JP5771731B2 - Reaction vessel used for sample processing apparatus and sample processing method - Google Patents

Description

  The present invention relates to a sample processing apparatus and a sample processing method for extracting biological molecules such as nucleic acids and proteins from biological samples containing cells, bacteria, viruses and the like, or in addition to separating and purifying them. Furthermore, it is related with the reaction container used for these sample processing apparatuses and sample processing methods.

  In the study of biological phenomena such as biology and medicine, extraction, separation and purification of biological molecules such as nucleic acids and proteins from biological samples such as blood, plasma and tissue fragments are necessary for obtaining test substances. This is a basic and important operation. In addition, the above-described operation is used not only in the research of life phenomena but also in industries such as crop varieties improvement and food inspection to obtain a test substance.

  For nucleic acid testing, the PCR (Polymerase Chain Reaction) method that can amplify DNA and RNA has become widespread. In addition, NASBA (Nucleic Acid Sequence-Based Amplification) method, SDA (Strand Displacement Amplification) method, 3SR (Self-Sustained Sequence Replication) method, TMA (Transcription-Mediated Amplification) method, Qβ Replicase Amplification method, LAMP (Loop) There are various nucleic acid amplification methods such as -mediated isothermal Amplification), and the application range of nucleic acid testing is expanding. Therefore, the need for techniques for extracting, separating, and purifying nucleic acids from biological samples more rapidly and simply will increase.

  A phenol / chloroform extraction method is known as a method for extracting, separating and purifying nucleic acids such as DNA and RNA from a biological sample. However, this method has a heavy burden on the operator because of the use of an organic solvent and complicated operation. Therefore, in order to solve this problem, as a method for extracting, separating and purifying nucleic acid from a biological sample, a method utilizing the property of binding nucleic acid to silica or glass fiber in the presence of a chaotropic agent (for example, non-patent) Document 1) was proposed, and an apparatus for automatically performing nucleic acid extraction was also developed (for example, Patent Documents 1 and 2).

  The flow of nucleic acid extraction, separation, and purification that is usually performed in an automatic apparatus is as follows (1) to (6).

  (1) Cells contained in a biological sample are disrupted with a solution containing a chaotropic agent or a surfactant, and nucleic acid is eluted in the solution. (2) Nucleic acid is adsorbed on the particle surface by adding and mixing magnetic beads (magnetic silica particles) coated with silica on the surface. (3) A magnet is approached from the outside of the reaction vessel, and the solution containing unnecessary substances such as proteins is removed using a pump or the like while capturing the magnetic beads in the reaction vessel. (4) Add a washing solution to the reaction vessel and move unnecessary materials into the solution. (5) The magnet is again approached from the outside of the reaction vessel, and the solution containing unnecessary substances is removed while capturing the magnetic beads in the reaction vessel. (6) After removing the washing solution, sterilized water or a buffer having a low salt concentration is added to the magnetic beads to elute the nucleic acid from the surface of the magnetic beads.

Special table 2003-504195 JP 2004-337137 A

Boom, R., Sol, C. J. A. Salimans, M. M. M., Jansen, C. L., Wertheimvan Dillien, P. M. E., and van der Noordaa, J., J. Clin. Microbiol., 28, 495-503 (1990).

  As the market shifts from clinical research to clinical testing, it is required to process randomly provided samples from time to time and feed back the test results to the diagnosis more quickly.

  The apparatus described in Patent Document 1 is a so-called batch process that processes a plurality of samples simultaneously when processing a plurality of samples, and does not process a sample provided randomly at any time. The automated device described in Patent Document 2 is described as “installing a plurality of sets of extraction devices in the apparatus main body” when processing a plurality of samples, and a vertical movement mechanism of a plurality of arms; A large number of drive units such as a movement mechanism for a plurality of arm positions are required. Patent Document 2 also states that a plurality of sample containers can be mounted at the same time, but clearly states that they can be processed at the same time, and batch processing that performs the same operation by sharing the drive units of a plurality of extraction devices. In this case, too, a randomly provided specimen cannot be processed at any time.

  An object of the present invention is to batch process biological samples (for example, specimens) in an apparatus for reacting a biological sample with a reagent to perform a series of processing, or to perform random processing at random and continuous processing as needed. Another object of the present invention is to provide a sample processing apparatus, a sample processing method, and a reaction vessel used for these.

In order to achieve the above object, the present invention provides the following as a reaction vessel used in the sample processing apparatus and method described above.
(Reaction vessel)
That is, a reaction vessel used to extract biological molecules from a biological sample using a reagent and magnetic beads, and has a box shape and is arranged so that the series of processing is performed on the box-shaped body. In a reaction vessel provided with a plurality of wells,
As the well, at least,
A reaction well supplied with a biological sample, a reagent for biological molecule extraction, a magnetic bead for biological molecule adsorption;
A magnetic chip storage well for storing a magnetic chip used for recovering the magnetic beads adsorbed with biological molecules to be attached to and detached from the stem; and
A cover storage well for storing the cover of the magnetic chip to be attached to and detached from the stem,
Further, when the magnetic chip or the cover is selectively inserted into any one of these wells, the magnetic chip or the cover is moved eccentrically with respect to the well via the reaction container. Equipped with a detachable mechanism that engages and disengages by
The attachment / detachment mechanism includes an upper presser plate and a lower presser plate that are provided facing the upper part of the opening of the processing unit, and these presser plates are adapted to the outer diameters of the magnetic chip and the cover. There is a notch that accepts eccentric movement,
These notches are provided so as to coincide with the well arrangement direction, and the openings of these notches are also directed in the well arrangement direction.
(Ancillary aspects)
The reaction container according to the present invention optionally includes the following aspects.
(1) The upper pressing plate and the lower pressing plate are shared by the magnetic chip and the cover, and each pressing plate has a curvature corresponding to the outer diameter of the magnetic chip and a curvature corresponding to the outer diameter of the cover. The notch element which has these is formed in a composite.
(2) The upper pressing plate and the lower pressing plate are separately arranged for the magnetic chip and the cover, and the upper pressing plate and the lower pressing plate for the magnetic chip are arranged on the outer side of the magnetic chip. A notch having a curvature corresponding to the diameter is formed, and a notch having a curvature corresponding to the outer diameter of the cover is formed on the upper pressing plate and the lower pressing plate for the cover.

  According to the present invention, a biological sample (analyte) is batch-processed in a series of processes (for example, processes for extracting, separating and purifying biological molecules such as nucleic acids and proteins) by reacting a biological sample with a reagent. It is possible to provide a sample processing apparatus which can be processed or can be randomly input and continuously processed as needed, and a reaction vessel used for the sample processing method.

