EP4448791A1 - Dispositif de séquençage d'une sequence de nucleotides présentant une sensibilité augmentée et une fiabilité améliorée - Google Patents
Dispositif de séquençage d'une sequence de nucleotides présentant une sensibilité augmentée et une fiabilité amélioréeInfo
- Publication number
- EP4448791A1 EP4448791A1 EP22840268.1A EP22840268A EP4448791A1 EP 4448791 A1 EP4448791 A1 EP 4448791A1 EP 22840268 A EP22840268 A EP 22840268A EP 4448791 A1 EP4448791 A1 EP 4448791A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- probe
- recognition
- adapter
- strand
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C12Q1/6869—Methods for sequencing
- C12Q1/6874—Methods for sequencing involving nucleic acid arrays, e.g. sequencing by hybridisation
-
- 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
- C12Q1/6813—Hybridisation assays
- C12Q1/6816—Hybridisation assays characterised by the detection means
- C12Q1/6825—Nucleic acid detection involving sensors
Definitions
- the present invention relates to a device for detecting at least one nucleotide sequence and to a detection system comprising a large number of such devices.
- a sequencing device or sequencer aims to determine the exact composition of a sequence of nucleic bases or nucleo-bases on a strand of DNA or RNA analyzed. This determination can be made by identifying the sequence by interaction with a probe formed by a strand. This interaction results in a hybridization reaction between the analyzed strand and the probe strand. The analyzed strand binds with greater ease to a probe whose sequence corresponds exactly to the complementary sequence of the analyzed strand, and with less ease to a probe whose sequence is different from its complementary sequence.
- the methods of the state of the art present a lack of sensitivity by causing a large number of false positives, i.e. causing the pairing of two strands when they are not complementary by their sequences.
- One method to reduce the number of false positives is to reduce the length of the strands analyzed, but this reduction has the effect of increasing the time and the cost of the analysis of the total sequence.
- Another method consists in increasing the number of sensors equipped with the same recognition probe in order to carry out the same analysis, statistically making it possible to reduce the number of false positives. This method requires a large sample volume
- the present invention relates to a device for detecting nucleic bases or nucleo-bases.
- a detection or sequencing device comprising at least one fixed part and one part configured to be vibrated relative to the fixed part, an oligonucleotide probe mechanically connecting the fixed part and the mobile part, means for vibrating the mobile part and means for measuring the frequency of vibration of the mobile part before and after hybridization of the strand analyzed on the probe.
- the level of hybridization between the probe and the analyzed strand causes the stiffness of the probe and analyzed strand assembly to vary, which has an influence on the mechanical resonance frequency of the vibrating part. This level of hybridization is thus detected.
- the mechanical stiffness of a set composed of an analyzed strand and a sequence of nucleotides is measured, this stiffness being characteristic of the level of pairing of the analyzed strand and of the sequence, which makes it possible to deduce the structure of the strand in case of complete pairing.
- the mobile part is a resonant optomechanical ring.
- the device can be integrated into a fluidic channel in which a fluid comprising the analyzed strands circulates so as to come into contact with the probe.
- a system comprising a large number of devices for detecting nucleic bases or nucleo-bases or for sequencing making it possible, for example, to analyze a complete genome in a single measurement.
- the present invention relates to a device for detecting and/or sequencing at least one strand of nucleotides comprising a support, at least one moving part relative to the support, means for vibrating the moving part at a given frequency, means for measuring the vibration frequency of the moving part, a recognition probe mechanically connecting the support and the moving part, the recognition probe comprising at least one nucleotide sequence.
- the means for vibrating the mobile part are configured to vibrate the mobile part at its resonant frequency.
- the means for measuring the frequency of vibration are opto-mechanical means.
- the means for measuring the vibration frequency comprise at least one waveguide optically coupled with the moving part, a light source for injecting light into the waveguide and a processing unit light coming out of the waveguide.
