JP4412621B2 - Cell separation method - Google Patents

Cell separation method Download PDF

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Publication number
JP4412621B2
JP4412621B2 JP02451797A JP2451797A JP4412621B2 JP 4412621 B2 JP4412621 B2 JP 4412621B2 JP 02451797 A JP02451797 A JP 02451797A JP 2451797 A JP2451797 A JP 2451797A JP 4412621 B2 JP4412621 B2 JP 4412621B2
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cells
liquid
cell
mpa
viscosity
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JP02451797A
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JPH10201470A (en
Inventor
政哉 澄田
修司 寺嶋
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Asahi Kasei Kuraray Medical Co Ltd
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Asahi Kasei Kuraray Medical Co Ltd
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Application filed by Asahi Kasei Kuraray Medical Co Ltd filed Critical Asahi Kasei Kuraray Medical Co Ltd
Priority to AU55763/98A priority patent/AU731766B2/en
Priority to EP98900701A priority patent/EP0987325B1/en
Priority to CA2278208A priority patent/CA2278208C/en
Priority to AT98900701T priority patent/ATE509094T1/en
Priority to CNB98802828XA priority patent/CN1330752C/en
Priority to US09/341,879 priority patent/US6268119B1/en
Priority to PCT/JP1998/000244 priority patent/WO1998032840A1/en
Publication of JPH10201470A publication Critical patent/JPH10201470A/en
Priority to US09/871,645 priority patent/US20010036624A1/en
Priority to US09/947,374 priority patent/US20020031757A1/en
Priority to US10/373,704 priority patent/US20030180705A1/en
Priority to US10/834,191 priority patent/US20040224300A1/en
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Description

【0001】
【発明の属する利用分野】
本発明は、細胞集団から特定の細胞を分離するための分離方法に関する。
【0002】
【従来の技術】
