JP7595066B2 - タンパク質吸着剤の被覆状態またはタンパク質の吸着状態の評価方法 - Google Patents
タンパク質吸着剤の被覆状態またはタンパク質の吸着状態の評価方法 Download PDFInfo
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- JP7595066B2 JP7595066B2 JP2022507617A JP2022507617A JP7595066B2 JP 7595066 B2 JP7595066 B2 JP 7595066B2 JP 2022507617 A JP2022507617 A JP 2022507617A JP 2022507617 A JP2022507617 A JP 2022507617A JP 7595066 B2 JP7595066 B2 JP 7595066B2
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Classifications
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
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- C—CHEMISTRY; METALLURGY
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
- C12M25/10—Hollow fibers or tubes
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
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- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
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- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
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- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
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- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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Description
本発明は、タンパク質吸着剤の被覆状態またはタンパク質の吸着状態の評価方法に関する。
近年、再生医療や創薬の開発に際し、細胞培養技術が用いられている。特に幹細胞の使用に注目が集まっており、ドナー細胞から増殖した幹細胞を用いることにより、損傷や欠陥のある組織を修復・置換する技術が盛んに研究されている。ヒトを含め動物の細胞のほとんどは、浮遊状態では生存できず、何かに接着した状態で生存する接着(足場依存)性細胞である。このため、接着(足場依存)性細胞を高密度に培養して、生体組織と類似した培養組織を得ることが行われている。上記を目的として、細胞培養基材を、フィブロネクチン、コラーゲン、ラミニンなどのタンパク質吸着剤(細胞接着因子)で被覆する。
このように構造が多様化・複雑化した培養容器に対しては、所望のタンパク質吸着剤が細胞培養基材に均一にコーティングされたかを非破壊試験で確認することは困難もしくは不可能である。
以下、適宜図面を参照しながら、本発明の実施の形態を説明する。なお、本発明は、以下の実施の形態のみには限定されない。また、各図面は説明の便宜上誇張されて表現されており、各図面における各構成要素の寸法比率が実際とは異なる場合がある。また、本発明の実施の形態を図面を参照しながら説明した場合では、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。
(1)高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材1を用意し、前記基材1に光を照射して、前記基材1の発色状態1を検出し(工程(1));
(2)高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層ならびにタンパク質検出試薬を含む被覆層が順次形成されてなる基材2を用意し、前記基材2に光を照射して、前記基材2の発色状態2を検出し(工程(2));
(3)高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材3を用意し、前記基材3にタンパク質を含む試料を導入して、基材4を得、前記基材4に光を照射して、前記基材4の発色状態3を検出し(工程(3));
