EP1305115B1 - Vorrichtung zur pcr-amplifizierung von ziel-dna-sequenzen - Google Patents

Vorrichtung zur pcr-amplifizierung von ziel-dna-sequenzen Download PDF

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EP1305115B1
EP1305115B1 EP01956628A EP01956628A EP1305115B1 EP 1305115 B1 EP1305115 B1 EP 1305115B1 EP 01956628 A EP01956628 A EP 01956628A EP 01956628 A EP01956628 A EP 01956628A EP 1305115 B1 EP1305115 B1 EP 1305115B1
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cartridge
reaction chambers
reservoir
reaction
fluid
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EP1305115A1 (de
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Gabriel Festoc
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Pall Genedisc Technologies SAS
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Pall Genedisc Technologies SAS
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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
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/50273—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means or forces applied to move the fluids
    • 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
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5025—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures for parallel transport of multiple samples
    • 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
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • 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
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502715—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
    • 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
    • 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
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0803—Disc shape
    • 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
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • 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
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
    • B01L2300/0864—Configuration of multiple channels and/or chambers in a single devices comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
    • B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B01L2400/049—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics vacuum
    • 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
    • B01L7/525—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 with physical movement of samples between temperature zones
    • B01L7/5255—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 with physical movement of samples between temperature zones by moving sample containers
    • 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
    • B01L7/54—Heating or cooling apparatus; Heat insulating devices using spatial temperature gradients

Definitions

  • the present invention relates to the field of genetics.
  • the present invention relates to a device for the amplification of target nucleic sequences, reaction cartridges usable in this device, and modes of use of this device.
  • the object of the present invention is in particular to enable the detection and, where appropriate, the quantification in real time of target nucleic acid sequences in one or more samples.
  • Detection of target nucleic acid sequences is an increasingly popular technique in many fields, and the range of applications of this technique is expected to expand as it becomes more reliable, cost-effective and more reliable. fast.
  • the detection of certain nucleic acid sequences in certain cases allows a reliable and rapid diagnosis of viral or bacterial infections.
  • the detection of certain genetic peculiarities can make it possible to identify susceptibilities to certain diseases, or to establish an early diagnosis of genetic or neoplastic diseases.
  • the detection of target nucleic sequences is also used in the food industry, in particular to ensure the traceability of products, to detect the presence of genetically modified organisms and to identify them, or to carry out a health control of food.
  • Nucleic acid-based detection methods almost invariably involve a molecular hybridization reaction between a target nucleic acid sequence and one or more sequences nucleic acid complementary to said target sequence.
  • These methods have many variants such as the techniques known to those skilled in the art under the terms "transfer techniques” ( blot, dot blot , Southem blot, Restriction Fragment Length Polymorphism, etc.), or like the miniaturized systems on which the complementary sequences of the target sequences ("biochips”) are prefixed.
  • transfer techniques blot, dot blot , Southem blot, Restriction Fragment Length Polymorphism, etc.
  • the complementary nucleic sequences are generally called probes.
  • Another variant which may constitute in itself the basis of a diagnostic method or be only an additional step in one of the techniques mentioned above (in particular to increase the concentration of the target sequence and therefore the sensitivity of the diagnosis), consists in amplifying the targeted nucleic acid sequence.
  • PCR Polymerase Chain Reaction
  • PCR Polymerase Chain Reaction
  • PCR Polymerase Chain Reaction
  • the PCR reactions involve a repetition of cycles, the number of which generally ranges from 20 to 50, and which are each composed of three successive phases, namely: denaturation, hybridization, elongation.
  • the first phase corresponds to the transformation of the double-stranded nucleic acids into single-stranded nucleic acids
  • the second phase to the molecular hybridization between the target sequence and the complementary primers of said sequence
  • the third phase to the elongation of the hybridized complementary primers. to the target sequence, by a DNA polymerase.
  • phase are carried out at specific temperatures: generally 95 ° C for denaturation, 72 ° C for elongation, and between 30 ° C and 65 ° C for hybridization, depending on the hybridization temperature (Tm) of the primers used. It is also possible to perform the hybridization and elongation steps at the same temperature (generally 60 ° C).
  • a PCR reaction therefore consists of a series of repetitive thermal cycles in which the number of target DNA molecules serving as template is theoretically doubled at each cycle.
  • X n-1 is the amount of product obtained in the previous cycle, and n the yield of the PCR at cycle n (0 ⁇ r n ⁇ 1).
  • the yield r decreases during the PCR reaction, because of several factors, such as a limiting amount of at least one of the reagents necessary for the amplification, the inactivation of the polymerase by repeated passages. at 95 ° C, or its inhibition by the pyrophosphates produced by the reaction.
  • the curve presenting the quantity of product, in logarithmic scale, as a function of the number of cycles, and a slope line (1 + r) and which intersects the y-axis with a value equal to the logarithm of the initial concentration.
  • the real-time measurement of the quantity of product obtained can therefore make it possible to know the initial matrix concentration, which is particularly useful in a large number of applications, for example for measuring the viral load of a patient, or again to know the variability of a transcriptome.
  • the PCRs involve reaction volumes ranging from 2 to 50 ⁇ l and are carried out in tubes, microtubes, capillaries or systems known to those skilled in the art under the term "microplates" (in fact sets of micro tubes secured).
  • microplates in fact sets of micro tubes secured.
  • Each batch of tubes or equivalent containers must be successively brought to the three temperatures corresponding to the different phases of the PCR, and as many times as desired cycles.
  • oligonucleotides complementary to said sequence are based on oligonucleotides complementary to said sequence, and linked to couples of fluorophore or fluorophore / quencher moieties, such that hybridization of the probe to its target and subsequent amplification cycles result, depending on the case an increase or decrease in the total fluorescence of the mixture, in proportion to the amplification of the target sequence.
