WO2011021640A1 - 温度サイクル装置 - Google Patents
温度サイクル装置 Download PDFInfo
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- WO2011021640A1 WO2011021640A1 PCT/JP2010/063926 JP2010063926W WO2011021640A1 WO 2011021640 A1 WO2011021640 A1 WO 2011021640A1 JP 2010063926 W JP2010063926 W JP 2010063926W WO 2011021640 A1 WO2011021640 A1 WO 2011021640A1
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- heat block
- temperature
- layer heat
- reaction
- reaction solution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/52—Heating or cooling apparatus; Heat insulating devices with provision for submitting samples to a predetermined sequence of different temperatures, e.g. for treating nucleic acid samples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/14—Process control and prevention of errors
- B01L2200/143—Quality control, feedback systems
- B01L2200/147—Employing temperature sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1805—Conductive heating, heat from thermostatted solids is conducted to receptacles, e.g. heating plates, blocks
- B01L2300/1827—Conductive heating, heat from thermostatted solids is conducted to receptacles, e.g. heating plates, blocks using resistive heater
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
- B01L3/5082—Test tubes per se
- B01L3/50825—Closing or opening means, corks, bungs
Definitions
- the present invention relates to a temperature cycle apparatus useful for carrying out a reaction of a biological sample used in the field of molecular biology research and the like, in particular, amplification of a nucleic acid.
- the nucleic acid amplification reaction is a method of repeating the synthesis of a nucleic acid complementary to and / or having the same sequence as a template nucleic acid, and includes the principles such as PCR method, LCR method, NASBA method, ICAN method, SDA method, and LAMP method.
- PCR method Several different methods have been developed. These have different characteristics and are used properly according to the purpose and the like, but the PCR method is used in most scenes.
- the PCR method uses a template nucleic acid, a pair of oligonucleotide primers, and a heat-resistant DNA polymerase-containing reaction solution as "denaturation of double-stranded nucleic acid”, “annealing of oligonucleotide primer to template nucleic acid”, and “complementary to template nucleic acid” It is carried out by subjecting it to a temperature cycle in which "synthetic nucleic acid synthesis" occurs sequentially.
- a reaction apparatus thermal cycler
- PCR is performed with a small amount (about 10 to 200 ⁇ L) of a reaction solution.
- a large-capacity reaction vessel When a large-capacity reaction vessel is used, if there is a temperature difference between the reaction vessel parts, water vapor condenses on the low-temperature part, for example, the upper wall of the reaction vessel that is not in contact with the reaction solution, and the amplification efficiency decreases. And cause variation in amplification efficiency between samples.
- an apparatus Japanese Patent Laid-Open No. 6-233670 having a mechanism for covering the upper surface of a reaction vessel containing a sample with a heated member or circulating air may be used.
- An apparatus for heating / cooling the entire reaction vessel Japanese Patent Publication No. 2000-511435 has been developed.
- the latter apparatus requires a complicated structure including a space for circulating air around the reaction vessel, a means for controlling and circulating the temperature of the air, and a reaction vessel excellent in heat conduction (for example, a glass vessel). ) Must be used.
- the former apparatus has a simple configuration including a heat block and a cover as main components, and a microtube or a microtiter plate widely used in the biochemical field can be used. However, since a gap is generated between the heat block and the cover, the temperature of this portion of the reaction vessel is lowered, and condensation of water vapor or the like can occur.
- reaction vessel depending on where the reaction vessel is installed, for example, a temperature difference occurs between the case where it is installed at the center of the heat block and the case where it is installed at the end of the heat block. Therefore, when PCR or an enzyme reaction is performed, there arises a problem that the reaction is uneven depending on the position where the reaction container is installed. Further, by covering the upper surface of the reaction vessel with a cover, a problem arises in the detection of the signal in the nucleic acid detection method (real-time PCR) in which the generation of a signal accompanying amplification of the target nucleic acid is detected during amplification.
- real-time PCR real-time PCR
- the inventors have a two-layer structure in which the heat block used for incubation of the reaction solution is composed of an upper layer heat block and a lower layer heat block, and the temperature of the upper layer heat block is adjusted to be higher than the temperature of the lower layer heat block. It was found that PCR can be carried out with good reproducibility because the condensation of water vapor or the like derived from the reaction solution is prevented.
