JP2016512221A - リンパ節検出のための低浸透圧溶液 - Google Patents
リンパ節検出のための低浸透圧溶液 Download PDFInfo
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Abstract
Description
本願は、2013年3月11日に出願した米国仮特許出願第61/775,780号に対して優先権を主張する。米国仮特許出願第61/775,780号の内容全体は、本明細書に参考として援用される。
本発明は、一般に、医療診断の分野、ならびに外科的切除のために組織を位置決定するための診断法およびデバイスに関する。
約125万の新たな乳癌症例が毎年診断されている。これら症例のうちの大部分において、腫瘍を除去する手術、およびセンチネルリンパ節を切除およびこれらを組織学的に検査して、上記癌が身体の他の部位に既に拡がっているか否かを決定することは、切迫して必要である。上記センチネルリンパ節は、上記腫瘍からのリンパ液排出を受ける最初のリンパ節である。センチネルリンパ節がこのようによばれているのは、拡がった任意の癌を臨床医に信頼性高く注意喚起することが理由である。センチネルリンパ節生検は、現在、乳癌手術におけるケアの標準である。
本発明は、この必要性に対処する。
本発明は、一部、患者においてリンパ節を迅速に検出するために有用な組成物の知見に関する。これら組成物は、低浸透圧溶液中の磁性粒子の懸濁物を含む。上記低浸透圧溶液の重量オスモル濃度は、注射後のリンパ系を通じた上記磁性粒子の迅速な排出もしくは輸送を容易にし、それによって、最初の注射とリンパ節検出との間の中断時間を短縮する。注射部位に隣接するリンパ節は、最初の注射のほんの5〜15分後に強く検出され得、それは、現在の方法より少なくとも50%素早く、それによって、より効率的な術前検査を可能にする。さらに、本発明の低浸透圧溶液は、多用途溶媒であり、等張性もしくは高張性の溶液よりも広い範囲の賦形剤とともに使用され得る。さらに、リンパ節への迅速な移動は、注射部位での残余の痕跡(すなわち、針痕(tattooing))を軽減し得る。
・共溶媒(例えば、エタノール、プロピレングリコール、ポリプロピレングリコール、PEG400、グリセロール、ベンジルアルコール、およびこれらの組み合わせ);
・油(例えば、脂質、流動パラフィン、胡麻油、PEG植物性油、およびこれらの組み合わせ);界面活性剤(例えば、ポリオキシエチレン脂肪酸エステル、ポリオキシル40ヒマシ油、ポリソルベート20、ポリソルベート80、およびこれらの組み合わせ);
・リポソーム(例えば、レシチン、卵レシチン、ホスファチジルグリセロール、リン脂質、卵リン脂質、およびこれらの組み合わせ);
・炭水化物(例えば、デキストロース);
・アミノ酸もしくはアミノ酸混合物(例えば、Aminosyn(登録商標)II、Travasol(登録商標)、およびHepatAmine(登録商標));
・増粘剤/安定化剤(例えば、カルボキシメチルセルロース);ならびに
・注射に適した緩衝剤。
賦形剤が溶液の重量オスモル濃度を増大させる場合、無機塩および/もしくはグリコールの量は、上記低浸透圧溶液の合計重量オスモル濃度が約80mOsm〜約160mOsmの間であるように調節され得る。
2mlのSienna+(登録商標)(Endomagnetics;Cambridge, U.K.)を使用するヒト患者での治験は、腋窩リンパ節におけるゆっくりとした取り込みとともに、30分後に不十分な外部シグナルを与えることを示した。Sienna+(登録商標)は、非常に低浸透圧性であり、重量オスモル濃度は、約30mOsm/kgである。Sienna+(登録商標)を間質組織へと注射した場合、周りの細胞は上記注射から水を迅速に吸収して、浸透圧を維持すると推測された。これは、Sienna+(登録商標)のより濃縮した塊を残すと同時に、間質圧を低下させ、リンパ系への輸送を効果的に低下させる。体積の増大は間質圧を増大させ、それによって、リンパ系による取り込み速度を増大させると考えられる。しかし、体積の大きな増大は、上記患者にとって不快であると判明し得る。さらに、センチネルリンパ節生検(例えば、腸、黒色腫、いくつかの頭頸部がん)のためのいくつかの潜在的適用は、注射体積の増大を許容しない。重量オスモル濃度が増大した溶液は、より迅速な応答を提供すると仮定した。なぜなら間質液の流体の体積および圧力は、維持される(等張)か、またはさらには増大され(高張性注射に関しては、そこで周りの細胞が水を排出する)、従って、リンパ節への流れを増大させるからである。
