Patent Application
20230095969
This application is entitled to the benefit of Japanese Patent Application No. 2021-161806, filed on Sep. 30, 2021, the disclosure of which including the specification, drawings and abstract is incorporated herein by reference in its entirety.
The present invention relates to a liquid handling device and a liquid handling system.
In recent years, channel chips and other devices have been used to analyze cells, proteins, nucleic acids, and other substances. The advantage of channel chips is that the amount of reagents and samples required for analysis is small, and they are expected to be used in various applications such as clinical testing, food testing, and environmental testing.
For example, PTL 1 discloses a micro channel system including a large capacity reagent supply device storing reagent and buffer reservoirs, a rehydration cover with a small volume storing PCR reagents and other reagents, and a chip including channels. In the micro channel system disclosed in PTL 1, the chip, the reagent supply device, and the rehydration cover are constructed separately. This micro channel system disclosed in PTL 1 is used in the state where the reagent supply device and the rehydration cover are externally connected to the chip.
PTL 1
US Patent Application Publication No. 2014/0206073
However, the micro channel system disclosed in PTL 1 has a problem that the dead volume is increased due to the external connection of a rehydration cover with a small capacity, resulting in a large loss of the small amount of reagent stored in the rehydration cover.
An object of the present invention is to provide a liquid handling device and a liquid handling system that can reduce the waste of small quantities of reagent.
A liquid handling device according to an embodiment of the present invention includes: a cartridge including a first reservoir part in which a first reagent that is preservable in a non-frozen state is stored; and a channel chip including a second reservoir part in which a second reagent that should be preserved in a frozen state is stored, and a channel connected to the second reservoir part. The cartridge is attachable and detachable to and from the channel chip and the first reservoir part is connected to the channel when the cartridge is mounted in the channel chip.
A liquid handling system according to an embodiment of the present invention includes: the liquid handling device; and a liquid control device configured to control liquid flowing through the liquid handling device.
According to the present invention, it is possible to provide a liquid handling device and a liquid handling system that can reduce the waste of small quantities of reagent.
A liquid handling system according to an embodiment of the present invention is elaborated below with reference to the accompanying drawings. In the present embodiment, a liquid handling device and a liquid handling system for processing liquid are described.
As illustrated in
Liquid handling device 110 includes channel chip 111 and cartridge 112.
As illustrated in
The thickness of substrate 113 is not limited. For example, the thickness of substrate 113 is 1 mm to 10 mm. In addition, the material of substrate 113 is not limited.
For example, the material of substrate 113 may be appropriately selected from publicly known resins and glass. Examples of the material of substrate 113 include polyethylene terephthalate, polycarbonate, polymethylmethacrylate, polyvinyl chloride, polypropylene, polyether, polyethylene, polystyrene, cyclo-olefin resin, silicone resin and elastomer.
The thickness of film 114 is not limited as long as it can function as a diaphragm. For example, the thickness of film 114 is 30 μm to 300 μm. In addition, the material of film 114 is not limited as long as it can function as a diaphragm. For example, the material of film 114 may be appropriately selected from publicly known resins. Examples of the material of film 114 include polyethylene terephthalate, polycarbonate, polymethylmethacrylate, polyvinyl chloride, polypropylene, polyether, polyethylene, polystyrene, cyclo-olefin resin, silicone resin and elastomer. Film 114 is joined to substrate 113 by thermal welding, laser welding, adhesive agent, and the like, for example.
In the present embodiment, channel chip 111 includes first channel 115, a plurality of wells 116 each of which is connected to first channel 115, and a plurality of valves 117 each of which is disposed between well 116 and first channel 115. The number of well 116 and valve 117 is not limited, and is appropriately set in accordance with the use of channel chip 111.
Well 116 is a bottomed recess for introducing a sample such as blood, washing solution and the like, or discharging waste liquid. In the present embodiment, well 116 includes first well 116a to which first reservoir part 123 of cartridge 112 in which a first reagent that can be preserved in a non-frozen state is stored is connected, and second well (second reservoir part) 116b in which a second reagent that should be preserved in a frozen state is stored. In the present embodiment, each recess is composed of the through hole formed in substrate 113 and film 114 closing one opening of the through hole. The shapes and sizes of these recess are not limited, and may be appropriately set in accordance with the shape of connecting tube 127. The shape of these recess is a substantially columnar shape, for example. The width of these recess is approximately 2 mm, for example.
Connecting tube 127 of cartridge 112 is connected to first well 116a. On the other hand, connecting tube 127 is not connected to second well 116b. That is, in the present embodiment, it is preferable that the opening of second well 116b be open at the region other than the region where cartridge 112 is mounted. In this manner, also in the state where cartridge 112 is mounted, solution for dissolving the second reagent and the like can be injected to second well 116b, for example.
Second well 116b stores the second reagent that should be preserved in a frozen state, and is connected to first channel 115. The second reagent that should be preserved in a frozen state includes lyophilized reagent. That is, the second reagent is a reagent that is frozen when it is stored and transported, and is melted or dissolved when it is used. The second reagent is a reagent that is generally used in smaller quantities. Examples of the second reagent include antibodies, enzymes, aptamers, fluorescent reagents, peptides, DNA, and RNA.
