WO2012015030A1 - シート状細胞培養物解離システム - Google Patents
シート状細胞培養物解離システム Download PDFInfo
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- WO2012015030A1 WO2012015030A1 PCT/JP2011/067435 JP2011067435W WO2012015030A1 WO 2012015030 A1 WO2012015030 A1 WO 2012015030A1 JP 2011067435 W JP2011067435 W JP 2011067435W WO 2012015030 A1 WO2012015030 A1 WO 2012015030A1
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- dissociation
- cell culture
- sheet
- cells
- reaction
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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
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/04—Cell isolation or sorting
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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
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/02—Separating microorganisms from the culture medium; Concentration of biomass
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
- C12Q1/04—Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor
- C12Q1/06—Quantitative determination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Definitions
- the present invention relates to a system and method for dissociating a sheet-shaped cell culture, and a system and method for evaluating the dissociation state of the sheet-shaped cell culture.
- a treatment system for severe heart failure has not yet been established.
- medical treatment for heart failure medical treatment with beta blockers and ACE inhibitors is performed, but for heart failure that has become so severe that these treatments are not successful, replacement therapy such as auxiliary artificial heart or heart transplantation, that is, surgical treatment Is done.
- Severe heart failure that is the subject of such surgical treatment includes those caused by advanced valvular disease and severe myocardial ischemia, acute myocardial infarction and its complications, acute myocarditis, ischemic cardiomyopathy (ICM), dilation
- ICM ischemic cardiomyopathy
- DCM dilated cardiomyopathy
- Patent Document 1 a three-dimensional sheet-shaped cell culture that can be applied to the heart including cells derived from parts other than the adult myocardium by using a temperature-responsive culture dish that applies tissue engineering. And a manufacturing method thereof (Patent Document 1).
- the dissociation of the cell culture by the enzyme reaction needs to be sufficiently performed so that the dissociated cells are appropriately evaluated so that no cell mass remains.
- the enzyme reaction time is too long, the cells are damaged and the cells cannot be evaluated appropriately. Therefore, the enzyme reaction for dissociating the cell culture must be kept to the minimum level.
- the present invention relates to appropriately dissociating a cell culture by enzymatic digestion or the like in order to perform quality control of a sheet-like cell culture used for treatment of human and animal diseases and injuries.
- An object of the present invention is to provide a system capable of easily and reliably performing a dissociation operation of cells constituting a cell culture in order to prepare cells suitable for the quality control of the sheet-shaped cell culture. It is.
- the present inventor added a cell dissociating agent such as trypsin, and appropriately stirred under temperature conditions suitable for the enzyme reaction.
- a cell dissociating agent such as trypsin
- excessive enzyme treatment and stirring operations damage cells and increase the risk of contamination.
- the dissociated state of the sheet-shaped cell culture Based on the particle size distribution of the cells, it can be mechanically evaluated, and it has been found that the entire operation can be automated, and the present invention has been completed.
- the present invention relates to the following.
- a system for dissociating a sheet-like cell culture into individual cells (i) a reaction part that dissociates the sheet-like cell culture, and (ii) a particle size distribution of cells existing in the reaction part
- the system comprising: a sensor unit that acquires information to be performed; and (iii) an analysis unit that calculates a particle size distribution of the cells from the information acquired by the sensor unit, and determines and outputs a dissociated state.
- the sheet-shaped cell culture contains skeletal myoblasts.
- the reaction adjustment unit includes at least one of an environment adjustment unit, a chemical action adjustment unit, and a mechanical action adjustment unit.
- a system for judging the dissociation state of the sheet-like cell culture (i) in the sheet-like cell culture that has undergone the dissociation process
- the system comprising: a sensor unit that acquires information related to a cell particle size distribution; and (ii) an analysis unit that calculates a cell particle size distribution from the information acquired by the sensor unit, and determines and outputs a dissociated state.
- a method of dissociating a sheet-like cell culture into individual cells wherein (i) a step of subjecting the sheet-like cell culture to a dissociation treatment, (ii) cells of the sheet-like cell culture subjected to the dissociation treatment And (iii) calculating the particle size distribution of the cells from the acquired information, determining the dissociation state, and outputting the information.
- a method for judging the dissociation state of a sheet-like cell culture comprising the step of judging and outputting the dissociation state based on the particle size distribution of cells in the sheet-like cell culture subjected to dissociation treatment .
- the dissociation operation of the cells constituting the sheet-shaped cell culture can be performed simply, reliably and automatically.
- the labor of the operator can be greatly reduced.
- an incubator for cell culture a stripping device for sheet-shaped cell cultures, a device for analyzing the characteristics of dissociated cells, for example, a cell counting device for measuring the number of cells (for example, Beckman Co., Ltd., Coulter Counter),
- a cell counting device for measuring the number of cells for example, Beckman Co., Ltd., Coulter Counter
- FIG. 1 is a block diagram of one aspect of the system of the present invention.
- FIG. 2 is a flowchart of dissociation determination processing in one aspect of the system of the present invention.
- FIG. 3 is a particle size distribution diagram of a sheet-shaped cell culture that has undergone dissociation and does not contain aggregates.
- FIG. 4 is a particle size distribution diagram of a sheet-like cell culture containing aggregates during dissociation.
- FIG. 5 shows an overall view of one aspect of the system of the present invention.
- FIG. 6 shows a partial cross-sectional view of one embodiment of the system of the present invention.
- FIG. 7 is a flowchart of dissociation determination processing in one aspect of the system of the present invention.
- FIG. 8 is a flowchart of temperature adjustment subroutine processing in one aspect of the system of the present invention.
- the present invention is a system for dissociating a sheet-like cell culture into individual cells, (I) Reaction unit for dissociating the sheet-shaped cell culture (ii) Sensor unit for obtaining information related to the particle size distribution of cells existing in the reaction unit (iii) Cell size distribution from information acquired by the sensor unit
- the present invention relates to a system including an analysis unit that calculates, determines and outputs a dissociation state.
- the present system may optionally include a reaction adjustment unit that adjusts cell dissociation in the reaction unit.
- the “sheet-like cell culture” dissociated in the system of the present invention includes any cell that can form a sheet-like cell culture.
- Examples of such cells include, but are not limited to, myoblasts (eg, skeletal myoblasts), cardiomyocytes, fibroblasts, synovial cells, epithelial cells, endothelial cells, and the like.
- myoblasts eg, skeletal myoblasts
- cardiomyocytes e.g, skeletal myoblasts
- fibroblasts fibroblasts
- synovial cells epithelial cells
- endothelial cells and the like.