- the mobile part can be in the form of a disc, a ring, a racetrack or an ellipse suspended by at least one foot.
- the device may comprise several identical probes connecting the mobile part to the support.
- the support may comprise a first adapter precursor and a first adapter, one end of which is fixed to the first adapter precursor and the other end comprises a sequence of nucleotides hybridized with one end of the recognition probe, and in which the part mobile comprises a second adapter precursor and a second adapter comprising a probe, one end of which is fixed to the second adapter precursor and the other end comprises a sequence of nucleotides hybridized with one end of the recognition probe.
- the present invention also relates to an assembly comprising the device as defined previously as well as a fluidic channel ensuring the bringing into contact of a liquid containing the said analyzed strand and of the recognition probe.
- the present invention also relates to a system comprising a plurality of sequencing devices as defined previously.
- the devices are divided into groups, each group comprising recognition probes having the same nucleotide structure.
- the recognition probes are chosen so that in a single measurement a complete genome is analyzed.
- the present invention also relates to a method for detecting nucleic bases or nucleo-bases or for sequencing at least one nucleotide sequence comprising:
- the moving part is vibrated at its resonant frequency.
- the mobile part can be vibrated with an amplitude of the order of 0.1 nm.
- the mobile part is vibrated at a frequency between 100 MHz and 1 GHz.
- Figure 1 is a side view of an embodiment of a device according to the invention.
- Figure 2 is a view of the device of figure 1 in a state in which an analyzed strand is hybridized on the probe
- Figure 3B is a detail view of the device of Figure 1,
- Figure 3A is a detail view of the device of Figure 1 without attachment probe
- Figure 4 is a detail view of a variant of the device of Figure 1
- Figure 5 is a schematic representation of the device of Figure 1 integrated into a fluidic channel
- Figure 6 is a representation of a device as implemented according to one embodiment and implementing opto-mechanical detection means
- Figure 7 is a top view of a system comprising a network of detection devices
- Figures 8A-8B, 9A-9B, 10A-10B serve to illustrate the operation of an example of a device for detecting nucleic bases or nucleo-bases of a DNA or RNA strand and more particularly for detecting the level of hybridization between a recognition probe and this strand.
- Figure 1 one can see an embodiment of a detection device.
- the invention applies to the determination of DNA fragments and RNA fragments, and can find application in the sequencing of genomes.
- DNA or RNA sequencing consists in determining the sequence order of nucleotides for a given DNA fragment or a given RNA fragment respectively.
- FIGs 1, 2 and 3A and 3B one can see an example of a device comprising at least one fixed part 2, two in the example shown, for example secured to a support 3 and a part 4, designated part mobile, intended to be mobile relative to the fixed part 2 in the plane of the device.
- the fixed part 2 is arranged close to the mobile part 4.
- the distance between the edge of the fixed part 2 and the facing edge of the mobile part 4 is for example between 100 nm and 200 nm. This distance is chosen so as to avoid any contact between the moving part and the fixed part under normal conditions of oscillation of the moving part.
- the plane of the device or of the sensor is the plane parallel to the support 3, generally formed by a substrate implemented in micro-electromechanics.
- the mobile part comprises a platform 6 suspended by a foot 8.
- the dimensions of the foot and of the platform 6 are such that the platform 6 can oscillate substantially in the plane.
- the device is a resonant device and comprises excitation means 10 for vibrating the mobile part 4 in the plane.
- the excitation means are of the electrostatic type and comprise an electrode 10.1 on the fixed part and an electrode 10.2 on the mobile part formed directly by the foot.
- the application of a potential difference between the electrodes generates electrostatic forces between the foot and the fixed part causing the platform to vibrate.
- the implementation of excitation means at the foot makes it possible to limit the size.
- optical excitation means In particular, radiation or thermo-optic forces are used. In both cases, it is a question of using a laser with a wavelength in an optical peak, but whose power is modulated at the frequency of interest, in this case that of the mechanical resonance of the device.
- This laser can be the same as that used for optical reading, or another laser, for example which is superimposed on the first.
- the device also includes means (not shown) for measuring the vibration frequency of the moving part.
- the moving part then forms a mechanical resonator.
- These means comprise for example one or more capacitive, piezo-resistive, opto-mechanical, acoustic wave transducers of the bulk acoustic wave type BAW (“Bulk Acoustic Wave” in Anglo-Saxon terminology) or of the surface acoustic wave type. SAW (“Surface Acoustic Wave” in Anglo-Saxon terminology).
- the moving part 4 can be a beam embedded at one end and vibrated by electrostatic means and whose frequency is measured by piezoresistive gauges.
- the mobile part 4 can be a vibrating plate in a Lamé or breathing mode.
- the mobile part is excited at a resonance frequency allowing maximum amplification of the input signal and maximum sensitivity of the response of the device to a disturbance (modification of the environment).
- the resonator is preferably chosen so as to have reduced viscous damping.
- the device is intended to be placed in a fluidic channel in which a liquid containing the analyzed strand(s) flows.
- FIG. 3B an enlarged view of the device of FIG. 1 can be seen.
- FIG. 3A represents the device before the attachment of an SR recognition probe.
- the device comprises an SR recognition probe intended to hybridize with the analyzed strand.
- the recognition probe is for example an oligonucleotide probe.
- the probe may for example comprise between a hundred and several thousand nucleotides.
- the device also comprises nucleotide sequences 12, 14, one fixed by one end to the fixed part 2 and the other fixed by one end to the mobile part 4.
- the two free ends of the nucleotide sequences 12, 14 are intended to cling to the ends of the SR recognition probe by hybridization and allow the SR recognition probe to mechanically connect the fixed part 2 and the mobile part 4.
- Sequences 12, 14 are designated “adapters” and comprise the sequences complementary to the ends of the recognition probe, which allows the hybridization of the two ends of the recognition probe on the adapters.
- the recognition probe SR comprises a succession of free nucleotides designated “useful zone” and intended to cooperate by hybridization with the analyzed strand.
- the fixed part comprises on its upper face a layer 16 enabling the attachment of the adapter 12 and the upper face of the mobile part comprises a layer 18 enabling the attachment of the adapter 14.
- the layers 16, 18 are said to be "adapter precursors" and comprise for example silane or a thin metallic layer.
- a DNA-thiol adapter on a gold tie layer can be provided.
- One or more thiols, polyethylene glycol PEG, epoxy can also be used for the adapter precursor.
- biotin and streptavidin There is also a strong affinity between biotin and streptavidin, so one of these two elements can correspond to a precursor adapter while the other can be provided at one end of the adapter 12, 14 thus making it possible to "attach" the adapter to the fixed or mobile part.
- the upper face of the fixed part and of the mobile part have different functionalizations in order to be selective with respect to the adapter precursors.
- the functionalization is for example obtained by forming a film 17 on the upper face of the fixed part and a film 19 of different material on the upper face of the mobile part.
- the films 17, 19 can for example be made of a polymer material or a metallic material such as gold.
- the films 17, 19 have a thickness of the order of 100 nm.
- the functionalized zones are located at the most mechanically sensitive places, i.e. which have the greatest displacement, for example the edge of the mobile part and/or opposite the fixed part.
- the adapters are therefore chosen according to the recognition probe to be placed between the fixed part and the mobile part and therefore according to the strand analyzed.
- the device comprises several fixed parts and several recognition probes connecting the fixed parts to the mobile part, the probes comprising the same nucleotide sequences.
- the fixed parts can be in one piece and for example formed of a ring around the mobile part.
- FIG 5 one can see a schematic representation of an assembly comprising the device of Figures 1 and 2 integrated in a fluid channel C, for example formed by cooperation between a cover 21 and the support 3 of the device.
- the circulation of the liquid containing the strands to be analyzed is in open circuit or in continuous circuit.
- the channel is connected to a reservoir containing the liquid and the strands to be analyzed and to a zone for collecting the liquid after circulation in the channel.
- a circulation pump may be provided.
- the liquid is for example injected into the channel by a syringe and a pump ensures the recirculation of the liquid in the channel. Closed-loop operation allows products to be recycled and several measurements to be made. Provision can be made to reset the sensors by implementing thermal melting of the paired DNA strands. Provision can also be made to accumulate measurement data without carrying out intermediate heating between the consecutive measurement cycles by causing the fluid to circulate several times over the device(s).
- the mobile part 4 connected to the fixed part 2 by the “adapter-recognition probe-adapter” assembly is vibrated by the excitation means.
- the amplitude of the vibration on the order of an interatomic distance about 0.1 nm (1 Angstrom).
- the "adapter - recognition probe - adapter” assembly has a certain stiffness and dissipates a certain amount of energy.
- the mobile part oscillates in the plane at a given frequency typically between 100 kHz and 1 GHz, preferably between 1 MHz and one or more tens of MHz resulting from the excitation means, the stiffness of the "adapter - probe recognition-adaptor” and its dissipation.
- a liquid containing the analyzed DNA or RNA strand circulates on the sequencer device. This comes into contact with at least the part of the SR recognition probe not hybridized with the adapters.
- the strand analyzed hybridizes more or less completely with the attachment probe (FIG. 2).
- the higher the level of hybridization the more the stiffness of the "adapter - recognition probe - adapter" and analyzed strand assembly increases and the more the probe-strand assembly couples the fixed part to the mobile part, which has the effect to modify the oscillation frequency of the moving part.
- the measuring means measure this vibration frequency which has varied with respect to its vibration frequency before the hybridization of the analyzed strand.
- the frequency can vary from one to several hundred Hertz.
- the big one Measurement sensitivity, to the nearest nucleotide, SNP for "single-nucleotide polymorphism", ie polymorphism of a single nucleotide
- SNP single-nucleotide polymorphism
- the device therefore has high reliability, high sensitivity and high detection speed.
- the measurement of the dissipated energy is a rich source of information on the hybridization process.
- the vibration frequency of the mobile part does not vary or does not vary significantly, in particular less than 0.001% variation which corresponds for example to less than 300 Hz variation for an initial resonance frequency of 30 MHz.
- the high sensitivity of the detection means makes it possible to detect the level of hybridization between the strand and the recognition probe.
- This device provides high detection reliability.
- sequencer device allows the analysis of long sequences of nucleotides, which makes it possible to reduce the analysis time. For example, provision is made on the order of 5*10 6 base pairs to analyze a bacterium.
- the fact of mechanically stressing the hybridized strand makes it possible to verify the hybridization. If the strand is partially hybridized, the hybridization will be less resistant to axial mechanical stress. The axial stress then significantly reduces the risk of false positives.
- the hybridization level detection method can then take place according to the following steps:
- the sequence of the strand analyzed is then known.
- the liquid circulates.
- the circulation rate of the liquid is preferably limited, for example to a flow rate of the order of one or more ml/min.
- the hybridization can last on the order of several minutes, for example 5 minutes.
- the detection means are opto-mechanical means.
- the device comprises an optical resonator 4, at least one waveguide 20 optically coupled with the resonator, the waveguide being supported by the substrate, a light source SL and means T for processing the light wave emerging from the waveguide.
- the support, the waveguide, the opto-mechanical resonator forms a sensor structure.
- the waveguide 20 comprises an input end 20.1 of a light wave connected to a light source via a coupling network 22.1 not shown in the figure, and an output end 20.2 connected to means processing of the light wave leaving the waveguide via a coupling network 20.2.
- the resonator 4 is arranged close to a side of the waveguide 20 so as to be optically coupled thereto.
- the waveguide 20 is in the evanescent field of the resonator, so that the light wave coming from the source SL is injected into the optical resonator and the light wave having circulated in the resonator is collected by the guide. wave.
- the wave circulating in the resonator is symbolized by an arrow.
- the width of the space between the flank of the waveguide and the lateral edge of the resonator is for example between 10 nm and 50 nm.
- the optomechanical resonator 4 has the form of a disc suspended from a foot 24 fixed to one face of the disc facing the substrate. The disc extends in a plane of the sensor.
- the resonator has two end faces 4.1, 4.2 substantially parallel to the plane of the sensor and a side face 6.3 (FIG. 6).
- the foot has a small diameter compared to the dimensions of the disc in the plane of the sensor, more particularly a small diameter compared to the diameter of the disc, preferably the foot has a diameter at least 10 times smaller than the diameter of the disc .
- the diameter of the foot is ten times smaller than the smallest dimension of the resonator in the plane of the sensor, thus the foot interferes little or not with the radial vibration of the resonator.
- the resonator is suspended by in-plane springs or by radially extending nano-sized beams compressed and tensioned by the vibration of the disc.
- the springs or the beams are then sized to have a lower axial stiffness than that of the resonator.
- any other shape of resonator may be suitable, for example seen from above the resonator may have the shape of a ring, ellipse or racetrack (“racetrack” in Anglo-Saxon terminology).
- the resonator in the form of a ring, ellipse or hippodrome, the latter is suspended from the substrate, for example by means of a foot located in the center of the resonator, and beams extending between the inner edge of the resonator and the foot.
- the resonator can be made of any material capable of confining an electromagnetic wave, such as GaAS, Ge or Si.
- the latter is particularly advantageous for manufacture according to microelectronic techniques offering a high level of integration on a substrate.
- the functionalization layer is formed for example on the face 4.2 of the resonator opposite to that 4.1 facing the substrate.
- the excitation means are for example electrostatic means (not shown) or optical means.
- the wavelength of the light wave to be injected into the resonator is chosen close to the optical resonance of the resonator, ie on the edge of the optical resonance peak.
- the light resonating inside the optical resonator is then very sensitive to the mechanical deformation of the mechanical resonator, in particular when the optical and mechanical resonator are combined.
- the light wave at the chosen wavelength is injected into the waveguide by the light source, by optical coupling the light wave is injected into the optomechanical resonator 4.
- the mass of the resonator hardly varies during hybridization, consequently when the stiffness of the resonator increases, its frequency increases.
- the measurement of the variation in the vibration frequency makes it possible to determine whether the hybridization was complete or not, and if the hybridization was complete, to determine the identity of the strand analyzed. Indeed, the optomechanical resonator is sensitive enough to distinguish between perfect or near-perfect matching.
- the measurement of the variation in the vibration frequency can be combined with a measurement of the variations in the optical properties of the resonator, making it possible to acquire additional information.
- the optomechanical resonator has for example a vibration frequency between 100 MHz and 1 GHz with amplitude oscillations of the order of a few picometers.
- the fact of working at high frequencies makes it possible to increase the sensitivity of detection and the precision of the data collected, in particular by a level of temporal sampling never achieved until now.
- the optomechanical resonator as described above also offers the advantage of offering very good performance in a liquid medium.
- a system is produced comprising a large number of detection devices D (FIG. 7).
- detection devices D For example, it is possible to provide between 9 and of the order of 10,000 resonators. An even higher number of resonators can be provided, the limit being able to be defined according to the manufacturing cost.
- Each device or each group of devices can be provided with different recognition probes.
- Each detector delivers its own signal which is processed by a processing unit. Only some of the devices are shown schematically.
- the system comprises for example a fluidic channel common to all the devices or several parallel fluidic channels, each supplying a column of devices.
- the channel or channels are formed for example in a cap (not shown).
