WO1998045475A1 - Systemes de detection d'hybridation d'acides nucleiques, leur procede de preparation et leurs utilisations - Google Patents
Systemes de detection d'hybridation d'acides nucleiques, leur procede de preparation et leurs utilisations Download PDFInfo
- Publication number
- WO1998045475A1 WO1998045475A1 PCT/FR1998/000722 FR9800722W WO9845475A1 WO 1998045475 A1 WO1998045475 A1 WO 1998045475A1 FR 9800722 W FR9800722 W FR 9800722W WO 9845475 A1 WO9845475 A1 WO 9845475A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- domain
- sequence
- primer
- nucleic acid
- detection
- Prior art date
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
- C12Q1/6813—Hybridisation assays
- C12Q1/6816—Hybridisation assays characterised by the detection means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/14—Heterocyclic carbon compound [i.e., O, S, N, Se, Te, as only ring hetero atom]
- Y10T436/142222—Hetero-O [e.g., ascorbic acid, etc.]
- Y10T436/143333—Saccharide [e.g., DNA, etc.]
Definitions
- the present invention relates to means for detecting the hybridization of nucleic acids, which can be used in particular for diagnosis.
- Techniques for identifying RNA or DNA sequences are described in detail below.
- target sequences in a sample implement the hybridization of the target sequence with a labeled probe, and the detection of the duplex formed, after elimination of the non-hybridized probe.
- probes (generally larger than 100 bases) and short probes, ranging in size from 10 to 30 bases long.
- the probes most commonly used in medical diagnosis are synthetic oligonucleotides conjugated to a marker, either by direct attachment to this marker, or by conjugation to a ligand; in the latter case, the detection is carried out by means of a marker fixed to this ligand.
- Radioactive or cold markers can be used.
- radioactive markers include, for example, in the case of radioactive markers, the 5 ′ labeling of synthetic oligonucleotides with the enzyme polynucleotide kinase with ⁇ 32 P ATP, or the incorporation of radioactive dCTP or dATP during labeling by nick translation.
- non-radioactive markers which can be incorporated chemically into synthetic oligonucleotides (PCT application WO 89/12462)
- Biotinylated analogs of UTP can also be incorporated by cleavage translation into double-stranded DNA.
- Biotin is generally detected through its binding to avidin, which itself serves as an attachment support for fluorescent molecules, enzymes or other detectable compounds.
- haptens dinitrophenyl group, digoxigenin
- specific labeled antibodies serve as developers of the system.
- the sensitivity of molecular hybridization tests is an important factor which is often limiting in the application of diagnostic tests in molecular biology.
- the sensitivity of a test depends directly on the labeling used to reveal the hybridized probe.
- One of the ways to improve the sensitivity of a test is to amplify the signal by increasing the number of markers incorporated into the probe, in order to obtain so-called "polymarked" probes.
- terminal-transferase enzyme which is capable of extending a single-stranded DNA chain by the addition at its 3 ′ end of nucleotide analogs, for example biotinylated nucleotides .
- nucleotide analogs for example biotinylated nucleotides .
- the main drawback of this method is that the number of nucleotides added by the enzyme to the end of the single-stranded DNA chain is random. This results in a mixture of products of different lengths, which makes the marking difficult to reproduce, and produces heterogeneous probes, difficult to standardize and therefore not suitable for medical diagnosis.
- COLLINS (Application EP 204 510) proposes a variant in which the probe is extended by a homopolymeric tail (poly A) using the enzyme terminal transferase.
- the marker then consists of a homopolymer (poly T) in which are incorporated detectable molecules. This system does not, however, completely eliminate the drawbacks resulting from the inability to control the action of the enzyme.
- US Patent 4,882,269 describes a system in which polymarked secondary probes hybridize to several sites of a primary probe.
- the object of the present invention is to propose a system allowing the amplification of a hybridization signal, devoid of the drawbacks mentioned above, and simple to obtain, to purify and to use, in particular in the context of simultaneous detection. of several nucleic acid sequences.