- the present invention is a temperature cycle apparatus for incubating a reaction solution, and includes (1) a heat block for holding and heating a reaction vessel containing the reaction solution, and the heat block is a lower layer heat block And two layers of upper heat block, Furthermore, (2) Temperature control means for maintaining the temperature of the upper heat block higher than the temperature of the lower heat block when incubating the reaction liquid by independently controlling the temperature of the lower heat block and the temperature of the upper heat block.
- the present invention relates to a temperature cycle apparatus characterized by comprising.
- the present invention provides a temperature cycle apparatus provided with a heat block composed of two layers of an upper layer heat block and a lower layer heat block.
- the heat block is a structure in which a depression (well) that can hold a container (reaction container) containing a reaction solution to be incubated is formed.
- the well may be shaped according to the reaction container to be used, and is designed to hold, for example, a microtube and / or a microtiter plate (96 holes, 386 holes, etc.) and a capillary.
- As the reaction container one having a capacity of 10 to 2000 ⁇ L per reaction container held in one well is used.
- the reaction vessel is stored in the apparatus of the present invention with a cap or a seal.
- the heat block is preferably made of a material having excellent thermal conductivity, and usually a heat block made of a metal having good thermal conductivity (for example, aluminum, copper alloy, etc.) is used. Either a configuration in which the upper layer heat block and the lower layer heat block are made of the same material or a configuration in which different materials are used can be applied to the present invention.
- the heat block is formed in a structure in which the reaction vessel is held so as to penetrate the upper layer heat block and contact the lower layer heat block. Therefore, the thickness of the upper heat block is usually designed in the range of 0.5 to 1 cm, preferably in the range of 0.6 to 0.8 cm.
- the thickness of the lower layer heat block is not particularly limited as long as the reaction vessel can be accommodated when combined with the upper layer heat block.
- the heat block composed of two layers of an upper layer heat block and a lower layer heat block is substantially up to the upper end of the reaction vessel (for example, 70% or more of the total height of the reaction vessel, preferably 80% or more, more preferably (85% or more)
- a structure that can be stored in a well is preferable.
- the heat block includes temperature control means capable of independently controlling the temperatures of the upper layer heat block and the lower layer heat block.
- the temperature control means is a first temperature means for changing and maintaining the temperature of the lower heat block, a second temperature means for changing and maintaining the temperature of the upper heat block, and independently controlling these temperature means.
- control means for changing the temperature of both layers over time.
- the control means also includes a computer that stores information about the temperature profile to be executed and instructs the execution thereof, and a sensor that acquires actual temperature data of both layers of the heat block for temperature control. That is, the computer controls the temperatures of both layers of the heat block according to the profile based on the input temperature profile information and the actual temperature data of both layers of the heat block.
- both layers of the heat block can be obtained by connecting the first temperature means, the second temperature means and the sensor to an external computer via an appropriate interface without mounting a computer. And an apparatus capable of performing independent temperature control.
- a resistance temperature detector using a temperature change of electric resistance can be used as the sensor.
- the sensor is provided in each of the upper layer heat block and the lower layer heat block, and enables the temperature of both layers to be measured independently. Furthermore, a plurality of sensors may be arranged on both layers.
- a known heater or cooler can be used for the first temperature means and the second temperature means, but a Peltier element is preferably used.
- a heat sink or a cooling fan can be provided in the apparatus in order to promote heat dissipation during heat block cooling.
- the first temperature means is preferably provided inside the heat block so as to be flush with the lower surface or the lower surface of the lower heat block so as not to disturb the temperature control of the upper heat block.
- the 2nd temperature means is provided in the inside of a heat block so that it may become the upper surface or upper surface of an upper layer heat block so that temperature control of a lower layer heat block may not be prevented.
- the reaction solution is incubated by the lower layer heat block that substantially holds the lower part of the reaction vessel.
- the temperature control means incubates the reaction solution using the lower layer heat block using predetermined temperature profile information.
- a temperature control means controls the temperature of an upper layer heat block, and maintains it at a temperature higher than a lower layer heat block. That is, the upper layer heat block heats the upper part of the reaction vessel at a temperature higher than the incubation temperature while the reaction solution is incubated by the lower layer heat block.
- the upper layer heat block prevents the lower layer heat block from incubating the reaction solution according to the temperature profile. If not, both layers may be brought into contact to form a heat block. However, since both layers are generally made of a material with high thermal conductivity, when the two layers are brought into contact, the heat of the upper heat block is rapidly transferred to the lower heat block, and the temperature of the lower heat block is changed to the temperature. There is a possibility that it cannot be controlled according to the profile.
