WO2023055068A1 - 세포 배양용 마이크로 캐리어, 이의 제조방법 및 이를 이용한 세포 배양 조성물 - Google Patents
세포 배양용 마이크로 캐리어, 이의 제조방법 및 이를 이용한 세포 배양 조성물 Download PDFInfo
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- WO2023055068A1 WO2023055068A1 PCT/KR2022/014551 KR2022014551W WO2023055068A1 WO 2023055068 A1 WO2023055068 A1 WO 2023055068A1 KR 2022014551 W KR2022014551 W KR 2022014551W WO 2023055068 A1 WO2023055068 A1 WO 2023055068A1
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- cell culture
- microcarrier
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- carbon atoms
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/14—Enzymes or microbial cells immobilised on or in an inorganic carrier
-
- 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
- C12M1/00—Apparatus for enzymology or microbiology
- C12M1/12—Apparatus for enzymology or microbiology with sterilisation, filtration or dialysis means
Definitions
- the present invention relates to providing a microcarrier for cell culture that can be more easily separated during separation and recovery of the microcarrier and the cells after cell culture, while having a low density so as to enable cell culture.
- the present invention is to provide a method for manufacturing the microcarrier for cell culture.
- the cell culture microcarrier includes at least one of hydrocarbon oil having 12 or more carbon atoms or pores derived therefrom;
- magnetic particles may include polystyrene-based particles including. That is, the polystyrene-based particles may include one kind of hydrocarbon oil having 12 or more carbon atoms, one kind of pores derived from hydrocarbon oil having 12 or more carbon atoms, or a mixture of the two.
- the fact that the polystyrene-based particles contain only one kind of hydrocarbon oil having 12 or more carbon atoms means that the hydrocarbon oil is completely phase-separated during the polymerization process, but is not lost to the outside of the particles during the polymerization and washing process, and the polystyrene-based particles having 12 or more carbon atoms Including only one type of void derived from hydrocarbon oil means a state in which the hydrocarbon oil is completely phase-separated during the polymerization process but is lost to the outside of the particles during the polymerization and washing process.
- the method of measuring the diameter of the pore is not particularly limited, but, for example, after embedding the microcarrier for cell culture in epoxy, preparing a cross section through ion milling, and then confirming the shape of the particle cross section with SEM to determine the size of the void inside the particle. diameter can be measured.
- the pores are derived from hydrocarbon oil having 12 or more carbon atoms, the pores may have a small size of 0.1 ⁇ m or more and 5 ⁇ m or less in diameter, thereby easily increasing the density of the microcarriers. can be adjusted
- the hydrocarbon oil may include a straight-chain or branched-chain saturated hydrocarbon compound having 12 or more and 50 or less carbon atoms.
- the linear or branched saturated hydrocarbon compound having 12 or more and 50 or less carbon atoms may be used alone or in combination, and examples of the straight-chain or branched saturated hydrocarbon compound having 12 or more and 50 or less carbon atoms include normal alkanes having 12 or more and 16 or less carbon atoms, isoalkanes having 12 or more and 16 or less carbon atoms, or mixtures thereof.
- cells and microcarriers can be easily separated through a difference in sedimentation speed due to gravity when microcarriers and cells are separated and recovered after cell culture.
- the magnetic particle may include a hydrophobic ligand having a hydrophobic functional group on the surface of the magnetic particle. That is, the surface-treated magnetic particle with the hydrophobic functional group may include a hydrophobic ligand having a hydrophobic functional group on the surface of the magnetic particle.
- the ligand refers to a molecule or ion bonded to the periphery of a central metal ion of a coordinated compound, and may refer to an atom or group of atoms forming a coordination bond while donating an electron pair to a central metal atom in a complex compound.
- the bent hydrocarbon chain of the unsaturated fatty acid may form a hydrophobic channel while being oriented outward of the magnetic particle.
- the magnetic particles surface-treated with the hydrophobic functional group may have a bonding structure as shown in FIG. 1 .
- the diameter of the magnetic particles surface-treated with the hydrophobic functional group may be 100 nm or more and 2000 nm or less.