- the inventors came up with the idea of using, as labeled detection probes, nucleic acid molecules of particular structure, which until now have only been used as amplification products of a sequence. target, intended to be fixed on a solid support, then detected by conventional methods, for example by means of a probe.
- nucleic acid molecules are described by NEWTON et al. [Nucleic Acids Res., 21, pp. 1155-1162, (1993)], as well as in Application EP 416 817 in the name of IMPERIAL CHEMICAL INDUSTRIES PLC. They are in the form of a double-stranded domain (which is a copy of the target sequence), provided at at least one of its ends with a single-stranded tail, which makes it possible to fix the molecule on a solid support, or to visualize it, via a labeled probe complementary to said tail. The double-stranded domain is separated from the single-stranded tail by a region comprising a stop block.
- nucleic acid molecules are obtained by polymerase chain reaction (PCR amplification) of the target sequence using primers comprising a nucleotide sequence capable of hybridizing to said target sequence, and a polynucleotide tail, separated by a stop synth.
- primers comprising a nucleotide sequence capable of hybridizing to said target sequence, and a polynucleotide tail, separated by a stop synth.
- a “synthon” is a molecule (nucleotide analog or other) having the ability to be incorporated into a synthetic polynucleotide.
- a “stop synthon” is a synthon which further has the property of causing polymerase arrest when encountered on the template strand during a copy or elongation reaction of a polynucleotide.
- the present invention relates to the use of nucleic acid molecules having the structure: single-strand synthon stop region / double-strand region, described above as a probe for detecting a target sequence. More specifically, the subject of the present invention is a method for detecting at least one target nucleic acid sequence, characterized in that said target sequence is placed in the presence of at least one detection probe constituted by a molecule nucleic acid consisting of:
- a binding domain consisting of a simple polynucleotide -
- a visualization domain C constituted by a double-stranded polynucleotide, in which is incorporated at least one labeled nucleotide constituting a detection means, under conditions allowing the hybridization of the domain A of said nucleic acid probe with the sequence target, and in that the hybrid formed is detected via the domain C of said nucleic acid probe.
- a detection probe which can be used for implementing the method according to the invention is shown diagrammatically in FIG. 1.
- the size of the binding domain A of the detection probe is advantageously between 8 and 40 nucleotides in length, preferably 15 to 25 nucleotides.
- Domain B can be constituted by one or more stop synthons, identical or different; synthons which can be used as stop synthons are for example chosen from alkane diols, or any other compound such as those described for example by WILK et al. [Nucleic Acids Res., 18, pp. 2065-2068, (1990)], by KUBARENA et al. [Nucleic Acids Res., 20, pp. 4533-4538, (1992)], or in the publication of NEWTON et al. and in Application EP 416 817 cited above.
- synthons which can be used as stop synthons are for example chosen from alkane diols, or any other compound such as those described for example by WILK et al. [Nucleic Acids Res., 18, pp. 2065-2068, (1990)], by KUBARENA et al. [Nucleic Acids Res., 20, pp. 4533-4538, (1992)], or in the publication of NEWTON et al. and
- the detection means incorporated in domain C constitute a signal amplifier allowing the visualization of the detection probe.
- Detection means which can be used in the context of the present invention are, in general, markers, known in themselves, conventionally used for labeling nucleic acid probes in order to allow their visualization. They are in particular nucleotides or nucleotide analogs, which can be incorporated by a polymerase into an oligonucleotide chain, and which can be labeled so as to be detected either directly, for example in the case of labeling radioactive or by a fluorescent molecule, either indirectly, for example in the case of ligands, (such as biotin or a hapten), revealed by means of the attachment of labeled molecules (such as avidin or an antibody). They can also be introduced into the polynucleotide chain in the form of labeling precursors intended to be modified subsequently in order to produce the molecule emitting the visualization signal.
- At least 1/50, preferably at least 1/10, and quite preferably, at least 1/5, of the monomers constituting the double-strand C domain of the detection probe are nucleotides or the like. of labeled nucleotides, as defined above. These labeled monomers can be incorporated into only one of the strands of domain C; to obtain a higher marking and a higher signal, it is generally preferable to incorporate them in each of the two strands.