- the cells can be derived from any organism capable of being treated with cell culture. Such organisms include, but are not limited to, humans, non-human primates, dogs, cats, pigs, horses, goats, sheep and the like.
- the most cell ratio is 65% or more, preferably 70% or more at the end of cell culture production. Preferably it is 75% or more.
- a “sheet-like cell culture” refers to a sheet-shaped form in which cells are connected to each other, and is typically composed of one cell layer. Including those composed of cell layers.
- the cells may be linked to each other directly and / or via an intervening substance.
- the intervening substance is not particularly limited as long as it is a substance that can connect cells at least physically (mechanically), and examples thereof include an extracellular matrix.
- the intervening substance is preferably derived from cells, in particular, derived from the cells constituting the cell culture.
- the cells are at least physically (mechanically) connected, but may be further functionally, for example, chemically or electrically connected.
- the sheet-like cell culture to be subjected to the dissociation treatment may be in a state of being attached to a culture substrate such as a culture vessel or in a state of being detached from the culture substrate.
- the sheet-shaped cell culture may be incorporated into the present system together with the culture substrate from the culture apparatus, and separation from the substrate and dissociation of cells may be performed simultaneously.
- a container containing the sheet-shaped cell culture exfoliated from the substrate may be used as the reaction container of the present system, or the exfoliated sheet-shaped culture is removed from the container and the reaction container of the present system is used. You may move to.
- the sheet-like cell culture in the present invention may represent a lot of sheet-like cell cultures composed of a plurality of sheet-like cell cultures produced under the same conditions.
- the sheet-shaped cell culture preferably does not contain a scaffold (support).
- Scaffolds may be used in the art to attach cells on and / or within its surface and maintain the physical integrity of the cell culture, eg, polyvinylidene difluoride (PVDF)
- PVDF polyvinylidene difluoride
- the cell culture according to the present invention has its physical integrity even without such scaffolds. Can be maintained.
- the cell culture in the present invention is preferably composed only of substances derived from the cells constituting the cell culture and does not contain any other substances.
- the “reaction part” refers to a part from which dissociation of the sheet-shaped cell culture is performed, and information on the particle size distribution is acquired therefrom, and a reaction container that accommodates the sheet-shaped cell culture and supports this. And a supporting portion.
- the reaction vessel and the support portion may be separated from each other or may be integrated.
- the reaction vessel is not particularly limited as long as it contains a sheet-shaped cell culture, can be dissociated, and can acquire particle size distribution-related information, and may be a commercially available cell vessel such as a petri dish, a tube, or a flask. Alternatively, it may be specially made for the present invention, and may include various materials, shapes and dimensions.
- Dissociation of the sheet-shaped cell culture is performed by, for example, acting a cell dissociation agent in a medium suitable for cell survival, such as a medium, physiological saline, and PBS. It is preferable to have a property that does not pass through cells, a property that does not deteriorate due to a cell dissociation agent or the like, a property that does not easily deteriorate, and / or a property that does not affect the state of cells.
- the shape may be a polygon having one or more faces, sides and / or vertices, a cone, a sphere, a hemisphere, or a combination thereof, and at least one for observing cells. It may have a flat surface.
- the dimensions are not particularly limited, and can be appropriately determined according to the size of the sheet-shaped cell culture, the acquisition method of the particle size distribution related information, and the like.
- Preferred dimensions include, for example, a maximum cross-sectional area of 1 to 400 cm 2 , 4 to 225 cm 2 , 9 to 144 cm 2 , 16 to 100 cm 2 , 25 to 81 cm 2 , or a maximum cross-sectional diameter of 1 to 20 cm, Examples include 2 to 15 cm, 3 to 12 cm, 4 to 10 cm, and 5 to 9 cm.
- the reaction vessel may be used multiple times or may be disposable.
- at least a part of the reaction vessel for example, the upper surface thereof may be open, and the open portion may be closed with a lid or the like as desired in order to avoid contamination. Good.
- the support is not particularly limited as long as it has a structure that can stably support the reaction vessel at least, and the present invention can be used even if various commercially available incubators, thermostats, heat blocks, hot plates, shakers, etc. are used. It may be specially made for.
- the reaction part (reaction vessel and / or support part) may be entirely or partially made of a light transmissive material. If at least the reaction vessel is made of a light transmissive material, particularly a transparent material, optical information (eg, images, laser diffraction images, etc.) regarding the dissociation state of the sheet-like cell culture in the reaction vessel Can be obtained without opening the reaction vessel.
- the part necessary for obtaining optical information is light transmissive, the same effect can be obtained even if the other part is light-shielding.
- the periphery of the reaction vessel may be covered with a light shielding material.
- the reaction part may use a property suitable for the particle size distribution measurement method to be used, or may be produced with such a property.
- a property suitable for the particle size distribution measurement method to be used or may be produced with such a property.
- at least a part of the reaction vessel may be transparent or open.
- the bottom surface of the reaction vessel may be made flat so that the state of the cells can be measured uniformly, and the bottom area of the reaction vessel is avoided in order to avoid overlapping the cells flatly during image acquisition or laser irradiation.
- a sampling port that guides the cells being dissociated into the sensor unit may be provided.
- the sampling port can be made of, for example, a resin or metal tube that can absorb cells being dissociated.
- a light source such as a lamp, an optical fiber connected to the lamp, a laser, a means for reflecting light, such as a reflector, etc. Good.
- the light source may be provided in a support portion in the vicinity of the light-transmitting portion of the reaction vessel.
- the position of the light source is not particularly limited as long as the sensor unit can acquire an image satisfactorily.
- Either the upper side, the lower side, or the side of the reaction vessel, or a plurality of light sources may be arranged at these two or more positions. It can. It is also possible to make the support portion so as to support a plurality of reaction vessels so that information can be acquired simultaneously or sequentially from the plurality of reaction vessels.
- the reaction vessel is structured to be separated into at least two parts via pores (apertures) for the electrical detection zone, and the cells being dissociated are treated as pores.
- data such as a change in voltage pulse may be acquired.
- a structure may be adopted in which cells are reciprocated through the pores by moving the two portions separated by the pores up and down. Data may be acquired both when the cell moves from one part to the other part and when the cell returns, or may be acquired either.
- the reaction vessel has a substantially donut shape, and pores through which the cells pass are provided at at least one location thereof, circulate in the reaction vessel, and generate a water flow that passes through the pores. It is good also as a structure which makes it pass on this water flow and passes a pore.
- the upstream of the pores may have a tapered shape (mortar shape) in order to avoid adhesion and damage of the cells around the pores.
