WO2000008143A2 - Gen isoliert auf dem kurzen arm des menschlichen chromosoms 17 - Google Patents
Gen isoliert auf dem kurzen arm des menschlichen chromosoms 17 Download PDFInfo
- Publication number
- WO2000008143A2 WO2000008143A2 PCT/DE1999/002479 DE9902479W WO0008143A2 WO 2000008143 A2 WO2000008143 A2 WO 2000008143A2 DE 9902479 W DE9902479 W DE 9902479W WO 0008143 A2 WO0008143 A2 WO 0008143A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nucleic acid
- protein
- expression
- antibody
- dna molecules
- 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.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
-
- 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
-
- 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
- A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2799/00—Uses of viruses
- C12N2799/02—Uses of viruses as vector
- C12N2799/021—Uses of viruses as vector for the expression of a heterologous nucleic acid
- C12N2799/027—Uses of viruses as vector for the expression of a heterologous nucleic acid where the vector is derived from a retrovirus
Definitions
- the present invention relates to DNA molecules containing the information for a human gene isolated on the short arm of chromosome 17.
- the present invention further provides those containing DNA molecules
- Vectors ready wherein in a preferred embodiment these vectors are suitable for expressing the DNA molecules according to the invention in prokaryotes or eukaryotes.
- the present invention relates to medicaments and diagnostic compositions which contain the above DNA molecules or vectors, the protein encoded thereby or an antibody which specifically recognizes this protein.
- SMS Smith-Magenis syndrome
- the invention is therefore essentially based on the technical problem of creating the molecular basis for elucidating neurodegenerative diseases which produce symptoms which are similar or the same as in Smith's gastric syndrome and for providing suitable diagnostics and / or therapy therefor.
- This technical problem has been solved by providing the embodiments characterized in the patent claims.
- a DNA molecule related to SMS could be isolated and identified.
- HSGT1 a gene that is associated with partial or complete deletion with SMS is of interest, since this helps to clarify the molecular pathogenesis of SMS and thus improved therapies.
- the cloning of the SMS gene forms the basis for the development of diagnostic tests in order to ensure a more reliable and early diagnosis of those affected in the future.
- functional analyzes of the protein will undoubtedly contribute to an understanding of neuron development, since the gene is located in a region in the genome (human chromosome 17p11.2; see FIG. 4) that is associated with various neurological diseases. It is therefore considered a candidate gene for studies of the
- HSGT1 DNA molecule
- nucleic acid of FIG. 1 (a) the nucleic acid of FIG. 1, or a DNA or a fragment thereof which differs from it by one or more base pairs, (b) a DNA which hybridizes with the nucleic acid of (a), or
- nucleic acid molecules defined under (a) and (c) code for proteins, polypeptides or peptides which still have at least one of the biological activities described below of the protein encoded by the nucleic acid according to FIG. 1, for example as a differentiation factor in neuronal Development and / or intermediary filament in neurons, or whose change or failure leads or can lead to SMS.
- the DNA molecules defined under (a) also include DNA molecules which differ from the sequence given in FIG. 1 by deletion (s), insertion (s),
- hybridizing DNA refers to a DNA that hybridizes with a DNA of (a) under customary conditions, in particular at 20 ° C. below the melting point of the DNA.
- hybridize refers to conventional hybridization conditions, preferably to hybridization conditions in which 5xSSPE, 1% SDS, IxDenhardts solution is used and the hybridization temperatures between 35 ° C and 70 ° C, preferably at 65 ° C lie.
- the DNA molecule according to the invention is a cDNA.
- the DNA molecule according to the invention is a genomic DNA which is preferably derived from a mammal, for example a human. Screening methods based on nucleic acid hybridization permit the isolation of the genomic DNA molecules according to the invention from any organism or derived genomic DNA banks, wherein probes are used which contain the nucleic acid sequence shown in FIG. 1 or a part thereof.
- the genomic DNA for example from a human, can be used to identify further mutations which are involved in the development of neurodegnerative diseases, in particular SMS, for example mutations which lead to amino acid exchanges, inhibition of splicing or faulty splicing.
- nucleic acids according to the invention can also be inserted into a vector or expression vector.
- the present invention also encompasses vectors containing these nucleic acid molecules. Examples of this are the
- E. coli E.g. E. coli
- these are e.g. pGEMEX, pUC derivatives (e.g. pUC8), pBR322, pBlueScript, pGEX-2T, pET3b and pQE-8.
- yeast e.g. to call pY100 and Ycpadl
- animal cells e.g. pKCR, pEFBOS, cDM8 and pCEV4 must be specified.
- the nucleic acid molecule according to the invention is in the vector with regulatory Functionally linked elements that allow its expression in prokaryotic or eukaryotic host cells.