- the temperature cycle apparatus includes a heat conduction preventing means for preventing heat conduction between the upper layer heat block and the lower layer heat block.
- a heat conduction preventing means for preventing heat conduction between the upper layer heat block and the lower layer heat block.
- the heat conduction preventing means has a configuration in which a coating (for example, silicon, Teflon (registered trademark)) for preventing heat conduction is applied to the lower surface of the upper heat block and / or the upper surface of the lower heat block.
- a coating for example, silicon, Teflon (registered trademark)
- positions a heat insulating material for example, silicon
- the interval between the two layers is set so that the temperature of the region between the two layers of the reaction vessel is higher than the temperature at which condensation from the reaction solution does not occur (dew point temperature) or higher than the reaction solution.
- the interval between the two layers may be a minimum necessary interval that can ensure incubation according to the temperature profile by the lower layer heat block and can prevent condensation of the reaction liquid in the region between both layers of the reaction vessel.
- the total height is preferably 15% or less.
- the temperature of the upper heat block is set so that the temperature of the upper heat block is maintained higher than that of the lower heat block within the range that can ensure the incubation according to the temperature profile of the lower heat block while the reaction solution is incubated. That's fine. And it is not always necessary to change the temperature sequentially according to the temperature profile of the lower layer heat block.
- the temperature of the upper heat block is set to be 3 ° C. or higher, preferably 5 ° C. or higher, than the temperature of the lower heat block.
- the upper heat block is maintained at 60 to 120 ° C., preferably 105 to 120 ° C.
- the temperature of the lower heat block is 40 ° C. or lower
- the temperature of the upper heat block is An apparatus maintained at 45-60 ° C is exemplified.
- the upper limit of the temperature of the upper heat block is 115 to 120 ° C.
- the incubation temperature reaches a high temperature (for example, 70 ° C. or higher)
- the temperature at the top of the reaction vessel is the reaction solution in the reaction vessel. Therefore, the water or other components in the reaction liquid will not condense on the upper part of the reaction vessel. Therefore, the concentration of the components in the reaction solution is prevented from changing beyond that caused by the desired reaction, and the reaction occurs with good reproducibility.
- the lower layer heat block is covered with the temperature-controlled upper layer heat block, the temperature drop of the lower layer heat block due to the ambient temperature is reduced, the temperature of the entire lower layer heat block is made uniform, and the heat block Temperature unevenness due to a difference in position (for example, a difference in position between the central portion and the peripheral portion) is suppressed. Therefore, variation in reaction efficiency due to a difference in reaction position on the heat block can be prevented.
- the apparatus of the present invention does not necessarily require a cover having a temperature means for covering and heating the upper surface of the reaction vessel, which is provided in a conventional temperature cycle apparatus.
- a cover for preventing the reaction container cap from dropping off or the reaction container seal from peeling off may be provided.
- this cover may be provided with a temperature means for maintaining the temperature at the same level as the temperature of the upper heat block and a control means for the purpose of reinforcing or supplementing the function of the upper heat block in the present invention.
- the reaction container held in the well by the cover may be pressed downward to improve the adhesion between the lower part of the reaction container and the lower layer heat block so that the heat of the lower layer heat block can be easily transmitted to the reaction container. .
- a detection means for example, a spectrofluorometer
- a signal for example, fluorescence
- a light-transmitting cover or an opening for allowing the signal to pass through What is necessary is just to use the cover which provided.
- the apparatus of the present invention can be an apparatus in which each of the above-described components is housed in a housing.
- the apparatus optionally includes an interface used for connection to a computer or an external computer, an input means (for example, a keyboard) for inputting a temperature profile to be executed, a temperature profile,
- the display apparatus for example, liquid crystal display
- an optical device for monitoring a signal such as fluorescence emitted from the reaction solution may be mounted.
- the apparatus of the present invention prevents the dew condensation on the upper part of the reaction vessel containing the reaction solution, particularly the inner surface of the cap or seal, during the incubation of the reaction solution. Is not inhibited, and the signal can be easily detected. That is, the apparatus of the present invention is useful when it is provided with detection means for detecting the progress of the reaction in the reaction vessel optically and with time, particularly from above the reaction vessel.
