WO1996017058A1 - Recepteur de lipoproteine basse densite denature - Google Patents
Recepteur de lipoproteine basse densite denature Download PDFInfo
- Publication number
- WO1996017058A1 WO1996017058A1 PCT/JP1995/002444 JP9502444W WO9617058A1 WO 1996017058 A1 WO1996017058 A1 WO 1996017058A1 JP 9502444 W JP9502444 W JP 9502444W WO 9617058 A1 WO9617058 A1 WO 9617058A1
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- WIPO (PCT)
- Prior art keywords
- seq
- receptor
- density lipoprotein
- density
- dna sequence
- Prior art date
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Classifications
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- 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
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention relates to receptors for mammalian riboproteins, and more particularly to modified low-density riboprotein receptors for mammalian vascular endothelial cells.
- vascular endothelial cells are important in the early stages of the progression of arteriosclerosis. Endothelial cells release various humoral factors and maintain circulatory homeostasis. The function of vascular endothelial cells is impaired by physical stimuli and various substances, and among them, it is considered that the ability of acid lignin, a type of denatured low-density riboprotein, is most important. For example, regulation of vascular tonus requires release of nitric oxide, a vascular endothelial cell vasorelaxant. Impaired by lipoproteins.
- denatured low-density riboprotein is taken up by macrophages and vascular endothelial cells via a receptor different from the low-density riboprotein receptor.
- Structural strength has already been determined for the macula phage (described in Japanese Unexamined Patent Publications Nos. 6-500765, 6-500844, and JP-A-3-290184).
- Denatured low-density lipoprotein is taken up through scavenger receptors, and macrophages are transformed into characteristic foam cells in atherosclerotic foci.
- the modified low-density riboprotein receptor of vascular endothelial cells has the amino acid sequence of SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3.
- the present invention provides a DNA sequence consisting essentially of a region encoding a modified low-density lipoprotein receptor of mammalian vascular endothelial cells.
- the DNA sequence may be a cDNA clone derived from the open reading frame of a modified low density lipoprotein receptor gene of a natural mammalian vascular endothelial cell.
- the DNA sequence may be a DNA sequence that can hybridize with the above cDNA clone and encodes a modified low-density lipoprotein receptor of a mammalian vascular endothelial cell having biological activity.
- the DNA sequence as described above may be a DNA sequence encoding the same modified low-density lipoprotein receptor as a result of the degeneracy of the genetic code.
- the present invention relates to the DNA sequence of the region encoding the modified low-density lipoprotein receptor of mammalian vascular endothelial cells, which is shown in SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 3 (DNA having the nucleotide sequence ), Or its analog.
- the present invention also relates to a cDNA clone having a DNA sequence shown in SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 3 of a region encoding a modified low-density lipoprotein receptor of mammalian vascular endothelial cells, or an analog thereof.
- the present invention also relates to a mammalian vascular endothelial cell capable of hybridizing with a cDNA clone having a DNA sequence represented by SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3 in a 42, 20% (v / v) formamide aqueous solution.
- a DNA sequence (a DNA having the base sequence) encoding a protein having a function of binding to a modified low-density lipoprotein (ie, a receptor).
- the present invention relates to a degenerate low-density lipoprotein of vascular endothelial cells of a powerful mammal, which is degenerate as a result of the genetic code with the DNA sequence shown in SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 3.
- a DNA sequence (a DNA having the base sequence) encoding a protein having a binding function (that is, a receptor).
- the present invention relates to a modified low-density riboprotein receptor (or SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 2) corresponding to DNA having the nucleotide sequence shown in SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 3, or an analog thereof.
- Antibodies of the modified low-density lipoprotein receptor containing the amino acid sequence shown in 3 or its analog are particularly preferred.
- the DNA sequence provided by the present invention can be used by incorporating it into an expression vector. 9/17058 PC
- the present invention provides a modified low-density lipoprotein receptor for mammalian vascular endothelial cells or an analog thereof, comprising inserting the recombinant expression vector into a host cell and culturing the host cell under conditions that cause expression. Also provides a method of producing.
- the present invention also provides a protein composition containing the modified low-density riboprotein receptor for mammalian vascular endothelial cells having biological activity produced as described above or an analog thereof.
- the modified low-density riboprotein receptor for mammalian vascular endothelial cells produced in this way, its analogs, and protein compositions containing them are useful for the identification of modified low-density lipoproteins in mammals and used for diagnosis. It is also useful for preparing an antibody against the modified low-density riboprotein receptor.
- the efficacy of the drug of the present invention in diagnosing arteriosclerosis is evident from the biological activities of the above-mentioned modified low-density lipoprotein and its receptor.
- the term "denatured low-density riboprotein receptor” refers to a receptor capable of binding to a denatured low-density riboprotein, and adopting the original configuration similar to the cell membrane protein of mammalian vascular endothelial cells.
- the term includes analogs of naturally occurring proteins that bind to denatured low density lipoprotein or have signaling activity.
- Subtype of modified low-density lipoprotein receptor refers to various modified low-density lipoproteins such as oxidized-denatured low-density lipoprotein or acetylated low-density lipoprotein among modified low-density riboprotein receptors Mean different molecules exhibiting different selectivity, i.e., pharmacological compatibility.