- “upstream” is based on the direction of cell flow. When cells flow only in one direction, the corresponding side of the pores may be tapered, and can flow in both directions. In this case, both sides of the pores may be tapered.
- the “sensor unit” in the present invention is a part for acquiring information related to the particle size distribution of the cells present in the reaction vessel.
- Information related to the particle size distribution includes images such as still images and moving images, changes in electrical signals, laser diffraction images, three-dimensional measurement values, etc., and information suitable for the specific particle size distribution calculation method to be used. Can be acquired.
- any known method such as an image analysis method, a laser diffraction scattering method, an electrical detection band method, or a combination of these methods can be used.
- the image analysis method is a method of analyzing the acquired image, measuring the size and number of particles (such as cells) included in the image, and calculating the particle size distribution based on this, specifically, for example, Extract the contours of individual cells or cell masses from an image acquired with a CCD camera or a device that combines a microscope and a CCD camera, for example, and size indicators such as short axis diameter, long axis diameter, directional fold line Calculate diameter (Feret diameter), maximum fixed direction diameter (Krummbein diameter), area equally divided diameter (Martin diameter), long and short average diameter, circumscribed rectangle equivalent diameter, square equivalent diameter, equivalent circle diameter (Heywood diameter), projected area, etc. These are then aggregated to calculate the particle size distribution.
- the cells may be stained with a dye that stains the cytoplasm or cell membrane.
- the image analysis method can be executed if there is at least a means for acquiring an image in the reaction vessel, for example, a CCD camera, the apparatus can be simplified and the degree of freedom in design is high.
- the image may be acquired from the entire reaction container or may be acquired from a part of the reaction container. When acquiring from a part of reaction container, you may acquire from one place of reaction containers, for example, from 2, 3, 4, 5, 6, 7, 8, 9, 10 places or more. You may get it.
- sampling may be performed from a part of the reaction vessel or from a plurality of locations at the sampling port.
- the laser diffraction / scattering method is a method of calculating particle distribution based on a laser diffraction / scattering image generated by irradiating particles (for example, cells) in a medium with laser.
- particles for example, cells
- a unique diffraction / scattering pattern is generated according to the size of the particle, and this is used to estimate the size of the particle. For example, when the particle is large relative to the laser beam, the diffracted / scattered light is concentrated in the front (laser traveling direction), but as the particle gets smaller, the diffracted / scattered light distribution area spreads sideways. As the particles become even smaller, they spread to the rear.
- the size of each particle can be estimated by detecting the distribution of diffracted / scattered light (for example, light intensity distribution). Since this method detects the distribution of diffracted / scattered light, the data processing is relatively simple and the measurement time is short, so the particle size distribution can be calculated in a short time. For this reason, it is easy to calculate the particle size distribution with high frequency and in real time.
- the detection position and detection sensitivity of the detection unit for example, it is possible to detect only particles having a certain size or larger or smaller than a certain size, thereby acquiring data of all particles. Therefore, it is possible to efficiently acquire only necessary data and improve processing efficiency.
- the diffraction / scattered image may be acquired from the entire reaction container or may be acquired from a part of the reaction container.
- sampling may be performed from a part of the reaction vessel or from a plurality of locations at the sampling port.
- the electrical detection zone method is a method for estimating the volume of a particle by using a change in electric resistance (impedance) of the electrolyte solution in the pores when the particles in the electrolyte solution pass through the pores.
- the electrolyte solution corresponding to the volume of the particles is replaced by the particles in the pores, and the electric resistance of the electrolyte solution in the pores depends on the volume of the replaced electrolyte solution.
- This change can be measured by, for example, passing a current through the pore and changing the voltage pulse. Since this method uses electrical measurement values, data processing is relatively simple, and it can be applied even under conditions where it is difficult to extract the outline of a cell or cell mass.
- the sensor unit may include means for acquiring information necessary for the calculation method.
- the image analysis method may include a lens that optically enlarges or reduces an image, a CCD camera, a light source, a reflector, an amplifier (for example, an optical signal amplifier or an electric signal amplifier), and the like.
- the electrical detection band method may include an electric / electronic circuit, a pore through which a cell passes, an element for measuring an electric resistance or a voltage pulse, a digital waveform analysis processing circuit, and the like.
- the laser diffraction scattering method may include a laser, a Fourier lens, a multi-detector, a CMOS sensor, and the like.
- the sensor unit may further acquire information related to the environment in the reaction unit, and for example, information such as temperature, humidity, pressure, illuminance, carbon dioxide concentration, enzyme concentration, and vibration in the reaction unit can be measured.
- information such as temperature, humidity, pressure, illuminance, carbon dioxide concentration, enzyme concentration, and vibration in the reaction unit can be measured.
- these pieces of information may be information at a specific time point, a plurality of time points obtained at regular intervals, or acquired in real time.
- the sensor part may be independent of the reaction part or may be integrated therewith.
- the sensor part may be provided on the support part above, on the side and / or below the reaction container.
- the reaction unit has a plurality of reaction vessels, or when the system of the present invention has a plurality of reaction units, the same number of sensor units as the reaction vessels or reaction units may be provided. You may be responsible for the department. In this case, even if the installation location of the sensor unit is fixed and the reaction vessel or reaction unit is moved to the measurement position of the corresponding sensor unit, the reaction vessel or reaction unit is fixed, and the sensor unit is attached to each reaction vessel or reaction unit. You may move to the measurement position corresponding to a part. In the former case, for example, by making the support portion rotatable, a plurality of reaction vessels arranged in a ring on the support portion can be sequentially moved to the measurement position by rotating the support portion.
- the “analysis unit” in the present invention is a part that receives information from the sensor unit and analyzes the information.
- the analysis unit includes at least a processor that receives information from the sensor unit and analyzes the information, but may further include a storage unit, a control unit, an input unit, an output unit, and the like.
- the storage unit stores information received from the sensor unit, analysis results, and the like, and includes various electronic storage media such as a semiconductor memory and a hard disk.
- the control unit is a part that sends a signal to the reaction adjustment unit or the like based on the analysis result, and includes a signal generation circuit and the like.
- the input unit is a part where a system user or another system inputs information such as setting parameters as necessary.
- Various input interfaces for example, means for receiving signals such as electricity and light from other systems (electric wires) , Optical fiber, connector, wireless communication device, etc.), button, keyboard, touch panel, etc.
- the output unit is a part that emits a predetermined signal based on the analysis result, and various output interfaces, for example, means for transmitting signals such as electricity and light to other systems (electric wires, optical fibers, connectors, wireless communication devices) Etc.), monitor, printer, indicator light, buzzer, speech synthesizer, etc.
