US20130084599A1 - Cell collection apparatus, cell collecting system, and cell collecting method - Google Patents

Cell collection apparatus, cell collecting system, and cell collecting method Download PDF

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Publication number
US20130084599A1
US20130084599A1 US13/686,296 US201213686296A US2013084599A1 US 20130084599 A1 US20130084599 A1 US 20130084599A1 US 201213686296 A US201213686296 A US 201213686296A US 2013084599 A1 US2013084599 A1 US 2013084599A1
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Prior art keywords
substrate
section
collection apparatus
small pieces
adhered
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US13/686,296
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Nobuhiko Morimoto
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Olympus Corp
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Olympus Corp
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Publication of US20130084599A1 publication Critical patent/US20130084599A1/en
Assigned to OLYMPUS CORPORATION reassignment OLYMPUS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MORIMOTO, NOBUHIKO
Priority to US14/011,917 priority Critical patent/US20140011233A1/en
Priority to US14/528,508 priority patent/US9304068B2/en
Abandoned legal-status Critical Current

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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
    • 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
    • G01N2001/2873—Cutting or cleaving

Definitions

  • the present invention relates to a cell collection apparatus, a cell collecting system, and a cell collecting method.
  • the Laser Microdissection (LMD) method has been known as a technique to pick up a micro-region of about several tens microns by cutting it out from a thin tissue section for use in pathological diagnosis and the like.
  • the micro-region of the tissue section to be picked up is irradiated with UV laser, by which the micro-region is cut out from the section.
  • the scale of the device structure has to be much enlarged and also the price of the device has to be raised.
  • the disadvantage is that it is necessary to increase the laser output after all so as to cut out the section by laser.
  • the present invention addresses the above-mentioned situation. It is an object of the present invention to provide a cell collection apparatus, a cell collecting system, and a cell collecting method, capable of picking up a sufficient amount of cells for a genetic test from a section of a biological tissue with a simple structure and a simple operation.
  • a first aspect of the present invention is a cell collection apparatus comprising: a substrate which is provided to be dividable into a plurality of small pieces along a predetermined dividing line, and which has a flat surface to which a section of a biological tissue can be pasted; a sheet-shaped expandable member to which the substrate can be adhered in a detachable manner, and which is expandable in a direction along the surface; a expansion unit for expanding the expandable member in at least a region adhered with the substrate, in a direction along the surface; and a pickup unit for detaching and picking up the divided small pieces from the expandable member.
  • the expandable member may have stickiness on its surface.
  • the substrate may comprise a plurality of separated small pieces adhered to the expandable member in mutually adjacent and aligned state.
  • the dividing line may be composed of a groove formed in the surface of the substrate.
  • the expandable member may comprise an optically transparent or semi-transparent material.
  • the small piece may be in a cuboid-shape having a thickness of 0.05 to 0.5 mm and side lengths of 0.05 to 5.0 mm.
  • the expansion unit may comprise: a fixing member for fixing a periphery of the region of the expandable member being adhered with the substrate, in a predetermined shape; and a pressing member for pressing the region of the expandable member being fixed by the fixing member, from a side of the surface opposite side to the surface adhered with the substrate.
  • the pickup unit may also comprise: a needle member for pushing a position of the expandable member being adhered with the small pieces, from the surface on the opposite side to the surface adhered with the small pieces.
  • the structure may also comprise: a holding member for holding the region of the expandable member in a expanded state.
  • the holding member may be capable of holding the surface of the expandable member on the side adhered with the substrate to be faced downward.
  • the structure comprising the holding member may also comprise: a suction member which is provided to the side of the surface of the expandable member held by the holding member where the substrate is adhered, and the interior of which can be sucked to a negative pressure.
  • the small piece may be a magnetic particle having a diameter of 0.001 to 0.5 mm.
  • the pickup unit has a magnet which generates a magnetic force to attract the magnetic particle, in a space of an approximately same size as that of the dimension of the small piece.
