WO2019172428A1 - 粒子分離装置 - Google Patents
粒子分離装置 Download PDFInfo
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- WO2019172428A1 WO2019172428A1 PCT/JP2019/009373 JP2019009373W WO2019172428A1 WO 2019172428 A1 WO2019172428 A1 WO 2019172428A1 JP 2019009373 W JP2019009373 W JP 2019009373W WO 2019172428 A1 WO2019172428 A1 WO 2019172428A1
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- sample liquid
- buffer
- liquid
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- inlet
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- 238000000926 separation method Methods 0.000 title claims abstract description 58
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- 239000000872 buffer Substances 0.000 claims abstract description 74
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- 239000007924 injection Substances 0.000 claims abstract description 19
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- 239000007853 buffer solution Substances 0.000 claims description 57
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- 239000008280 blood Substances 0.000 claims description 21
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502746—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means for controlling flow resistance, e.g. flow controllers, baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502761—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip specially adapted for handling suspended solids or molecules independently from the bulk fluid flow, e.g. for trapping or sorting beads, for physically stretching molecules
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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
- C12M23/00—Constructional details, e.g. recesses, hinges
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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
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
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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
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
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- C—CHEMISTRY; METALLURGY
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/04—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus by injection or suction, e.g. using pipettes, syringes, needles
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- B01L2200/0652—Sorting or classification of particles or molecules
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
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- B01L2400/0478—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure pistons
Definitions
- the present invention relates to a particle separator for separating target particles from a liquid containing target particles.
- CTC circulating tumor cells
- the image processing type cell sorter is a camera for observing the flow in the cell sorter chip, an image recognition system for distinguishing and recognizing the types of cells in the image taken by the camera, and separating the distinguished cells. Since an essential component is a device that applies external force (voltage, etc.) to cells in order to transfer to a different flow path, there is a problem that it is an expensive and large-sized device that cannot be used easily. .
- FIG. 2 of Non-Patent Document 2 includes a syringe and a tube for injecting a sample liquid into a microchannel chip (substrate) designed based on the basic structure of the DLD method.
- a sample liquid injection system having a buffer liquid injection system having a syringe and a tube for injecting a buffer liquid and a tube is shown for experiments.
- Non-Patent Document 2 since the sample liquid injection system and the buffer liquid injection system are independent from each other, and each is provided with a syringe and a tube, the syringe and buffer into which the sample liquid is injected It is necessary to operate the syringe into which the liquid has been injected by the same amount at the same time (pushing the piston), and if it is performed alone, it is necessary to operate with both hands. If the operation is not performed, the flow rates of the sample liquid and the buffer liquid may be greatly different, and there is a possibility that appropriate separation cannot be performed.
- the present invention has been made in view of such a point, and an object thereof is to provide a particle separation apparatus that is easy to operate and can appropriately separate particles.
- a particle separator comprises: A particle separation device for separating target particles from a sample liquid containing target particles, A syringe having a barrel having a discharge port and a piston, and pushing the piston to push the gas in the barrel out of the discharge port; A sample liquid storage member having an inlet and an outlet and into which the sample liquid is injected; A buffer solution containing member having an inlet and a discharge port into which the buffer solution is injected; A first conduit connected to the outlet of the barrel; a second conduit that is bifurcated from the first conduit and connected to the inlet of the sample solution storage member; and the first conduit A branch pipe provided with a third pipe connected to the injection port of the buffer liquid containing member on the other side branched from the path into two branches; A first one-way valve for preventing backflow that is interposed in the middle of the first pipe line, and that the syringe side is opened at a positive pressure and closed at a negative pressure; A sample liquid introduction
- the pressure in the barrel of the syringe is pushed out by pressing the piston of the syringe, and the internal pressure of the branch pipe is increased.
- the pressure acts simultaneously on the sample solution containing member containing the sample solution and the buffer solution containing member containing the buffer solution, and the sample solution and the buffer solution are supplied to the corresponding inlets of the DLD microchannel chip.
- the particle separation apparatus which concerns on the 1st viewpoint of this invention has the 1st one-way valve for backflow prevention in the middle of the 1st pipe line, the piston of a syringe is pressed by hand and the 1st pipe line The syringe is not pushed back even if the hand is released from the piston after increasing the internal pressure on the downstream side (second pipe side, third pipe side) of the first one-way valve.
- the sample liquid may include non-target particles having a different size from the target particles.
- the particle separation apparatus according to the first aspect of the present invention can separate target particles even when the sample liquid contains non-target particles having a different size from the target particles.
- the sample liquid may be a liquid containing cells as the target particles.
- the sample solution may include circulating tumor cells in the blood as the target particles.
- the particle separation apparatus according to the first aspect of the present invention can be suitably used for separating cells such as circulating tumor cells in the blood.