  • This method combines the DNA polymerase and 5 ⁇ 3 'nuclease activities of Taq polymerase during PCR. Its principle is as follows: in addition to the two primers of sequence complementary to that of the target to be quantified, a probe, called probe reporter, is added in the reaction medium. It has the ability to hybridize to the target in the body of the amplified sequence, but can not be amplified itself. Indeed, a phosphoryl group added to the 3 'end of the probe prevents its extension by Taq polymerase. A fluorescein derivative and a rhodamine derivative are incorporated into the probe at the 5 'and 3' ends, respectively. The probe is small, so the rhodamine derivative, located near the fluorescein, absorbs the energy emitted by the fluorescein subjected to a source of excitation ( quenching phenomenon).
  • the Taq DNA polymerase attacks the probe by its 5 'activity. nuclease, releasing the quencher group and thereby restoring the fluorescence remission.
  • the intensity of the fluorescence emitted is then proportional to the quantity of PCR products formed, which makes it possible to obtain a quantitative result.
  • the fluorescence emitted is proportional to the number of starting target molecules. The kinetics of fluorescence development can be monitored in real time during the amplification reaction.
  • This technique has the advantage of being easily automatable.
  • An apparatus for carrying out this technique the ABI Prism 7700 TM , is marketed by Perkin-Elmer.
  • This device combines a thermocycler and a fluorimeter. It is able to detect the increase in fluorescence generated during a quantification test according to the TaqMan TM process, thanks to optical fibers located below each tube and connected to a CCD camera that detects, in real time , the signal emitted by the fluorescent groups released during the PCR.
  • the quantitative data are derived from the determination of the cycle at which the signal of the amplification product reaches a certain threshold determined by the user.
  • this number of cycles is proportional to the amount of initial material (Gibson, Heid et al., 1996, Heid, Stevens et al., 1996, Williams, Giles et al., 1998).
  • the objective of the present invention is to propose such a system which makes it possible to considerably reduce the number of manipulations required to implement an amplification method on a plurality of target sequences and, consequently, to reduce the time required. necessary for this operation.
  • Another object of the present invention is to provide such a system which minimizes the risk of contamination from one container to another.
  • Another objective of the present invention is to propose such a system which reduces the volumes of reagents involved and therefore the costs.
  • Another objective of the present invention is to propose such a system which optimizes a homogeneous distribution in volume and in concentration of the reagents necessary for the PCR in the containers.
  • Another objective is to provide all potential users, including hospitals, medical laboratories, agribusiness and health control laboratories, an easy-to-use and easy-to-use device to routine quantified nucleic acid amplifications in real time.
  • each zone of the platen can be homogeneous or, where appropriate, this temperature can vary according to a gradient
  • reaction mixture Several types of molecular biology reactions require placing the reaction mixture at different temperatures as a function of time. This is the case, for example, when it is desired to inactivate an enzyme after using it (for example, a restriction nuclease), or to test the stability of a complex. In the latter case, it is conceivable to place a complex (for example, an antigen / antibody complex, or receptor / ligand), one of which is coupled to a fluorophore and the other to a quencher of fluorescence, one of the reaction chambers of the device. The stage is then programmed to present several temperatures in increasing order, possibly in the form of a gradient.
  • a complex for example, an antigen / antibody complex, or receptor / ligand
  • the stability of the complex is then tested by moving the cartridge on the plate, so that the temperature of the reaction chamber rises gradually, and observing the increase in fluorescence, using excitation means measurement of the fluorescence placed opposite the reaction chamber.
  • the increase in fluorescence then reflects the dissociation of the complex.
  • the device of the invention is particularly suitable for reactions requiring a cyclic variation in the temperature of the reaction chambers, which is the case for certain nucleic acid amplification reactions, for example for polymerase chain reaction (PCR), or for the ligase chain reaction (LCR).
  • PCR polymerase chain reaction
  • LCR ligase chain reaction
  • Such a system according to the invention is less complex than the systems of the prior art, insofar as the temperatures required for the cycles of the chain amplification are provided by distinct zones of constant temperatures and not by a plate of which one must vary the temperature.
  • thermo-dependent chain amplification reactions require the passage of samples at at least two temperatures.
  • the CSF requires at each cycle a phase at about 95 ° C to denature the target DNA, then a phase between 55 and 65 ° C (depending on the Tm probes) to give rise to hybridization / ligation .
  • each cycle generally breaks down into three phases, namely denaturation at about 95 ° C, hybridization whose temperature depends on the Tm of the probes, and elongation, usually performed at 72 ° C. .
  • nucleic acids to be amplified it is possible to dispense, from a reservoir, a fluid containing a sample of nucleic acids to be analyzed and the reagents necessary for the PCR in a plurality of reaction chambers containing specific primers of target sequences. nucleic acids to be amplified, and to allow the amplification process by subjecting the contents of the chambers successively to different temperatures (namely those necessary for denaturation, hybridization and elongation) a multitude of times through a movement relative between the cartridge including said reaction chambers and said heating platen having two or three distinct zones that can be brought to different temperatures.
  • the reaction chambers (13) may contain reagents necessary for a real-time PCR reaction other than the primers mentioned above.
  • the reaction chambers also comprise, in addition to the primers, one or more specific probe (s) of the sequence to be amplified.
  • the distribution of the probes in the reaction chambers may also be such that certain chambers contain probes specific for the sequences to be amplified and other chambers comprise control probes, not recognizing a priori the sequence to be amplified. These probes may be labeled and, if several probes are present in the same reaction chamber (for example a probe specific for the sequence to be amplified and a control probe), these probes will preferably be labeled with different fluorophores.
  • additional reagents such as dNTPs or salts, are initially deposited in the reaction chambers. These reagents will then be absent, or present in a smaller amount, in the fluid deposited in the reservoir (11). In the extreme case, all the reagents necessary for the PCR reaction, with the exception of the matrix, are deposited in the reaction chambers (13), and the fluid deposited in the reservoir (11) will then comprise only the sample. DNA (or RNA) to amplify.
  • the variants described above assume that several reactions are carried out in parallel, with different primers and / or probes, on the same sample. It is therefore the characterization of a single sample (or a few samples if the reservoir is divided into a few sub-reservoirs) according to several criteria. In some applications, on the contrary, it is desired to characterize a multitude of samples according to a single criterion or a small number of criteria. This is the case for example in research, when it is desired to screen a library of phages or bacteria for the presence of a given gene. In this case, it is necessary to carry out a PCR on a large number of samples, from a given pair of primers.