白血病などの造血器腫瘍及び固形癌の化学療法における副作用である造血障害に対して、骨髄移植療法が広く施行されている。骨髄移植療法とは、移植骨髄による致死的造血障害の回復法であるため、患者にとって致死的な大量放射線及び/又は大量化学療法(以下、大量化学療法と略す)の施行が可能となり、白血病や固形癌の治癒につながる。また、近年、骨髄と同様に末梢血中にも、これらの治療に必要な造血幹細胞が含まれていることが明らかになった。通常、これらの細胞の末梢血中での含有率はかなり低値であり、採取して骨髄移植の代わりに用いることは困難であるが、抗癌剤及び/又はG−CSF(顆粒球コロニー刺激因子)等のサイトカインを投与することにより、その含有率が増大することが明らかにされ、骨髄採取と比べると、全身麻酔が不要で安全なことから、盛んに臨床応用が行われている。更に近年、臍帯血中には末梢血よりもはるかに高濃度で造血幹細胞が含有されていることが明らかになり、臨床応用が始まった。ここで、移植法は細胞の提供者(ドナー)が誰であるかにより同種移植と自家移植に分けられる。前者は健康な他人(血縁者又は非血縁者)が提供者になり、後者は患者自身が提供者となるものである。自家移植においては全てが、また同種移植においては臍帯血を用いる場合はほとんどが移植まで凍結保存が行われる。凍結保存の前には、通常赤血球の除去が行われる。これは全血で保存した場合、保存スペースや解凍時の破壊赤血球による副作用が問題となるためである。従来、赤血球除去は遠心分離器により行われており、より分離効率を上げたい場合には比重液(例えばファルマシア社製Ficoll)を用いる比重遠心法が採用されている。本法は比重液に原料細胞を重層させる際に液面を乱してはならない等、非常に熟練を要する煩雑な操作である。特開昭61−84577号公報、特開平2−134564号公報等で操作の煩雑さを解決すべく、多くの試みがなされているが、比重液を用いるという点では変わらず、抜本的解決には至っていない。ところで、遠心分離を用いない赤血球除去法の提案も散見されるようになった。特開平8−104643号公報では赤血球と造血幹細胞及び/又は造血前駆細胞を含む細胞集団を、実質的に赤血球は通過し、白血球は捕捉するフィルターに通液した後、前記通液方法とは逆方向の液流を惹起させ、捕捉された白血球を回収することを特徴とする赤血球の除去方法が提案されている。しかしながら、特定粘度の回収液を用いると回収率が向上するとの記載は一切ない。
ところで、特開昭55−130917号公報にはフィルター、吸着剤充填カラム等に残留する体液を容器から回収する際の体液押し出し液として粘度2センチ・ポイズ(CP)以上の液体を用いる事を特徴とした体液の回収方法が開示されている。しかしながら、同公報によれば、生理食塩水等の低粘度を用いると、フィルター内に粘着している細胞をも回収してしまい好ましくない。そこで、粘着している細胞を回収しないために高粘度を用いるとしている。即ち、同公報ではほとんどフィルターを通過し、フィルター内にわずかに残存した体液を回収するための方法であり、本願とは全く異なる技術思想である。
【0003】
【発明が解決しようとする課題】
上記従来技術の問題点に鑑み、本発明は簡便な操作且つ短時間で、必要細胞と不要細胞の混合物から必要細胞を高率に回収する方法。例えば白血球、血小板、赤血球の混合物から白血球を選択的に高率に回収する方法を提供する事を目的とする。
【0004】
【課題を解決するための手段】
本発明者らは上記課題を解決すべく鋭意検討した結果、本発明を完成させたものである。即ち本発明は、白血球またはCD34陽性細胞と赤血球および血小板を含む骨髄、末梢血、臍帯血あるいはこれらを粗分離した細胞集団を、該白血球またはCD34陽性細胞を捕捉し、赤血球および血小板は実質的に通過する、容器に不織布を充填したフィルターに導入し、次に該フィルターに5mPa・s以上31.8mPa・s以下の粘度を有する液体を細胞集団の通液方向と逆方向に導入して、該フィルターに捕捉されている該白血球またはCD34陽性細胞を該フィルターより剥離し、該白血球またはCD34陽性細胞を回収することを特徴とする細胞分離方法である。また、5mPa・s以上31.8mPa・s以下の粘度を有する液体が、該白血球またはCD34陽性細胞の保存剤として使用し得るものである細胞分離方法である。
【0005】
【作用】
本発明の細胞分離方法においては、5mPa・s以上31.8mPa・s以下という特定の粘度を有する液体を回収液として使用することにより、捕捉手段に捕捉されている白血球またはCD34陽性細胞を高い回収率で、しかも簡単な操作で且つ短時間に剥離回収することができる。更に特定粘度を有する回収液に凍結保存液を用いることにより得られた細胞浮遊液は、そのまま凍結保存ができる。
【0006】
【発明の実施の形態】
本発明に用いる捕捉手段としては、捕捉材を容器に充填したものがあげられる。前記捕捉材としては水不溶性であればいかなる材質でも使用可能であるが、成型性、滅菌性や細胞毒性が低いという点で好ましいものを例示すると、ポリエチレン、ポリプリロピレン、ポリスチレン、アクリル樹脂、ナイロン、ポリエステル、ポリカーボネート、ポリアクリルアミド、ポリウレタン等の合成高分子、アガロース、セルロース、酢酸セルロース、キチン、キトサン、アルギン酸塩等の天然高分子、ハイドロキシアパタイト、ガラス、アルミナ、チタニア等の無機材料、ステンレス、チタン等の金属があげられる。また、これらの捕捉材はこのままでも用いることができるが、必要に応じ、アミノ酸、ペプチド、糖タンパク(抗体、接着分子等のバイオリガンドを含む)といった特定の細胞に親和性のあるリガンドを固定してもよい。また、捕捉材の形状としては粒状、繊維塊、織布、不織布、平板、スポンジ状多孔質体等があげられるが、体積あたりの表面積が大きいという点で不織布が好ましい。