- the second pipe can be attached to and detached from the inlet of the sample liquid storage member
- the third pipe can be attached to and detached from the inlet of the buffer liquid storage member It can be.
- the particle separation device is provided so as to penetrate inside and outside the wall portion on the syringe side of the first one-way valve of the first conduit, and the syringe side is at a positive pressure. It can further have a vent hole for inhaling outside air provided with a second one-way valve that is closed and opened at the time of negative pressure. By comprising in this way, it becomes possible to pull back the pressed piston and then press it again without removing the syringe from the particle separation device. Therefore, by pumping (pushing and pulling) the piston, the first pipe line It is possible to sequentially increase the internal pressure on the downstream side (second pipeline side, third pipeline side) of the first one-way valve.
- the particle separator comprises: A particle separation device for separating target particles from a sample liquid containing target particles, A pressure generating device that includes a chamber having a discharge port and a movable part, and moves the movable part by a certain amount to push a gas in the chamber from the discharge port by a certain amount; A sample liquid storage member having an inlet and an outlet and into which the sample liquid is injected; A buffer solution containing member having an inlet and a discharge port into which the buffer solution is injected; A first pipe connected to the discharge port of the chamber, a second pipe branched from the first pipe and bifurcated to the inlet of the sample liquid storage member; and the first pipe A branch pipe provided with a third pipe connected to the injection port of the buffer liquid containing member on the other side branched from the path into two branches; A first one-way valve for preventing backflow that is interposed in the middle of the first pipe line or in the discharge port of the chamber, and that the pressure
- a certain amount of gas in the chamber of the pressure generation device is pushed out by moving the movable portion of the pressure generation device by a certain amount.
- the internal pressure of the branch pipe is increased, and the pressure acts simultaneously on the sample liquid storage member in which the sample liquid is stored and the buffer liquid storage member in which the buffer liquid is stored, and the sample liquid and the buffer liquid are transferred to the DLD microchannel chip.
- the device can be simplified when driven by power other than human power such as electric power, and the sample solution and the buffer solution can be used without special consideration. Both can be made to flow at an appropriate flow rate, and an appropriate separation can be realized.
- the particle separation device since the particle separation device according to the second aspect of the present invention has the first one-way valve for preventing backflow in the middle of the first conduit or at the discharge port of the chamber, the movable portion of the pressure generator is fixed by a certain amount. After moving and increasing the internal pressure on the downstream side (second pipeline side, third pipeline side) from the first one-way valve, even if the movable part is stopped, the downstream side (second pipeline side) Since it is easy to hold the internal pressure on the third pipe side), it is not necessary to provide a compressed air tank or the like for holding the pressure, and the apparatus can be simplified.
- the sample liquid may include non-target particles having a size different from that of the target particles.
- the particle separation apparatus according to the second aspect of the present invention can separate target particles even when the sample liquid contains non-target particles having a different size from the target particles.
- the sample liquid may be a liquid containing cells as the target particles.
- the sample solution may include circulating tumor cells in the blood as the target particles.
- the particle separation device according to the second aspect of the present invention can be suitably used for separation of cells such as circulating tumor cells in the blood.
- the second pipe can be attached to and detached from the inlet of the sample liquid storage member
- the third pipe can be attached to and detached from the inlet of the buffer liquid storage member It can be.
- the particle separation device is provided so as to penetrate into the wall portion on the pressure generating device side or the wall portion of the chamber from the first one-way valve of the first conduit.
- the pressure generating device may further include a vent hole for inhaling outside air including a second one-way valve that closes when positive pressure is applied and opens when negative pressure is applied.
- the downstream side of the first one-way valve of the first pipe (the second pipe side)
- the internal pressure on the third conduit side) can be increased sequentially. Therefore, even if a chamber having a small volume is used as the pressure generator, a large amount of sample liquid and buffer solution can be smoothly supplied to the DLD microchannel chip, and the pressure generator having a large volume chamber can be supplied. It is possible to appropriately prevent an increase in size and cost of the device accompanying use.
- FIG. 1 is a front view schematically showing an outline of the overall configuration of a CTC separation device according to an embodiment of the present invention.
- FIG. 2 is a plan view showing a schematic configuration of a DLD microchannel chip of the CTC separation device of FIG.
- FIG. 3 is a diagram showing the principle of particle separation of the DLD microchannel chip shown in FIG.
- FIG. 4 is a front view schematically showing the outline of the overall configuration of a CTC separation device according to another embodiment of the present invention.
- a CTC separation device that separates blood circulating tumor cells from the sample liquid using a blood-derived liquid containing blood circulating tumor cells (CTC) as target particles as non-target particles, with reference to the drawings. To do.