- regulatory elements for example a promoter
- such vectors typically contain an origin of replication and specific genes which allow the phenotypic selection of a transformed host cell.
- Expression in prokaryotes include the lac, trp promoter or T7 promoter, and for expression in eukaryotes the AOX1 or GAL1 promoter in yeast, and the CMV, SV40, RVS-40 Promoter, CMV or SV40 enhancer for expression in animal cells.
- suitable promoters are the metallothionein I and the polyhedrin promoter.
- Suitable vectors include in particular T7-based expression vectors for expression in bacteria (Rosenberg et al., Gene 56 (1987), 125) or pMSXND for expression in mammalian cells (Lee and Nathans, J.Biol.Chem. 263 (1988) , 3521).
- the vector containing the DNA molecules according to the invention is a virus, for example an adenovirus, vaccinia virus or an AAV virus, which is useful in gene therapy.
- Retroviruses are particularly preferred. Examples of suitable retroviruses are MoMuLV, HaMuSV, MuMTV,
- the DNA molecules according to the invention can also be transported to the target cells in the form of colloidal dispersions. These include, for example, lipososms or lipoplexes (Mannino et al., Biotechniques 6 (1988), 682).
- the present invention also relates to host cells containing the vectors described above. These host cells include bacteria, yeast, insect and animal cells, preferably mammalian cells.
- coli strains HB101, DH1, x1776, JM101, JM109, BL21, XLIBIue and SG 13009, the yeast strain Saccharomyces cerevisiae and the animal cells L, 3T3, FM3A, CHO, COS, Vero, HeLa and the insect cells sf9 are preferred. Methods for transforming these host cells, for phenotypically selecting transformants and for expressing the DNA molecules of the invention using the vectors described above are known in the art.
- the present invention also relates to a method for producing a protein which is encoded by the above nucleic acid, comprising the cultivation of the host cells described above under conditions which allow the expression of the
- Suitable methods for the recombinant production of the protein are generally known (see for example Holmgren, Annu.Rev.Biochem. 54 (1985), 237; LaVallie et al., Bio / Technology 11 (1993), 187; Wong, Curr.Opin.Biotec - h.6 (1995), 517; Romanos, Curr.Opin.Biotech. 6 (1995), 527; Williams et al., Curr.
- Suitable purification methods for example preparative chromatography, affinity chromatography, for example immunoaffinity chromatography, HPLC etc. are also generally known.
- the present invention relates to a DNA molecule (HSGT1) encoded according to the invention or according to the protein obtained in the current process.
- HSGT1 DNA molecule
- the amino acid sequence of such a protein is shown in Fig. 2.
- the protein according to the invention can be modified according to customary methods known in the art. These modifications include exchanges, insertions, or deletions of amino acids that modify the structure of the protein while essentially maintaining its biological activity.
- the exchanges preferably include "conservative" exchanges of amino acid residues, ie exchanges for biologically similar residues, for example the substitution of a hydrophobic residue (for example isoleucine, valine, leucine, methionine) for another hydrophobic residue, or the substitution of one polar residue for another polar residue (eg arginine against lysine, glutamic acid against aspartic acid etc.).
- Deletions can lead to the generation of molecules which are significantly smaller in size, ie which lack amino acids at the N or C terminus, for example.
- the present invention also relates to antibodies which specifically recognize the protein HSGT1 described above.
- the antibodies can be monocional, polyclonal or synthetic antibodies or fragments thereof, for example Fab, Fv or scFv fragments. These are preferably monocional antibodies.
- For the production it is favorable to immunize animals, in particular rabbits or chickens for a polyclonal and mice for a monoclonal antibody, with an above (fusion) protein or fragments thereof. Further "boosters" of the animals can be carried out with the same (fusion) protein or fragments thereof.
- the polyclonal antibody can then be obtained from the serum or egg yolk of the animals.
- the antibodies according to the invention can be produced according to standard methods, the protein encoded by the DNA molecules according to the invention or a synthetic fragment thereof serving as an immunogen.
- Monocional antibodies can be produced, for example, by the method described by Köhler and Milstein (Nature 256 (1975), 495) and Galfre (Meth. Enzymol. 73 (1981), 3). where mouse myeloma cells are fused with spleen cells derived from immunized mammals. These antibodies can be used, for example, for immunoprecipitation of the proteins discussed above or for the isolation of related proteins from cDNA expression banks.
- the antibodies can be bound, for example, in liquid phase immunoassays or to a solid support.
- the antibodies can be labeled in different ways. Suitable markers and labeling methods are known in the art. Examples of immunoassays are ELISA and RIA.