本発明における少なくとも白血球またはCD34陽性細胞赤血球および血小板を含む細胞集団の例としては、骨髄、末梢血、臍帯血あるいはこれらを遠心分離器等により粗分離したものがあげられる
本発明においては捕捉手段に捕捉されている細胞を特定粘度を有する液体で回収するものであるが、この粘度としては5mPa・s以上31.8mPa・s以下である。粘度が5mPa・s未満では回収率は低く、31.8mPa・sを超えると、作業性が劣る。成分としては細胞への悪影響が少ないものが好ましい。いくつか例示するとポリエチレングリコール、ポリビニルピロリドン、ポリビニルアルコール等の合成高分子溶液、メチルセルロース、ゼラチン、ヒドロキシエチルデンプン、デキストラン、キチン誘導体、コラーゲン、ファイブロネクチン、アルブミン、グロブリン等の天然高分子溶液、グルコース、サッカロース、マルトース、ソルビトール、グリセリン、ジメチルスルホキシド等の有機物溶液及びこれらの混合物があげられる。また、これらを溶かす溶媒としては生理食塩水、D−PBS(ダルベッコリン酸塩緩衝液)、HBSS(ハンクス液)などの緩衝液、RPMI1640などの培地があげられる。
【0007】
また、本発明による特定の粘度を有する液体はこのまま凍結保存または液状保存に用いられるものであることがより好ましい。即ち、幹細胞の凍結保存を例にあげると、通常、前述のFicoll法等により赤血球が分離された細胞集団を洗浄後、凍結保存剤を添加して細胞浮遊液を調製し、これを液体窒素中あるいは冷凍庫内で凍結保存を行うが、本発明においては特定の粘度を有する液体に凍結保存剤を用いることにより、赤血球除去後に煩雑な操作を加えることなく、凍結保存用の細胞浮遊液とすることができる。
本発明による特定の粘度を有する液体を捕捉手段に通液する方法としては、ポンプの利用、シリンジによる注入、液体を貯留したバッグを押しつぶしで液流を惹起する方法、落差による方法があげられる。また、液体流入口と液体流出口が別々の容器からなる捕捉手段の場合は、原料血液の通液方向と同一の方向で回収液を通液するか、逆方向で通液するかに分かれるが、一般的に逆方向の方が回収率が高い傾向がある。更に、単純に通液するだけでなく、捕捉手段に振動を加えたり、ストップドフローにしても良い。また、液体流入口と液体流出口が同一の場合、例えばフラスコの場合は、フラスコに本発明による特定の粘度を有する液体をピペット等で導入してから、フラスコ本体を振る、あるいは機械的・超音波振動を加えることで細胞を回収する。
【0008】
【実施例】
以下に実施例により本発明をより詳細に説明するが、本発明はこれらにより限定されるものではない。
【実施例1】
細胞分離器の作製
容器寸法41×41×18mmで液体流出口と液体流入口を対角線上にもつポリカーボネート製容器の入口側に平均繊維径12μmのポリエステル不織布25枚を、出口側に平均繊維径2.3μmのポリエステル不織布12枚を充填した。なお、本フィルターの充填密度は0.2g/cm であった。
また、このフィルターに血小板通過性を付与する目的で、親水性ポリマーのコーティングを行った。即ち、ヒドロキシエチルメタクリレート・ジメチルアミノエチルメタクリレート共重合体の1%エタノール溶液を該フィルターの液体流入口から通液した後、窒素ガスを通して乾燥させた。
細胞分離操作
で作製した細胞分離器に末梢全血50mlを液体流入口から落差(流速約5ml/分)により通液した後、フィルター内に残存する赤血球、血小板を洗流する目的で生理食塩水30mlを通液した。その後、3.5%ポリビニルピロリドン(平均分子量36万)水溶液30mlを液体流出口からポンプを用いて100ml/分で通液し、液体流入口から細胞を回収した。なお、本回収液の粘度は20.3mPa・sであった。本細胞分離操作での白血球回収率、赤血球除去率、血小板除去率はそれぞれ75%、99%、98%であった。なお、回収率、除去率の算出方法は以下のとおりである。
回収率(%)=100×(分離後細胞数/分離前細胞数)
除去率(%)=100−100×(分離後細胞数/分離前細胞数)
【0009】
【実施例2】
▲1▼細胞分離器の作製
実施例1と同様の細胞分離器を用いた。
▲2▼細胞分離操作
3.5%ポリビニルピロリドン水溶液の代わりに40%牛血清アルブミン生理食塩水溶液を用いた以外は実施例1と同様な操作を行った。なお、本回収液の粘度は17.2mPa・sであった。本細胞分離操作での白血球回収率、赤血球除去率、血小板除去率はそれぞれ98%、95%、80%であった。
【0010】
【実施例3】
▲1▼細胞分離器の作製
実施例1と同様の細胞分離器を用いた。
▲2▼細胞分離操作
3.5%ポリビニルピロリドン水溶液の代わりに市販の凍結保存剤(極東製薬製「CP−1」、ヒドロキシエチルデンプン約18%、ジメチルスルホキシド約15%)を用いる以外は実施例1と同様な操作を行った。なお、本回収液の粘度は31.8mPa・sであった。本細胞分離操作での白血球回収率、赤血球除去率、血小板除去率はそれぞれ75%、96%、88%であった。なお、本回収液で回収された細胞はその後、前述の凍結保存剤に添付されていたプロトコールにより凍結保存が可能であった。
【0011】
【実施例4】
▲1▼細胞分離器の作製
実施例1と同様の細胞分離器を用いた。
▲2▼細胞分離操作
3.5%ポリビニルピロリドン水溶液の代わりに市販のヒドロキシエチルデンプン生理食塩水溶液(ルセル森下製「6−HES」)に牛血清アルブミンを25%になるように添加した液体を用いる以外は実施例1と同様な操作を行った。なお、本回収液の粘度は17.4mPa・sであった。本細胞分離操作での白血球回収率、赤血球除去率、血小板除去率はそれぞれ74%、96%、98%であった。なお、本回収液で回収された細胞はその後、実施例3の凍結保存剤に添付されていたプロトコールと同様な操作で凍結保存が可能であった。
【0012】
【実施例5】
細胞分離器の作製
容器寸法41×41×18mmで液体流出口と液体流入口を対角線上にもつポリカーボネート製容器の入口側に平均繊維径12μmのポリエステル不織布12枚を、出口側に平均繊維径2.3μmのマウス抗ヒトCD34モノクローナル抗体固定ポリスチレン不織布25枚を充填した。本フィルターの充填密度は0.2g/cm であった。
なお、マウス抗ヒトCD34モノクローナル抗体のポリスチレンへの固定は特開平2−261833号公報で提案されている公知のハロアセトアミド法にて行った。
細胞分離操作
で作製した細胞分離器に臍帯全血50mlを液体流入口から落差(流速約5ml/分)で通液した後、フィルター内に残存する赤血球、血小板、CD34陰性細胞を洗流する目的で生理食塩水30mlを通液した。その後、市販の凍結保存剤(極東製薬製「CP−1」)に同凍結保存剤の使用説明書に従い、25%ヒト血清アルブミン溶液を添加したもの(12%ヒドロキシエチルデンプン、10%ジメチルスルホキシド、8%ヒト血清アルブミン)を液体流出口からポンプを用いて100ml/分で通液し、液体流入口から細胞を回収した。なお、本回収液の粘度は19.0mPa・sであった。本細胞分離操作でのCD34陽性細胞回収率、CD34陽性細胞純度、赤血球除去率、血小板除去率はそれぞれ80%、93%、98%、98%であった。なお、本回収液で回収された細胞は前述の凍結保存剤に添付されていたプロトコールにより凍結保存が可能であった。
【0013】
【比較例1】
▲1▼細胞分離器の作製
実施例1と同様の細胞分離器を用いた。
▲2▼細胞分離操作
3.5%ポリビニルピロリドン水溶液の代わりに生理食塩水を用いる以外は実施例1と同様な操作を行った。なお、本回収液の粘度は1.0mPa・sであった。本細胞分離操作での白血球回収率、赤血球除去率、血小板除去率はそれぞれ31%、99%、95%であり、白血球回収率が低値であった。
【0014】
【比較例2】
▲1▼細胞分離器の作製
実施例5と同様の細胞分離器を用いた。
▲2▼細胞分離操作
市販の凍結保存剤にヒト血清アルブミンを添加したものの代わりに生理食塩水を用いる以外は実施例5と同様な操作を行った。なお、本回収液の粘度は1.0mPa・sであった。本細胞分離操作でのCD34陽性細胞回収率、CD34陽性細胞純度、赤血球除去率、血小板除去率はそれぞれ10%、73%、99%、99%であった。表1に結果のまとめを示す。
表1

Figure 0004412621
【0015】
【発明の効果】
以上示したように、本発明による細胞分離方法は簡便な操作且つ短時間で、必要細胞と不要細胞の混合物から必要細胞を高率に回収することができ、また得られた細胞浮遊液はその後の煩雑な細胞浮遊液調製操作を経ることなく凍結保存が可能なので、造血幹細胞移植分野や養子免疫療法分野の細胞処理工程における省力化に貢献するところ大である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the separation of how to isolate a particular cell from a cell population.
