WO2014054538A1 - 細胞培養部材と細胞培養方法 - Google Patents
細胞培養部材と細胞培養方法 Download PDFInfo
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- WO2014054538A1 WO2014054538A1 PCT/JP2013/076334 JP2013076334W WO2014054538A1 WO 2014054538 A1 WO2014054538 A1 WO 2014054538A1 JP 2013076334 W JP2013076334 W JP 2013076334W WO 2014054538 A1 WO2014054538 A1 WO 2014054538A1
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- C12N2537/10—Cross-linking
Definitions
- the present invention relates to a cell culture member for culturing cells such as humans and animals in vitro.
- the present invention also relates to a cell culture method for culturing cells in vitro.
- a pattern of cell-adhesive surface and non-adhesive surface is formed, thereby controlling two-dimensional cell adhesion and subsequent growth pattern.
- a cell culture support in which a temperature-responsive polymer is patterned on a substrate with a fine line width, and a cell culture method for culturing cells on the cell culture support (for example, are known) Patent Document 1). Since the cell culture support described above can pattern the cell culture site with the line width of the capillary, the structure of the cultured cells can be controlled two-dimensionally (in the film surface direction).
- vascular network is a key (essential matter) in order for cells to survive and function in three dimensions.
- the formation of this vascular network is just an array of three-dimensional vascular cells.
- the development of cell array control technology close to the tissue structure in the body is an indispensable issue for the future development of cell biology.
- an object of the present invention is to obtain a cell culture member capable of controlling the structure of cultured cells (aggregates) in a three-dimensional direction.
- the three-dimensional arrangement of the cells is controlled by utilizing the property that the cells respond to the concentration gradient of the cell growth factor.
- a hydrogel layer that releases cell growth factors slowly (gradual release) is formed in a two-dimensional pattern on a substrate.
- a culture site for example, a Matrigel layer
- cells are seeded on the culture site.
- a three-dimensional concentration gradient pattern of the cell growth factor is formed in the culture site. Cells move along this three-dimensional pattern. As a result, a cell array is formed in the culture site according to the three-dimensional concentration gradient pattern of the cell growth factor.
- the present invention has made it possible to arrange cells in three dimensions within the culture site by combining the sustained release of cell growth factors from the hydrogel and the two-dimensional pattern of the hydrogel.
- the cell culture member according to one aspect of the present invention includes: On the board, Form a pattern-like and layered hydrogel part, In the cell culture member that forms a layered culture site covering the hydrogel site, The surface of the culture site is a first cell type seeding surface, The hydrogel site is infiltrated with cell growth factor, The cell growth factor is gradually released from the hydrogel site to the culture site.
- the thickness of the hydrogel site is such that cell growth factor is gradually released from the hydrogel site to the culture site for 2 days or more and 21 days or less.
- the thickness of the hydrogel portion may be 1 ⁇ m or more and 30 mm or less.
- the cell culture member according to still another preferred embodiment of the present invention includes:
- the hydrogel part may be made of heat-crosslinked gelatin, and the water content of the hydrogel forming the hydrogel part may be 70% or more and 99% or less.
- the cell culture method according to the present invention comprises the following steps. I. A step of forming a patterned and layered hydrogel region on the substrate; A step of infiltrating a cell growth factor into the hydrogel site; c. A step of forming a layered culture site covering the hydrogel site to complete a cell culture member; A first cell type seeding step of seeding a first cell type on the surface of the culture site; The first cell type culturing step of placing the cell culture member after the first cell type seeding step under culturing conditions
- the first cell type used in the first cell type seeding step which is the step D
- the period during which the cell growth factor is gradually released from the hydrogel site to the culture site can be adjusted by changing the water content of the hydrogel within the range to 70% to 99%. Good.
- the following steps may be performed. What.
- the cell culture member according to the present invention has a hydrogel region having a certain thickness infiltrated with a cell growth factor, and since the cell growth factor is gradually released from the hydrogel region, The first cell type in culture moves and proliferates from the surface of the culture site toward the hydrogel site.
- the two-dimensional structure (surface direction of the substrate) of the cultured cells (aggregates) on the first cell type resulting from the pattern formation of the hydrogel site, but also to the layer thickness direction of the cultured site. You can control the structure to. That is, the three-dimensional structure of cultured cells (aggregates) can be controlled.