- the input unit and the output unit may be integrated as an input / output interface including an input interface and an output interface, and a general-purpose computer may be used for this purpose.
- the analysis unit performs the following processing, for example. First, information from the sensor unit is received, and the particle size distribution of the cells and the environment in the reaction unit are calculated as measurement parameters and compared with the set parameters. Then, the dissociation state of the cells and the state in the reaction part are determined from the comparison result, and it is determined whether or not the dissociation is completed, whether or not the dissociation process is stopped, and the like.
- the setting parameters necessary for the analysis of the dissociation state may be determined in advance or may be input from the input unit by the system user. When it is determined that the dissociation is complete, a signal for stopping the dissociation operation may be output from the control unit. When it is determined that the dissociation is insufficient, the control unit causes the dissociation reaction to proceed. A signal may be output.
- the dissociation operation stop signal can be output even when dissociation is insufficient, for example, when a predetermined set time is exceeded or when a predetermined dissociation state is reached.
- the predetermined set time is, for example, 0.5 to 30 minutes, 1 to 25 minutes, 2 to 20 minutes, 3 to 15 minutes, 4 to 12 minutes, 5 to 10 minutes, etc.
- the predetermined dissociated state may be, for example, a state in which the number or volume ratio of single cells is 50% or more, 60% or more, 70% or more, 80% or more, 90% or more, 95% or more, etc. May be adopted. Even if the aggregate is present to some extent, it is possible to remove the aggregate by using a separation device such as a cell strainer, and to extract only single cells that can be used for various measurement operations for subsequent quality control.
- the control unit can also control the sensor unit, and can control the measurement location and the measurement time in the reaction unit. Therefore, the setting parameter may be a parameter including a pattern in consideration of a time change.
- the setting parameter, the measurement parameter, the image acquired by the sensor unit, and the like may be displayed on a monitor, or an indicator that notifies the completion of dissociation may be turned on. The completion of the dissociation can be notified to the user by sound output such as a buzzer or voice guidance, or can be transmitted to another system via an electric signal or an optical signal.
- the comparison with the set parameter of the calculated particle size distribution can be performed in various ways.
- average particle diameter from the acquired particle size distribution related information for example, without limitation, number average diameter, length average diameter, area average diameter, mass average diameter, average surface area diameter, average volume diameter, specific surface area sphere equivalent diameter
- the median diameter (median diameter), mode diameter, etc. may be calculated and compared with the corresponding set average particle diameter, or the number or volume of particles having a particle size greater than or equal to a predetermined particle size or less or the total
- the ratio may be compared with a corresponding set value, or may be compared with a shape in which the shape of the particle size distribution diagram is set.
- the average particle size is usually large, the number or volume of particles having a predetermined particle size or larger, or the ratio thereof to the whole is large, and the particle size distribution chart shows the average particle size of a single cell.
- the shape has one or more additional peaks in the direction of increasing the particle size (usually the right side of the figure).
- the system itself and / or the user of the system can change the setting parameters, take out the dissociated cells and send them to the next step, or follow the dissociated cells. Can be performed.
- setting parameters not only parameters relating to particle size distribution of various cells but also characteristics of dissociation reaction, temperature suitable for dissociation adjustment, enzyme concentration, treatment time, amplitude and period of vibration, and the like can be set.
- the input unit may also function as an operation switch, and the camera and light source are operated via the sensor unit to grasp the dissociation state of the cells, and the optimum setting parameters are manually input from the input unit and changed. Also good.
- the initial value of the setting parameter may be easily set from the know-how.
- the “reaction adjustment unit” in the present invention is a part that adjusts cell dissociation in the reaction vessel.
- the reaction adjusting unit may include a chemical action adjusting unit, a mechanical action adjusting unit, and / or an environment adjusting unit.
- the chemical action adjusting unit is a part for adjusting the dissociation reaction of the cells in the reaction container by a chemical / biochemical action.
- the chemical action adjusting unit is a means for adjusting the amount, concentration, location and timing of chemical substances added to the reaction unit, for example, cell dissociation agents such as proteolytic enzymes, cell dissociation neutralizing agents, pH adjusting agents, dyes, etc.
- the chemical action adjusting unit may be configured to start the dissociation process by adding a cell dissociating agent to the reaction vessel.
- the chemical action adjusting unit may be configured to add a cell dissociation neutralizing agent, a cooled liquid, or the like to the reaction vessel to which the cell dissociating agent has been added, thereby terminating the dissociation process.
- the chemical action adjusting unit can be configured to increase the amount of the cell dissociation agent in the reaction container when the progress of the dissociation process is slow.
- the cell dissociating agent is not particularly limited as long as it is a substance that can dissociate the connection between cells, and for example, a proteolytic enzyme and / or a chelating agent can be used.
- proteolytic enzymes include, but are not limited to, serine proteases (trypsin, chymotrypsin, elastase, plasmin, etc.), thiol proteases (papain, cathepsin B, cathepsin H, cathepsin L, etc.), carboxyproteases (pepsin, cathepsin D, Cathepsin E, renin, etc.), metalloproteases (collagenase, dispase, etc.) and the like, for example, without limitation, EDTA, EGTA, etc. can be used.
- the cell dissociating agent may contain any one of the above components or two or more.
- the cell dissociation neutralizing agent examples include, but are not limited to, a medium suitable for cell survival, such as a medium, physiological saline, and PBS, for reducing the concentration of the cell dissociating agent, and a protein contained in the cell dissociating agent.
- a medium suitable for cell survival such as a medium, physiological saline, and PBS
- examples include a substrate of a degrading enzyme and a metal chelated by a chelating agent contained in a cell dissociating agent.
- the chemical action adjusting unit may also be configured so that the amount of liquid in the reaction vessel can be adjusted in order to avoid cells from overlapping in a plane.
- the amount of liquid in the reaction vessel can be appropriately measured by, for example, a liquid level detection sensor or a weight sensor.
- the mechanical action adjustment unit is used to adjust the dissociation reaction of cells in the reaction vessel by mechanical action.
- the reaction vessel vibrates, rotates, moves up and down, and generates ultrasonic waves and water currents in the reaction vessel.
- a mechanical action means for controlling the dissociation reaction.
- the mechanical action means include, but are not limited to, a stirring bar having various shapes and materials such as a shaker, a rod shape, a plate shape, and a propeller shape, a pump for generating a water flow, and an ultrasonic generator.
- Dissociation of the sheet-shaped cell culture can be promoted by applying a mechanical action to the reaction vessel.
