EP0419648A1 - Sequences nucleotidiques d'actinomycetales, applications a la synthese ou a la detection d'acides nucleiques, produits d'expression de ces sequences et application en tant que compositions immunogenes - Google Patents
Sequences nucleotidiques d'actinomycetales, applications a la synthese ou a la detection d'acides nucleiques, produits d'expression de ces sequences et application en tant que compositions immunogenesInfo
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- EP0419648A1 EP0419648A1 EP90907137A EP90907137A EP0419648A1 EP 0419648 A1 EP0419648 A1 EP 0419648A1 EP 90907137 A EP90907137 A EP 90907137A EP 90907137 A EP90907137 A EP 90907137A EP 0419648 A1 EP0419648 A1 EP 0419648A1
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- European Patent Office
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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
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
- C12Q1/689—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms for bacteria
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
- C07K14/35—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria from Mycobacteriaceae (F)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
Definitions
- NUCLEOTIDE SEQUENCES OF ACTINOMYCETALS, APPLICATIONS FOR THE SYNTHESIS OR DETECTION OF NUCLEIC ACIDS, EXPRESSION PRODUCTS OF SUCH SEQUENCES AND APPLICATION AS IMMUNOGENIC COMPOSITIONS.
- the present invention relates to nucleotide sequences of actinomycetals, in particular mycobacteria, to oligonucleotides included in said sequences, to their applications as primers for the synthesis of actinomycetal DNA and as probes for the detection of DNA and / or actinomycetal transcripts, in particular mycobacteria, to the expression products of said sequences, to their applications and to the antibodies directed against said products, to a method for detecting and identifying actinomycetals and its applications, as well as immunogenic compositions comprising said expression products.
- Tuberculosis and leprosy are known to be major public health problems. There are currently about 60.10 6 individuals with TB in the world (with an annual mortality of 3.10 6), and about 15.10 6 individuals with leprosy. In France, there are approximately 10 4 new cases of tuberculosis per year.
- BCG vaccination Bacille Calmette and Guérin, an attenuated strain of M. bovis
- This effectiveness varies from around 80% in Western countries such as England to 0% in India (results of the last Chingleput vaccination trial). The appearance of strains of M.
- tuberculosis resistant to the usual anti-tuberculosis drugs and the existence of mycobacteriosis due to other increasingly common mycobacteria such as M. avium, in particular in people with immunosuppression (AIDS in the greatest number of cases), add to the urgency of developing a rapid method for the detection and identification of mycobacteria.
- tuberculosis and other related mycobacteriosis are difficult to make; in fact, the germs responsible for these diseases are often present in small quantities and when they are in quantities detectable by the conventionally used methods, the disease is already evolving and the patients are contagious to those around them. Because of the very long generation time of these bacteria (24 h for M. tuberculosis compared to 20 min for E. coli), the culture of these organisms is difficult. Thus it takes 6 to 8 weeks to identify the germs and more to obtain an antibiogram usable for the adequate treatment of the patients. The need for a detection test which does not require the culture of germs and which can be directly used with pathological samples even when the germs are present at low concentrations therein is essential.
- Serological techniques may prove useful under certain conditions, but their use is limited by their low sensitivity and / or specificity (DANIEL T.M. et al., Am. Rev. Respir. Dis., 1987,
- the presence or absence of mycobacteria can also be determined by hybridization with DNA or RNA using probes specific for DNA sequences (KIEHN TE et al., J. Clin. Microbiol., 1987, 25, 1551-1552; ROBERTS MC et al., J. Clin. Microbiol., 1987, 25, 1239-1243; DRAKE TA et al., J. Clin. Microbiol., 1987, 25, 1442-1445).
- these methods also require the cultivation of microorganisms.
- M. tuberculosis Bact., 1987, 169 , 1080-1088 and which describes the genes of M. tuberculosis coding for protein antigens and in particular for the 65 kDa antigen.
