WO1997030178A2 - Diagnostic des maladies a repetition trinucleotidique et genes impliques dans ces maladies - Google Patents
Diagnostic des maladies a repetition trinucleotidique et genes impliques dans ces maladies Download PDFInfo
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- WO1997030178A2 WO1997030178A2 PCT/FR1997/000297 FR9700297W WO9730178A2 WO 1997030178 A2 WO1997030178 A2 WO 1997030178A2 FR 9700297 W FR9700297 W FR 9700297W WO 9730178 A2 WO9730178 A2 WO 9730178A2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6883—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
- A61P25/16—Anti-Parkinson drugs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P27/00—Drugs for disorders of the senses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P27/00—Drugs for disorders of the senses
- A61P27/02—Ophthalmic agents
- A61P27/06—Antiglaucoma agents or miotics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P27/00—Drugs for disorders of the senses
- A61P27/02—Ophthalmic agents
- A61P27/12—Ophthalmic agents for cataracts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/06—Antianaemics
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/156—Polymorphic or mutational markers
Definitions
- the present invention relates to the detection of human genes comprising repetitive triplet sequences CAG or CTG, as well as the use of these genes in the diagnosis and the possible treatment of certain hereditary neurological diseases.
- CAG or CTG repeat triplet sequences constitutes a mutation involved in at least 6 human inherited neurological diseases (called “repeat triplet diseases”), in particular spinobulbar muscle atrophy (SBMA), myotonic dystrophy (MD), cerebro-spinal ataxia (SCAS) 1 and 3, den-ato-rubro-pallydoluysiane atrophy (DRPLA) and Huntington's disease (HD) (1).
- SBMA spinobulbar muscle atrophy
- MD myotonic dystrophy
- SCAS cerebro-spinal ataxia
- DRPLA den-ato-rubro-pallydoluysiane atrophy
- HD Huntington's disease
- CAG / CTG also called dynamic mutation
- CAG / CTG repeats can occur in the non-coding (MD) or coding (eg SBMA and HD) regions of the transcripts. These transcripts are sometimes expressed in tissues other than the brain and when translated result in larger gene products carrying an abnormally elongated polyglutamine domain (2 to 4).
- the foregoing demonstrates the considerable importance of repeated triplet diseases and the importance of their diagnosis and treatment.
- the present invention is based on a systematic study of CAG / CTG repeats (which will be designated hereinafter by "[CAG] n", n being the number of repeats of the triplet), this study having been carried out with human cDNA libraries , these having undergone a first general screening, then the selected sequences having been selected on the basis of a certain number of criteria making it possible to ensure that the sequences in question belonged to new human genes and could, with great probability, to be implicated in diseases with repeated triplet. Finally, the selected sequences were the subject of a more complete study intended to allow their localization.
- two sets of cDNAs from human brains were studied to analyze the presence of CAG repeats using hybridization of oligonucleotides on high density membranes.
- the two libraries were obtained from mRNAs using the oligo-dT primer, one of the libraries being made up of fetal brain (FB) cDNA clones and the other library being made up of clones of Normalized newborn brain cDNA (NIB).
- FB fetal brain
- NBI Normalized newborn brain cDNA
- human ESTs in databases have been analyzed for the presence of repeated triplets in cDNAs from human tissues other than the brain.
- the present invention is based on the demonstration of certain sequences capable of being implicated in repeated triplet diseases obtained under hybridization conditions making it possible to select cDNAs which contain a number of sequences [CAG] greater than 9, which are more likely to be polymorphic in a normal population. 0
- the present invention relates to a transcribed DNA sequence rich in repeated triplet CAG or CTG corresponding to sequences A to I of the table, as well as their normal and mutated alleles and the complementary sequences.
- normal alleles is meant the alleles as they have been isolated or as they can be isolated from samples from normal individuals, the “mutated alleles” being the alleles of the genes carrying your sequences [CAG] n abnormally repeated.
- sequences in question are for the first time identified as being part of a gene which may present a dynamic mutation, said genes not having , moreover, in themselves never been described.