- a method for measuring the diameter of the magnetic particle is not particularly limited, but may be measured using, for example, dynamic light scattering (DLS).
- the polystyrene-based particles may include at least one of hydrocarbon oil having 12 or more carbon atoms, or pores derived therefrom; and magnetic particles; may include a polystyrene-based polymer dispersed therein.
- the polystyrene-based particles may include at least one or more of a polystyrene-based polymer matrix, a hydrocarbon oil having 12 or more carbon atoms dispersed in the polystyrene-based polymer matrix, or pores derived therefrom;
- magnetic particles may include.
- the microcarrier for cell culture includes a suspension polymerization reaction product of a monomer composition containing hydrocarbon oil having 12 or more carbon atoms, magnetic particles, and styrene monomer, and the hydrocarbon oil having 12 or more carbon atoms is phase separated from polystyrene during suspension polymerization.
- a void which is a formed space, may be included.
- the magnetic particles may exist in a dispersed state in at least one of the hydrocarbon oil having 12 or more carbon atoms or pores derived therefrom.
- the amount of magnetic particles is excessively reduced to less than 0.01 part by weight with respect to 100 parts by weight of hydrocarbon oil having 12 or more carbon atoms, the magnetic properties of the microcarriers are not sufficiently realized, and thus separation and purification of microcarriers and cells after cell culture are not easy.
- the recovery process is additionally involved and the process becomes complicated.
- the amount of the ethylenically unsaturated crosslinking agent is excessively increased to 3 parts by weight or more based on 1 part by weight of the styrene monomer, the crosslinking density of the polystyrene-based polymer increases, and the overall density of the polystyrene-based particles is difficult to lower to the target level. there is.
- the content of the hydrocarbon oil may be 10 wt% or more and 30 wt% or less, or 14 wt% or more and 21 wt% or less with respect to the total weight of the monomer composition.
- the content of the hydrocarbon oil is excessively reduced, the amount of the hydrocarbon oil impregnated into the particles is reduced, making it difficult to sufficiently lower the density of the polystyrene-based particles.
- the content of the hydrocarbon oil is excessively increased, it is difficult for the polystyrene-based particles to have a spherical shape, resulting in reduced uniformity of the particles.
- Examples of the ethylenically unsaturated crosslinking agent include divinylbenzene.
- the ratio of the surface area of the polystyrene-based particles contacting micropores present on the surface of the polystyrene-based particles may be less than 0.01%.
- the total surface area of the polystyrene-based particles means the sum of the surface areas exposed to the air at the outermost part of the polystyrene-based particles, and the surface area of the polystyrene-based particles in contact with micropores present on the surface of the polystyrene-based particles is the polystyrene-based particles. It means the sum of the surface areas where the micropores present on the surface contact the outermost surface of the polystyrene-based particles.
- the micropore is a pore having a maximum diameter of micrometer size, and means a pore having a maximum diameter of 1 ⁇ m or more and 500 ⁇ m or less, for example.
- the ratio of the surface area of the polystyrene-based particles contacting the micropores present on the surface of the polystyrene-based particles can be obtained through Equation 1 below.
- the ratio (%) of the surface area of the polystyrene-based particles in contact with micropores present on the surface of the polystyrene-based particles [(contact with micropores present on the surface of the polystyrene-based particles surface area of the polystyrene-based particles) / (total surface area of the polystyrene-based particles)] * 100
- the ratio of the surface area of the polystyrene-based particles in contact with the micropores present on the surface of the polystyrene-based particles is less than 0.01%, it means that the micropores present on the surface of the polystyrene-based particles It means that there is no size pore at all, or it is extremely small enough to be regarded as almost non-existent. That is, micropores may not exist on the surface of the polystyrene-based particle.
- expanded styrene has been prepared by adding a foaming agent to lower the density of polystyrene particles, but in this case, as the distribution of diameter and density ranges of polystyrene particles is excessively widened, the yield within the range applicable as microcarriers for cell culture is secured. I had difficulty doing it.