- the expression “substantially” in “a sequence substantially consisting of a coding region” or the like used in a DNA sequence refers to a specific target sequence, for example, a displaced sequence, A sequence which is changed by one or more substitutions, deletions or additions of the reference sequence shown in SEQ ID NO: 2 or SEQ ID NO: 3, and the overall action is the same as that of the reference sequence! : Used to include sequences that do not result in disadvantageous functional differences.
- the region encoding the variable low-density riboprotein-binding region is the same as or similar to the reference sequence shown in SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3, except for the degeneracy of the genetic code. It is necessary to have a sequence that has been modified to such an extent that substitution to an amino acid is performed. On the other hand, a region encoding a portion other than the above may have a similarity of 30% or more (preferably 50% or more, more preferably 80% or more).
- substitution with similar amino acids means substitution of amino acids within each group when natural amino acids are classified into the following eight groups.
- biologically active when used as a characteristic of a denatured low density lipoprotein receptor is capable of binding a specific molecule to a denatured low density lipoprotein.
- biologically active when used as a characteristic of a denatured low density lipoprotein receptor is capable of binding a specific molecule to a denatured low density lipoprotein.
- the affinity for the standard low-density lipoprotein is 1 micromolar or less.
- the affinity is preferably 0.1 micromol or less, more preferably 0.01 micromol or less.
- Biological activity can also mean that upon binding of the modified low-density riboprotein, it can promote uptake of the modified low-density lipoprotein into vascular endothelial cells.
- DNA sequence refers to a DNA polymer that exists as a fragment or component separated from a large DNA construct, which originated at least once from DNA that was isolated in substantially pure form. I do.
- sequence and its base sequence can be recovered using identification, manipulation, and standard biochemical methods, such as cloning vectors, without isolation of endogenous substances. It is present in moderate amounts or concentrations.
- sequences are provided with an open reading frame that is not interrupted by endogenous untranslated sequences (introns) typical of eukaryotic genes.
- chromosomal DNAs containing strong and related sequences may also be used.
- the untranslated DNA is at the 5 'or 3' of the open reading frame, in which case the untranslated sequence will not interfere with manipulation or expression of the coding region.
- a “recombinant expression vector” is defined as (a) an element having a regulatory role in gene expression, eg, one or more genetic elements such as a promoter or enhancer,
- a plasmid consisting of a transcription unit containing an appropriate set of transcription and translation initiation and termination sequences.
- Structural elements for use in yeast expression systems preferably include a leader sequence for the translated protein to be secreted extracellularly by the host cell. If the recombinant protein is expressed without a leader or transport sequence, the protein may contain a N-terminal methionine residue. Then, Are optionally cleaved from the expressed recombinant protein to give the final product.
- FIG. 1 is a schematic diagram of the high expression plasmid vector for mammalian cells pME18S used in Example 1.
- FIG. 2 is a graph showing FACS fluorescence intensity distributions of COS-7 cells into which PBLOX-1 has been introduced and COS-7 cells as a control to which PBLOX-1 has not been introduced.
- FIG. 3 is a fluorescence micrograph showing an increase in fluorescence intensity in the cytoplasm due to administration of DiI-labeled denatured low density riboprotein.
- a DNA sequence encoding a human denatured low-density lipoprotein receptor was isolated.
- This library uses a mammalian expression vector (pME18S) containing regulatory sequences derived from SV40, type I human T cell leukemia virus, and the DNA accumulated in monkey COS17 cells. Screening was performed by expressing mRNA directly from the fragment.
- Transduced COS-7 cells were incubated with medium containing DiI (1,1-di-octadecyl-3,3,3,3-tetramethyl indocarbocyanine perchl orate) low density lipoprotein and did not bind After washing to remove the oxidized low-density lipoprotein, the cells were suspended by trypsinization and subjected to FACS (fluorescence-activated cell sorter). High cells were collected. The plasmid was extracted from the transduced cells, Escherichia coli was transformed, the plasmid was purified, and the above operation was repeated again.
- FACS fluorescence-activated cell sorter
- SEQ ID NO: 1 and SEQ ID NO: 2 show the DNA sequence encoding the modified low-density riboprotein receptor determined as described above and the corresponding amino acid sequence.
- SEQ ID NOS: 1 and 2 there are at least two subtypes of the modified low-density riboprotein receptor.
- SEQ ID NO: 2 is the same as SEQ ID NO: 1 except that three amino acids (Thr Thr Gly) are inserted after the 24th amino acid (Gly) of SEQ ID NO: 1. In the present specification, unless otherwise specified, the description is based on SEQ ID NO: 1.
- variable low-density lipoprotein receptor mRNA which is encoded by this cDNA, there are seven places in the 3 'untranslated region that destabilize the mRNA AUUUA, similar to the transiently expressed cytokine ⁇ growth factor. Exists.
- This polypeptide has a transmembrane region consisting of 26 hydrophobic amino acids (amino acids 31-56 in SEQ ID NO: 1 and amino acids 34-59 in SEQ ID NO: 2) at one position.