- the mechanical action to be applied may be always constant or may be changed according to a predetermined signal, for example, a signal from the analysis unit.
- the environment adjusting unit is a unit for adjusting the dissociation reaction of the cells by adjusting the environment in the reaction unit.
- the environment adjusting unit adjusts the environment in the reaction unit, for example, without limitation, temperature, humidity, carbon dioxide concentration, atmospheric pressure, and the like.
- the environment adjustment unit is not limited, and includes a temperature adjustment device (including a heater, a Peltier element, a thermostat, etc.), a humidity adjustment device (eg, a dehumidification device, a humidification device, a hygrometer, a control device, etc.).
- a carbon dioxide adjusting device for example, including a carbon dioxide generating device, an exhaust device, a control device, etc.
- an atmospheric pressure adjusting device for example, including a pressure reducing device, a compressor, a control device, etc.
- the environment adjustment unit may start and advance the dissociation reaction by adjusting and maintaining the temperature in the reaction vessel at a suitable working temperature of the enzyme.
- the dissociation reaction may be suppressed / stopped by adjusting outside the temperature.
- the optimum temperature of the proteolytic enzyme may vary depending on the type thereof, and specifically, for example, it is not limited, and is 35 to 40 ° C., 36 to 39 ° C., 37 to 38 ° C., and the like.
- the temperature in the reaction vessel may be adjusted by directly heating or cooling the reaction vessel (for example, via a temperature adjusting device in contact with or close to the reaction vessel) or around the reaction vessel (for example, the reaction vessel). Or the like surrounding air) may be heated or cooled.
- the reaction adjusting unit may be inside or outside the reaction unit, and some may be inside and some may be outside.
- the reaction adjustment part may be attached to the support part, or may have a structure that supports or surrounds the reaction part. It may support or surround the reaction zone.
- the support portion and the temperature adjustment device may be integrated into a hot plate shape, or the support portion and the mechanical action adjustment portion may be integrated into a shaker shape.
- the environmental adjustment unit may be integrated into an incubator-type, or a shaker-type unit that integrates the support unit and the mechanical action adjustment unit is installed inside the incubator-type environmental adjustment unit.
- an incubator in which the support portion and the environment adjustment portion are integrated may be mounted on the shaker-like mechanical action adjustment portion.
- each component constituting the system of the present invention can be arranged in various ways as long as a predetermined purpose can be achieved, and can be combined or integrated as necessary. it can.
- FIG. 1 shows a block diagram of an aspect of the system of the present invention.
- the system includes a reaction unit including a reaction vessel and a support unit, a reaction adjustment unit including a mechanical action adjustment unit, a chemical action adjustment unit, and an environment adjustment unit, a sensor unit, a processor, a control unit, a storage unit, and an input.
- the reaction adjustment unit is integrated with the support unit in the reaction unit, the sensor unit is located in the upper part of the reaction vessel, the analysis unit is outside of these, and the analysis unit including the output unit and the output unit. They exist in a mutually connected state, and transmission / reception of setting parameters, measurement parameters, control signals, and the like is performed.
- the block diagram is merely one aspect of the system of the present invention, and it should be understood that there are many possible arrangements and combinations of each part different from the block diagram.
- FIG. 2 shows a process flow diagram of cell dissociation in one embodiment of the system of the present invention.
- the system when the system receives an instruction to start dissociation of the sheet-shaped cell culture, the system confirms the set parameters and sends parameters suitable for the cell dissociation process (set parameters) to the reaction adjusting unit.
- the environment adjusting unit in the reaction adjusting unit measures the temperature in the reaction unit and adjusts the temperature so as to be a set temperature.
- the chemical action adjusting unit in the reaction adjusting unit performs chemical / biochemical processing in the reaction unit, and promotes dissociation of the intercellular bond by the cell dissociating agent.
- a mechanical action adjusting unit in the reaction adjusting unit applies a mechanical operation to the reaction vessel, for example, an appropriate vibration to advance dissociation.
- the sensor unit acquires information related to the particle size distribution of the cells present in the reaction container.
- the analysis unit calculates the particle size distribution of the cells present in the reaction unit from the information acquired by the sensor unit.
- the proportion of single cells having a small particle size becomes dominant, so that the particle size distribution becomes substantially unimodal with a peak in the average particle size of single cells as shown in FIG. 3, for example.
- an undissociated cell mass (aggregate) remains in the middle of the dissociation treatment, for example, as shown in FIG. 4, a single cell peak (left side) with a small particle size and an aggregate with a large particle size are present. Peak (right side).
- dissociation treatment is further advanced, dissociation of the aggregate proceeds, and only the peak of a single cell having a small particle diameter is obtained, and almost no change occurs.
- the analysis unit can determine that the dissociation is complete when the change amount or change rate of the particle size distribution is less than the set parameter.
- the system outputs a dissociation completion signal and ends the processing flow.
- the reaction adjustment unit may operate independently of the analysis unit. For example, temperature adjustment and vibration adjustment by the reaction adjustment unit may be performed during the analysis process. Needless to say, it should be understood that the flow diagram is merely an example of the mode of operation of the system of the present invention, and there are many modes of operation different from the flow diagram.
- the system of the present invention includes an incubator for cell culture, a stripping device for sheet-like cell cultures, and a device for analyzing the characteristics of dissociated cells, for example, a cell counting device for measuring the number of cells (for example, Beckman's Coulter It may be connected and / or integrated with a counter), an automatic measuring apparatus for viable and dead cells for measuring viability, a flow cytometer for measuring purity, and the like.
- the present invention also includes (i) a step of subjecting the sheet-shaped cell culture to a dissociation treatment (ii) a step of obtaining information related to the particle size distribution of the cells of the sheet-shaped cell culture subjected to the dissociation treatment (iii)
- the present invention relates to a method of dissociating a sheet-shaped cell culture into individual cells, which includes a step of calculating a particle size distribution of cells from the obtained information, and determining and outputting a dissociated state.
- the dissociation treatment in this method includes any treatment capable of dissociating the cells constituting the sheet-shaped cell culture into individual single cells. Specifically, for example, the survival of cells such as culture medium, physiological saline, PBS, etc.
- the cells may be dissociated by acting a cell dissociating agent in a medium suitable for the above.
- the cell dissociation agent is as described above for the cell dissociation system.
- a proteolytic enzyme is used as a cell dissociating agent, dissociation can be promoted by adjusting and maintaining the temperature of the reaction solution containing the sheet-like cell culture at a suitable working temperature of the enzyme. The optimum temperature of the proteolytic enzyme is as described above.
