WO2007029641A1 - 軽度の低温により遺伝子の発現を促進させる配列 - Google Patents
軽度の低温により遺伝子の発現を促進させる配列 Download PDFInfo
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- WO2007029641A1 WO2007029641A1 PCT/JP2006/317452 JP2006317452W WO2007029641A1 WO 2007029641 A1 WO2007029641 A1 WO 2007029641A1 JP 2006317452 W JP2006317452 W JP 2006317452W WO 2007029641 A1 WO2007029641 A1 WO 2007029641A1
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/85—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
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- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/10—Cells modified by introduction of foreign genetic material
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- C12N2830/00—Vector systems having a special element relevant for transcription
- C12N2830/001—Vector systems having a special element relevant for transcription controllable enhancer/promoter combination
Definitions
- the present invention relates to a mild low-temperature transcription control element (oligonucleotide) that promotes gene transcription at a mild low temperature and to an enzyme sensor that includes the mild low-temperature transcription control element.
- the present invention also relates to an assembly method and a purification method for a mild low temperature transcription control factor (protein) using the mild low temperature transcription control element.
- the yield of the target protein may be reduced due to a decrease in the target protein.
- the low temperature shock protein CspA promoter and 5, untranslated region (UTR) are used as an expression promoter for the target protein.
- UTR untranslated region
- fission yeast the simplest eukaryote, has a genome size of 13 million base pairs and a small cocoon has the basic functions of eukaryotic cells, and has a gene strength intron of 30% or more.
- human genes with high amino acid sequence conservation with known human homologous genes are normally expressed in the yeast, and functional analysis is easy.
- fungi including yeast, and cells derived from eukaryotes closer to humans, such as plants, linear animals, insects, fish, amphibians, birds, etc. should have appropriate genes as necessary.
- Non-patent literature 1 Kauftnann H, Mazur X, Marone R, Bailey JE, Fussenegger M. Biotech nol. Bioeng. 2001 Mar 20; 72 (6): 592-602
- Non-Patent Document 2 Yoon SK, Song JY, Lee GM., Biotechnol. Bioeng. 2003 May 5; 82 (3): 289-98
- Non-patent literature 3 Fujita J., J. Mol. Microbiol. Biotechnol. 1999 Nov; l (2): 243-55
- Non-patent literature 4 Molecular Biology of the Cell. 4th edition, Alberts B, Johnson A, Lewis J,
- An object of the present invention is to provide a method for increasing the protein yield per unit time per cell at a low temperature and increasing the total yield.
- An object of the present invention is to provide a method for identifying and purifying a mild low-temperature transcription factor (protein).
- xl represents c, t, or a
- x5 represents g, c, a, or t
- x6 represents c, t, a, or g
- x7 represents c, a, , G, or t
- nucleotide sequences that is, the present invention provides nucleotide sequences:
- a mild low-temperature transcription control element consisting of a nucleotide sequence complementary to this sequence.
- millild low temperature transcription control element refers to a unit of nucleotide sequence that specifically promotes transcription of a gene at a low temperature.
- mild low temperature means a temperature of 15 to 36 ° C., preferably 30 to 34 ° C., particularly preferably 32 ° C.
- the mild low temperature transcription control element of the present invention acts as a mild low temperature specific enhancer for gene transcription.
- the light low-temperature transcription control element of the present invention can exert its function even when used alone, but it is preferable to use 2 to 350, preferably 200 to 100, of the same or different sequences.
- the same or different nucleotide sequences may be directly linked to each other, but may be connected via any kind and number of nucleotide residues between the sequences.
- a combination of light low temperature transfer control elements is referred to herein as “light low temperature transfer control enhancer” or simply “enhancer”.
- the light low temperature transfer control enhancer of the present invention is a light low temperature transfer control element that is connected to the 3 side of the t, nucleotide sequence: ccccgcc ccccgtc ⁇ ccccgct ⁇ 7 ccccgaa; on the 3rd side of the g Subsequent nucleotide sequence: ccccgcc; nucleotide sequence ccccgcc following the 3, side of a, ggcgggg preceding the a at the end, or those containing only ggggggg are excluded.