- sequences are identified in the table and can, if necessary, be re-isolated using the following primers: SEQ. ID 1 to 18, primers 1 to 1 8 corresponding, in pairs, to the sequences A to 1 mentioned above.
- sequences thus highlighted can, first of all, be used within the framework of the diagnosis, and more exactly of a prognosis. Indeed, like a large number of diseases having a genetic support, the demonstration of the presence of a sequence presenting an abnormal number of repetitions of triplet [CAGjn cannot in itself ensure the occurrence of the disease, but must be interpreted according to a set of other information to allow either a very early diagnosis or possibly specific surveillance, especially in families at risk.
- This diagnosis can be made by comparing the DNA sequence according to the patient's invention with a normal sequence to detect the presence of additional nucleotide repeats.
- the present invention relates to a method for demonstrating the risks of the appearance of a trinucleotide recurrent disease in a patient, characterized in that the DNA sequence according to claim 1 of said patient is compared to a normal sequence to detect the presence of additional trinucleotide repeats.
- a method for demonstrating the risks of the appearance of a trinucleotide recurrent disease in a patient characterized in that the DNA sequence according to claim 1 of said patient is compared to a normal sequence to detect the presence of additional trinucleotide repeats.
- the most effective methods consist in carrying out an amplification operation, before highlighting the differences, by any suitable method, in particular the so-called "PCR" method, even if other methods can be used.
- primers which can be used in the context of the methods according to the invention, mention should be made of the primers of SEQ . ID 1 to 1 S which constitute two by two of the pairs of primers for each of the sequences object of the invention.
- the sequences according to the present invention are amplified and it is then possible, by comparison with a normal and / or standard sample, to demonstrate the presence of the supernumerary triplets and therefore the possibility of occurrence of a disease linked to this type of dynamic mutation. It is also interesting to note that these dynamically mutated diseases are known to be all the more severe and to occur the sooner the greater the number of repetitions.
- the diagnostic method can allow not only a good prognosis for the onset of the disease, but also to assess the time when this disease will occur and / or its possible severity.
- the present invention also relates to genes and their alleles which carry, at least in part, these sequences, said genes being, of course, directly involved in the onset of the disease.
- the corresponding genes can be expressed in cells by known means in order to produce the corresponding proteins.
- these proteins being involved in the disease, it is desired to reduce their quantity, either by blocking their expression by appropriate methods at the level of genes or regulatory elements, or by fixing or inactivating them, for example using receptor proteins acting as decoys. Again, these receptor or inactivated proteins can be generated in situ by expression of the corresponding DNA sequences.
- proteins with abnormally large polyglutamic domains us av have abnormal aggregation properties, both with each other and with other proteins (7, 8)
- the aggregates thus created are probably involved in the genesis of triplet repeat diseases, this is why it is also possible to provide a therapy in which the therapeutic agents would prevent aggregation, either by blocking the molecule as described above, or by attaching to the molecule to prevent approximation with other proteins.
- sequences according to the present invention can be obtained thanks to the information appearing in the table and to the references which are given therein and by using the primer sequences which are described in the attached sequence identifiers.
- the two libraries used are: a first library (5) containing 60,000 non-standard cDNAs of human fetal brain (FB clones) (Laboratory of Dr. Hans Lehrach, Max Plank Institute for Molecular Genetics, Berlin, Germany) subclones in the vector p-SPORT- 1 (Life Technologies, Inc., Gaithesburg,
- the second library contains 40,128 normalized cDNAs for newborn brains (NIB clones) subcloned into a laf id (6) vector and which is part of the resources of the I MAGE consortium (Lawrence Livermore Lab ., Livermore, CA,) and the EST Merck WU program
- clone 2.1 16 which is located on chromosome 3pl4 and possibly involved in ADCA II, the other highly polymorphic sequences [CAGjn previously described do not correspond to any known locus for hereditary neurological diseases.