  • the device of the invention is also suitable for this type of manipulation.
  • the samples are deposited in the reaction chambers (13).
  • the primers can be introduced into the fluid deposited in the reservoir (11), along with the other reagents necessary for the PCR.
  • this configuration does not exclude that certain reagents other than the sample to be analyzed are pre-deposited in the reaction chambers (13).
  • each reagent deposited in the reaction chambers (13) can be advantageously deposited there by a simple liquid deposit, followed by drying.
  • the arrival of the fluid from the reservoir (11) then allows the re-solution of these reagents.
  • the amount of each reagent deposited is calculated as a function of the volume of fluid that will penetrate into each reaction chamber (13), so that the reactivation of the reagents will result in the desired final concentration for each of them.
  • Cartridges as described above, in which at least a portion of the reaction chambers (13) comprise reagents which have been loaded therein by a liquid deposit, followed by drying, so that these reagents are returned to solution by the arrival of a fluid in these reaction chambers, are also an integral part of the invention.
  • the device described above has the advantage of allowing a concomitant filling of all the reaction chambers, which reduces the preparation time and the risks of contamination from one chamber to another.
  • This device also has the advantage of being able to be miniaturized and to involve the use of smaller volumes of reagents than in the state of the art.
  • the invention makes it possible to accelerate PCR cycles, since it is not necessary to perform the various phases (denaturation, hybridization, elongation). to vary the temperature of the heating stage or the atmosphere as in the state of the art, the relative movement between the cartridge and the platen to submit quickly and successively the contents of each of the chambers reaction at three distinct temperatures dedicated to each of these phases.
  • the use of small reaction volumes, and a thin floor for the cartridge (1), also limit the thermal inertia at the reaction chambers, and therefore contribute to the speed of the reaction.
  • the invention also relates to a device for thermo-dependent chain amplification of target nucleic acid sequences, measured in real time, characterized in that it comprises the same elements as any of the devices described herein. above, and further comprising optical means (5) for excitation / measurement of fluorescence, arranged to excite and measure at each cycle the fluorescence of the contents of the reaction chambers.
  • reaction cartridge (1) One of the particularly original elements of the devices described above is the element indifferently called plate or reaction cartridge (1).
  • This element may be recyclable or, preferably, consumable, and constitutes in itself an aspect of the present invention.
  • the invention also relates to a reaction cartridge according to claim 1.
  • DE-A-198 52835 discloses a reaction cartridge of the same type.
  • the diameter of the channels will preferably be chosen small enough not to allow a gravity distribution of the fluid present in the tank in the reaction chambers, so as to avoid non-reproducible filling of these chambers. This diameter will thus preferably be less than or equal to approximately 0.2 mm. With regard to this diameter, it will be noted that the section of the channels will preferably be circular but that it may also be of any other shape and in particular polygonal, the "diameter" of the channels then aiming at their greatest width in section.
  • the reservoir intended to receive the sample of nucleic acids and the reagents necessary for the PCR may have a variable capacity, for example between about 0.1 ml and about 1 ml.
  • the cartridge preferably comprises between about 20 and about 500 reaction chambers and, more preferably, between 60 and 100 reaction chambers.
  • these rooms may also vary according to the embodiments.
  • these chambers have a volume of between approximately 0.2 and 50 ⁇ l, preferably between 1 ⁇ l and 10 ⁇ l.
  • the junction between the channels (12) and the reservoir (11) is at the periphery of the reservoir, and the bottom of said reservoir is convex, so as to ensure the distribution of a fluid contained in the tank at the entrance of the channels.
  • a cartridge according to the invention can have multiple forms. However, according to a preferred variant of the invention, this cartridge has a circular shape.
  • the reservoir is provided substantially in the center of the cartridge, the reaction chambers being distributed in a circle around the reservoir, and the channels connecting the reservoir to the chambers being provided essentially radially.
  • Such an architecture allows to optimize the filling of the reaction chambers from the central tank.
  • the bottom of the tank (11) is conical.
  • reaction chambers are provided relative to the periphery of said cartridge.
  • said reaction chambers are provided relative to the periphery of said cartridge.
  • such a cartridge comprises as many channels as there are reaction chambers.
  • sections of channels common to several reaction chambers may be provided.
  • the cartridge preferably has a diameter of between about 1 and 10 cm.
  • a variant of the cartridges of the invention described above whatever their geometry, consists in dividing the reservoir (11) into 2 to 20, preferably 2 to 8 sub-reservoirs, making it possible to analyze several samples simultaneously. on the same cartridge.
  • each of the reaction chambers (13) is connected to only one of these sub-tanks by a channel (12).
  • the depth of the reaction chambers may also vary depending on the embodiments of the invention. According to a preferred variant, these chambers have a depth of between approximately 0.5 mm and 1.5 mm.
  • this cartridge depends on several factors including the material constituting it.
  • this cartridge is preferably made of plastic material, preferably polycarbonate, whose physical, optical and thermal properties are suitable for carrying out the present invention.
  • the thickness of the cartridges of the invention is preferably between 0.5 and 5 mm.
  • the thickness of the "floor” thereof will preferably be as low as possible. This thickness depends on the material used to make the cartridge. Preferably, it is between 0.05 and 0.5 mm, for example about 0.25 mm.
  • reaction chambers of the cartridges of the invention are preferably closed by a transparent upper wall (17), for example of transparent plastic, in order to allow the excitation and the measurement of the fluorescence of the reaction fluid, in good conditions.
  • the chambers are provided with vents (open system), allowing the air they contain to escape during their filling by the fluid from the tank.
  • the channels (12) preferably consist of at least two parts of different diameters (121 and 122), the diameter of the second part (122) being smaller than that of the first part (121), so as to create a pressure drop in the channel (12).
  • the pressure drop phenomenon stops the progression of the fluid in the channel or channels whose first portion (121) is filled, until all the channels are filled in the same way. This allows to "pre-calibrate” the volumes for each channel, to ensure a homogeneous filling of the different reaction chambers.
  • the second portion of the channel (122) may consist for example of a glass capillary, much smaller in diameter than the first portion (121), said capillary being included in a plastic cartridge.