  • a second aspect of the present invention is a cell collecting system comprising: a cell collection apparatus according to any one of the above-mentioned structure; and an observation device for observing the section on the substrate being adhered to the expandable member.
  • a third aspect of the present invention is a cell collecting method comprising: a pasting step for pasting a section of a biological tissue on a surface of a substrate that can be divided into a plurality of small pieces along a predetermined dividing line, while having the section bridged over the dividing line; a dividing step for dividing the substrate and the section of the biological tissue along the dividing line, by expanding the substrate pasted with the section in a direction along the surface; and a pickup step for picking up the small pieces of the section that has been divided in the dividing step.
  • FIG. 1 shows the overall structure of the cell collecting system according to one embodiment of the present invention.
  • FIG. 2A is a side view of the glass substrate adhered to the sticky sheet, showing a case where the grooves are faced to the sticky sheet side.
  • FIG. 2B is a side view of the glass substrate adhered to the sticky sheet, showing a case where the grooves are faced to the opposite side against the sticky sheet.
  • FIG. 3A shows the glass substrate adhered to the sticky sheet.
  • FIG. 3B shows the glass substrate divided by expanding the sticky sheet.
  • FIG. 4 shows the structure of the expanding stage and the jig.
  • FIG. 5A is a diagram explaining a method how to use the expanding stage and the jig of FIG. 4 , and showing a state where the sticky sheet has not been expanded yet.
  • FIG. 5B is a diagram explaining the method how to use the expanding stage and the jig of FIG. 4 , and showing a state where the sticky sheet has been expanded.
  • FIG. 5C is a diagram explaining the method how to use the expanding stage and the jig of FIG. 4 , and showing a state where the sticky sheet is held by the grip rings.
  • FIG. 6 is a flowchart explaining the procedure to pick up cells from the section with use of the cell collection apparatus and the cell collecting system of FIG. 1 .
  • FIG. 7 shows a modified example of the substrate.
  • FIG. 8 shows another modified example of the substrate.
  • FIG. 9 shows a modified example of the cell collecting system of FIG. 1 .
  • FIG. 10 shows another modified example of the cell collecting system of FIG. 1 .
  • FIG. 11 is a flowchart showing a modified example the procedure to pick up cells with use of the cell collecting system of FIG. 1 .
  • FIG. 12 is a diagram showing a modified example of the method to expand the sticky sheet with use of the outer cylinder and the inner cylinder, and showing a state where the sticky sheet is set on the outer cylinder.
  • FIG. 13 shows a state where the sticky sheet is being expanded by using the outer cylinder and the inner cylinder of FIG. 12 .
  • FIG. 14 shows a state where the sticky sheet is being expanded by another method using the outer cylinder and the inner cylinder of FIG. 12 .
  • FIG. 15A shows another modified example of the method to expand the sticky sheet before expanding the sticky sheet.
  • FIG. 15B shows the another modified example of the method to expand the sticky sheet after expanding the sticky sheet.
  • FIG. 16 shows a modified example of the grip rings.
  • FIG. 17 is a photograph of the section made by the Example of the present invention, showing a state before the section has been divided.
  • FIG. 18 is a photograph showing a state after the section of FIG. 17 has been divided.
  • FIG. 19 shows an example of an embodiment for detaching and picking up small pieces from the expanded sticky sheet.
  • FIG. 20A shows an example of an embodiment for detaching and picking up small pieces from the expanded sticky sheet by using a suction member.
  • FIG. 20B is an enlarged diagram showing the example of the embodiment for detaching and picking up a small piece from the expanded sticky sheet by using the suction member.
  • FIG. 21A shows an embodiment for picking up small pieces by a needle while tilting the expanded sticky sheet.
  • FIG. 21B shows an embodiment for picking up small pieces by a suction member while tilting the expanded sticky sheet.
  • the cell collecting system 100 of this embodiment comprises an optical microscope (observation device) 2 and the cell collection apparatus 1 of this embodiment.
  • the optical microscope 2 is of an erecting type.
