WO1993020228A1 - Novel, physiologically active protein and hemopoietic stem cell growth promoter - Google Patents
Novel, physiologically active protein and hemopoietic stem cell growth promoter Download PDFInfo
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- WO1993020228A1 WO1993020228A1 PCT/JP1993/000404 JP9300404W WO9320228A1 WO 1993020228 A1 WO1993020228 A1 WO 1993020228A1 JP 9300404 W JP9300404 W JP 9300404W WO 9320228 A1 WO9320228 A1 WO 9320228A1
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- amino acid
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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
- C07K14/475—Growth factors; Growth regulators
-
- 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 a novel physiologically active protein having an activity of proliferating undifferentiated hematopoietic stem cells, and an agent for increasing hematopoietic stem cells containing the protein as an active ingredient.
- hematopoietic factors interact at various levels during the differentiation process from undifferentiated hematopoietic stem cells to mature blood cells, forming a complex hematopoietic network.
- most of these hematopoietic factors have been subjected to gene cloning, and some hematopoietic factors are currently being mass-produced by genetic recombination technology, and clinical applications are being promoted.
- undifferentiated hematopoietic stem cells are characterized by having the ability to self-renew (proliferate), but the growth factors acting on undifferentiated hematopoietic stem cells in the bone marrow have not been fully elucidated.
- bone marrow stromal cells play a central role in the proliferation of hematopoietic stem cells and differentiation into mature cells in the bone marrow, and some humoral factors secreted by stromal cells or cell-cell interactions are known. It is thought to be involved in the proliferation of undifferentiated hematopoietic stem cells.
- -Hematopoietic factors that support the growth of undifferentiated hematopoietic stem cells are therapeutic agents for bone marrow suppression, such as recovery of bone marrow suppression in cancer chemotherapy and bone marrow transplantation, or bone marrow function such as aplastic anemia and myelodysplastic syndrome.
- a therapeutic agent for insufficiency it is also a useful drug, such as being used as an initro-proliferating agent for peripheral blood stem cells and bone marrow stem cells in bone marrow transplantation treatment.
- the present invention provides a novel protein having the activity of proliferating undifferentiated hematopoietic stem cells, and using the same as an active ingredient to treat bone marrow suppression, treat bone marrow dysfunction, or obtain peripheral blood stem cells and bone marrow stem cells. It is an object of the present invention to provide a hematopoietic stem cell-enhancing agent used for in vitro propagation of E. coli.
- Bone marrow stromal cells are composed of fibroblasts, Z preadipocytes, endothelial cells, and macrophages. Interleukin 1, interleukin 6, interleukin 7, interleukin 8, interleukin 11 , C-kit ligand, LIF leukemiainhibitory factor), GM-CSF, G-CSF, M-CSF, and the like. It was considered that a growth factor for undifferentiated hematopoietic stem cells was present in the culture of blast cells.
- Hematopoietic cells obtained from the bone marrow of mice treated with high doses of 5-fluorouracil (5FU) were used to form pre-spleen colony forming cells. It is called vesicle (pre-CFU-S) and is known to be an undifferentiated hematopoietic stem cell with high self-renewal ability.
- pre-CFU-S vesicle
- the present inventors have conducted intensive studies for the purpose of separating a novel bioactive protein from a culture of fibroblasts, using the proliferation activity on 5-FU resistant mouse bone marrow cells as an index. As a result, a novel physiologically active protein having a proliferative activity of undifferentiated hematopoietic stem cells was separated, and the present invention was completed.
- the present invention provides an N-terminal amino acid sequence represented by SEQ ID NO: 1 having an activity of supporting the proliferation of undifferentiated hematopoietic stem cells and having a molecular weight of 18,000 ⁇ 2,000.
- a novel bioactive protein having Further, the physiologically active protein of the present invention has the amino acid composition shown in Table 1.