- the light cold transcription control element and the light cold transcription control enhancer of the present invention are independent of the distance and direction from the promoter.
- “mild low temperature transcription factor (protein) J” means 4/1
- the present invention also relates to a vector comprising the mild low temperature transcription control element or the mild low temperature transcription control enhancer described above.
- the present invention also relates to a eukaryotic cell transformed with the vector.
- the invention also relates to a eukaryote transformed with the vector.
- the low-temperature transcription control enhancer can be stably integrated into the cell chromosome.
- the present invention also relates to a mild low temperature transcription control factor and an assay method for the control substance.
- the method involves contacting a double-stranded DNA probe containing a light cold transcription control element with a protein solution to be targeted and binding the amount of the light cold transcription regulator specifically bound to the light cold transcription control element. Measurement by detecting a double stranded DNA probe. Regulator activity is assessed by quantifying changes in the amount of mild low temperature transcription factors that bind to the DNA probe.
- the present invention also relates to a method for purifying a mild low-temperature transcription factor.
- the method involves contacting a double-stranded DNA probe containing a mild low temperature transcription control element with a protein solution to obtain a mild low temperature transcription factor (protein) that specifically binds to the light low temperature transcription control element, and then the mild low temperature transcription factor. Isolating the transcriptional regulator.
- protein protein
- gene transcription can be promoted at a light low temperature.
- a mild low-temperature transcription factor (protein) and its regulatory substance can be identified or purified.
- FIG. 1 is a schematic diagram showing a pCAT3 promoter vector.
- MCS represents the cloning site
- SV40 promoter represents the SV40 virus-derived promoter
- CAT represents the chloramphee-cholase transferase coding sequence
- PA represents the SV40 virus-derived polyaduration signal
- FIG. 2 is a schematic diagram showing a pcDNA3.1 (+) vector (Invitrogen).
- MCS represents a multi-cloning site.
- the firefly luciferase coding sequence is inserted between EcoRV and Xba I of this multicloning site, and lightly placed 5 'to the CMV promoter. 6
- N e o r represents the G 4 18 resistance gene.
- FIG. 3 Nuclear protein of mouse B a 1 b / 3 T 3 cells cultured at 37 ° C (1 lane) or 32 ° C (2 lanes) for 8 hours with 3 2 P-ATP Using the labeled 5, -ttccccgccgacggatccag-3 'as a probe, we performed a genore shift assembly to detect a mild low-temperature transcriptional regulatory factor that binds to the low-temperature transcriptional control element.
- Examples of light low temperature transcription control elements include but are not limited to ccccgcc, ccccgca, ccccgcg, ccccgct ⁇ ccccgtcgt ccccgta ccccgtg, ccccgtt ⁇ ccccgac, ccccgaa, ccccgag, ccccggt ccccggc cccccg ⁇ cccccct ⁇ ccccctc, cccccta ⁇ ccccctg ⁇ ccccctt N ccccac N ccccaa cccccsg ⁇ ccccccgc, ccccga, cccccgg, cccccgt ⁇ ccccacc, ccccaca
- the mild low-temperature transcription control element and the low-temperature transcription control enhancer are four solid-phase synthesis methods using phosphoramidites using four types of deoxyliponucleotides with protecting groups, and solid-phase synthesis methods using hydrogen phosphonates.
- O l igonucleotide Synthesis A Practical Approach, IRL Press, 35-81,83-115 (1984); J. Org. Chem., 49,2139 (1984); Tetrahedron Lett., 27,469 (1986); Tetrahedron Let t., 22 , 1859-1862; Tetrahedron Lett., 21, 719-722 (1980); J. Am. Chem. Soc, 103,318 5-3191 (1981)).
- prokaryotic, eukaryotic, and viral promoters can be used as the promoter.
- Mammalian promoters and viral promoters are preferred.
- preferred plug motors include, but are not limited to, mouse thymidine kinase (TK), cytomegalovirus (CMV), SV40 promoter.