- the level of the signal generated by the detection probe also depends on the size of the double-stranded domain C; advantageously, this is between 0.1 and 50 kb, and preferably between 1 and 10 kb.
- sequence of the double-strand C domain is not essential, insofar as this polynucleotide has the sole function of allowing the visualization of the detection probe, thanks to the labeled nucleotides which are incorporated therein.
- the hybridization of domain A of the detection probe with the target sequence can be carried out directly; in this case, the domain A is chosen so that its sequence is complementary to the target sequence to be detected. You can also, if desired, use an adapter; in most cases this will not however be necessary, even if it is desired to detect several target sequences. Indeed, as will be seen below, it is very easy to simultaneously prepare detection probes differing from one another by the sequence of domain A.
- the method according to the invention is therefore particularly suitable for the simultaneous detection of several target sequences.
- these probes can simultaneously use several detection probes, differing from each other by the sequence of domain A; possibly, these probes can also differ from each other by the nature of the B domain (ie the number and / or the nature of the stop synthons). In addition, they can differ from each other by the sequence of domain C and / or, advantageously, by the nature of the labeling of the nucleotides incorporated in said domain. This allows for example to assign to each target sequence a specific display signal.
- the target sequence (s) to be detected can be fixed on a solid support.
- this solid support consists of a plurality of electrodes, for example microelectrodes arranged in a matrix, at least 2 of which each carry a different target sequence.
- the target sequence (s) are fixed on these electrodes using for example the methods described in PCT Application WO / 94/22889.
- Detection probes which can be used in accordance with the invention for the detection of a target sequence can be easily obtained by enzymatic synthesis by carrying out, using a polymerase, at least one primer containing at least one stop building block, in a suitable reaction mixture, comprising at least one labeled nucleotide or nucleotide analog.
- the present invention also relates to detection probes which can be used in accordance with the invention for the detection of a target sequence, as well as their preparation process.
- a method for preparing detection probes in accordance with the invention comprises at least one step during which at least one of the strands of domain C is synthesized by carrying out the elongation by polymerase in the presence of a template strand in a suitable reaction mixture, of a primer P 'comprising from 5' to 3 ': a domain A and a domain B as defined above, and a domain X consisting of a sequence capable of hybridizing to the template strand for initiate polymerization, and is characterized in that all or part of at least one of the triphosphate nucleotides of the reaction mixture is replaced by one of its labeled derivatives.
- the structure of the primer P ' is shown diagrammatically in FIG. 2.
- the labeled derivatives of nucleotides are incorporated by the polymerase into the neo-synthesized primer extension product, in place of all or part of the corresponding nucleotides. It is thus possible to obtain an important labeling of the domain C. For example, in the theoretical case of a 10 kb fragment, (that is to say 20,000 nucleotides if the fragment is double strand), if we replace 1/3 of thymidines triphosphates by a labeled analog, and considering that we have a sequence to be amplified in which the 4 bases are found in equal proportions, we obtain a fragment in which are incorporated more than 800 labeled monomers / strand.
- the polymerase extension is carried out in the presence of a second primer P "comprising a sequence capable of hybridizing to the elongation product of primer P.
- the elongation of the primer P is carried out until the polymerase encounters a stop building block present in the elongation product of the primer P"; the extension product of the primer P "can hybridize to the X domain of a primer P ', and serve as a matrix for the following elongation step.
- the reaction can be continued, and these steps repeated, according to the conventional scheme of polymerase chain reaction methods, until the desired quantity of detection probes in accordance with the invention is obtained.
- the method according to the invention may be implemented under the usual conditions of known methods of polymerase chain reaction (PCR).
- PCR polymerase chain reaction
- the matrix from which the double-stranded domain C is obtained can have any sequence, hereinafter called “neutral sequence", because it is in particularly totally independent of the target sequences which it is envisaged to detect using these probes.
- neutral sequence a sequence rich in bases A and T will preferably be chosen, this type of sequence is generally amplifying better than sequences rich in G and C.
- the A domain at 5 ′ of the primer P ′ must be chosen so as not to interfere in the elongation of the neutral sequence; in particular, it should not hybridize stably with it (which can easily be checked beforehand using sequence homology analysis software).