- FIG. 2A is a top view
- FIG. 2B is a front view
- FIG. 2A is a top view
- FIG. 2B is a front view
- FIG. 2A is a top view
- FIG. 2B is a front view
- FIG. 2A is a top view
- FIG. 2B is a front view
- FIG. 2A is a top view
- FIG. 2B is a front view
- it is a figure which shows the structure of an upper layer heat block and a lower layer heat block.
- it is sectional drawing which shows the state which accommodated and hold
- FIG. 7A is a view showing a state in which a reaction vessel is held by an upper layer heat block and a lower layer heat block in the apparatus of the present invention, and FIG. 7A shows a configuration when both layers are brought into contact with each other, and FIG. The structure in the case of providing a material is shown.
- the apparatus of this invention it is the figure which showed the other structure which hold
- the temperature cycle apparatus includes a heat block 1 for heating the reaction vessel 4 as shown in FIG.
- a plurality of wells 10 are formed in the heat block 1 to store and hold the reaction vessel 4.
- the heat block 1 in this embodiment is a 96-hole heat block of 8 rows ⁇ 12 columns.
- the heat block 1 is composed of two layers, an upper layer heat block 2 and a lower layer heat block 3.
- the upper layer heat block 2 has a through hole 20 that constitutes a part of the well 10 of the heat block 1.
- the through hole 20 penetrates the upper heat block 2 up and down, is formed in a shape corresponding to the shape of the upper peripheral side surface of the reaction vessel 4, and the reaction vessel 4 can be inserted therethrough.
- the upper layer heat block 2 includes a heater 21 for changing and maintaining the temperature of the upper layer heat block 2, and a temperature sensor 22 for observing the temperature of the upper layer heat block 2.
- the heater 21 and the temperature sensor 22 are installed at a position suitable for temperature control of the upper heat block 2.
- the heaters 21 are installed at both ends in the width direction on the upper surface of the upper heat block 2.
- the temperature sensor 22 is installed at one end in the length direction on the upper surface of the upper heat block 2.
- the heater 21 and / or the temperature sensor 22 may be disposed on the side surface of the upper layer heat block 2 instead of being disposed on the upper surface of the upper layer heat block 2.
- a storage recess (not shown) for storing the heater 21 and / or the temperature sensor 22 is formed in the upper heat block 2, and these 21 and 22 are stored in the storage recess to You may install in.
- the heater 21 and the temperature sensor 22 are connected to the control unit 9. As a result, the temperature of the upper heat block 2 can be controlled to a desired temperature and can be changed over time.
- positioning holes 23 penetrating vertically are formed in the squares of the upper heat block 2 in order to mount and position the lower heat block 3.
- the lower layer heat block 3 is formed with a recess 30 constituting a part of the well 10 of the heat block 1.
- the recess 30 is formed in a shape corresponding to the shape of the lower part of the reaction vessel 4.
- the lower layer heat block 3 includes a Peltier element 31 for changing and maintaining the temperature of the lower layer heat block 3 and a temperature sensor 32 for observing the temperature of the lower layer heat block 3.
- the Peltier element 31 is disposed on the lower surface of the lower layer heat block 3, and the temperature sensor 32 is embedded in the center of the lower layer heat block 3.
- the Peltier element 31 and the temperature sensor 32 of the lower layer heat block 3 are connected to the control unit 9 similarly to the heater 21 and the temperature sensor 22 of the upper layer heat block 2. As a result, the temperature of the lower layer heat block 3 can be controlled and changed with time.
- the temperature cycle apparatus of this invention controls the temperature of the upper layer heat block 2 and the temperature of the lower layer heat block 3 independently by the said structure.
- the lower layer heat block 3 includes a positioning shaft 33 for positioning the upper layer heat block 2.
- the shaft 33 is provided in the square on the upper surface of the lower layer heat block 3.
- a spacer 6 is provided at the lower end of each shaft 33 to provide a space between the two layers when the upper heat block 2 is attached to the lower heat block 3.
- the upper heat block 2 is attached to the lower heat block 3 by arranging the upper heat block 2 on the lower heat block 3 so that each positioning shaft 33 is fitted in each positioning hole 23. .
- the upper layer heat block 2 is positioned with respect to the lower layer heat block 3. That is, as shown in FIG. 5, the through holes 20 of the corresponding upper layer heat block 2 are arranged directly above the respective recesses 30 formed in the lower layer heat block 3, and positioned so that they are in the same vertical line shape.