It is a perspective view which shows typically the structural example of the sample processing apparatus which concerns on this invention. In FIG. 1, it is sectional drawing which looked at the set part of the reaction container from the x-axis direction. In FIG. 1, it is sectional drawing which looked at a part of set part of the reaction container from the y-axis direction. In FIG. 1, it is a top view of the reaction container group which shows an example of an arrangement | sequence when a reaction container is set to the setting part of a reaction container at any time, and is moved independently. In FIG. 1, it is a top view of the reaction container group which shows the other example when a reaction container is set to the setting part of a reaction container at any time, and is moved independently. It is a figure which shows an example of the stem of the sample processing apparatus which concerns on this invention, a magnetic chip, and a cover. It is a figure which shows an example when a magnetic chip | tip and a cover are mounted | worn with the said stem. It is a figure which shows an example when a cover is mounted | worn with the said stem. It is a perspective view which shows the structural example of the reaction container in the sample processing apparatus which concerns on this invention. It is a top view of the reaction container of FIG. 5A. It is a top view which shows the other structural example of the reaction container in the sample processing apparatus which concerns on the Example of this invention. It is sectional drawing of the reaction container of FIG. 6A. It is sectional drawing which shows the reaction container of the sample processing apparatus which concerns on a present Example. In the sample processing method which concerns on the Example of this invention, it is a cross-sectional schematic diagram which shows the step which a stem falls to a cover storage well. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a cover is mounted | worn with a stem. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a reaction container moves (eccentric) in a y-axis direction after cover attachment. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the raise process from which the stem with which the cover was mounted | worn comes out from a cover storage well. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a reaction container moves to a y-axis direction so that a reaction well may come directly under the stem with which the cover was mounted | worn. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the cover was mounted | worn descend | falls to the reaction well. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the cover was mounted | worn fell to the reaction well, and reached the bottom dead center. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a reaction container moves to a y-axis direction so that a cover storage well may come right under the stem with which the cover was mounted | worn. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the cover was mounted | worn descend | falls to a cover storage well. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the cover was mounted | worn descend | falls to the cover storage well, and reached the bottom dead center. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the reaction vessel moves (eccentric) in the y-axis direction after the stem attached with the cover descends to the cover storage well and reaches the bottom dead center. . In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a stem detaches and raises a cover. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a reaction container moves to a y-axis direction so that a magnetic chip storage well may come right under a stem. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a stem falls to a magnetic chip storage well. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the reaction container moves to a y-axis direction. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the magnetic chip was mounted | worn raises. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a reaction container moves to a y-axis direction so that a cover storage well may come right under the stem with which the magnetic chip was mounted | worn. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the magnetic chip was mounted | worn descend | falls to a cover storage well. In the sample processing method of this example, a cross-sectional schematic diagram showing the process in which the reaction vessel moves (eccentric) in the y-axis direction after the stem equipped with the magnetic chip and the cover descends to the cover storage well and reaches the bottom dead center. FIG. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem equipped with the magnetic chip and the cover raises. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which a reaction container moves to a y-axis direction so that a reaction well may come directly under the stem with which the magnetic chip and the cover were mounted | worn. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem equipped with the magnetic chip and the cover descends to the reaction well. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem equipped with the magnetic chip and the cover collects magnetic beads. In the sample processing method of a present Example, it is a cross-sectional schematic diagram which shows the process in which the stem with which the magnetic chip and the cover were mounted | worn rose while collecting magnetic beads.

Hereinafter, embodiments according to the present invention, in particular, a sample processing apparatus, a sample processing method, and a reaction vessel used in these will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiment taken up here.
(Configuration of sample processing equipment)
FIG. 1 schematically shows a configuration example of a sample processing apparatus according to the present invention. The sample processing apparatus includes a mounting table 101, a sample rack 102 that can store a sample container filled with a biological sample to be processed, a reagent rack 103 that can store a plurality of reagent bottles, and a chip that stores a plurality of disposable chips. A rack 104, a waste container 117 for discarding waste, a nozzle mechanism 105 disposed at a position facing one surface of the mounting table 101 so as to be movable in the x-axis, y-axis, and z-axis directions, and a nozzle mechanism 105, a drive control unit 109 that controls the movement, aspiration, and discharge of the 105, a reaction vessel 110 that performs a series of processes for extracting, separating, and purifying biological molecules from a biological sample, and cooperating with the reaction vessel 110 The integrated stem mechanism 111 used for performing the series of processes, the reaction vessel setting unit 120 in which a plurality of reaction vessels 110 can be juxtaposed, and the reaction vessel setting unit 12 Reaction container moving mechanism (reaction container mounting stage 201, movable element 202, screw rod 203, servo motor (actuator) in FIG. 2A) that translates (reciprocally moves) the reaction container 110 set in the chamber independently for each reaction container. 116).

  The biological sample in the text is not particularly limited, but (1) biological samples such as blood, plasma, tissue fragments, body fluids and urine collected from animals including humans, and (2) animal cells and plant cells. And cells such as insect cells, (3) microorganisms such as bacteria, fungi and algae, and (4) viruses (including virus-infected cells). The biological sample includes a culture solution in which these cells, microorganisms and viruses are cultured, and a suspension in which these cells, microorganisms and viruses are suspended. In addition, these biological samples contain biological molecules that are subject to separation and extraction and purification by a sample processing apparatus. Here, the biological molecule means nucleic acids such as DNA and RNA, proteins such as enzymes and antibodies, and peptide fragments. The sample processing apparatus according to the present invention is not limited to nucleic acids, proteins, and peptide fragments, but is also subject to compounds (organic compounds and low molecular compounds) produced by cells and microorganisms. Including.

  The sample rack 102 has a box shape that can accommodate a plurality of sample tubes filled with different or identical biological samples. The sample rack 102 is arranged so that a plurality of sample tubes can be dispensed by the nozzle mechanism 105, and the dispensed sample tubes can be taken out of the apparatus and the next sample tube can be set. The reagent rack 103 has a box shape that can accommodate a plurality of reagent bottles. Different reagent bottles can be accommodated in the reagent rack 103 depending on the processing performed on the biological sample. For example, when a process of extracting a nucleic acid component from a biological sample is performed, a reagent bottle of a solution containing a chaotropic agent, a reagent bottle of a washing liquid, a reagent bottle of an eluent, and an oil to be dispensed into the reaction container 110 are used. Reagent bottles and the like can be accommodated in the reagent rack 103.

  The reaction container 110 is a box-shaped container in which wells serving as a plurality of processing units described later are arranged in a row. There are various types of wells. In this embodiment, the cover storage well 501, the magnetic chip storage well 502, the reaction well 503, the cleaning well (# 1) 504, the cleaning well (# 2) are shown in FIG. 5A. ) 505, elution well 506 is illustrated. A plurality of reaction vessels 110 can be collectively set in the sample processing apparatus for the purpose of batch processing, but any number can be set in the sample processing apparatus, and additional sets can be made as necessary. A series of processing can proceed independently at random. The set portion 120 of the reaction vessel 110 includes a mechanism that allows each reaction vessel 110 to independently translate (straight). The translation mechanism and the reaction vessel will be described in detail later.

  Although not shown, the nozzle mechanism 105 has a cylindrical shape and is connected to a suction / discharge driving device such as a pump.

