JP5806342B2 - ウイルス成分に結合させた蛍光染料を含む神経画像化用の画像化方法および組成物 - Google Patents
ウイルス成分に結合させた蛍光染料を含む神経画像化用の画像化方法および組成物 Download PDFInfo
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Description
本出願は、米国特許法第119条(e)項の下、その開示が参照により本明細書に組み込まれている、2008年5月14日に出願した米国特許仮出願第61/127,659号明細書および2008年7月23日に出願した米国特許仮出願第61/082,981号明細書に対する優先権の恩典を主張するものである。
蛍光染料と、
神経向性複製欠陥性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と
を含み、
蛍光染料がウイルス成分に結合して、神経細胞に入り込む能力を有する染料/ウイルス成分複合体を形成した
組成物を提供する。
蛍光染料と、
神経向性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と
を含み、
蛍光染料がウイルス成分に結合して、神経細胞に入り込む能力を有する染料/ウイルス成分複合体を形成した
ワクチンを提供する。
蛍光染料を、神経向性複製欠陥性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と混合すること、
蛍光染料をウイルス成分に結合させて、神経細胞に入り込む能力を有する染料/ウイルス成分複合体を形成すること
を含む方法を提供する。
(a)
蛍光染料と、
神経向性複製欠陥性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と
を含み、
蛍光染料がウイルス成分に結合して、染料/ウイルス成分複合体を形成した
組成物を対象に投与すること、
(b)染料/ウイルス成分複合体を神経細胞に入り込ませること、
(c)染料が蛍光を発するような十分な量の放射エネルギーを対象に当てること、
(d)手術中に対象の蛍光画像を得ること、および
(e)蛍光画像を観察して、対象の体内の1つまたは複数の神経を見ること
を含む方法を提供する。
(a)
蛍光染料と、
神経向性複製欠陥性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と
を含み、
蛍光染料がウイルス成分に結合して、染料/ウイルス成分複合体を形成した
組成物を対象に投与すること、
(b)染料/ウイルス成分複合体を神経細胞に入り込ませること、
(c)染料が蛍光を発するような十分な量の放射エネルギーを対象に当てること、
(d)手術中に対象の蛍光画像を得ること、および
(e)蛍光画像を観察して、神経が横切されているかどうかを判定すること
を含む方法を提供する。
本明細書で使用するとき、用語「蛍光染料」または「染料」は、適当な波長の放射光エネルギーによって励起されたときに可視または近赤外波長範囲の光を放出することで蛍光を発する小分子あるいはタンパク質または他の重合体もしくは高分子を意味する。
一実施形態では、ウイルス成分が、ウイルス、ウイルスタンパク質およびカプシドの中から選択される。一実施形態では、このウイルスタンパク質が、カプシドまたはカプシドタンパク質である。一実施形態では、このウイルスタンパク質が、ウイルスタンパク質類似体である。一実施形態では、このウイルスタンパク質およびウイルスタンパク質類似体が、ウイルスカプシドまたはウイルス全体の一部としてではなく、単独で神経細胞に入り込む能力を有する。他の実施形態では、このウイルスタンパク質および類似体を、それ自体が神経細胞に入り込むウイルスカプシドまたはウイルス全体の一部とすることができる。類似体は、タンパク質またはペプチドの1次配列は変化させるが、その機能は通常変化させないアミノ酸の保存的な(conservative)変更に帰着する異なる核酸構造を有する。保存的アミノ酸置換は一般に、以下のグループ内での置換を含む:
グリシン、アラニン;
バリン、イソロイシン、ロイシン;
アスパラギン酸、グルタミン酸;
アスパラギン、グルタミン;
セリン、トレオニン;
リシン、アルギニン;
フェニルアラニン、チロシン。
蛍光染料と、
神経向性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と
を含み、
蛍光染料がウイルス成分に結合して、神経細胞に入り込む能力を有する染料/ウイルス成分複合体を形成した
ワクチンを提供する。
前述のとおり、ある実施形態では、この組成物が、複製欠陥性ウイルス成分に結合した染料を含む。ある種の実施形態では、本明細書においてさらに説明するように、この組成物が、ウイルスタンパク質または不活化されたウイルスに結合した染料を含む。神経画像化のため、組成物を対象(subject)に投与することができる。
蛍光染料を、神経向性複製欠陥性ウイルス、神経向性ウイルスのウイルスタンパク質および神経向性ウイルスのカプシドの中から選択されたウイルス成分と混合すること、
蛍光染料をウイルス成分に結合させて、神経細胞に入り込む能力を有する染料/ウイルス成分複合体を形成すること
を含む方法を提供する。