  • the optical microscope 2 is configured such that an imaging device 3 like a CCD camera for taking an image of the field of view is connected to a camera port 2 a so that the image taken by the imaging device 3 can be displayed on a monitor (not shown).
  • the structure may also be such that the image taken by the imaging device 3 is subject to image processing with an image processing device (not shown) like an image processor and thereafter displayed on the monitor.
  • the cell collection apparatus 1 comprises: a glass substrate (substrate) 4 to which a section of a biological tissue can be pasted; a sticky sheet (expandable member) 5 to which the glass substrate 4 can be adhered, and which is expandable in directions along the surface; a expanding stage (expansion unit, pressing member) 6 for expanding the sticky sheet 5 ; a jig 7 for holding the sticky sheet 5 when the sheet 5 is being expanded by the expanding stage 6 ; and a pickup unit 8 for picking up small pieces 4 b of the glass substrate 4 from the sticky sheet 5 .
  • a sufficient amount of cells for a genetic test can be easily picked up only by picking up one or a several number of cells, by increasing the thickness of the section or enlarging the area of the small pieces in the planar direction so as to increase the amount of cells adhered to each small piece.
  • the glass substrate 4 is shaped like a plate having a flat surface. As shown in FIG. 2A and FIG. 3A , the surface of the glass substrate 4 is formed with grid-like grooves (dividing lines) 4 a with predetermined spacing.
  • the grooves 4 a can be formed by, for example, laser processing, chemical etching, dicing, or the like. It is also possible to form them by hand work of an operator using a glass cutter or the like.
  • the substrate can be easily divided along the position of the groove when the expandable member is expanded.
  • the glass substrate 4 has a thickness which enables to stably support a section of a biological tissue, for example, from 0.05 to 0.5 mm.
  • the spacing between the grooves 4 a can be modified appropriately according to the size of fragments to be picked up from the section, although it is preferably from 0.05 to 5.0 mm so that a sufficient amount of cells can be contained in the picked up fragments while the fragments of a desired region can be picked up from the section with adequately precise positional accuracy.
  • An optically transparent substrate is used for the glass substrate 4 , so that the transmitted beam image of the section pasted thereon can be observed with the optical microscope 2 .
  • the positions of the small pieces on the expandable member can be checked at the time when observing the transmitted beam image of the expandable member with the optical microscope.
  • the glass substrate 4 with silanization or such a chemical treatment on the surface so as to improve the adhesiveness between the surface and the section.
  • the sticky sheet 5 is coated with an adhesive agent to have a stickiness which enables the glass substrate 4 to be sufficiently and firmly adhered thereto, as well as enabling it to be detached therefrom by a pickup unit 8 that will be described later. By so doing, the substrate can be easily adhered onto the sticky sheet.
  • the sticky sheet 5 is expandable in directions along the surface.
  • the glass substrate 4 is also extended in the direction along the surface together with the expanding of the sticky sheet 5 , by which as shown in FIG. 3B the glass substrate 4 is cut along the positions of the grooves 4 a and divided into a plurality of small pieces 4 b .
  • the section A having being pasted on the surface of the glass substrate 4 is also extended in the direction along the surface, and thus cut along the grooves 4 b.
  • the sticky sheet 5 is optically permeable or semi-permeable, by which an object arranged on the opposite side to the object lens of the optical microscope 2 can be observed across the sticky sheet 5 , at the time when observing the sticky sheet 5 with the optical microscope 2 .
  • the sticky sheet 5 it is possible to suitably use a dicing tape for use in temporal fixation of a wafer during a dicing step in a semiconductor production process, for example.
  • FIG. 2A shows an example in which the glass substrate 4 is adhered to the sticky sheet 5 while the grooves 4 a are facing to the sticky sheet 5 side.
  • the structure may also be such that as shown in FIG. 2B the glass substrate 4 is adhered to the sticky sheet 5 while the grooves 4 a are facing to the opposite side against the sticky sheet 5 .
  • the expanding stage 6 is formed to have an approximately columnar shape with approximately parallel and flat opposite ends.