It is preferable that the opening of second well 116b be sealed with second sealing member 128b during transportation, and that the sealing be released when it is used. The method of sealing the opening of second well 116b is not limited as long as the second reagent can be stored in second well 116b, and the opening of second well 116b may be sealed by publicly known methods.
First channel 115 is a channel through which liquid can move inside. A plurality of end portions of first channel 115 on one side is connected to first well 116a or second well 116b. The end portion of first channel 115 on the other side is connected to rotary membrane pump 118. First channel 115 is composed of the groove formed in substrate 113 and film 114 closing the opening of the groove. The cross-sectional area and cross-sectional shape of first channel 115 are not limited. In this specification, “cross-section of the channel” means the cross-section of the channel orthogonal to the liquid flow direction. The cross-sectional shape of the channel is a substantially rectangular shape with one side with a length (width and depth) of approximately several tens of micrometers, for example. The cross-sectional area of the channel may be or may not be constant in the liquid flow direction. In the present embodiment, the cross-sectional area of the channel is constant.
The plurality of valves 117 are membrane valves (diaphragm valves) disposed between first channel 115 and a plurality of first wells 116a or a plurality of second wells 116b, and configured to control the liquid flow therebetween. In the present embodiment, these valves are rotary membrane valves for which the opening and closing are controlled by the rotation of first rotary member 141. In the present embodiment, these valves are disposed on the circumference of a circle around first central axis CA1 at the center.
Rotary membrane pump 118 is a space with a substantially arc-shape (“C”-shape) in plan view formed between substrate 113 and film 114. One end of rotary membrane pump 118 is connected to first channel 115, and the other end of rotary membrane pump 118 is connected to second channel 119 opening to the outside. Second channel 119 is composed of the groove formed in substrate 113 and film 114 closing the opening of the groove. In the present embodiment, rotary membrane pump 118 is composed of the groove disposed in the bottom surface of substrate 113, and diaphragm 118a, which is a part of a flat and flexible film 114 facing the groove. Diaphragm 118a is disposed on the circumference of a circle around second central axis CA2 at the center. The cross-sectional shape of diaphragm 118a orthogonal to the above-mentioned circumference of a circle is not limited, but is a linear shape in the present embodiment. Note that rotary membrane pump 118 may be composed of the bottom surface of substrate 113, and diaphragm 118a facing the bottom surface while being separated from the bottom surface.
Diaphragm 118a of rotary membrane pump 118 makes contact with deflected substrate 113 when pressed by second protrusion 147 of second rotary member 142. For example, when second protrusion 147 slides and presses diaphragm 118a (counterclockwise, in
As illustrated in
Cartridge main body 121 is configured to be attachable and detachable to and from slide part 122, and slidable. Cartridge main body 121 includes a plurality of first reservoir parts 123. Note that in the present embodiment, cartridge main body 121 further includes first connecting tube 124, which is a part of connecting tube 127.
The plurality of first reservoir parts 123 stores the first reagent. The volumes of the plurality of first reservoir parts 123 are not limited. The volumes of the plurality of first reservoir parts 123 may be the same or different from each other. The number of the plurality of first reservoir parts 123 is not limited. In the present embodiment, thirteen first reservoir parts 123 are provided.
Through hole 125 configured to be connected to the channel (first channel 115) of channel chip 111 opens at the bottom portion of first reservoir part 123.
First reservoir part 123 stores the first reagent that can be preserved in a non-frozen state. The first reagent can be stored in a frozen state or a non-frozen state. In the present embodiment, the first reagent is not frozen, but is liquid. In the present embodiment, first reservoir part 123 is sealed with first sealing member 128a and thus the first reagent does not spill out when it is stored or transported. Examples of the first reagent include washing solution, buffer solution, water, diluted solution, dye solution (excluding fluorescent dye), and liquid containing magnetic beads.
The ratio of the volume of first reservoir part 123 to the volume of second well (second reservoir part) 116b is preferably 30:1 to 70:1, more preferably 10:1 to 20:1. To be more specific, for example, the volume of second well (second reservoir part) 116b is approximately 10 μL, and the volume of first reservoir part 123 is approximately 100 to 200 μL. The above-described cartridge 112 (cartridge main body 121) needs to be large to some degree to store the first reagent such as washing solution that needs to have some quantity, and ensure the handleability. As a result, the size of first reservoir part 123 also increases to some degree. If first reservoir part 123 stores only small quantities of reagent (second reagent) that is used only in small quantities, the reagent (the second reagent) that is used only in small quantities may adhere to the inner wall of first reservoir part 123 and thus may not be used. Therefore, the reagent to be stored in first reservoir part 123 needs to have some quantities. In this case, the quantity of the reagent to be input should be greater than the required quantity, and further the volume of first connecting tube 124 is wasted. In view of this, by reducing the volume of second well (second reservoir part) 116b relative to the volume of first reservoir part 123, the dead volume in second well (second reservoir part) 116b can be reduced, and thus the waste of the second reagent can be reduced.