- hydrophobic amino acids amino acids 31-56 in SEQ ID NO: 1 and amino acids 34-59 in SEQ ID NO: 2
- Four glycosylation sites amino acids 69, 135, 179 and 208 in SEQ ID NO: 1, amino acids 72, 138, 182 and 211 in SEQ ID NO: 2 were found on the C-terminal side of the portion.
- a DNA sequence encoding a human modified low-density lipoprotein receptor was isolated from a cDNA library prepared by reverse transcription of Poly (A) + RNA extracted from human lung. Screening of this library was performed by the random hybridization method with the Xhol / Pstl-cut fragment of pBMLRl labeled with [a-32P] dCTP by the black hybridization method. Hybridization was performed at 55 "C in 50mM Tris-HC 1 ( ⁇ 7.5), 1M NaCl, 13 ⁇ 4SDS, 0.2g / l yeast tRNA, 55. 2xSS of C After washing three times for 15 minutes in C / 0.1% SDS, positive clones were identified by autoradiography.
- This clone was isolated and the insert sequence was examined to determine the cDNA sequence of the human modified low-density riboprotein receptor. This sequence was considered to include only a portion of the region encoding the protein. Therefore, using the 5'-RACE (rapid amplification of cDNA end) method based on the BE sequence obtained from cDNA prepared by reverse transcription of Poly (A) + RNA generated from human placenta, Then, the cDNA was obtained and its sequence was determined by obtaining the cDNA encoding the entire protein.
- 5'-RACE rapid amplification of cDNA end
- SEQ ID NO: 3> This is the DNA sequence and amino acid sequence of the human modified low-density riboprotein receptor.
- the human sequence has a 810 bp open reading frame from the first ATG (the initiation codon coding for methionine) to TGA (81 1-813), and has a 270 amino acid residue. Is coded.
- the polypeptide encoded by this cDNA has a portion that seems to be a transmembrane region consisting of 27 hydrophobic amino acids at one position, similar to the sequence of the peptide, and is located at the C-terminal side of the transmembrane portion.
- Four glycosylation sites (amino acids 69, 135, 179 and 206) were found.
- amino acids 140-270 Both the amino acid sequences of human and human have the extracellular domain of C-type lectin, and this portion (amino acids 140-270) is considered to be important for binding to denatured LDL. Therefore, a peptide having a partial sequence of amino acids 140 to 270 can also be presumed to have a binding function with modified LDL.
- the present invention provides a DNA sequence encoding the modified low-density riboprotein receptor described above, and a DNA sequence encoding the partial sequence of amino acid number 14 ° -270.
- the DNA sequence is preferably provided in a form that can be expressed in a mammalian or microbial-regulated recombinant transcription unit or a viral transcription or translation regulatory element. For example, sequences expressed in microorganisms do not contain introns.
- the DNA sequence comprises at least one, but optionally one or more cDNA sequences or sequence components derived therefrom. Such a sequence is adjacent or adjacent to a DNA sequence prepared by assembling a synthetic oligonucleotide.
- Oligonu Synthetic genes assembled from nucleotides can be constructed using the sequence information provided here.
- Typical sequences include sequences that are substantially identical to those described above.
- the coding sequence includes codons encoding one mi oral amino acid located at the N-terminus, for example, the N-terminal ATG codon specifying the methionine linked to the translation frame on the nucleotide sequence. be able to. Due to the degeneracy of the genetic code, there is considerable diversity in nucleotide sequences encoding the same amino acid sequence.
- the typical DNA sequence includes sequences that can be hybridized.
- Other sequences are degenerate to those described above, which encode a modified low density lipoprotein receptor peptide having biological activity.
- the above sequence is the ability to be expressed in a recombinant transcription unit containing an inducible control element from a microbial or viral operant.
- the present invention also provides an expression vector for producing a useful amount of a purified modified low-density riboprotein receptor.
- the vector of the present invention may be a mammalian low-density low-density lipoprotein receptor or a biologically linked low-density lipoprotein receptor linked to a regulatory element derived from a mammal, a microorganism, a yeast, a pacteriophage or a viral gene. Or a DNA fragment derived from a synthetic or cDNA encoding a highly equivalent analog.
- the adjustment elements that can be used are described in detail below.
- Mammalian modified low-density riboprotein receptor can be expressed in mammalian cells, yeast, bacteria, or other cells under the control of appropriate promoters.
- the mammalian low-density lipoprotein receptor can also be produced by the cell-free translation system using mRNA derived from the DNA construct of the present invention.
- Suitable cloning and expression vectors for use in bacterial, fungal, yeast and mammalian cell hosts are described by Pouwel et al. (Cloning Vectors: A Laboratory Manual, Elsby, NY, (1985)). Has been stated.
- Suitable mammalian host cell lines include Gluzman (Cell, 23, 175 (1981)). ), And cell lines capable of expressing vectors such as the CI27, 3T3, CHO, HeLa and BHK cell lines.
- Mammalian expression vectors contain an origin of replication, a suitable promoter and non-transcribed elements such as enhancers, non-transcribed sequences flanking the 5 'or 3', as well as essential ribosome binding, polyadenylation, and splice donors. It contains 5 'or 3' untranslated sequences, such as (splice donor) and executor sites, and termination sequences.