- This domain must also not exhibit sequence complementarity with the X domain of the same primer P ′, or with any region of the primer P ′′.
- the position of the primer P ′′ and of the X part of the 'primer P' on their respective matrices determines the size of the domain C. This can be very important. Indeed, different techniques known to those skilled in the art make it possible to easily obtain and with good yields, elongation fragments of several tens of kilobases [BARNES, Proc. Natl. Acad.
- the primer P “comprises at least the sequence capable of hybridizing to said template strand to initiate the polymerization; however, it can also comprise a domain A and a domain B as defined above, and therefore have the same structure as the primer P '. In this case, the domains A and B of the primers P' and P "can be identical or different.
- the problems of fidelity of DNA polymerases do not arise, insofar as the degree of homology between domain C and the “ neutral sequence "used as initial matrix does not play any role, and where only the length of the C domain and the number of markers which can be incorporated into it matter.
- a series of primers P ′ which are identical to each other with regard to the sequence of the domain X s ′ is used in the same reaction mixture. hybridizing with the neutral sequence, and differing from each other by the sequence of domain A, and optionally by the nature of domain B. This makes it possible to simultaneously prepare probes allowing the detection of several different target sequences. If it is desired to simultaneously prepare probes which also differ from each other at the level of the C domain, the reaction mixture can contain several “neutral sequences” and for each of them, the series of primers P ′ and primer P ′′ appropriate.
- a subject of the present invention is also a kit for the preparation of detection probes in accordance with the invention, characterized in that it comprises at least one primer P 'as defined above, a polynucleotide usable as a template for the extension of said primer, and a labeled nucleotide triphosphate.
- said kit also comprises a primer P ".
- the quality of the amplification products obtained is easily controllable by electrophoresis on agarose gel. If good amplification conditions are selected, only one band is observed on gel.
- the purified product is quantifiable by UV spectrometry or by assaying the incorporated marker.
- the implementation of the process in accordance with the invention makes it possible to obtain, in a simple and reproducible manner, marked detection probes having homogeneous characteristics, which are easy to quantify and to purify by conventional methods, and which have a very high specific activity, greater than that of the labeled probes usually obtained by cut translation.
- the detection probes according to the invention have the following advantages: - they have very rapid hybridization kinetics, corresponding roughly to the hybridization kinetics of the oligonucleotides; as in the case of oligonucleotides, this kinetics is essentially linked to their concentration in the medium and with respect to the target sequence; this makes it possible to easily define the hybridization and washing conditions necessary for the specificity of hybridization of the detection probes in accordance with the invention.
- the recognition domain C being in double-stranded form, it does not present any risk of cross hybridization with the target sequence and therefore, there is no problem of background noise.
- the amplification conditions were first developed with unmodified primers, that is to say without comprising the A and B domains. The amplification was then reproduced with the modified P 'primer comprising the three domains A, B and C.
- the amplification is carried out on 0.1 ⁇ g of human genomic DNA (CLONTECH), in the presence of 10 pmol of each of the primers, 2.5 units of Taq polymerase (CIS BIO INTERNATIONAL), 5 ⁇ l of 10 X buffer (Tris / 100 mM HCl, pH 9; KCl 500 mM; MgCl 2 15 mM; Triton XlOO 1%, BSA 2 mg / ml) CIS BIO INTERNATIONAL), 0.75 ⁇ l of each of the triphosphate nucleotides (20 mM solutions, BOEHRINGER MANNHEIM ).
- a single strip, of the expected length, is obtained.
- the primer J 15 (stop) 2 ⁇ makes it possible to amplify a fragment of 6023 bp when it is used with the primer ⁇ 6528 , and a fragment 10709 bp when it is used with the primer ⁇ 1 1214 .
- the XL PCR kit (PERK-IN ELMER) is used following the protocol recommended by the manufacturer and the technique of high-temperature starting (hot-start).
- the lower phase of the reaction medium is prepared in 500 ⁇ l thin-walled tubes (PERKIN-ELMER) according to the manufacturer's instructions. 40 pmoles of primers and 1.1 mM final in Mg (OAc) 2 are used .