- the physiologically active protein of the present invention is a protein consisting of the amino acid sequence from the 1st to the 162nd amino acid of the amino acid sequence shown in SEQ ID NO: 5 in the sequence listing, Protein consisting of amino acid sequences from 1 to 16; protein consisting of amino acid sequences from 1 to 16; protein consisting of amino acid sequences from 1 to 16 A protein consisting of the amino acid sequence from 1 to 166, a protein consisting of the amino acid sequence from 1 to 167, and a protein consisting of the amino acid sequence from 1 to 168 Protein, or from the first 1 8 8 It is a protein consisting of up to amino acid sequences. BRIEF DESCRIPTION OF THE FIGURES
- Fig. 1 shows a schematic diagram of the restriction fragment of fipronectin by thermolysin and the domain for recognition of each monoclonal antibody
- Fig. 2 shows the method of constructing the expression vector pSRaFN14. It is shown.
- the bioactive protein of the present invention belongs to a novel hematopoietic factor based on its N-terminal amino acid sequence and amino acid composition.
- the amino acid sequence of the physiologically active protein of the present invention is a part of fibronectin.
- Fibronectin is known to enhance erythropoietin-induced erythroid cell proliferation (Weinsteon, R., eta 1, Blood, 73, 111 (1 989)).
- the enhancement was inhibited by the tetrapeptide of Arg-Gly-Asp-Se r (RGDS), indicating that the portion of the fibronectin where the RGDS sequence was present was responsible for this enhancement.
- RGDS sequence does not exist in the bioactive protein of the present invention, it belongs to a novel hematopoietic factor different from this finding.
- the biologically active protein can be used for the expansion of hematopoietic stem cells in an evaluation system using mouse bone marrow cells.
- a novel hematopoietic stem cell-increasing agent comprising the bioactive protein as an active ingredient was completed.
- a culture of human fibroblasts is usually used. That is, human fibroblasts are cultured in a medium containing bovine serum, and after reaching a certain number of cells, the medium is replaced with a serum-free medium to produce the protein.
- the obtained culture solution is used for silica chromatography, heparin affinity chromatography, anion exchange chromatography, metal chelate chromatography, gel filtration chromatography, hydroxyapatite chromatography, etc.
- the product can be purified by using to obtain a pure product.
- fibronectin is degraded with a protease such as thermolin or trypsin, and a fragment containing the amino acid sequence of the present invention can be obtained by the method described above.
- the physiologically active substance (FDF-3) of the present invention can be obtained stably and in large quantities by recombinant DNA technology. That is, a polypeptide of human FDF-3 was synthesized from a cDNA library prepared from human fibroblast mRNA using a polynucleotide synthesized based on the amino acid of FDF-3 as a probe. CDNA containing the nucleotide sequence encoding the DNA can be obtained. Further, since FDF-3 of the present invention is a fragment of fibronectin, two types of primers based on the 5′-terminal and 3′-terminal nucleotide sequences of fibronectin corresponding to the polypeptide of FDF-3 are used in a DNA synthesizer.
- cDNA of FDF-3 can be obtained.
- the cDNA thus obtained is inserted into various expression vectors, the transformant transformed with the recombinant expression vector is cultured, and recombinant human FDF-3 is collected from the culture.
- the vector used to express FDF-3 has a DNA fragment encoding a part or all of the amino acid sequence of FDF-3 polypeptide downstream of the promoter.
- Various promoters have been reported as promoters.
- promoters that can be expressed in animal cells such as promoters for SV40, are desirable. Downstream of this promoter is a signal-like sequence contained in the secretory protein gene, and a DNA fragment of the FDF-3 gene is inserted downstream of the promoter in the direction of transcription.
- the structural gene portion of the gene used for the signal sequence may be included.
- a site sequence such as interleukin-16 can be used as a secretory protein signal sequence.
- a polyA addition signal be present downstream of the FDF-3 gene.
- a poly A additional signal for example, SV 40 DN ⁇ , ⁇ Poly-A addition signal of one globin gene or mecrothionin gene can be used.
- animal cells for example, C0S-1 cell CHO cells can be transformed.