- the three-dimensional structure of cultured cells can be controlled in the same manner as the cell culture member.
- FIG. 1 is a cross-sectional explanatory view of a cell culture member.
- 2A and 2B are explanatory views of the cell culture member from which the culture site is removed.
- FIG. 2A is a cross-sectional explanatory view and
- FIG. 2B is a plan explanatory view.
- FIG. 3 is a conceptual explanatory diagram of a cell culture method according to the first cell type, FIG. 3 (a) is immediately after seeding the first cell type, FIG. 3 (b) is the initial stage of the first cell type culture, FIG. (C) is each conceptual explanatory drawing of 1st cell type culture
- FIG. 4 is a graph showing the evaluation results of the examples.
- FIG. 1 is a cross-sectional explanatory view of the cell culture member 1
- FIG. 2 is an explanatory view of the cell culture member 1 with the culture portion 13 removed
- FIG. 2 (a) is a cross-sectional explanatory view
- FIG. It is explanatory drawing.
- the cell culture member 1 is formed by forming a hydrogel region 12 on a substrate 11 and covering the hydrogel region 12 to form a culture region 13.
- the hydrogel region 12 is a carrier for sustained release of cell growth factor.
- part 12 is also an adhesion site
- the shape of the substrate 11 is usually a flat plate, a thin flat plate, or a film.
- a hydrogel portion 12 is formed in a pattern on the substrate 11, and a cell non-adhesive portion 15 is exposed at a portion without the hydrogel portion 12.
- the base material 11-1 constituting the substrate 11 is made of a cell non-adhesive material (for example, polydimethylsiloxane (hereinafter referred to as PDMS)), the substrate 11 is made of only the base material 11-1.
- PDMS polydimethylsiloxane
- the base material 11-1 is made of a cell adhesive material (for example, polyethylene terephthalate (hereinafter referred to as PET)), a cell non-adhesive material is applied in layers on the entire upper surface of the base material 11-1.
- a non-adhesive layer 11-2 is formed.
- the non-cell-adhesive layer 11-2 may or may not be present depending on the material, surface properties, etc. of the base material 11-1.
- the material of the substrate 11-1 is PDMS, PET, glass, silicon, metal (aluminum, stainless steel such as SUS304, gold, silver, etc.), metal oxide (alumina, titanium oxide, ITO, tin oxide), or the like.
- the material of the cell non-adhesion layer 11-2 is agarose, polyethylene glycol, PDMS or the like.
- the hydrogel region 12 is formed in a pattern and a layer.
- the reason for forming the pattern is to control the two-dimensional shape (in the plane direction of the substrate 11) of the cultured cell aggregate relating to the first cell type.
- part 12 is a linear form in a present Example, and becomes a pattern in which five straight lines were located in a line.
- the line width (arrow 22) of the hydrogel site formed in a pattern is not particularly limited, but is preferably 10 ⁇ m to 500 ⁇ m.
- the space between the hydrogel sites formed in a pattern (arrow 23) is not particularly limited, but is preferably 50 ⁇ m to 1000 ⁇ m.
- the hydrogel region 12 was given a height by being formed into a layer. Since the volume is given to the hydrogel site 12 by giving the height, the cell growth factor solution can be infiltrated into the hydrogel site 12 to allow storage for sustained release of the cell growth factor.
- the hydrogel region 12 is formed of a hydrogel.
- the thickness (arrow 21) of the hydrogel portion 12 formed in a layer shape is not particularly limited. It is sufficient that there is a storage amount capable of gradually releasing the cell growth factor for a time and amount sufficient for the seeded cells to move and proliferate in the direction toward the hydrogel region 12.
- the sustained release period of the cell growth factor can be adjusted.
- the water content is an index corresponding to the degree of crosslinking of the hydrogel.
- the degree of crosslinking of the hydrogel is usually from 70% to 99%, preferably from 90% to 99%. When the moisture content is within this range, sufficient cell growth factors are gradually added to direct the growth direction of the proliferating cells on the first cell type over the entire period of the cell culture on the first cell type. Because it continues to be released.
