WO2013115579A1 - TGF-β2 발현을 억제하는 shRNA - Google Patents
TGF-β2 발현을 억제하는 shRNA Download PDFInfo
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- C12N15/1136—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against growth factors, growth regulators, cytokines, lymphokines or hormones
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Definitions
- the present invention relates to shRNAs that inhibit TGF- ⁇ 2 expression and antitumor compositions comprising them.
- TGF- ⁇ 2 like TGF- ⁇ 1, inhibits the proliferation and differentiation of cytotoxic T cells, natural killer cells, and macrophages, thereby inhibiting immune search for growing tumors.
- TGF- ⁇ 2 is a multifunctional secretory protein that plays various roles such as proliferation suppression, replication, invasion, metastasis, apoptosis, immunoassay, and angiogenesis, depending on the type and timing of the cells, as well as TGF- ⁇ 2 like TGF- ⁇ 1.
- TGF- ⁇ 2 plays a role in further developing tumors when tumors develop in the late stages of tumor progression, resulting in resistance to TGF- ⁇ 2 proliferation inhibition due to inactivation of signal pathways or abnormal cell cycle regulation. Done.
- TGF- ⁇ 2 acts clearly differently from TGF- ⁇ 1 as follows.
- TGF- ⁇ 2 induces Foxp3 to significantly induce immunosuppression, and also affects tumor metastasis, neovascularization and proliferation, leading to tumor progression to malignancy.
- Non-Patent Document 2 (Chenyu Zhang et al, Transforming growth factor- ⁇ 2 is a molecular determinant for site-specific melanoma metastasis in the brain, Cancer Res. 2009 February 1; 69 (3): 828-35.)
- shRNA for ⁇ 2 was produced with TGCTGTTGACAGTGAGCGCGGTGTATAAATCGAGACCAAATTAGTGTGAAGCCACAGATGTATTTGGTCTCGATTTATACACCTTGCCCCTACTGCCTCGGA (target), and a lentiviral (lentivirus) that produces TGF- ⁇ 2 shRNA was also produced by chromosome incorporation. There is a big problem with the side effects are delivered.
- the present inventors have made efforts to solve the above problems, and as a result, by selecting a target that effectively induces silencing of human TGF- ⁇ 2 or mouse TGF- ⁇ 2 to produce shRNA, and mounted it in adenovirus
- the present invention has been completed by drastically improving the ability to deliver shRNAs by existing non-viral agents.
- an object of the present invention is to provide a shRNA that suppresses TGF- ⁇ 2 expression using a nucleotide sequence represented by SEQ ID NO: 1 or 2 as a target sequence.
- Another object of the present invention is to provide an anti-tumor composition containing the shRNA as an active ingredient.
- the present invention also has another object to provide a recombinant expression vector expressing the shRNA.
- the present invention also has another object to provide an anti-tumor composition comprising the recombinant expression vector as an active ingredient.
- Another object of the present invention is to provide an adenovirus into which the recombinant expression vector is introduced.
- the present invention as a means for solving the above problems
- an shRNA that suppresses TGF- ⁇ 2 expression is provided.
- the present invention is another means for solving the above problems
- the present invention is another means for solving the above problems
- the present invention is another means for solving the above problems
- composition comprising the recombinant expression vector as an active ingredient.
- the present invention is another means for solving the above problems
- It provides an adenovirus introduced with the recombinant expression vector.
- the present invention produced a novel shRNA that inhibits TGF- ⁇ 2 expression, and significantly increased specificity, delivery capacity and expression suppression ability compared to the prior art by increasing the infection rate using adenovirus as a gene carrier.
- the present invention provides an anti-tumor composition containing shRNA that inhibits TGF- ⁇ 2 expression.
- shRNA that inhibits TGF- ⁇ 2 expression.
- most cancer cells can be applied to all cancers by assigning a target to adenovirus having excellent delivery efficiency.
- 1 shows the pSP72 ⁇ E3 / si-negative vector, which is an E3 shuttle vector.
- FIG. 2 is a schematic diagram of the process of homologous recombination with the adenovirus backbone dl324 after subcloning (TGF- ⁇ 2 shRNA) into the shuttle vector.