- the expression vector can be introduced into animal cells using a calcium phosphate coprecipitation method, a DAE dextran method, an electric pulse method, a microjection method, or the like.
- the transformed animal cells can be cultured as described above, and the culture can be purified by various mouth chromatography methods.
- Proliferate in bone marrow cells of 5-FU treated mice with IL-3, G-CSF or stem self-actor, or IL-13 with G-CSF Shows activity. It also exhibits proliferative activity on human cord blood monocytes when used in combination with GM-CSF.
- the bioactive protein (FDF-3) of the present invention exhibits a proliferative activity on undivided hematopoietic stem cells, and is an effective hematopoietic stem cell-enhancing agent for treating bone marrow suppression (for example, after use of anticancer drugs or bone marrow transplantation).
- a hematopoietic stem cell augmentation agent effective for the treatment of bone marrow dysfunction (eg, regenerative anemia or myelodysplastic syndrome), or hematopoiesis effective for the proliferation of peripheral blood stem cells and bone marrow stem cells in vitro It is useful as an agent for increasing stem cells.
- the FDF-3 of the present invention works particularly with IL-3 and stimulates the formation of blast colonies, which are undifferentiated blood cells, and is therefore useful as an agent for increasing hematopoietic stem cells.
- FDF-3 works synergistically with SCF, G-CSF, GM-CSF, and IL-13 to significantly stimulate colony formation in mammalian bone marrow cells, such as mice treated with 5-fluorouracil (5-FU) Therefore, it can be used as an enhancer of bone marrow recovery in the treatment of bone marrow aplasia and myelosuppression caused by the administration of chemotherapeutic drugs (5-FU).
- 5-FU chemotherapeutic drugs
- FDF-3 of the present invention stimulates the formation of megakaryocyte colonies (CFU-Meg), it is thought to increase the production of platelets released from megakaryocytes, and therefore, is used as a platelet-increasing agent. Is also useful.
- FDF-3 works synergistically with SCF, G-CSF, GM-SCF, and IL-3 to increase leukocytes such as neutrophils (CFU-G), thus reducing leukopenia in mammals. It is also effective as a therapeutic agent.
- physiologically active protein of the present invention when used in the above-mentioned use of the present invention, it may be orally administered as a pharmaceutical composition as it is or mixed with a known pharmacologically acceptable carrier, excipient or the like. Or it can be administered parenterally.
- Specific dosage forms for oral administration include tablets, pills, capsules, granules, syrups, emulsions, suspensions and the like.
- Such a dosage form is produced by a method known per se and contains a carrier or excipient usually used in the field of formulation.
- carriers and excipients for tablets include lactose, starch, sucrose, magnesium stearate, and the like.
- Dosage forms for parenteral administration include, for example, ointments, injections, poultices, liniments, inhalants, suppositories, transdermal absorbents and the like.
- Injections can be prepared by a method known per se, for example, a sterile aqueous solution of the protein of the present invention usually used for injections. It is prepared by dissolving, suspending or emulsifying in an oily liquid. Examples of the aqueous solution for injection include physiological saline and glucose solution, and examples of the oily liquid include sesame oil and soybean oil.
- Suppositories to be used for enteral administration are prepared by a method known per se, for example, by mixing the protein of the present invention with an ordinary suppository base and molding.
- the effective dose and frequency of administration of the protein of the present invention will vary with the form of administration, the age and weight of the patient, the nature of the condition to be treated or the severity of the condition to be treated. 0 1 to: LOO mg, preferably 0.1 to 10 mg can be administered once or in several divided doses.
- human fibroblasts are cultured with 10% FBS-MEM medium—0.3% beads (Cytodex—1: manufactured by Pharmacia) at 37 ° C. for 5 days with stirring. Was done. After growth reached confluence, the medium was switched to MEM medium, poly-iZClOugZml was added, induction was applied, and protein production was induced. Culture was continued at 37 ° C for 4 days, and 20 L of the culture solution was collected.