- the sustained release period of the cell growth factor required for the hydrogel region 12 is preferably 2 days or more and 21 days or less.
- part 12 is 1 micrometer or more and 3000 micrometers or less, More preferably, they are 20 micrometers or more and 70 micrometers or less. This is because cell growth factors sufficient to direct the growth direction of the cultured cells related to the first cell type continue to be released gradually over the entire period of the cell culture period related to the first cell type.
- the material of the hydrogel region 12 is gelatin, collagen, hyaluronic acid, fibroonectin, laminin, fibrin, etc., and gelatin is particularly preferable. This is because gelatin can be thermally crosslinked by heating at a relatively low temperature.
- the hydrogel region 12 is formed by (1) a method of creating a thin layer of a predetermined thickness on a glass plate, etc., cutting it out and placing it on the substrate 11, and (2) a gel using a dispenser. It can be carried out by any method such as a method of placing a material, (3) a method of overprinting by screen printing.
- the culture site 13 is formed in a layered manner covering the hydrogel site 12. Considering the planar direction of the substrate, the culture site 13 is formed in a planar shape in the planar direction. Since the hydrogel site 12 is surrounded by the cell non-adhesive portion 15 on the substrate 11 and the culture site 13 is formed in a planar shape, the culture site 13 covers the hydrogel site 12 and the cell non-adhesive portion 15. ing.
- the upper surface of the culture site 13 is a first cell seeding surface 14.
- the first cell type to be cultured is placed on the first cell type seeding surface 14.
- the upper surface of the culture site 13 is a surface farther from the substrate 11 out of the two surfaces of the culture site 13 formed in a layered manner.
- the culture site 13 is a site where the first cell type grows.
- the culture site 13 is a site where cell growth factors are gradually released from the hydrogel site 12. Furthermore, the culture site 13 is also a site where the second cell type grows.
- the layer thickness of the culture site 13, that is, the distance from the surface of the hydrogel site 12 to the first cell seeding surface 14 (indicated by the arrow 26) is 10 ⁇ m to 30 mm, preferably 100 ⁇ m to 5 mm. If the layer thickness is in this range, the effect of directing the proliferating cells on the first cell type in the direction of cell growth factor release is obtained, and the structure in the three-dimensional direction (layer thickness direction) is confirmed. Because it can be done.
- the material of the culture site 13 is matrigel, collagen or the like.
- the collagen may be a collagen gel or a collagen sponge.
- ⁇ Cell culture method> Next, a cell culture method for the first cell type will be described. Prior to cell culture, a cell culture member is prepared.
- the cell culture member is first (1) a step of forming a patterned and layered hydrogel region 12 on the substrate 11, and then (2) a step of infiltrating the cell growth factor into the hydrogel region 12 ( 3) It is completed by a step of forming a layered culture site 13 covering the hydrogel site 12.
- FIG. 3 is a conceptual explanatory diagram of a cell culture method according to the first cell type
- FIG. 3 (a) shows a state immediately after seeding the first cell type
- FIG. 3 (b) shows the first cell type culture. The initial state is shown
- FIG. 3 (c) shows the state after the first cell type culture.
- the cultured cells are seeded on the first cell type seeding surface 14 which is the surface of the culture site.
- An image of a cell related to the seeded first cell type is indicated by reference numeral 31.
- the first cell type that can suitably carry out the cell culture method of the present invention include normal human umbilical vein endothelial cells (hereinafter referred to as HUVEC), fibroblasts, endothelial cells, epithelial cells, vascular endothelial cells, vascular smooth muscles Examples include cells, lymphatic endothelial cells, bile duct epithelial cells, epidermal cells and the like.
- the cell growth factor used in the cell culture method and cell culture member of the present invention is not particularly limited as long as it is a cell growth factor having an attribute that promotes cell proliferation and migration of the first cell type.
- cell growth factor VEGF is selected when culturing HUVEC cells
- cell growth factor VEGF is selected when culturing lymphatic epithelial cells
- keratinocyte cell factor (KGF) is selected when culturing epidermal cells. Select and use.
- the seeded cells 31 relating to the first cell type are subjected to starvation treatment (Starvation treatment) before seeding. This is because movement in the direction of the cell growth factor and proliferation in the direction are further performed.