- the present invention is not limited to separating blood circulating tumor cells, but a body fluid (blood) containing cells other than blood circulating tumor cells as target particles and cells different in size from the target particles as non-target particles. It is applicable to those for separating cells related to target particles from lymph fluid, saliva, urine, tears, etc.).
- the target particles and the non-target particles are not limited to cells, and can be widely applied to particles that separate target particles from a liquid in which two or more kinds of particles having different sizes are dispersed.
- the term “dispersed” as used herein includes not only the case where particles (cells) are suspended alone in the liquid, but also a case where part or all of them are suspended as clusters, This includes not only the case where it is scattered and floating in the liquid but also the case where it is settled to some extent.
- the target particle size and non-target particle size are about 0.1 to 1000 ⁇ m.
- the sample liquid only needs to contain target particles to be separated, and non-target particles having a different size from the target particles need not necessarily be contained.
- exchange of a buffer solution containing a single size particle or a plurality of types of particles having a particle size equal to or larger than a predetermined size (the buffer solution containing particles is used as a sample solution, and the sample solution has a different or identical component to the sample solution.
- the present invention can also be applied to the case where the particles are transferred to a buffer solution) or the concentration of the particles is concentrated.
- target particle means a particle to be separated, which means not only a particle to be separated and recovered for use (eg, inspection), but also a particle to be separated (removed) because it is unnecessary. The meaning is also included.
- a CTC separation device 1 includes a syringe 2 as a pressure generating unit, a pressure distribution unit (branch pipe) 3, a sample solution storage unit (sample solution storage member) 4, and a buffer solution storage.
- a part (buffer liquid storage member) 5, a separation part (DLD microchannel chip) 6, a sample liquid recovery part 7, and a buffer liquid recovery part 8 are schematically provided.
- the syringe 2 is a piston syringe including a barrel (outer cylinder) 21 having a discharge port 21 a and a piston 22, and the gas (air) in the barrel 21 is discharged by pressing the piston 22 (sliding in the pushing direction). The gas is sucked out from the discharge port 21a by being pushed out (discharged) from 21a and sliding in the pulling direction.
- the pressure distribution unit 3 distributes the pressure generated by the syringe 2, and the first distribution line 31 connected to the discharge port 21 a of the barrel 21 of the syringe 2, and the one branched from the first line 31.
- the second pipe 32 connected to the inlet 41a of the barrel 41 of the sample liquid storage section 4 to be described later and the other branched from the first pipe 31 to the buffer liquid storage section 5 to be described later.
- a third pipe 33 connected to the inlet 51a of the barrel 51 is provided.
- the first conduit 31 includes a one-way valve (first one-way valve) 31a, a one-way valve (second one-way valve) 31b, a T-shaped tube connector 31c, a three-way cock 31d, and a tube 31e. Yes.
- a one-way valve 31 a is interposed in the middle of the first pipe 31, and the one-way valve 31 a has an upstream side (syringe 2 side) on the downstream side (second pipe line 32 side, third pipe line 33. Compared to the side), the backflow prevention valve is provided so as to open at the positive pressure and to close at the negative pressure.
- a diaphragm type check valve can be used as the one-way valve 31a.
- a vent for sucking outside air is provided on the syringe 2 side of the one-way valve 31a of the first pipe line 31.
- the one-way valve (second one-way valve) provided so as to penetrate the wall portion of the first pipe line 31 inward and outward, and the syringe 2 side is closed at the positive pressure and opened at the negative pressure. 31b.
- a diaphragm type check valve can be used similarly to the one-way valve 31a.
- the vent is provided with a T-type tube connector 31c having first to third connection ports interposed in the middle of the first conduit 31, that is, the first connection port of the T-type tube connector 31c is a syringe.
- connection port 2 is connected to the exhaust port 21a of the barrel 21, the second connection port is connected to one connection port of the one-way valve 31a, the third connection port is connected to one connection port of the one-way valve 31b, This is realized by opening the other connection port of the valve 31b to the outside.
- a three-way stopcock provided with first to third connection ports and a flow path changing lever on the downstream side of the one-way valve 31a of the first pipe line 31 (on the side of the sample liquid container 4 and the buffer liquid container 5). 31d is interposed. More specifically, the first connection port of the three-way stopcock 31d is connected to the connection port on the downstream side of the one-way valve 31a, the tube 31e is connected to the second connection port, and the third connection port is opened to the outside. Yes.
- the three-way stopcock 31d opens its path only from the first connection port to the second connection port and opens only the route from the first connection port to the third connection port by rotating its lever in a predetermined direction. Alternatively, only the path from the second connection port to the third connection port can be opened.
- the second conduit 32 includes a tube 32a and an adapter 32b attached to one end of the tube 32a.