- the ratio of the surface area of the polystyrene-based particles in contact with the micropores present on the surface of the polystyrene-based particles is less than 0.01% based on the total surface area of the polystyrene-based particles, it is different from conventional expanded styrene. Otherwise, since the foaming process by the foaming agent does not proceed at all, there is an advantage in that the distribution of the diameter range and density range of the polystyrene particles can be more precisely controlled.
- An average diameter of the microcarriers may be greater than or equal to 50 ⁇ m and less than or equal to 400 ⁇ m.
- the average diameter of the microcarriers is 50 ⁇ m or more, 75 ⁇ m or more, 100 ⁇ m or more, 120 ⁇ m or more, or 400 ⁇ m or less, 300 ⁇ m or less, 250 ⁇ m or less, 200 ⁇ m or less, or 50 ⁇ m or more and 400 ⁇ m or less.
- the average diameter of the microcarriers When the average diameter of the microcarriers satisfies the aforementioned range, cell attachment and culture performance are excellent. On the other hand, when the average diameter of the microcarriers is less than 50 ⁇ m, there is a concern that the culture efficiency may be lowered due to a small surface area capable of culturing cells, and when the average diameter is greater than 400 ⁇ m, the interaction between adherent cells is deteriorated, and in the incubator Cell density may be lowered, resulting in lower cell culture efficiency.
- the diameter of the micro-carrier means the distance between two points where a straight line passing through the center of gravity of the micro-carrier meets the outermost surface of the micro-carrier, and the average diameter of the micro-carrier is determined by looking at the micro-carrier for cell culture through an optical microscope. It can be obtained by checking the diameter of all included particles. In addition, the average particle diameter of the microcarriers can be confirmed through the diameters of all microcarriers obtained in the manufacturing process of the microcarriers or their average diameters.
- the microcarrier may have a specific surface area of 200 cm 2 /g or more and 1000 cm 2 /g or less.
- the microcarrier may have a specific surface area of 200 cm 2 /g or more, 300 cm 2 /g or more, 330 cm 2 /g or more, or 350 cm 2 /g or more, 1000 cm 2 /g or less, 500 cm 2 /g or less, 450 cm 2 /g or less, 200 cm 2 /g or more and 1000 cm 2 /g or less, 300 cm 2 /g or more and 1000 cm 2 /g or less, 300 cm 2 / g or more 500 cm 2 /g g or less, 300 cm 2 /g or more and 450 cm 2 /g or less, 330 cm 2 /g or more and 450 cm 2 /g or less, or 350 cm 2 /g or more and 450 cm 2 /g or less.
- the method for measuring the specific surface area is not particularly limited, but the specific surface area of the microcarriers can be calculated from, for example, an apparent density using the following equation.
- the primer polymer layer serves as an adhesive layer capable of introducing functional polymers to the surface of polystyrene-based particles without functional groups, thereby effectively introducing a polymer layer for cell attachment to the microcarrier surface and stably maintaining it during culture.
- primer polymer layer examples include L-dihydroxyphenylalanine (L-DOPA), dopamine, polydopamine, and norepinephrine. , epinephrine, epigallocatechin, and any one or more selected from the group consisting of derivatives thereof.
- L-DOPA L-dihydroxyphenylalanine
- dopamine dopamine
- polydopamine polydopamine
- norepinephrine norepinephrine
- epinephrine epigallocatechin
- epigallocatechin any one or more selected from the group consisting of derivatives thereof.
- polymer forming the cell adhesion inducing layer examples include gelatin, collagen, fibronectin, chitosan, polydopamine, poly-L-lysine, vitronectin, peptides including RGD, and RGD. It may include at least one selected from the group consisting of acrylic polymer, lignin, cationic dextran, and derivatives thereof.
- the primer polymer layer is too thin compared to the polystyrene-based particles, so the effect of modifying the microcarrier surface to be hydrophilic is insignificant, and exceeds 1:0.01, Since the polymer layer of the primer is thicker than the polystyrene-based particles, there is a concern that the degree of adhesion between cells and microcarriers may be reduced during cell culture.
- the surface-treated magnetic particle with the hydrophobic functional group may refer to a magnetic particle in which a hydrophobic functional group is bound to the surface of the magnetic particle.