- the present invention further relates to the use of the DNA molecules, vectors, proteins and / or antibodies described above. These are preferably used for the production of a medicament for the prevention or treatment of neurodegenerative diseases, in particular SMS.
- the drug can be used in gene therapy, the methods or vectors described above for introducing the inventive
- DNA molecules can be used.
- the protein encoded by the DNA molecules according to the invention can be administered directly so as to provide sufficient amounts of the biologically active protein in cells which no longer have functional copies of the gene according to the invention.
- the medicament according to the invention is preferably used when biologically active protein is not formed or is formed in too small amounts in the patient concerned. There are indications that this gene plays a role in the development of autism.
- Suitable carriers and the formulation of such medicaments are known to the person skilled in the art. Suitable carriers include, for example, phosphate-buffered saline solutions, water, emulsions, for example oil / water emulsions, wetting agents, sterile solutions, etc.
- the medicaments can be administered orally or parenterally. Methods for parenteral administration include topical, intra-arterial, intramuscular, subcutaneous, intramedullary, intrathecal, intraventricular, intravenous, intraperitoneal or intranasal administration. The appropriate dosage is determined by the attending physician and depends on various factors, for example the age, gender, weight of the patient, the stage of the disease, the type of administration etc.
- the present invention further relates to a diagnostic composition which contains the above-described DNA molecule or the antibody or combinations thereof, optionally together with a suitable detection means.
- the DNA molecule according to the invention can also be used as a probe to isolate DNA molecules which originate, for example, from another species or another organism and encode a protein with the same biological activity.
- the probe preferably has a length of at least 10, particularly preferably at least 15 bases.
- Suitable detection methods based on hybridization are known to the person skilled in the art.
- Suitable labels for the probe are also known to the person skilled in the art and include, for example, labeling with radioisotopes, bioluminescent, chemiluminescent, fluorescent labels, metal chelates, enzymes, etc.
- Mutations that are related to neurodegenerative diseases with the sequence of a patient with SMS or related symptoms healthy patients is compared.
- the present invention relates to a method for diagnosing neurodegenerative diseases, in particular SMS, in vitro, comprising the following steps:
- HSGT1 gene wherein length differences or mutations which lead to substitutions, deletions or additions of amino acids or to premature termination of translation are indicative of neurodegenerative diseases, in particular SMS.
- diagnosis can also be made by isolating lymphoblasts and producing metaphase preparations which are subjected to a FISH analysis in order to determine whether certain areas of the genome are present at all.
- Labeling of the probe and detection of the hybridization for example via "Southem blot"; be applied.
- the above detection can also be carried out using PCR or LCR.
- Primers are used which flank the sequence according to the invention or suitable subregions. Diagnostically important are amplification products of DNA from the tissue in question, which differ, for example in terms of their length and / or sequence, from the amplification products of DNA from healthy tissue.
- Comparison of the concentration and / or length of HSGT1 mRNA of the patient sample with an mRNA of a healthy person, with length differences or the absence or a lower concentration of the HSGT1 mRNA (for example due to mutations in regulatory sequences which are related to transcription) in comparison to the control mRNA is indicative of a neurogenerative disease, in particular for SMS.
- RNA or poly (A) + RNA from biological samples
- separation of the RNAs on size-separating gels for example denaturing agarose gels
- production and labeling of the probe and the detection be applied via "Northern blot”.
- a possible disease can also be diagnosed by a method which comprises the following steps:
- This detection can also be performed using standard techniques known to those skilled in the art. These are also known cell disruption methods which allow the isolation of the protein in such a way that it can be brought into contact with the antibody.
- the detection of the bound antibody is preferably carried out via immunoassays, for example Western blot, ELISA or RIA.
- the diagnostic methods according to the invention can also be carried out as prenatal diagnostic methods according to techniques known to the person skilled in the art.
- kits for carrying out the diagnostic methods according to the invention which contain the antibody according to the invention or a fragment thereof, a DNA molecule according to the invention as a probe or for
- PCR or LCR suitable primer pair based on the sequence of the DNA molecule according to the invention, optionally in combination with a suitable detection means.
- the DNA molecules, antibodies or fragments thereof contained in the kit can be immobilized on a suitable carrier.
- Fig. 1 Nucleic acid sequence of the cDNA of the HSGT1 gene
- CAG trinucleotide repeat is shown in bold.
- the primer bin Parts of the PCR amplification that amplify a polymorphism are underlined.
- Fig. 2 Amino acid sequence derived from Fig. 1
- Figure 3 Northern blot analysis using RNAs from different tissues.
- An RT-PCR product from fetal brain RNA from the 5 'end including the polymorphic repeats was used as the hybridization sample.