  • a step is formed on the lateral surface so that the upper end portion (hereunder, referred to as the small diameter portion) 6 a has a diameter smaller than that of the other portion (hereunder, referred to as the large diameter portion) 6 b.
  • the jig 7 has a bottom frame (fixing member) 9 a to which the sticky sheet 5 can be pasted in an extended state, a top frame 9 b for covering the bottom frame 9 a from the top, and grip rings 10 a and 10 b (holding member) for holding the sticky sheet 5 in a expanded state.
  • the expandable member can be expanded to be held in a state where the spacing between the respective small pieces is kept open. This makes it much easier to pick up the small pieces with the pickup unit.
  • the grip rings 10 a and 10 b consist of an outer ring 10 a and an inner ring 10 b .
  • the inner diameter of the outer ring 10 a and the outer diameter of the inner ring 10 b are formed to be approximately the same.
  • windows 9 c and 9 d passing through in the plate thickness direction are respectively formed.
  • the outer ring 10 a is fit inside the window 9 d of the top frame 9 b , along the inner circumferential surface thereof.
  • the window 9 c of the bottom frame 9 a has the same or larger diameter than the outer diameter of the small diameter portion 6 a.
  • the jig 7 is used in the following manner. Firstly, the inner ring 10 b is fit along the outer circumference of the small diameter portion 6 a . Then, the sticky sheet 5 adhered with the glass substrate 4 is adhered to the bottom surface of the bottom frame 9 a in a state where the glass substrate 4 is arranged in a position of the window 9 c and the surface on the side adhered with the glass substrate 4 is facing upward. By so doing, as shown in FIG. 5A , the periphery around the region adhered with the glass substrate 4 of the sticky sheet 5 is fixed in a predetermined shape.
  • the bottom frame 9 a is pressed to move downward in a state where a portion of the sticky sheet 5 corresponding to the window 9 c is being pressed against the top surface of the expanding stage 6 .
  • the portion of the sticky sheet 5 corresponding to the window 9 c is expanded by being pressed from the expanding stage 6 , and the glass substrate 4 is divided into a plurality of small pieces 4 b together with the expanding of the sticky sheet 5 .
  • the outer ring 10 a and the inner ring 10 b are fit to each other by covering the top frame 9 b over the bottom frame 9 a in a state where the sticky sheet 5 is being expanded.
  • the portion of the sticky sheet 5 corresponding to the window 9 c is held in a expanded state by the grip rings 10 a and 10 b.
  • the pickup unit 8 comprises a pickup needle 11 and a manipulator 12 for operating the pickup needle 11 .
  • the tip of the pickup needle 11 has a diameter approximately the same as or smaller than the size of each small piece 4 b .
  • the manipulator 12 holds the pickup needle 11 at the distal end of the arm 12 a .
  • the manipulator 12 is designed to move the arm 12 a in three dimensional directions by the operation of the operator.
  • the section for pick-up purpose (section) is cut out from the biological tissue (Step S 1 ); and the thus cut out section for pick-up purpose is pasted on the glass substrate 4 (Step S 2 , Pasting Step). Then, the analyte section image is acquired by observing the section for pick-up purpose with the optical microscope 2 (Step S 3 ).
  • the section for pick-up purpose is cut out by, for example, freeze sectioning or paraffin sectioning.
  • the thickness of the section for pick-up purpose may be thicker than the thickness of a usual section for use as a pathological sample or the like (about several to ten micrometers), although it depends on the purpose of the application of the picked up cells.
  • the section for pick-up purpose can be cut out to have a thickness of about 50 ⁇ m. If the size of the thus cut out section for pick-up purpose is smaller than the spacing between the grooves 4 a of the glass substrate 4 , the section for pick-up purpose is pasted on the glass substrate 4 so that the section for pick-up purpose can be bridged over the groove 4 a.
  • a section for staining purpose is cut to have a thickness of about several to ten micrometers from the place adjacent to the place where the section for pick-up purpose of the biological tissue has been cut out.