- RNA that does not encode a protein
- the light cold transcription control element or light cold transcription control element of the present invention, a promoter, and a coding sequence encoding a protein to be expressed or a target sequence not encoding a protein are ligated and inserted into a vector.
- the vector is a vector for expression of prokaryotic cells and eukaryotic cells.
- examples of preferred vectors include, but are not limited to, pCMV (Invitrogen), pCAT3 promoter vector (Promega), pSV2-Neovector.
- Transfect host cells with the vector It is preferred to use eukaryotic cells as host cells, especially mammalian cells.
- eukaryotic cells are human cell lines 293, 293T, U-2 OS, Huh-7, HeLa, monkey cell lines COS-7, Vero, etc., mouse cell lines NIH / 3T3, Balb / 3T3. , B-6, Hepal-6, Chinese nomstar cell line CHO, etc.
- Examples of the transfer method include a calcium phosphate method, a lipofussion method, a retrovirus method, and an electroporation method.
- a calcium phosphate method DN Add a drop of salt-calcium solution containing A (vector) with stirring.
- DNA—calcium phosphate can be finely precipitated.
- this solution is applied to the host cell, the DNA-calcium phosphate precipitate is taken into the host cell by phagocytosis, resulting in DNA being taken into the cell. It will be.
- Host cells are cultured at mild low temperatures. It is not necessary to use a special medium, and a medium usually used for each cell may be used.
- An example of a typical medium for mammalian cell culture is Dulbecco's Modified Eagle Medium (D-MEM) (Invitrogen) supplemented with 10% ushi fetal serum (FCS).
- D-MEM Dulbecco's Modified Eagle Medium
- FCS 10% ushi fetal serum
- the present invention also relates to a mild low temperature transcription factor (protein) and an assay method for the regulator.
- the method involves contacting a double-stranded DNA probe containing a light cold transcription control element with a protein solution to be assayed and binding the amount of light cold transcription regulator specifically bound to the light cold transcription control element. And measuring by detecting the double-stranded DNA probe. The activity of the regulator is assessed by quantifying the change in the amount of mild cold transcription regulators that bind to the DNA probe.
- a DNA oligonucleotide containing a light low temperature transcription control element and its complementary strand are prepared according to a standard method.
- the ends of the prepared oligonucleotides are labeled with, for example, piotin and annealed to form double strands.
- the oligonucleotide can be double-stranded and force-labeled, or unlabeled and finally detected as double-stranded.
- EMSA gel shift assembly
- a double-stranded oligonucleotide and a mild low-temperature transcription regulator are mixed with a protein solution, such as a nuclear extract, which may contain the regulator, and the double-stranded oligonucleotide and a mild low-temperature transcription regulator. And react.
- a protein solution such as a nuclear extract, which may contain the regulator
- the double-stranded oligonucleotide and a mild low-temperature transcription regulator are mixed with a protein solution, such as a nuclear extract, which may contain the regulator, and the double-stranded oligonucleotide and a mild low-temperature transcription regulator. And react.
- the oligonucleotide, the protein, and the combination of both are separated by gel electrophoresis, for example, polyacrylamide gel electrophoresis. Free oligonucleotides flow faster and force the lower part. Protein-bound oligonucleotides flow slowly and appear in the upper part.
- the gonoctide is labeled with piotin
- the polyacrylamide gel is blotted onto a nylon membrane and cross-linked to the membrane using ultraviolet light.
- Piotin-labeled on membrane and peroxidase-labeled streptavidin are specifically bound to emit light by reaction with a chemiluminescent substrate, exposed to X-ray film, and detected.
- the oligonucleotide bound to the protein can be detected by reacting and electrophoresis with an unlabeled oligonucleotide, and staining the gel with a dye as it is.
- a mild low-temperature transcription factor is estimated from the amount of the oligonucleotide bound specifically to the protein. Furthermore, by quantifying the effect on the amount of this mild low-temperature transcription control factor, the activity of the control substance can be assessed.
- the present invention also relates to a method for purifying a mild low-temperature transcription factor.