- This solution was adsorbed to a heparin sepharose column (0.5 L carrier, manufactured by Pharmacia) equilibrated with 2 O mM Tris-HCl buffer (pH 8.0), and then used for equilibration. Washed with buffer. The unadsorbed fraction and the washing solution are combined and adsorbed on a DE AE cell opening fin column (0.5 L carrier: manufactured by Seikagaku) equilibrated with 20 mM Tris-HCl buffer (pH 8.0). Washed with equilibration buffer. Next, the protein was eluted with a linear gradient of NaCl from OM to 1M.
- the obtained active fraction 250 ml was equilibrated with a 0.5 mM NaCl-containing 20 mM Tris-HCl buffer (pH 8.0) and a Zn-chelate Sepharose column (carrier 30) was equilibrated. ml: Pharmacia) and washed with an equilibration buffer. After removing impurity proteins with 20 mM Tris-HCl buffer (pH 8.0) containing 1 M NH 4 C 1, 0 to 50 mM imidazole (containing 0.5 M Na C 1) Elution was carried out with 20 mM Tris-HCl buffer, pH 8.0).
- Sephacryl S100 HR column (carrier) was obtained by equilibrating the obtained active fraction (20 ml) with 20 mM Tris-HCl buffer (pH 8.0) containing 0.5 M NaC1. (1 L: manufactured by Pharmacia). 20 ml of the active fraction was adsorbed to 0.5 M NaC1 and washed with equilibration buffer, then 0 to 50 mM imidazole 0.5 M NaC1 in 20 mM Ris hydrochloric acid buffer, PH 8.0).
- the activity peak was subjected to SDS-PAGE under non-reducing conditions. As a result, a single band having a molecular weight of 18,800 ⁇ 2,000 was shown.
- N-terminal amino acid sequence and amino acid composition N-terminal amino acid sequence and amino acid composition:
- the amino acid sequence at the N-terminal 20 was obtained. This is as shown in SEQ ID NO: 1 in the sequence listing. Further, after decomposition of the purified protein by re Jirue down de peptidase, by reverse-phase high-performance liquid Loma Togura Fi chromatography (V ydac C 8) fractionating peptides minute, of the resulting a Furagume down bets A The amino acid sequence was analyzed using the amino acid sequencer described above. The amino acid sequence of this fragment was as shown in SEQ ID NO: 2 in the sequence listing.
- Example 2 The N-terminal amino acid sequence, partial amino acid sequence, and amino acid composition of Example 2 revealed that FDF-3 was a C-terminal fragment of fibronectin.
- FDFF-3 was analyzed using a Bronectin monoclonal antibody. It is known that human fibronectin is degraded into several fragments by limited digestion with samolysin and trypsin [Sekiguchi: K. et. A1: J. Biol. Chem., 2 6 0 510 (19985)], the anti-fibronectin monoclonal antibody FN8-12 recognizes a fragment with a molecular weight of 220,000 which is limitedly degraded by thermolysin.
- FIG. 1 recognizes a disulfide-bonded dimer having a molecular weight of about 600, which is similarly obtained by limited digestion.
- FIG. 1 shows a limited fragment of fibronectin by thermolysin and a schematic diagram of a domain for recognition of each monoclonal antibody.
- Example 4 It was subjected to SDS-polyacrylamide electrophoresis (4-20%) under the reduction of FDF-3 obtained in Example 1 and human fibronectin (Izuki glass). Then, Western blot to a two-mouthed cellulose membrane, block the membrane with skim milk, add FN 8-12 or FN 1-1 (all purchased from Takara Shuzo) for 1 hour Reacted. After washing, an anti-mouse Ig antibody labeled with horseradish peroxidase was added and reacted for 1 hour. After washing, a protein reacting with the monoclonal antibody was detected by an ECL system (purchased from Amersham). As a result, it was found that FN 8-1 2 recognized FDF-3 but not FN 1-1. These results suggest that FDF-3 does not have a disulfide bond at the C-terminus. Example 4.
- mice Female mice were intravenously injected with 15-OmgZKg of 5-fluorouracil, and bone marrow cells were collected from the femur 48 hours later.