- DNA sequences from the SV40 viral genome such as the SV40 origin of replication, early promoter, enhancer, splice and polyadenylation sites, provide other genetic elements required for the expression of heterologous DNA sequences.
- Typical vectors are Okayama and Berg (Mol.
- Saccharomyces species such as Saccharomyces cerevisiae.
- yeasts of other genera such as Pichia or Kluyvero myces, can also be used as recombinant protein production strains.
- useful yeast vectors have an origin of replication and are compatible for use in both yeast and E. coli transformations, such as the ampicillin-resistant Ampr gene in E. coli and the TRP1 gene in Saccharomyces cerevisiae.
- Structure of the selectable marker stream It contains a promoter derived from a highly expressed gene in yeast that induces gene transcription.
- a promoter is the enzyme 3-phosphoglycerate phosphatase, derived from a yeast transcription unit that encodes highly expressed genes such as ⁇ -factor, acid phosphatase and heat shock proteins.
- This heterologous structural sequence is assembled in an appropriate frame with a translation initiation and termination sequence and, preferably, a leader sequence that enables secretion of the translated protein into the extracellular medium.
- heterologous sequence described above may be an identifiable peptide at the ⁇ -terminus or, for example, the safety of the expressed recombinant product. It is also possible to arbitrarily code for a fusion protein containing a sequence that provides the desired characteristics, such as to perform stabilization or to simplify purification.
- Useful yeast vectors include yeast DNA containing the PBR322-derived DNA sequence (Ampr gene and origin of replication) and the glucose-repressed alcohol dehydrogenase 2 (ADH2) promoter for selection and replication in E. coli. It can be assembled by using the A sequence.
- the ADH2 promoter is disclosed by Russell et al. (See Biol. Chem., 258, 2674 (1982)) and Beier et al. (Nature, 300, 724 (1982)). These vectors also have the yeast TRP1 gene as a selectable marker and contain a yeast 2 origin of replication.
- Yeast leader sequences such as ⁇ -factor leaders that direct the secretion of heterologous proteins from yeast hosts, can be inserted between the promoter and the structural gene to be expressed (US Patent No. 4,546,082; Kurian et al., Cell, 30, 933 (1982); and Bittner et al., Proc. Natl. Acad. Sci. USA 81, 983 (1984)).
- the leader sequence can be modified to include, near its 3 'end, one or more useful restriction enzyme cleavage sites to facilitate fusion of the leader sequence with the foreign gene.
- Suitable yeast transformation methods are well known to those skilled in the art; typical techniques are described by Hinnen et al. (Proc. Natl. Acad. Sci. USA 75: 1978); Tributofan-positive transformants were purified with 0.67% yeast nitrogen source, 0.5% casamino acids, 2% glucose, 1% Select on a selective medium consisting of adenine and 2 ⁇ g Zm 1 ⁇ l.
- a host strain transformed with a vector consisting of the ADH2 promoter was used for expression in a nutrient-rich medium containing 1% yeast extract, 2% peptone, 1% dextrose, 80 ig / ml adenine, and 80 gZml To grow.
- Deregulation of the ADH2 mouth motor occurs when glucose in the medium has been consumed.
- Crude yeast supernatant is collected by filtration and kept at 4 ° C before subsequent purification.
- a useful expression vector for use in bacteria is to insert the DNA sequence encoding the mammalian low-density low-density riboprotein receptor into a functional, open reading frame with appropriate translation initiation and termination signals. It is built by things. This vector is It contains one or more phenotypic selectable markers and an origin of replication that ensures growth in the host.
- Prokaryotic hosts suitable for transformation include Escherichia coli, Bacillus subtilis, Salmonella typhiimirium, and various species of Streptomyces (Pseudomonas) from the genus Pseudomonas. ces), Staphylococcus (Staphylococcus), and other powers can also be selected for selection.
- Expression vectors are conveniently constructed by cutting the cDNA at a site near the codon that encodes the N-terminal residue of the mature protein. Then, a linking sequence is provided to “make up” the missing portion of the coding region, or to ligate the code fragment so as to be a codon specifying an appropriate reading frame or initiation methionine in the expression vector. It is also possible to use synthetic oligonucleotides at any time.
- a useful expression vector for use in bacteria is the selection of a commercially available plasmid consisting of the genetic elements of the well-known cloning vector pBR322 (ATCC3 7017). Markers and origins of bacterial replication may be included.
- Such commercially available vectors include, for example, PKK 223-3 ⁇ (Pharmacia's Fine Chemicals, Uppsala, Sweden) and PGEM1 (Brogema's Biotech, Madison, Wyoming, USA).
- the "backbone" portion of these PBR322 is linked to a suitable promoter and the structural sequence to be expressed.
- a particularly useful bacterial expression system uses the phage PL promoter and the c1857 thermolabile reblesser.
- Plasmid vectors containing a promoter derived from itPL obtained from American Type and Culture Collection include pHUB2 plasmid in E. coli strain JMB9 (ATCC37092) and E. coli strain RR1 (ATCC53082). There is pPL c28 in the shape shown below.