- the lower phase is covered with wax (PERKIN-ELMER); the upper phase is then added.
- the amplification is carried out using 1 ng of phage ⁇ DNA.
- the amplification takes place according to the following protocol:
- the amplification products are checked after electrophoresis on 0.8% agarose gel and staining with ethidium bromide. Only one band of the expected length is observed.
- the amplification is carried out with the primers ⁇ 2 and ⁇ o stop) ⁇ on 1 ng of phage DNA ⁇ .
- the reagents are the same as in B, above.
- the amplification conditions are as follows:
- the amplification is controlled after electrophoresis on 0.6% agarose gel.
- oligonucleotide complementary to domain A of primer K 20 (stop) 2 ⁇ of sequence: 5 'TGG CAT GGT AGC CAC GTG 3' this oligonucleotide is labeled 5 ′ by the polynucleotide kinase, in the presence of ⁇ 32 P ATP. It is hybridized in solution for 10 minutes at 37 ° C. with 5 ⁇ l of the amplification product, in 1 ⁇ PBS buffer, 0.25 M NaCl. The hybridization product is separated by electrophoresis on 0.6 agarose gel %. The gel is dried and then autoradiographed for 1 night. The autoradiograph shows that the radioactivity is localized at the top of the gel at the level of the amplification band, as well as at the bottom of the gel, at the level of the labeled non-hybrid oligonucleotide.
- the target is a 30-base-long RNA obtained by in vitro transcription and the sequence of which is as follows: 5 'UUG CCU GGA CGA CCG GGU CCU UUC UUG GAG 3'. 10 to 10 dilute solutions are prepared. The undiluted solution is considered to be solution 1.
- the detection of the target is done by sandwich hybridization using a capture probe fixed on a microcarrier, and an oligonucleotide (G4) which is either labeled with a biotin, thus constituting a detection probe of conventional type, used for comparison. , or highlighted using a detection probe according to the invention.
- G4 oligonucleotide
- the oligonucleotide G4 the sequence of which is as follows: 5 ′ GGT CGT CCT GGC AAT 3 ′ is labeled with a biotin at its 5 ′ end according to the method described in PCT Application WO / 89/12462, or else added with a additional sequence (sequence I 15 ) at its 3 'end.
- the sequence I 15 5 'ATC CGT TCT ACA GCC 3' hybridizes specifically to an oligonucleotide (cI 15 cJ 15 ), part of which is complementary to I 15 and part of which is complementary to the sequence J 15 .
- the assembly G4 I 15 + cl 15 cj 15 plays the role of an adapter.
- the detection probe according to the invention is obtained by PCR amplification of a fragment of human DNA with the primers J 15 (stop) 2 H 1217 o and H 13180 (see example 1A).
- the reaction medium contains 0.1 ⁇ g of human DNA in Taq IX buffer (CIS BIO INTERNATIONAL), with 2.5 U of Taq DNA polymerase (CIS BIO INTERNATIONAL) and 6 pmol of each of the primers.
- the nucleotide triphosphates are at 300 nM except for dTTP which is at 240 nM.
- the amplification medium also contains 60 nM of bio-16-dUTP (BOEHRINGER-MANNHEIM, France).
- the amplification conditions are as follows: 94 ° C 5 min., Then 35 cycles, 94 ° C 1 min., 60 ° C 1 min. 30 and 70 ° C 1 min. 30 and a final elongation 5 min. at 70 ° C. A double-stranded fragment of 1010 base pairs is thus obtained in which approximately 1/5 of the thymidines are replaced by biotinylated uridines.
- the amplification is controlled on 1% agarose gel. A single strip of expected size is obtained. The fragment is purified on a SEPHACRYL®HR column (MICROSPIN TM S400, PHARMACIA). Hybridization on a chip:
- the chip has 48 square electrodes with a side of 50 ⁇ m.
- the capture probe Gc the sequence of which is as follows: 5 'CTC CAA GAA AGG ACC C 3' and 2 oligonucleotides of different sequence (T1 and T2), used as controls, are each fixed on an electrode by their ends 5 ', by copolymerization with pyrrole, according to the process described in PCT Application WO / 94/22889.