  • the cartridges described above provided for use in an open system or for use in a closed system, preferably comprise an opening that can be adapted to means (4) for modulating the pressure in the reservoir (11), making it possible to move the fluid in the reservoir to the reaction chambers.
  • each channel (12) is equipped with an anti-reflux cavity (123) at its junction with the reservoir (11), said anti-reflux cavity consisting of a substantially vertical channel portion of a diameter greater than or equal to that of the channel (12).
  • This variant has two main advantages. On the one hand, these anti-reflux cavities make it possible to prevent cross-contamination in the event of an inadvertent return of fluid to the reservoir (11), or in the case where all the fluid has not been engaged in the channels. On the other hand, these cavities make it possible to provide, in the devices of the invention, a plug whose serrations come to marry these vertical inlets, in order to plug the channels after the addressing of the reaction fluid but before the amplification reaction.
  • each of the reaction chambers (13) comprises oligonucleotides. More preferably, each of the reaction chambers (13) comprises two primers specific for a nucleic acid sequence to be amplified and, optionally, one or more labeled probe (s) specific for said sequence.
  • a probe may be labeled so that its signal is increased when it hybridizes to its target sequence (Sunrise TM system), or so that elongation from a strand on which it is hybridized causes a decrease or increase in the signal (AmptiSensor TM system or TaqManrn TM system, respectively).
  • probes in the reaction chambers makes it possible to carry out quantized amplifications in real time, with a device of the invention having means (5) for excitation / measurement of the fluorescence, as described above.
  • Control probes nonspecific of the sequence to be amplified, and labeled in a different way from the specific probes, can also be used to detect possible contaminations.
  • these different probes and primers will preferably be chosen such that their melting temperatures (Tm) respective ones are close.
  • Tm melting temperatures
  • the Tm of the different primers will preferably be in the same range of about 5 ° C.
  • the different probes will preferably have a Tm within the same range of 5 ° C, which may be different from the range of Tm primers.
  • the probes will be chosen so that their Tm is greater than that of the primers, the difference between Tm of the different categories of oligonucleotides then being preferably of the order of 5 ° C.
  • the hybridization temperature chosen to carry out the amplification then corresponds to the lowest of the melting temperatures of the primers.
  • the reaction chambers (13) of the cartridges of the invention may also comprise, in addition to the primers and any probes, one or more other reagents necessary for the PCR reaction or measurement of the amplification. It may be, for example, salts, dNTPs, or a fluorescent interlayer of double-stranded DNA, SybrGreen type (trademark). As mentioned above, all these reagents are advantageously deposited at the level of the reaction chambers (13) by the deposition of a liquid solution, followed by drying.
  • the cartridges are intended for screening a large number of samples according to a small number of criteria. This implies that the user of these cartridges can easily deposit his samples in each of the reaction chambers (13).
  • the cartridge can for example have a removable cover which, when removed, gives direct access to the reaction chambers.
  • Such cartridges may also be pre-charged and comprise, in the reaction chambers (13), one or more reagents necessary for amplification and / or detection.
  • the devices of the invention mentioned above may comprise one or more cartridges corresponding to any of the cartridges described above.
  • the distinct heating zones of the heating plate (2) are preferentially distributed according to disk portions ( Figure 2A ) or crown ( Figure 2B ). Each portion may be heated to a different temperature to successively bring the contents of the reaction chambers to the desired different temperatures, by means of relative displacement means (3) between the cartridge (1) and the heating stage (2).
  • the thermoblocks are preferably sufficiently wide to heat also part of the channels, as represented for example in FIG. figure 11 , as part of a rectangular cartridge.
  • the number of separate heating zones can be two, three, or more.
  • platinum may have a 95 ° C zone for denaturation of double-stranded nucleic acids, and a 60 ° C region for primer hybridization and elongation.
  • the platinum will have an area at 95 ° C (denaturation), a region between 40 and 70 ° C (primer hybridization), and an area at 72 ° C (elongation).
  • the plate may have a number of zones greater than three, for example to temporarily block the reaction at a given moment in each cycle.
  • the platen can also have a number of zones that is a multiple of two or three, so that one revolution of the cartridge corresponds to several PCR cycles.
  • the relative size of the different heating zones is advantageously chosen proportionally to the desired incubation time for the reaction fluid at the temperature of said zone.
  • the thermoblock 21, dedicated to the denaturation step has a surface twice as small as that of the thermoblocks for the hybridization and elongation steps (blocks 22 and 23, respectively).
  • the plate (2) is fixed and the cartridge (1) is moved by means of displacement (3).
  • the displacement means (3) allow the rotation of said cartridge and / or said platen.
  • a conductive element can be provided between the cartridge and the heating plate.
  • said cartridge is in direct contact with said heating stage.
  • said plate is advantageously provided with a coating promoting displacement between said cartridge and said plate.
  • a coating may for example be made of Teflon (registered trademark).
  • the system heating plate may have at least two or three zones that can be raised to different temperatures.
  • this plate consists of two or three independent thermal blocks ("thermoblocks") connected to separate means for programming their temperature.
  • thermoblocks independent thermal blocks
  • the first of these thermoblocks (21) is heated to the denaturation temperature, the second (22) to the hybridization temperature, the third (23) to the elongation temperature.
  • the use of such thermoblocks of constant temperature simplifies the production of the heating stage.
  • the relative displacement means of the cartridge relative to the platen can be realized in multiple forms.
  • the cartridge (1) has on the underside a central projection (181) having a notch (182), so that the projecting portion (181) fits into the heating stage (2) and connects the cartridge (1).
  • the displacement means (3) at a cleat or shaft (32) set in motion by a micromotor (31).
  • the protruding part (181) therefore makes it possible, on the one hand, to position a cartridge with respect to a plate (2) such as that represented in FIG. Figure 2B and, secondly, to ensure its connection with the moving means (3).
  • the cartridge has at least one lug (183) and the displacement means (3) include at least one axis (32) cooperating with said lug to instill in said cartridge a rotary movement.
  • the relative mode of movement between the plate and the cartridge may vary according to the embodiments. It may be a movement at continuous speed or in jerks. The speed of movement may be constant or vary over time.