- Other promoters useful for expression in E. coli include the T7 RNA polymerase promoter, Laue, described by Studier et al. (See Mol. Biol. 189: 113, 1986). (Lauer) Appl. Genet. 1: 139-147, 1981) and obtained as ATCC 37121, a 1 a cZ promoter — and Maniatis (Molecular Coloning; A Laboratory Manual, Cold ATCC 37, as described by the Spring Harbor Laboratory, 1982.
- the selected promoter is derepressed by an appropriate method (eg, by temperature shift or chemical induction) to further reduce the bacterial activity.
- an appropriate method eg, by temperature shift or chemical induction
- Culture for a while Cells are usually collected by centrifugation, disrupted by physical or chemical methods, and the resulting crude extract is retained for subsequent purification. For example, cells are grown in a 10 liter incubator under conditions of maximum aeration and vigorous stirring. It is preferred to use an antifoaming agent (Antifoam A).
- Antifoam A an antifoaming agent
- the cultivation was carried out at 30 in a super-induction medium disclosed by Mott et al. (Proc. Natl. Acad. Sci. USA 82: 88, 1985) or, alternatively, contained antibiotics.
- the cells are first concentrated by manual or other means, then centrifuged at 10.0 x g for 10 minutes at 4 and immediately freeze the pellet of cells.
- the purified mammalian modified low-density riboprotein receptor or biologically equivalent analog is suitable for expressing the recombinant translation product of the synthetic gene of the present invention, which is purified from the culture solution. It is prepared by culturing the host vector system.
- Another method of producing purified modified low-density riboprotein receptor involves purification from cell culture supernatants or extracts. This method uses a cell line that produces useful amounts of protein. The supernatant from such a cell line can be concentrated at any time using a commercially available protein concentration filter paper such as an Amicon or Millipore Falcon ultrafiltration device. Following the concentration procedure, the concentrate is applied to a suitable purification matrix as described above.
- a suitable affinity matrix comprises a modified low density lipoprotein receptor or lectin or antibody molecule bound to a suitable support.
- an anion exchange resin such as a carrier or matrix having getylaminoethyl (DEAE) groups may be used.
- cation exchange resin preferably sulfopropyl groups containing various insoluble matrices consisting of sulfopropyl groups or carboxymethyl groups.
- RP-HPLC reversed-phase high-performance liquid chromatography
- a hydrophobic packing material such as silicic acid gel containing methyl or other aliphatic groups, is used to convert denatured low-density riboprotein receptor
- the composition can be used to further purify the composition. By variously combining some or all of the above purification steps, a homogeneous recombinant protein may be obtained.
- Recombinant proteins produced by bacterial culture are usually extracted from cell pellets, and then subjected to one or more steps of concentration, salting out, ion exchange of the aqueous phase, or gel-permeation chromatography. Separated. Finally, high performance liquid chromatography (HPLC) can be used as a final purification step.
- HPLC high performance liquid chromatography
- the microbial cells used to express the recombinant mammalian denatured low-density riboprotein receptor can be obtained by any convenient method, including freeze-thaw cycles, sonication, physical disruption, or use of cell lysis reagents. Can also be destroyed.
- Yeast expression which expresses the mammalian modified low-density lipoprotein receptor as a secreted protein, greatly facilitates purification.
- the secreted recombinant protein resulting from large-scale fermentation can be purified by a method similar to that disclosed by Urdal et al. (Supra Chromatog. 296: 171, 1984). is there.
- This reference describes a two-step, continuous reverse-phase HPLC treatment on a preparative HPLC column for the purification of recombinant human GM-CSF.
- the present invention relates to recombinant mammalian modified low-density lipoprotein receptor polypeptides that are substantially uniform, with or without contaminating endogenous materials, with or without native glycosylation modes. Is provided.
- the recombinant low-density lipoprotein receptor protein of the present invention is fused with an appropriate peptide or protein sequence to aid expression in microorganisms or purification of the protein expressed by microorganisms.
- Mammalian expressed as protein Modified low density riboprotein receptors are also contemplated by the present invention.
- a biologically equivalent analog of the protein of the present invention is a terminus that is not required for biological activity, or a residue or sequence inside a cell that is shortened such as a truncated modified low-density riboprotein receptor. And various analogs.
- mutant amino acid sequence refers to a polypeptide encoded by a variant nucleotide sequence deliberately made from a native sequence.
- mutant protein or “analog” refers to a protein comprising a mutated amino acid sequence.
- Native sequence refers to an amino acid or nucleotide sequence identical to a wild-type or natural form of a gene or protein.
- the protein of the denatured low-density lipoprotein receptor can be cleaved with an appropriate protease, or a part of the denatured low-density riboprotein receptor can be expressed in Escherichia coli, mammals, etc. by recombinant DNA methods.
- a solubilized peptide fragment may be obtained.
- Such a peptide fragment is also included in the scope of the present invention as long as it has the above-mentioned definition, that is, as long as it can bind to the denatured low-density riboprotein.
- the solubilized peptide fragments bind to the denatured low-density riboprotein, thereby inactivating lipoproteins.