- the method involves contacting a double-stranded DNA probe containing a light low temperature transcription control element with a protein solution to obtain a light low temperature transcription control factor that specifically binds to the light low temperature transcription control element, and then the light low temperature transcription control factor. Isolating.
- a DNA oligonucleotide containing a light low temperature transcription control element and its complementary strand are prepared according to a standard method.
- the prepared oligonucleotide is bound to a carrier and immobilized.
- oligonucleotides are piotinized and complementary strands are aligned to bind to avidinized magnetic beads as double strands.
- the solid-phased double-stranded oligonucleotide and a protein solution that is thought to contain a mild low-temperature transcription factor are mixed together, and the double-stranded oligonucleotide and Contact with mild low temperature transcription factor.
- a mild low-temperature transcription factor for example, a fraction obtained by dividing the size of a nuclear-extracted protein
- the double-stranded oligonucleotide and Contact with mild low temperature transcription factor is recovered, for example, using a magnetic bead as a carrier, and then with a magnet.
- the mild low temperature transcription factor is purified. If necessary, it can be further purified by gel electrophoresis or column chromatography. Amino acid sequence and gene of mild low-temperature transcription factor can be identified from purified protein
- CAT3 promoter vector was used as a negative control.
- Each 2.5 to 5.0 ⁇ g Z35mm dish of these plasmids was a CDM8-LacZ (j8-galatatosidase expression vector, used to correct the efficiency of each transfection. ATCC) Cotransformation was performed on human cell line 293 cultured at 37 ° C for 1 day with 0.5-1.0 gZ35mm dishes.
- Transfected cells were divided into two, one was cultured at 32 ° C and the other at 37 ° C.
- the medium is D-MEM supplemented with 10% FCS.
- Example 1 since the first base in 8 bases was T, C, A, or G, it was not related to the activity, so tcccgcc, acccgcc, gcccgcc, ccccgct! , U; ⁇ ⁇ ⁇ ⁇ [J
- Each of the 5 'sides with T, C, A, or G connected in series by connecting 3 bases in series of 3 PCAT3 promoter as in Example 1 The results were shown in Table 2 after being incorporated into a multicloning site of a vector (Promega) and measuring the low-temperature transcription promoting activity.
- the transcription activity the value obtained by dividing the amount of CAT protein by / 3 galactosidase activity was used.
- a low temperature transcription control sensor can be prepared based on 7 bases instead of 8 bases, for example, ccccgcc.
- a mutant of the first base to T exhibits a low-temperature transcription promoting activity equivalent to that of the wild type. Mutant to A is slightly lower than wild type and exhibits low temperature transcription promoting activity, while mutant to G has low activity. Mutants of the 2nd, 3rd or 4th base to A, G and T are less active.
- the first base is mutated to 6.
- the sixth base is mutated to A, G, or T, and
- the first base is mutated to ⁇ .
- the seventh base is mutated to A, G, or T.
- the fifth base mutation to C, A, or T the sixth base to T, ⁇ , or G
- the mutation of 7 and the mutation of the 7th base to A, G, or T show significant activity, although the low-temperature transcription promoting activity is lower than that of the wild type.
- nucleotide sequence xlcccx5x6x7 (wherein xl represents c, t, or a, x5 represents g, c, a, or t, x6 represents c, t, a, or g) X7 represents c, a, g, 3; or t.)
- xlcccx5x6x7 (wherein xl represents c, t, or a, x5 represents g, c, a, or t, x6 represents c, t, a, or g)
- X7 represents c, a, g, 3; or t.)
- Base sequence activity Base sequence activity Shionogi ffi sequence activity Base sequence activity ccccgc 5. 0 ccccgcA 3-5 ccccgcG 1. 7 ccc cgcT 5.1 ccccgTc 4. 9 ccccgTA 3.6 ccccgTG 8, ccccgTT 4, 0 ccccgAc 4, 5 ccccgAG 2.2 cccgAT 3.0 ccccgGc 2.0 ccccgGA 2.
- Tcc cgTc 3 1 TcccgTA 2. 9 Tccc ⁇ TG 2.5 i cccgTT 2.4
- TcccgAc 1.