- This clone 2.1 16 was found to correspond to a transcript of 2227 base pairs highly expressed in skeletal muscles and weakly expressed in the brain according to the Northern Blot analysis. The repetition of the polymorphic CAG sequences is localized at the level of the 3 'untranslated region of the mRNA.
- the RNA corresponding to clone 2.1 16 codes for a putative protein of 137 amino acids (nt 127 to 538) having no homology with proteins known in Genbank.
- the complete sequence of the transcript of clone 2. 1 16 is represented by SEQ D 19.
- IS sequence homologies with the IS in Genbank: nu mero access ESTs in Genbank
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9529061A JP2000505293A (ja) | 1996-02-15 | 1997-02-17 | トリヌクレオチド反復病の診断とこの病気に関係する遺伝子 |
EP97905219A EP0894144A2 (fr) | 1996-02-15 | 1997-02-17 | Diagnostic des maladies a repetition trinucleotidique et genes impliques dans ces maladies |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9601864A FR2745007B1 (fr) | 1996-02-15 | 1996-02-15 | Diagnostic des maladies a repetition trinucleotidique et genes impliques dans ces maladies |
FR96/01864 | 1996-02-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1997030178A2 true WO1997030178A2 (fr) | 1997-08-21 |
WO1997030178A3 WO1997030178A3 (fr) | 1997-10-16 |
Family
ID=9489220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1997/000297 WO1997030178A2 (fr) | 1996-02-15 | 1997-02-17 | Diagnostic des maladies a repetition trinucleotidique et genes impliques dans ces maladies |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0894144A2 (fr) |
JP (1) | JP2000505293A (fr) |
CA (1) | CA2246362A1 (fr) |
FR (1) | FR2745007B1 (fr) |
WO (1) | WO1997030178A2 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998056950A1 (fr) * | 1997-06-11 | 1998-12-17 | Fondation Jean Dausset-Ceph | Sequences d'adn riches en triplet repete utiles dans le diagnostic de maladies a repetition trinucleotidique |
WO2003014396A1 (fr) * | 2001-08-06 | 2003-02-20 | Biomedlab Corporation | Procede de diagnostic destine a une maladie de multiplication de sequence repetee de trinucleotides, et kit de diagnostic |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9202485D0 (en) * | 1992-02-06 | 1992-03-25 | Univ Wales Medicine | Dna sequences and materials and methods for the diagnosis of myotonic dystrophy |
DE69313829D1 (de) * | 1992-02-18 | 1997-10-16 | Univ Ottawa | Myotonische Distrophie |
US5834183A (en) * | 1993-06-29 | 1998-11-10 | Regents Of The University Of Minnesota | Gene sequence for spinocerebellar ataxia type 1 and method for diagnosis |
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1996
- 1996-02-15 FR FR9601864A patent/FR2745007B1/fr not_active Expired - Fee Related
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1997
- 1997-02-17 WO PCT/FR1997/000297 patent/WO1997030178A2/fr not_active Application Discontinuation
- 1997-02-17 JP JP9529061A patent/JP2000505293A/ja active Pending
- 1997-02-17 EP EP97905219A patent/EP0894144A2/fr not_active Withdrawn
- 1997-02-17 CA CA002246362A patent/CA2246362A1/fr not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998056950A1 (fr) * | 1997-06-11 | 1998-12-17 | Fondation Jean Dausset-Ceph | Sequences d'adn riches en triplet repete utiles dans le diagnostic de maladies a repetition trinucleotidique |
WO2003014396A1 (fr) * | 2001-08-06 | 2003-02-20 | Biomedlab Corporation | Procede de diagnostic destine a une maladie de multiplication de sequence repetee de trinucleotides, et kit de diagnostic |
Also Published As
Publication number | Publication date |
---|---|
FR2745007A1 (fr) | 1997-08-22 |
JP2000505293A (ja) | 2000-05-09 |
WO1997030178A3 (fr) | 1997-10-16 |
FR2745007B1 (fr) | 1998-05-07 |
CA2246362A1 (fr) | 1997-08-21 |
EP0894144A2 (fr) | 1999-02-03 |
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