- Fig. 4 Genome map with the exact location of the HSGT1 gene
- Northern blots with RNAs from various tissues were overnight at 42 ° C in a hybridization buffer with 2xSSC, Denhardt's solution, formamide and herring sperm DNA and the specific probe (RT-PCR product from fetal brain RNA from the 5'- Hybridized at the end including the polymorphic repeat).
- Filters were washed two to three times at 65 ° C in 2xSSC / 0.1% SDS and exposed to a Kodak film or Fuji film at -70 ° C for 24 to 48 hours.
- HSGT1 The result of the Northern blot is shown in Fig. 3. It can be seen that the HSGT1 gene has an 8 kB transcript and is ubiquitously weakly expressed.
- the DNA from FIG. 1 is provided with Barn HI linkers, cut with Barn HI and cut into Barn Hl cleaved expression vector pQE-8 (Diagen) inserted.
- the expression plasmid pQ / HSGT1 is obtained.
- pQ / HSGT1 is used to transform E.coli SG 13009 (see. Gottesmann, S. et al., J. Bacteriol. 148, (1981), 265-273).
- the bacteria are cultivated in an LB medium with 10 ⁇ g / ml ampicillin and 25 ⁇ g / ml kanamycin and induced for 4 h with 60 ⁇ M isopropyl- ⁇ -D-thiogalactopyranoside (IPTG).
- IPTG isopropyl- ⁇ -D-thiogalactopyranoside
- the bacteria are lysed, and then the lysate is used for chromatography (Ni-NTA resin) in the presence of 8 M urea in accordance with the instructions of the
- the bound fusion protein is eluted in a pH 3.5 buffer. After neutralization, the fusion protein is subjected to an 18% SDS-polyacrylamide gel electrophoresis and stained with Coomassie blue (cf. Thomas, J.O. and Kornberg, R.D., J. Mol.Biol. 149 (1975), 709-733).
- a fusion protein according to the invention from Example 3 is subjected to an 18% SDS polyacrylamide gel electrophoresis. After staining the gel with 4 M sodium acetate, an approximately 200 kD band is cut out of the gel and in
- 35 ⁇ g of gel-purified fusion protein in 0.7 ml of PBS and 0.7 ml of complete or incomplete Freund's adjuvant are used per immunization.
- the rabbit's serum is tested in an immunoblot.
- a fusion protein according to the invention from Example 3 is subjected to SDS-polyacrylamide gel electrophoresis and transferred to a nitrocellulose filter (cf. Khyse-Andersen), J., J. Biochem.Biophys. Meth. 10, (1984), 203-209).
- the nitrocellulose filter is incubated with a first antibody at 37 ° C. for 1 h.
- This antibody is rabbit serum (1: 10000 in PBS).
- the nitrocellulose filter is incubated with a second antibody.
- This antibody is a monoclonal goat anti-rabbit IgG antibody (Dianova) (1: 5000) coupled with alkaline phosphatase in PBS.
- Antibodies are extracted from egg yolk and tested in a Western blot. Polyclonal antibodies according to the invention are detected.
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Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU64629/99A AU6462999A (en) | 1998-08-07 | 1999-08-06 | Gene isolated on the short arm of human chromosome 17 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19835910A DE19835910C1 (de) | 1998-08-07 | 1998-08-07 | Gen isoliert auf dem kurzen Arm des menschlichen Chromosoms 17 |
| DE19835910.1 | 1998-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000008143A2 true WO2000008143A2 (de) | 2000-02-17 |
| WO2000008143A3 WO2000008143A3 (de) | 2000-06-15 |
Family
ID=7876883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1999/002479 Ceased WO2000008143A2 (de) | 1998-08-07 | 1999-08-06 | Gen isoliert auf dem kurzen arm des menschlichen chromosoms 17 |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU6462999A (de) |
| DE (1) | DE19835910C1 (de) |
| WO (1) | WO2000008143A2 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7033790B2 (en) | 2001-04-03 | 2006-04-25 | Curagen Corporation | Proteins and nucleic acids encoding same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2216057A1 (en) * | 1997-09-19 | 1999-03-19 | Ridha Joober | Polymorphic cag repeat-containing gene, diagnosis of psychiatric diseases and therapeutic uses thereof |
-
1998
- 1998-08-07 DE DE19835910A patent/DE19835910C1/de not_active Expired - Fee Related
-
1999
- 1999-08-06 WO PCT/DE1999/002479 patent/WO2000008143A2/de not_active Ceased
- 1999-08-06 AU AU64629/99A patent/AU6462999A/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7033790B2 (en) | 2001-04-03 | 2006-04-25 | Curagen Corporation | Proteins and nucleic acids encoding same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19835910C1 (de) | 2000-05-04 |
| AU6462999A (en) | 2000-02-28 |
| WO2000008143A3 (de) | 2000-06-15 |
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