WO2011125860A1 - ラミニン5を含んだ系で細胞を培養する方法 - Google Patents
ラミニン5を含んだ系で細胞を培養する方法 Download PDFInfo
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- WO2011125860A1 WO2011125860A1 PCT/JP2011/058265 JP2011058265W WO2011125860A1 WO 2011125860 A1 WO2011125860 A1 WO 2011125860A1 JP 2011058265 W JP2011058265 W JP 2011058265W WO 2011125860 A1 WO2011125860 A1 WO 2011125860A1
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- cells
- laminin
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/78—Connective tissue peptides, e.g. collagen, elastin, laminin, fibronectin, vitronectin or cold insoluble globulin [CIG]
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/0068—General culture methods using substrates
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2533/00—Supports or coatings for cell culture, characterised by material
- C12N2533/50—Proteins
- C12N2533/52—Fibronectin; Laminin
Definitions
- the present invention relates to a method for culturing cells in a system containing laminin 5.
- Laminin is an extracellular matrix protein that is mainly localized in the basement membrane of various tissues and plays an important role in maintaining tissue structure and controlling cell function (Matrix Biol., 18: 19-28, 1999; Dev. Dyn., 218: 213-234, 2000).
- laminin is a heterotrimeric molecule in which ⁇ chain, ⁇ chain, and ⁇ chain are linked by disulfide bonds, respectively, and has a characteristic cross structure. Each chain consists of multiple domains, and domains I and II form a triple helix.
- ⁇ chains ⁇ 1 to ⁇ 5
- 3 types of ⁇ chains ⁇ 1 to ⁇ 3
- 3 types of ⁇ chains ⁇ 1 to ⁇ 3
- each laminin isoform has a unique site and function, mainly through cell membrane receptor integrins, cell adhesion, proliferation, movement, differentiation, etc. (Dev. Dyn. 218, 213-234, 2000; Physiol. Rev. 85, 979-1000, 2005).
- the ⁇ 2 chain exists mainly in muscles and nerve tissues, whereas the ⁇ 3 chain exists mainly in skin tissues.
- Each function is also different, and the ⁇ 2 chain gene abnormality causes muscular dystrophy, whereas the ⁇ 3 chain gene abnormality causes a serious symptom of junctional epidermolysis bullosa (Dev. Dyn. 218, 213-234). 2000). It also shows a completely different function in in vitro experiments.
- Laminin 2 and laminin 4 having an ⁇ 2 chain as a constituent chain show little adhesion activity to mesenchymal stem cells, whereas laminin 5 having an ⁇ 3 chain as a constituent chain shows a very strong adhesive activity (Stem Cell. 24, 2346-2354, 2006).
- the ⁇ , ⁇ , and ⁇ chains constituting each laminin isoform are different, the functions and activities are completely different.
- Table 1 shows 15 laminin molecular species and their subunit structures.
- Laminin molecules associate with each other at the triple-stranded amino (N) terminal portion (short arm) or associate with other matrix molecules to construct a basement membrane.
- N triple-stranded amino
- LG1-LG5 domain homologous globular domains
- C carboxy
- Laminin 5 (also referred to as kalinin, epiligrin, nisin, and radosine) is one of laminin isoforms consisting of ⁇ 3 chain, ⁇ 3 chain, and ⁇ 2 chain, and has been discovered by multiple research institutions with different circumstances (J. Cell Biol 114, 567-576, 1991; Cell 65, 599-610, 1991; J. Invest Dermatol. 101, 738-743, 1993; Proc. Natl. Acad. Sci. USA. 90, 11767-11717, 1993).
- Laminin 5 has been reported to exhibit strong cell adhesion activity, cell dispersion activity, cell proliferation activity and the like for various cells (Proc. Natl. Acad. Sci. USA. 90, 11767-11717, 1993; Biochem. 116, 862-869, 1994; J. Cell Biol. 125, 205-214, 1994; Mol. Biol. Cell. 16, 881-890, 2005; Stem Cell. 24, 2346-2354, 2006).
- International publication WO2007 / 023875 describes a mesenchymal stem cell culture technique using laminin-5.
- the object of the present invention is to provide a technique for increasing the activity of laminin 5 in a method for culturing cells in a system containing laminin 5.
- the present inventors have conceived the present invention by finding that various activities of laminin 5 increase when a specific polypeptide is used together with laminin 5 in a method of culturing cells in a system containing laminin 5.
- the present invention includes the following embodiments as preferred embodiments.
- [Aspect 1] In a method of culturing cells in a system containing laminin 5, Serum, serum albumin, prealbumin, immunoglobulin, ⁇ -globulin, ⁇ -globulin, ⁇ 1-antitrypsin ( ⁇ 1-AT), heptoglobin (Hp), ⁇ 2-macroglobulin ( ⁇ 2-M), ⁇ -fetoprotein (AFP) ), Transferrin, retinol binding protein (RBP) or blood protein other than extracellular matrix protein which is adiponectin, and a polypeptide selected from the group consisting of gelatin and a protein belonging to the tumor necrosis factor (TNF) family, peptone In a culture system.
- TNF tumor necrosis factor
- Aspect 2 The method according to aspect 1, wherein the protein belonging to the tumor necrosis factor (TNF) family is a receptor activator NF (B ligand (RANKL)).
- RNKL receptor activator NF
- the peptone is selected from the group consisting of cottonseed-derived peptone, soybean-derived peptone, wheat-derived peptone and pea-derived peptone.
- the cell culture container is treated with laminin 5 after being treated with the polypeptide, or simultaneously with the polypeptide and laminin.
- any one of aspects 1 to 4, wherein the activity of laminin 5 on cells is selected from the group consisting of cell adhesion activity, cell dispersion activity, wound healing activity, growth promoting activity, undifferentiation maintenance activity and pluripotency maintenance activity
- the cells are selected from the group consisting of pluripotent stem cells, tissue stem cells, somatic cells, germ cells, and sarcoma cells.
- the pluripotent stem cells are selected from embryonic stem cells, induced pluripotent stem cells, embryonic germ cells, or germ stem cells;
- the tissue stem cells are selected from mesenchymal stem cells, hepatic stem cells, pancreatic stem cells, neural stem cells, skin stem cells, or hematopoietic stem cells; or Somatic cells are hepatocytes, pancreatic cells, muscle cells, bone cells, osteoblasts, osteoclasts, chondrocytes, adipocytes, skin cells, fibroblasts, pancreatic cells, kidney cells, lung cells, or lymphocytes Selected from erythrocytes, leukocytes, monocytes, macrophages or megakaryocyte blood cells, The method according to embodiment 6.
- [Aspect 13] The composition of embodiment 12, further comprising laminin 5.
- [Aspect 14] Serum, serum albumin, prealbumin, immunoglobulin, ⁇ -globulin, ⁇ -globulin, ⁇ 1-antitrypsin ( ⁇ 1-AT), heptoglobin (Hp), ⁇ 2-macroglobulin ( ⁇ 2-M), ⁇ -fetoprotein (AFP) ), Transferrin, retinol binding protein (RBP) or blood protein other than extracellular matrix protein which is adiponectin, and a polypeptide selected from the group consisting of gelatin and a protein belonging to the tumor necrosis factor (TNF) family, peptone
- TNF tumor necrosis factor
- laminin 5 and a specific polypeptide are used in combination to select from the group consisting of cell adhesion activity, cell dispersion activity, wound healing activity, growth promoting activity, undifferentiation maintenance activity and pluripotency maintenance activity. , The activity of laminin 5 on cells is increased.
- FIG. 1 is a diagram in which purified recombinant human laminin 5 is electrophoresed on SDS polyacrylamide gel.
- the right lane in FIG. 1 shows the result of electrophoresis of 1 ⁇ g of recombinant human laminin 5.
- FIG. 2 is a graph showing the effects of recombinant human laminin 5 (0.25 ⁇ g / ml) and various blood proteins on cell adhesion activity against BRL cells.
- FIGS. 2A-D show the results for each concentration (0-800 ⁇ g / ml) shown in the figures for human serum albumin (HSA), bovine serum albumin (BSA), human serum (HS) and IgG, respectively.
- FIG. 3 shows the results of examining the optimum concentration of HSA that increases the cell adhesion activity of recombinant human laminin 5 to BRL cells at each concentration (0-2 ⁇ g / ml) indicated on the horizontal axis.
- rHSA recombinant HSA
- FIG. 5 shows the effects of gelatin (Gel), sRANKL, and peptone (Pep) that increase the cell adhesion activity of recombinant human laminin 5 to BRL cells at each concentration (0-2 ⁇ g / ml) indicated on the horizontal axis. The results are shown.
- FIG. 6 shows the results of examining the effect of each concentration of Pep on the horizontal axis (0-2 ⁇ g / ml) at each concentration of Pep that increases the cell adhesion activity of recombinant human laminin 5 to BRL cells.
- FIG. 7 is a graph showing the results of examining whether recombinant human laminin 5 (0.25 ⁇ g / ml) and various saccharides have an effect on cell adhesion activity to BRL cells.
- FIG. 7A-D show the results for each concentration (0-10 ⁇ g / ml) shown in the figures for xylose (Xyl), trehalose (Tre), mannose (Man) and lactose (Lac), respectively.
- FIG. 8 is a graph showing the results of examining whether recombinant human laminin 5 (0.25 ⁇ g / ml) and various sugars affect cell adhesion activity against BRL cells at higher concentrations.
- FIG. 8A shows the results for 100 ⁇ g / ml Tre and Man.
- FIG. 8B shows the results for 100 ⁇ g / ml Xyl and Lac.
- FIG. 9 is a graph showing the results of examining whether recombinant human laminin 5 (0.25 ⁇ g / ml) and various amino acids have an effect on cell adhesion activity against BRL cells.
- FIG. 9A Black diamond mark, recombinant human laminin 5 only (control) White square mark, recombinant human laminin 5 + HSA 10 ⁇ g / ml White triangle mark, recombinant human laminin 5 + glycine (Gly) 10 ⁇ g / ml Light triangle, recombinant human laminin 5 + Gly 100 ⁇ g / ml Black triangle mark, recombinant human laminin 5 + Gly 1000 ⁇ g / ml FIG.
- FIG. 10 is a diagram showing a synergistic effect on the cell adhesion activity of recombinant human laminin 5 when two kinds of blood proteins are used. Each blood protein shown on the horizontal axis was used at the indicated concentration.
- FIG. 11 shows the results of studying the order of processing the cell incubator. Recombinant human laminin 5 was used at a concentration (0-2 ⁇ g / ml) indicated on the horizontal axis.
- FIG. 12 shows the results of examining the optimum concentration of recombinant HSA (rHSA) that increases the cell adhesion activity of recombinant human laminin 5 to HT1080 cells at each concentration (0-2 ⁇ g / ml) indicated on the horizontal axis. Show.
- FIG. Black diamond mark, recombinant human laminin 5 only (control) White square mark, recombinant human laminin 5 + rHSA 0.78125 ⁇ g / ml White triangle mark, recombinant human laminin 5 + rHSA 3.125 ⁇ g / ml X, recombinant human laminin 5 + rHSA 12.5 ⁇ g / ml
- FIG. Black diamond mark, recombinant human laminin 5 only (control) White square mark, recombinant human laminin 5 + rHSA 0.78125 ⁇ g / ml White triangle mark, recombinant human laminin 5 + rHSA 3.125 ⁇ g / ml X, recombinant human laminin 5 + rHSA 12.5 ⁇ g / ml
- FIG. 13 shows the results of recombinant HSA (rHSA) that increases the cell adhesion activity of recombinant human laminin 5 to human mesenchymal stem cells (hMSC) cells at each concentration (0-2 ⁇ g / ml) indicated on the horizontal axis. The result of examining the appropriate concentration is shown.
- rHSA recombinant HSA
- FIG. Black diamond mark, recombinant human laminin 5 only (control) White square mark, recombinant human laminin 5 + rHSA 0.78125 ⁇ g / ml White triangle mark, recombinant human laminin 5 + rHSA 3.125 ⁇ g / ml X, recombinant human laminin 5 + rHSA 12.5 ⁇ g / ml
- FIG. Black diamond mark, recombinant human laminin 5 only (control) White square mark, recombinant human laminin 5 + rHSA 0.78125 ⁇ g / ml White triangle mark, recombinant human laminin 5 + rHSA 3.125 ⁇ g / ml X, recombinant human laminin 5 + rHSA 12.5 ⁇ g / ml
- FIG. 14 shows the results of examining the optimum concentration of recombinant HSA (rHSA) that increases the cell adhesion activity of recombinant human laminin 5 to EB3 cells at each concentration (0-16 ⁇ g / ml) indicated on the horizontal axis. Show.
- FIG. 15 is a photograph showing cell morphology after adhesion analysis of EB3 cells when rHSA (12.5 ⁇ g / ml) was added to recombinant human laminin 5 at each concentration shown in the figure. The left side is when rHSA is not used (control), and the right side is when rHSA is used.
- FIG. 15 is a photograph showing cell morphology after adhesion analysis of EB3 cells when rHSA (12.5 ⁇ g / ml) was added to recombinant human laminin 5 at each concentration shown in the figure. The left side is when rHSA is not used (control), and the right side is when rHSA is used.
- FIG. 15 is a photograph showing cell morphology after adhesion analysis of EB3 cells when rHSA (12.5 ⁇ g / ml) was added to recombinant human laminin 5 at each concentration shown in the figure. The left side is when rHSA is not used (control), and the
- FIG. 16 is a diagram showing the results of examining whether HSA has an effect of increasing cell adhesion activity in the same manner as laminin 5 against other laminin isoforms other than human laminin 5.
- concentration indicated on the horizontal axis was used.
- FIG. 17 is a diagram showing the results of examining whether or not rHSA has an increasing effect on cell adhesion activity similar to laminin 5 against other extracellular matrix proteins other than human laminin 5 and laminin isoforms.
- Vitronectin Vn / SIGMA
- laminin 2 Lm2 / Millipore
- FIG. 18 shows the results of examining the activity-increasing effect of rHSA (10 ⁇ g / ml) on the cell dispersion activity of recombinant human laminin 5 at each concentration (0-0.2 ⁇ g / ml) indicated on the horizontal axis on BRL cells. . It was observed that the activity increasing effect by rHSA was particularly remarkable when the concentration of rLm5 was 0.02 ⁇ g / ml.
- FIG. 19 is a photograph showing the results of examining the activity increasing effect of rHSA (10 ⁇ g / ml) on the cell dispersion activity of recombinant human laminin 5 at various concentrations (0-0.2 ⁇ g / ml) on BRL cells.
- FIG. 19 is a photograph showing the results of examining the activity increasing effect of rHSA (10 ⁇ g / ml) on the cell dispersion activity of recombinant human laminin 5 at various concentrations (0-0.2 ⁇ g /
- FIG. 20 shows the results of examining the activity-increasing effect of rHSA (10 ⁇ g / ml) on the wound healing activity of recombinant human laminin 5 at each concentration (0-0.1 g / ml) indicated on the horizontal axis against BRL cells. . It was observed that the activity increasing effect by rHSA was particularly remarkable when the concentration of rLM5 was 0.0125-0.05 ⁇ g / ml.
- FIG. 21 is a photograph showing the results of examining the effect of increasing the activity of rHSA (10 ⁇ g / ml) on the wound healing activity of recombinant human laminin 5 at various concentrations (0-0.1 g / ml) on BRL cells.
- FIG. 22 is a diagram showing the results of examining the activity increasing effect of rHSA (10 ⁇ g / ml) on the proliferation activity of recombinant human laminin 5 on hMBC cells.
- FIG. 23 is a diagram showing the results of examining the activity increasing effect of rHSA (10 ⁇ g / ml) on the proliferation activity of recombinant human laminin 5 on EB3 cells.
- FIG. 24 is a diagram showing the results of examining the activity increasing effect of rHSA in the case of using various cell support materials for the proliferation activity of recombinant human laminin 5 on EB3 cells.
- FIG. 25 is a diagram showing the results of detecting undifferentiated markers for S + G and K + L (0.05 ⁇ g / ml) + H (12.5 ⁇ g / ml) in which proliferation was observed in FIG.
- the present invention relates to a method for culturing cells in a system containing laminin 5.
- the method of the present invention is a method for culturing cells in a system containing laminin 5, Serum, serum albumin, prealbumin, immunoglobulin, ⁇ -globulin, ⁇ -globulin, ⁇ 1-antitrypsin ( ⁇ 1-AT), heptoglobin (Hp), ⁇ 2-macroglobulin ( ⁇ 2-M), ⁇ -fetoprotein (AFP) ), Transferrin, retinol binding protein (RBP) or blood protein other than extracellular matrix protein which is adiponectin, and a polypeptide selected from the group consisting of gelatin and a protein belonging to the tumor necrosis factor (TNF) family, peptone In the culture system.
- TNF tumor necrosis factor
- Laminin 5 The method of the present invention is characterized by culturing pluripotent stem cells in a system containing laminin 5 when culturing pluripotent stem cells.
- Laminin 5 has been reported to exhibit strong adhesion activity against many cell types compared to various extracellular matrix proteins including other laminin isoforms (J. Biochem. 116, 862-869, 1994, J. Cell Biol. 125, 205-214, 1994, Mol Biol Cell. 16, 881-890, 2005).
- laminin 5 is a laminin molecule composed of an ⁇ 3 chain, a ⁇ 3 chain, and a ⁇ 2 chain, and plays a central role in the binding of the epidermis to the dermis and is preferential to the integrin ⁇ 3 ⁇ 1 in most cells. However, some cells also bind to integrins ⁇ 6 ⁇ 1 and ⁇ 6 ⁇ 4. It has been elucidated that the ⁇ 3G2A sequence of the ⁇ 3 chain G2 domain in Laminin 5 (RERFNISTPAFRGCMKNLKKTS) and the KRD sequence of the G3 domain are the main binding sites for integrins.
- Laminin 5 is secreted as a trimer and then undergoes limited degradation by protease to remove the G4 and G5 domains at the C-terminus of the ⁇ 3 chain, converting from 190 kDa (non-cleavable) to 160 kDa (cleaved). It is known that Laminin 5 isolated by the usual method does not have G4 and G5 domains. Such ⁇ 3-chain-cut laminin 5 is known to have higher cell adhesion promoting activity, exercise promoting activity, and nerve regeneration promoting activity than non-cleavable laminin 5 (J. Biol. Chem., 280). (2005), 14370-14377).
- the laminin 5 of the present invention is not particularly limited, and may be a non-cleavable type that contains the G4 and G5 domains, or may be a cleaved type in which the entire G4 and G5 domains or a part thereof is removed. .
- the laminin 5 protein may be a natural type or a modified type in which one or more amino acid residues are modified while retaining its biological activity, particularly cell adhesion promoting activity. Moreover, as long as the laminin 5 protein in this invention has the characteristics described in this specification, the origin, a manufacturing method, etc. are not limited. That is, the laminin 5 protein of the present invention may be a naturally occurring protein, a protein expressed from a recombinant DNA by genetic engineering techniques, or a chemically synthesized protein.
- laminin 5 protein is not particularly limited, but is preferably derived from human.
- human-derived laminin 5 it is preferable to use human-derived laminin 5 in order to avoid the use of materials derived from other animals.
- SEQ ID NOs: 1-6 in the sequence listing in this specification show the base sequence and amino acid sequence of ⁇ 3 chain, ⁇ 3 chain and ⁇ 2 chain of human laminin 5.
- the laminin 5 protein used in the present invention is preferably an ⁇ 3 chain (amino acid residue) having the amino acid sequence of SEQ ID NO: 2 or an amino acid sequence in which one or more amino acids are deleted, added, or substituted in this sequence. Group No. 1-No. 1713) (J. Biol. Chem. 269, 22779-22787, 1994), the amino acid sequence of SEQ ID NO: 4, or one or more amino acids in this sequence deleted, added or substituted ⁇ 3 chain (amino acid residues No. 1 to No. 1170) (J. Biol. Chem.
- amino acid sequence of SEQ ID NO: 6, or 1 in this sequence It has an amino acid sequence in which more or more amino acids are deleted, added, or substituted It is a protein consisting of each subunit of ⁇ 2 chain (amino acid residues No. 1 to No. 1193) (J. Cell. Biol. 119, 679-693, 1992).
- ⁇ 3 chain globular domain (G1-G5 domain) is amino acid residue No. 1 of SEQ ID NO: 1, respectively. 794-No. 970, no. 971-No. 1139, no. 1140-No. 1353, no. 1354-No. 1529 and no. 1530-No. 1713.
- Each chain of laminin 5 may have an amino acid sequence in which one or more amino acid residues are deleted, added, or substituted in the amino acid sequence represented by the corresponding SEQ ID NO.
- a protein having an amino acid sequence homologous to such a natural protein can also be used in the present invention.
- the number of amino acids that can be changed is not limited in the amino acid sequences of ⁇ 3 chain, ⁇ 3 chain, and ⁇ 2 chain, but preferably 1 to 300 amino acid residues, 1 to 200 amino acid residues, and 1 to 150 amino acid residues.
- amino acid residues 1 to 120 amino acid residues, 1 to 100 amino acid residues, 1 to 80 amino acid residues, 1 to 50 amino acid residues, 1 to 30 amino acid residues, 1 to 20 amino acid residues, 1 to 15 amino acid residues 1 to 10 amino acid residues and 1 to 5 amino acid residues.
- the number of amino acid residues that can be modified by a known site-directed mutagenesis method for example, 1 to 10 amino acid residues, 1 to 5 amino acid residues is more preferable.
- substitutions include replacing an amino acid with a residue having similar physicochemical properties, eg, one fatty acid residue (Ile, Val, Leu or Ala) with another, or a basic residue Substitution is included between Lys and Arg, acidic residues Glu and Asp, amide residues Gln and Asn, hydroxyl residues Ser and Tyr, or aromatic residues Phe and Tyr.
- laminin 5 used in the present invention has at least 80%, 85%, 90%, 95%, 98% or 99% identity with the amino acid sequence set forth in SEQ ID NOs: 2, 4, 6. It may also be a protein that can promote cell adhesion activity.
- Identities are calculated by dividing the number of identical residues by the total number of residues in a known sequence or domain of a known sequence and multiplying by 100.
- Computer programs for determining sequence identity using standard parameters include, for example, Gapped BLAST PSI-BLAST (Nucleic Acids Res. 25, 3389-340, 1997), BLAST (J. Mol. Biol. 215). : 403-410, 1990), and Smith-Waterman (J. Mol. Biol. 147: 195-197, 1981) are available.
- the default settings of these programs are used, but these settings may be changed as desired.
- the laminin 5 protein in the present invention has the characteristics described in the present specification, its origin, production method and the like are not limited. That is, the laminin 5 protein of the present invention may be a culture supernatant of human or animal cells that secrete laminin 5, or a natural laminin 5 protein purified therefrom. However, laminin 5 can be effectively produced as a recombinant protein by expressing each subunit using recombinant DNA technology known in the art. However, it is particularly preferred to obtain laminin 5 as a human recombinant protein in the sense of avoiding unnecessary animal factors.
- nucleic acid residue No. 1 of SEQ ID NO: 1 encoding the ⁇ 3 chain of laminin 5.
- 1-No. A DNA sequence comprising 5139, the nucleic acid residue No. 3 of SEQ ID NO: 3 encoding the ⁇ 3 chain; 121-No. 3630 and nucleic acid residue No. 5 of SEQ ID NO: 5 encoding the ⁇ 2 chain.
- 118-No. Primers can be designed based on the base sequence of 3696, and can be produced by amplifying a target sequence by polymerase chain reaction (PCR) using an appropriate cDNA library as a template.
- PCR polymerase chain reaction
- a DNA encoding each chain gene of laminin 5 is incorporated into an appropriate vector, and this is introduced into either a eukaryotic or prokaryotic cell using an expression vector that can be expressed in each host.
- the desired protein can be obtained by expressing the chain.
- Host cells that can be used to express laminin 5 are not particularly limited, and prokaryotic host cells such as Escherichia coli and Bacillus subtilis, and eukaryotic hosts such as yeast, fungi, insect cells, and mammalian cells. Can be mentioned.
- a vector constructed to express laminin 5 is introduced into the above host cell by transformation, transfection, conjugation, protoplast fusion, electroporation, particle gun technology, calcium phosphate precipitation, direct microinjection, etc. Can do.
- a laminin-5 protein can be obtained by growing a cell containing the vector in an appropriate medium to produce the laminin-5 protein used in the present invention and purifying it from the cell or the medium. Purification can be performed using size exclusion chromatography, HPLC, ion exchange chromatography, immunoaffinity chromatography, and the like.
- Laminin 5 is described in detail in JP-A No. 2001-172196, and is incorporated herein.
- laminin is a heterotrimeric molecule in which ⁇ chain, ⁇ chain, and ⁇ chain are linked by disulfide bonds, respectively, and has a characteristic cross structure. Each chain consists of multiple domains, and domains I and II form a triple helix.
- laminin molecules Prior to this application, at least 15 laminin molecules were identified by different combinations of 5 types of ⁇ chains ( ⁇ 1 to ⁇ 5), 3 types of ⁇ chains ( ⁇ 1 to ⁇ 3), and 3 types of ⁇ chains ( ⁇ 1 to ⁇ 3). It has been suggested that there are actually several times as many types.
- Laminin 1 which is a typical laminin, is a heterotrimeric molecule composed of ⁇ 1, ⁇ 1, and ⁇ 1, and laminin 5 used in the present application is composed of ⁇ 3, ⁇ 3, and ