WO2016135798A1 - 核酸分析装置 - Google Patents
核酸分析装置 Download PDFInfo
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- WO2016135798A1 WO2016135798A1 PCT/JP2015/054905 JP2015054905W WO2016135798A1 WO 2016135798 A1 WO2016135798 A1 WO 2016135798A1 JP 2015054905 W JP2015054905 W JP 2015054905W WO 2016135798 A1 WO2016135798 A1 WO 2016135798A1
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- temperature
- overshoot
- nucleic acid
- temperature control
- acid analyzer
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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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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6844—Nucleic acid amplification reactions
- C12Q1/686—Polymerase chain reaction [PCR]
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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
- B01L2300/06—Auxiliary integrated devices, integrated components
- B01L2300/0627—Sensor or part of a sensor is integrated
- B01L2300/0663—Whole 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
- B01L2300/1822—Conductive heating, heat from thermostatted solids is conducted to receptacles, e.g. heating plates, blocks using Peltier elements
Definitions
- the present invention relates to a nucleic acid analyzer for analyzing a biological sample by amplifying a nucleic acid contained in the biological sample.
- PCR Polymerase Chain Reaction
- the temperature of the reaction solution to be analyzed changes with a delay with respect to the temperature change of the temperature control block. Therefore, in many nucleic acid analyzers, for the purpose of accelerating the reaching of the reaction solution to the target temperature, for example, at the time of temperature increase, the temperature of the temperature control block is raised to the target temperature of the reaction solution temperature or overshooting. Has been done.
- Patent Document 1 describes that the best advantage can be obtained by using a temperature control block in combination with an optimized overshoot that is symmetric in both up and down ramps.
- Patent Document 2 describes a nucleic acid analyzer capable of random access that employs a configuration in which a reaction vessel is not covered and oil or the like is layered on a reaction solution to prevent evaporation.
- reaction vessel since water boils at 99.97 ° C. or higher under 1 atmosphere, the reaction vessel is not covered and the reaction solution is overlaid with oil or the like to prevent evaporation. There is a possibility that bubbles are generated during heating to the denaturation step and the analytical performance is lowered.
- the current nucleic acid analyzer cannot change the temperature range of the overshoot and the setting of the maintenance time, the analysis is always performed with the same setting at any step in a PCR temperature cycle. For the same reason, analysis is always performed with the same overshoot setting for any analysis item.
- the purpose of the present invention is to improve the temperature change rate of the reaction solution and shorten the analysis time while preventing the analysis performance from being deteriorated due to local overheating of the reaction solution.
- An object of the present invention is to provide a nucleic acid analyzer that sets and executes temperature control by an easy operation.
- An apparatus for realizing the present invention is a nucleic acid analyzer having a temperature adjustment unit that adjusts the temperature of a sample containing nucleic acid, and a temperature control unit that controls the temperature adjustment unit.
- a holding member that holds the container, a temperature control element that controls the temperature of the sample provided on the holding member, and a temperature sensor that measures the temperature of the holding member, and the temperature control unit includes the temperature sensor The temperature control unit is controlled so that the temperature measurement value with the passage of time to be measured becomes a trapezoid.
- the nucleic acid denaturation step carried out at high temperature, it is possible to prevent inactivation of the nucleic acid amplification enzyme and maintain analytical performance by suppressing excessive heating of the reaction solution due to overshoot.
- the nucleic acid denaturation step suppresses overheating of the reaction solution due to overshoot. Therefore, the generation of bubbles can be prevented and the analysis performance can be maintained.
- the temperature change rate of the reaction solution can be improved and the analysis time can be shortened.
- FIG. 3 is a cross-sectional view illustrating a configuration example between A-A ′ in FIG. 2.
- FIG. 3 is a cross-sectional view illustrating a configuration example between A-A ′ in FIG. 2.
- FIG. 4 is a schematic block diagram illustrating an example of a main configuration in terms of functions in the nucleic acid analyzer of FIGS. 2 and 3. It is the table
- FIG. 2 is a top view showing a configuration example of the main part of the nucleic acid analyzer according to Embodiment 1 of the present embodiment.
- FIG. 3 is a cross-sectional view illustrating a configuration example between AA ′ in FIG.
- 2 and 3 includes a temperature control unit, a carousel 2, a photometer 6, and a shielding plate 7.
- the temperature adjustment unit includes a temperature control block (holding member) 1 for holding a tube (reaction vessel) containing a reaction solution containing nucleic acid, and a Peltier element (temperature control element) 4 for adjusting the temperature of the temperature control block 1.
- the temperature sensor 5 monitors the temperature of the temperature control block 1.
- a plurality (12 in this example) of temperature control blocks 1 are arranged around the center axis of the carousel 2 along the outer periphery, and are driven to rotate about the rotation shaft 3.
- a Peltier element 4 is arranged between each of the temperature control blocks 1 and the carousel 2, and the temperature of the temperature control block 1 is monitored by a temperature sensor 5 mounted in the temperature control block 1 while monitoring the temperature. It is adjusted by controlling 4.
- the temperature of the plurality of temperature control blocks 1 can be adjusted independently. is there.
- Any other temperature control method may be used as long as temperature control for performing PCR is possible.
- an air incubator system in which temperature control is performed by changing the temperature of air can be used.
- a photometer 6 is disposed on the outer periphery of the carousel 2.
- two photometers 6 using light of different wavelengths are shown.
- one photometer 6 can be detected.
- three or more photometers 6 may be arranged. Since all the temperature control blocks 1 move on the same circumference by rotational drive, the relative positions of the photometer 6 and the temperature control block 1 when passing in front of the photometer 6 are the same in all the temperature control blocks 1. become.
- the plurality of temperature control blocks 1 are covered with a shielding plate 7 including the carousel 2 in order to reduce optical disturbance when analyzed by the photometer 6.
- a tube (reaction vessel) 10 containing a reaction solution (sample) in which a reagent or the like is mixed with nucleic acid is held by a temperature control block (holding member) 1.
- All temperature control blocks 1 are provided with an excitation light irradiation window 8 for receiving excitation light from the photometer 6 and a fluorescence detection window 9 for the photometer 1 to take in fluorescence.
- the excitation light irradiation window 8 is arranged on the lower surface side of the temperature control block 1 and the fluorescence detection window 9 is arranged on the side surface side of the temperature control block 1, the arrangement of the windows can be freely set according to the structure of the photometer. It is possible to set.
- the temperature rise is continued until the overshoot target temperature is reached.
- the overshoot target temperature is maintained for a predetermined time until the overshoot maintenance time is reached.
- the third treatment the temperature is continuously lowered until the target temperature of the reaction solution is reached.
- the overshoot setting that is, the overshoot target temperature and the maintenance time may be changed. Also, different overshoot setting patterns may be executed for two or more different analysis items. Further, it is desirable that the overshoot setting is directly input or externally input via USB, barcode, network or the like.
- FIG. 4 is a schematic block diagram showing an example of the main configuration in terms of the functions of the nucleic acid analyzer of FIGS. 2 and 3.
- a nucleic acid analyzer 31 shown in FIG. 4 includes a temperature control unit 32 that controls these temperatures in addition to the plurality of temperature control blocks 1 described above.
- the temperature control unit 32 is a part of the device control unit 33 that controls the nucleic acid analyzer.
- the temperature control unit 32 is mainly configured by a computer system or the like, and adjusts the temperature of each temperature control block 1 based on a predetermined processing sequence.
- the input unit 34 receives input of information from the outside to the nucleic acid analyzer.
- the information input method may be input in a file format via a barcode or USB, or may be input via a network.
- the storage / calculation unit 35 records the information input via the input unit 34 and transmits the information to the device control unit 33 as necessary. As for temperature control, recording of PCR temperature cycle parameters and overshoot settings, and calculations necessary for temperature control are performed.
- the display unit 36 displays information such as an apparatus state including an alarm, an analysis result, and a variable input screen necessary for control. [Temperature control method] Next, parameters for carrying out the PCR temperature cycle in the nucleic acid analyzer of this example will be described.
- FIG. 5 shows an example of PCR temperature cycle parameters.
- the parameters of the temperature cycle are roughly divided into stages. In this example, there are two stages, but it may be one or three or more. For each stage, the number of repetitions of that stage is set.
- Each stage is composed of one or more steps. A combination of temperature and maintenance time is set for each step.
- the temperature of the temperature control block 1 is controlled by the temperature control unit 32 so as to sequentially change from step 1 of the stage 1.