- the well 10 for holding the reaction vessel 4 is constituted by the through hole 20 and the recess 30.
- the spacer 6 is interposed between the upper layer heat block 2 and the lower layer heat block 3, a space 7 is provided between the layers 2 and 3.
- the heat block 1 is constituted by the upper layer heat block 2 and the lower layer heat block 3, and the reaction vessel 4 in which the reaction solution 5 is accommodated is accommodated in the well 10.
- FIG. 6 shows a state in which the reaction liquid 5 is accommodated in the well 10 of the heat block 1 configured as described above and the reaction container 4 with the cap 40 is accommodated and held.
- the reaction vessel 4 When the reaction vessel 4 is housed in the well 10, the lower portion of the reaction vessel 4 is fitted into the recess 30 of the lower layer heat block 3 and is in close contact therewith.
- the upper peripheral side surface of the reaction vessel 4 is in close contact with the through hole 20 of the upper heat block 2.
- the cap 40 of the reaction vessel 4 is not inserted into the through hole 20 and is positioned above the upper heat block 2.
- the reaction solution 5 in the reaction vessel 4 is located in the lower layer heat block 3 where the reaction solution 5 is incubated. Under the present circumstances, it is preferable that the liquid level 50 of the reaction liquid 5 exists in the same position as the upper surface of the lower layer heat block 3, or a position lower than the upper surface of the lower layer heat block 3, as FIG. 6 shows.
- the height of the space 7 between the two layers 2 and 3 prevents heat conduction between the two layers 2 and 3, ensures temperature control according to the temperature profile of the lower layer heat block 3, and the reaction vessel 4 during incubation. It is sufficient if the height is sufficient to prevent condensation at the site between the two layers 2 and 3. Further, in order to prevent heat conduction on the lower surface of the upper layer heat block 2 and / or the upper surface of the lower layer heat block 3, when a coating such as Teflon is applied, a space 7 is not provided between both layers 2 and 3, as shown in FIG. Both layers 2 and 3 may be brought into contact with each other.
- a heat insulating material 8 may be provided between the layers 2 and 3 in order to prevent heat conduction.
- the reaction vessel 4 may be stored in the heat block 1 up to almost the upper end of the peripheral side surface.
- the temperature cycle apparatus incubates the reaction solution 5 in the reaction vessel 4 while holding the reaction vessel 4 by the heat block 1 as described above. Specifically, the temperature cycle apparatus controls the temperature of the lower layer heat block 3 in accordance with the temperature profile input to the control unit, heats the entire lower part of the reaction vessel 4 by the lower layer heat block 3, and incubates the reaction solution 5. I do.
- the temperature cycle apparatus controls the temperature of the upper layer heat block 2 while the lower layer heat block 3 is incubating the reaction solution 5, and maintains the temperature higher than that of the lower layer heat block 3.
- the peripheral side surface is heated to prevent condensation from the reaction solution 5 in the reaction vessel 4.
- the temperature of the lower heat block 3 is set at 95 ° C. for 30 seconds in the thermal denaturation stage, 30 seconds at 55 ° C. in the annealing stage, and in the extension reaction stage. Set at 72 ° C for 1 minute.
- the temperature of the upper heat block 2 is set to be maintained at a constant temperature, for example, 105 ° C., higher than the upper limit value of the temperature of the lower heat block 3 (ie, 95 ° C.).
- a Peltier element may be provided in the upper layer heat block 2 instead of the heater 21 so that the temperature of the upper layer heat block 2 is sequentially changed according to the temperature change of the lower layer heat block 3.
- the temperature of the upper layer heat block 2 is set at 105 ° C. for 30 seconds at the thermal denaturation stage, at 65 ° 30 seconds at the annealing stage, and at the extension reaction stage. Set at 82 ° C for 1 minute. In this way, the temperature of the upper layer heat block 2 may be constantly maintained at a temperature higher than the temperature of the lower layer heat block 3 while being sequentially changed according to the temperature change of the lower layer heat block 3.
- FIGS. 9I to IV In order to confirm the reactivity of the apparatus of the present invention, an apparatus having a structure in which the upper heat block 2 is provided at the positions shown in FIGS. 9I to IV was used.
- I is the apparatus shown in FIG. 6 in the above embodiment of the present invention
- II is the reaction between the upper heat block 2 and the lower heat block 3 with the upper heat block 2 positioned at the top of the reaction vessel.