[0002]
[Prior art]
Bone marrow transplantation is widely used for hematopoietic disorders, which are side effects of chemotherapy for hematopoietic tumors such as leukemia and solid cancer. Bone marrow transplantation therapy is a method of recovery from fatal hematopoietic damage caused by transplanted bone marrow, so that it is possible to carry out high-dose radiation and / or high-dose chemotherapy (hereinafter abbreviated as high-dose chemotherapy) that is fatal to patients. It leads to the cure of solid cancer. In recent years, it has been clarified that peripheral blood as well as bone marrow contains hematopoietic stem cells necessary for these treatments. Usually, the content of these cells in the peripheral blood is quite low, and it is difficult to collect them and use them instead of bone marrow transplantation, but anticancer agents and / or G-CSF (granulocyte colony stimulating factor) It has been clarified that the content rate is increased by administering cytokines such as the above, and since general anesthesia is unnecessary and safe compared with bone marrow collection, it has been actively applied clinically. In recent years, it has become clear that cord blood contains hematopoietic stem cells at a much higher concentration than peripheral blood, and clinical application has begun. Here, transplantation methods are classified into allogeneic transplantation and autologous transplantation depending on who is the donor (donor) of the cells. In the former, a healthy other person (related or unrelated) is a donor, and in the latter, the patient is a donor. In autotransplantation, and in allogeneic transplantation, most cases are cryopreserved until transplantation when cord blood is used. Prior to cryopreservation, red blood cells are usually removed. This is because, when stored in whole blood, side effects due to storage space and destroyed red blood cells during thawing become a problem. Conventionally, erythrocyte removal has been performed by a centrifuge, and a specific gravity centrifuge method using a specific gravity liquid (for example, Ficoll manufactured by Pharmacia) is employed to increase the separation efficiency. This method is a cumbersome operation requiring very skill, for example, the liquid surface should not be disturbed when the raw material cells are layered on the specific gravity solution. Many attempts have been made in JP 61-84577 A, JP 2-134564 A, etc. to solve the troublesome operation, but there is no change in using a specific gravity liquid, and it is a radical solution. Has not reached. By the way, there have been some proposals of a method for removing red blood cells without using centrifugation. In JP-A-8-104643, a cell population containing erythrocytes and hematopoietic stem cells and / or hematopoietic progenitor cells is passed through a filter that substantially passes erythrocytes and leukocytes are captured. There has been proposed a method for removing red blood cells, which induces a liquid flow in the direction and collects the captured white blood cells. However, there is no description that the recovery rate is improved when a recovery liquid having a specific viscosity is used.
By the way, Japanese Patent Application Laid-Open No. 55-130917 is characterized in that a liquid having a viscosity of 2 centipoise (CP) or more is used as a body fluid extrusion liquid when collecting body fluid remaining in a filter, an adsorbent packed column or the like from a container. A method for recovering body fluid is disclosed. However, according to the publication, it is not preferable to use a low viscosity such as physiological saline because the cells adhered to the filter are also recovered. Therefore, a high viscosity is used in order not to collect the adherent cells. That is, in this publication, it is a method for recovering the body fluid that has almost passed through the filter and remained slightly in the filter, which is a technical idea completely different from the present application.
[0003]
[Problems to be solved by the invention]
In view of the above-mentioned problems of the prior art, the present invention is a method for recovering necessary cells at a high rate from a mixture of necessary cells and unnecessary cells in a simple operation and in a short time. For example the intended white blood cells, platelets, and to provide a way to selectively high rate recovery of white blood cells from a mixture of red blood cells.
[0004]
[Means for Solving the Problems]
The present inventors have completed the present invention as a result of intensive studies to solve the above-mentioned problems. That is, the present invention captures leukocytes or CD34-positive cells from bone marrow, peripheral blood, umbilical cord blood or a cell population obtained by roughly separating these cells, which contains leukocytes or CD34-positive cells and erythrocytes and platelets. And then introduced into a filter filled with a nonwoven fabric in a container, and then introduced into the filter a liquid having a viscosity of 5 mPa · s or more and 31.8 mPa · s or less in a direction opposite to the flow direction of the cell population , The cell separation method is characterized in that the leukocytes or CD34-positive cells captured by a filter are detached from the filter and the leukocytes or CD34-positive cells are collected. Further, in the cell separation method, a liquid having a viscosity of 5 mPa · s or more and 31.8 mPa · s or less can be used as a preservative for the leukocytes or CD34 positive cells.