- the adapter 32b of the second conduit 32 is detachably attached to the inlet 41a of the barrel 41 of the sample liquid storage unit 4 described later.
- the third conduit 33 is composed of a tube 33a and an adapter 33b attached to one end of the tube 33a.
- the adapter 33b of the third conduit 33 is detachably attached to an inlet 51a of the barrel 51 of the buffer liquid storage unit 5 described later.
- the downstream end (the opposite side to the three-way cock 31d) of the tube 31e of the first conduit 31 is connected to the first connection port of the Y-type tube connector 34 having the first to third connection ports.
- the upstream end (the opposite side of the adapter 32b) of the tube 32a of the second conduit 32 is connected to the second connection port of the Y-type tube connector 34, and the upstream of the tube 33a of the third conduit 33.
- the end (on the side opposite to the adapter 33 b) is connected to the third connection port of the Y-type tube connector 34.
- the sample liquid storage unit 4 includes a barrel (a member corresponding to an outer cylinder of a syringe) 41, and the barrel 41 has an inlet 41a and an outlet 41b.
- the barrel 41 accommodates a sample liquid (blood) S containing target particles (blood circulating tumor cells) and non-target particles (blood cells) having a size different from that of the target particles.
- a solution obtained by diluting blood for example, a solution obtained by diluting blood twice with PBS containing EDTA having a concentration of 4 mM
- PBS containing EDTA having a concentration of 4 mM
- the barrel 41 is supported by a stand or the like (not shown) in a state where the longitudinal direction (axial direction) is set to be substantially vertical so that the inlet 41a is located above and the outlet 41b is located below.
- the sample liquid S is injected with the adapter 32b of the second conduit 32 removed from the inlet 41a of the barrel 41. After the injection, the adapter 32b of the second conduit 32 is airtightly attached to the inlet 41a of the barrel 41.
- the sample liquid S accommodated in the barrel 41 is discharged from the discharge port 41b when pressure is applied via the second conduit 32.
- the buffer solution storage unit 5 includes a barrel (a member corresponding to an outer cylinder of a syringe) 51, and the barrel 51 has an inlet 51a and an outlet 51b.
- the buffer solution B is accommodated.
- the buffer solution B one or a mixture of isotonic solutions can be used.
- PBS or PBS containing glycerin can be used.
- the barrel 51 has a longitudinal direction (axial direction) set substantially vertical so that the injection port 51a is positioned upward and the discharge port 51b is positioned downward. It is supported by.
- the buffer solution B is injected, for example, in the same amount as the sample solution S with the adapter 33b of the third conduit 33 removed from the inlet 51a of the barrel 51, and after injection, the third conduit is supplied to the inlet 51a of the barrel 51.
- 33 adapters 33b are attached in an airtight manner.
- the buffer solution B accommodated in the barrel 51 is discharged from the discharge port 51b when pressure is applied via the third conduit 33.
- the separation unit 6 includes a DLD microchannel chip 61 and a chip holder (not shown) for preventing leakage.
- the DLD microchannel chip 61 includes a sample liquid inlet 61a, a buffer liquid inlet 61b, a DLD channel 61c, a sample liquid outlet 61d, and a buffer liquid outlet 61e. It is prepared for.
- the discharge port 41b of the barrel 41 of the sample solution storage unit 4 is connected to the sample solution introduction port 61a via a tube 41c.
- a discharge port 51b of the barrel 51 of the buffer solution storage unit 5 is connected to the buffer solution introduction port 61b through a tube 51c.
- the DLD channel portion 61c has a DLD microchannel structure in which a plurality of fine pillars are arranged.
- the DLD channel 61c and the channel from the outlet 41b of the barrel 41 of the sample liquid storage unit 4 to the DLD channel 61c (the outlet 41b, the tube 41c, the sample liquid inlet 61a, the DLD flow And a flow path from the discharge port 51b of the barrel 51 of the buffer liquid storage unit 5 to the DLD flow path unit 61c (the discharge port 51b, the tube 51c, and the buffer liquid introduction port 61b).
- the DLD flow path 61c is preferably filled with a buffer solution (such as PBS or glycerin-containing PBS) in advance.
- the sample liquid S in the barrel 41 of the sample liquid storage part 4 is passed through the discharge port 41 b, the tube 41 c and the sample liquid introduction port 61 a in the DLD flow path part.
- the buffer solution B in the barrel 51 of the buffer solution storage unit 5 is introduced into the DLD flow channel 61c through the discharge port 51b, the tube 51c, and the buffer solution introduction port 61b.
- the sample liquid introduced via the sample liquid inlet 61a and the buffer liquid introduced via the buffer liquid inlet 61b flow in the DLD flow path 61c in parallel as laminar flows while being in contact with each other.