  • the system according to the invention also comprises optical means for excitation / measurement of the fluorescence, provided for example above or on the side of said cartridge.
  • optical means for excitation / measurement of the fluorescence provided for example above or on the side of said cartridge.
  • these means will constitute a single and fixed system.
  • An advantage of a preferred variant of the invention according to which the cartridge is circular and moved in a rotary displacement is to be able to successively bring each reaction chamber under said optical system, thus reducing its complexity.
  • a tracking system for example located on the cartridge (1), makes it possible to determine at any moment that the reaction chamber is situated opposite the optical system.
  • the means for supplying the fluid present in said reservoir to said reaction chambers can be made in different forms. As has been described above, two categories of modes of addressing the fluid towards the reaction chambers can be distinguished: open system addressing, which assumes an increase in pressure at the reservoir and the presence of vents (14). ) at the level of the reaction chambers, and the addressing in closed system, which begins on the contrary by the establishment of a vacuum in the cartridge (1), followed by a recovery of this pressure.
  • the means (4) for supplying the fluid into the reaction chambers differ according to the embodiment chosen.
  • the fluid contained in the reservoir is distributed under pressure in the reaction chambers so as to allow uniform filling of these chambers.
  • the feed means (4) preferably include a piston device (41) whose penetration rate in the tank will be calculated to promote the proper filling of the reaction chambers.
  • these supply means include a pump connected to increase the pressure in the tank (11).
  • another preferred variant of the invention involves working in a closed system.
  • the fluid contained in the reservoir is then distributed in the reaction chambers as follows: in a first step, a vacuum is created inside the cartridge, where appropriate by a piston device or a pump (42), connected this time to reduce the pressure in the cartridge (1).
  • the pressure is then restored, allowing the fluid to engage the channels and fill the peripheral reaction chambers.
  • reagents necessary for the amplification reaction and / or the detection of the products of the amplification, and distinct from the primers and probes are pre-distributed in the reaction chambers (13). of the cartridge (1).
  • the fluid introduced into the reservoir (11) does not then contain these reagents.
  • the fluid distribution step in the reaction chambers (13) is carried out either by applying a vacuum inside the cartridge, then by restoring the pressure (closed system), or by increasing the pressure at the reservoir (11). ), provided that the reaction chambers are provided with vents (open system).
  • the system for detecting and quantifying target nucleic sequences represented in figure 1 comprises a circular plastic cartridge 2 mm thick having a diameter of 5 cm.
  • This cartridge (1) is provided with a central reservoir (11) and will be described in more detail with reference hereinafter to Figures 3 and 4 .
  • the capacity of the reservoir is, in the context of the present embodiment, 400 .mu.l. Its floor is flat but it will be noted that in other embodiments it may be curved to facilitate the passage of fluid to the chambers without the formation of air bubbles, especially at the end of addressing when the reservoir is almost empty.
  • the system further comprises a heating plate (2) in direct contact with the underside of the cartridge (1) and means (3) for moving the cartridge (1) relative to the heating plate (2).
  • These displacement means include a micromotor (31) connected to two axes (32) which cooperate with two lugs (183) of the cartridge (1) to inculcate in it a rotary movement on the heating plate (2), the latter while remaining fixed.
  • the described system also comprises a piston (41) intended to cooperate with said reservoir (11) as well as an optical device (5) for excitation / fluorescence measurement (emitting source allowing excitation at a given, programmable wavelength). and fluorescence receiver emitted) fixed and placed above the cartridge (1) and the heating plate (2).
  • the heating plate (2) consists of three metal blocks (21, 22 and 23) (hereinafter referred to as thermoblocks) in the form of disk portions. Note that in this embodiment, these thermoblocks have substantially the same size but that, in other embodiments, they may have a different size, the size being understood as the occupied angular surface in top view.
  • thermoblock (21, 22 and 23) is designed to be brought to a constant and programmable temperature, corresponding to one of the phases (denaturation, hybridization or elongation) amplification cycles (PCR), generally respectively 94 ° C for denaturation, 72 ° C for elongation, and between 30-40 and 65-70 ° C for hybridization according to the Tm (hybridization temperature) of the primers used.
  • the temperatures of the thermoblocks may be controlled by any means known to those skilled in the art.
  • the cartridge (1) is provided with a central tank (11) of capacity 400 ⁇ l connected to 36 reaction chambers (13) by as many channels (12), distributed uniformly over the entire periphery of the cartridge (on the figure 3 , we did not represent all the channels and rooms but only some of them).
  • These reaction chambers (13) are further provided with vents (14) abutting on the edge of the cartridge (1).
  • the channels have a diameter of 0.2 mm and the volume of the reaction chambers is 2.5 microliters. In other embodiments, this diameter and this volume may of course be different.
  • this cartridge (1) is also provided with two lugs (183) each pierced with an orifice for passing an axis (32) connected to the micromotor (31).
  • the reaction chambers have a depth of 1 mm. Their floor has a thickness of about 0.2 mm. This thickness is sufficiently small to facilitate good heat exchange between the chambers (13) and the thermoblocks (21, 22 and 23).
  • the reaction chambers (13) are closed in their upper part by a wall (17) transparent, also forming the wall of the tank (11).
  • Each chamber 10 except a few for negative control purposes, contains two primers specific for a target sequence to be amplified, and optionally one or more labeled probes, allowing a subsequent specific measurement of fluorescence.
  • 10 ng of each primer were distributed in each chamber except for those serving as a negative control.
  • the piston (41) After partially filling the reservoir (11) with the fluid whose volume is equal to the sum of the volumes of the chambers (the volume of a chamber is defined as being the product of its "floor” surface by its depth), the piston (41) is actuated to dispense this fluid into the plurality of reaction chambers (13).
  • This piston increases the pressure within the reservoir (11) and allows the passage of fluid in the channels to the chambers.
  • the speed of movement of the piston in the reservoir is about 1 mm per second and said displacement is stopped at a level that depends on the volume of fluid to be addressed in the chambers.