- FIG. 3 shows screening results of E3 region PCR of adenoviruses
- (b) shows IX gene region PCR results of adenoviruses for selection of homologously recombined colonies in bacteria that are easily recombinant.
- (c) shows the result of the appearance of fragment DNA after PacI cleavage confirming whether transfection of homologously recombined adenovirus genomic DNA is possible.
- Figure 4 shows the final recombinant colonies screened in HindIII digestion pattern (digestion pattern).
- Figure 5 shows the results confirmed by the sequence analysis whether the selected colonies of Figure 4 has shRNA hTGF- ⁇ 2 nucleotide sequence.
- Figure 6 confirms the ability to inhibit TGF- ⁇ 2 expression by adenovirus expressing human TGF- ⁇ 2 shRNA of Example 2 by real-time PCR.
- Figure 7 confirms the ability to inhibit TGF- ⁇ 2 expression by adenovirus expressing the mouse TGF- ⁇ 2 shRNA of Example 2 by real-time PCR.
- Figure 8 confirms the inhibition of TGF- ⁇ 2 expression by the shuttle vector expressing the mouse TGF- ⁇ 2 shRNA of Example 2 by real-time PCR.
- Figure 9 confirms the ability to inhibit TGF- ⁇ 2 expression by adenovirus expressing human TGF- ⁇ 2 shRNA of Example 2 by ELISA.
- Figure 10 shows the pBSKII-3484 vector (a), pCA14-3484 vector (b), pCA14-CMV-3484 vector (c) and pCA14-CMV-3484- ⁇ E1B55 vector (d).
- Figure 11 is a schematic diagram showing the process of producing dl324-CMV-3484-shTGF- ⁇ 2 adenovirus from dl324 adenovirus.
- Figure 12 shows the homologous recombination process containing mouse shTGF- ⁇ 2, screening confirmed homologous recombination colonies by E3 screening (a), clones (1, 2, 4) homologous recombination by the HindIII cleavage pattern When screening and confirming (b), when the DNA of clones 1, 2 and 4 were cut with PacI, only clone 1 was correctly homologously recombined (c).
- C control, dl324- ⁇ E3-sh-mTGF ⁇ 2]
- S shuttle vector pCA14-CMV-3484- ⁇ E1B55
- 1-6 homologous recombined colony].
- Figure 13 shows the homologous recombination process containing human shTGF- ⁇ 2, screening confirmation homologous recombination colonies in the HindIII (digestion pattern) (a), final screening confirmation homologous recombination colonies after PacI cleavage (b) [C: control, dl324- ⁇ E3-sh-mTGF ⁇ 2], 1-3: homologous recombination colonies.
- Figure 14 will confirm cell hemolysis in cancer cells of the tumor selective replicable adenovirus of Example 4.
- Figure 15 compares the ability to inhibit hTGF- ⁇ 1,2,3 expression by adenovirus expressing human TGF- ⁇ 2 shRNA and adenovirus expressing human TGF- ⁇ 1 shRNA in real-time PCR results.
- FIG. 16 compares adenovirus expressing human TGF- ⁇ 2 shRNA with adenovirus expressing human TGF- ⁇ 1 shRNA and inhibits TGF- ⁇ 1,2,3 expression by ELISA results.
- RNA interference is a natural mechanism that selectively inhibits expression of target genes.
- Mediators of sequence specific mRNA degradation are small interfering RNAs of 19-23 nucleotides produced by cleavage of ribonuclease III from longer ds RNA.
- the cytoplasmic RNA-induced silencing complex directs the degradation of mRNA comprising a sequence that binds to a siRNA and is complementary to one strand of the siRNA.
- RISC cytoplasmic RNA-induced silencing complex
- siRNA interference in mammals has the efficacy of therapeutic gene silencing.
- siRNAs have limitations in clinical applications in that they must be prepared in vitro and knockdown genes are typically delivered by transient transfection for 6-10 days.
- the small-hairpin RNA (shRNA) expression system of the present invention can solve the aforementioned disadvantages.