- dissociation is accelerated
- This operation can be performed, for example, by vibrating, rotating, moving up and down the container containing the sheet-shaped cell culture, or generating an ultrasonic wave, a water flow, or the like in the container.
- the dissociation treatment in this method may be performed through at least the reaction unit and the reaction adjustment unit of the cell dissociation system.
- the acquisition of information related to the cell particle size distribution of the sheet-shaped cell culture subjected to the dissociation treatment, calculation of the particle size distribution, and determination of the dissociation state are as described above for the cell dissociation system. You may perform via at least a sensor part and an analysis part of a system. As one aspect of this method, the flowchart of FIG. 2 described above can be cited.
- this method may be completed by itself, it is possible to cultivate cells constituting a sheet-like cell culture, preparation of a sheet-like cell culture, detachment from a culture substrate, dissociation between cells, and analysis of dissociated cells. It may be incorporated as part of a flow from production of sheet-shaped cell culture to quality control, including steps such as (eg, survival rate, purity, etc.).
- the present invention is also a system for determining the dissociation state of a sheet-like cell culture, (I) Sensor unit that acquires information related to cell size distribution in the sheet-shaped cell culture that has undergone dissociation treatment (ii) Cell size distribution is calculated from the information acquired by the sensor unit, and the dissociation state is determined
- the present invention relates to a system including an analysis unit that outputs data.
- the sensor unit and analysis unit in this system are basically the same as the above-described sheet-shaped cell culture dissociation system.
- the sensor unit obtains information related to the cell size distribution in the dissociated sheet cell culture that exists outside the system, and the analysis unit calculates the particle size distribution based on this information.
- the dissociation state is judged and output.
- this system does not need to include the reaction part and / or reaction adjustment part with which a sheet-like cell culture dissociation system is provided.
- this system obtains information related to the particle size distribution of cells in a sheet-like cell culture that has been subjected to dissociation treatment using an incubator or shaker other than this system, such as an image, and obtains the cell It is possible to determine the dissociation state of the user and notify the user or the like by voice or lighting of an indicator.
- the present invention also relates to a method for determining the dissociation state of a sheet-like cell culture, including a step of judging the dissociation state based on the particle size distribution of cells in the sheet-like cell culture subjected to dissociation treatment.
- the details of the step of determining the dissociation state in the present method are as described above for the cell dissociation system.
- FIG. 5 and 6 show one embodiment of the cell dissociation system of the present invention.
- FIG. 5 is a schematic view of the entire system
- FIG. 6 is a cross-sectional view showing the arrangement of each element in the hood (5).
- the reaction vessel (1) containing the sheet-shaped cell culture (7) is placed on a supportable portion (2) having a temperature adjusting function and disposed in the hood (5).
- An addition nozzle (4) for injecting a cell dissociation agent and the like into the reaction container and a camera (3) for acquiring an image in the reaction container are arranged on the reaction container (1).
- the support unit includes a light source (11) that supports the reaction vessel on a temperature adjustment plate (10) including a temperature measurement sensor (9) and a Peltier element (8), and illuminates the reaction vessel from below. By providing a phase difference capacitor or the like between the light source and the reaction vessel, a contrast image in the reaction vessel can be obtained.
- the support portion is connected to the vibration device and can vibrate.
- the main body (12) includes a vibration device, a reagent tank, a processor for evaluating the dissociation state from the particle size distribution and controlling each element, and a power supply unit.
- An input / output interface (6) is installed on the front of the main body. ing.
- the system performs initialization processing (K000) and normal operation of each element.
- Initialization processing K000
- the system checks the initial state of the system by checking initial measurement parameters such as proper operation, reaction vessel temperature, amount of liquid in reaction vessel and liquid level.
- the system checks the setting parameters based on the initial state (K001). For example, the temperature in the reaction unit is close to room temperature when using the system for the first time, and close to the previous set temperature when using the system intermittently, so the system can set the optimal temperature adjustment time. .
- the setting parameters can be set from parameters input from the input unit or parameters stored in advance.
- the system adjusts the cell dissociation reaction in the reaction vessel (K002).
- K002 ′ the temperature in the reaction vessel is adjusted to, for example, 37 ° C. using a temperature adjustment plate so that an enzyme reaction or the like is appropriately performed
- Adjustment of the amount of dissociator adjusts the dissociator concentration in the reaction vessel in order to advance dissociation of cell-cell bonds by enzymatic reaction (K002 ′′).
- the vibration adjustment the vibration time and amplitude of the vibration device are adjusted in order to adjust the dissociation speed (K002 '' '). These adjustments may be performed sequentially, simultaneously, or separately.
- reaction adjustment may operate independently of the cell dissociation process flow as a combination of various subroutines including the subroutine for temperature adjustment shown in FIG. That is, the reaction vessel in which the dissociation process is completed may be taken out and the next reaction vessel may be put in a state where the temperature of the support portion is always kept constant. Further, detailed values including time information may be set in the setting parameters. For example, it can be set in detail so that the vibration can be stopped only when information is acquired by the sensor unit, or the manner of vibration can be changed at regular intervals.
- the system After appropriately adjusting the reaction, acquires an image of the cells present in the reaction container (K003). At this time, the system can adjust, for example, the light source or focus the camera so as to obtain an optimum imaging condition. In addition, when it is difficult to detect the outline of the cell or when measuring the viability of the cell at the same time, the system injects a dye for cell staining from the addition nozzle into the reaction container, and stains the cells in the reaction container. You can also Thereafter, the system measures the size, volume, quantity, etc. of the cells from the acquired image and calculates the particle size distribution (K004).
- the system compares the measurement parameters including the particle size distribution and environmental information in the reaction vessel with the set parameters, analyzes the dissociation state and the state in the reaction part (K005), and dissociates the state (for example, average particle size, It is determined whether or not the average particle size change rate / rate over time, particle size distribution pattern, etc.) has reached a set value (K006).
- the dissociation process is stopped by adding a dissociation neutralizing agent into the reaction vessel from the addition nozzle or lowering the temperature of the temperature adjustment plate (K007), and the indicator is lit (K008). ) To inform the user of the completion of the dissociation process.
- the system determines whether the dissociation processing time has exceeded the set value (K010). If not, the system sets as necessary. The parameter is changed (K009), and the procedure after K001 is repeated. Conversely, when the dissociation processing time exceeds the set value, the system stops the dissociation processing in the same manner as K007 (K011) and notifies an error (K012).
- these series of processes may be performed simultaneously, may be performed in a different order, or some of them may be omitted.
- the measurement parameter and the setting parameter may be compared (K005) to adjust the dissociation agent amount (K002 ′′) and vibration adjustment (K002 ′ ′′).