  The nozzle mechanism 105 moves in the x-axis direction along the nozzle mechanism moving guide X108, moves in the y-axis direction along the nozzle mechanism moving guide Y107, and moves in the z-axis direction along the nozzle mechanism moving guide Z106. Moving. Since the drive mechanism for moving these three axes in the x-axis, y-axis, and z-axis directions is well known, detailed description thereof is omitted. The nozzle mechanism 105 moves between the sample rack 102, the reagent rack 103, and the reaction container setting unit 120 on the mounting table 101 by a combination of the movements in the x-axis direction, the y-axis direction, and the z-axis direction, and aspirates the sample and the reagent. And can be discharged. For example, the nozzle mechanism 105 can aspirate the sample from the sample rack 102, move to the reaction well 503 in the reaction container 110, and discharge the sample to the well. Further, the nozzle mechanism 105 can aspirate the reagent from the reagent rack 103, move to the reaction well 503 in the reaction container 110, and discharge the reagent to the well. Further, the nozzle mechanism 105 can aspirate the cleaning liquid from the reagent rack 103, move to the cleaning well (# 1) 504 and the cleaning well (# 2) 505 of the reaction container 110, and discharge the cleaning liquid to the well. The nozzle mechanism 105 can suck the extract from the reagent rack 103, move to the elution well 506 of the reaction vessel 110, and discharge the extract to the well.

  The nozzle mechanism 105 can be mounted with a disposable chip mounted on the chip rack 104 at the tip. The user of the sample processing apparatus can replace the disposable chip mounted on the nozzle mechanism 105 with that on the chip rack 104 as necessary. By exchanging the disposable chip, it is possible to avoid contamination and carryover between reagents and samples. The disposable chip can be manufactured using a resin such as polyethylene, polypropylene, and polycarbonate.

  In addition, a user or manufacturer of the sample processing apparatus can put necessary reagents and cleaning liquid in a plurality of wells in the reaction container in advance. In this case, part or all of the reagent rack 103 may be unnecessary. Furthermore, in the downstream analysis, if it is determined that there is no influence of carryover or contamination, a part or all of the tip rack 104 may be unnecessary.

  An integrated stem mechanism 111 is disposed above the reaction vessel setting unit 120 so as to be movable in the vertical direction (z-axis direction). The integrated stem mechanism 111 includes a plurality of stems (401a to 401d) and a stem vertical movement mechanism 130 that supports these stems integrally and moves them in the z-axis direction. The plurality of stems (401a to 401d) are supported by a common support member 131 via respective stem holders (113a to 113d), and are uniaxially (z-axis direction) by the stem vertical movement mechanism 130 via the support member 131. Do exercise. The stem vertical movement mechanism 130 includes various mechanisms such as a mechanism that converts the rotational motion of a motor (actuator) into a linear motion in the z-axis direction, and a mechanism that performs linear motion in the z-axis direction by turning on and off the solenoid (actuator). However, as long as it can be controlled by an electric signal of the integrated stem mechanism drive control unit 112, the form is not limited.

  In the present embodiment, the stem vertical movement mechanism 130 moves the support members 131 common to the plurality of stems up and down, thereby allowing the plurality of stems to move up and down collectively with a single driving device. In this way, the number of drive devices can be reduced. However, the present invention is not limited to this. For example, the number of motors used as the servo motor (actuator) of the stem vertical movement mechanism 130 is one for the entire stem, and the rotating shaft that rotates thereby is common. A mechanism (for example, a cam mechanism) that converts the rotation of the rotation shaft in the z-axis direction may be provided in each stem, and the stem may be configured to move up and down by each cam operation. It is also possible to provide a mechanism such as a solenoid for each stem and individually move the stem up and down as long as there is no cost problem.

  These stems (401 a to 401 d) form a row in the direction (x-axis direction) intersecting the moving direction (y-axis direction) of the reaction container 110, and the wells of the reaction containers 110 arranged side by side in the reaction container setting unit 120. They are arranged at a pitch that matches the pitch between the processing units. Positions (x-axis and y-axis direction positions) other than the position in the z-axis direction of the integrated stem mechanism 111 are fixed. For example, the initial position of the reaction container 110 in the reaction container setting unit 120 (the position indicated by the solid line in FIG. 1). Located above any well.

  The integrated stem mechanism 111 periodically moves up and down at a timing determined by the integrated stem mechanism drive control unit 112.

  The integral stem mechanism 111 includes a number of stems equal to the maximum number of reaction vessels 110 that can be set in the reaction vessel setting unit 120. In other words, the reaction vessel setting unit 120 can arbitrarily arrange reaction vessels 110 equal to or less than the number of stems. More specifically, the stems of the integrated stem mechanism 111 can be parallelized, for example, to about 8 to 12 stations. By parallelizing the stems, the processing capacity (throughput) per unit time can be improved.

  The reaction vessel 110 can move in the y-axis direction along the guide groove 115 at a timing determined by a servo motor (actuator) 116 as will be described later (in FIG. 1, the reaction vessel 110 is a solid line). Move in the dashed area).

The sample processing apparatus also includes a computer 133 that comprehensively controls the nozzle mechanism drive control unit 109, the integrated stem mechanism drive control unit 112, and the reaction vessel drive control unit 132. The computer 133 inputs processing conditions, information on a biological sample, and other various information, and generates a control signal for executing a sample processing method described later.
(Move reaction vessel)
2A is a schematic cross-sectional view of the reaction container setting unit 120 in FIG. 1 as viewed from the x-axis direction, and FIG. 2B is a schematic cross-sectional view of the reaction container in FIG. 1 as viewed from the y-axis direction.

  The reaction vessel 110 is placed on the upper surface of the stage 201. A plurality of movers 202 are attached to the lower surface of the stage 201. The mover 202 is provided with a female screw, and a screw rod 203 passes through the female screw. The screw rod 203 is rotationally driven by a servo motor (actuator) 116. Servo motors (actuators) 116 are provided by the maximum number of reaction containers 110 that can be set (placed side by side) in the reaction container setting unit 120, and are driven and controlled by a control signal from the reaction container drive control unit 132. By driving the servo motor (actuator) 116, the reaction vessel 110 can move along with the stage 201 in the y-axis direction (the direction of the arrow in FIG. 2A) along the guide groove 115.