ブタ乳房を、インビボリンパ節モデルとして使用した。上記溶液を鼠径第3乳頭(3rd inguinal papillar)へ直接注射した後、ブタにおける超常磁性酸化鉄粒子の生体分布に対するカルボキシデキストラン被覆磁赤鉄鉱ナノ粒子溶液の濃度および体積の効果を評価するために調査を行った。上記磁赤鉄鉱コアは、直径約5nmを有し、上記カルボキシデキストラン被覆は、粒子直径を約60〜70nmへと増大させた。この研究の目的は、0.3% w/v、0.6% w/v、および0.9% w/vの塩化ナトリウムで調製した磁赤鉄鉱ナノ粒子溶液の注射後に、ブタリンパ節における超常磁性酸化鉄粒子の生体分布を評価することであった。上記粒子のリンパ節生体分布に対する張度の影響を、SentiMag(登録商標)磁性プローブの使用によって評価した。
0.3% w/v 食塩水(saline solution)中のSienna+(登録商標)(図1、システムa)は、0.6%食塩水および0.9%食塩水の両方と同程度に効果的であると見出された(図1、それぞれ、システムbおよびc)。これは、驚くべきことであった。なぜなら0.3% w/v 溶液は、0.6% w/v(270sOsm、ほぼ等張性)および0.9% w/v(384mOsm、高張性)と比較して、低張性(156mOsm)であるからである。0.3% w/v 溶液に関するこのような強い結果は、予測外である。上記低張度は、0.6%溶液および0.9%溶液と比較して、使用され得る製剤添加剤(賦形剤)の範囲を拡げると考えられる。
代替の溶質を含む低浸透圧溶液を調査するために、類似のインビボでのブタ研究に着手した。全ての注射を、鼠径第3乳頭の基部に直接行った。各ブタには、左乳頭および右乳頭に異なる注射を与えた。各試験溶液を、異なるブタ(n=3)の3個の乳頭へと注射した。表3は、試験した製剤を示す。表3において、「システム」の列は、図2の曲線に相当する。
Claims (28)
- 医療用注射のための低浸透圧懸濁物であって、
約13mg/mL〜約200mg/mLの磁性粒子;および
約0.01% w/v〜約0.6% w/vの無機塩もしくは約0.5% w/v〜約1.5% w/vのグリコールのいずれかから選択される浸透圧調節物質、
を含む、低浸透圧懸濁物。 - 前記磁性粒子は、酸化鉄である、請求項1に記載の低浸透圧懸濁物。
- 前記酸化鉄の粒子は、超常磁性である、請求項2に記載の低浸透圧懸濁物。
- 約13mg/mLの磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 約26mg/mLの磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 約52mg/mLの磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 前記低浸透圧懸濁物は、約80mOsm/kg〜約160mOsm/kgの重量オスモル濃度を有する、請求項1に記載の低浸透圧懸濁物。
- 賦形剤をさらに含む、請求項1に記載の低浸透圧懸濁物。
- 前記磁性粒子は被覆されている、請求項1に記載の低浸透圧懸濁物。
- 前記被覆はデキストランを含む、請求項9に記載の低浸透圧懸濁物。
- 前記無機塩は、塩化ナトリウムである、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、センチネルリンパ節の検出のために使用され、約0.05%〜約0.3% w/vの前記無機塩を含む。請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、センチネルリンパ節の検出のために使用され、約0.1%〜0.3 w/vの前記無機塩を含む、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、センチネルリンパ節の検出のために使用され、約0.6% w/v未満のもしくは約0.6% w/vに等しい前記無機塩を含む、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、センチネルリンパ節の検出のために使用され、約0.3% w/v未満のもしくは約0.3% w/vに等しい前記無機塩を含む、請求項1に記載の低浸透圧懸濁物。
