JP2020500039A - 電気穿孔を使用した、脂肪組織の低侵襲のin vivoトランスフェクションのための方法及び装置 - Google Patents
電気穿孔を使用した、脂肪組織の低侵襲のin vivoトランスフェクションのための方法及び装置 Download PDFInfo
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Abstract
Description
本出願は、2016年9月23日出願の米国仮特許出願第62/398,932号、表題「Method and Device for Minimally Invasive In Vivo Transfection of Adipose Tissue Using Electroporation」、及び2017年3月31日出願の米国仮特許出願第62/480,180号、表題「Method and Device for Minimally Invasive In Vivo Transfection of Adipose Tissue Using Electroporation」に対する優先権を主張し、それぞれはその全体が本明細書に組み込まれる。
特記しない限り、本明細書で使用されるすべての技術用語及び科学用語は、当業者によって一般に理解される意味と同じ意味を有する。矛盾する場合、定義を含む本明細書が優先する。本明細書に記載のものに類似したまたはそれに相当する方法及び材料を、本発明の実施または試験で使用できるが、以下で説明する方法及び材料が好ましい。本明細書に記載されている出版物、特許出願、特許及び他の参考文献はすべて、その全体が参照により本明細書に組み込まれる。本明細書に開示する材料、方法及び実施例は例示にすぎず、制限することを意図するものではない。
本発明は、複数の非侵襲性の平板電極を有する適用装置を含む、電気穿孔装置に関する。電気穿孔装置は、電気穿孔信号を平板電極に提供する電力供給も含むことができ、そこで電極が生体試料と電気接触するとき、電界が標的脂肪層に作成されるように、電極に供給される電気穿孔信号は主に組織の脂肪層により吸収される。この電界は、対応する脂肪細胞の細胞壁内に電気穿孔を生じさせ、それによって細胞膜の浸透性を増加させて、薬剤が、例えば細胞内に導入されるのを可能にする。図1に示すように、本発明の電気穿孔装置10は、電気穿孔(EP)信号発生器18を含有するハウジング14と、ハウジング14に着脱可能に連結したアプリケーター22と、電気穿孔前に試料の脂肪層内に薬剤(例えば脂質)の所定の量を注入する注入装置26と、を含む。
上述の装置は、電気穿孔を使用して、薬剤によって脂肪組織をトランスフェクションすることを目的とする種々の治療法で使用することができる。各処理または「設定」は、試料組織内に作成される得られた電界のサイズ、形状及び特徴に関して、柔軟性を提供する。各設定は、侵襲性の各種レベルを提供する。
2つの電極処理の設定を介して処理を管理するために、ユーザーは、処理したい区域または領域(以下「組織領域100」)に注目して、最初に患者を得る。この用途の目的のために、組織領域100は、例えば、皮膚層104、脂肪層108、及び平滑筋層112のうちの1つ以上を有する皮膚組織を含むことができる。
3つの電極の設定を介して処理を管理するために、ユーザーは、処理したい組織領域100に注目して、最初に患者を得る。この用途の目的のために、組織領域100は、上述のとおり、例えば、皮膚層104、脂肪層108及び平滑筋層112のうちの1つ以上を有する皮膚組織を含むことができる。組織領域100を選択すると、ユーザーは、組織領域100の一部を操作して、その内部にひだ120を作成する。更に具体的には、ユーザーは組織領域100を操作して、皮膚層104、脂肪層108及び平滑筋層112を含む、組織のひだ120を作成する。骨格筋は、ひだ120に含まれない。更に、得られた組織のひだ120は、第1側部124、第1側部124の反対側の第2側部128及び第1側部124と第2側部128の間に延在する上部132を含む。ひだ120は、第1側部124と第2側部128の間の距離として定義される、ひだ厚134も画定する。
3つの平板の設定による処理を行うために、ユーザーは、処理したい組織領域100に注目して、最初に患者を得る。この用途の目的のために、組織領域100は、上述のとおり、例えば、皮膚層104、脂肪層108及び平滑筋層112のうちの1つ以上を有する皮膚組織を含むことができる。処理の領域が選択されると、遠位端90が脂肪層108内に配置されるように、ユーザーは注入装置26を得て、針86を組織領域100内に挿入する。それから、ユーザーは組織領域100の脂肪層108内に予め測定した量の薬剤を注入し、注入部位116を作成する。注入が終了していると、ユーザーは組織領域100から針86を取り出す。
Claims (12)
- 組織の脂肪層の脂肪細胞を電気穿孔する方法であって、前記方法が、
第1の接触面を有する第1の電極を提供することであって、前記第1の接触面が第1の周囲長を有する、前記第1の電極を提供することと;
第2の接触面を有する第2の電極を提供することであって、前記第2の接触面が第2の周囲長を有する、前記第2の電極を提供することと;
組織のひだを得ることと;
前記第1の電極と前記第2の電極の間に前記組織のひだを配置することであって、その結果、前記第1の電極の前記第1の接触面が、前記第2の電極の前記第2の接触面の方向に向いて、その間に処理ゾーンを生成し、前記処理ゾーン内に配置される前記組織が前記組織の脂肪層を含む、前記ひだを配置することと;
電気信号を前記第1の電極及び前記第2の電極に適用することと;を含む、前記方法。 - 前記処理ゾーン内に配置される前記組織が骨格筋を含まない、請求項1に記載の方法。
- 前記組織のひだを得ることが、皮膚層、脂肪層及び平滑筋層を含む、組織のひだを得ることを含む、請求項1に記載の方法。
- 前記電気信号を前記第1の電極及び前記第2の電極に適用する前に、前記組織のひだの前記脂肪層内に所定量の薬剤を注入することを更に含む、請求項3に記載の方法。
- 前記電気信号を前記第1の電極及び前記第2の電極に適用することが、電気パルスを適用することを更に含む、請求項1に記載の方法。
- 前記電気パルスを適用することが、5ボルトと1000ボルトの間の電気パルスを適用することを含む、請求項5に記載の方法。
- 前記電気パルスを適用することが、約100マイクロ秒と約100ミリ秒の間に電気パルスを適用することを含む、請求項5に記載の方法。
- 前記電気パルスを適用することが、約1パルスと約10パルスの間で適用することを含む、請求項5に記載の方法。
- 前記第1の接触面及び前記第2の接触面のうちの少なくとも1つが、そこから延在する複数の凸部を含む、請求項1に記載の方法。
- 前記各凸部が実質的にピラミッド形状である、請求項9に記載の方法。
- 組織のひだと共に使用するための電気穿孔装置であって、前記組織のひだが皮膚層、脂肪層及び平滑筋層を含み、前記電気穿孔装置が、
フレームと;
前記フレームに連結する第1の電極であって、前記第1の電極が第1の周囲長を画定する第1の接触面を有する、前記第1の電極と;
前記第1の電極の反対側の前記フレームに連結する第2の電極であって、前記第2の電極が第2の周囲長を画定する第2の接触面を有し、ここで前記第1の接触面と前記第2の接触面がその間に処理ゾーンを画定する、前記第2の電極と;を含み、
ここで前記第1及び前記第2の電極が、前記処理ゾーン内に配置される前記組織が皮膚層、脂肪層及び表面筋層を含むように構成される、前記電気穿孔装置。 - 前記処理ゾーン内に配置される前記組織が骨格筋を含まない、請求項11に記載の電気穿孔装置。
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