[0005]
[Action]
In the cell separation method of the present invention, by using a liquid having a specific viscosity of 5 mPa · s or more and 31.8 mPa · s or less as a collection liquid, leukocytes or CD34 positive cells captured by the capture means are highly recovered. In addition, it can be peeled and collected in a short time with a simple operation. Furthermore, a cell suspension obtained by using a cryopreservation solution as a recovery solution having a specific viscosity can be cryopreserved as it is.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the capturing means used in the present invention include a container filled with a capturing material. Any material can be used as the capturing material as long as it is insoluble in water. Examples of preferable materials in terms of low moldability, sterility, and cytotoxicity include polyethylene, polypropylene, polystyrene, acrylic resin, nylon. Synthetic polymers such as polyester, polycarbonate, polyacrylamide, polyurethane, natural polymers such as agarose, cellulose, cellulose acetate, chitin, chitosan, alginate, inorganic materials such as hydroxyapatite, glass, alumina, titania, stainless steel, titanium And the like. In addition, these capture materials can be used as they are, but if necessary, ligands having affinity for specific cells such as amino acids, peptides, glycoproteins (including bioligands such as antibodies and adhesion molecules) are immobilized. May be. Examples of the shape of the capturing material include granular, fiber mass, woven fabric, non-woven fabric, flat plate, sponge-like porous body, and the like, but a non-woven fabric is preferable in terms of a large surface area per volume.
Examples of the cell population containing at least leukocytes or CD34 positive cells and erythrocytes and platelets in the present invention include bone marrow, peripheral blood, umbilical cord blood, or those obtained by roughly separating them with a centrifugal separator or the like. The cells trapped in the cell are collected with a liquid having a specific viscosity, and this viscosity is 5 mPa · s or more and 31.8 mPa · s or less. When the viscosity is less than 5 mPa · s, the recovery rate is low, and when it exceeds 31.8 mPa · s, workability is inferior. As the component, those having little adverse effect on cells are preferable. Some examples include synthetic polymer solutions such as polyethylene glycol, polyvinyl pyrrolidone and polyvinyl alcohol, natural polymer solutions such as methyl cellulose, gelatin, hydroxyethyl starch, dextran, chitin derivatives, collagen, fibronectin, albumin and globulin, glucose and saccharose. , Organic solutions such as maltose, sorbitol, glycerin, dimethyl sulfoxide, and mixtures thereof. Examples of the solvent for dissolving them include physiological saline, buffer solutions such as D-PBS (Dulbeccoline buffer solution) and HBSS (Hanks solution), and culture media such as RPMI 1640.
[0007]
Moreover, it is more preferable that the liquid having a specific viscosity according to the present invention is used for freezing or liquid storage as it is. That is, taking cryopreservation of stem cells as an example, usually after washing the cell population from which red blood cells have been separated by the Ficoll method described above, a cryopreservation agent is added to prepare a cell suspension, which is then stored in liquid nitrogen. Alternatively, cryopreservation is performed in a freezer. In the present invention, a cryopreservation agent is used for a liquid having a specific viscosity, so that a cell suspension for cryopreservation can be obtained without adding a complicated operation after removing red blood cells. Can do.
Examples of the method of passing a liquid having a specific viscosity through the capturing means according to the present invention include use of a pump, injection by a syringe, crushing a bag storing the liquid to induce a liquid flow, and a method using a drop. In addition, in the case of a capturing means consisting of separate containers for the liquid inlet and the liquid outlet, it can be divided into whether the recovered liquid is passed in the same direction as the flow direction of the raw blood or in the reverse direction. Generally, the recovery rate tends to be higher in the reverse direction. Furthermore, not only the liquid may be simply passed, but vibration may be applied to the capturing means or a stopped flow may be used. In addition, when the liquid inlet and the liquid outlet are the same, for example, in the case of a flask, a liquid having a specific viscosity according to the present invention is introduced into the flask with a pipette or the like, and then the flask body is shaken or mechanical / superfluous. Cells are collected by applying sonic vibration.
[0008]
【Example】
EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.
[Example 1]
Production of 1 cell separator Twenty- five polyester nonwoven fabrics having an average fiber diameter of 12 μm on the inlet side of a polycarbonate container having a container size of 41 × 41 × 18 mm and a liquid outlet and a liquid inlet on a diagonal line, and an average fiber diameter on the outlet side 12 sheets of 2.3 μm polyester nonwoven fabric were filled. The filter packing density was 0.2 g / cm 3 .
In addition, for the purpose of imparting platelet permeability to this filter, a hydrophilic polymer was coated. That is, a 1% ethanol solution of a hydroxyethyl methacrylate / dimethylaminoethyl methacrylate copolymer was passed through the liquid inlet of the filter and then dried with nitrogen gas.