- the cell growth factor is gradually released from the hydrogel region 12 toward the culture region 13.
- An image of the released cell growth factor is indicated by arrow 34.
- the seeded cells 31 move in the direction of the cell growth factor 34 and proliferate in that direction.
- an image of the cultured cell aggregate at the initial stage of culture is indicated by reference numeral 32.
- the first cell type repeatedly moves in the direction of the released cell growth factor and proliferates in that direction.
- the cultured cell aggregate associated with the first cell type is in a state of connecting the cell seeding surface 14 and the hydrogel region 12.
- the image of the cultured cell aggregate at the end of the culture is indicated by reference numeral 33 in FIG. In this way, the three-dimensional (layer thickness direction of the culture part 13) structure of the cultured cell aggregate is controlled.
- the part surrounding the hydrogel part 12 on the substrate 11 is a cell non-adhered part 15, and the cultured cells do not reach the cell non-adhered part 15. In this way, control of the two-dimensional (plane direction of the culture site 13) structure of the cultured cell aggregate is performed.
- the cultured cell aggregate 33 has a tubular structure.
- the second cell type is seeded on the cell culture member containing the cultured cell aggregate obtained as described above.
- the second cell type is seeded at the culture site. Thereafter, the second cell type is grown under the culture condition of the cell culture member.
- the culture conditions vary depending on the cells used, but known culture methods are used.
- Examples of the second cell type are liver parenchymal cells, Ito cells, pancreatic parenchymal cells, cardiomyocytes, nerve cells, mesenchymal cells, tumor cells and the like. There is no particular limitation on the combination of the first cell type and the second cell type.
- a 30% gelatin aqueous solution was coated while heating the glass plate on a hot plate (50 ° C.). After cooling, the gelatin was cut out and placed on the agarose-coated film. Thereafter, the film was cut to obtain a gelatin pattern substrate.
- the prepared gelatin pattern base material was vacuum-dried at 140 ° C. for 48 hours to crosslink and sterilize the gelatin.
- the layer thickness of gelatin as a hydrogel site was 50 ⁇ m, the gelatin pattern was one straight line, and the line width was 70 ⁇ m.
- the prepared gelatin pattern base material was subjected to vacuum heat drying at 140 ° C. for 48 hours to crosslink the gelatin and sterilize the base material.
- Human 165165 was used as a cell growth factor.
- the cross-linked gelatin base material was immersed in an aqueous solution of HumanVEGF165 40 ng / ml, and the aqueous VEGF solution was immersed in the gelatin on the base material.
- a crosslinked gelatin base material was immersed in pure water, and pure water was immersed in gelatin on the base material.
- HUVEC was used as seeded (cultured) cells. After culturing HUVEC in a predetermined culture solution, the medium was replaced with medium199 + 0.5% FCS (calf serum) + 1% P / S (penicillin streptomycin) one day before culturing. The culture is a starvation treatment. Just before the cell culture experiment, HUVEC was peeled off by collagenase treatment. The obtained HUVEC was fluorescently labeled with PKH26.
- FCS calf serum
- P / S penicillin streptomycin
- a VEGF-impregnated gelatin patterning substrate was allowed to stand at the bottom of the 24-well plate, and a matrigel layer as a culture site was prepared at the top of the 24-well cell culture insert.
- the concentration of Matrigel was 10 mg / ml.
- Two types of cell culture members were used, one using 20 ⁇ l of the Matrigel solution and one using 50 ⁇ l. When the Matrigel solution was 20 ⁇ l, the thickness of the Matrigel layer was about 0.7 mm, and when the Matrigel solution was 50 ⁇ l, the thickness of the Matrigel layer was about 1.7 mm.
- a pure water-impregnated gelatin patterning base material was allowed to stand at the bottom of the 24-well plate, and a matrigel layer as a culture site was similarly prepared at the top of the 24-well cell culture insert.
- PKH26 fluorescently labeled HUVEC that had been starved was seeded on the surface of the matrigel layer, which is the cell seeding surface.
- the cells were cultured for 21 hours in a CO 2 incubator.