- Culture was performed by a methylcellose method modified from the method of IscoVe et al. 5 X 1 0 added 4 bone marrow cells in serum-free medium of the following pairs formed, was 1 ml.
- Cultivation was carried out at 37 in a 5% CO 2 , 100% humidity incubator.
- Example 4 The same measurement as in Example 4 was performed using a mouse stem cell factor (m SCF) instead of G-CSF in Example 4.
- m SCF mouse stem cell factor
- Table 3 shows the results.
- Table 3 Hemopoietic stem cell proliferative activity of FDF-13 on 5FU-treated mouse bone marrow cells
- Measurement of proliferation activity of blood cells using human cord blood monocytes Separate monocytes from human cord blood and add the sample or various hematopoietic factors using the medium described in Example 4. The cells were cultured in an incubator at 7 C, 5% C 0.5% N 2 and humidity 100%. The colonies on the 14th and 21st days of culture were observed under an inverted microscope, and the number of each colony was calculated. Table 4 shows the results. The concentration of the sample and hematopoietic factor added to the culture was FDF-3: 1 ⁇ g / m 1 ⁇ human fibronectin (Iwaki): 10; t / g Zml, human GM—CSF (Cosmoby) i SOng Zml.
- RNA was prepared from normal human fibroblasts by the lithium chloride Z urea method [Auffrayet. A.1, Eur. J. Biochem. 107,303 (1980)]. .
- the obtained RNA was dissolved in 10 mM Tris-HCl buffer (PH7.5) (hereinafter abbreviated as TE) containing ImM EDTA and heated at 70 C for 5 minutes.
- TE Tris-HCl buffer
- RNA solution was added to the oligo dT cellulose column equilibrated with TE containing 1 and washed with the same buffer, and then 2 mM EDTA solution containing 0.01% SDS (pH 7. The poly (A) RNA adsorbed in 5) was eluted.
- FDF-3 was found to be a fragment of fibronectin. Therefore, the nucleotide sequence of fibronectin homologous to the N-terminal amino acid sequence of FDF-3 was determined.
- an antisense primer was synthesized using a DNA synthesizer based on the C-terminal nucleotide sequence of fibronectin.
- the nucleotide sequences of the primers are shown below.
- Sense primer 5 'AACCAACCTACGGA TGACTC 3 '(SEQ ID NO: 3 in the sequence listing).
- Antisense primer 5 'TTAGTCTCGGGA AT CTTCTC 3' (SEQ ID NO: 4 in the sequence listing)
- the method of Gubler et al. [Gubler, V , et. a 1. cDNA was synthesized according to Gene. 25, 23 (1987). Transfer 1/20 volume of the synthesized cDNA and the two primers described above to each of 20 pmo1 in a 0.5 ml microcentrifuge tube, and add 20 mM Tris-HCl buffer (pH 8 . 3), 1.
- FIG. 2 shows a method for preparing the expression vector pSR / FN14.
- Expression vector pc DL— SR 2 9 6 [Tak Cell..Bio._8, 446 (1988) is digested with restriction enzymes EcoRI and KpnI, and the alkaline phosphatase is digested. Dephosphorylate in advance.
- the vector pHPlB5 [V an Snick,
- A.Eur.J.Immunol. 1—8,193 (1988) was digested with DraI, and KpnI linker was digested with T4 DNA ligase. One connected. After digestion with EcoRI and Kp_nI, this was electrophoresed on a 1% agarose gel, and a DNA fragment of about 830 bp containing mouse IL-6c DNA was prepared according to a standard method. did. This DNA fragment was ligated to pcDL-SR ⁇ 296 prepared above using ⁇ 4DN ligase. Escherichia coli is transformed using this, and plasmid DNA is obtained from the resulting transformant by a conventional method (Molec u l a r C l on i n g.
- NeIork, 1982 prepared from CdldSpringHarborRabry.NeYork, 1982) to obtain a mouse IL-16 expression vector pSRamLL-6.