- the target temperature of the reaction solution and the target temperature of the temperature control block 1 for setting the reaction solution to the target temperature may not be the same. Therefore, the temperature of the temperature control block 1 may be controlled to a temperature calculated from the target temperature of the reaction solution using a predetermined correction formula.
- the overshoot control method described in this embodiment is a method in which the temperature control unit 32 controls the Peltier element (temperature control element) 4 that adjusts the temperature of the temperature control block 1.
- FIG. 6 is a diagram showing parameters necessary for setting the overshoot.
- the setting of overshooting is composed of two ranges: the overshooting temperature range and the overshooting maintaining time for maintaining the overshooting target temperature.
- the target temperature of overshoot is obtained by the sum of the target temperature of the reaction solution in the next step and the temperature range of overshoot.
- overshoot is defined as controlling the temperature of the temperature control block 1 to be higher than the original target temperature in order to accelerate the reaction solution to reach the target temperature in the next step.
- FIG. 7 shows the tube when the temperature of the temperature control block 1 is controlled by the temperature controller 32 so that the temperature of the reaction solution in the tube 1 reaches a preset target temperature of the reaction solution. It is a figure which shows an example of the temperature change of the reaction liquid in 10 and the temperature control block 1.
- FIG. 7 shows the tube when the temperature of the temperature control block 1 is controlled by the temperature controller 32 so that the temperature of the reaction solution in the tube 1 reaches a preset target temperature of the reaction solution.
- FIG. 7 shows an example of the temperature change of the reaction liquid in 10 and the temperature control block 1.
- FIG. 7 shows the tube when the temperature of the reaction solution reaches the set target temperature or the target temperature range set with reference to the target temperature, the control at that time is not overshoot control, but the PCR temperature cycle is not performed.
- the target temperature range is assumed to be the same as the temperature range used for the determination of reaching the target temperature in normal temperature control.
- FIG. 8 is a flowchart showing an example of processing contents when the overshoot control of the temperature control unit 32 shown in FIG. 4 is performed.
- the temperature of the temperature control unit holding the reaction solution is overshot as shown in FIG. 1C.
- step S101 the temperature rise is continued until the overshoot target temperature is reached (step S101).
- step S102 the overshoot target temperature is held for a predetermined time until the overshoot maintenance time is reached (step S102).
- step S103 the temperature lowering is continued until the target temperature of the reaction solution is reached (step S103).
- the temperature measurement value is controlled to take a trapezoidal waveform. At this time, it is desirable that the temperature gradients in the temperature increase in the first process and the temperature decrease in the third process are always constant.
- the nucleic acid denaturation step performed at a high temperature, by suppressing excessive heating of the reaction solution due to overshoot, the inactivation of the nucleic acid amplification enzyme can be prevented and the analytical performance can be maintained. If the reaction vessel is not provided with a lid, and the reaction solution is overlaid with oil, etc., to prevent evaporation, the nucleic acid denaturation step prevents overheating of the reaction solution due to overshoot, thus preventing bubbles. Analysis performance can be maintained.
- the overshoot including the process of maintaining the overshoot target temperature is referred to as a trapezoidal overshoot.
- Other general overshoots in which the temperature lowering is started without performing the temperature maintaining process after reaching the target temperature are referred to as saddle type overshoots. That is, the saddle type overshoot is also performed when the maintenance time at the overshoot target temperature is 0 in step S102 in the flowchart shown in FIG.
- FIG. 9 is a diagram showing an example of a temperature cycle for PCR when trapezoidal overshoot and saddle type overshoot are used in combination.
- the overshoot setting that is, the overshoot temperature and the overshoot maintenance time may be different.
- a trapezoidal overshoot setting with a small temperature range is applied, while the effect on them is not affected.
- a general vertical overshoot setting may be applied in order to improve the temperature change rate of the reaction solution.
- the reaction solution is changed when the temperature changes to a step where the influence of overheating is small. This can improve the temperature change rate and shorten the analysis time.
- FIG. 10 is a diagram showing an example of a temperature cycle for PCR in the case where the overshoot setting switching threshold is provided and the overshoot setting is changed.
- a threshold for switching overshoot setting is provided, and different overshoot settings may be applied depending on whether the target temperature is equal to or higher than the threshold and lower than the threshold.
- the temperature control unit 32 controls so as to execute saddle type overshoot when it is less than the threshold value, and execute trapezoidal overshoot when it is equal to or greater than the threshold value.
- FIG. 11 is a flowchart showing an example of processing contents when a threshold for switching overshoot setting is provided.
- a PCR temperature cycle, an overshoot setting, and a setting switching threshold are set in advance.
- the temperature control unit 32 confirms the target temperature Temp i and the maintenance time Time i of the next step. If this Temp i is lower than the current temperature, the temperature lowering is started. The temperature control method during the temperature drop will be described later. When Temp i is higher than the current temperature, Temp i is further compared with the overshoot setting switching threshold.
- the overshoot setting of the temperature range TempO 1 and the maintenance time TimeO 1 corresponding thereto is applied and executed.
- the overshoot setting of the temperature width TempO 2 and the maintenance time TimeO 2 corresponding thereto is applied and executed.
- the maintenance time TimeO2 is zero.
- the temperature is lowered to the target temperature Temp i determined by the PCR temperature cycle, and the temperature is maintained for the maintenance time Time i .
- the above processing is repeated until the temperature control determined by the PCR temperature cycle is completed. At this time, all the overshoot settings may be trapezoidal overshoots.
- Such a process of determining the setting of the overshoot applied for each step may be performed at the stage where the PCR temperature cycle is set before the analysis is started.
- two or more thresholds for overshoot setting switching may be set according to the number of overshoot settings.
- an overshoot setting pattern a combination of a plurality of different overshoot settings and an overshoot setting switching threshold is referred to as an overshoot setting pattern.
- the overshoot setting pattern may include at least one overshoot setting. In this case, the overshoot setting switching threshold value may not be included.
- FIG. 12 is a diagram showing an example of a temperature cycle for PCR when different overshoot setting patterns are applied to different analysis items.
- FIG. 12A is a diagram showing an example of a temperature cycle for PCR when the same saddle-type overshoot setting is applied in all steps.
- the temperature change rate of the reaction solution can be improved by applying such a setting.
- FIG. 12B is a diagram showing an example of a temperature cycle for PCR when different overshoot settings are applied at each step.
- the trapezoidal overshoot setting is applied when the temperature rises to the nucleic acid denaturation step
- the trapezoidal overshoot setting is applied when the temperature rises to the nucleic acid extension step.
- the trapezoidal overshoot setting is applied when the temperature rises to the nucleic acid extension step.
- FIG. 13 is a diagram showing an example of a temperature cycle for PCR when an overshoot limit temperature range or an upper limit value is provided.
- an overshoot limit temperature range is provided. For example, it may be determined based on the limit temperature at which the nucleic acid amplifying enzyme is deactivated in the nucleic acid denaturation step.
- the overshoot limit temperature range or the upper limit value may be determined based on the limit temperature at which the reaction proceeds normally in steps other than the nucleic acid denaturation step.
- FIG. 14 is a flowchart showing an example of processing contents when overshooting is performed when an overshooting limit temperature range or an upper limit value is provided.
- overshooting first, the overshoot target temperature of the next step is calculated and compared with the overshoot limit temperature range or the upper limit value.
- the overshoot target temperature is within the overshoot limit temperature range or below the upper limit value, the overshoot setting of the preset temperature width and maintenance time is applied and executed.
- the overshoot target temperature is outside the overshoot limit temperature range or above the upper limit value
- the overshoot target temperature is changed to be within the overshoot limit temperature, and at that time, the amount of heat equivalent to that before the change is changed. Calculate the resulting retention time and perform overshoot.
- an error may be displayed on the display unit 36. By displaying an error on the display unit 36, the user can be informed of the current overshoot setting.
- Such a process of determining the setting of the overshoot applied for each step may be performed at the stage where the PCR temperature cycle is set before the analysis is started.
- the overshoot setting temperature range or the upper limit value may be included as a constituent element of the above-described overshoot setting pattern in addition to the overshoot setting and the overshoot setting switching threshold.
- overshoot setting patterns are input by the user via the input unit 34.
- the overshoot setting pattern input via the input unit 34 is recorded in the storage / calculation unit 35.
- the user may select an overshoot setting pattern recorded in the storage / calculation unit 35 in advance. As described above, the user can freely change the overshoot setting pattern according to the analysis item.