一実施形態は、対象の少なくとも1つの神経を画像化する方法を提供する。この画像は手術中に得ることができる。したがって、手術を実行する領域またはその近くの領域を外科的に露出させることができる。この方法は、(a)本明細書に記載した組成物を投与して、染料/ウイルス成分複合体を形成すること、(b)染料/ウイルス成分複合体を神経細胞に入り込ませること、(c)染料が蛍光を発するような十分な量の放射エネルギーを前記領域に当てること、(d)手術中に蛍光画像を得ること、および(e)蛍光画像を観察して、蛍光画像内に少なくとも1つの神経が存在するのか、または存在しないのかを判定することを含む。
他の実施形態は、神経の状態、例えば、手術中などに、神経が損傷を受けたりまたは横切されたりしていないかかどうか、あるいは神経がうまく切除されたかどうかを診断する方法を提供する。一実施形態では、この診断方法が、(a)本明細書に開示した組成物を対象に投与するステップと、(b)染料/ウイルス成分複合体を神経細胞に入り込ませるステップと、(c)染料が蛍光を発するような十分な量の放射エネルギーを対象に当てるステップと、(d)手術中に対象の蛍光画像を得るステップと、(e)蛍光画像を観察して、対象の体内の1つまたは複数の神経を見、かつ/あるいは1つまたは複数の神経が横切されているかどうかを判定するステップとを含む。
組成物を投与した後、組成物中の蛍光染料を励起して蛍光を放出するようにし、その放出光をカメラによって捕捉する。適当な装置は、SPYシステム(Novadaq Technologies Inc.社、カナダMississauga)、または特許文献4に記載されている装置である。
本明細書では冠詞「a」および「an」が、その冠詞の文法上の対象が1つまたは2つ以上(すなわち少なくとも1つ)あることを示す。一例として、「an element」は、1つの要素または2つ以上の要素を意味する。「複数」は少なくとも2つを意味する。
(実施例1:ウイルス突然変異体の調製)
HSV−2 ΔRR突然変異体は、非特許文献8および非特許文献9に記載されているとおりに調整することができる。
以下の2種類の保存溶液を調製した。
(2)HSV−2 ΔRRウイルス保存溶液:リン酸緩衝食塩水(PBS)20μl中に107pfuを含む
実施例3は、蛍光染料だけを用いた画像化とウイルスに結合させた蛍光染料を用いた画像化との比較である。特に明記しない限り、全ての画像はCCDカメラによって得たディジタル画像である。
図3Aは、脊柱および背部の筋肉が露出した実施例3のマウスの背部の蛍光画像である。ICGだけを注射した左足の蛍光は、左足だけに限定されている。ICG/PBS/HSV−2 ΔRR混合物を注射した右足は、右足自体が蛍光を発しており、この蛍光は、足の神経の脊髄神経節(すなわちニューロン細胞体)が位置する脊柱まで延びている。ICG−PBS−HSV−2 ΔRR複合体は、右足から、軸索に沿って、脊柱にある軸索の細胞体まで移動した。ICG−PBS−HSV−2 ΔRRのフットパッド注射は、脊柱までずっとフットパッド神経をたどった。図3Bは、図3Aと同じ図を、蛍光画像化を使用していない可視(白色)光画像として示している。
実施例4は、蛍光が、脊柱の左側に接続する左足からの神経だけに限定されることを示すため、ウイルスに結合させた蛍光染料を注射したものと、注射しなかったものとを比較したものである。
図4Aは、マウス全体の腹側から見たICG/PBS/HSV−2 ΔRR蛍光画像を示す(マウスは仰向けに横たわっている)。左フットパッド注射の結果、左足全体に蛍光が見られ、蛍光は左脚内へ延びている。注射していない右フットパッド、右足および右脚は蛍光を発していない。
この実施例は、ウイルスを複製欠陥性にするUV照射によって不活化されたウイルスの画像化応用を示す。
Claims (1)
- 蛍光染料と、
神経細胞内では複製不可能な神経向性herpes varicellaeとを含み、
前記蛍光染料は前記ウイルスに結合して、神経細胞に入り込む能力を有する複合体を形成し、
前記染料はインドシアニングリーンである
ことを特徴とする組成物。
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EP2285417A1 (en) | 2011-02-23 |
RU2011111077A (ru) | 2012-09-27 |
RU2475537C2 (ru) | 2013-02-20 |
US20090285762A1 (en) | 2009-11-19 |
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US20120078093A1 (en) | 2012-03-29 |
US20160199515A1 (en) | 2016-07-14 |
BRPI0908612A2 (pt) | 2020-08-18 |
WO2009140510A1 (en) | 2009-11-19 |
KR20140007976A (ko) | 2014-01-20 |
KR101406506B1 (ko) | 2014-06-19 |
HK1212921A1 (zh) | 2016-06-24 |
CN104800863A (zh) | 2015-07-29 |
JP2014111614A (ja) | 2014-06-19 |
US8361775B2 (en) | 2013-01-29 |
US20180369426A1 (en) | 2018-12-27 |
JP2011520907A (ja) | 2011-07-21 |
EP3124051A1 (en) | 2017-02-01 |
CN102026668A (zh) | 2011-04-20 |
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