- the reaction adjustment is performed by comparing the measurement parameter with the set parameter (K005). Therefore, it is possible to omit the next adjustment of the amount of dissociating agent (K002 ′′) and vibration adjustment (K002 ′ ′′).
- the dissociation process stop (K007 or K011) and indicator lighting (K008) or error display (K012) may be performed simultaneously, or the dissociation process stop may be performed after the indicator lighting or error display. Furthermore, in the above flow, when it is determined that the dissociation state has not reached the set value (K006), the system calculates the optimum parameter from the comparison result (K005) of the measurement parameter and the set parameter, and sets the set parameter. It may be changed (K009).
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Abstract
Description
このような外科治療の対象となる重症心不全には、進行した弁膜症や高度の心筋虚血に起因するもの、急性心筋梗塞やその合併症、急性心筋炎、虚血性心筋症(ICM)、拡張型心筋症(DCM)などによる慢性心不全やその急性憎悪など、多種多様の原因がある。
この中で、ICMやDCMによる高度の左室機能低下から心不全を来たしたものについては、心臓移植や人工心臓による置換型治療のみが有効な治療法とされてきた。しかしながら、これら重症心不全患者に対する置換型治療は、慢性的なドナー不足、継続的な免疫抑制の必要性、合併症の発症など解決すべき問題が多く、すべての重症心不全に対する普遍的な治療法とは言い難い。
重症心筋梗塞等においては、心筋細胞が機能不全に陥り、さらに線維芽細胞の増殖、間質の線維化が進行し心不全を呈するようになる。心不全の進行に伴い、心筋細胞は傷害されて細胞死に至るが、心筋細胞は殆ど細胞分裂をおこさないため、心筋細胞数は減少し心機能の低下もさらに進む。
このような重症心不全患者に対する心機能回復には細胞移植法が有用とされ、既に自己骨格筋芽細胞による臨床応用が開始されている。
本発明の目的は、シート状細胞培養物の品質管理の実施に適した細胞を調製するため、細胞培養物を構成する細胞の解離操作を、簡便・確実に行うことができるシステムを提供することである。
(1)シート状細胞培養物を個別の細胞に解離するためのシステムであって、(i)シート状細胞培養物を解離させる反応部、(ii)反応部内に存在する細胞の粒度分布に関係する情報を取得するセンサー部、(iii)センサー部により取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する解析部を含む、前記システム。
(2)シート状細胞培養物が、骨格筋芽細胞を含む、上記(1)に記載のシステム。
(3)反応部内での細胞の解離を調整する反応調整部を含む、上記(1)または(2)に記載のシステム。
(4)反応調整部が、環境調整部、化学作用調整部および機械作用調整部のうち少なくとも1つを含む、上記(3)に記載のシステム。
(6)シート状細胞培養物を個別の細胞に解離する方法であって、(i)シート状細胞培養物を解離処理に供する工程、(ii)解離処理を受けたシート状細胞培養物の細胞の粒度分布に関係する情報を取得する工程、(iii)取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する工程を含む、前記方法。
(7)シート状細胞培養物の解離状態を判断する方法であって、解離処理を受けたシート状細胞培養物における細胞の粒度分布に基づいて解離状態を判断し出力する工程を含む、前記方法。
(8)シート状細胞培養物が骨格筋芽細胞を含む、上記(6)または(7)に記載の方法。
(i)シート状細胞培養物を解離させる反応部
(ii)反応部内に存在する細胞の粒度分布に関係する情報を取得するセンサー部
(iii)センサー部により取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する解析部
を含む、システムに関する。
本システムは、反応部内での細胞の解離を調整する反応調整部を任意に含んでいてもよい。
本発明において解離処理の対象となるシート状細胞培養物は、培養容器などの培養基材に付着した状態であっても、培養基材から剥離された状態であってもよい。前者の場合には、シート状細胞培養物を培養装置から培養基材ごと本システムに組み込んでもよく、基材からの剥離と、細胞同士の解離とを同時に行なってもよい。後者の場合には、基材から剥離したシート状細胞培養物を入れた容器を本システムの反応容器として利用してもよいし、剥離したシート状培養物を容器から取出し、本システムの反応容器に移し替えてもよい。また、本発明における、シート状細胞培養物は、同一条件で作製された複数のシート状細胞培養物からなるシート状細胞培養物のロットを代表するものであってもよい。
反応容器は、シート状細胞培養物を収容し、解離処理を行ない、粒度分布関連情報を取得できるものであれば特に限定されず、市販の細胞用容器、例えば、シャーレ、チューブ、フラスコなどであっても、本発明のために特別に作製したものであってもよく、種々の材質、形状および寸法のものを含み得る。シート状細胞培養物の解離は、例えば、培地、生理食塩水、PBSなどの細胞の生存に適した媒体中で、細胞解離剤等を作用させて行うため、反応容器の材質は、これらの液体を通過させない性状、細胞解離剤等により劣化しないか、劣化しにくい性状、および/または細胞の状態に影響を与えない性状を有するものが好ましい。また、形状としては1または2以上の面、辺および/または頂点を有する多角体、錐体、球体、半球体、またはこれらの組合わせなどであってもよく、細胞の観察のための少なくとも1の平坦な面を有してもよい。寸法も特に限定されず、シート状細胞培養物の大きさや粒度分布関連情報の取得手法などに応じて適宜決定することができる。好ましい寸法としては、例えば、最大断面積が1~400cm2、4~225cm2、9~144cm2、16~100cm2、25~81cm2であるもの、または、断面の最大径が1~20cm、2~15cm、3~12cm、4~10cm、5~9cmであるものなどが挙げられる。反応容器は、複数回使用可能なものであってもディスポーザブルであってもよい。また、反応容器は、その少なくとも1部、例えばその上面が開放されていてもよく、さらに、開放部が、コンタミネーションの回避などのために、所望により蓋などで閉鎖できるようになっていてもよい。