  The reaction vessels 110 can be set in the reaction vessel setting section 120 within a range in which a maximum number of sets can be set, and each of them is independently moved (translated) by the corresponding servo motor (actuator) 116 in the well arrangement direction. Be controlled. As shown in FIG. 1, when a plurality of reaction vessels (110a to 110d in FIG. 3A) are set (arranged) from the beginning, each reaction vessel is controlled by a corresponding servo motor (actuator) 116. In this case, (i) when the processing on the biological sample executed in each of the reaction vessels 110a to 110d is the same, if the servo motor (actuator) 116 corresponding to each reaction vessel is controlled to move synchronously, By performing interlock control of this movement control and the integrated stem mechanism 111 (an example of specific contents of the interlock control will be described in detail later), a series of batch processing for a plurality of set reaction vessels Is performed (see FIG. 1). In addition, (ii) even when a plurality of reaction vessels are set side by side in an arbitrary number, biological samples in each reaction vessel are different and / or processing procedures are different. You may want the case. In this case, the movement of the reaction vessel is independently controlled via each servo motor (actuator) 116, and different well positions between the reaction vessels are directly below the integrated stem mechanism 111 according to the respective processing conditions. It is also possible to control as described above. Further, (iii) regardless of whether the processing conditions are the same or different, an arbitrary number of reaction vessels are additionally set in the reaction vessel setting section as needed (ie, with a time difference). It is also possible. In this case as well, the movement of the reaction vessel is independently controlled via each servo motor (actuator) 116 as in (ii).

  FIG. 3A is a schematic plan view showing an example of the case where the reaction vessel is independently moved and controlled as in (ii) and (iii) described above. Sample processing can be performed continuously at any time. That is, even if it does not wait until the process of one reaction container is complete | finished, it becomes possible to add the next reaction container at any time and to perform a continuous process.

  FIG. 3A shows the state of movement of the reaction container after setting the reaction containers 110a to 110c with a time difference as needed, and further shows an empty state in which a reaction container (110d) can be added if necessary. The stem of the integral stem mechanism and the reaction vessel can be arranged in parallel, for example, up to about 12 stations.

FIG. 3B shows a plan view of another embodiment of the reaction vessel, the reaction vessel setting unit, and the reaction vessel moving mechanism. In FIG. 3A, the reaction vessels are illustrated as being capable of translational movements independently, but in FIG. 3B, instead of this, the reaction vessels 110 ′ (110a ′ to 110d ′) are uniaxially (not shown). (Reaction vessels 110a ′ to 110d ′ move in the areas of solid lines and broken lines). The stem mechanism 111 ′ performs the same operation as the stem mechanism 111 described above by the stem vertical movement mechanism. When moving the reaction vessel in the rotation direction, the movement distance per unit rotation angle between the inner reaction vessel and the outer reaction vessel is greater on the outer side than on the inner side, so the pitch between the wells of each reaction vessel is correspondingly increased. Need to be set. That is, the reaction container has a smaller pitch between wells as the inner reaction container. With the above settings, in the case of this embodiment, the reaction container group has a fan shape when viewed from above.
(Stem)
The stem 401 is provided with different outer diameter portions for attaching and detaching the magnetic tip and the cover through the openings of the magnetic tip 402 and the cover 405 from the end of the stem to the middle portion of the stem.

  4A to 4C show an example of the stem 401, the magnetic tip (for example, rod-shaped magnetic body) 402, and the cover 405 according to the present invention. As shown in FIGS. 4A to 4C, each stem 401 can be covered with the magnetic chip 402 and the cover 405 or directly with the cover 405 without covering the magnetic chip 402.

Each of the magnetic tip 402 and the cover 405 has an opening at the base end opposite to the tip, the inside diameter of the opening is larger in the cover 405 than in the magnetic tip 402, and a flange is provided at the periphery of each opening. Part (404 and 406).
Further, the magnetic tip 402 has a shape in which the inner diameter of the base end portion is substantially the same as that of the distal end portion of the stem 401 and the diameter becomes smaller toward the distal end. The proximal end of 402 can be fitted. The magnetic chip 402 has a magnetic body 403 that generates a magnetic field at the tip.

  The cover 405 has an inner diameter at the base end that is substantially the same as the intermediate portion of the stem 401 and has a shape that decreases in diameter toward the tip. The base end of the cover 405 is fitted to the intermediate portion of the stem 401. be able to.

For the portion excluding the magnetic body of the magnetic chip 402 and the cover 405, a resin such as polyethylene, polypropylene, or polycarbonate can be used as a material.
(Reaction vessel)
FIG. 5A is a perspective view showing a configuration example of a reaction vessel in the sample processing apparatus according to the present invention. FIG. 5B shows a plan view of FIG. 5A.

  The reaction vessel 110 has a substantially box shape and has wells 501 to 506 serving as a plurality of processing units into which various reagents are dispensed.

  Here, each well is described as a cover storage well 501, a magnetic chip storage well 502, a reaction well 503, a cleaning well (# 1) 504, a cleaning well (# 2) 505, and an elution well 506. The number can be changed as appropriate according to the type of analysis. For example, if washing is an important analysis, additional washing wells may be added.

  The plurality of wells 501 to 506 of the reaction vessel 110 are formed as depressions having a predetermined volume. Each well forms a recess having a depth at which the bottom surface of the well and the cover do not come into contact with each other when the stem 401 equipped with the cover 405 reaches the bottom dead center. In this example, the elution well 506 is formed as a hollow portion shallower than the reaction wells 501 to 505 so as to be smaller than the volume of the reaction wells 501 to 505.

  The number and volume of the wells are not particularly limited, and can be appropriately set according to the content of the treatment on the biological sample.

  Each well of the reaction vessel 110 includes an attachment / detachment mechanism for attaching / detaching the magnetic chip 402 and the cover 405 attached to the stem 401. Hereinafter, this attachment / detachment mechanism will be described in detail.

  The attachment / detachment mechanism includes an upper pressing plate 507 and a lower pressing plate 508 for holding the magnetic chip 402 and the cover 405. The upper presser plate 507 and the lower presser plate 508 are disposed substantially parallel to each other with a predetermined interval immediately above the opening of each well. Further, as shown in FIG. 5B, the upper pressing plate 507 and the lower pressing plate 508 are provided with a notch portion 509 facing each well, and the notch portion 509 has two types of notch elements 509a having different curvatures. , 509b. The notch element 509 a has a curvature larger than that of the flange portion 406 with a curvature equal to or smaller than the outer diameter of the cover so that the notch element 509 a can be adapted to the outer diameter of the cover 405. The notch element 509 b has a curvature larger than that of the flange portion 404 with a curvature equal to or smaller than the outer diameter of the magnetic tip so that it can be adapted to the outer diameter of the magnetic tip 402.

  As described above, the notch portion 509 has a two-stage notch structure by the notch elements 509a and 509b. When these notch elements are viewed from above, the notch element 509b is in a position deeper than the notch element 509a, and the openings of the notch elements 509a and 509b are respectively directed to the center of the well. The one end opposite to the opening of the notch element 509b is formed so as to be located immediately above or almost directly above the well opening edge. Further, the respective cutout portions 509 corresponding to the wells 501 to 506 are formed in a straight line in the moving direction when the reaction vessel 110 is mounted on the reaction vessel setting portion 120. The openings of the notch elements 509a and 509b are oriented in the reaction container moving direction.