- FIG. 15 is a flowchart showing an example of processing contents when the overshoot setting is automatically selected by the apparatus control unit 33.
- the overshoot setting pattern is input to the storage / calculation unit 35 in advance, and a different variable is given to each pattern.
- the analysis item name is input by the user via the input unit 34 in the preparation stage of analysis, if a variable corresponding to the analysis item is recorded, the corresponding variable is selected accordingly, and overshoot A setting pattern is selected.
- an input screen for an overshoot setting pattern is displayed and input by the user is requested.
- the analysis item name embedded in a barcode or the like attached to the bottle when the bottle containing the analysis reagent is installed on the nucleic acid analyzer 31 is input unit 34.
- the overshoot setting pattern may be automatically selected.
- the information input via the input unit 34 may be a variable other than the analysis item name.
- the overshoot setting pattern can be automatically changed according to the analysis item.
- Control method of undershoot The method of changing the overshoot setting has been described above. Similarly, when undershooting is performed when the temperature is lowered, two parameters, the undershoot temperature range and the undershoot maintenance time, are set as the undershoot setting. Provide. The target temperature of the undershoot is obtained by the difference between the target temperature of the reaction liquid in the next step and the temperature range of the undershoot.
- FIG. 16 is a flowchart showing an example of processing contents when the temperature control unit 32 shown in FIG. 4 performs undershoot control.
- step S104 the temperature lowering is continued until the undershoot target temperature is reached.
- the undershoot target temperature is held for a predetermined time until the undershoot maintenance time is reached (step S105).
- the temperature is increased until the target temperature of the reaction solution is reached (step S106).
- the temperature measurement value is controlled to take a trapezoidal waveform. At this time, it is desirable that the temperature gradients in the temperature decrease in the first process and the temperature increase in the third process are always constant.
- undershoot settings may be switched for each analysis item in the same manner as overshoot settings.
- a general saddle-shaped undershoot can be adopted for analysis items with high reaction specificity, and the temperature change rate of the reaction solution can be improved.
- the temperature change rate of the reaction solution can be improved.
- by reducing the temperature range of the undershoot excessive cooling of the reaction solution is suppressed, and non-specific reaction progresses. Can be prevented.
- the undershoot setting may be handled in combination with the above-described overshoot setting pattern.
- each of the nucleic acid analyzers having a plurality of temperature control blocks 1 has been described above.
- each of the nucleic acid analyzers having a plurality of temperature control blocks 1 has been described above.