- the hybridizations take place in 1 hour at 45 ° C. in a PBS I X buffer, 0.5 M NaCl, 10 mM EDTA, 2.5 X DENHARDT containing 100 ⁇ g / ml of sonicated herring sperm DNA.
- the hybridization solutions are heated for 3 min. at 80 ° C. in microtubes in the presence of the RNA to be assayed, then transferred to a hybridization bag in which the chip is placed.
- Detection with biotinylated G4 oligonucleotide is Detection with biotinylated G4 oligonucleotide:
- the hybridization of the target RNA on the chip is carried out in 20 ⁇ l of 1 X buffer containing 1 ⁇ l of the A N solution to be tested and 15 pmol of the oligonucleotide G4 labeled with biotin. 3 rinses are then carried out in 1 X PBS buffer, containing 0.5 M NaCl and 0.05% Tween 20.
- the chip is then incubated for 10 minutes in a solution of streptavidin-phycoerythrin at 5 ng / ⁇ l in PBS / NaCl / Tween, then rinsed in the washing buffer.
- the chip is mounted on a slide and under a coverslip in a drop of PBS / NaCl / Tween buffer.
- the signal is recorded, after irradiation at 500-550 nm for 1 second, by a microscope coupled to a CCD camera.
- Detection with the detection probe according to the invention It takes place in 2 stages. a) hybridization with the adapter:
- RNA to be tested (1 ⁇ l) is first hybridized on the chip with 25 pmol of the oligonucleotide I] 5 G 4 and 25 pmol of the oligonucleotide cI 15 cJ 15 .
- the chip is treated 2 x 5 minutes in a 0.1 N NaOH solution and rinsed with distilled water.
- b) hybridization with the detection probe After a rapid rinsing in the PBS / NaCl / Tween buffer, the chip is transferred to a second hybridization bag containing 10 ⁇ l of the detection probe according to the purified invention and 10 ⁇ l 2 X hybridization buffer. Rinses, streptavidin-phycoerythrin development, and signal recording are performed as described above. Signals are recorded after 1 second irradiation. Results
- the signal on each electrode is quantified in arbitrary units of fluorescence (UAFs); the signal range is linear from 0 to 250 UAFs.
- UAFs fluorescence
- the control electrodes carrying the oligonucleotides T1 and T2 give signals between 4 and 10 UAFs (results not shown in the table), which corresponds to the background noise.
- a signal of 250 UAFs corresponds, under the conditions used, to a saturation of the reading system.
- the signal obtained with the oligonucleotide G4 labeled with a single biotin decreases very quickly when the dilution increases, while the use of a detection probe according to the invention allows a higher signal to be obtained. , and further clearly increases the sensitivity of the test.
- the background noise in the presence of the detection probe according to the invention, or of the conventional probe constituted by the biotinylated oligonucleotide G4, is the same.
- a detection probe according to the invention and labeled with digoxigenin is prepared according to the protocol described in example 1 A) above, replacing 1/5 of the dTTPs with digoxigenin-1 l-2'- deoxy-uridine-5'-triphosphate (BOEHRINGER-MANNHEIM).
- oligonucleotide G4 DIG oligonucleotide G4 labeled with digoxigenin at its 5 ′ end and purified by HPLC.
- the target consists of RNA as in the previous example. Dilutions of the target are made from 10 to 10. This target is fixed on a microplate coated with streptavidin (LABSYSTEM) via the biotin-labeled Gc capture probe. Hybridization with G4 DIG
- the target A N is incubated in 50 ⁇ l of PBS / NaCl buffer containing 30 pmol of G4 DIG and 40 pmol of biotinylated Gc capture probe.
- the solutions are heated for 3 minutes at 80 ° C. and then transferred to the wells. Incubate for 1 hour at 42 ° C. After 3 washes with the PBS / NaCl / Tween buffer, incubation is carried out for 1 hour at 37 ° C. with the anti-DIG antibody labeled with peroxidase (stock solution at 75 U / ml, BOEHRINGER-MANNHEIM, diluted to 1/2000 in PBS / NaCl containing 3% BSA).
- RNA to be tested is first hybridized in 50 ⁇ l of PBS / NaCl / Tween buffer containing 40 pmol of Gc-biotin probe, 40 pmol of I 15 G4, and 40 pmol of cl 15 cj 15 .
- the solutions are denatured for 3 minutes at 80 ° C. and then transferred to the wells of the microplate. Incubation takes place for 1 hour at 42 ° C. Three washes with PBS / NaCl / Tween are carried out and then the incubation is carried out with the detection probe.
- b) hybridization with the detection probe is carried out with the detection probe:
- the wells are incubated in the dark, in the presence of 50 ⁇ l of peroxidase substrate (O-phenylenediamine, in citrate-phosphate buffer, pH 5.5, containing 0.02% H 2 O 2 ) .
- the reaction is stopped after 10 minutes for the amplifier system and 30 minutes for the controls, with 50 ⁇ l of 1 M oxalic acid.
- the optical density is read at 492 nm.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98920600A EP0973947A1 (fr) | 1997-04-09 | 1998-04-09 | Systemes de detection d'hybridation d'acides nucleiques, leur procede de preparation et leurs utilisations |
US09/402,764 US6210932B1 (en) | 1997-04-09 | 1998-04-09 | System for detecting nucleic acid hybridization, preparation method and application thereof |
JP54246798A JP2001518787A (ja) | 1997-04-09 | 1998-04-09 | 核酸ハイブリッド形成検知システムおよびその調製法と応用 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR97/04328 | 1997-04-09 | ||
FR9704328A FR2762013B1 (fr) | 1997-04-09 | 1997-04-09 | Systemes de detection d'hybridation d'acides nucleiques, leur procede de preparation et leurs utilisations |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998045475A1 true WO1998045475A1 (fr) | 1998-10-15 |
Family
ID=9505675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1998/000722 WO1998045475A1 (fr) | 1997-04-09 | 1998-04-09 | Systemes de detection d'hybridation d'acides nucleiques, leur procede de preparation et leurs utilisations |
Country Status (5)
Country | Link |
---|---|
US (1) | US6210932B1 (fr) |
EP (1) | EP0973947A1 (fr) |
JP (1) | JP2001518787A (fr) |
FR (1) | FR2762013B1 (fr) |
WO (1) | WO1998045475A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2809417B1 (fr) * | 2000-05-24 | 2004-07-30 | Commissariat Energie Atomique | Detection et caracterisation de l'activite de proteines impliquees dans la reparation de lesions de l'adn |
US7189509B2 (en) * | 2001-08-16 | 2007-03-13 | Zhifeng Shao | Analysis of gene expression profiles using sequential hybridization |
US20100184614A1 (en) * | 2007-05-23 | 2010-07-22 | Zheng Ye | Microarray systems and methods for identifying dna-binding proteins |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0416817A2 (fr) * | 1989-09-06 | 1991-03-13 | Zeneca Limited | Procédé d'amplification |
EP0501356A1 (fr) * | 1991-02-28 | 1992-09-02 | Roche Diagnostics GmbH | Détection de bactéries avec amplification d'acides nucléiques |
WO1996006946A1 (fr) * | 1994-08-26 | 1996-03-07 | Igen, Inc. | Biocapteur et procede destines a la detection par luminescence electrophotochimique d'acides nucleiques adsorbes sur une surface solide |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2626980B2 (ja) * | 1987-05-02 | 1997-07-02 | 湧永製薬株式会社 | ポリヌクレオチド検出用プローブ |
-
1997
- 1997-04-09 FR FR9704328A patent/FR2762013B1/fr not_active Expired - Fee Related
-
1998
- 1998-04-09 WO PCT/FR1998/000722 patent/WO1998045475A1/fr not_active Application Discontinuation
- 1998-04-09 EP EP98920600A patent/EP0973947A1/fr not_active Withdrawn
- 1998-04-09 US US09/402,764 patent/US6210932B1/en not_active Expired - Fee Related