- a shRNA is a molecule of about 20 bases or more that includes a double-stranded base sequence in single-stranded RNA, which has a double-stranded structure in the molecule and becomes a hairpin-like structure.
- the present invention relates to shRNA that inhibits TGF- ⁇ 2 expression, characterized in that the following sequence is used as a target sequence.
- Human target sequence 5'- GGATTGAGCTATATCAGATTCTCAA -3 '[SEQ ID NO: 2]
- shRNA that inhibits TGF- ⁇ 2 expression has a sequence complementary to a part of the TGF- ⁇ 2 gene, and may degrade or inhibit translation of the mRNA of the TGF- ⁇ 2 gene. Complementarity of 80-90% can inhibit the translation of mRNA, and 100% can degrade mRNA.
- the shRNA that inhibits TGF- ⁇ 2 expression is 80% or more, preferably 90% or more, to the 494-518 nucleotides of the mouse mRNA and the complementary sequence to the 578-602 nucleotides of the human mRNA. More preferably, it may include a base sequence having 100% homology.
- the mouse shRNA consists of the nucleotide sequence shown in SEQ ID NO: 1 (target sequence) and its complementary nucleotide sequence
- the human shRNA consists of the nucleotide sequence shown in SEQ ID NO: 2 (target sequence) and its complementary nucleotide sequence Can be.
- Each base sequence and its complementary base sequence may be linked palindrom by a loop region of 4 to 10 bp to form a hairpin structure.
- shRNAs of the invention may include the following sequences:
- ShRNA as the mouse target sequence of SEQ ID NO: 5'-GGATTGAACTGTATCAGATCCTTAA tctc TTAAGGATCTGATACAGTTCAATCC-3 '[SEQ ID NO: 3]
- shRNA short hairpin RNA
- shRNA short hairpin RNA
- RNAi The substance which inhibits the expression of TGF- ⁇ 2 by RNAi may be artificially chemically synthesized, and the DNA of the hairpin structure in which the DNA sequences of the sense strand and the antisense strand are connected in the reverse direction is subjected to laboratory conditions by T7 RNA polymerase.
- RNA may be synthesized in vitro.
- T7 RNA polymerase and T7 promoter can be used to synthesize antisense and sense RNA from template DNA. After annealing them in laboratory conditions, introduction into cells induces RNAi, leading to degradation of TGF- ⁇ 2 mRNA.
- Introduction into a cell can be performed by the method using the calcium phosphate method or various transfection reagents (for example, oligofectamine, lipofectamine, lipofection, etc.).
- an expression vector containing shRNA or DNA may be used, or a cell containing the expression vector may be used.
- the said expression vector and the kind of cell are not specifically limited, The expression vector and cell which are already used as a medicine are preferable.
- shRNA having a nucleotide sequence represented by SEQ ID NO: 1 or SEQ ID NO: 2 as a target sequence can be used.
- the present invention includes the recombinant expression vector for shRNA expression.
- the recombinant vector of the present invention can be constructed by recombinant DNA methods known in the art.
- Viruses (or viral vectors) useful for delivering shRNAs in the present invention include adenoviruses, retroviruses, lentiviruses, adenoviruses, and the like, and adenoviruses are preferred for reasons such as tumor induction.
- the following DNA can be prepared based on the shRNA sequence.
- non-viral vector useful for delivering shRNA in the present invention means all the vectors commonly used in gene therapy, except for the aforementioned viral vector, and examples thereof include various plasmids and liposomes that can be expressed in eukaryotic cells. .
- shRNA that inhibits TGF- ⁇ 2 expression is preferably operably linked to at least a promoter in order to be properly transcribed in the delivered cells.
- the promoter may be any promoter capable of functioning in eukaryotic cells, but the U6 promoter is particularly preferable for the advantage of producing small size RNA as RNA polymerase III.
- regulatory sequences including leader sequences, polyadenylation sequences, promoters, enhancers, upstream activation sequences, signal peptide sequences, and transcription terminators may be used as needed. It may also be included.
- operably linked means that the binding between nucleic acid sequences is functionally related.