  • the thus cut out section for staining purpose is pasted on a slide glass and then stained with, for example, a dye for pathological diagnosis (Step S 4 ).
  • the stained-section image is acquired by observing the stained section for staining purpose with the optical microscope 2 (Step S 5 ).
  • the region to be picked up where the cells of interest exist for example, a region infiltrated by cancer cells, is determined (Step S 6 ).
  • Step S 7 the acquired analyte section image and the stained-section image are superposed and displayed so that the sections in the respective images can exactly overlap each other (Step S 7 ), and the positions of the small pieces 4 b corresponding to the determined region to be picked up in the section for staining purpose, for example, the column numbers and the row numbers of the small pieces 4 b , are recorded (Step S 8 ).
  • the glass substrate 4 is adhered to the sticky sheet 5 . It is also possible to paste the cut out section for pick-up purpose, onto the glass substrate 4 that has been previously adhered to the sticky sheet 5 .
  • the sticky sheet 5 is expanded by using the expanding stage 6 and the jig 7 , to thereby divide the glass substrate 4 (Step S 9 , Dividing Step).
  • the section for pick-up purpose pasted on the glass substrate 4 is also extended together with the glass substrate 4 in the planar direction, by which the section is divided into fragments along the positions of the grooves 4 a.
  • the sticky sheet 5 is held in a expanded state by the grip rings 10 a and 10 b , and the sticky sheet 5 is set on the specimen stage 2 b so that the surface on the side adhered with the glass substrate 4 is faced downward.
  • the manipulator 12 is operated within the field of view thereof to arrange the pickup needle 11 on the back of a small piece 4 b to be picked up.
  • the back face of the small piece 4 b to be picked up is pushed with the pickup needle 11 to thereby detach and drop the small piece 4 b from the sticky sheet 5 (Step S 10 , Pickup Step).
  • fragments of the region where the cells of interest exist can be picked up from the section for pick-up purpose, together with the small pieces 4 b .
  • the picked up cells are used in, for example, a genetic test or the like.
  • the selection of small pieces to be picked up and the pickup of the selected small pieces can be more easily and accurately conducted, through observation of the section pasted on the substrate, the small pieces formed after dividing the substrate, and the like, with the optical microscope.
  • the advantage is that the region where the cells of interest exist can be selectively picked up from the section with a simple structure and a simple operation only.
  • another advantage is that the production cost can be kept low.
  • the section is mechanically cut.
  • a section having a relatively thick thickness can be easily cut, and also the sizes of the small pieces 4 b can be easily enlarged only by adjusting the spacing between the grooves 4 a .
  • the operation that has so far required a large amount of labor because fragments have to be picked up from a plurality of sections so as to collect a sufficient number of cells, can be sufficed only by picking up one or a small number of small pieces 4 b .
  • the advantage is that the labor and the time required for the operation can be remarkably reduced.
  • the glass substrate 4 formed with the grid-like grooves 4 a is used as the substrate for pasting the section.
  • a glass substrate 4 comprising glass-made small pieces 4 b aligned in the planar direction.
  • the glass-made small pieces 4 b are previously adhered onto the sticky sheet 5 in an aligned state as shown in FIG. 7 .
  • the glass substrate 4 can be more easily and reliably divided along the border (dividing lines) between the small pieces 4 b when the sticky sheet 5 is expanded.
  • the following method can be adopted as an example to produce the aligned state of the previously divided small pieces on the sticky sheet 5 .
  • the glass substrate 4 is adhered on the sticky sheet 5 , and the glass substrate 4 is scratched by a glass cutter. Then, the glass substrate 4 is cracked along the position of the scratch by hand. By so doing, the aligned state of the small pieces 4 b on the sticky sheet 5 as shown in FIG. 7 can be easily produced. At this time, it is preferable to carry out this procedure while protecting the surface of the glass substrate 4 with a film or the like so as to avoid contamination of the glass substrate 4 .
  • the structure of the substrate employed in the above-mentioned embodiment is only an example, and the present invention is not to be limited to this structure.