- 1998-04-09 JP JP54246798A patent/JP2001518787A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0416817A2 (fr) * | 1989-09-06 | 1991-03-13 | Zeneca Limited | Procédé d'amplification |
EP0501356A1 (fr) * | 1991-02-28 | 1992-09-02 | Roche Diagnostics GmbH | Détection de bactéries avec amplification d'acides nucléiques |
WO1996006946A1 (fr) * | 1994-08-26 | 1996-03-07 | Igen, Inc. | Biocapteur et procede destines a la detection par luminescence electrophotochimique d'acides nucleiques adsorbes sur une surface solide |
Non-Patent Citations (1)
Title |
---|
NEWTON C. R. ET AL.,: "The production of PCR products with 5' single-stranded tails using primers that incorporate novel phosphoramidite intermediates", NUCLEIC ACID RESEARCH, vol. 21, no. 5, - 1993, pages 1155 - 1162, XP002052476 * |
Also Published As
Publication number | Publication date |
---|---|
FR2762013A1 (fr) | 1998-10-16 |
FR2762013B1 (fr) | 1999-06-04 |
JP2001518787A (ja) | 2001-10-16 |
US6210932B1 (en) | 2001-04-03 |
EP0973947A1 (fr) | 2000-01-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0787209B1 (fr) | Procede d'amplification de sequences d'acide nucleique par deplacement, a l'aide d'amorces chimeres | |
CA2239287C (fr) | Reaction d'amplification en cascade d'acide nucleique | |
CA2582809A1 (fr) | Amplification par replique de reseaux d'acides nucleiques | |
JPH11504517A (ja) | オリゴヌクレオチドの化学結合による核酸検出及び増幅 | |
JPH11510709A (ja) | 最適蛍光オリゴヌクレオチド | |
KR20010012175A (ko) | 폴리뉴클레오티드의 2단계 혼성화 및 포획법 | |
JP2003000286A (ja) | 溶液相サンドイッチハイブリダイゼーションアッセイに用いるためのhivプローブ | |
HUE032212T2 (en) | Polymer chain reaction detection system using oligonucleotides containing phosphorothioate group | |
FR2779154A1 (fr) | Procede d'amplification d'au moins une sequence nucleotidique particuliere et amorces de mise en oeuvre | |
EP1112378A1 (fr) | Procedes de detection et de mappage de genes, de mutations et de sequences de polynucleotides du type variant | |
FR2949120A1 (fr) | Procede de detection d'un adn circularise et utilisation de ce procede pour la detection de mutations | |
EP1283911B1 (fr) | Detection et caracterisation de l'activite de proteines impliquees dans la reparation de lesions de l'adn | |
WO1998045475A1 (fr) | Systemes de detection d'hybridation d'acides nucleiques, leur procede de preparation et leurs utilisations | |
JPH0923899A (ja) | 塩基配列増幅方法 | |
EP1017855B1 (fr) | Synthetisation de polynucleotides par ligature d'oligomeres multiples | |
WO2003044228A1 (fr) | Procede ameliore de discrimination d'amorces dans une extension d'amorce specifique d'allele | |
WO1996003526A1 (fr) | Procede d'amplification d'acide nucleique a l'aide d'un nucleoside modifie, et detection du produit d'amplification a l'aide d'anticorps | |
EP0775217B1 (fr) | Méthode d'amplification et/ou de détection d'une séquence d'acide nucléique, réactif de détection et leurs applications | |
EP0353124B1 (fr) | Procédé de marquage d'une sonde nucléique et trousse de réactifs pour la mise en oeuvre de ce procédé | |
EP1794320B1 (fr) | Méthode pour générer des transcrits | |
EP2081948B1 (fr) | Nouvel oligonucleotide marque | |
JP2002360247A (ja) | 核酸固定化物 | |
FR2809105A1 (fr) | Amorces d'amplification modifiees et leurs utilisations | |
Lowe | ACID REPEAT SEQUENCES BY $8 $8 2i DISCONTINUOUS PRIMER EXTENSION | |
FR2778414A1 (fr) | Procede pour le sequencage de polymeres d'acides nucleiques |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1998920600 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 1998 542467 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09402764 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1998920600 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1998920600 Country of ref document: EP |