JP7362894B2 - 免疫活性測定システムおよび方法 - Google Patents
免疫活性測定システムおよび方法 Download PDFInfo
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Description
本出願は、2019年7月31日に出願された米国仮出願第62/881,283号の利益を主張するものであり、この出願は、この引用によりその全体が援用されるものとする。
本発明は、全米科学財団の助成金IIP-1315895およびIIP-1431033による政府支援を受けてなされたものである。政府は、本発明について一定の権利を有する。
図2に示すように、本方法は、マイクロ流体デバイスでサンプルを受け入れるステップ、サンプルに応力を加えるステップ、サンプルに関連するデータセットを取得するステップ、データセットから特徴を抽出するステップ、抽出した特徴に基づきパラメータを導き出すステップを含むことができる。本方法は、任意選択的に、サンプルを処理するステップ、サンプルをマイクロ流体デバイス内で移送するステップ、患者の健康状態を判定するステップ、および/または任意のステップを含むことができる。
本技術の態様は、いくつかの利点および/またはメリットを与えることができる。
図1に示すように、サイトメトリーシステム10は、マイクロ流体デバイス100と、検出システム200と、コンピューティングシステム300とを含むことができる。サイトメトリーシステムは、任意選択的に、温度コントローラ500、サンプル調製モジュール400および/または任意の適切なコンポーネントを含むことができる。
図2に示すように、本方法は、マイクロ流体デバイスでサンプルを受け取るステップと、サンプルに応力を加えるステップと、サンプルに関連するデータセットを取得するステップと、データセットから特徴を抽出するステップと、抽出した特徴に基づきパラメータを導き出すステップとを含むことができる。本方法は、任意選択的に、サンプルを処理するステップ、サンプルをマイクロ流体デバイス内で移送するステップ、患者の健康状態を判定するステップ、および/または任意のステップを含むことができる。図9には、具体例が示されている。
Claims (21)
- 対象者の血液細胞に関連する軌道パラメータを導き出すための方法であって、
・対象者の複数の血液細胞をマイクロ流体チャネルで受け入れるステップと、
・前記マイクロ流体チャネルの慣性の集束領域で前記複数の血液細胞を整列および集束させるステップと、
・前記複数の血液細胞の各細胞に対して、
-前記マイクロ流体チャネルの変形領域で細胞に応力を加えるステップであって、前記変形領域が前記集束領域の下流にある、ステップと、
-細胞が前記変形領域を通過する際に、画像取得システムにより、細胞の光学データセットを取得するステップと、
-前記変形領域を通過する細胞の軌道を測定するステップであって、前記軌道が、細胞が前記変形領域を通過するときの細胞の一連の離散位置を含み、前記軌道が、細胞の重心の振動を含む、ステップと、
・対象者に関連する1または複数の軌道パラメータを導き出すステップであって、前記軌道パラメータが、前記軌道の1または複数の位置の差、合計、振幅、最大値および平均値のうちの少なくとも1つを含む、ステップとを備えることを特徴とする方法。 - 請求項1に記載の方法において、
前記振動が、流れ方向に直交する、ある位置にあり、前記軌道パラメータが、前記振動の平均振幅を含むことを特徴とする方法。 - 請求項2に記載の方法において、
前記軌道パラメータが、前記振動の3番目、4番目および5番目のサイクルに基づいて導き出されることを特徴とする方法。 - 請求項2に記載の方法において、
前記軌道パラメータが、前記振動の最初の振動サイクルを使用せずに導き出されることを特徴とする方法。 - 請求項1に記載の方法において、
前記軌道パラメータが、対象者の免疫活性化状態に関連することを特徴とする方法。 - 請求項1に記載の方法において、
前記光学データセットが、前記変形領域内の細胞の少なくとも10の画像を含むことを特徴とする方法。 - 請求項1に記載の方法において、
前記マイクロ流体デバイスを通る流体の流れが、少なくとも100のレイノルズ数を有することを特徴とする方法。 - 請求項1に記載の方法において、
前記変形領域が、伸長流領域を含むことを特徴とする方法。 - 患者の免疫活性化状態を診断する方法であって、
・流れガイドのマイクロ流体チャネルで患者の複数の血液細胞を受け入れるステップと、
・前記複数の血液細胞の各細胞に対して、
-前記流れガイドの変形領域で細胞に応力を加えるステップであって、前記応力が細胞を変形させるように構成されている、ステップと、
-細胞に応力が加えられる前、間および後に、画像取得システムを用いて、細胞の複数の画像を含む細胞の光学データセットを取得するステップと、
-細胞に関連する構造パラメータを導き出すステップであって、前記構造パラメータが複数の画像を用いて導き出される、ステップと、
-細胞に応力が加えられている間および後の、細胞の軌道に関連する軌道パラメータを導き出すステップであって、前記軌道が、細胞の重心の振動を含み、前記軌道パラメータが複数の画像に基づいて導き出される、ステップと、
・前記軌道パラメータおよび前記構造パラメータを免疫状態に相関させるモデルに基づいて、患者に関連する指標を求めるステップと、
・前記指標に基づいて、患者の免疫活性化状態を診断するステップとを備えることを特徴とする方法。 - 請求項9に記載の方法において、
各細胞について、前記軌道パラメータが、前記振動の振幅を含むことを特徴とする方法。 - 請求項10に記載の方法において、
各細胞について、前記軌道パラメータが、振動の3番目、4番目および5番目のサイクルの振幅に基づいて導き出されることを特徴とする方法。 - 請求項9に記載の方法において、
前記複数の血液細胞の白血球数を測定するステップをさらに含み、前記指標がさらに、前記白血球数に基づいて求められることを特徴とする方法。 - 請求項9に記載の方法において、
複数の血液細胞を受け入れることが、前記流れガイドにおいて毎秒少なくとも100個の細胞を受け入れることを含むことを特徴とする方法。 - 請求項9に記載の方法において、
前記軌道パラメータを導き出すことが、
・前記複数の画像の各画像内で対象物を検出すること、
・前記複数の画像の各画像を前景と背景とにセグメント化すること、並びに、
・前記前景から特徴を抽出することを含み、前記特徴が、細胞形状および軌道のうちの少なくとも一方に関連付けられていることを特徴とする方法。 - 請求項14に記載の方法において、
各画像をセグメント化することが、畳み込みニューラルネットワークを使用して各画像をセグメント化することを含むことを特徴とする方法。 - 請求項9に記載の方法において、
ギ酸溶解システムを用いて複数の血液細胞の赤血球を溶解するステップをさらに含むことを特徴とする方法。 - 請求項9に記載の方法において、
前記診断が、前記流れガイドで前記複数の血液細胞を受け入れてから10分以内に判定されることを特徴とする方法。 - 請求項9に記載の方法において、
前記免疫活性化状態が、敗血症関連状態を含むことを特徴とする方法。 - 請求項9に記載の方法において、
モデルが、線形ロジスティック回帰であることを特徴とする方法。 - 請求項19に記載の方法において、
高い敗血症発生率を含む患者セットに対応するトレーニングデータセットを使用して、線形ロジスティック回帰のパラメータのセットを決定するステップをさらに含むことを特徴とする方法。 - 請求項1乃至20の何れか一項に記載の方法を実行するように構成されていることを特徴とするシステム。
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