- This International Application specifies, in particular, that the antigens of M. tuberculosis coding for five immunologically active proteins have been isolated by screening systematization of a recombinant DNA library expressed in a lambda gt11 bacteriophage, with a collection of monoclonal antibodies directed against the protein antigens of this bacterium.
- One of the antigens of M. tuberculosis, a 65 kDa protein has determinants common to M. tuberculosis and M. leprae.
- PCT International Application WO 88/06591 which in particular has the co-inventor T. SHINNICK, describes a recombinant protein of 540 amino acids (65 kDa protein) as well as the DNA sequence and the expression vectors of said protein , as well as the applications of said recombinant protein. This Application also describes peptides corresponding to sequences of this protein and their applications.
- the genes encoding the proteins of other mycobacteria were also isolated. Mention may in particular be made of THOLE et al. (Infect. Immunol., 1987, 55, 1466-1475), who described a 64 kDa protein from M. bovis BCG expressed in E. coli.
- the present invention has therefore given itself the aim of providing a detection and identification method making it possible to detect small quantities of DNA extracted from germs themselves present in a limited number, which is rapid and allows identification of an actinomycetal infection and in particular a mycobacterial infection, a Nocardia infection or a Rhodococcus infection, directly in pathological samples, without having to carry out a culture.
- the subject of the present invention is a nucleotide sequence derived from actinomycetals, characterized in that it consists of a homologous sequence of a gene common to actinomycetals chosen from the group which includes the mycobacteria, Nocardia and Rhodococcus, inside of which there are conserved regions and variable regions and in that it comprises between 250 and 500 base pairs.
- nucleotide sequence means both a double-stranded DNA sequence, a single-stranded DNA sequence and the transcripts of said DNA sequences.
- actinomycetales is understood to mean both actinomycetaceae such as Nocardia, as well as mycobacteriaceae or Rhodococcus.
- the group of the bacillus of tuberculosis is called the group which comprises M. bovis BCG, M. bovis, M. tuberculosis, M. africanum and M. microti; we call group MAIP, the group which includes M. avium, M. intracellulare and M. paratuberculosis.
- said sequence has at least 80% homology with the gene coding for the mycobacterial antigen of 65 kDa.
- said sequence comprises 383 base pairs homologous in at least 8 species of mycobacteria, namely: M. tuberculosis, M. avium, M. fort uitum, M. paratuberculosis, BCG, M. kansasii, M. malmoense and M. marinum.
- the 383 base pairs correspond to the amino acid sequence expression product of the following formula (I):
- X 1 is zero or represents the sequence ASP-PRO
- X 2 represents LYS or GLU
- X 3 represents GLY or ALA
- X4 represents GLY or ARG
- X 5 represents ALA or VAL
- X 6 represents ALA or ARG
- X 7 represents ARG or LYS
- X 8 represents PRO or LEU
- X 9 represents GLY or SER
- X 10 represents LEU or PHE
- X 11 represents ARG or CYS
- X 12 represents LYS or ALA
- X 13 represents GLU or ALA
- X 14 represents THR or LYS
- X 15 represents LYS or ASP
- X 16 represents SER, GLY, PRO or THR
- X 17 represents ASP or GLU
- X 18 represents ALA, GLY or VAL
- X 19 represents ALA or VAL
- X 20 represents GLN or ALA
- X 21 represents ASP or GLU
- X 22 represents LEU or PRO
- X 23 represents ALA or VAL
- X 24 represents GLU or ASP
- X 25 represents ALA or GLY
- X 26 represents ASN or LYS
- X 27 represents VAL or SER
- X 28 represents GLU or GLY
- X 29 is zero or represents the sequence ASN-THR-PHE-GLY-
- said sequence comprises 343 base pairs, corresponds to formula (II) below:
- Said fragment comprises in particular the following restriction sites:
- said sequence comprises 343 nucleotides, corresponds to formula (III) below:
- Said fragment comprises in particular the following restriction sites:
- said sequence comprises 343 nucleotides, corresponds to formula (IV) below:
- Said fragment notably includes the sites of following restrictions:
- said sequence comprises 343 nucleotides, corresponds to formula (V) below:
- Said fragment comprises in particular the following restriction sites:
- said sequence comprises 343 nucleotides, corresponds to formula (VI) below:
- Said fragment comprises in particular the following restriction sites:
- said sequence comprises 343 nucleotides, corresponds to formula (VII) below:
- Said fragment comprises in particular the following restriction sites:
- said sequence comprises 343 nucleotides, corresponds to formula (VIII) below:
- Nocardia asteroides corresponds to a fragment of Nocardia asteroides, similar to the sequence of the mycobacterial gene coding for the 65 kDa antigen.