- the case where any nucleic acid sequence is operably linked is when any nucleic acid sequence is positioned to be functionally related to another nucleic acid sequence.
- any transcriptional regulatory sequence affects the transcription of shRNA, said transcriptional regulatory sequence is said to be operably linked to the shRNA.
- the present invention comprises a shRNA that inhibits the expression of TGF- ⁇ 2 of SEQ ID NO: 3 or 4, a top strand represented by SEQ ID NO: 5, and a bottom strand represented by SEQ ID NO: 6
- a shRNA that inhibits the expression of TGF- ⁇ 2 of SEQ ID NO: 3 or 4
- a top strand represented by SEQ ID NO: 5 and a bottom strand represented by SEQ ID NO: 6
- An anti-tumor composition comprising DNA or a top strand represented by SEQ ID NO: 7 and a bottom strand represented by SEQ ID NO: 8 or a recombinant expression vector expressing the same as an active ingredient will be.
- the route of administration of the anti-tumor composition of the present invention is not particularly limited, and oral or parenteral administration (for example, intravenous administration, intramuscular administration, subcutaneous administration, intradermal administration, mucosal administration, rectal administration, vaginal administration, It may be administered by any one of the administration routes of topical administration, skin administration, etc. to a patient.
- oral or parenteral administration for example, intravenous administration, intramuscular administration, subcutaneous administration, intradermal administration, mucosal administration, rectal administration, vaginal administration, It may be administered by any one of the administration routes of topical administration, skin administration, etc. to a patient.
- the form of a formulation suitable for oral administration may be in the form of a solid or liquid, and the form of a suitable formulation for parenteral administration may be in the form of injections, drops, suppositories, external preparations, eye drops, nasal drops, and the like.
- the anti-tumor composition of the present invention may contain a pharmaceutically acceptable additive,
- pharmaceutically acceptable additives include, for example, excipients, binders, disintegrants, glidants, antioxidants, preservatives, stabilizers, tonicity agents, colorants, copulating agents, diluents, emulsifiers, suspending agents, solvents, fillers Extenders, buffers, delivery carriers, carriers, excipients and / or pharmaceutical adjuvants.
- an excipient is added to the active ingredient, and an additive for preparation such as a binder, a disintegrant, a lubricant, a colorant, or a copper is added, if necessary. Then, it can prepare as a tablet, a granule, a powder, a capsule in accordance with a conventional method.
- an anti-tumor composition of the present invention in the form of an oral liquid formulation, one or two or more additives for the preparation, such as a copulation agent, a stabilizer, or a preservative, are added to the active ingredient, and according to a conventional method, an oral solution agent and a syrup agent , Elixirs and the like can be prepared.
- aqueous or non-aqueous may be sufficient.
- Liquid formulations can be prepared by methods well known in the art.
- the injection can be prepared by dissolving in a solvent such as physiological saline, a buffer such as PBS, and sterile water, followed by filtration and sterilization with a filter paper or the like, followed by filling into a sterile container (for example, an ampoule).
- This injection may contain the usual pharmaceutical carrier as needed.
- the administration method using a non-invasive catheter may be used.
- the carrier that can be used in the present invention include neutral, buffered saline, or saline containing serum albumin.
- the method is not particularly limited as long as the shRNA or shRNA expression vector that inhibits TGF- ⁇ 2 expression is expressed in the cell to be applied. It is possible to use gene introduction using viral vectors, liposomes.
- a viral vector animal viruses, such as a retrovirus, a vaccinia virus, an adenovirus, and a sinrinseliki virus, are mentioned, for example.
- Substances that inhibit TGF- ⁇ 2 expression by RNAi may be injected directly into cells.
- the active ingredient of the anti-tumor composition of the present invention is used in a therapeutically effective amount, and the dosage of the composition is the purpose of use, the degree of addiction of the disease, the age, weight, sex, history, or type of substance used as the active ingredient. It can be determined by those skilled in the art in consideration of the above. For example, about 1 ⁇ 10 10 particles to 1 ⁇ 10 12 particles per kg of adult as an active ingredient.
- the frequency of administration of the anti-tumor composition of the present invention may be, for example, once a day to once a few months.
- the pharmaceutical compositions of the present invention can be used in various diseases or disorders associated with tumors, such as cancer, specifically brain cancer, gastric cancer, lung cancer, breast cancer, ovarian cancer, liver cancer, bronchial cancer, non-human It can be used for the prevention and treatment of head cancer, laryngeal cancer, esophageal cancer, pancreatic cancer, bladder cancer, prostate cancer, colon cancer, colon cancer and cervical cancer.
- treatment refers to (i) prevention of tumor cell formation; (ii) inhibiting a disease or condition associated with the tumor following removal of the tumor cells; And (iii) alleviation of a disease or disorder associated with a tumor following removal of tumor cells.
- therapeutically effective amount as used herein means an amount sufficient to achieve the above pharmacological effect.
- a shRNA based on sense 25 mer / antisense 25 mer (including a 4-base loop in the middle) is constructed and expressed in a shuttle vector for expression in adenovirus. Introduction and homologous recombination virus was made.
- a shRNA having an effect of inhibiting at least 75% of TGF- ⁇ 2 mRNA in mice at least 10 nM of TGF- ⁇ 2 shRNA was obtained through a real-time PCR method.
- mouse shRNA was transfected into skin cancer cells B16F10 and examined after 24 hours.
- the experimental method is as follows.
- the forward primer was 5'-GTGAATGGCTCTCCTTCGAC-3 '[SEQ ID NO: 9] and the reverse primer was 5'-CCTCGAGCTCTTCGCTTTTA-3' [SEQ ID NO: 10], and the reaction conditions were performed as follows. .
- Stage 1 Reverse transcription (42 ° C. 5 min, 95 ° C. 10 sec),
- Step 2 PCR reaction (95 °C 5 sec, 60 °C 20 sec) 50 cycles
- Step 3 The separation was carried out (60 ° C-> 95 ° C).
- the shRNAs having 25/25 +4 loops were synthesized with respect to the target sequences, and their inhibitory effects on the target sequences were confirmed by real-time PCR.
- Reverse primer 5'- ATATAAGCTCAGGACCCTGCTG-3 '[SEQ ID NO: 12]
- reaction conditions were 1 step: reverse transcription (42 ° C 5 min, 95 ° C 10 sec), 2 step: PCR reaction (95 ° C 5 sec, 60 ° C 20 sec) 50 cycles, 3 step: separation (60 ° C-> 95 ° C) Was carried out.
- Human target sequence 5'- GGATTGAGCTATATCAGATTCTCAA -3 '[SEQ ID NO: 2]
- the shRNAs having 25/25 +4 loops were synthesized with respect to the target sequences, and their inhibitory effects on the target sequences were confirmed by real-time PCR.
- ShRNA for human target sequence (SEQ ID NO: 2): 5'- GGATTGAGCTATATCAGATTCTCAA tctc TTGAGAATCTGATATAGCTCAATCC - 3 '[SEQ ID NO: 4]
- Example 2 Construction of non-replicating adenovirus vectors expressing shRNA against a target sequence
- oligonucleotide consisting of bases with BamHI and HindIII restriction enzyme sequences at both ends, with the sense and antisense sequences positioned between tctc or tctctc with the most effective inhibitory shRNA sequences identified by real-time RT-PCR. And oligonucleotides complementary to each other were synthesized and annealed, and then the adenovirus E3L (26591-28588) and E3R (30504-) were added to the pSP72 ⁇ E3 / si-negative vector (Fig. 1, pSP72 cloning vector (Promega)).
- the final recombinant was selected by the HindIII digestion pattern (Fig. 4).
- the dl324 / IX lanes are the dl324 backbones;
- the shuttle lane is pSP72-sh-hTGF- ⁇ 2.
- Lanes 1 to 10 show a result of amplifying the E3 region of a plasmid obtained from a bacterial clone after homologous recombination between the dl324 backbone and pSP72-sh-hTGF- ⁇ 2, and a band corresponding to about 2 kb is positive.