- III is an apparatus in which the upper heat block 2 does not hold the reaction container 4 and is disposed on the cap 40 of the reaction container 4
- IV is an upper heat block 2 Indicates a device that is not used.
- the amplification efficiency of each device was confirmed by a PCR amplification reaction with an amplification chain length of 8 kbp using lambda DNA (manufactured by Takara Bio Inc.) described below as a template.
- the reaction was performed using TaKaRa Taq Hot Start Version (manufactured by TAKARA BIO INC.) And a half amount of a general PCR reaction solution described in the instruction manual (total reaction solution volume 25 ⁇ L).
- total reaction solution volume 25 ⁇ L 0.5 ng / ⁇ L of lambda DNA 0.5 ⁇ L, primer F (SEQ ID NO: 1) and primer R (SEQ ID NO: 2) having a concentration of 10 pmol / ⁇ L were used at 0.5 ⁇ L each.
- the prepared reaction solution 5 was dispensed in 25 ⁇ L aliquots into 0.2 mL reaction tubes (0.2 mL 8-strip tube, individual flat caps, manufactured by Takara Bio Inc.).
- the reaction tube 4 into which the reaction solution 5 has been dispensed is set in each apparatus, and the temperature of the lower layer heat block 3 is heated at 94 ° C. for 1 minute, then at 94 ° C. for 30 seconds-65 ° C. for 10 minutes.
- the reaction was performed at a temperature setting of repeating 30 times.
- the temperature of the upper layer heat block 2 was 107 ° C.
- the schematic diagram of the 96-well plate used for reaction is shown in FIG. In the figure, the hatched location indicates the reaction position.
- FIG. 10 After completion of the reaction, the reaction liquids in rows A, H, and H in columns 1, 6, and 12 shown in FIG. 10 were extracted, and 1% agarose gel (Agarose L03 “TAKARA”, manufactured by Takara Bio Inc.) / TAE buffer. 3 ⁇ L of each reaction solution was applied. Using ⁇ -Hind III digest (manufactured by Takara Bio Inc.) as a marker, electrophoresis was performed with Mupid-2plus (manufactured by Advance Co.). The result is shown in FIG. That is, FIG. 11 is an electrophoretogram showing the PCR reactivity depending on the position of each device in the 96-well plate. In the figure, for example, the result after the reaction of the devices I to IV in the A row of one column is an electrophoretic photograph at the location of the device number below the location indicated as A-1. M represents an electrophoretic photograph of the marker.
- ⁇ -Hind III digest manufactured by Takara Bio Inc.
- Mupid-2plus manufactured by Advance Co
- the device II is slightly amplified in the D to H rows and the 6 columns G and H rows in the device II, the 12 columns F to H rows in the device III, and all the matrices in the device IV. Was observed or not amplified at all. These results are considered to be caused by the fact that condensation in the reaction vessel 4 could not be prevented or temperature unevenness occurred in the lower layer heat block 3.
- the apparatus I of the present invention gave good amplification results at all positions in the 96-well plate. This is considered to be due to the fact that the upper layer heat block 2 prevented condensation due to the reaction liquid in the reaction vessel and also suppressed the temperature unevenness of the lower layer heat block 3.
- the upper layer heat block 2 is prevented from changing the concentration of the reaction solution 5 beyond that caused by the desired reaction, and the nucleic acid amplification efficiency is reduced due to the change in the concentration of the reaction solution. Is preventing. Furthermore, the upper heat block 2 prevents temperature unevenness due to a difference in reaction position on the heat block 1, and prevents a decrease in nucleic acid amplification efficiency due to a difference in reaction position. From the above, it has been clarified that the temperature cycle apparatus of the present invention can perform stable and reproducible PCR in a 96-well plate.
- the temperature cycle apparatus of the present invention can be applied to enzyme reactions such as reverse transcription in addition to nucleic acid amplification.
- a temperature cycle apparatus in which moisture in the reaction solution and other components are not condensed in the reaction vessel, and temperature unevenness depending on the position where the reaction vessel is installed can be prevented.
- the apparatus of the present invention is very useful for carrying out the reaction of biological samples used in the field of molecular biology research and the like, in particular, amplification of nucleic acids.
- SEQ ID NO: 1 Primer F to amplify lambda DNA.