- Said fragment comprises in particular the following restriction sites:
- the present invention also relates to oligonucleotides, characterized in that they consist of a fragment of a nucleotide sequence according to the invention.
- Such a sequence corresponds in particular to the base sequence 397-416 after the start codon of the "+" strand of the gene coding for the 65 kDa antigen from the group of tuberculosis bacilli; this sequence is hereinafter called -TB-1;
- Such a sequence is complementary to the base sequence 535-554 after the start codon of the "+" strand of the gene coding for the 65 kDa antigen from the group of tuberculosis bacilli; this sequence is hereinafter called TB-2;
- TB-4 5 'CGAAATCGCTGCGGTGGCCG (XII) which sequence makes it possible to recognize the bacilli of tuberculosis and is hereinafter called TB-4;
- oligonucleotide characterized in that it has the following sequence of formula (XIII):
- this oligonucleotide advantageously comprises a unique restriction site Bgl1;
- TB-10 3 'CGAAATCGCTGCGGTGGCCGCAATCTGCTC 5' (XVIII), which sequence makes it possible to recognize the bacilli of the tuberculosis group and is hereinafter called TB-10.
- said oligonucleotides are obtained by synthesis, in particular using an apparatus marketed by APPLIED BIOSYSTEMS (USA).
- the present invention also relates to pairs of primers for the synthesis of a DNA or of an RNA of actinomycetal, characterized in that each primer comprises a sequence or a fragment of nucleotide sequence as defined above.
- Such primers allow the synthesis of a DNA or RNA sequence or a fragment thereof present in a gene coding for an antigen present in all actinomycetales and in particular the gene coding for the 65 antigen. kDa.
- pairs of primers they advantageously consist of an oligonucleotide of formula (IX) (TB-1) paired with an oligonucleotide of formula (X) (TB-2).
- pairs of primers they are advantageously constituted with an oligonucleotide of formula (XV) (TB-7) paired with an oligonucleotide of formula (XVI) (TB-8).
- the primers TB-1 and TB-2 allow the synthesis of a DNA or RNA sequence present in mycobacteria or related like Nocardia or Rhodococcus.
- the present invention also relates to nucleotide probes, characterized in that they comprise a nucleotide sequence or a fragment thereof as defined above, optionally labeled with the aid of a marker such as an isotope radioactive, an appropriate enzyme, a fluorochrome, an antibody or a basic analog such as that described in French patent n ° 81 24131.
- a marker such as an isotope radioactive, an appropriate enzyme, a fluorochrome, an antibody or a basic analog such as that described in French patent n ° 81 24131.
- said probe is chosen from the group which comprises the oligonucleotides of formulas XI (TB-3), XII (TB-4), XIII (TB-5), XIV (TB-6 ), XVII (TB-9), XVIII (TB-10), XIX (TB-11) and XX (TB-12).
- the TB-6 probe makes it possible in particular to detect M. fortuitum; probes TB-5 and TB-11 are used to detect mycobacteria from the MAIP group; the probes TB-3, TB-4, TB-9 and TB-10, make it possible to detect mycobacteria of the group of bacilli of tuberculosis and the probe TB-12 makes it possible to detect M. kansasii.