  • the small diameter of the channels (12) makes it possible to prevent the diffusion of the fluid from the reservoir (11) to the channels (12) and the chambers (13) under the effect of gravity (at this scale, the processes are usually negligible as the capillary forces become pregnant, and in this case are enough to keep the fluid in the tank). Thanks to the vents (14), the air present in the chambers (13) is evacuated, which ensures the filling thereof.
  • thermoblocks (21, 22, 23) are brought to the three temperatures corresponding to the three temperatures of the phases of the PCR (or at slightly higher temperatures taking into account the possible heat losses between the heating stage (2) and the cartridge 1) and the displacement means (3) are implemented so as to animate the cartridge (1) by a gyratory movement in order to pass each reaction chamber successively and as many times as desired over the three thermoblocks.
  • the block (21) is brought to the temperature corresponding to the denaturation phase (94 ° C.)
  • the thermoblock (22) is brought to the temperature corresponding to the hybridization phase (36 ° C.)
  • the thermoblock (23) is brought to the temperature corresponding to the phase of elongation (72 ° C).
  • the micromotor (31) of the displacement means (3) is adapted to inculcate a rotation of 10 degrees every 2.5 seconds to the cartridge (1) (ie a 1.5 PCR cycle). min).
  • this movement may have a different speed and be continuous instead of jerky.
  • the optical device (5) is provided above the corresponding block 23 raised to a temperature corresponding to the elongation temperature, and more particularly to a location corresponding to the end of the elongation phase.
  • the optical device (5) can be placed at a different location, chosen in particular according to the chemistry used. For example, using TaqMan TM chemistry or nonspecific fluorescence, it makes sense to perform the measurement at the end of the elongation phase, as described above.
  • the use of a Molecular Bacons TM type of chemistry implies that the measurement is done rather at the time of the hybridization.
  • the system presented makes it possible to rapidly and reproducibly fill a large quantity of reaction chambers and to carry out PCR and fluorescence measurements on each PCR cycle.
  • FIGS. 5 to 10 represent an example of a circular cartridge exhibiting certain modifications with respect to the cartridge of example 1.
  • This cartridge is intended for use in a closed system, that is to say that the reaction chambers (13) have no other opening than the arrival of the channel (12).
  • the cartridge consists of two elements that fit into each other: the lower part, or base, is represented in Figures 5 and 6 , and the upper part, or cover, is represented in Figures 7 and 8 . The assembly of the two is illustrated in figures 9 and 10 .
  • the bottom of the tank has a conical shape allowing the fluid to be distributed at its periphery, that is to say near the entrance of the channels.
  • an anti-reflux system consisting of a vertical channel portion (123), which, on the one hand, prevents cross contamination in the event of inadvertent return of fluid to the central part or in the case where all the fluid would not be engaged in the channel and, on the other hand, allows once the addressing done but before the PCR, to come to plug the channels by means of a plug whose serrations come to marry these vertical entries, to work in closed system (no contamination, no evaporation).
  • the cartridge is made of plastic, preferably polycarbonate because this polymer has interesting physical, optical and thermal behavior characteristics.
  • the size of the channels is for example 0.4 x 0.2 mm (half-moon) in section.
  • the size of the consumable is for example 100 mm (diameter), the number of chambers is 80, the number of sub-tanks is between 1 and 8.
  • the cartridge (1) has on the underside a central projection (181) having a notch (182), so that the projecting portion (181) fits into the heating stage (2) and connects the cartridge (1). ) with the moving means (3) at a cleat or shaft (32) moved by a micromotor (31).
  • the protruding part (181) thus makes it possible, on the one hand, to position the cartridge with respect to a plate (2) such as that represented in FIG. Figure 2B and, secondly, to ensure its connection with the moving means (3).
  • the reaction chambers are loaded with primers specific for target sequences and, where appropriate, with TaqMan TM or other probes specific for said targets.
  • the targets will be viral or bacterial genes, junctions between a transgene and the genome of a plant to detect and / or identify certain GMOs, etc.

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Claims (42)

  1. Reaktionskartusche mit mehreren Reaktionskammern (13), einem Behälter (11) und Kanälen (12), wobei die Kartusche (1) die folgenden Merkmale aufweist:
    - die Kartusche weist eine Rotationsgeometrie auf, wobei der Behälter (11) im Wesentlichen in der Mitte der Kartusche angeordnet ist, die Reaktionskammern (13) kreisförmig um den Behälter verteilt sind und die Kanäle (12) zur Verbindung des Behälters mit den Kammern im Wesentlichen radial sind;
    - die Verbindung zwischen den Kanälen (12) und dem Behälter (11) erfolgt am Umfang des Behälters;
    wobei die Reaktionskartusche dadurch gekennzeichnet ist, dass jede Reaktionskammer mit dem Behälter durch einen Kanal (12) verbunden ist, der einen Querschnitt aufweiset, der in einem Kreis mit einem Durchmesser kleiner als 3 mm enthalten ist, der Rauminhalt des Behälters kleiner als 10 ml ist und der Boden des Behälters konvex ist, derart, dass er die Verteilung des in dem Behälter enthaltenen Fluids im Bereich des Eingangs der Kanäle bewirkt.
  2. Kartusche nach Anspruch 1, wobei der Durchmesser der Kanäle (12) kleiner oder gleich 0,2 mm ist.
  3. Kartusche nach Anspruch 1 oder 2, wobei der Rauminhalt des Behälters (11) zwischen 0,1 ml und 1 ml beträgt.
  4. Kartusche nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sie zwischen 20 und 500 Reaktionskammern enthält.
  5. Kartusche nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Fassungsvermögen der Reaktionskammern wischen 0,2 und 50 µl, vorzugszueise wischen 1 und 10 µl beträgt.
  6. Kartusche nach einem der Ansprüche 1 bis 5, wobei der Boden des Behälters (11) konisch ist.
  7. Kartusche nach einem der Ansprüche 1 bis 6, wobei die Reaktionskammern (13) am Umfang der Kartusche angeordnet sind.
  8. Kartusche nach einem der Ansprüche 1 bis 7, einen Durchmesser zwischen 1 und 10 cm aufweisend.
  9. Kartusche nach einem der Ansprüche 1 bis 8, wobei der Behälter (11) in 2 bis 8 Unterbehälter (111 bis 118) unterteilt ist und jede der Reaktionskammern (13) mit nur einem dieser Unterbehälter durch einen Kanal (12) verbunden ist.