- 前記グリコールは、プロピレングリコールである、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、磁性温熱療法処置のために使用され、約20mg/ml〜200mg/mlの前記磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、磁性温熱療法処置のために使用され、約58mg/ml〜140mg/mlの前記磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、磁性温熱療法処置のために使用され、約56mg/ml〜140mg/mlの前記磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 前記懸濁物は、磁性温熱療法処置のために使用され、約100mg/ml〜140mg/mlの前記磁性粒子を含む、請求項1に記載の低浸透圧懸濁物。
- 患者においてリンパ節を位置決定する方法であって、該方法は、
請求項1に記載の低浸透圧懸濁物を提供する工程;
該低浸透圧懸濁物を該患者に注射する工程;
該磁性粒子がリンパ節に捕捉されるまで待つ工程;および
該磁性粒子の位置を検出することによって、該リンパ節の位置を検出する工程、
を包含する、方法。 - 0.2mLの低浸透圧懸濁物を注射する工程を包含する、請求項21に記載の方法。
- 0.4mLの低浸透圧懸濁物を注射する工程を包含する、請求項21に記載の方法。
- 0.8mLの低浸透圧懸濁物を注射する工程を包含する、請求項21に記載の方法。
- 検出する工程は、磁力計を使用して行われる、請求項21に記載の方法。
- 患者においてリンパ節を位置決定する方法であって、該方法は、
磁性粒子を含む低浸透圧懸濁物を提供する工程;
該低浸透圧懸濁物を該患者に注射する工程;および
該磁性粒子の位置を検出することによって、注射の10分以内にリンパ節を検出する工程であって、該検出は、該検出に基づいて該リンパ節に対する医療手順を即時開始するために十分である、工程
を包含する、方法。 - 前記磁性粒子の位置を検出することによって、注射の5分以内にリンパ節を検出する工程を包含する、請求項26に記載の方法。
- 磁性温熱療法を使用して、患者を処置する方法であって、該方法は、
請求項1に記載の低浸透圧懸濁物を提供する工程;
該低浸透圧懸濁物を該患者に注射する工程;および
該患者を交流磁場に曝す工程、
を包含する、方法。
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US201361775780P | 2013-03-11 | 2013-03-11 | |
US61/775,780 | 2013-03-11 | ||
PCT/GB2014/050698 WO2014140543A1 (en) | 2013-03-11 | 2014-03-10 | Hypoosmotic solutions for lymph node detection |
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JP2009540844A (ja) * | 2006-07-03 | 2009-11-26 | ユニバーシタ デグリ スタディ ディ アルビーノ ‘カルロ ボ’ | 磁気共鳴画像法に用いる造影剤の送達 |
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CN105283202A (zh) | 2016-01-27 |
CA2904779C (en) | 2019-04-09 |
EP2968560B1 (en) | 2020-04-29 |
JP6351639B2 (ja) | 2018-07-04 |
BR112015022129B1 (pt) | 2022-04-19 |
US9808539B2 (en) | 2017-11-07 |
CN105283202B (zh) | 2019-04-23 |
EP2968560A1 (en) | 2016-01-20 |
AU2014229811B2 (en) | 2018-02-15 |
MX2015012587A (es) | 2016-10-13 |
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