- the DLD flow path 61c has a plurality of fine pillars (micro pillars) arranged according to the principle of the deterministic lateral replacement (DLD) method as described in Non-Patent Document 1, for example. .
- the deterministic lateral replacement method means that when a dispersion liquid of particles flows through a pillar group composed of a plurality of pillars P arranged according to a predetermined rule, This is a separation method that takes advantage of the property that large particles travel obliquely with respect to the direction of the flow as a result of the presence of the pillars preventing the particles from traveling along the direction of the flow.
- a threshold value determined by the interval G of the pillars P and the shift amount d particles having a diameter smaller than the threshold value and particles having a diameter larger than the threshold value can be separated. .
- the CTC having a relatively large diameter (for example, about 12 ⁇ m) contained in the sample liquid proceeds obliquely with respect to the flow direction of the sample liquid, and in parallel as a laminar flow while in contact with the sample liquid.
- the buffer solution containing the CTC that has moved to the flowing buffer solution B and moved from the sample solution to the buffer solution reaches the buffer solution outlet 61e.
- blood cells having a relatively small diameter (for example, about 8 ⁇ m) contained in the sample liquid proceed along the flow direction of the sample liquid, and the sample liquid after the CTC has moved (separated). At the same time, it reaches the sample liquid outlet 61d.
- the sample liquid and the buffer liquid are slightly mixed with each other when they flow in parallel as a laminar flow while being in contact with each other. Therefore, the sample liquid discharged from the sample liquid discharge port 61d In some cases, a part of the buffer liquid is included, and the buffer liquid discharged from the buffer liquid discharge port 61e may include a part of the sample liquid.
- a sample solution recovery container 72 is connected to the sample solution discharge port 61d via a tube 71 of the sample solution recovery unit 7, and the sample solution after the CTC is separated is recovered in the sample solution recovery container 72.
- a buffer liquid recovery container 82 is connected to the buffer liquid discharge port 61e via a tube 81 of the buffer liquid recovery section 8, and the buffer liquid containing CTC moved (separated) from the sample liquid is stored in the buffer liquid recovery container. 82 is collected.
- the air in the barrel 21 of the syringe 2 is pushed out by pressing the piston 22 of the syringe 2, and the pressure distributor 3 (first pipe 31, second pipe).
- the internal pressure of the channel 32 and the third conduit 33) is increased, and the pressure is applied to the barrel 41 of the sample solution storage unit 4 in which the sample solution S is stored and the barrel 51 of the buffer solution storage unit 5 in which the buffer solution B is stored.
- the sample solution S and the buffer solution B are pumped to the corresponding inlets 61 a and 61 b of the DLD microchannel chip 61 of the separation unit 6.
- the syringe 2 since the syringe 2 is single, the syringe 2 can be operated with one hand, so that the operation is simple, and both the sample liquid S and the buffer liquid B can be used at the same flow rate without special care. It is possible to appropriately flow to the DLD microchannel chip 61, and it is possible to realize appropriate separation.
- the piston 22 of the syringe 2 is provided. It is possible to prevent the air pushed out by pushing the air from flowing backward. Therefore, after the piston 22 of the syringe 2 is manually pressed to increase the internal pressure on the downstream side (the second conduit 32 side, the third conduit 33 side) of the one-way valve 31a of the first conduit 31, The hand can be released from 22 as required, and an operation for supplying pressure is easy.
- the syringe 2 is provided on the syringe 2 side of the first conduit 31 with the T-shaped tube connector 31c and the one-way valve 31b. Since the vent hole is provided, the piston 22 once pressed can be pulled back and pressed again with the syringe 2 connected to the T-shaped tube connector 31c in cooperation with the one-way valve 31a. Yes. Therefore, by pumping the syringe 2 (pushing and pulling the piston 22), the internal pressure on the downstream side of the one-way valve 31a of the first conduit 31 can be sequentially increased.
- the second conduit 32 in order to inject the sample liquid into the barrel 41 of the sample liquid storage unit 4, can be attached to and detached from the injection port 41 a of the barrel 41, and the buffer liquid is stored in the barrel of the buffer liquid storage unit 5.
- the third pipe line 33 is made detachable to the injection port 51a of the barrel 51.
- these are not made detachable or detachable, and these are injected by other means. You may make it obtain.
- a three-way stopcock is interposed in the middle of each of the second conduit 32 and the third conduit 33, and the route of the three-way stopcock is appropriately switched to inject the sample solution or buffer solution into the corresponding barrels 41 and 51. You may make it do.
- the barrel 21 of the syringe 2 is drawn so as to be installed in a substantially vertical direction, similarly to the barrel 41 of the sample solution storage unit 4 and the barrel 51 of the buffer solution storage unit 5.
