JP2021001912A - 単核球含有血漿分離用組成物及び血液採取容器 - Google Patents
単核球含有血漿分離用組成物及び血液採取容器 Download PDFInfo
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- JP2021001912A JP2021001912A JP2020170316A JP2020170316A JP2021001912A JP 2021001912 A JP2021001912 A JP 2021001912A JP 2020170316 A JP2020170316 A JP 2020170316A JP 2020170316 A JP2020170316 A JP 2020170316A JP 2021001912 A JP2021001912 A JP 2021001912A
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Abstract
Description
本発明に係る単核球含有血漿分離用組成物は、25℃で流動性を有する有機成分(以下、「有機成分」と略記することがある)を含む。上記有機成分は、1種のみが用いられてもよく、2種以上が併用されてもよい。
本発明に係る単核球含有血漿分離用組成物は、2種以上の無機微粉末を含む。上記無機微粉末は、2種のみが用いられてもよく、3種以上が用いられてもよい。
本発明に係る単核球含有血漿分離用組成物は、本発明の効果を損なわない限り、上述した成分以外の他の成分を含んでいてもよい。本発明の単核球含有血漿分離用組成物は、例えば、上記他の成分として、有機ゲル化剤、熱可塑性エラストマー、ポリアルキレングリコール、シリコーンオイル、補助溶媒、酸化防止剤、着色剤及び水等を含んでいてもよい。上記他の成分はそれぞれ、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記単核球含有血漿分離用組成物の製造方法は特に限定されない。上記単核球含有血漿分離用組成物は、例えば、上記25℃で流動性を有する有機成分と、上記無機微粉末と、必要に応じて配合される他の成分とを混合することにより製造することができる。混合方法については特に限定されず、プラネタリミキサー、ボールミル、ディスパーなどの公知の混練機により混合してよい。
本発明に係る血液採取容器は、血液採取容器本体と、上述した単核球含有血漿分離用組成物とを備え、上記血液採取容器本体内に、上記単核球含有血漿分離用組成物が収容されている。
本発明に係る単核球含有血漿分離用組成物を用いて、血液から単核球含有血漿を分離することができる。上記単核球含有血漿の分離方法は、上述した血液採取容器本体内に血液を採取する工程(血液採取工程)と、上記血液が採取された上記血液採取容器を遠心分離する工程(遠心分離工程)とを備えることが好ましい。
樹脂:
石油樹脂(イーストマンケミカル社製「リガライトS5090」)
ジシクロペンタジエン樹脂1(コロン社製「スコレッツSU500」)
ジシクロペンタジエン樹脂2(コロン社製「スコレッツSU90」)
有機化合物:
トリメリット酸エステル(ベンゼンポリカルボン酸アルキルエステル誘導体、DIC社製「モノサイザーW700」)
親水性シリカ(微粉末シリカ、日本アエロジル社製「200CF」、比重2.2)
疎水性シリカ(微粉末シリカ、日本アエロジル社製「R974」、比重2.2)
酸化チタン粉末(石原産業社製「A−100」、比重4)
酸化亜鉛粉末(ハクスイテック社製「Zncox Super F−2」、比重5.6)
有機ゲル化剤(新日本理化社製「ゲルオールD」)
1−メチル−2−ピロリドン(補助溶媒)
熱可塑性エラストマー(日本ゼオン社製「3421C」)
25℃で流動性を有する有機成分の作製:
表1に記載の25℃で流動性を有する有機成分の材料を配合し、130℃で加熱溶解し、混合して、25℃で流動性を有する有機成分を作製した。
表1に記載の配合割合で、25℃で流動性を有する有機成分と無機微粉末とその他の成分とを混合し、単核球含有血漿分離用組成物を作製した。
配合成分の種類及び配合量を表1のように変更したこと以外は、実施例1と同様にして、単核球含有血漿分離用組成物を作製した。
(1)比重
得られた25℃で流動性を有する有機成分1滴、又は、得られた単核球含有血漿分離用組成物1滴を、比重を0.002の間隔で段階的に調整した25℃の食塩水中に順次滴下し、食塩水中における浮沈により比重を測定した。