- lane dl324 / IX is the dl324 backbone;
- the shuttle vector is pSP72-hTGF- ⁇ 2. Homologous by PCR results of reselecting clones containing genomic DNA from among clones containing sh-hTGF- ⁇ 2 (# 1, 2, 5, 6, 7, 8, 9) identified in FIG. (A) of FIG. 3 confirming that the recombination was performed, which means that the positive clones on both sides were homologous recombination.
- PCR was performed on the IX gene region, homologous recombination was confirmed using the difference between the dl324 backbone having the IX gene and the shuttle vector having no IX gene. As a result, only # 1, 2, 6 and 7 were reselected.
- Figure 3 (c) is finally confirmed whether the homologous recombination according to the difference in the pattern when the cut (cut) the HindIII of the backbone and the sample.
- Lanes 1 to 3 are DNAs derived from the # 1 clone
- lanes 4 to 6 are clones # 2
- lanes 7 to 9 are DNAs obtained from a clone cell # 6 again in a competent cell called DH5a.
- Progeny clones obtained from the parental clones of each of the three DNA from the # 1 clone only showed a HindIII pattern different from the existing dl324-IX (leftmost first lane). This means that the backbone adenovirus DNA has homologous recombination with the shuttle vector, and therefore the present invention is based on the # 1 clone.
- the E3 shuttle vectors prepared by the above method were treated with Xmn I restriction enzymes to form single strands, and then treated with Spe I restriction enzymes and co-transfected with E. coli BJ5183 together with dl324, a non-replicable adenovirus. Conversion led to gene homologous recombination. Homologously recombined plasmid DNA was obtained and treated with Hind III restriction enzyme to confirm the change of DNA pattern, and finally sequenced to confirm homologous recombination. The identified plasmids were cut with Pac I and transformed into 293 cell lines. A nonreplicating adenovirus expressing shRNA TGF- ⁇ 2 was constructed.
- a shRNA When a shRNA is produced in a replicable adenovirus, an inhibitor of a shRNA and a cell lysis effect are mixed, so that only an inhibitory effect is difficult to be clearly identified.
- the adenovirus was grown in 293 cell lines and concentrated to CsCl gradients to determine the titer of the virus by limiting dilution or plaque assay.
- the final virus titer was 2.5 ⁇ 10 9 pfu / ml by limiting dilution titration.
- TGF- ⁇ 2 Expression inhibition was confirmed in humans, DU-145, a human prostate cancer cell, infected with adenovirus 1 to 100 moi of Example 2, and after 2 days, the cells were lysed with Trizol and chloroform TGF- ⁇ 2 after harvesting RNA by continuously treating with isopropanol, ethanol, etc. The degree of mRNA expression inhibition was confirmed by real-time PCR.
- mice B16F10, a mouse melanoma cell, was infected with the adenovirus 100, 500, and 1000 moi of Example 2, and the procedure thereafter was carried out in the same manner as in humans.
- RNA-to-Ct 1step kit 0.2 ⁇ l RT enzyme mix (125X), 12.5 ⁇ l RT-PCR Mix (2x), 0.5 ⁇ l Forward Primer (100 pM), 0.5 ⁇ l reverse primer (100 pM), RNA (10ng) / ⁇ l) 5 ⁇ l, Nuclease-free water 6.3 ⁇ l total volume was 25 ⁇ l, the reaction conditions are shown in Table 3.
- RNA-to-Ct 1step kit 0.2 ⁇ l RT enzyme mix (125X), 12.5 ⁇ l RT-PCR Mix (2x), 0.5 ⁇ l Forward Primer (100 pM), 0.5 ⁇ l reverse primer (100 pM), RNA (10ng) / ⁇ l) 5 ⁇ l, Nuclease-free water 6.3 ⁇ l total volume was 25 ⁇ l, the reaction conditions are shown in Table 3.
- TGF- ⁇ 2 secreted in serum-free medium was measured in the last 24 hours while incubating in the prostate cancer cells of human Example 2 for 2 days after the adenovirus 1, 5, 10, 50 moi infection.
- an adenovirus was produced that expresses this shRNA and selectively kills cells.