  10. Kartusche nach einem der Ansprüche 1 bis 9, wobei die Reaktionskammern eine Tiefe zwischen 0, 5 und 1, 5 mm aufweise.
  11. Kartusche nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass sie aus Kunststoff, vorzugsweise aus Polycarbonat ist.
  12. Kartusche nach einem der Ansprüche 1 bis 11, deren Dicke wischen 0,5 und 5 mm beträgt.
  13. Kartusche nach einem der Ansprüche 1 bis 12, wobei der Boden der Reaktionskammern (13) eine Dicke wischen 0,5 und 5 mm, vorzugsweise ungefähr 0,25 mm aufweist.
  14. Kartusche nach einem der Ansprüche 1 bis 13, wobei die Reaktionskammern (13) durch eine transparente obere Wand (17) geschlossen sind.
  15. Kartusche nach einem der Ansprüche 1 bis 14, wobei die Reaktionskammern (13) mit Lüftungslöchern (14) versehen sind.
  16. Kartusche nach einem der Ansprüche 1 bis 14, wobei die Reaktionskammern (13) verschlossen sind.
  17. Kartusche nach einem der Ansprüche 1 bis 16, wobei der Behälter (11) eine Öffnung aufweist, die an Mittel (4) zur Modulierung des Drucks in dem Behälter anpassbar ist.
  18. Kartusche nach einem der Ansprüche 1 bis 17, wobei jeder Kanal (12) von zumindest zwei Bereichen mit unterschiedlichen Duchmessern (121 und 122) gebildet ist, wobei der Durchmesser des zweiten Bereichs (122) kleiner als der des ersten Bereichs (121) ist, derart, dass ein Druckabfall in dem Kanal (12) erzeugt wird.
  19. Kartusche nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass jeder Kanal (12) mit einem Rückschlagshohlraum (123) im Bereich seiner Verbindung mit dem Behälter (11) versehen ist, wobei dieser Rückschlagshohlraum von einem im Wesentlichen vertikalen Kanalabschnitt mit einem Durchmesser größer oder gleich dem des Kanals (12) gebildet ist.
  20. Kartusche nach einem der Ansprüche 1 bis 19, wobei ein Teil zumindest der Reaktionskammern (13) Oligonukleotide aufweist.
  21. Kartusche nach einem der Ansprüche 1 bis 20, wobei jede der Reaktionskammern (13) zwei spezifische Initiatoren einer zu vervielfältigenden Nukleinsäure-Sequenz und, fakultativ, eine markierte Sonde aufweist, die spezifisch für diese Sequenz ist.
  22. Kartusche nach einem der Ansprüche 1 bis 21, wobei zumindest ein Teil der Reaktionskammern (13) Reagenzien enthalten, die dort durch Einbringen einer Flüssigkeit gefolgt von einer Trocknung eingebracht werden, derart, dass der Eintritt eines Fluids in die Reaktionskammern die Reagenzien wieder auflöst.
  23. Vorrichtung zur Durchführung enyzmatischer Reaktionen und/oder Molekularbiologie-Reaktionen, die zumindest zwei verschiedene Inkubationstemperaturen benötigen, dadurch gekennzeichnet, dass sie umfasst:
    - zumindest eine Kartusche (1) nach einem der Ansprüche 1 bis 22,
    - zumindest eine Heizplatte (2), die zumindest zwei unterschiedliche Zonen aufweist, die auf zumindest zwei verschiedene Temperaturen gebracht werden können,
    - Mittel (3) für die relative Bewegung zwischen der Kartusche und der Platte, um eine zyklische Veränderung der Temperatur der Reaktionskammern zu ermöglichen.
  24. Vorrichtung nach Anspruch 23, wobei die enzymatische Reaktion eine temperaturabhängige Kettenreaktion von Nukleinsäure-Sequenzen ist und wobei die Zonen der Heizplatte (2) auf zumindest zwei verschiedene Temperaturen gebracht werden können, die den Phasen der Zyklen für die Vervielfältigung der Nukleinsäuren entsprechen.
  25. Vorrichtung nach Anspruch 24, dadurch gekennzeichnet, dass
    - spezifische Initiatoren von zu vervielfältigenden Zielsequenzen in den Reaktionskammern (13) vorab verteilt sind,
    - der Behälter (11) für die Aufnahme eines Fluids vorgesehen ist, das insbesondere von einer zu analysierenden Nukleinsäure-Probe und Reagenzien gebildet ist, die für eine Polymerase-Kettenreaktion notwendig sind, mit Ausnahme der Initiatoren,
    - die Heizplatte (2) drei unterschiedliche Zonen aufweist, die auf drei verschiedene Temperaturen gebracht werden können, die den drei Phasen der Zyklen für die Polymerase-Kettenreaktion entsprechen.
  26. Vorrichtung nach Anspruch 24 oder 25 für die temperaturabhängige Kettenreaktion von Nukleinsäure-Sequenzen, die in Echtzeit gemessen wird, dadurch gekennzeichnet, dass sie optische Mittel (5) für die Anregung/Messung der Fluoreszenz enthält, die derart angeordnet sind, dass sie bei jedem Zyklus die Fluoreszenz des Inhalts der Reaktionskammern anregen und messen.
  27. Vorrichtung nach einem der Ansprüche 23 bis 26, wobei die unterschiedlichen Heizzonen der Platte (2) als zumindest zwei oder drei Scheibenteile aufgeteilt sind.
  28. Vorrichtung nach einem der Ansprüche 23 bis 27, wobei die Heizplatte (2) feststehend ist und die Kartusche (1) mit Hilfe der Bewegungsmittel (3) bewegt wird.
  29. Vorrichtung nach einem der Ansprüche 23 bis 27, wobei die Kartusche (1) feststehend ist und die Heizplatte (2) mit Hilfe der Bewegungsmittel (3) bewegt wird.
  30. Vorrichtung nach einem der Ansprüche 23 bis 29, wobei die Bewegungsmittel (3) es ermöglichen, die Kartusche (1) und/oder die Heizplatte (2) in eine Drehung zu versetzen.