- the magnetic particles refer to particles exhibiting magnetic properties. All materials interact with magnetic fields to generate attractive or repulsive forces. That is, when a magnetic field is applied to a material, it is magnetized, and the material is classified into a ferromagnetic material, a paramagnetic material, a diamagnetic material, a ferrimagnetic material, and the like, depending on how the material is magnetized.
- the magnetic particles may be prepared by solution synthesis, co-precipitation, sol-gel method, high energy grinding, hydrothermal synthesis, microemulsion synthesis, synthesis by thermal decomposition, or sonochemical synthesis, but are not limited thereto.
- the diameter of the magnetic particles surface-treated with the hydrophobic functional group may be 0.1 nm or more and 1000 nm or less. That is, the magnetic particles surface-treated with a hydrophobic functional group may be magnetic nanoparticles surface-treated with a hydrophobic functional group.
- the ligand refers to a molecule or ion bonded to the periphery of a central metal ion of a coordinated compound, and may refer to an atom or group of atoms forming a coordination bond while donating an electron pair to a central metal atom in a complex compound.
- the hydrophobic ligand may include a fatty acid having 2 to 20 carbon atoms or a derivative thereof, or a fatty acid amine having 2 to 20 carbon atoms or a derivative thereof.
- the fatty acid derivative may include a fatty acid ion
- the fatty acid amine derivative may include a fatty acid amine ion
- the hydrophobic ligand may include -COOH or -COO- bonded to the hydrophobic functional group and its terminal.
- the type of the fatty acid having 2 to 20 carbon atoms is not particularly limited, but may include, for example, any one of oleic acid, caproic acid, and stearic acid.
- fatty acids having 2 to 20 carbon atoms are added to a basic aqueous solution to form fatty acid ions having 2 to 20 carbon atoms and then reacted with magnetic nanoparticles to form fatty acids having 2 to 20 carbon atoms.
- a coordination bond between -COO- included at the terminal and the magnetic nanoparticles may be formed as shown in FIG. 1 .
- 5.3 g/cm 3 or less or 5 g/cm 3 or more and 6 g/cm 3 or less, 5 g/cm 3 or more and 5.8 g/cm 3 or less, 5.1 g/cm 3 or more and 5.8 g/cm 3 or less, 5.1 g /cm 3 or more and 5.5 g/cm 3 or less, 5.1 g/cm 3 or more and 5.3 g/cm 3 or less, or 5.15 g/cm 3 or more and 5.3 g/cm 3 or less.
- the amount of magnetic particles is excessively reduced to less than 0.01 part by weight with respect to 100 parts by weight of hydrocarbon oil having 12 or more carbon atoms, the magnetic properties of the microcarriers are not sufficiently realized, and thus separation and purification of microcarriers and cells after cell culture are not easy.
- the recovery process is additionally involved and the process becomes complicated.
- the amount of the ethylenically unsaturated crosslinking agent is excessively increased to 3 parts by weight or more based on 1 part by weight of the styrene monomer, the crosslinking density of the polystyrene-based polymer increases, and the overall density of the polystyrene-based particles is difficult to lower to the target level. there is.
- the method for preparing the microcarrier for cell culture may further include washing and drying the suspension polymerization product after the suspension polymerization.
- the step of washing the suspension polymerization reaction product is after filtering the suspension polymerization reaction product through a sieve of 10 ⁇ m or more and 100 ⁇ m or less, 100% ethanol and / or 5-7 times in distilled water at a high temperature of 50 °C or more and 80 °C or less Room temperature stirring may be included.
- the contents of the primer polymer layer and the cell adhesion inducing layer include all of the above-described contents in the embodiment.
