSSCWH(配列番号12)または該配列に対応する変性の可能性のある核酸配列を含むCDR1領域を有する可変重鎖(CDR1 VH)を含むことを特徴とする抗体。 - 請求項1に記載の抗体であって、
配列RICYEGSISYSPSLKS(配列番号13)または該配列に対応する変性の可能性のある核酸配列を含むCDR2領域を有する可変重鎖(CDR2 VH)を含むことを特徴とする抗体。 - 請求項1に記載の抗体であって、
配列ENHDWFFDV(配列番号14)または該配列に対応する変性の可能性のある核酸配列を含むCDR3領域を有する可変重鎖(CDR3 VH)を含むことを特徴とする抗体。 - 請求項1に記載の抗体であって、
配列RSSQSIGHSNGNTYLE(配列番号6)または該配列に対応する変性の可能性のある核酸配列を含むCDR1領域を有する可変軽鎖(CDR1 VL)を含むことを特徴とする抗体。 - 請求項1に記載の抗体であって、
配列KVSNRFS(配列番号7)または該配列に対応する変性の可能性のある核酸配列を含むCDR2領域を有する可変軽鎖(CDR2 VL)を含むことを特徴とする抗体。 - 請求項1に記載の抗体であって、
配列FQGSYVPLT(配列番号8)または該配列に対応する変性の可能性のある核酸配列を含むCDR3領域を有する可変軽鎖(CDR3 VL)を含むことを特徴とする抗体。 - 請求項2に記載の抗体であって、
配列番号9に記載の配列または該配列に対応する変性の可能性のある核酸配列を含むCDR1領域を有する可変軽鎖を含むことを特徴とする抗体。 - 請求項2に記載の抗体であって、
配列番号10に記載の配列または該配列に対応する変性の可能性のある核酸配列を含むCDR2領域を有する可変軽鎖を含むことを特徴とする抗体。 - 請求項2に記載の抗体であって、
配列番号11に記載の配列または該配列に対応する変性の可能性のある核酸配列を含むCDR3領域を有する可変軽鎖を含むことを特徴とする抗体。 - 請求項2に記載の抗体であって、
配列番号15に記載の配列または該配列に対応する変性の可能性のある核酸配列を含むCDR1領域を有する可変重鎖を含むことを特徴とする抗体。 - 請求項2に記載の抗体であって、
配列番号16に記載の配列または該配列に対応する変性の可能性のある核酸配列を含むCDR2領域を有する可変重鎖を含むことを特徴とする抗体。 - 請求項2に記載の抗体であって、
配列番号17に記載の配列または該配列に対応する変性の可能性のある核酸配列を含むCDR3領域を有する可変重鎖を含むことを特徴とする抗体。
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PCT/BR2010/000263 WO2011017791A1 (pt) | 2009-08-10 | 2010-08-10 | Anticorpos monoclonais para a proteína pbp2-a e sequências homólogas para o tratamento de infeçcões e imunodiagnóstico em bactérias do filo firmicutes |
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JPN6014045035; Chin J Cell Mol Immunol Vol.23, No.6, 2007, P.552-555 * |
JPN6014045037; Journal of Bacteriology Vol.172, No.12, 1990, P.6856-6862 * |
JPN6014045040; 'E-14. Development and Characterization of MASA-Specific Human Monoclonal Antibodies for Therapeutic' Abstructs of the General Meeting of the American Society for Microbiology 99th, 1999, P.274 * |
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