- various enzyme sites include E1A and E1B55kDa genes in the pBSKII plasmid [Stratagene, USA].
- PBSKII-3484 synthetic gene was prepared including [FIG. 10 (a)].
- pBSKII-3484 was PCR-treated with restriction enzymes using Fsp I and then blunt end with a blunting enzyme. was prepared and treated with Bam HI again.
- pCA14 [Microbix BiosystemsInc, Canada] was Ssp were cut using a restriction enzyme to I, create a blunt end using a block reonting enzyme, which processes the Bgl II same transmission restriction enzyme (Isoschizomer) Bam HI and Bgl II and ends
- a shuttle vector pCA14-3484 was constructed by inserting the synthesized gene through the blunt end of [Fig. 10 (b)].
- the shuttle vector pCA14-CMV-3484- ⁇ E1B55 was cut and linearized by XmnI, and then dl324-BstBI-human shTGF- ⁇ 2 (or mouse shTGF- ⁇ 2) without IX gene was cut with BstBI and transformed simultaneously in E. coli BJ5183. Recombination was induced.
- Homologously recombined plasmid DNA was obtained and treated with Hind III restriction enzyme to confirm the change of DNA pattern, and finally sequenced to confirm homologous recombination.
- the identified plasmids were cut with Pac I and transformed into 293 cell lines.
- a dl324-CMV-3484-shTGF- ⁇ 2 adenovirus was produced that selectively killed tumors and inhibited the expression of human (or mouse) TGF- ⁇ 2 (FIG. 11).
- Figure 12 shows the homologous recombination process for the production of tumor-selective replicable adenovirus containing the actual mouse shTGF- ⁇ 2, as a result of E3 screening, 1, 2, 4, 5, 6 clones were first selected as a positive clone ( a), the homologous recombination colonies were selected by the HindIII digestion pattern, and colonies 1, 2, and 4 were compared with the control, and confirmed to be recombinant (b), 1, 2, and 4 colonies after PacI cleavage.
- Figure 13 shows the homologous recombination process for the production of tumor-selective replicable adenovirus containing human shTGF- ⁇ 2, clones (1, 2, 3) homologous recombination by the HindIII cleavage pattern was selected (a), When the DNAs of the clones 1, 2 and 3 were cut with PacI, the clone DNAs 1,2 and 3 were all cut and confirmed to have a band of about 2 kb, which is dl324-CMV- in which the DNA of the 1,2,3 colonies was homologously recombined. DNA of 3484- ⁇ E1B55- ⁇ E3-sh-hTGF- ⁇ 2 was confirmed (b).
- each cell was sorted according to the size of the cells from 4 ⁇ 10 4 to 1 ⁇ 10 5 in a 24-well plate, and then divided and cultured. The next day, the cloned adenovirus with the survivin promoter and CMV promoter was infected by MOI, and when the cells were all killed by the virus at the lowest MOI in the positive control 293A cell line, the experiment was terminated. Stained with. The cells were fixed with 3.7% paraformaldehyde at room temperature for 5 minutes and then stained with 0.05% crystal violet for 30 minutes at room temperature and washed with water to observe the stained cells. As a result of comparing the tumor killing effect of the virus with two types of tumor killing viruses, the difference in killing effect according to the promoter was not significant and both showed excellent tumor selectivity.
- FIG. 14 shows tumor-selective replicable adenoviruses (dl324-CMV-3484 and surviving promoter not expressing CMV promoter and E1B 55KDa and dl324-hSurvivin-3484 expressing 55KDa) are normal cells (BJ cells). In Esau, cloning does not occur, whereas cloning occurs in various types of human cancer cells, demonstrating that cell hemolysis occurs.
- TGF- ⁇ 1 present in cells after infection with non-replicating adenovirus of Example 2 expressing human sh-TGF- ⁇ 1 or sh-TGF- ⁇ 2 in an A375 melanoma cell line with 1, 5, 10, 50, 100 moi , TGF- ⁇ 2, TGF- ⁇ 3 mRNA levels were performed by real-time PCR method.