- the present invention also relates to the peptides or fragments of peptides encoded by any one of the sequences defined above. We can notably cite:
- the present invention also relates to polyclonal or monoclonal antibodies, characterized in that they are obtained by immunization of an appropriate animal with a peptide or a peptide fragment in accordance with the invention.
- Such antibodies can in particular find application for the demonstration of the presence of mycobacteria in an appropriate sample obtained from a patient to be tested, according to a known method of ELISA or RIA type.
- the present invention also relates to a method for rapid detection and identification by amplification and hybridization, of small quantities of actinomycetals chosen from the group which includes the mycobacteria, Nocardia and Rhodococcus, possibly present in a biological sample suitably treated to extract DNA and / or the transcription products of said actinomycetales, which method is characterized in that said sample:
- (1) is brought into contact with a pair of primers according to the invention, to amplify at least one fragment of said DNA or RNA,
- the method implemented in (1) is in particular one of the genetic amplification techniques such as the so-called Q ⁇ replicase method (LIZARDI P.M. et al.,
- Such a method has the advantage of making it possible to carry out a specific, direct and rapid test, distinguishing the different groups of actinomycetals and in particular of mycobacteria by using, on the one hand, non-specific primers which amplify a DNA fragment or RNA and using, on the other hand, group or gender specific probes.
- said method further comprises:
- the restriction enzyme is advantageously chosen from the group which comprises BanI and BglI.
- Such an embodiment has the advantage of allowing the detection of a genus or group of actinomycetales.
- the detection of the DNA or amplified RNA sequence is carried out using two appropriate nucleotide probes, said method further comprising:
- the DNA is isolated from the biological sample, during a step prior to the detection and identification steps, by suspending the centrifugation pellet of said biological sample, in an appropriate lysis solution, followed by an incu bation at about 95 ° C, for a suitable time, itself followed by the addition to the medium, of a buffer solution, after which the DNA is extracted by appropriate extraction means.
- the lysis solution used is a 0.1N NaOH solution, 2M NaCl, 0.5% SDS.
- the incubation is carried out at a temperature of approximately 95oC for approximately 15 minutes.
- the present invention further relates to a kit, box or coordinated set, ready to use for the implementation of the method for detecting at least one actinomycetal, in particular at least one mycobacterium, characterized in that that it comprises, in addition to the useful quantities of buffers and of reagents suitable for carrying out said detection:
- the invention also comprises other arrangements, which will emerge from the description which follows, which refers to examples of implementation of the method which is the subject of the present invention.
- Example 1 Screening and comparative identification of M. tuberculosis, M. bovis, M. avium and M. fortuitum.
- the biological extracts are treated as appropriate, then centrifuged.
- the centrifugation pellet is resuspended in 50 ⁇ l of 0.1 N NaOH containing 2 M NaCl and 0.5% SDS, incubated at 95 ° C. for 15 min (occasional gentle shaking), then after the addition of 0.4 ml of 0.1 M Tris- HCl at pH 7, the DNA is extracted by three passages in a phenol / chloroform mixture, precipitated with ethanol and dissolved in 50 ⁇ l of Tris -HCl 10 mM at pH 8 containing 0.1 mM EDTA.
- the amplification is carried out as described in SAIKI et al. (Science, 1988, 239, 487-491), as well as in European Patent Application No. 200,362: 0.1 ml of a reaction mixture containing: 50 mM KCl, 10 mM Tris-HCl (pH 8, 3), 1.5-2.4 mM of MgCl 2 , 100 ⁇ g / ml of gelatin, 300 ⁇ M of deoxyribonucleotides (mixture of the 4 deoxyribonucleotides dA, dG, dC and dl), 50 ⁇ M of the primers in accordance with the invention called TB-1 and TB-2, two units of Taq polymerase and 10-50 ⁇ l of an extract of a mixture of human cells and mycobacteria or 50 ng of DNA extracted from mycobacteria is maintained at 94oC (1.5 min ), 50 ° C (2 min) and 72 ° C (2 min) for approximately 40 cycles. After the last
- Filters with the DNA are then washed in a 2X SSPE solution (the 20X SSPE solution corresponds to: 3.0 M NaCl, 200 mM NaH 2 PO 4 and 20 mM EDTA) then treated with a prehybridization mixture at 63 ° C in a solution comprising 5X SSPE and 5X Denhardt (an IX Denhardt solution corresponds to: 0.02% Ficoll, 0.02% polyvinylpyrrolidone and 0.02% bovine serum albumin) for 2 hours then hybridized in the same solution containing three probes in accordance with the invention TB-4, TB-5 and TB-6 marked at their 5 ′ end at 32 p (2.10 5 cpm / ml, specific activity 1-3 ⁇ Ci / pmole) overnight at 63 ° C.
- the blots or deposits obtained are washed for 2 hours at room temperature in a 0.1X SSC solution (IX SSC corresponds to 0.15 M NaCl and 0.015 M Na citrate) containing 0.5% SDS, 2 to 4 minutes at 67-72 ° C in a solution of 5X SSPE containing 0.5% SDS and 2 hours at room temperature in 0.1X SSC containing 0.5% SDS.
- the deposits obtained are dried and any hybrids present are revealed by exposure to an XAR-5 film.
- FIG. 1 shows the hybridization of the amplified DNA of M. bovis (B), M. avium (A) and M. fortuitum (F) with the specific probes TB-4, TB-5 and TB-6, respectively.
- Example 2 Comparison of the sequences obtained in Example 1 with the DNA sequences as described in the literature.
- the DNA is extracted with phenol, precipitated with ethanol and redissolved in 10 mM Tris-HCl (pH 8) containing 1 mM EDTA.
- the DNA is then digested with the restriction endonucleases PstI and BamHI, cloned into phages M13mp18 and M13mp19 and sequenced according to the SANGER method using T7 polymerase or Taq polymerase in the presence of d-azaGTP in place of the dGTP.
- the amplified DNA corresponds to the expected region of the gene coding for the 65 kDa mycobacterial antigen as shown in FIG. 2, in which the DNA sequences of the amplified fragments obtained from the gene coding for the antigen 65 are specified. kDa from M. bovis, M. avium, M. paratuberculosis and M. fortuitum.
- the sequence of the amplified DNA of M. bovis is identical to the corresponding region of the sequence coding for the 65 kDa antigen of M. bovis (THOLE et al. 1987) and M. tuberculosis (SHINNICK et al. 1987).
- the DNA sequences amplified from M. avium, M. paratuberculosis and M. fortuitum are very similar to those of M. bovis, M. tuberculosis and the deduced translation products corresponding to these sequences are also very similar to l 'antigen
- FIG. 3 shows a certain number of restriction sites for the 343 nucleotide fragments included in the gene coding for the 65 kDa antigen of M. avi um (FIG. 3a), M. fortuitum (FIG. 3b), M. paratuberculosis ( figure 3c), M. bovis BCG (figure 3d).
- Example 3 Evolution of the sensitivity of the method.
- the sensitivity of the method was tested using BCG diluted in a biological medium, pleural fluid. It was possible to detect about 10 bacilli per ml of liquid; this represents a considerable improvement compared to direct examination tests, which require 10 3 to 10 4 bacilli / ml for the detection of mycobacteria, without identification.
- this test can be performed much faster than the detection and identification of mycobacteria after enrichment and culture.
- FIG. 4 shows the results obtained from DNA extracted from samples containing 10 6 human blood mononuclear cells and 6.10 5
- Example 4 Detection of amplified sequences of the group of tuberculosis bacilli by the restriction test of an oligonucleotide.