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Abstract
Description
자성 입자 (g) |
저밀도 오일 (g) |
스티렌 모노머 (g) |
가교제 (g) |
개시제 (g) |
증류수 (g) |
||
소수성 개질 O (제조예) |
소수성 개질 X | ||||||
실시예1 | 0.01 | - | 25 | 70 | 25 | 1.96 | 600 |
실시예2 | 0.1 | - | 25 | 70 | 25 | 1.96 | 600 |
실시예3 | 0.5 | - | 25 | 70 | 25 | 1.96 | 600 |
실시예4 | 1 | - | 25 | 70 | 25 | 1.96 | 600 |
비교예1 | - | 25 | 70 | 25 | 1.96 | 600 | |
비교예2 | 0.1 | - | - | 70 | 25 | 1.96 | 600 |
비교예3 | 2 | - | - | 70 | 25 | 1.96 | 600 |
참고예 1 | - | 2 | 25 | 70 | 25 | 1.96 | 600 |
구분 | 입자크기 (㎛) |
공극크기 (㎛) |
겉보기밀도 (g/cm3) |
비표면적 (cm2/g) |
세포배양 효율 | 자성분리 효율 | 공극성분 분석 |
실시예1 | 168(±24) | 최소:1최대:3 | 0.996 | 358.58 | 상 | 우수 | O |
실시예2 | 159(±21) | 최소:1최대:3 | 0.999 | 377.74 | 상 | 우수 | O |
실시예3 | 154(±32) | 최소:1최대:3 | 1.013 | 384.61 | 상 | 우수 | O |
실시예4 | 164(±35) | 최소:1최대:3 | 1.030 | 355.20 | 상 | 우수 | O |
비교예1 | 179(±36) | 최소:1최대:3 | 0.995 | 336.88 | 상 | 불량 | O |
비교예2 | 174(±24) | - | 1.054 | 327.16 | 하 | 우수 | X |
비교예3 | 134(±18) | - | 1.135 | 394.50 | 하 | 우수 | X |
참고예1 | 180(±54) | 최소:1최대:3 | 1.064 | 323.62 | 상 | 불량 | O |
Claims (19)
- 탄소수 12 이상인 탄화수소 오일, 또는 이로부터 유도된 공극 중 적어도 하나 이상; 및 자성 입자;를 포함한 폴리스티렌계 입자를 포함하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 자성 입자는 소수성 작용기로 표면 처리된 자성입자를 포함하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 자성 입자는 자성 입자 표면에 소수성 작용기를 함유한 소수성 리간드를 포함하고,상기 소수성 리간드는 탄소수 2 내지 20의 지방산 또는 이의 유도체 및 탄소수 2 내지 20의 지방산 아민 또는 이의 유도체로 이루어진 군에서 선택된 1종 이상의 리간드를 포함하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 자성 입자는 금(Au), 은(Ag), 코발트(Co), 구리(Cu), 철(Fe), 크롬(Cr), 니켈(Ni), 팔라듐(Pd), 백금(Pt) 및 주석(Sn)으로 이루어지는 군으로부터 선택되는 1 종 이상의 금속 또는 그 산화물을 포함하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 탄소수 12 이상인 탄화수소 오일, 또는 이로부터 유도된 공극 중 적어도 하나 이상의 내부에 자성 입자가 분산된 상태로 존재하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 마이크로 캐리어의 겉보기 밀도가 0.95 g/cm3 이상 1.05 g/cm3 이하인, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 마이크로 캐리어의 평균 직경이 50 ㎛ 이상 400㎛ 이하이고,마이크로 캐리어의 비표면적이 200 cm2/g 이상 1000 cm2/g 이하인, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 공극의 직경이 0.1 ㎛ 이상 5 ㎛ 이하인, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 탄화수소 오일의 밀도가 0.75 g/cm3 이상 0.80 g/cm3 이하인, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 자성 입자의 밀도가 5 g/cm3 이상 6 g/cm3 이하인, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 탄화수소 오일은 탄소수 12 이상 50 이하인 직쇄 또는 분지쇄의 포화 탄화수소 화합물을 포함하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 폴리스티렌계 입자는,탄소수 12 이상인 탄화수소 오일, 자성 입자 및 스티렌 단량체가 함유된 단량체 조성물의 현탁 중합 반응 결과물을 포함하는, 세포 배양용 마이크로 캐리어.
- 제12항에 있어서,상기 단량체 조성물은 탄소수 12 이상인 탄화수소 오일 100 중량부에 대하여,자성 입자를 0.01 중량부 이상 5 중량부 이하로 포함하는, 세포 배양용 마이크로 캐리어.