得られた単核球含有血漿分離用組成物の25℃での粘度を、E型粘度計(東機産業社製「TVE−35」)を用いて、25℃及びせん断速度1.0秒−1の条件で測定した。
E型粘度計(東機産業社製「TVE−35」)を用いて、得られた単核球含有血漿分離用組成物を25℃及びせん断速度1.0秒−1の条件で測定し、第1の粘度値を求めた。同様に、E型粘度計(東機産業社製「TVE−35」)を用いて、得られた単核球含有血漿分離用組成物を25℃及びせん断速度2.0秒−1の条件で測定し、第2の粘度値を求めた。第1の粘度値の第2の粘度値に対する比(第1の粘度値/第2の粘度値)を算出し、単核球含有血漿分離用組成物の25℃でのチクソ指数とした。
得られた単核球含有血漿分離用組成物1.0gを、内径14mm、長さ100mmの透明なPET有底管(血液採取容器本体)の底部に収容し、ブチルゴム栓により栓をして血液採取容器を作製した。次いで、血液採取容器本体の開口端側が45°斜め下向きかつ底部側が45°斜め上向きとなるように血液採取容器を傾け、この状態で55℃に保温したオーブン中に1日間静置した。静置前後で、単核球含有血漿分離用組成物が血液採取容器の内壁に沿って下方に流れた距離を、ノギスを用いて測定した。
血液採取容器の作製:
長さ100mm、開口部の内径14mmのPET有底管(血液採取容器本体)を用意した。得られた単核球含有血漿分離用組成物1.0gを、上記血液採取容器本体の底部に収容した。また、上記血液採取容器本体の内壁に、エチレンジアミン四酢酸(EDTA)を付着させ、血液採取容器内部を50kPaに減圧し、ブチルゴム栓により密封した。このようにして、血液採取容器本体内に単核球含有血漿分離用組成物が収容されている血液採取容器を作製した。
得られた血液採取容器の上記血液採取容器本体内に血液4mLを採取した。
血液採取容器を1500Gで30分間遠心分離した。
遠心分離前に、血液採取容器本体の底部に収容されていた単核球含有血漿分離用組成物が、遠心分離後に、赤血球層と血漿層との間に移動して隔壁を良好に形成しているか否かを目視で確認した。具体的には、以下の方法で、隔壁の形成性を評価した。
○:試験(1)及び試験(2)の判定結果がともに良好
×:試験(1)又は試験(2)の判定結果が不良
「(5)隔壁の形成性」での遠心分離工程の後、上記単核球含有血漿分離用組成物により形成された隔壁上に位置する血球成分を、該血球成分よりも上方に位置する血漿で懸濁し、血球成分を含む血漿を回収した。なお、比較例3では、隔壁が形成されていなかったため、本評価を行わなかった。
顆粒球の除去率(%)=100−[(分離した血漿中に含まれる顆粒球の数(個))/(全血サンプルに含まれる顆粒球の数(個))×100]
単核球の回収率(%)=(分離した血漿中に含まれる単核球の数(個))/(全血サンプルに含まれる単核球の数(個))×100
Claims (11)
- 25℃で流動性を有する有機成分と、2種以上の無機微粉末とを含み、
25℃での比重が、1.060以上1.080以下である、単核球含有血漿分離用組成物。 - 前記25℃で流動性を有する有機成分が、樹脂を含む、請求項1に記載の単核球含有血漿分離用組成物。
- 前記25℃で流動性を有する有機成分が、前記樹脂と、ベンゼンポリカルボン酸アルキルエステル誘導体との混合物である、請求項2に記載の単核球含有血漿分離用組成物。
- 前記樹脂が、石油樹脂、シクロペンタジエン系樹脂、又はポリエステル樹脂を含む、請求項2又は3に記載の単核球含有血漿分離用組成物。
- 前記樹脂が、石油樹脂、又はシクロペンタジエン系樹脂を含む、請求項2〜4のいずれか1項に記載の単核球含有血漿分離用組成物。
- 前記無機微粉末が、微粉末シリカを含む、請求項1〜5のいずれか1項に記載の単核球含有血漿分離用組成物。
- 前記無機微粉末が、微粉末シリカと、比重が3以上である無機微粉末とを含む、請求項1〜6のいずれか1項に記載の単核球含有血漿分離用組成物。
- 前記微粉末シリカが、親水性シリカを含む、請求項6又は7に記載の単核球含有血漿分離用組成物。
- 前記微粉末シリカが、親水性シリカと、疎水性シリカとを含む、請求項6〜8のいずれか1項に記載の単核球含有血漿分離用組成物。
- 有機ゲル化剤を含む、請求項1〜9のいずれか1項に記載の単核球含有血漿分離用組成物。
- 血液採取容器本体と、
請求項1〜10のいずれか1項に記載の単核球含有血漿分離用組成物とを備え、
前記血液採取容器本体内に、前記単核球含有血漿分離用組成物が収容されている、血液採取容器。
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