- the present invention is not limited to this, and a part or all of the first pipeline 31, the second pipeline 32, and the third pipeline 33 are made of a flexible material, and the flexible portion is bent.
- the syringe 2 side may hang down due to gravity.
- the syringe 2 is used as a pressure generating device serving as a pressure generating source for flowing the sample solution and the buffer solution to the DLD microchannel chip 61.
- the syringe 2 includes a chamber having a discharge port and a movable portion. As long as the gas in the chamber is pushed out from the discharge port by moving the movable part by a certain amount, other pressure generators may be used and driven by power other than human power such as electric power. A pressure generator may be used.
- pressure generating devices include an electric rotary pump having a rotor as a movable part, an electric diaphragm pump having a diaphragm as a movable part, an electric plunger pump having a plunger as a movable part, and an electric motor having a piston as a movable part.
- a pressure generator including a chamber and a movable part employed in an electric pump such as a piston pump can be exemplified, but the invention is not limited thereto.
- the syringe 2 in embodiment mentioned above is a pressure generator which has the barrel 21 as a chamber, and has the piston 22 as a movable part which changes the pressure inside the chamber (barrel 21).
- the one-way valve for preventing backflow is the same as the one-way valve 31 a of the embodiment using the syringe 2 described above. Although it may be provided in the middle, using a pressure generating device in which a one-way valve for preventing a backflow is interposed in advance in a discharge port of the chamber (a route from the chamber to the first conduit 31 in the pressure generating device).
- the one-way valve may be used as the first one-way valve.
- the movable part of the pressure generating device is moved by a certain amount, and is located downstream of the first one-way valve (the second pipeline side and the third pipeline side). After increasing the internal pressure, it becomes easier to maintain the internal pressure on the downstream side (second pipeline side, third pipeline side) than the first one-way valve even if the movable part is stopped, and as a result, compressed air for maintaining the pressure Since there is no need to provide a tank or the like, the apparatus can be simplified.
- the vent for intake of outside air including the second one-way valve may be provided in the wall portion of the first pipe line 31 in the same manner as the one-way valve 31b of the embodiment using the syringe 2 described above.
- the one-way valve is used as a second one-way valve. May be.
- the operation of generating a positive pressure can be performed again on the movable part after performing the operation (that is, the operation of generating the negative pressure), the operation of generating the positive pressure is repeated, so 1