  As shown in FIGS. 7A and 7B, when the magnetic chip cover 405 is eccentric from the center of the well (501 to 506) toward the notch 509, a part of the outer diameter of the cover is in contact with the notch element 509a. Thus, a part of the flange portion 406 is caught on the upper and lower pressing plates 507 and 508. Further, when the magnetic chip 402 is decentered further toward the notch 509 side than the center of the well (501 to 506) without a cover, a part of the outer diameter of the magnetic chip 402 is in contact with the notch element 509b. A part of the flange portion 404 is caught on the upper and lower pressing plates 507 and 508. When the cover 405 and the magnetic tip 402 are concentric with the well or at a position eccentric to the opposite side of the notch 509, the flange 406 or 404 is detached from the holding plates 507 and 508, and the cover and the magnetic tip are placed in the well. On the other hand, it can be put in and out (inserted and removed), that is, can be attached and detached.

  In the above embodiment, the pressing plate for the magnetic chip cover and the pressing plate for the magnetic chip are constituted by the common upper pressing plate 507 and the lower pressing plate 508, and one notch portion 509 is formed on these pressing plates 2 It comprises stepped cutout elements 509a and 509b. Instead, as shown in FIGS. 6A and 6B, a magnetic chip cover pressing plate and a magnetic chip pressing plate are separately provided, and the former is constituted by an upper pressing plate 507a and a lower pressing plate 508a. The latter is composed of an upper pressing plate 507b and a lower pressing plate 508b, and two types of notch elements (notch portions) 509a and 509b having different curvatures are separately formed on the former and latter pressing plates. Also good. Further, the former and the latter pressing plates may be arranged in steps.

  In such a notch structure, when the flange portion 406 of the cover 405 is hooked on the holding plates 507a and 508a, the cover 405 may be eccentric with respect to the well toward the notch portion 509a. Further, when the flange portion 404 of the magnetic tip 402 is hooked on the pressing plates 507b and 508b, the magnetic tip 402 may be eccentric to the notch 509b side with respect to the well.

  The openings of the notches 509a and 509b in this case are also directed toward the well center in the moving direction of the reaction vessel 110.

  If necessary, an oil layer may be added to the upper part of each reaction well in order to prevent volatilization or bringing liquid into an adjacent well. Such an oil layer technology is disclosed in Japanese Patent Application No. 2009-285343, which is the prior application of the present applicant.

  The magnetic chip 402 is stored in advance in the magnetic chip storage well 502 of the reaction vessel 110 (502 in FIG. 7A) and is set in the apparatus together with the reaction vessel 110. This storage may be performed by the manufacturer supplying the reaction vessel, or by the user each time.

  The cover 405 is stored in advance in the cover storage well 501 of the reaction vessel 110 (501 in FIG. 7A) and is set in the apparatus together with the reaction vessel 110. This storage may be performed by the manufacturer supplying the reaction vessel, or by the user each time.

  The chip rack 104 has a plurality of openings for accommodating a plurality of disposable chips. This opening has a diameter that is slightly larger than the outer diameter of the disposable chip and slightly smaller than the flange of the disposable chip.

  The waste container 117 is a container for discarding used disposable chips, magnetic chips 402 and cover 405, biological samples after treatment, washing liquid, and the like, and has a box shape. Although not shown, the waste container 117 preferably includes a removal mechanism for removing a disposable chip, a magnetic chip 402, and a cover 405 attached to a part of the distal end side of the stem 401 or an intermediate part. . As a removing mechanism, for example, a pressing plate that abuts against the flange portion of the disposable tip, the flange portion 404 of the magnetic tip 402 and the flange portion 406 of the cover 405 and drives the stem 401 upward to push down the flange portion downward. Can be adopted. It should be noted that the removal mechanism only needs to be provided in one of the stem 401 and the waste container 117.

  Although not shown, the nozzle mechanism drive control unit 109 includes a power source such as a motor, a drive mechanism including a gear mechanism and an arm that transmits power from the power source, and the nozzle mechanism 105 described above with the x axis in FIG. and a control board for outputting a control signal to the drive mechanism for causing a dispensing operation by movement and suction / discharge along the y-axis and the z-axis. In the control board, various conditions set by the operator on the computer 133 are input or various conditions set in advance are read out and used.

  By the way, the sample processing apparatus mentioned above was the structure which attaches the reaction container 110 which has a cover attachment / detachment mechanism to the mounting base 101. FIG. However, the sample processing apparatus may include a cover removal mechanism at a position where the reaction container 110 is attached. That is, the sample processing apparatus may have a cover attaching / detaching mechanism.

  The sample processing apparatus configured as described above can perform various processes on biological samples.

  Hereinafter, an embodiment of a biological sample processing method using the sample processing apparatus configured as described above will be described.

  In the following, a sample processing method will be described by taking as an example a mode for performing a process of extracting a nucleic acid component from a biological sample.

  Specifically, the sample processing method includes (1) mixing a silica-coated magnetic bead in the presence of a chaotropic agent with a sample containing nucleic acid and other impurities, and (2) adsorbing the nucleic acid on the surface of the magnetic bead. (3) separating the magnetic beads adsorbing the nucleic acid, and (4) performing nucleic acid extraction by eluting the nucleic acid from the magnetic beads after washing. In addition, since the integrated stem mechanism 111 above the plurality of reaction vessels 110 is an integrated type, it performs only a simple vertical movement or a preset periodic vertical movement. The preset periodic up / down motion is, for example, a reciprocating motion between the top dead center and the bottom dead center, not a simple reciprocating motion, but 0.5 seconds at the top dead center and bottom dead center or at a specific height. A periodic operation that is set so as to provide a stop time.

  In the present processing apparatus, each reaction vessel 110 independently translates in a preset y-axis direction. For example, when it is necessary to move the stem 401 attached with the cover 405 up and down in the washing well (# 1) 504 with respect to the first reaction vessel 110a, the stage 201 on the mounting table 101 on which the reaction vessel 110a is placed is If the washing well (# 1) 504 is moved in the y-axis direction and positioned immediately below the cover 405 and stopped, the cover 405 directly connected to the integrated stem mechanism 111 that simply moves up and down is removed from the washing well (# 1). ) Move up and down within 504. At this time, the adjacent reaction vessels 110b can be arranged at completely different positions from the cover 405 by a program that uniquely controls the translational movement in the y-axis direction.

  If the reaction vessel 110 is not mounted on the stage 201 by the independent translational movement in the y-axis direction for each reaction well 110, the reaction vessel 110 can be mounted at any time, and the sample is continuously loaded. Can be realized.

  As a more specific operation of one reaction vessel stage, first, as shown in FIG. 7A, a reaction well 503 includes a biological sample to be processed, a solution 701 containing a chaotropic agent and a surfactant, a washing well (# 1) Dispense the washing solution into the washing well (# 2) 504 and the elution solution into the elution well 506. When dispensing these solutions into the wells 501 to 506, a disposable tip is attached to the nozzle mechanism 105. In order to attach the disposable chip to the nozzle mechanism 105, first, the nozzle mechanism 105 is controlled by the nozzle mechanism drive control unit 109, the center of the base end of the disposable chip accommodated in the chip rack 104, and the tip of the nozzle mechanism 105. Are moved to exactly opposite positions (movement in the x-axis and y-axis directions). Next, the disposable chip can be attached to the tip of the nozzle mechanism 105 by moving the nozzle mechanism 105 downward (z-axis) under the control of the nozzle mechanism drive control unit 109. The disposable chip can be attached to the nozzle mechanism 105 by the series of operations described above.