- pSRamIL-6 is digested with the restriction enzyme AccIII, blunt-ended with DNA polymerase I (Klenow fragment), and then dephosphorylated with alkaline phosphatase.
- the FDF-3c DNA fragment obtained in (2) is blunt-ended with T4 DNA polymerase and phosphorylated with T4 DNA kinase according to a conventional method. This DNA fragment is added to A obtained above using T4 DNA ligase. Connected. Using this, Escherichia coli was transformed, and plasmid DNA was prepared from the resulting transformant by a conventional method.
- the plasmid DNA was digested with the restriction enzyme Ec0RI to confirm that the desired DNA fragment was incorporated (the vector was called pSRaFN14).
- the DNA sequence of FDF-3c DNA was determined by the dideoxy method [Proberet. A 1. Science, 238, 336 (1987)] using the DA analysis system (Appon). It was determined (base sequence from 1st to 567th of SEQ ID NO: 5 in the sequence listing).
- PSRaFN14 obtained in (3) above is a vector that expresses mouse IL-6 and FDF-3 chimeric proteins.
- the seven N-terminal amino acids (PhePro'ThrSerGinVa1Arg) are derived from mouse IL-6, followed by the FDF-3 sequence.
- 1 O jug of pSRaFN14 was added to 5 OmM Tris-HCl buffer (pH 7.5), 400 ⁇ g Zm1 of DEAE Dextran (Pharmacia) and 1 Add 4 ml RPMI 1640 medium containing 0 / M black mouth kin (Sigma).
- COS-1 cells (ATCC CRL) cultured in RPMI 1640 medium containing 10% fetal serum (Gibco) in a 10 cm diameter dish until they reach 50% confluence — 1 65 0) with PBS 1 After washing times, a DNA mixture of 4 m 1 obtained above was added, and cultured under the conditions of 5% C 0 2, 3 7 C. After 4 hours, the cells were washed with PBS, and cultured in 20 ml of RPMI 1640 medium at 5%, 37 C for 4 days. The culture supernatant was collected, and ammonium sulfate was gradually added to and dissolved at 80% saturation, and the mixture was placed at 4 C overnight.
- RPMI 1640 medium containing 10% fetal serum (Gibco) in a 10 cm diameter dish until they reach 50% confluence — 1 65 0) with PBS 1
- a DNA mixture of 4 m 1 obtained above was added, and cultured under the conditions of 5% C 0 2, 3 7 C. After 4 hours,
- the precipitate was collected by centrifugation at 650 rpm for 20 minutes, dissolved in 20 mM Tris-HCl buffer (pH 8.0), dialyzed thoroughly with the same buffer, and concentrated with ammonium sulfate. Liquid.
- the 10 ⁇ I ammonium sulfate concentrate was reduced and subjected to SDS-polyacrylamide electrophoresis (412%). After that, Western blotting was performed on a 2-nitrocellulose membrane, and the membrane was blocked with skim milk. Then, FN8-12 (purchased from Yukara) was added and reacted for 1 hour. After washing, an anti-mouse Ig antibody labeled with horseradish peroxidase was added and reacted for 1 hour. After washing, a protein reacting with the monoclonal antibody was detected using an ECL system (purchased from Amersham). As a result, expression of FDF-3 was confirmed.
- Example 4 the biological activity of FDF-3 in the culture supernatant obtained by introducing pSRaFN14 into COS-11 cells and culturing for 4 days is shown in Example 4. Measured by the method. Since monkey IL-16 is present in COS-1 cells, an anti-human IL-16 antibody was used to neutralize this activity. In addition, the activity was measured. As a result, as shown in Table 5, the biological activity was observed in the recombinant FDF-3 as in the natural type.
- Example 8 the biological activity was observed in the recombinant FDF-3 as in the natural type.
- Example 7 (2) In place of the anti-sensor primer of Example 7 (2), the following seven types of sequences were used, and corresponding to the anti-sensor primer by the same method as in Examples 7 (2) and (3).