- the evaluation results are shown in FIG. Compared with the VEGF non-added group (control group), the fluorescence intensity at the bottom of the cell culture insert increased in the VEGF-impregnated gelatin base group. Thereby, HUVEC moved in the culture site (Matrigel layer) in the direction of VEGF (lower part) by VEGF released from the VEGF-impregnated gelatin patterning substrate.
- SYMBOLS 1 Cell culture member 11 Substrate 11-1 Base material 11-2 Cell non-adhesion layer 12 Hydrogel site 13 Culture site 14 First cell type seeding surface 15 Cell non-adhesion part 31 Cells seeded on the first cell type ( image) 32 Cultured cell aggregates of the first cell type Early culture (image) 33 Cell culture aggregates of the first cell type Late culture (image) 34 Released cell growth factor (image)
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Abstract
Description
基板の上に、
パターン状、かつ層状のハイドロゲル部位を形成し、
前記ハイドロゲル部位を覆って層状の培養部位を形成した細胞培養部材において、
前記培養部位の表面が第一の細胞種播種面であり、
前記ハイドロゲル部位は細胞成長因子を浸潤していて、
前記ハイドロゲル部位から前記培養部位に細胞成長因子を徐放することを特徴とする。
前記ハイドロゲル部位が熱架橋ゼラチンからなるものであってもよく、また、前記ハイドロゲル部位を形成するハイドロゲルの含水率が70%以上99%以下であってもよい。
イ.基板の上に、パターン状、かつ層状のハイドロゲル部位を形成する工程
ロ.前記ハイドロゲル部位に細胞成長因子を浸潤する工程
ハ.前記ハイドロゲル部位を覆って層状の培養部位を形成し、細胞培養部材を完成する工程
ニ.前記培養部位の表面に第一の細胞種を播種する第一細胞種播種工程
ホ.第一細胞種播種工程を終えた細胞培養部材を培養条件下に置く第一細胞種培養工程
ニの工程である第一細胞種播種工程に使用する第一の細胞種は、播種前に飢餓処理を行った細胞であってもよく、また、前記ハイドロゲル部位を形成するハイドロゲルの含水率を70%以上99%以下の範囲とし、ハイドロゲルの含水率を前記範囲内で変更することにより前記ハイドロゲル部位から前記培養部位に細胞成長因子を徐放する期間を調整するものであってもよい。
ホの工程である第一細胞種培養工程に続いて、以下の工程を行うものであってもよい。
へ.前記培養部位に第二の細胞種を播種する第二細胞種播種工程
ト.第二細胞種播種工程を終えた細胞培養部材を培養条件下に置く第二細胞種培養工程
図1は細胞培養部材1の断面説明図であり、図2は培養部位13を取り除いた細胞培養部材1の説明図であり、図2(a)は断面説明図、図2(b)は平面説明図である。
続いて第一の細胞種にかかる細胞培養方法を説明する。細胞の培養に先立ち、細胞培養部材を準備する。
ホットプレート(50℃)上で易接着処理のしてあるPETフィルム(テイジンテトロンフィルムG274)上にアガロース水溶液(80℃、5%)をバーコーティングした。オーブン中で40℃、30分間加熱乾燥した。
播種(培養)細胞はHUVECを使用した。HUVECを所定の培養液で培養後、1日前にmediumをmedium199+0.5%FCS(仔牛血清)+1%P/S (ペニシリンストレプトマイシン)に交換して培養した。当該培養は飢餓処理(starvation処理)である。細胞培養実験直前に、コラゲナーゼ処理によりHUVECをはがした。得られたHUVECをPKH26により蛍光標識した。
24well plate下部にVEGF含浸ゼラチンパターニング基材を静置し、24well cell culture insert上部に培養部位であるマトリゲル(matrigel)層を作製した。マトリゲルの濃度は10mg/mlであった。当該マトリゲル溶液を20μl用いたものと、50μl用いたものの2種類の細胞培養部材を使用した。マトリゲル溶液20μlの場合にマトリゲル層の厚さは約0.7mmであり、マトリゲル溶液50μlの場合にマトリゲル層の厚さは約1.7mmであった。コントロールは、24well plate下部に純水含浸ゼラチンパターニング基材を静置し、24well cell culture insert上部に培養部位であるマトリゲル(matrigel)層を同様に作製した。