  Then, with the disposable chip attached, the nozzle mechanism 105 is moved above the reagent rack 103 under the control of the nozzle mechanism drive control unit 109, the tip of the disposable chip is inserted into the reagent bottle, pump means (not shown), etc. A predetermined amount of solution is sucked by the suction / discharge driving device.

  Thereafter, under the control of the nozzle mechanism drive control unit 109, the nozzle mechanism 105 is moved above the reaction vessel 110, and the tip of the disposable chip is positioned on a predetermined well (any one of 501 to 506). In this state, the suction / discharge driving device operates, and the solution sucked into the disposable chip can be dispensed into a predetermined well (any one of 501 to 506).

  When dispensing of the solution is completed, the nozzle mechanism 105 is moved above the waste container 117 under the control of the nozzle mechanism drive control unit 109, and a removal mechanism (not shown) attached to the nozzle mechanism 105 or the waste container 117 is shown. To dispose of the used disposable chip.

  The series of operations described above are operations common when dispensing a solution containing a cleaning solution, an eluent, a chaotropic agent, or a surfactant. The biological sample is dispensed by the above series of operations except that a predetermined amount of biological sample is aspirated from the sample tube accommodated in the sample rack 102. In addition, when dispensing wash solutions, eluents, biological samples, and solutions containing chaotropic agents and surfactants, different disposable tips were used, but depending on the reaction, disposable tips are used. It does not have to be. In addition, the nozzle mechanism 105 dispenses various reagents and specimens on the apparatus. However, the various reagents may be dispensed into the reaction vessel 110 in advance by the manufacturer, or an analyst in advance outside the apparatus. You may implement. The sample may be dispensed by an analyst outside the apparatus.

  Next, as shown in FIG. 7A, silica-coated magnetic beads 702 are dispensed into a reaction well 503 into which a biological sample to be treated has been dispensed by a magnetic bead dispensing mechanism (not shown). The magnetic beads 702 may be dispensed into the reaction well 503 in advance, or a solution in which the magnetic beads 702 are dispersed may be dispensed into the reaction well 703 in the same manner as the operation of the nozzle mechanism 105 described above. good. In addition, although the biological sample is dispensed at the stage shown in FIG. 7A, the biological sample may be dispensed together with the magnetic beads 702 or sequentially at this stage.

  Here, the magnetic beads 702 may be of any material, shape and particle size as long as the beads have characteristics as a magnetic material conventionally used in the field of biotechnology. Further, when nucleic acid extraction processing is performed in the sample processing apparatus, magnetic beads 702 having nucleic acid adsorption ability are used. The nucleic acid adsorption ability can be imparted by coating the surface of beads made of a magnetic material with silica.

  At this stage, since a chaotropic agent is present in the reaction well 503, the nucleic acid component contained in the biological sample is adsorbed on the surface of the magnetic beads 702 coated with silica. In this stage, the inside of the reaction well 503 may be stirred. In order to stir the inside of the reaction well 503, for example, a method of moving the magnetic beads 702 inside by periodically applying a magnetic field from the outside of the reaction vessel 110, or a cover 405 is attached to the stem 401 and integrated. A method can be used in which the integrated stem mechanism 111 is controlled by the shaft mechanism drive control unit 112 and the cover 405 attached to the stem 401 is swung inside the reaction well 503 (FIG. 7H).

  If necessary, an oil layer may be added to the upper part of each reaction well in order to prevent volatilization or bringing liquid into an adjacent well.

  A series of operations (nucleic acid extraction, separation, and purification) as points in the present embodiment are performed in wells 501 to 506, as shown in FIG. 7A, respectively, cover 405, magnetic chip 402, reaction solution (sample, reagent). And after preparing magnetic beads, a washing solution, and an eluent, it is carried out as follows. In the following series of operations, as described above, the integrated stem mechanism 110 moves up and down by the stem vertical movement mechanism, and each reaction vessel 110 moves through the stage 201 in the well arrangement direction by each reaction vessel movement mechanism. . Further, these moving mechanisms are interlocked and controlled via the stem mechanism drive control unit 112 and the reaction vessel drive control unit 132 in accordance with a control command from the host computer 113.

  FIG. 7A shows a state in which a reaction container into which a reagent and a specimen including magnetic beads are dispensed is mounted on the reaction container setting unit 120 on the apparatus.

  The plurality of stems 401 perform a periodic vertical movement set at a predetermined position (position shown in FIG. 1). Here, it is assumed that not a simple reciprocating operation, but a periodic operation set to provide a stop time of 0.5 seconds at the top dead center and the bottom dead center.

  First, a cover 405 is attached to the stem 401 in order to stir the mixed solution in the reaction well 503.

  While the integrated stem mechanism 111 is at the top dead center and is stopped for 0.5 seconds, the reaction vessel 110 is moved so that the cover storage well 501 comes directly under the stem 401 (note that the subsequent reaction vessel 110 Is also done via the stage). After a waiting time of 0.5 seconds, the stem 401 is lowered (FIG. 7B), and the cover 405 is attached to the stem 401 (FIG. 7C). The cover is attached at the bottom dead center of the integrated stem mechanism 111. In order to remove the cover from the cover holding portion (the gap between the upper pressing plate 507 and the lower pressing plate 508) in the reaction vessel, the reaction vessel 110 is slightly moved in the y-axis direction (in FIG. (Eccentric direction). When the integrated stem mechanism 111 is raised at this point, the stem 401 and the cover 405 attached thereto are taken out from the reaction vessel 110 as shown in FIG. 7E.

  While the integrated stem mechanism 111 is above the reaction vessel 110 in FIG. 7F, the reaction vessel 110 is moved so that the reaction well 503 comes directly under the stem 401.

  In FIG. 7G, the integrated stem mechanism 111 descends and enters the reaction well 503. At this time, the lowered positions of the stem 401 and the cover 405 are in an eccentric state on the opposite side of the notch 509 with respect to the well center. Accordingly, the flange portion 406 of the cover 405 can be lowered without interfering with the holding plates 507 and 508.

  In FIG. 7H, the integrated stem mechanism 111 reaches the bottom dead center. At this position, the stage 201 is controlled to stop, and agitation is performed a plurality of times by the cover 405.

  After stirring, the magnetic beads are washed as will be described later.

  In FIG. 7I, when the integrated stem mechanism 111 is at the top dead center, the stage 201 moves the reaction container 110 so that the cover storage well 501 comes directly under the cover 405.