- I TcccgAA 2.5 TcccgAG 2, 0 TcccgAT 2.
- TcccgGc 2.0 TcccgGA I. 4 TcccgGG 1.5 TcccCcc 2.5
- TcccCcA 2.5 TcccCcG 2.9 TcccCcT 3 Tcc cCTc 2.2
- TcccCTA 2 2 TcccCTG 1. 9 TcccCTT ⁇ . 0 Tcc cCAc 1. 9
- TcccCAA 2. 0 TcccCAG 2. 0 TcccCAT 2.1 TcccCGc 1. 9
- TcccCGA 1. 3 TcccAcc 2. 1 TcccAcA 1.9 TcccAcG 2. 0
- TcccTcc L 6 TcccTcA 1.TcccTcG 1.1 Tcc cTcT 1, 1
- AcccCAA 1. 4 AcccCAG 1. 3 AcccCAT 1, 3 AcccCGc 1.2
- GcccTcc 1 2 GcccAcc 1.1 ggcgggg 4.5 4.5 agcgggg 4, 4 gacgggg 4.0 0 t tcgggg 3.9 ggggggg 2. 0 ggcggga 4.0 0 tgcggga 2. 1 gacggga 3.0 0 tggggga 1. 9 ggcgggt 3.0 Wild Type (c CCC SC C ) 5.0
- nucleotide sequence From negative control 'L 0 or more, nucleotide sequence: xlcccx5x6x7 (wherein xl is preferably c or t, but a may be used, x5 is preferably g, but c or a, and in some cases t may be used, x6 is preferably c, but may be a, or in some cases g, x7 is preferably c, but a or g Also good. ), And nucleotide sequences complementary to these sequences have low temperature transcription promoting activity.
- Example 5 From the results of Example 5, it is expected that a nucleotide sequence containing two ccccgcc is a mild low-temperature transcription control enhancer. Therefore, from the pGL3-basic vector (Promega) to the multicloning site (between EcoRV and Xbal) of the pcDNA3.1 (+) vector (Invitrogen) with cytomegalovirus (CMV) promoter (Fig. 2). Insert the excised firefly luciferase cDNA and place it on the 5th side of the CMV promoter.
- CMV cytomegalovirus
- this plasmid 5.0 ⁇ g Z60mm dish was transferred to the human cell line U-2 OS and cultured at 37 ° C in the presence of G418 (Invitrogen) for 3 weeks to stabilize the plasmid.
- G418 Invitrogen
- a cell clone that was integrated into the chromosome and expressed was obtained.
- the cultured cells were divided into two and both were cultured at 37 ° C for 2 days, then one was further cultured at 32 ° C and the other at 37 ° C.
- the medium is 10% FCS + D-MEM.
- 48 hours after the temperature change the cells were collected by centrifugation and a whole cell lysate was prepared. Firefly luciferase activity produced at each temperature was measured using the Dua Luciferase Reporter Assay kit (Promega). The results are shown in Table 6. The activity showed firefly luciferase activity per extracted protein.
- Mouse BalbZ3T3 fibroblasts were cultured in Dulbecco's Modified Eagle Medium (D-MEM) (Invitrogen) supplemented with 10% urine serum (CS) for 24 hours at 37 ° C. Cultivated at 37 ° C for another 8 hours, followed by conventional methods (John David Dignani, Russell M. Lebovitz, and Robert G. Roeder, Accurate transcription initiation by RNA polymerase II in a soluble extract from isolated mammalian nuclei. Nucleic Acids Res , 1983; 11: 1475-1489).
- D-MEM Dulbecco's Modified Eagle Medium
- CS urine serum
- Oligonucleotide, 5, ttccccgccgacggatccag—3, (Umi 5) was labeled with T4 polynuclotide kinase and gamma-32P-ATP, purified with a Sephadex G50 column (Amersham Bioscience), and then complemented. Annealing with the chain ctggatccgtcggcggaa (SEQ ID NO: 6) gave a probe of 5X105 cpm / ng.