- the internal pressure on the downstream side (the second pipeline side, the third pipeline side) relative to the one-way valve can be successively increased. Therefore, even if a chamber having a small volume is used as the pressure generator, a large amount of sample liquid and buffer solution can be smoothly supplied to the DLD microchannel chip, and the pressure generator having a large volume chamber can be supplied. It is possible to appropriately prevent an increase in size and cost of the device accompanying use.
- the space on the discharge port side in the chamber and the space on the ventilation port side for inhaling outside air in the chamber are partitioned by a vane or the like from the ventilation port for outside air suction to the chamber. Since the internal gas can be prevented from being discharged, a vent hole for sucking outside air can be provided without the second one-way valve.
- FIG. 4 shows a CTC separation device having an electric rotary pump 9 as a pressure generating device as another embodiment of the present invention.
- a one-way valve (not shown) for preventing backflow is interposed at the discharge port of the electric rotary pump 9 (path from the chamber in the electric rotary pump 9 to the first pipe line). ing.
- tube 5 buffer solution storage part (buffer solution storage member) 51 ... barrel 51a ... inlet 51b ... outlet 51c ... tube 6 ... separation part 61 ... DLD microchannel chip 61a ... sample liquid inlet 61b ... buffer liquid inlet 61c ... DLD channel 61d ... sample liquid outlet 61e ... Buffer solution outlet 7 ... Sample solution recovery part 71 ... Tube 72 ... Sample solution recovery container 8 ... Buffer solution recovery part 81 ... Tube 82 ... Buffer solution recovery container 9 ... Electric rotary pump (pressure generator) B ... Buffer solution P ... Pillar S ... Sample solution
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Abstract
Description
標的粒子を含むサンプル液から該標的粒子を分離する粒子分離装置であって、
排出口を有するバレルおよびピストンを備え、該ピストンを押圧することにより、該バレル内の気体を該排出口から押し出すシリンジと、
注入口および排出口を有し、前記サンプル液が注入されるサンプル液収容部材と、
注入口および排出口を有し、バッファ液が注入されるバッファ液収容部材と、
前記バレルの排出口に接続された第1管路、該第1管路から二股に分岐した一方であって前記サンプル液収容部材の注入口に接続される第2管路、および該第1管路から二股に分岐した他方であって前記バッファ液収容部材の注入口に接続される第3管路を備える分岐管と、
前記第1管路の途中に介装され、前記シリンジ側が陽圧時に開放し陰圧時に閉塞する逆流防止用の第1一方向弁と、
前記サンプル液収容部材の排出口に接続されるサンプル液導入口、前記バッファ液収容部材の排出口に接続されるバッファ液導入口、前記ピストンを押圧することにより、該サンプル液導入口を介して導入されたサンプル液と該バッファ液導入口を介して導入されたバッファ液とが接しながら並行して流れる複数の微細なピラーが配設されたDLDマイクロ流路構造を備えるDLD流路部、該DLD流路部でサンプル液からバッファ液に移動した標的粒子を含むバッファ液を排出するバッファ液排出口、および該DLD流路部で標的粒子がバッファ液に移動した後のサンプル液を排出するサンプル液排出口を備えるDLDマイクロ流路チップと、を有する。
標的粒子を含むサンプル液から該標的粒子を分離する粒子分離装置であって、
排出口を有するチャンバーおよび可動部を備え、該可動部を一定量動かすことにより、該チャンバー内の気体を該排出口から一定量押し出す圧力発生装置と、
注入口および排出口を有し、前記サンプル液が注入されるサンプル液収容部材と、
注入口および排出口を有し、バッファ液が注入されるバッファ液収容部材と、
前記チャンバーの排出口に接続された第1管路、該第1管路から二股に分岐した一方であって前記サンプル液収容部材の注入口に接続される第2管路、および該第1管路から二股に分岐した他方であって前記バッファ液収容部材の注入口に接続される第3管路を備える分岐管と、
前記第1管路の途中または前記チャンバーの排出口に介装され、前記圧力発生部側が陽圧時に開放し陰圧時に閉塞する逆流防止用の第1一方向弁と、
前記サンプル液収容部材の排出口に接続されるサンプル液導入口、前記バッファ液収容部材の排出口に接続されるバッファ液導入口、前記圧力発生装置が前記サンプル液収容部の内部および前記バッファ液収容部の内部を昇圧することにより、該サンプル液導入口を介して導入されたサンプル液と該バッファ液導入口を介して導入されたバッファ液とが接しながら並行して流れる複数の微細なピラーが配設されたDLDマイクロ流路構造を備えるDLD流路部、該DLD流路部でサンプル液からバッファ液に移動した標的粒子を含むバッファ液を排出するバッファ液排出口、および該DLD流路部で標的粒子がバッファ液に移動した後のサンプル液を排出するサンプル液排出口を備えるDLDマイクロ流路チップと、を有する。
2…シリンジ(圧力発生装置)
21…バレル(チャンバー)
21a…排出口
22…ピストン(可動部)