反応部(反応容器および/または支持部)は、その全体または一部を、光透過性の材質で作製してもよい。少なくとも反応容器を光透過性の材質、特に透明の材質とした場合には、反応容器内のシート状細胞培養物の解離状態に関する光学的情報(例えば、画像、レーザー回折像など)を、反応容器の外部から、反応容器を開放せずに取得することができる。この場合、光学的情報の取得に必要な部分が光透過性であれば、それ以外の部分が遮光性であっても同様の効果が得られる。また、外部の光の影響を遮断するために、反応容器の周囲を遮光性の材料で覆ってもよい。
画像は、反応容器全体から取得してもよいし、反応容器の一部から取得してもよい。反応容器の一部から取得する場合、反応容器の1箇所から取得してもよいし、複数箇所、例えば、2、3、4、5、6、7、8、9、10箇所またはそれ以上から取得してもよい。また、サンプリングポートにて、反応容器の一部、または複数箇所からサンプリングをおこなってもよい。
回折・散乱像は、反応容器全体から取得してもよいし、反応容器の一部から取得してもよい。反応容器の一部から取得する場合、反応容器の1箇所から取得してもよいし、複数箇所、例えば、2、3、4、5、6、7、8、9、10箇所またはそれ以上から取得してもよい。また、サンプリングポートにて、反応容器の一部、または複数箇所からサンプリングをおこなってもよい。
センサー部はさらに反応部内の環境に関する情報を取得してもよく、例えば、反応部内の温度、湿度、圧力、照度、二酸化炭素濃度、酵素濃度、振動等の情報を計測することができる。
なお、これらの情報(粒度分布関連情報および反応部内環境関連情報を含む)はある特定の時点におけるものでも、一定間隔で得た複数の時点におけるものでも、リアルタイムに取得されたものでもよい。
化学作用調整部は、反応容器内の細胞の解離反応を化学的/生化学的作用により調整する部分である。化学作用調整部は、反応部内に添加する化学物質、例えばタンパク質分解酵素などの細胞解離剤、細胞解離中和剤、pH調整剤、色素などの量、濃度、添加する場所やタイミングを調整する手段(例えば、プロセッサ、薬品調製装置など)、前記化学物質を添加する手段(例えば、液体注入装置など)、反応容器内の液体を増量または排出する手段(例えば、液体注入装置、液体吸引装置など)などを備えていてもよい。化学作用調整部は、反応容器に細胞解離剤を添加し、解離処理を開始させるよう構成してもよい。また、化学作用調整部は、細胞解離剤が添加された反応容器に細胞解離中和剤、冷却された液体などを加え、解離処理を終了させるよう構成してもよい。さらに、化学作用調整部は、解離処理の進行が遅い場合に、反応容器内の細胞解離剤を増量するよう構成することもできる。
化学作用調整部はまた、細胞同士が平面的に重なり合うことを避けるために、反応容器内の液量を調整することができるように構成してもよい。反応容器内の液量は、例えば、液面検出センサーや重量センサー等で適宜測定することができる。液量を少なくすることで、細胞同士が平面的に重なり合う確率が低くなり、粒度分布を画像解析法やレーザー回折散乱法などで算出する場合に有利である。
このように、本発明のシステムを構成する各構成要素は、所定の目的を達成することができる範囲で様々な様式で配置することができ、必要に応じて組合わせたり、一体化することもできる。
いうまでもないが、同フロー図は本発明のシステムの作動様式の一態様を示すものにすぎず、同フロー図とは異なる作動様式が数多く存在することを理解すべきである。
(ii)解離処理を受けたシート状細胞培養物の細胞の粒度分布に関係する情報を取得する工程
(iii)取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する工程を含む、シート状細胞培養物を個別の細胞に解離する方法に関する。
本方法における、解離処理を受けたシート状細胞培養物の細胞の粒度分布に関係する情報の取得、粒度分布の算出、および、解離状態の判断は、細胞解離システムについて上記したとおりであり、同システムの少なくともセンサー部および解析部を介して行なってもよい。本法の一態様としては、上記で説明した、図2のフロー図が挙げられる。
(i)解離処理を受けたシート状細胞培養物における細胞の粒度分布に関係する情報を取得するセンサー部
(ii)センサー部により取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する解析部
を含むシステムに関する。
本システムにおけるセンサー部および解析部は、上述のシート状細胞培養物解離システムと基本的に同様である。本システムは、センサー部が、本システム外に存在する解離処理を受けたシート状細胞培養物における細胞の粒度分布に関係する情報を取得し、これをもとに解析部が粒度分布を算出して、解離状態を判断し出力する。したがって、本システムは、シート状細胞培養物解離システムが備える反応部および/または反応調整部を含まなくてもよい。本システムは、例えば、本システムとは別のインキュベーターやシェーカーなどで解離処理を受けているシート状細胞培養物における細胞の粒度分布に関係する情報、例えば画像などをセンサー部で取得して、細胞の解離状態を判断し、利用者などに、音声やインジケータの点灯などで知らせることができる。
一方、解離状態が設定値に達していないと判断した場合、システムは、解離処理時間が設定値を超過していないか判断し(K010)、超過していない場合には、必要に応じて設定パラメータを変更し(K009)、K001以降の手順を繰り返す。逆に解離処理時間が設定値を超過している場合には、システムはK007と同様に解離処理を停止し(K011)、エラーを通知する(K012)。
2 支持部
3 カメラ
4 添加ノズル
5 フード
6 入出力インターフェース
7 シート状細胞培養物
8 ペルチェ素子
9 温度測定センサー
10 温度調整プレート
11 光源
12 本体
Claims (8)
- シート状細胞培養物を個別の細胞に解離するためのシステムであって、
(i)シート状細胞培養物を解離させる反応部
(ii)反応部内に存在する細胞の粒度分布に関係する情報を取得するセンサー部
(iii)センサー部により取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する解析部
を含む、前記システム。 - シート状細胞培養物が、骨格筋芽細胞を含む、請求項1に記載のシステム。
- 反応部内での細胞の解離を調整する反応調整部を含む、請求項1または2に記載のシステム。
- 反応調整部が、環境調整部、化学作用調整部および機械作用調整部のうち少なくとも1つを含む、請求項3に記載のシステム。
- シート状細胞培養物を個別の細胞に解離する処理において、シート状細胞培養物の解離状態を判断するためのシステムであって、
(i)解離処理を受けたシート状細胞培養物における細胞の粒度分布に関係する情報を取得するセンサー部
(ii)センサー部により取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する解析部
を含む、前記システム。 - シート状細胞培養物を個別の細胞に解離する方法であって、
(i)シート状細胞培養物を解離処理に供する工程
(ii)解離処理を受けたシート状細胞培養物の細胞の粒度分布に関係する情報を取得する工程
(iii)取得された情報から細胞の粒度分布を算出し、解離状態を判断し出力する工程
を含む、前記方法。 - シート状細胞培養物の解離状態を判断する方法であって、解離処理を受けたシート状細胞培養物における細胞の粒度分布に基づいて解離状態を判断し出力する工程を含む、前記方法。
- シート状細胞培養物が、骨格筋芽細胞を含む、請求項6または7に記載の方法。
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