- the ability of peptide fragments to be used in the treatment of diseases caused by denatured low-density riboprotein is a powerful feature.
- DNA encoding the modified low density lipoprotein receptor of the vesicle can be obtained. This is different from the case where the relevant DNA is selected from the situation where there is no key sequence power s as in Example 1 below, and is easily implemented by those skilled in the art.
- an assay for oxidized low-density lipoprotein binding and an assay for acetylated low-density riboprotein binding can be similarly performed.
- cDNA was obtained by reverse transcription of Poly (A) + -added mRNA isolated from total RNA extracted from whole aortic endothelial cells.
- a library was made. Specifically, the cells were dissolved in a solution of guanidium acid isothianoate Z-phenol, and the lysate was added to a clonal form, and the aqueous layer and the organic layer were centrifuged. The aqueous layer was collected and further purified by alcohol precipitation.
- the pME18S vector is a 3.4 kb plasmid vector created containing the SV40 replication origin and the SV40Z human T cell leukemia virus type 1 promoter.
- E. coli aorta cDNA library on PME18S prepared as described above was used to transform E. coli (ElectroMax DH10B) to obtain about 7 ⁇ 10 5 colonies. These recombinants were 37 in 500 ml of 2 x YT. After culturing with shaking at C, the plasmid DNA was prepared by CsC1 density gradient centrifugation. Lipofectamine was used to transfect monkey COS-7 cells into non-confluent (subconfluent) cell monolayers. Then culturing the cells for 3 days so as possible out of the introduced sequences force s transient expression, monolayers of each plate of cells were Atsusi respect oxidized low-density lipoprotein binding as follows.
- the Bureto 15 g of D il labeled oxide 10% fetal bovine serum (FBS) in DMEM medium 5 m 1 containing low-density lipoprotein was added, 37, 5% C0 were incubated for 12 hours at 2 under. Next, the medium was removed, and the cells were washed twice with PBS (pH 7.4), and the cells were detached from the plate by treatment with tribcine. The cells were subjected to FAC, fluorescence of DiI was measured, and cells having high fluorescence intensity were collected. The plasmid was extracted from the collected cells, and the above operation was repeated four times.
- FBS fetal bovine serum
- FIG. 2 is a graph showing FACS fluorescence intensity distributions of COS-7 cells into which pBLOX-1 has been introduced and COS-7 cells as a control into which pBLOX-1 has not been introduced.
- RNA was extracted from each tissue of the pest by the method described above, and 5 g of each was extracted with formaldehyde 1. After separation by 1% agarose gel electrophoresis, it was transferred to GeneScreen Plus membrane (NEN, DuPont). 1. Using cDNA A fragment 8kb as a label to a probe so as to 8x 10 beta cpm Bruno mg of alpha-32 .rho. dCTP by the random blanking lime method. Hybridization was performed in 1 M sodium chloride 1% SDS, 250 ⁇ g Zm1 salmon sperm DNA solution at 60 ° C., and washed with 2 ⁇ SSCZ1% SDS. Autoradiography lasted 8 hours.
- the denatured low-density lipoprotein receptor cDNA insert was replaced with bsr (blasticidin S-res (istance) Gene and a modified low-density lipoprotein receptor-expressing plasmid pBL0X-1 using expression vector PS V2bsr containing SV40 virus-derived promoter and modified low-density riboprotein receptor-expressing cells did.
- CHO (Chinese hamster ovary) 1 cells were monolayer cultured in subconfluent in a ⁇ amF12 medium containing 10% FBS.
- the denatured low-density riboprotein receptor expressing plasmids pBLOX-1 and pSV2bsr were transfected into CH0-K1 cells by Lipofectamine. After 24 hours, the transfected cells were re-spread on an approximately 10-fold culture area. After waiting for 24 hours, the cells were sufficiently adhered, and the medium was replaced with the above medium containing 5 wg of blasticidin S.
- Fig. 3 shows the fluorescence micrograph.
- the modified low-density lipoprotein receptor c DN A to PC R method Buraimapea (5'- gcggatcctgtgctc tcaatagatt cgc- 3 1, 5 '- ggggatcctgat ctcataaagaaacag- 3') Te use Rere the extracellular domain (modified low-density A DNA sequence (including the riboprotein-binding portion) (160 to 813 in the nucleotide sequence of SEQ ID NO: 1) is propagated with a BamHI restriction enzyme site, digested with BamHI, and histidine repeated six times.
- Escherichia coli was recovered by centrifugation, and dissolved in 6M guanidine hydrochloride, 0.1M sodium dihydrogen phosphate, and 0.01M Tris (pH 8.0). After removing insoluble matter by centrifugation, Ni-NTA agarose (manufactured by Qiagen) was added to adsorb the soluble denatured low-density riboprotein receptor.
- the tag may be another one such as GST or c-myc.
- a method using an antibody or the like can be used as the purification method accordingly.
- a soluble modified low-density riboprotein receptor can be similarly produced by manipulation of recombinant DNA.