- the gel is then exposed to an X-ray film for 3-18 hours and the positive samples identified by the presence of a band corresponding to the 11 ′ nucleotide fragment 5 ′ of the oligonucleotide TB-9, produced by the cleavage of TB -9 by the restriction enzyme.
- Example 5 Synthesis of the oligonucleotides in accordance with the invention.
- oligonucleotides are synthesized using the phosphoramidite method (BEAUCAGE, 1985, cited) with a 380 D DNA synthesizer (APPLIED BIOSYSTEMS, CA).
- Example 6 Detection of amplified sequences of the MAIP group by the restriction test of an oligonucleotide.
- the 10X buffer contains 500 mM Tris-HCl pH 8.0, 100 mM MgCl 2 and 400 mM NaCl;
- the positive samples are identified by the presence of a band corresponding to a fragment of 9 nucleotides resulting from the cleavage of the oligonucleotide TB-5 by the restriction enzyme Bgl1.
- Figure 5 shows the detection of mycobacterial DNA sequences amplified by the oligonucleotide restriction test.
- the purified mycobacterial DNA is amplified and equivalent amounts of the product amplified from M. avium (column 1-5), M. bovis BCG (column 6) and M. fortuitum (column 7) are evaluated as described above. using the 32 P-labeled oligonucleotide TB-5 and the restriction enzyme Bgl1.
- An amount of enzyme corresponding to an enzymatic activity is added: of 1 unit (samples 1, 6 and 7); 5 units (sample 2); 10 units (sample 3); 20 units (sample 4); 50 units (sample 5).
- FIG. 5 clearly shows that only columns 1-5 make it possible to highlight the cleaved oligomer, thus making it possible to identify M. avium.
- Example 7 Detection of mycobacterial DNA in a sputum.
- DNA purified from M. tuberculosis ( Figure 6, T), M. avium ( Figure 6, A), M. fortuitum (Figure 6, F) and DNA extracted from sputum samples which provided a negative culture ( Figure 6, column 1-6) or sputum samples which provided a positive culture for M. tuberculosis ( Figure 6, columns 7 and 8), was amplified using the Taq polymerase in the case of PCR or another polymerase and the oligonucleotides TB-1 and TB-2. Samples of the amplified sequences are fixed on filters (dot blots) and hybridized with the oligonucleotides TB-4, TB-5 and TB-6 labeled at their 5 'end with 32 P.
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Abstract
Description
Claims
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Application Number | Priority Date | Filing Date | Title |
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FR8905057 | 1989-04-17 | ||
FR8905057A FR2645878B1 (fr) | 1989-04-17 | 1989-04-17 | Sequences nucleotidiques d'actinomycetales, applications a la synthese ou a la detection d'acides nucleiques, produits d'expression de ces sequences et application en tant que compositions immunogenes |
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EP90907137A Withdrawn EP0419648A1 (fr) | 1989-04-17 | 1990-04-13 | Sequences nucleotidiques d'actinomycetales, applications a la synthese ou a la detection d'acides nucleiques, produits d'expression de ces sequences et application en tant que compositions immunogenes |
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US (2) | US5817459A (fr) |
EP (1) | EP0419648A1 (fr) |
JP (1) | JPH03505974A (fr) |
CA (1) | CA2031195A1 (fr) |
FR (1) | FR2645878B1 (fr) |
WO (1) | WO1990012875A1 (fr) |
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EP0499003A1 (fr) * | 1991-02-14 | 1992-08-19 | N.V. Innogenetics S.A. | Polypeptides et peptides, en particulier polypeptides et peptides recombinants, acides nucléiques les encodantes, et leur utilisation pour le diagnostic de la tuberculose |
EP0521220A1 (fr) * | 1991-06-14 | 1993-01-07 | Institut Pasteur | Actinomycétale immunogène recombinant |
FR2683227B1 (fr) * | 1991-10-31 | 1994-03-04 | Pasteur Institut | Sequences nucleotidiques hybridant avec les souches bacteriennes du complexe mycobacterium avium-intracellulare, leur utilisation comme amorces oligonucleotidiques et sondes nucleiques. |
FR2694754B1 (fr) * | 1992-08-12 | 1994-09-16 | Bio Merieux | Fragments d'ADN de mycobactéries, amorces d'amplification, sondes d'hybridation, réactifs et procédé de détection de détection de mycobactéries. |
SG63589A1 (en) * | 1993-05-14 | 1999-03-30 | Johnson & Johnson Clin Diag | Diagnostic compositions elements methods and test kits for amplification and detection of two or more dna's using primers having matched melting temperatures |
US5925518A (en) * | 1995-05-19 | 1999-07-20 | Akzo Nobel N.V. | Nucleic acid primers for amplification of a mycobacteria RNA template |
US6538177B1 (en) | 1998-07-15 | 2003-03-25 | Pioneer Hi-Bred International, Inc. | Compositions and methods for fumonisin detoxification |
US6388171B1 (en) * | 1999-07-12 | 2002-05-14 | Pioneer Hi-Bred International, Inc. | Compositions and methods for fumonisin detoxification |
GB0007150D0 (en) * | 2000-03-24 | 2000-05-17 | Lamellar Therapeutics Limited | Immunotherapeutic methods and compositions |
AU2002952548A0 (en) * | 2002-11-08 | 2002-11-21 | Cellestis Limited | Diagnostic assay |
GB0322448D0 (en) * | 2003-09-25 | 2003-10-29 | Lamellar Therapeutics Ltd | Using lamellar bodies to modify linear biological macro molecules |
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US4358535A (en) * | 1980-12-08 | 1982-11-09 | Board Of Regents Of The University Of Washington | Specific DNA probes in diagnostic microbiology |
DK171161B1 (da) * | 1985-03-28 | 1996-07-08 | Hoffmann La Roche | Fremgangsmåde til påvisning af forekomst eller fravær af mindst én specifik nukleinsyresekvens i en prøve eller til skelnen mellem to forskellige nukleinsyresekvenser i denne prøve |
US4906742A (en) * | 1986-07-31 | 1990-03-06 | Whitehead Institute For Biomedical Research | Encoding antigens of M. Leprae |
AU1548388A (en) * | 1987-02-02 | 1988-08-24 | Whitehead Institute For Biomedical Research | Mycobacterium tuberculosis genes and encoding protein antigens |
US4952395A (en) * | 1987-02-26 | 1990-08-28 | Scripps Clinic And Research Foundation | Mycobacterial recombinants and peptides |
GB8709803D0 (en) * | 1987-04-24 | 1987-05-28 | Mcfadden J J | Treatment of crohn's disease &c |
-
1989
- 1989-04-17 FR FR8905057A patent/FR2645878B1/fr not_active Expired - Fee Related
-
1990
- 1990-04-13 US US07/623,729 patent/US5817459A/en not_active Expired - Fee Related
- 1990-04-13 EP EP90907137A patent/EP0419648A1/fr not_active Withdrawn
- 1990-04-13 CA CA002031195A patent/CA2031195A1/fr not_active Abandoned
- 1990-04-13 WO PCT/FR1990/000274 patent/WO1990012875A1/fr not_active Application Discontinuation
- 1990-04-13 JP JP2506961A patent/JPH03505974A/ja active Pending
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1995
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FR2645878B1 (fr) | 1994-02-25 |
JPH03505974A (ja) | 1991-12-26 |
US5817459A (en) | 1998-10-06 |
WO1990012875A1 (fr) | 1990-11-01 |
FR2645878A1 (fr) | 1990-10-19 |
CA2031195A1 (fr) | 1990-10-18 |
US5877273A (en) | 1999-03-02 |
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