- optomechanical means facilitates such integration thanks to multiplexing techniques very well mastered in the field of optics.
- microelectronic manufacturing techniques allows the integration of a very large number of devices.
- the recognition probe equipping each device is known since it depends on the adapters fixed to the fixed part and the mobile part which are themselves determined by the functionalization of each of the parts.
- the analyzed strand detectable by each device is therefore known.
- the method described above applies to a sequencing system, however such a system makes it possible to detect several different strands.
- the liquid then contains fragments of genomes, for example a genome of several thousand bases. This is injected into the channel or channels of the system and after a step of potential hybridization of the strands on the appropriate recognition probes, the vibration frequencies of the various resonators are measured. The frequencies can be measured continuously, making it possible to follow the hybridization process.
- the detection device and the detection system are reusable; after a sequencing cycle, they can be rinsed to remove the strands hybridized on the SR recognition probes.
- rinsing solution a buffer solution (“buffer” according to the Anglo-Saxon terminology) without DNA, for example of the tris-acetate type, tris-EDTA, PBS (“Phosphate Buffered Saline”), HEPES (N-(2-Hydroxyethyl)piperazine-N'-(2-ethanesulfonic acid) with the addition of a surfactant, typically in small quantities, i.e. around 0.1% or less.
- the surfactant can be SDS ("Sodium dodecyl sulfate") or TWEEN (Polyethylene glycol sorbitan monolaurate).
- the rinsing solution is circulated to unhook the DNA strands hybridized on the recognition probe.
- the circulation should not be done in circuit
- This example is only given by way of illustration, the person skilled in the art will know how to adapt the components of the rinsing solution according to the nature of the DNA strands and other reagents used.
- the resonators can be vibrated at different frequencies, for example they can have different mechanical resonance frequencies.
- a sequencing system comprising groups of 200 devices provided with the same recognition probe comprising 150 pairs of nucleotides.
- the sequencing system comprises 4,104 optomechanical detectors/cm 2 , i.e. approximately 200 groups of 200 devices having the same recognition probe and therefore capable to detect 200 domains of different sequences.
- This system then makes it possible to analyze a complete viral genome of 30 kb, ie 30,000 bases or nucleotides, in a single series of measurements.
- each device measures 40 ⁇ m on a side, which makes it possible to produce sequencing systems having a density of devices of 62.5 ⁇ 10 3 cm 2 .
- the detection device and the detection system can advantageously be made at least in part by microelectronics techniques.
- the mobile part(s) and the fixed part(s) and optionally the waveguide(s) are made by depositing layers on a substrate and lithography and etching.
- the electrical tracks are also produced by deposition and etching.
- the polymer layers as well as the adapter precursors are for example deposited and localized by lithography and etching.
- the cover is for example made of glass and is structured to form with the substrate the fluidic channel or channels.
- the cover is attached to the substrate and is for example glued thereto.
- a liquid containing the adapters is injected into the channel or channels.
- the liquid is a physiological liquid.
- the adapters then attach to the adapter precursors.
- the liquid is at rest or in circulation generating a shear force on the fixed and mobile parts.
- the physiological liquid containing the recognition probes is injected into the channel or channels.
- the probes attach at one end to an adapter on the fixed part and at the other end on the mobile.
- the liquid is at rest or in circulation generating a shear force on the fixed and mobile parts.
- the detection device and the detection system have the advantage of using mastered materials and techniques. They have good robustness.
- sequencing devices allow many applications, such as parallel processing and profiling of coding sequences, gene selection and localization, parallel processing of multiple mutations, selection and localization of viral variants.
- a device for detecting nucleic bases or nucleobases of a DNA or RNA strand as described above makes it possible to detect a level of hybridization between a recognition probe and a given sequence of nucleotides. The more the recognition probe and the sequence are complementary, the greater the level of hybridization.
- the device illustrated in FIG. 8A uses an example of an arrangement described above in connection with FIG. 6.