- a region encoding the extracellular domain of LOX-1 cDN A (amino acids 6 to 270) was synthesized by the polymerase chain reaction. The two primers, BamHI, were added to the primers. Amplified by After the amplified cDNA fragment was digested with BamHI, it was subcloned into the BamHI site of the pQE10 vector from QIAGEN. The synthesis and production of extracellular domain proteins were performed using Qiagen's QIA express system. In practice, Escherichia coli strain XL-1 blue from Stratagene was transformed with the above plasmid and cultured in 2xYT medium.
- Protein synthesis was induced by adding isopropyl'thio 3-D-galactoside to a final concentration of 2 mM. Collect cells by centrifugation, Guanidine * ⁇ ⁇ (: Dissolved in a pH 8.0 solution containing 1, 0.1 M sodium phosphate and 0.01 M Tris ⁇ HC1, then applied to Qiagen's NiNTA resin ram to perform column chromatography. Then, 8M urea, 0.1M sodium phosphate, and 0.
- O IM-Tris • After washing the column with a pH 6.3 aqueous solution containing HC1, wash the protein with 8 M urea, 0.1 M-EDTA, 0.1 M sodium phosphate, and 0.01 M M Tris ⁇ pH 6.3 containing HC1. Was eluted using the above solution. The buffer was exchanged for phosphate-buffered saline with Amicon Centriprep 10, and the protein was emulsified with an equal volume of Freund's Complete Adjuvant. Immunization was performed by inoculation.
- the cultured aortic endothelial cells were directly lysed in a sample buffer of SDS-PAGE, separated by SDS-PAGE, and transferred to a nylon membrane. After blocking with a block ace manufactured by Snow Brand Milk Products Co., Ltd., using the vector immunoblotting kit (Vector), a peroxidase conjugated avidin-biotin complex was used to perform the standard method from the above-mentioned egret. The obtained antiserum was stained.
- Sequence type nucleic acid
- Tissue type vascular endothelial cells
- Sequence type nucleic acid
- Tissue type vascular endothelial cells
- Sequence type nucleic acid
- Tissue type human lung, placenta
- ATC CAG CAA GCA ⁇ TCC TAT TCC AGT ⁇ 600 lie Gin Gin Ala lie Ser Tyr Ser Ser Phe
- Val Tyr Ala Glu Asn Cys lie Leu Ala Ala
- Phe Ser lie Cys Gin Lys Lys Ala Asn Leu Arg Ala Gin
- An object of the present invention is to elucidate the structure of a modified low-density riboprotein receptor of a vascular endothelial cell, thereby providing a sequence encoding a modified low-density lipoprotein receptor of a vascular endothelial cell.
- Another object of the present invention is to provide a method for producing a modified low-density riboprotein receptor or an analog thereof.
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US08/809,494 US5962260A (en) | 1994-11-30 | 1995-11-30 | Recombinant production of human and bovine receptors for modified low-density lipoprotein |
CA002200980A CA2200980C (en) | 1994-11-30 | 1995-11-30 | Mammalian receptors for modified low-density lipoprotein |
AU39939/95A AU693289B2 (en) | 1994-11-30 | 1995-11-30 | Denatured low-density lipoprotein receptor |
DE69535063T DE69535063T2 (de) | 1994-11-30 | 1995-11-30 | Denaturierter low-density lipoprotein (ldl) rezeptor |
EP95938615A EP0795605B1 (en) | 1994-11-30 | 1995-11-30 | Denatured low-density lipoprotein receptor |
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Cited By (3)
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WO1997040069A2 (en) * | 1996-04-19 | 1997-10-30 | Genetics Institute, Inc. | Secreted proteins and polynucleotides encoding them |
WO1998004585A3 (en) * | 1996-07-31 | 1998-03-12 | Incyte Pharmaceutical Inc | Novel human macrophage antigen |
WO2001064862A1 (fr) * | 2000-03-02 | 2001-09-07 | Abgenix, Inc. | Anticorps monoclonaux humains diriges contre le recepteur des ldl oxydees, et utilisation medicale associee |
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EP1717314B1 (en) * | 1994-11-30 | 2010-10-06 | Nippon Chemiphar Co., Ltd. | Receptor for modified low-density lipoprotein |
JP2002017353A (ja) * | 1997-12-19 | 2002-01-22 | Japan Tobacco Inc | 変性ldlの定量方法 |
US5945308A (en) * | 1998-04-03 | 1999-08-31 | Incyte Pharmaceuticals, Inc. | Human oxidized LDL receptor |
JP5232818B2 (ja) * | 1998-08-06 | 2013-07-10 | 達也 沢村 | 酸化ldl受容体に対する抗体を含んでなる医薬組成物 |
US7013021B2 (en) * | 1999-03-19 | 2006-03-14 | Digimarc Corporation | Watermark detection utilizing regions with higher probability of success |