- the present invention can be widely used for protein production.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CA002620136A CA2620136A1 (en) | 2005-09-05 | 2006-09-04 | Sequence capable of enhancing the expression of gene under moderately low temperature |
AU2006288394A AU2006288394A1 (en) | 2005-09-05 | 2006-09-04 | Sequence capable of enhancing the expression of gene under moderately low temperature |
EP06797375A EP1930425A4 (en) | 2005-09-05 | 2006-09-04 | SEQUENCE CAPABLE OF IMPROVING THE EXPRESSION OF A GENE AT A MODERATELY LOW TEMPERATURE |
US11/991,289 US20100143896A1 (en) | 2005-09-05 | 2006-09-04 | Sequence capable of enhancing the expression of gene under moderately low temperature |
JP2007534386A JPWO2007029641A1 (ja) | 2005-09-05 | 2006-09-04 | 軽度の低温により遺伝子の発現を促進させる配列 |
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JP2006157422 | 2006-06-06 | ||
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EP (1) | EP1930425A4 (ja) |
JP (1) | JPWO2007029641A1 (ja) |
KR (1) | KR20080041672A (ja) |
AU (1) | AU2006288394A1 (ja) |
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Citations (3)
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JP2001515087A (ja) * | 1997-08-18 | 2001-09-18 | ステファン ピッチ, | リボヌクレオシド−誘導体およびその製造方法 |
WO2005070946A1 (ja) * | 2004-01-27 | 2005-08-04 | Nippon Shinyaku Co., Ltd. | リボ核酸化合物及びオリゴ核酸化合物の液相合成法 |
WO2005090562A1 (ja) * | 2004-03-23 | 2005-09-29 | Jun Fujita | 軽度の低温により遺伝子の発現を促進させる配列 |
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US5846719A (en) * | 1994-10-13 | 1998-12-08 | Lynx Therapeutics, Inc. | Oligonucleotide tags for sorting and identification |
US6440705B1 (en) * | 1998-10-01 | 2002-08-27 | Vincent P. Stanton, Jr. | Method for analyzing polynucleotides |
CA2623245A1 (en) * | 2005-09-26 | 2007-04-05 | Wyeth | Amino-5- [4- (difluoromethoxy) phenyl] -5-phenylimidazolone compounds as inhibitors of the beta-secretase (bace) |
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2006
- 2006-09-04 KR KR1020087005152A patent/KR20080041672A/ko not_active Application Discontinuation
- 2006-09-04 AU AU2006288394A patent/AU2006288394A1/en not_active Abandoned
- 2006-09-04 WO PCT/JP2006/317452 patent/WO2007029641A1/ja active Application Filing
- 2006-09-04 EP EP06797375A patent/EP1930425A4/en not_active Withdrawn
- 2006-09-04 CA CA002620136A patent/CA2620136A1/en not_active Abandoned
- 2006-09-04 JP JP2007534386A patent/JPWO2007029641A1/ja active Pending
- 2006-09-04 US US11/991,289 patent/US20100143896A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001515087A (ja) * | 1997-08-18 | 2001-09-18 | ステファン ピッチ, | リボヌクレオシド−誘導体およびその製造方法 |
WO2005070946A1 (ja) * | 2004-01-27 | 2005-08-04 | Nippon Shinyaku Co., Ltd. | リボ核酸化合物及びオリゴ核酸化合物の液相合成法 |
WO2005090562A1 (ja) * | 2004-03-23 | 2005-09-29 | Jun Fujita | 軽度の低温により遺伝子の発現を促進させる配列 |
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SONNA L.A. ET AL.: "Invited review: Effects of heat and cold stress on mammalian gene expression", J. APPL. PHYSIOL., vol. 92, no. 4, 2002, pages 1725 - 1742, XP003009770 * |
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EP1930425A4 (en) | 2010-06-09 |
JPWO2007029641A1 (ja) | 2009-03-19 |
US20100143896A1 (en) | 2010-06-10 |
KR20080041672A (ko) | 2008-05-13 |
AU2006288394A1 (en) | 2007-03-15 |
EP1930425A1 (en) | 2008-06-11 |
CA2620136A1 (en) | 2007-03-15 |
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