- 제12항에 있어서,상기 단량체 조성물은, 스티렌 단량체 1 중량부에 대하여,에틸렌계 불포화 가교제를 0.033 중량부 초과 3 중량부 미만으로 포함하는, 세포 배양용 마이크로 캐리어.
- 제1항에 있어서,상기 폴리스티렌계 입자 표면에, 프라이머 고분자층, 세포부착 유도층, 또는 이들의 조합층이 더 포함되는, 세포 배양용 마이크로 캐리어.
- 탄소수 12 이상인 탄화수소 오일 존재하에, 자성 입자 및 스티렌 단량체가 함유된 단량체 조성물의 현탁 중합 반응을 진행하는 단계를 포함하는, 세포 배양용 마이크로 캐리어 제조방법.
- 제16항에 있어서,상기 자성 입자는 소수성 작용기로 표면 처리된 자성입자를 포함하는, 세포 배양용 마이크로 캐리어 제조방법.
- 세포 및 제1항의 세포 배양용 마이크로 캐리어를 포함하는, 세포 배양 조성물.
- 제18항에 있어서,상기 세포는 섬유아세포, 연골세포, 간엽줄기세포, CHO, HEK 293, vero cell, BHK21, MDCK 으로 이루어진 군에서 선택된 1종 이상의 화합물을 포함하는, 세포 배양 조성물.
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US5863957A (en) * | 1994-06-06 | 1999-01-26 | Biopore Corporation | Polymeric microbeads |
JP2004236553A (ja) * | 2003-02-05 | 2004-08-26 | Hitachi Ltd | マイクロキャリア並びにこれを使用した細胞培養装置及び細胞培養方法 |
JP2004313008A (ja) * | 2003-04-10 | 2004-11-11 | Pentax Corp | 細胞培養方法および細胞培養装置 |
US20160145600A1 (en) * | 2014-11-24 | 2016-05-26 | Corning Incorporated | Magnetic microcarriers |
KR20210011340A (ko) * | 2019-07-22 | 2021-02-01 | 주식회사 엘지화학 | 세포 배양용 마이크로 캐리어, 이의 제조방법 및 이를 이용하는 세포 배양 방법 |
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2022
- 2022-09-28 WO PCT/KR2022/014551 patent/WO2023055068A1/ko active Application Filing
- 2022-09-28 JP JP2023572938A patent/JP2024520035A/ja active Pending
- 2022-09-28 AU AU2022355952A patent/AU2022355952A1/en active Pending
- 2022-09-28 EP EP22876840.4A patent/EP4328294A1/en active Pending
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US5863957A (en) * | 1994-06-06 | 1999-01-26 | Biopore Corporation | Polymeric microbeads |
JP2004236553A (ja) * | 2003-02-05 | 2004-08-26 | Hitachi Ltd | マイクロキャリア並びにこれを使用した細胞培養装置及び細胞培養方法 |
JP2004313008A (ja) * | 2003-04-10 | 2004-11-11 | Pentax Corp | 細胞培養方法および細胞培養装置 |
US20160145600A1 (en) * | 2014-11-24 | 2016-05-26 | Corning Incorporated | Magnetic microcarriers |
KR20210011340A (ko) * | 2019-07-22 | 2021-02-01 | 주식회사 엘지화학 | 세포 배양용 마이크로 캐리어, 이의 제조방법 및 이를 이용하는 세포 배양 방법 |
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COSTA FÁBIO T., JARDIM KATIÚSCIA V., PALOMEC-GARFIAS ABRAHAM F., CÁCERES-VÉLEZ PAOLIN R., CHAKER JULIANO A., MEDEIROS ANDERSON M. : "Highly Magnetizable Crosslinked Chloromethylated Polystyrene-Based Nanocomposite Beads for Selective Molecular Separation of 4-Aminobenzoic Acid", ACS OMEGA, vol. 4, no. 3, 31 March 2019 (2019-03-31), US , pages 5640 - 5649, XP093052928, ISSN: 2470-1343, DOI: 10.1021/acsomega.9b00142 * |
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