  When waiting at this position, the integrated stem mechanism 111 descends (FIG. 7J) and reaches the bottom dead center (FIG. 7K). While the integrated stem mechanism 111 is stopped for 0.5 seconds at the bottom dead center, the reaction vessel 110 is slightly moved (eccentric) toward the notch 509 in the y-axis direction (indicated by the arrow in FIG. 7L). Direction), the flange portion 406 of the cover 405 is sandwiched between the cover holding portions (the gap between the upper pressing plate 507 and the lower pressing plate 508). When waiting here, the integrated stem mechanism 111 rises, so that the cover 405 is pressed by the pressing plates 507 and 508, and the cover 405 is removed from the stem 401 (FIG. 7M).

  When the integrated stem mechanism 111 reaches the top dead center in FIG. 7N, the reaction vessel 110 is moved so that the magnetic chip storage well 502 comes directly under the stem 401. When waiting here, as shown in FIG. 7O, the integrated stem mechanism 111 is lowered and the magnetic chip 402 is attached to the stem 401.

  In FIG. 7P, the reaction vessel 110 is slightly moved in the y-axis direction (that is, eccentric to the opposite side to the notch 509), and the magnetic chip 402 is moved to the gap between the upper pressing plate 507 and the lower pressing plate 508. If the integrated stem mechanism 111 is raised in FIG. 7Q, the stem 401 with the magnetic chip attached is positioned above the reaction vessel 110.

  7R to U, a cover 405 is attached to the stem 401 from above the magnetic chip 402. That is, in FIG. 7R, the reaction vessel 110 is moved so that the cover storage well 501 comes directly under the stem 401 with the magnetic chip 402 attached. In FIG. 7S, the integrated stem mechanism 111 is lowered to allow the stem 401 with the magnetic tip 402 to enter the cover storage well 501. As a result, the cover 405 is attached to the stem 401. In FIG. 7T, the reaction vessel 110 is slightly moved in the direction of the arrow (movement in a direction in which the cover 401 and the stem 401 with the magnetic tip are eccentric relative to the notch 509 relative to the cover storage well 501). As a result, the cover 401 and the stem 401 with the magnetic tip are detached from the holding plates 507 and 508. In this state, as shown in FIG. 7U, the cover 401 and the stem 401 with the magnetic tip are pulled up.

  In FIG. 7V, the reaction vessel 110 is moved so that the reaction well 503 comes directly under the stem 401 with the magnetic chip 402 and the cover 405 attached, and the reaction vessel 110 is stopped at this position. When the integrated stem mechanism 111 is lowered in FIG. 7W and the magnetic chip 402 and the cover 405 enter the reaction well 503, the magnetic beads 702 are collected. In FIG. 7X, when collecting the magnetic beads, the stem mechanism temporarily stops at the bottom dead center, and thereafter, the integrated stem mechanism 111 is raised as shown in FIG. 7Y. If the magnetic beads are not sufficiently collected by one reciprocating (up and down) movement of the stem, the integral stem mechanism may be set to reciprocate (up and down) a plurality of times.

  Although not shown in the drawings, the integrated stem mechanism 111 is positioned above the reaction vessel 110 by the integrated stem mechanism drive control unit 112 (the state where the magnetic beads 702 are collected: the state shown in FIG. 7Y). Then, the reaction vessel 110 is moved so that the washing well (# 1) 504 is located directly under the magnetic chip 402 and the cover 405 (that is, directly under the integrated stem mechanism). Thereafter, the stem mechanism 111 is lowered, and the cover 405 with magnetic beads and the magnetic chip 402 are caused to enter the cleaning well (# 1) 504. After the stem mechanism 111 reaches the bottom dead center, the reaction vessel 110 is slightly moved so that the flange portion 406 of the cover 405 is sandwiched (locked) by the holding plates 507 and 508 above the cleaning well (# 1) 504. Move (that is, the cover 405 is eccentric to the notch 509 side of the pressing plate). In this state, with the cover 405 remaining and the magnetic chip 402 mounted on the stem 401, the stem mechanism 111 is raised and the reaction vessel 110 is moved so that the magnetic chip storage well 502 comes directly under the stem mechanism 111. . By this operation, the magnetic beads 702 are immersed in the cleaning solution of the cleaning well (# 1) 504 away from the cover 405. In order to return the magnetic chip 402 attached to the stem 401 to the magnetic chip storage well 502, the stem mechanism 111 and the reaction container are operated so as to perform the reverse operation of FIGS. 7N to 7Q (that is, the operation of FIGS. 7Q to 7N). 110 is operated. Thereafter, the reaction vessel 110 is moved again so that the washing well (# 1) 504 comes directly under the stem mechanism 111. Thereafter, the stem mechanism 111 is lowered, the cover 405 locked to the pressing plates 507 and 508 of the cleaning well (# 1) 504 is mounted again on the stem 401, and the locking of the cover 405 to the pressing plate is released. The reaction vessel 110 is slightly moved to move the stem mechanism 111 up and down. By this vertical movement, stirring is performed in the cleaning liquid, and cleaning with the magnetic beads 702 is performed in the cleaning well (# 1) 504. By this washing, impurities such as proteins derived from biological samples can be removed from the surface of the magnetic beads.

  In the above cleaning, the cover 405 is left on the cleaning well (# 1) 504 with the holding plates 507 and 508 without performing the reverse operation of FIGS. 7N to 7Q, and the integral stem mechanism 111 is simply raised. However, since the magnetic chip 402 is separated from the cover 405 together with the stem 401, the magnetic beads 702 are detached from the cover 405 and immersed in the cleaning liquid in the cleaning well. However, in this case, the above-described stirring action due to the vertical movement of the cover cannot be expected, and the cleaning time is longer than that with stirring of the cleaning liquid.

  After the first washing, the reaction vessel 110 and the stem mechanism 111 are moved and controlled so that the magnetic chip 402 and the cover 405 are mounted on the stem 401 again, and the magnetic chip 402 and the cover 405 are washed with the washing well (# 1). When positioned at 504, the magnetic beads 702 are collected again on the cover 405. The stem mechanism 111 is raised with the magnetic beads 702 collected in this manner, and the reaction vessel 110 is moved so that the washing well (# 2) 505 is located directly below the stem mechanism 111. Thereafter, although not shown, the second cleaning operation is performed by operating the reaction vessel 110 and the stem mechanism 111 in the same manner as the first cleaning.

  Next, the stem 401 on which the magnetic chip 402 and the cover 405 that has adsorbed the magnetic beads 702 after washing are mounted relative to the elution well 506 by the vertical movement control of the stem mechanism 111 and the movement control of the reaction vessel 110 in the well arrangement direction. Move. Thereafter, operations similar to the cover attaching / detaching operation and the magnetic chip attaching / detaching operation performed in the cleaning process (stem vertical movement and reaction container arrangement direction moving control) are also performed between the elution well 506 and the magnetic chip storage well 502. Thereby, the magnetic beads 702 are detached from the cover 405 and immersed in the eluent in the elution well 506. As described above, each process so far includes the periodic vertical movement control of the integrated stem mechanism 111 by the stem mechanism drive control unit 112 and the well arrangement direction (y of the reaction vessel 110 by the reaction container drive control unit 132). (Axis direction) can only be achieved by translational motion control.