- TGF- ⁇ 1 shRNA decreased intracellular TGF- ⁇ 1 mRNA but increased TGF- ⁇ 2 mRNA or TGF- ⁇ 3 mRNA.
- TGF- ⁇ 2 shRNA was found to reduce TGF- ⁇ 2 mRNA or TGF- ⁇ 3 mRNA simultaneously while effectively reducing intracellular TGF- ⁇ 2 mRNA [FIG. 15]. This is an advantage that the reduction in efficacy due to the compensation effect in the cell at least when expressing the TGF- ⁇ 2 shRNA not only does not exhibit this phenomenon but also has the side effect of inhibiting other isotype of TGF- ⁇ . Similar results showed that the expression pattern of the reduced expression of TGF- ⁇ protein using ELISA was similar to that of real-time PCR [FIG. 16].
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- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Abstract
Description
Claims (10)
- 서열번호 1 또는 2로 표시되는 염기서열을 표적서열로 하고, TGF-β2 발현을 억제하는 shRNA.
- 제 1 항에 있어서,서열번호 3 또는 서열번호 4로 표시되는 shRNA.
- 제 1 항의 shRNA를 유효성분으로 함유하는 항종양 조성물.
- 제 1 항의 shRNA 발현하는 재조합 발현벡터.
- 제 4 항에 있어서,서열번호 5로 표시되는 탑 스트랜드(top strand)와, 서열번호 6으로 표시되는 바텀 스트랜드(bottom strand)를 포함하는 DNA를 포함하는 재조합 발현벡터.
- 제 4 항에 있어서,서열번호 7로 표시되는 탑 스트랜드(top strand)와, 서열번호 8로 표시되는 바텀 스트랜드(bottom strand)를 포함하는 DNA를 포함하는 재조합 발현벡터.
- 제 4 항에 있어서,U6 프로모터를 함유하는 벡터에 DNA를 재조합시켜 수득하는 재조합 발현벡터.
- 제 4 항에 있어서,pSP72△E3-sh-human TGF-β2 또는 pSP72△E3-sh-mouse TGF-β2인 재조합 발현벡터.
- 제 4 항의 재조합 발현벡터를 유효성분으로 하는 항종양 조성물.
- 제 4 항의 재조합 발현벡터를 도입한 아데노바이러스.
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JP2014555484A JP2015506696A (ja) | 2012-01-31 | 2013-01-31 | TGF−β2発現を抑制するshRNA |
CN201380007620.1A CN104245936B (zh) | 2012-01-31 | 2013-01-31 | 用于抑制TGF-β2表达的shRNA |
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KR10-2012-0009811 | 2012-01-31 | ||
KR20120009811 | 2012-01-31 | ||
KR1020130010233A KR101420564B1 (ko) | 2012-01-31 | 2013-01-30 | TGF-β2 발현을 억제하는 shRNA |
KR10-2013-0010233 | 2013-01-30 |
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WO2013115579A1 true WO2013115579A1 (ko) | 2013-08-08 |
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PCT/KR2013/000791 WO2013115579A1 (ko) | 2012-01-31 | 2013-01-31 | TGF-β2 발현을 억제하는 shRNA |
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Cited By (1)
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US20210154329A1 (en) * | 2015-12-08 | 2021-05-27 | University-Industry Foundation, Yonsei University | ANTI-TUMOR COMPOSITION COMPRISING GM-CSF GENE, Flt3L-TRAIL FUSION GENE, shRNA INHIBITING TGF-ß EXPRESSION, AND shRNA INHIBITING HSP EXPRESSION |
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KR20100066429A (ko) * | 2007-06-20 | 2010-06-17 | 독립행정법인 산업기술종합연구소 | 모르탈린 siRNA를 포함하는 암치료제 |
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US20210154329A1 (en) * | 2015-12-08 | 2021-05-27 | University-Industry Foundation, Yonsei University | ANTI-TUMOR COMPOSITION COMPRISING GM-CSF GENE, Flt3L-TRAIL FUSION GENE, shRNA INHIBITING TGF-ß EXPRESSION, AND shRNA INHIBITING HSP EXPRESSION |
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