- the genetic probe SR is attached on the one hand to a fixed part 2 and on the other hand to a mobile part 4, for example in the form of a disc, and in particular a surface 4.2 of this disc.
- the addition of the SR probe to the resonant disc 4 causes an increase in the vibrating mass and, as illustrated in FIG. 8B (schematically giving an evolution curve Co of the resonant frequency of the disc 4 as a function of the time) a decrease in the resonance frequency (PI portion on the Co curve).
- Such an arrangement is likely to induce a lower resonant frequency shift down compared to a conventional arrangement where the genetic probe SR would be attached entirely to the mobile part 4.
- FIGS. 9A-9B serve to illustrate when a BPC “partially complementary” DNA strand binds to the SR probe because this BPC strand has one or more common bases with a targeted region of the SR probe.
- a perfectly complementary BIC DNA strand hybridizes to the SR probe because it contains the exact complementary sequence to the sequence targeted by the SR probe.
- the first effect (portion P3a of the resonance frequency curve C2) resides in an addition of mass translated by a reduction in the resonance frequency linked to the joining of the complementary strand with the SR probe on a few bases, thus coupling the mass of the BIC strand to that of the SR probe and the mobile part 4. The more the attachment of the complementary nucleo-bases progresses, the more a double-stranded DNA double helix tends to form.
- the resonance frequency shift thus translates the level of hybridization. It is possible to calibrate the system by measuring the C2 curve with the BIC strand. In this way, during subsequent measurements, it is possible to immediately recognize whether a fully BIC-compatible strand or a partially BPC-compatible strand is detected.
- a detection device and a detection system as described previously apply to the sequencing of at least one strand of nucleotides.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113618A FR3130845B1 (fr) | 2021-12-16 | 2021-12-16 | Dispositif de séquençage d’une sequence de nucleotides présentant une sensibilité augmentée et une fiabilité améliorée |
| PCT/FR2022/052345 WO2023111452A1 (fr) | 2021-12-16 | 2022-12-14 | Dispositif de séquençage d'une sequence de nucleotides présentant une sensibilité augmentée et une fiabilité améliorée |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4448791A1 true EP4448791A1 (fr) | 2024-10-23 |
Family
ID=82320090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22840268.1A Pending EP4448791A1 (fr) | 2021-12-16 | 2022-12-14 | Dispositif de séquençage d'une sequence de nucleotides présentant une sensibilité augmentée et une fiabilité améliorée |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250122561A1 (fr) |
| EP (1) | EP4448791A1 (fr) |
| FR (1) | FR3130845B1 (fr) |
| WO (1) | WO2023111452A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8105780B2 (en) * | 2003-09-22 | 2012-01-31 | Agency For Science, Technology And Research | Device and method of detecting mutations and polymorphisms in DNA |
| WO2016160877A1 (fr) * | 2015-03-31 | 2016-10-06 | Rapid Pathogen Screening, Inc. | Détection non enzymatique d'acides nucléiques à l'aide d'une séquence de liaison oligonucléotidique à large espace cellulaire |
| FR3106005B1 (fr) * | 2020-01-08 | 2024-04-26 | Commissariat Energie Atomique | Capteur de concentration d’especes en milieu liquide offrant une resolution augmentee |
-
2021
- 2021-12-16 FR FR2113618A patent/FR3130845B1/fr active Active
-
2022
- 2022-12-14 US US18/720,131 patent/US20250122561A1/en active Pending
- 2022-12-14 EP EP22840268.1A patent/EP4448791A1/fr active Pending
- 2022-12-14 WO PCT/FR2022/052345 patent/WO2023111452A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023111452A1 (fr) | 2023-06-22 |
| US20250122561A1 (en) | 2025-04-17 |
| FR3130845A1 (fr) | 2023-06-23 |
| FR3130845B1 (fr) | 2025-10-31 |
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