培養終了後、プレートリーダーでcell culture insert下部の蛍光強度を測定することで、培養部位(マトリゲル層)下部へ移動したHUVEC細胞数を評価した。
11 基板
11-1 基材
11-2 細胞非接着層
12 ハイドロゲル部位
13 培養部位
14 第一の細胞種播種面
15 細胞非接着部分
31 第一の細胞種にかかる播種した細胞(イメージ)
32 第一の細胞種にかかる培養細胞集合体 培養初期(イメージ)
33 第一の細胞種にかかる養細胞集合体 培養後期(イメージ)
34 放出された細胞成長因子(イメージ)
Claims (9)
- 基板の上に、
パターン状、かつ層状のハイドロゲル部位を形成し、
前記ハイドロゲル部位を覆って層状の培養部位を形成した細胞培養部材において、
前記培養部位の表面が第一の細胞種播種面であり、
前記ハイドロゲル部位は細胞成長因子を浸潤していて、
前記ハイドロゲル部位から前記培養部位に細胞成長因子を徐放することを特徴とする細胞培養部材。 - 前記ハイドロゲル部位の厚さは、前記ハイドロゲル部位から前記培養部位に細胞成長因子を2日以上21日以下徐放する厚さであることを特徴とする請求項1に記載した細胞培養部材。
- 前記ハイドロゲル部位の厚さは、1μm以上30mm以下であることを特徴とする請求項1に記載した細胞培養部材。
- 前記ハイドロゲル部位は熱架橋ゼラチンからなるものである請求項1乃至3いずれかに記載した細胞培養部材。
- 前記ハイドロゲル部位を形成するハイドロゲルの含水率が70%以上99%以下であることを特徴とする請求項1乃至4いずれかに記載した細胞培養部材。
- 以下の工程からなる細胞培養方法。
イ.基板の上に、パターン状、かつ層状のハイドロゲル部位を形成する工程
ロ.前記ハイドロゲル部位に細胞成長因子を浸潤する工程
ハ.前記ハイドロゲル部位を覆って層状の培養部位を形成し、細胞培養部材を完成する工程
ニ.前記培養部位の表面に第一の細胞種を播種する第一細胞種播種工程
ホ.第一細胞種播種工程を終えた細胞培養部材を培養条件下に置く第一細胞種培養工程 - 請求項6に記載した細胞培養方法において、ニの工程である第一細胞種播種工程に使用する第一の細胞種は、播種前に飢餓処理を行った細胞であることを特徴とする請求項6に記載した細胞培養方法。
- 前記ハイドロゲル部位を形成するハイドロゲルの含水率を70%以上99%以下の範囲とし、ハイドロゲルの含水率を前記範囲内で変更することにより前記ハイドロゲル部位から前記培養部位に細胞成長因子を徐放する期間を調整することを特徴とする請求項6又は7いずれかに記載した細胞培養方法。
- 請求項6に記載した細胞培養方法において、
ホの工程である第一細胞種培養工程に続いて、以下の工程を行うことを特徴とする細胞培養方法。
へ.前記培養部位に第二の細胞種を播種する第二細胞種播種工程
ト.第二細胞種播種工程を終えた細胞培養部材を培養条件下に置く第二細胞種培養工程
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US14/433,483 US20150275172A1 (en) | 2012-10-05 | 2013-09-27 | Cell culture device and cell culture method |
CN201380052207.7A CN104704108A (zh) | 2012-10-05 | 2013-09-27 | 细胞培养构件和细胞培养方法 |
KR1020147036444A KR20150063316A (ko) | 2012-10-05 | 2013-09-27 | 세포배양부재와 세포배양방법 |
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US10000732B2 (en) * | 2015-11-20 | 2018-06-19 | National Health Research Institutes | Microfluidic dual-well device for highthroughput single-cell capture and culture |
JP6678520B2 (ja) * | 2016-06-01 | 2020-04-08 | 大日本印刷株式会社 | 細胞集合体の製造方法 |
WO2019161048A1 (en) * | 2018-02-14 | 2019-08-22 | The Trustees Of Columbia University In The City Of New York | Hierarchic neural microphysiological system for brain function and disorders |
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