  31. Vorrichtung nach einem der Ansprüche 23 bis 30, wobei die Kartusche (1) in direktem Kontakt mit der Heizplatte (2) ist.
  32. Vorrichtung nach einem der Ansprüche 23 bis 31, wobei die Platte (2) mit einer Beschichtung versehen ist, welche die relative Bewegung zwischen der Kartusche (1) und der Platte (2) begünstigt.
  33. Vorrichtung nach einem der Ansprüche 23 bis 32, wobei die Heizplatte (2) zwei oder drei unterschiedliche Thermoblocks (21, 22 und gegebenenfalls 23) aufweist, die mit Mitteln zur Programmierung ihrer Temperatur verbunden sind.
  34. Vorrichtung nach einem der Ansprüche 23 bis 33, wobei die Kartusche (1) auf der Unterseite einen mittigen vorspringenden Teil (181) mit einer Nut (182) aufweist und die Bewegungsmittel (3) zumindest eine Nase (32) umfassen, die mit der Nut (182) zusammenwirkt, um die Kartusche (1) in eine Drehbewegung zu versetzen.
  35. Vorrichtung nach einem der Ansprüche 23 bis 34, umfassend optische Mittel (5) für die Anregung/Messung der Fluoreszenz, die oberhalb oder seitlich zur Kartusche angeordnet sind.
  36. Vorrichtung nach einem der Ansprüche 23 bis 35, ferner Mittel (4) für die Zuführung des in dem Behälter (11) vorhandenen Fluids in die Reaktionskammern (13) umfassend.
  37. Vorrichtung nach Anspruch 36, wobei die Zuführmittel (4) eine Kolben-Vorrichtung (41) umfassen und das Fluid in die Reaktionskammern durch eine Erhöhung des Drucks zugeführt wird.
  38. Vorrichtung nach Anspruch 36, wobei die Zuführmittel (4) eine Pumpe (41) umfassen und das Fluid in die Reaktionskammern durch eine Wiederherstellung des Drucks nach einer Erzeugung eines Unterdrucks zugeführt wird.
  39. Vorrichtung nach Anspruch 38, wobei die Reaktionskammern (13) der Kartusche (1) verschlossen sind.
  40. Verfahren zur Vervielfältigung von Nukleinsäure mit Hilfe einer Vorrichtung nach einem der Ansprüche 23 bis 39, das die folgenden Schritte umfasst:
    - zumindest teilweises Befüllen des Behälters (11) mit einem Fluid, das eine zu analysierende Nukleinsäure-Probe sowie all das für eine Kettenreaktion Notwendige mit Ausnahme der Initiatoren und, gegebenenfalls, eine fluoreszierende Anzeige der Nukleinsäuren enthält,
    - Verteilen des Fluids in den Reaktionskammern (13) der Kartusche (1), in denen vorab Initiatoren und, gegebenenfalls, eine oder mehrere markierte Sonden angeordnet wurde,
    - Einsetzen der Mittel (3) für die relative Bewegung zwischen der Kartusche und der Heizplatte, um nacheinander und so oft wie gewünscht den Inhalt jeder Reaktionskammer auf zwei, drei oder mehr Temperaturen zu bringen, die durch die zwei, drei oder mehr Zonen der Heizplatte (2) festgelegt werden.
  41. Vervielfältigungsverfahren nach Anspruch 40, wobei der Schritt der Verteilung des Fluids in den Reaktionskammern (13) durchgeführt wird, indem ein Unterdruck im Innern der Kartusche erzeugt wird und anschließend der Druck wiederhergestellt wird.
  42. Verfahren zur Befüllung der Reaktionskammern (13) einer Kartusche (1) im geschlossenen System nach Anspruch 17, das die folgenden Schritte aufweist:
    - zumindest teilweises Befüllen des Behälters (11) mit einem Fluid,
    - Anschließen der Kartusche an die Mittel (4) zur Modulierung des Drucks,
    - Erzeugen eines Unterdrucks im Innern der Kartusche und anschließend Wiederherstellen des Drucks.
EP01956628A 2000-07-28 2001-07-20 Vorrichtung zur pcr-amplifizierung von ziel-dna-sequenzen Expired - Lifetime EP1305115B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK10177401.6T DK2269738T3 (da) 2000-07-28 2001-07-20 Anordning til PCR-amplificering af mål-DNA-sekvenser
EP10177401A EP2269738B1 (de) 2000-07-28 2001-07-20 Vorrichtung zur PCR-Amplifizierung von Ziel-DNA-Sequenzen

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PCT/FR2001/002385 WO2002009877A1 (fr) 2000-07-28 2001-07-20 Dispositif pour l'amplification en châine thermo-dependante de sequences d'acides nucleiques cibles

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US6821771B2 (en) 2004-11-23
DK2269738T3 (da) 2013-01-02
WO2002009877A1 (fr) 2002-02-07
JP5202686B2 (ja) 2013-06-05
EA200300203A1 (ru) 2003-06-26
BR0112789A (pt) 2003-09-09
JP2011200245A (ja) 2011-10-13
EA004719B1 (ru) 2004-08-26
JP2004504828A (ja) 2004-02-19
FR2812306B1 (fr) 2005-01-14
EP2269738A1 (de) 2011-01-05
ES2389763T3 (es) 2012-10-31
AU2001278554B2 (en) 2006-09-28
US20050026277A1 (en) 2005-02-03
JP4979873B2 (ja) 2012-07-18
US7732136B2 (en) 2010-06-08
ZA200300700B (en) 2004-03-10
FR2812306A1 (fr) 2002-02-01
EP2269738B1 (de) 2012-08-29
US20020081669A1 (en) 2002-06-27
EP1305115A1 (de) 2003-05-02
ATE532583T1 (de) 2011-11-15
CN1458866A (zh) 2003-11-26
CA2416756C (fr) 2010-01-19
ES2372027T3 (es) 2012-01-13
AU7855401A (en) 2002-02-13
CA2416756A1 (fr) 2002-02-07
CN1248781C (zh) 2006-04-05

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