- the nucleotide sequences of seven types of FDF-3c DNA having different C-terminal amino acids were determined.
- the physiologically active protein of the present invention supports the proliferation of hematopoietic stem cells in an evaluation system using mouse bone marrow cells, bone marrow suppression (for example, an anticancer agent) Use for the treatment of bone marrow dysfunction (such as aplastic anemia) after use or after bone marrow transplantation, or for the use of bone marrow transplantation treatment as an in vitro increase agent for peripheral blood stem cells and bone marrow stem cells.
- the physiologically active protein of the present invention can be used as a platelet-increasing agent because it stimulates megakaryocyte colonies, and can be used as a therapeutic agent for leukopenia because it increases neutrophils.
- Fragment type N-terminal fragment
- Fragment type middle part fragment
- Type of S2 row Other nucleic acid Synthetic DNA
- Sequence type other nucleic acid synthetic DNA
- Sequence type nucleic acid
- Sequence type nucleic acid
- Sequence type other nucleic acid synthetic DNA
- Sequence type nucleic acid
- Sequence type other nucleic acid synthetic DNA
- Sequence type nucleic acid
- Sequence type other nucleic acid synthetic DNA
- Sequence type other nucleic acid synthetic DNA
- Sequence type nucleic acid
- Type of row S2 Other nucleic acid synthesis D N A
- Sequence type nucleic acid
- Sequence type other nucleic acid synthetic DNA
- Sequence type nucleic acid
- Sequence type other nucleic acid synthetic DNA
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US08/142,449 US5668104A (en) | 1992-03-31 | 1993-03-31 | Hematopoietic stem cell growth-promoting compositions containing a fibroblast-derived fragment of fibronectin and a growth factor, and methods employing them in vitro or in vivo |
EP19930906858 EP0590156A4 (en) | 1992-03-31 | 1993-03-31 | Novel, physiologically active protein and hemopoietic stem cell growth promoter |
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US20040082003A1 (en) * | 2000-02-23 | 2004-04-29 | Guy Sauvageau | Stem cell expansion enhancing factor and method of use |
US7311905B2 (en) | 2002-02-13 | 2007-12-25 | Anthrogenesis Corporation | Embryonic-like stem cells derived from post-partum mammalian placenta, and uses and methods of treatment using said cells |
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US20070036770A1 (en) * | 2005-08-12 | 2007-02-15 | Wagner Darrell O | Biologic device for regulation of gene expression and method therefor |
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WO2008046510A1 (en) * | 2006-10-16 | 2008-04-24 | Bayer Healthcare Ag | Fn1 as a biomarker, therapeutic and diagnostic target |
CA2677679A1 (en) | 2007-02-12 | 2008-08-21 | Anthrogenesis Corporation | Hepatocytes and chondrocytes from adherent placental stem cells; and cd34+, cd45- placental stem cell-enriched cell populations |
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WO2012092485A1 (en) | 2010-12-31 | 2012-07-05 | Anthrogenesis Corporation | Enhancement of placental stem cell potency using modulatory rna molecules |
EP3443968A1 (en) | 2011-06-01 | 2019-02-20 | Celularity, Inc. | Treatment of pain using placental stem cells |
WO2013055476A1 (en) | 2011-09-09 | 2013-04-18 | Anthrogenesis Corporation | Treatment of amyotrophic lateral sclerosis using placental stem cells |
CN105142651A (zh) | 2013-02-05 | 2015-12-09 | 人类起源公司 | 来自胎盘的自然杀伤细胞 |
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- 1993-03-31 US US08/142,449 patent/US5668104A/en not_active Expired - Fee Related
- 1993-03-31 EP EP19930906858 patent/EP0590156A4/en not_active Withdrawn
- 1993-03-31 WO PCT/JP1993/000404 patent/WO1993020228A1/ja not_active Application Discontinuation
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EP0590156A1 (en) | 1994-04-06 |
CA2110283A1 (en) | 1993-10-14 |
EP0590156A4 (en) | 1994-07-13 |
US5668104A (en) | 1997-09-16 |
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