- different temperature overshoot and undershoot can be applied to each temperature control block 1. That is, when testing different analysis items in each temperature control block, it is possible to apply optimal overshoot and undershoot settings to each analysis item.
- this invention is not limited to the above-mentioned Example, Various modifications are included.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
- each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
- Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
- Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, or an SSD (Solid State Drive).
- control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.
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Abstract
Description
(実施の形態1)〔核酸分析装置の主要部の構成〕
図2は、本実施例の形態1による核酸分析装置において、その主要部の構成例を示す上面図である。図3は、図2のA-A’間の構成例を示す断面図である。
〔温度制御方法〕
次に、本実施例の核酸分析装置で、PCR用温度サイクルを実施するためのパラメータについて説明する。
〔オーバーシュート制御方法〕
次に、本実施例の核酸分析装置で実施するオーバーシュートの制御方法と、オーバーシュートの設定について説明する。本実施例で説明するオーバーシュートの制御方法は、温度制御部32が温調ブロック1の温度を調節するペルチェ素子(温調素子)4に対して制御する方法である。
〔アンダーシュートの制御方法〕
以上、オーバーシュートの設定を変更する方法について述べたが、同様に、降温時にアンダーシュートを実施する場合、アンダーシュートの設定として、アンダーシュートの温度幅と、アンダーシュートの維持時間の2つのパラメータを設ける。アンダーシュートの目標温度は、次ステップの反応液の目標温度と、アンダーシュートの温度幅の差で求められる。
2 カローセル
3 回転軸
4 ペルチェ素子
5 温度センサ
6 光度計
7 遮蔽板
8 励起光照射窓
9 蛍光検出窓
10 チューブ
31,核酸分析装置
32 温度制御部
33 装置制御部
34 入力部
35 記憶・演算部
36 表示部
Claims (13)
- 核酸を含む試料を温度調節する温度調節ユニットと、
前記温度調節ユニットを制御する温度制御部と、を有する核酸分析装置であって、
当該温度調節ユニットは、試料を含む容器を保持する保持部材と、前記保持部材に設けられた試料を温調する温調素子と、前記保持部材の温度を測定する温度センサを備え、
前記温度制御部は、前記温度センサにて測定される時間経過に伴う温度測定値が台形になるように、前記温度調節ユニットを制御していることを特徴とする核酸分析装置。 - 請求項1記載の核酸分析装置において、
前記温度制御部は、PCR用温度サイクル中の各設定温度におけるオーバーシュート制限温度範囲または上限値を備え、
前記温度制御部は反応液の次ステップのオーバーシュート目標温度が、前記オーバーシュート制限温度範囲内または上限値以下である場合は、所定のオーバーシュート設定でオーバーシュートを実施し、前記オーバーシュート制限温度範囲外または上限値以上である場合には、制限温度範囲内または上限値以下となるように制御するプログラムを実行することを特徴とする核酸分析装置。 - 請求項2記載の核酸分析装置において、
前記温度制御部は、PCR用温度サイクル中の各設定温度における前記オーバーシュート制限温度範囲または上限値を、予め入力する入力部を有することを特徴とする核酸分析装置。 - 請求項1記載の核酸分析装置において、
前記温度制御部が、PCR用温度の1サイクル中の各ステップの設定温度につき、オーバーシュートの温度幅とオーバーシュートの維持時間の2つのパラメータから構成される、オーバーシュートの設定を適用することを特徴とする核酸分析装置。 - 請求項4記載の核酸分析装置において、
さらに、複数の台形オーバーシュートの設定と、台形オーバーシュートのパラメータの切り替えの閾値が温度制御部に入力される入力部を有し、
前記温度制御部は、前記温度センサで測定された温度が、前記閾値より高温である場合は一方の台形オーバーシュートの設定を適用し、前記温度センサで測定された温度が、前記閾値より低温である場合は他方の台形オーバーシュートの設定を適用するように構成されていることを特徴とする核酸分析装置。 - 請求項5記載の核酸分析装置において、
さらに、オーバーシュートの設定を記録するための記憶・演算部を備え、
前記オーバーシュートの設定が、前記入力部を介して外部から入力され、一旦記憶・演算部に記録された後、分析開始前に選択され温度制御部によって実行されることを特徴とする核酸分析装置。 - 請求項6記載の核酸分析装置において、
記憶・演算部は、前記オーバーシュートの設定を、に予め異なる複数のパターンとして記録し、前記パターンにはそれぞれ異なる変数が与えられ、
分析開始前に、前記変数が選択されることによって、それに対応するオーバーシュートの設定のパターンを温度制御部に伝達し、実行することを特徴とする核酸分析装置。 - 請求項4記載の核酸分析装置において、
前記温度制御部は、アンダーシュートの温度幅と、維持時間の2つのパラメータから構成されるアンダーシュートの設定を行い、さらに異なる2つ以上の分析項目で、異なるアンダーシュートの設定のパターンを実行することを特徴とする核酸分析装置。 - 請求項4記載の核酸分析装置において、
前記温度調節ユニットを複数有し、それぞれが独立に温度調節することを特徴とする核酸分析装置。 - オーバーシュートの設定は、オーバーシュートの温度幅と、維持時間の2つのパラメータから構成されるものであって、
温度調節ユニットの温度をオーバーシュートさせる場合、
オーバーシュート目標温度に到達するまで昇温を続ける第1処理と、
当該温度に到達したら、オーバーシュートの維持時間に達するまでオーバーシュート目標温度で所定の時間保持する第2処理と、
反応液の目標温度に到達するまで降温を続ける第3処理と、
を実行するものであって、
温度測定値が台形の波形をとるように制御することを特徴とする温度制御方法。 - 請求項10記載の温度制御方法において、
PCR用温度サイクル中の各設定温度につき、前記オーバーシュートの設定を変化させることを特徴とする温度制御方法。 - 請求項11記載の温度制御方法において、
異なる2つ以上の分析項目で、異なるオーバーシュートの設定のパターンが実行されることを特徴とする温度制御方法。 - 請求項12記載の温度制御方法において、
前記オーバーシュートの設定が、予め装置外部から入力され、分析開始前に選択され実行されることを特徴とする温度制御方法。
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