First connecting tube 124 is a part of connecting tube 127 on the upstream side. The upstream end of first connecting tube 124 is connected to first reservoir part 123, and the downstream end is connected to second connecting tube 132.
It is preferable that the channel between second well (second reservoir part) 116b and first channel 115 be shorter than the channel between first reservoir part 123 and first channel 115. In this manner, the waste of the second reagent stored in second well (second reservoir part) 116b can be further reduced.
Slide part 122 includes packing 131 and second connecting tube 132, which is the downstream side of connecting tube 127, and thus slide part 122 is configured to be slidable with respect to cartridge main body 121 (see
Second connecting tube 132 is a part of connecting tube 127 on packing 131 side. First connecting tube 124 is connected to one end portion of second connecting tube 132, and packing 131 is disposed at the other end portion of it (see
Connecting tube 127 connects between first reservoir part 123 and packing 131 not only in the state where the channel between first reservoir part 123 and packing 131 is communicated, but also in the state where the channel between first reservoir part 123 and packing 131 is blocked. The material of connecting tube 127 is not limited as long as the connection between first reservoir part 123 and packing 131 can be maintained.
Examples of the material of connecting tube 127 include silicone, urethane, polytetrafluoroethylene (PTFE), and Tygon (registered trademark), which is a polyvinyl chloride resin.
By sliding cartridge main body 121 with respect to slide part 122, the channel between first reservoir part 123 and packing 131 can be opened and closed.
Liquid control device 120 includes first rotary member 141 and second rotary member 142 (see
As illustrated in
First protrusion 144 for closing valve 117 by pressing diaphragm 118a of valve 117, and first recess 145 for opening the diaphragm without pressing the diaphragm are disposed at the upper part of first body 143. First protrusion 144 and first recess 145 are disposed on the circumference of a circle around first central axis CA1 at the center. In the present embodiment, the shape of first protrusion 144 in plan view is an arc-shape (“C”-shape) corresponding to a part of the circle around first central axis CA1 at the center. The region where first protrusion 144 is not present on the circumference is first recess 145.
As illustrated in
Second protrusion 147 for operating rotary membrane pump 118 by pressing diaphragm 118a while sliding diaphragm 118a is provided at the upper part of second body 146. Second protrusion 147 is disposed on the circumference of a circle around second central axis CA2 at the center. The shape of second protrusion 147 is not limited as long as rotary membrane pump 118 can be appropriately activated. In the present embodiment, the shape of second protrusion 147 in plan view is an arc-shape corresponding to a part of the circle around second central axis CA2.
In liquid handling system 100 according to the present embodiment, first protrusion 144 of first rotary member 141 controls the opening and closing of the plurality of valves 117 of channel chip 111. To achieve this configuration, the plurality of valves 117 of channel chip 111 and first protrusion 144 of first rotary member 141 are disposed on the circumference of a first circle around first central axis CA1 at the center.
Likewise, in liquid handling system 100 according to the present embodiment, second protrusion 147 of second rotary member 142 controls the operation of rotary membrane pump 118 of channel chip 111. To achieve this configuration, rotary membrane pump 118 of channel chip 111 and second protrusion 147 of second rotary member 142 are disposed on the circumference of a second circle around second central axis CA2 at the center.
In liquid handling device 110 having the above-mentioned configuration, cartridge 112 is mounted to channel chip 111 when it is used. In this case, the first reagent that can be preserved in a non-frozen state is stored in first reservoir part 123 of cartridge 112. Note that in the case where the first reagent in a frozen state is stored in first reservoir part 123, cartridge 112 may be mounted in channel chip 111 in advance.
Liquid handling system 100 according to the present invention is used in the state where liquid handling device 110 with cartridge 112 mounted to channel chip 111 is mounted in liquid control device 120.
Liquid handling device 110 opens valve 117 corresponding to well 116 to be moved, by rotating first rotary member 141 around first central axis CA1 at the center. Next, the liquid in well 116 is moved to first channel 115 by rotating second rotary member 142 around second central axis CA2 at the center.
Next, valve 117 corresponding to well 116 to which the liquid in first channel 115 is to be moved is opened by rotating first rotary member 141 around first central axis CA1 at the center. Next, the liquid in first channel 115 is moved to well 116 to which the liquid in first channel 115 is to be moved by rotating second rotary member 142 around second central axis CA2 at the center.
As described above, various reactions are caused by moving the liquid by repeating the movement of the liquid (the first reagent or the second reagent) from well 116 to first channel 115, and the movement of the liquid (the first reagent or the second reagent) from first channel 115 to well 116.
In the above-described manner, with liquid handling device 110 according to the present embodiment, the second reagent that should be preserved in a frozen state is stored in the channel chip in advance, and thus the waste of the second reagent can be reduced.
The liquid handling device and the liquid handling system according to the present embodiment are useful for various uses such as laboratory tests, food tests and environment tests, for example.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-161806 | Sep 2021 | JP | national |