- SEQ ID NO: 2 Primer R to amplify lambda DNA.
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Abstract
Description
更に、
(2)下層ヒートブロックの温度と上層ヒートブロックの温度とをそれぞれ独立に制御して、反応液をインキュベートする際に、上層ヒートブロックの温度を下層ヒートブロックの温度より高く維持する温度制御手段を備えることを特徴とする温度サイクル装置に、関する。
本発明の装置の反応性を確認するため、上層ヒートブロック2を図9I~IVに示される位置に設けた構成の装置を用いた。尚、図9中、Iは本発明の上記実施例における図6に示す装置、IIは上層ヒートブロック2を反応容器最上部に位置させ、上層ヒートブロック2と下層ヒートブロック3との間に反応容器4の全高の30%の空間7を設けた装置、IIIは上層ヒートブロック2が反応容器4を保持せず、反応容器4のキャップ40上に配置された装置、IVは上層ヒートブロック2を使用しない装置を示す。
2 上層ヒートブロック
20 貫通孔
21 ヒーター
22 温度センサー
23 位置決め穴
3 下層ヒートブロック
30 凹部
31 ペルチェ素子
32 温度センサー
33 位置決めシャフト
4 反応容器
40 キャップ
5 反応液
50 液面
6 スペーサ
7 空間
8 断熱材
9 制御部
SEQ ID NO:2; Primer R to amplify lambda DNA.
Claims (6)
- 反応液をインキュベートするための温度サイクル装置であって、
(1)前記反応液を収容する反応容器を保持して加熱するためのヒートブロックを備え、前記ヒートブロックは、下層ヒートブロックと上層ヒートブロックとの2つの層で構成され、
更に、
(2)前記下層ヒートブロックの温度と前記上層ヒートブロックの温度とをそれぞれ独立に制御して、前記反応液をインキュベートする際に、前記上層ヒートブロックの温度を前記下層ヒートブロックの温度より高く維持する温度制御手段を備えることを特徴とする温度サイクル装置。 - 前記反応液は核酸を含有し、前記下層ヒートブロックは前記反応液をインキュベートし、前記上層ヒートブロックは前記核酸の増幅効率の低下を防止することを特徴とする請求項1記載の温度サイクル装置。
- 前記下層ヒートブロックと前記上層ヒートブロックとの間の熱伝導を妨げるための熱伝導防止手段を備えたことを特徴とする請求項1または請求項2に記載の温度サイクル装置。
- 前記熱伝導防止手段は、前記下層ヒートブロックと前記上層ヒートブロックとの間に設けられた空間であることを特徴とする請求項3に記載の温度サイクル装置。
- 前記温度制御手段は、前記下層ヒートブロックの温度を変化および維持するための第一温度手段と、前記上層ヒートブロックの温度を変化および維持するための第二温度手段とを備え、前記第一温度手段は前記下層ヒートブロックの下側に設けられ、前記第二温度手段は前記下層ヒートブロックの上側に設けられていることを特徴とする請求項1から請求項4のいずれか1項に記載の温度サイクル装置。
- 前記温度制御手段は、前記上層ヒートブロックの温度を前記下層ヒートブロックの温度より3℃以上高く維持することを特徴とする請求項1から請求項5のいずれか1項に記載の温度サイクル装置。
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JP2011527688A JPWO2011021640A1 (ja) | 2009-08-20 | 2010-08-18 | 温度サイクル装置 |
US13/389,479 US20120270309A1 (en) | 2009-08-20 | 2010-08-18 | Thermal cycler |
CN201080036270.8A CN102471746B (zh) | 2009-08-20 | 2010-08-18 | 温度循环装置 |
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WO2016117958A1 (ko) * | 2015-01-22 | 2016-07-28 | (주)미코바이오메드 | Dna 분석 장비용 온도 조절 장치 |
US20170058323A1 (en) * | 2011-02-04 | 2017-03-02 | Universal Bio Research Co., Ltd. | Automatic response/light measurement device and method therefor |
JP2017046675A (ja) * | 2015-09-04 | 2017-03-09 | パナソニックヘルスケアホールディングス株式会社 | 核酸増幅装置 |
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JPWO2011021640A1 (ja) | 2013-01-24 |
CN102471746A (zh) | 2012-05-23 |
CN102471746B (zh) | 2013-07-10 |
US20120270309A1 (en) | 2012-10-25 |
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