  In the elution well 506, the nucleic acid component adsorbed on the surface of the magnetic bead 702 can be eluted in the eluent. Through the above process, a series of processes of nucleic acid extraction, separation, and purification is performed. Finally, the magnetic beads 702 in the eluent are collected again at the tip of the cover 405 using the magnetic chip 402.

  Although the used magnetic chip 402 and the cover 405 that have collected the magnetic beads 702 are discarded, in this embodiment, in addition to the z-axis direction moving mechanism 130, the integrated stem mechanism 111 has an x-axis direction. , A movement mechanism (not shown) in the y-axis direction is added, and the integrated stem mechanism 111 is moved above the waste container 117 under the control of the stem mechanism drive control unit 112, and the nozzle mechanism 105 or the waste container 117 is moved. The cover 405 and the magnetic chip 402 are set to be discarded in a state in which the magnetic bead 702 is captured at the tip by operating the detaching mechanism attached to the head. Here, only the cover 405 may be removed and discarded, and the magnetic chip 402 not in contact with the liquid may be recovered and reused.

  Note that only the z-axis direction moving mechanism (stem up-and-down moving mechanism) is provided to the integrated stem mechanism 111, and the magnetic chip 402 and the cover 405 are discarded by the user himself / herself when replacing the reaction container 110. You may make it discard in a container. In this way, since the integral stem mechanism only needs to move in the z-axis direction, the mechanism and control can be simplified.

  In the nucleic acid extraction method using the sample processing apparatus according to this embodiment, the magnetic beads 702 are collected (captured) at the tip of the cover 405 and moved to the reaction well 503 to the elution well 506.

  In the conventional technique, sample dispensing nozzles are prepared as many as the number of reaction vessels. In such a conventional technique, when all samples are processed in a batch, a common reagent or a sample at a corresponding position can be sucked and discharged by a dispensing nozzle as many as the number of reaction containers using a single syringe pump. Although good, it is a typical batch process because the operation in all reaction vessels is the same. If each reaction container is provided with a syringe pump, a syringe pump and an xyz axis moving mechanism must be arranged in each reaction container, increasing the cost of the apparatus.

  In this embodiment, dispensing inside the apparatus is executed by one syringe pump, and a series of processes (stirring, collecting magnetic beads, etc.) relating to extraction of biological molecules performed in the reaction vessel are integrated. This is realized by the movement of the stem mechanism in the z-axis direction and the uniaxial movement of each reaction vessel in the y-axis direction. In particular, for the movement in the z-axis direction, the number of axes is one axis regardless of the number of parallel processes, and in order to increase the degree of parallelism, it is only necessary to add one y-axis per reaction vessel. Can be suppressed.

  Furthermore, according to the sample processing apparatus and the sample processing method of the present embodiment, in a series of processes of extraction, separation, and purification of biological molecules using magnetic beads, a reaction container (sample) is randomly processed as needed. In addition, a series of independent treatments for each reaction vessel (for example, disrupting cells and extracting biological molecules into the solution, separating the extracted biological molecules from the solution with magnetic beads) In other words, the treatment of washing the magnetic beads and eluting (purifying) the biological molecules adsorbed thereon with an eluent can be performed.

  Furthermore, in the reaction container of this example, the arrangement direction of wells in which various treatments are performed coincides with the movement direction of the reaction container, and the magnetic chip provided in the reaction container and the notch of the attaching / detaching mechanism (pressing plate) for the cover are provided. Since the portion is provided in alignment with the well arrangement direction, and the opening of these notches is also directed to the well arrangement direction, a reaction container that enables the above-described sample processing method to be performed is provided. be able to.

DESCRIPTION OF SYMBOLS 101 ... Mounting stand, 102 ... Sample rack, 103 ... Reagent rack, 104 ... Chip rack, 105 ... Nozzle mechanism, 106 ... Nozzle mechanism movement guide Z, 107 ... Nozzle mechanism movement guide Y, 108 ... Nozzle mechanism movement guide X, 109 ... Nozzle mechanism drive controller, 110 ... Reaction vessel, 111 ... Integrated stem mechanism, 112 ... Integrated stem mechanism drive controller, 113 ... Stem holder, 115 ... Guide groove, 116 ... Servo motor (actuator), 120 DESCRIPTION OF SYMBOLS ... Reaction container setting part, 130 ... Stem vertical movement mechanism, 131 ... Support member, 132 ... Reaction container drive control part, 133 ... Computer, 201 ... Stage, 202 ... Movable element, 203 ... Screw rod, 401 ... Stem, 402 ... Magnetic chip 403... Magnetic body 404. Flange portion 405. Cover 40 ... Flange part, 501 ... cover storage well, 502 ... magnetic chip storage well, 503 ... reaction well, 504 ... washing well (# 1), 505 ... washing well (# 2), 506 ... elution well, 507 ... upper pressure plate , 508, a lower pressing plate, 701, a biological sample to be treated, a solution containing a chaotropic agent or a surfactant, and 702, a magnetic bead.

Claims (3)

A reaction vessel used to extract a biological molecule from a biological sample using a reagent and magnetic beads, which has a box shape and is arranged so that the series of processes are performed on the box body. In a reaction vessel provided with a plurality of wells,
As the well, at least,
A reaction well supplied with a biological sample, a reagent for biological molecule extraction, a magnetic bead for biological molecule adsorption;
A magnetic chip storage well for storing a magnetic chip used for recovering the magnetic beads adsorbed with biological molecules;
A cover storage well for storing the cover of the magnetic chip,
Further, when the magnetic chip or the cover is selectively inserted into any one of these wells, the magnetic chip or the cover is moved eccentrically with respect to the well via the reaction container. Equipped with a detachable mechanism that engages and disengages by
The attachment / detachment mechanism includes an upper presser plate and a lower presser plate that are provided facing the upper part of the opening of the processing unit, and these presser plates are adapted to the outer diameters of the magnetic chip and the cover. There is a notch that accepts eccentric movement,
A reaction vessel characterized in that these notches are provided in alignment with the well arrangement direction, and the openings of these notches are also directed in the well arrangement direction. The reaction vessel according to claim 1,
The upper pressing plate and the lower pressing plate are shared by the magnetic chip and the cover, and each pressing plate has a curvature corresponding to the outer diameter of the magnetic chip and a curvature corresponding to the outer diameter of the cover. A reaction vessel in which notch elements are formed in a complex manner. The reaction vessel according to claim 1,
The upper pressing plate and the lower pressing plate are separately arranged for the magnetic chip and the cover, and the upper pressing plate and the lower pressing plate for the magnetic chip correspond to the outer diameter of the magnetic chip. A reaction vessel in which a notch having a curvature corresponding to the outer diameter of the cover is formed on the upper and lower pressing plates for the cover.

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