2- cell separation operation
After passing 50 ml of peripheral whole blood through the cell separator prepared in 1 through a drop (flow rate of about 5 ml / min) from the liquid inlet, 30 ml of physiological saline was added for the purpose of washing out the remaining red blood cells and platelets. The liquid was passed. Thereafter, 30 ml of a 3.5% polyvinylpyrrolidone (average molecular weight 360,000) aqueous solution was passed through the liquid outlet at a rate of 100 ml / min using a pump, and the cells were recovered from the liquid inlet. The recovered liquid had a viscosity of 20.3 mPa · s. The leukocyte collection rate, red blood cell removal rate, and platelet removal rate in this cell separation operation were 75%, 99%, and 98%, respectively. The method for calculating the recovery rate and removal rate is as follows.
Recovery rate (%) = 100 × (number of cells after separation / number of cells before separation)
Removal rate (%) = 100-100 × (number of cells after separation / number of cells before separation)
[0009]
[Example 2]
(1) Production of cell separator The same cell separator as in Example 1 was used.
(2) Cell separation operation The same operation as in Example 1 was carried out except that a 40% bovine serum albumin physiological saline solution was used instead of the 3.5% polyvinylpyrrolidone aqueous solution. The recovered liquid had a viscosity of 17.2 mPa · s. The leukocyte collection rate, red blood cell removal rate, and platelet removal rate in this cell separation operation were 98%, 95%, and 80%, respectively.
[0010]
[Example 3]
(1) Production of cell separator The same cell separator as in Example 1 was used.
(2) Cell separation operation Examples were used except that a commercially available cryopreservation agent (“CP-1” manufactured by Kyokuto Pharmaceutical Co., Ltd., about 18% hydroxyethyl starch, about 15% dimethyl sulfoxide) was used instead of the 3.5% polyvinylpyrrolidone aqueous solution. The same operation as 1 was performed. The viscosity of the recovered liquid was 31.8 mPa · s. The leukocyte collection rate, red blood cell removal rate, and platelet removal rate in this cell separation operation were 75%, 96%, and 88%, respectively. The cells recovered with this recovery solution could then be cryopreserved according to the protocol attached to the aforementioned cryopreservation agent.
[0011]
[Example 4]
(1) Production of cell separator The same cell separator as in Example 1 was used.
(2) Cell separation operation Instead of a 3.5% polyvinylpyrrolidone aqueous solution, a liquid obtained by adding bovine serum albumin to 25% to a commercially available hydroxyethyl starch physiological saline solution (Russel Morishita “6-HES”) is used. Except that, the same operation as in Example 1 was performed. The recovered liquid had a viscosity of 17.4 mPa · s. The leukocyte collection rate, red blood cell removal rate, and platelet removal rate in this cell separation operation were 74%, 96%, and 98%, respectively. The cells recovered with this recovery solution could then be cryopreserved by the same operation as the protocol attached to the cryopreservation agent of Example 3.
[0012]
[Example 5]
Preparation of 1 cell separator 12 polyester nonwoven fabrics with an average fiber diameter of 12 μm on the inlet side of a polycarbonate container having a container size of 41 × 41 × 18 mm and a liquid outlet and a liquid inlet on a diagonal line, and an average fiber diameter on the outlet side 25 sheets mouse anti-human CD34 monoclonal antibodies secured polystyrene nonwoven 2.3μm was filled. The packing density of this filter was 0.2 g / cm 3 .
The mouse anti-human CD34 monoclonal antibody was immobilized on polystyrene by a known haloacetamide method proposed in JP-A-2-261833.
2- cell separation operation
In order to wash out red blood cells, platelets, and CD34 negative cells remaining in the filter after passing 50 ml of umbilical cord whole blood through the cell separator prepared in 1 with a drop (flow rate of about 5 ml / min) from the liquid inlet. 30 ml of saline solution was passed through. Thereafter, a commercially available cryopreservation agent (“CP-1” manufactured by Kyokuto Pharmaceutical Co., Ltd.) added with a 25% human serum albumin solution according to the instructions for use of the cryopreservation agent (12% hydroxyethyl starch, 10% dimethyl sulfoxide, 8% human serum albumin) was passed through the liquid outlet at 100 ml / min using a pump, and the cells were collected from the liquid inlet. The recovered liquid had a viscosity of 19.0 mPa · s. The CD34-positive cell recovery rate, CD34-positive cell purity, erythrocyte removal rate, and platelet removal rate in this cell separation operation were 80%, 93%, 98%, and 98%, respectively. The cells recovered with this recovery solution could be cryopreserved according to the protocol attached to the aforementioned cryopreservation agent.