  • the material of the substrate may be not only a glass but also a resin or the like.
  • any shape may be adopted as long as the small pieces 4 b can be densely aligned on the surface of the sticky sheet 5 .
  • a regular hexagonal shape or a triangular shape may be adopted.
  • a material having a magnetic property may also be used as the substrate.
  • a material having a magnetic property may also be used as the substrate.
  • a treatment can be made more efficient, for example, by isolating the collected small pieces from a solution with use of the magnetic force when the small pieces are treated in the solution.
  • a material such as a metal which does not allow the transmission of visible light is used as the substrate, the small pieces 4 b , even though these are small, can be clearly observed by eyes at the time when observing the transmitted beam image of the sticky sheet 5 with the optical microscope.
  • a magnet can be used as the pickup unit 8 .
  • a magnet having approximately the same size as that of the magnetic particle is provided at the tip of the pickup needle 11 . Then, the tip of the pickup needle 11 is brought closer to a magnetic particle from the opposite side against the sticky sheet 5 , by which a desired magnetic particle can be held on the tip of the pickup needle 11 and picked up from the sticky sheet 5 by the magnetic force.
  • the employed structure is such that the optical microscope 2 of an erecting type is used and the expanding stage 6 is provided separately from the optical microscope 2 .
  • the structure of the cell collecting system 100 is not to be limited to this.
  • an inverted type can be adopted as the optical microscope 2
  • the expanding stage 6 can be installed in the optical microscope 2 .
  • FIG. 9 shows an example of the structure in which the expanding stage 6 and the jig 7 are provided to an inverted-type optical microscope 2 .
  • the specimen stage 2 b is provided slidably in the horizontal direction along a guide rail 2 c bridged between the observation position of the optical microscope 2 and a position out of the main body of the optical microscope 2 .
  • the sticky sheet 5 is expanded on the expanding stage 6 by moving the jig 7 downward in a state where the specimen stage is arranged in the observation position. Thereafter, the specimen stage 2 b is slid and the small pieces 4 b are picked up by using the pickup unit 8 having been provided separately from the optical microscope 2 .
  • FIG. 10 shows an example of the structure in which the expanding stage 6 , the jig 7 , and the pickup unit 8 are provided to an inverted-type optical microscope 2 .
  • the expanding stage 6 is provided above the specimen stage 2 b so that the stage can be moved integrally with the object lens in the vertical direction, and the expanding stage 6 is designed to be pushed against the sticky sheet 5 held on the specimen stage 2 b by the jig 7 , from the above.
  • a series of operations from the expanding of the sticky sheet 5 to the pickup of the small pieces 4 b can be done on the specimen stage 2 b.
  • the small pieces 4 b to be picked up are determined by making a comparison between the analyte section image of the section for pick-up purpose and the stained-section image of the section for staining purpose.
  • the small pieces 4 b to be picked up can be selected using the same image while observing the section for pick-up purpose with the optical microscope 2 (Step S 11 ). Thereafter, the sticky sheet 5 can be expanded (Step S 9 ) and the small pieces 4 b can be picked up (Step S 10 ). By so doing, the procedure can be much more simplified as required.
  • the approximately columnar expanding stage 6 is used to expand the sticky sheet 5 .
  • the unit to expand the sticky sheet 5 is not to be limited to this.
  • an outer cylinder 14 a and an inner cylinder 14 b that can be accommodated in the outer cylinder 14 a can be adopted.
  • the sticky sheet 5 is covered over the top surface of the outer cylinder 14 a and fixed to the lateral surface of the outer cylinder 14 a .
  • the symbol 15 denotes a fixing member for fixing the sticky sheet 5 to the lateral surface of the outer cylinder 14 a .
  • the inner cylinder 14 b is protruded relatively from the inside of the outer cylinder 14 a , or as shown in FIG. 14 the inner cylinder 14 b is pushed relatively from the outside of the outer cylinder 14 a into the inside of the outer cylinder 14 a .
  • the sticky sheet 5 can be expanded approximately evenly in every direction.