WO2000073479A1 (en) * | 1999-05-28 | 2000-12-07 | The Government Of The United States Of America, As Represented By The Secretary, Department Of Health And Human Services | A combined growth factor-deleted and thymidine kinase-deleted vaccinia virus vector |
AU2006203702B2 (en) * | 2000-03-02 | 2009-07-16 | Abgenix, Inc. | Human monoclonal antibodies against oxidized LDL receptor and medicinal use thereof |
US6756228B2 (en) * | 2001-07-02 | 2004-06-29 | The Trustees Of Columbia University In The City Of New York | Atherosclerosis susceptibility gene locus 1 (Athsq1) and atherosclerosis susceptibility gene locus 2 (Athsq2) |
US20050089471A1 (en) * | 2003-10-24 | 2005-04-28 | Johnson Bruce F. | Labeled ligands for lectin-like oxidized low-density lipoprotein receptor (LOX-1) |
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US20230243855A1 (en) | 2020-03-03 | 2023-08-03 | Shinshu University | Method for quantifying adiponectin and analytical reagent used thereof |
EP4130030A4 (en) | 2020-03-30 | 2024-03-27 | Tatsuya Sawamura | QUANTIFICATION METHOD FOR MODIFIED HDL AND ANALYSIS AGENT FOR USE IN THIS METHOD |
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EP1717314B1 (en) * | 1994-11-30 | 2010-10-06 | Nippon Chemiphar Co., Ltd. | Receptor for modified low-density lipoprotein |
JPH09163988A (ja) * | 1995-10-09 | 1997-06-24 | Kowa Co | 新規なldl受容体類似蛋白質及び遺伝子 |
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- 1995-11-30 EP EP06012158A patent/EP1717314B1/en not_active Expired - Lifetime
- 1995-11-30 PT PT95938615T patent/PT795605E/pt unknown
- 1995-11-30 US US08/809,494 patent/US5962260A/en not_active Expired - Lifetime
- 1995-11-30 DK DK95938615T patent/DK0795605T3/da active
- 1995-11-30 AT AT06012158T patent/ATE483808T1/de not_active IP Right Cessation
- 1995-11-30 WO PCT/JP1995/002444 patent/WO1996017058A1/ja active IP Right Grant
- 1995-11-30 CA CA002200980A patent/CA2200980C/en not_active Expired - Fee Related
- 1995-11-30 AT AT95938615T patent/ATE330010T1/de active
- 1995-11-30 AU AU39939/95A patent/AU693289B2/en not_active Ceased
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- 1995-11-30 JP JP33423495A patent/JP3919839B2/ja not_active Expired - Lifetime
- 1995-11-30 DE DE69535063T patent/DE69535063T2/de not_active Expired - Lifetime
- 1995-11-30 EP EP95938615A patent/EP0795605B1/en not_active Expired - Lifetime
- 1995-11-30 DE DE69536113T patent/DE69536113D1/de not_active Expired - Lifetime
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1998
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1997040069A2 (en) * | 1996-04-19 | 1997-10-30 | Genetics Institute, Inc. | Secreted proteins and polynucleotides encoding them |
WO1997040069A3 (en) * | 1996-04-19 | 1998-02-05 | Genetics Inst | Secreted proteins and polynucleotides encoding them |
US5958726A (en) * | 1996-04-19 | 1999-09-28 | Genetics Institute, Inc. | Secreted proteins and polynucleotides encoding them |
WO1998004585A3 (en) * | 1996-07-31 | 1998-03-12 | Incyte Pharmaceutical Inc | Novel human macrophage antigen |
WO2001064862A1 (fr) * | 2000-03-02 | 2001-09-07 | Abgenix, Inc. | Anticorps monoclonaux humains diriges contre le recepteur des ldl oxydees, et utilisation medicale associee |
US7993643B2 (en) | 2000-03-02 | 2011-08-09 | Amgen Fremont, Inc. | Uses of human monoclonal antibodies against oxidized LDL receptor |
Also Published As
Publication number | Publication date |
---|---|
DE69536113D1 (de) | 2010-11-18 |
PT795605E (pt) | 2006-10-31 |
JP2006271386A (ja) | 2006-10-12 |
EP0795605A4 (en) | 1999-11-03 |
US6197937B1 (en) | 2001-03-06 |
ATE483808T1 (de) | 2010-10-15 |
JP4203077B2 (ja) | 2008-12-24 |
US5962260A (en) | 1999-10-05 |
JP3919839B2 (ja) | 2007-05-30 |
DK0795605T3 (da) | 2006-10-09 |
AU693289B2 (en) | 1998-06-25 |
EP1717314B1 (en) | 2010-10-06 |
JP4203097B2 (ja) | 2008-12-24 |
EP0795605B1 (en) | 2006-06-14 |
CA2200980C (en) | 2009-09-22 |
EP0795605A1 (en) | 1997-09-17 |
DE69535063D1 (de) | 2006-07-27 |
ES2265149T3 (es) | 2007-02-01 |
JPH0998787A (ja) | 1997-04-15 |
DE69535063T2 (de) | 2006-12-21 |
AU8711098A (en) | 1998-11-12 |
JP2007175053A (ja) | 2007-07-12 |
AU710373B2 (en) | 1999-09-16 |
ATE330010T1 (de) | 2006-07-15 |
CA2200980A1 (en) | 1996-06-06 |
JP2008263992A (ja) | 2008-11-06 |
EP1717314A1 (en) | 2006-11-02 |
AU3993995A (en) | 1996-06-19 |
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