[0013]
[Comparative Example 1]
(1) Production of cell separator The same cell separator as in Example 1 was used.
(2) Cell separation operation The same operation as in Example 1 was carried out except that physiological saline was used in place of the 3.5% polyvinylpyrrolidone aqueous solution. The recovered liquid had a viscosity of 1.0 mPa · s. The leukocyte collection rate, erythrocyte removal rate, and platelet removal rate in this cell separation operation were 31%, 99%, and 95%, respectively, and the leukocyte collection rate was low.
[0014]
[Comparative Example 2]
(1) Production of cell separator The same cell separator as in Example 5 was used.
(2) Cell separation operation The same operation as in Example 5 was carried out except that physiological saline was used in place of the commercially available cryopreservation agent added with human serum albumin. The recovered liquid had a viscosity of 1.0 mPa · s. The CD34-positive cell recovery rate, CD34-positive cell purity, erythrocyte removal rate, and platelet removal rate in this cell separation operation were 10%, 73%, 99%, and 99%, respectively. Table 1 summarizes the results.
Table 1
Figure 0004412621
[0015]
【The invention's effect】
As described above, the cell separation method according to the present invention can recover necessary cells from a mixture of necessary cells and unnecessary cells at a high rate in a simple operation and in a short time. Therefore, it can be cryopreserved without going through the complicated cell suspension preparation procedure, which greatly contributes to labor saving in the cell treatment process in the field of hematopoietic stem cell transplantation and adoptive immunotherapy.

Claims (2)

白血球またはCD34陽性細胞と赤血球および血小板を含む骨髄、末梢血、臍帯血あるいはこれらを粗分離した細胞集団を、該白血球またはCD34陽性細胞を捕捉し、赤血球および血小板は実質的に通過する、容器に不織布を充填したフィルターに導入し、次に該フィルターに5mPa・s以上31.8mPa・s以下の粘度を有する液体を細胞集団の通液方向と逆方向に導入して、該フィルターに捕捉されている該白血球またはCD34陽性細胞を該フィルターより剥離し、該白血球またはCD34陽性細胞を回収することを特徴とする細胞分離方法。Bone marrow, peripheral blood, umbilical cord blood containing leukocytes or CD34 positive cells and erythrocytes and platelets or a cell population obtained by roughly separating them is captured in the vessel, and the red blood cells and platelets substantially pass through the container. A liquid having a viscosity of 5 mPa · s or more and 31.8 mPa · s or less is introduced into the filter filled with the nonwoven fabric in the direction opposite to the flow direction of the cell population , and is captured by the filter. A method for separating cells, comprising separating the leukocytes or CD34 positive cells from the filter and collecting the leukocytes or CD34 positive cells. 5mPa・s以上31.8mPa・s以下の粘度を有する液体が、該白血球またはCD34陽性細胞の保存剤として使用し得るものである請求項1記載の細胞分離方法。  The cell separation method according to claim 1, wherein a liquid having a viscosity of 5 mPa · s to 31.8 mPa · s can be used as a preservative for the leukocytes or CD34 positive cells.
JP02451797A 1997-01-24 1997-01-24 Cell separation method Expired - Lifetime JP4412621B2 (en)

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JP02451797A JP4412621B2 (en) 1997-01-24 1997-01-24 Cell separation method
PCT/JP1998/000244 WO1998032840A1 (en) 1997-01-24 1998-01-22 Method for separating cells
CA2278208A CA2278208C (en) 1997-01-24 1998-01-22 Cell separation method
AT98900701T ATE509094T1 (en) 1997-01-24 1998-01-22 METHOD OF CELL SEPARATION
CNB98802828XA CN1330752C (en) 1997-01-24 1998-01-22 Method for separating cells
US09/341,879 US6268119B1 (en) 1997-01-24 1998-01-22 Method for separating cells
AU55763/98A AU731766B2 (en) 1997-01-24 1998-01-22 Cell separation method
EP98900701A EP0987325B1 (en) 1997-01-24 1998-01-22 Method for separating cells
US09/871,645 US20010036624A1 (en) 1997-01-24 2001-06-04 Cell separation method
US09/947,374 US20020031757A1 (en) 1997-01-24 2001-09-07 Method of regenerating a tissue
US10/373,704 US20030180705A1 (en) 1997-01-24 2003-02-27 Method of regenerating blood vessels
US10/834,191 US20040224300A1 (en) 1997-01-24 2004-04-29 Method for separating nucleated cells

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