  • the structure may also be such that as shown in FIG. 15A the sticky sheet 5 is held in a certain shape by the holder 16 in a position where the region adhered with the glass substrate 4 can be seen, and as shown in FIG. 15B the sticky sheet 5 is expanded by pressing the region adhered with the glass substrate 4 against the expanding stage 6 .
  • grip rings 10 c and 10 d can be composed of a top ring 10 c made from a magnet and an bottom ring 10 d made from a metal such as a stainless-steel having the same diameters, so that the both rings 10 c and 10 d can be tightly attached to each other by a magnetic force while sandwiching the sticky sheet 5 in a expanded state between the top ring 10 c and the bottom ring 10 d .
  • the both rings 10 c and 10 d may also be composed of magnets which generate attracting forces each other.
  • a small piece 4 b is detached and collected from the sticky sheet 5 by pushing the small piece 4 b from the back with the pickup needle 11 .
  • a suction member the interior of which can be sucked to a negative pressure By so doing, a small piece 4 b to be picked up can be detached from the sticky sheet 5 and collected into the suction member by bringing the suction member closer to the small piece 4 b from the opposite side against the sticky sheet 5 .
  • a substance that loses the stickiness by UV irradiation can also be used as the sticky sheet 5 .
  • a UV light source is equipped in the optical microscope 2 .
  • UV light radiated from the UV light source is irradiated locally to the position of a small piece 4 b to be picked up through the object lens, by which the small piece 4 b can be easily detached and collected from the sticky sheet 5 .
  • a similar effect can also be achieved by guiding UV light through an optical fiber and locally irradiating the light toward the position of the small piece 4 b to be picked up while orienting the fiber end thereto.
  • a tubular suction member in which a hole having a size not allowing each small piece to pass through, is made at the tip.
  • the interior of the suction member can be set to a negative pressure as required, by which the small piece can be adhered at the tip, and then transferred and picked up from the top of the sticky sheet.
  • the stickiness can be weakened by UV irradiation. It is possible to detach all or optional small pieces onto the flat plate 18 by a needle assembly member 17 as shown in FIG. 19 in a state where the stickiness has been weakened in such a sticky sheet, and to pick up necessary small pieces from the group of the detached small pieces on the flat plate 18 .
  • the method for picking up it is possible to pick up by holding each piece with a pair of tweezers, or to pick up by sucking each piece with the above-mentioned tubular suction member 19 as shown in FIG. 20A or FIG. 20B .
  • a funnel-shaped guide member 22 can be used to pick up the small pieces having been dropped by pushing from the back of the expanded sticky sheet 5 with a needle 21 . Or, they can be picked up by sucking with the above-mentioned tubular suction member 19 as shown in FIG. 21B .
  • a pig colon was used as the biological tissue.
  • a section having four side lengths of about 10 mm and a thickness of 50 ⁇ m was cut out from the biological tissue by freeze sectioning.
  • the cut out section was pasted on two cover glasses, which had been aligned to be adjacent to each other at the corners and pasted on a dicing sheet (expandable member), so that the section was bridged over the border (dividing line) between these cover glasses. Thereafter, the section was dried by air.
  • the cover glass used herein had respective side lengths of 18 mm and a thickness of 0.13 to 0.17 mm.
  • FIG. 17 shows a state before expanding the dicing tape.
  • the line L seen in the vertical direction in the approximate middle of the photograph is the border (dividing line) between the cover glasses.
  • FIG. 18 shows the state after expanding the dicing tape. It was found that the section was sharply divided along the border between the cover glasses.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
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  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
US13/686,296 2010-05-28 2012-11-27 Cell collection apparatus, cell collecting system, and cell collecting method Abandoned US20130084599A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/011,917 US20140011233A1 (en) 2010-05-28 2013-08-28 Cell collection apparatus, cell collecting system, and cell collecting method
US14/528,508 US9304068B2 (en) 2010-05-28 2014-10-30 Cell collection apparatus, cell collecting system, and cell collecting method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
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