3…圧力分配部(分岐管)
31…第1管路
31a…一方向弁(第1一方向弁)
31b…一方向弁(第2一方向弁、通気口)
31c…T型チューブコネクタ(通気口)
31d…三方活栓
32…第2管路
32a…チューブ
32b…アダプタ
33…第3管路
33a…チューブ
33b…アダプタ
34…Y型チューブコネクタ
4…サンプル液収容部(サンプル液収容部材)
41…バレル
41a…注入口
41b…排出口
41c…チューブ
5…バッファ液収容部(バッファ液収容部材)
51…バレル
51a…注入口
51b…排出口
51c…チューブ
6…分離部
61…DLDマイクロ流路チップ
61a…サンプル液導入口
61b…バッファ液導入口
61c…DLD流路部
61d…サンプル液排出口
61e…バッファ液排出口
7…サンプル液回収部
71…チューブ
72…サンプル液回収容器
8…バッファ液回収部
81…チューブ
82…バッファ液回収容器
9…電動ロータリーポンプ(圧力発生装置)
B…バッファ液
P…ピラー
S…サンプル液
Claims (12)
- 標的粒子を含むサンプル液から該標的粒子を分離する粒子分離装置であって、
排出口を有するバレルおよびピストンを備え、該ピストンを押圧することにより、該バレル内の気体を該排出口から押し出すシリンジと、
注入口および排出口を有し、前記サンプル液が注入されるサンプル液収容部材と、
注入口および排出口を有し、バッファ液が注入されるバッファ液収容部材と、
前記バレルの排出口に接続された第1管路、該第1管路から二股に分岐した一方であって前記サンプル液収容部材の注入口に接続される第2管路、および該第1管路から二股に分岐した他方であって前記バッファ液収容部材の注入口に接続される第3管路を備える分岐管と、
前記第1管路の途中に介装され、前記シリンジ側が陽圧時に開放し陰圧時に閉塞する逆流防止用の第1一方向弁と、
前記サンプル液収容部材の排出口に接続されるサンプル液導入口、前記バッファ液収容部材の排出口に接続されるバッファ液導入口、前記ピストンを押圧することにより、該サンプル液導入口を介して導入されたサンプル液と該バッファ液導入口を介して導入されたバッファ液とが接しながら並行して流れる複数の微細なピラーが配設されたDLDマイクロ流路構造を備えるDLD流路部、該DLD流路部でサンプル液からバッファ液に移動した標的粒子を含むバッファ液を排出するバッファ液排出口、および該DLD流路部で標的粒子がバッファ液に移動した後のサンプル液を排出するサンプル液排出口を備えるDLDマイクロ流路チップと、を有する粒子分離装置。 - 前記サンプル液は、前記標的粒子とサイズの異なる非標的粒子を含む請求項1に記載の粒子分離装置。
- 前記標的粒子は、細胞である請求項1または2に記載の粒子分離装置。
- 前記サンプル液は、血中循環腫瘍細胞を前記標的粒子として含む請求項3に記載の粒子分離装置。
- 前記第2管路は前記サンプル液収容部材の注入口に着脱可能であり、前記第3管路は前記バッファ液収容部材の注入口に着脱可能である請求項1~4のいずれかに記載の粒子分離装置。
- 前記第1管路の前記第1一方向弁よりも前記シリンジ側の壁部に内外に貫通するように設けられ、前記シリンジ側が陽圧時に閉塞し陰圧時に開放する第2一方向弁を備える外気吸入用の通気口をさらに有する請求項1~5のいずれかに記載の粒子分離装置。
- 標的粒子を含むサンプル液から該標的粒子を分離する粒子分離装置であって、
排出口を有するチャンバーおよび可動部を備え、該可動部を一定量動かすことにより、該チャンバー内の気体を該排出口から一定量押し出す圧力発生装置と、
注入口および排出口を有し、前記サンプル液が注入されるサンプル液収容部材と、
注入口および排出口を有し、バッファ液が注入されるバッファ液収容部材と、
前記チャンバーの排出口に接続された第1管路、該第1管路から二股に分岐した一方であって前記サンプル液収容部材の注入口に接続される第2管路、および該第1管路から二股に分岐した他方であって前記バッファ液収容部材の注入口に接続される第3管路を備える分岐管と、
前記第1管路の途中または前記チャンバーの排出口に介装され、前記圧力発生部側が陽圧時に開放し陰圧時に閉塞する逆流防止用の第1一方向弁と、
前記サンプル液収容部材の排出口に接続されるサンプル液導入口、前記バッファ液収容部材の排出口に接続されるバッファ液導入口、前記圧力発生装置が前記サンプル液収容部の内部および前記バッファ液収容部の内部を昇圧することにより、該サンプル液導入口を介して導入されたサンプル液と該バッファ液導入口を介して導入されたバッファ液とが接しながら並行して流れる複数の微細なピラーが配設されたDLDマイクロ流路構造を備えるDLD流路部、該DLD流路部でサンプル液からバッファ液に移動した標的粒子を含むバッファ液を排出するバッファ液排出口、および該DLD流路部で標的粒子がバッファ液に移動した後のサンプル液を排出するサンプル液排出口を備えるDLDマイクロ流路チップと、を有する粒子分離装置。 - 前記サンプル液は、前記標的粒子とサイズの異なる非標的粒子を含む請求項7に記載の粒子分離装置。
- 前記標的粒子は、細胞である請求項7または8に記載の粒子分離装置。
- 前記サンプル液は、血中循環腫瘍細胞を前記標的粒子として含む請求項9に記載の粒子分離装置。
- 前記第2管路は前記サンプル液収容部材の注入口に着脱可能であり、前記第3管路は前記バッファ液収容部材の注入口に着脱可能である請求項7~10のいずれかに記載の粒子分離装置。
- 前記第1管路の前記第1一方向弁よりも前記圧力発生装置側の壁部または前記チャンバーの壁部に内外に貫通するように設けられ、前記圧力発生装置側が陽圧時に閉塞し陰圧時に開放する第2一方向弁を備える外気吸入用の通気口をさらに有する請求項7~11のいずれかに記載の粒子分離装置。
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Cited By (2)
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JP7469755B2 (ja) | 2020-01-17 | 2024-04-17 | 富山県 | 加圧装置 |
JP7482449B2 (ja) | 2020-01-17 | 2024-05-14 | 富山県 | 粒子分離装置 |
Also Published As
Publication number | Publication date |
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KR20200129106A (ko) | 2020-11-17 |
US20210039103A1 (en) | 2021-02-11 |
JP7412688B2 (ja) | 2024-01-15 |
CN111788294A (zh) | 2020-10-16 |
EP3763808A1 (en) | 2021-01-13 |
JPWO2019172428A1 (ja) | 2021-03-11 |
SG11202008618YA (en) | 2020-10-29 |
EP3763808A4 (en) | 2021-12-08 |
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