(4)高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材5を用意し、前記基材5にタンパク質を含む試料を導入して、基材6を得、前記基材6に、タンパク質検出試薬を導入して、基材7を得、前記基材7に光を照射して、前記基材7の発色状態4を検出し(工程(4));
(5)前記発色状態1、2または3と前記発色状態4とを比較して、前記タンパク質吸着剤の被覆状態または前記タンパク質の吸着状態を評価する(工程(5))、ことを有する、タンパク質吸着剤の被覆状態またはタンパク質の吸着状態の評価方法に関する。上記構成によると、簡便にタンパク質吸着剤の被覆状態またはタンパク質の吸着状態を目視にて観察できる。また、複雑な構造を有する基材に対してもタンパク質の被覆状態またはタンパク質の吸着状態を非破壊試験にて評価できる。ここで、本発明の構成による上記作用効果の発揮のメカニズムは以下のように推測される。なお、本発明は下記推測に限定されるものではない。
本工程では、高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材1を用意し、前記基材1に光を照射して、前記基材1の発色状態1を検出する。なお、以下では、本工程(1)における「タンパク質吸着剤および蛍光色素を含む被覆層」を単に「被覆層1」とも称する。
のフルフリル(メタ)アクリレート由来の構成単位を有する。
好ましい形態Aでは、タンパク質吸着剤としては、テトラヒドロフルフリルアクリレート、5-[2-(アクリロイルオキシ)エチル]テトラヒドロフラン、アクリル酸2-フリルメチル、5-[2-(アクリロイルオキシ)エチル]フラン、テトラヒドロフルフリルメタクリレート、5-[2-(メタクリロイルオキシ)エチル]テトラヒドロフラン、メタクリル酸2-フリルメチル、もしくは5-[2-(メタクリロイルオキシ)エチル]フランのホモポリマー、または上記2以上からなるコポリマーがある。これらのうち、タンパク質吸着性のさらなる向上効果の観点から、タンパク質吸着剤は、ポリテトラヒドロフルフリルアクリレート(pTHFA)またはポリテトラヒドロフルフリルメタクリレートが好ましく、ポリテトラヒドロフルフリルアクリレート(pTHFA)がより好ましい。
好ましい形態Bでは、タンパク質吸着剤は、上記式(1)のフルフリル(メタ)アクリレート由来の構成単位(構成単位(1))および水酸基を有するエチレン性不飽和単量体由来の構成単位(構成単位(2))を有する。ここで、フルフリル(メタ)アクリレート(構成単位(1))は、基材にタンパク質吸着性を付与すると考えられる。また、構成単位(2)中に含まれる水酸基(-OH)が、基材表面へのタンパク質吸着性を促進すると推測される。なお、上記は推測であり、本発明は上記に限定されない。
好ましい形態Cでは、タンパク質吸着剤は、上記式(1)のフルフリル(メタ)アクリレート由来の構成単位(構成単位(1))および下記式(3)で表されるアルコキシアルキル(メタ)アクリレート由来の構成単位(3)を有する。ここで、フルフリル(メタ)アクリレート(構成単位(1))は、基材にタンパク質吸着性を付与すると考えられる。また、アルコキシアルキル(メタ)アクリレート(構成単位(3))は、基材にタンパク質吸着性(さらには抗血栓性)を付与すると考えられる。なお、上記は推測であり、本発明は上記に限定されない。
本工程では、高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層ならびにタンパク質検出試薬を含む被覆層が順次形成されてなる基材2を用意し、前記基材2に光を照射して、前記基材2の発色状態2を検出する。なお、以下では、本工程(2)における「タンパク質吸着剤および蛍光色素を含む被覆層」および「タンパク質検出試薬を含む被覆層」を、それぞれ、単に「被覆層1’」および「被覆層2’」とも称する。
本工程では、高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材3を用意し、前記基材3にタンパク質を含む試料を導入して、基材4を得、前記基材4に光を照射して、前記基材4の発色状態3を検出する。なお、以下では、本工程(3)における「タンパク質吸着剤および蛍光色素を含む被覆層」を単に「被覆層1”」とも称する。
本工程では、高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材5を用意し、前記基材5にタンパク質を含む試料を導入して、基材6を得、前記基材6に、タンパク質検出試薬を導入して、基材7を得、前記基材7に光を照射して、前記基材7の発色状態4を検出する。なお、以下では、本工程(4)における「タンパク質吸着剤および蛍光色素を含む被覆層」を単に「被覆層1’”」とも称する。
本工程では、上記工程(1)で検出した発色状態1、上記工程(2)で検出した発色状態2または上記工程(3)で検出した発色状態3と、上記工程(4)で検出した前記発色状態4と、を比較して、前記タンパク質吸着剤の被覆状態または前記タンパク質の吸着状態を評価する。
下記方法により、ポリテトラヒドロフルフリルアクリレート(pTHFA)1(重量平均分子量:600,000)を合成した。
下記方法により、ポリテトラヒドロフルフリルアクリレート(pTHFA)2(重量平均分子量:200,000)を合成した。
下記方法により、ポリテトラヒドロフルフリルアクリレート(pTHFA)3(重量平均分子量:100,000)を合成した。
(発色状態1の検出)
上記製造例3で得られたpTHFA3(Mw=100,000)(タンパク質吸着剤)3gを、300gのメタノールと混合して、pTHFA溶液を得た。このpTHFA溶液に、重合性染料 蛍光紫R13(色:蛍光紫、重合性基:メタクリル基、アクリル当量:1.2×103g/eq、最大吸収波長:559nm;富士フイルム和光純薬株式会社製)(蛍光色素)20mgを添加し、分散液を調製した。
タンパク質検出試薬であるビシンコニン酸(BCA)を銅イオンキレート剤(組成:bicinchoninic acid Cu+ complex、Thermo fisher scientific製、商品名:BCAタンパク質アッセイ)に1重量%濃度となるように添加し、BCA溶液を調製した。
リン酸緩衝液(PBS、pH=7.4)に、ウシ胎児血清(FBS)を10容積%濃度となるように添加し、タンパク質溶液を調製した。
上記(発色状態2の検出)と同様にして、BCA溶液を調製した。
(発色状態1の検出)
内径が215±10μm、肉厚が50±5μmのPAES/PVP/PA製の多孔質中空糸膜をハウジングに収納し、膜面積が2.1m2であるバイオリアクター1を作製した。
リン酸緩衝液(PBS、pH=7.4)に、ウシ胎児血清(FBS)を10%濃度となるように添加し、タンパク質溶液を調製した。
タンパク質検出試薬であるビシンコニン酸(BCA)を銅イオンキレート剤(組成:bicinchoninic acid Cu+ complex、Thermo fisher scientific製、商品名:BCAタンパク質アッセイ)に10重量%濃度となるように添加し、BCA溶液を調製した。
20…タンパク質吸着剤および蛍光色素を含む被覆層、
30…タンパク質検出試薬を含む被覆層、
31…タンパク質検出試薬、
40…タンパク質、
50…蛍光色素が励起状態となる特定波長の光。
Claims (5)
- 高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材1を用意し、前記基材1に光を照射して、前記基材1の発色状態1を検出し;
高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層ならびにタンパク質検出試薬を含む被覆層が順次形成されてなる基材2を用意し、前記基材2に光を照射して、前記基材2の発色状態2を検出し;
高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材3を用意し、前記基材3にタンパク質を含む試料を導入して、基材4を得、前記基材4に光を照射して、前記基材4の発色状態3を検出し;
高分子基材の少なくとも一方の面に、タンパク質吸着剤および蛍光色素を含む被覆層が形成されてなる基材5を用意し、前記基材5にタンパク質を含む試料を導入して、基材6を得、前記基材6に、タンパク質検出試薬を導入して、基材7を得、前記基材7に光を照射して、前記基材7の発色状態4を検出し;
前記発色状態1、2または3と前記発色状態4とを比較して、前記タンパク質吸着剤の被覆状態または前記タンパク質の吸着状態を評価する、ことを有し、
前記タンパク質吸着剤は、下記式(1):
式(1)中、R 1 は、水素原子またはメチル基であり、R 2 は、下記式(1-1)または下記式(1-2):
式(1-1)および式(1-2)中、R 3 は、炭素原子数1~3のアルキレン基である;で表される基である;
のフルフリル(メタ)アクリレート由来の構成単位を有し、
前記蛍光色素は、メタクリル基を有する、タンパク質吸着剤の被覆状態またはタンパク質の吸着状態の評価方法。 - 前記発色状態4が、前記発色状態1、2または3に比して、前記蛍光色素の光の吸収を抑制することによって生じる場合に、タンパク質が高分子基材上に吸着している、またはタンパク質吸着剤が高分子基材上に被覆されていると評価する、請求項1に記載の方法。
- 前記タンパク質検出試薬が、キノリン構造を有する、請求項1または2に記載の方法。
- 前記タンパク質検出試薬が、ビシンコニン酸である、請求項3に記載の方法。
- 前記蛍光色素が、キサンテン系色素である、請求項1~4のいずれか1項に記載の方法。
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| EP4025899B1 (en) | 2023-11-08 |
| EP4025899A1 (en) | 2022-07-13 |
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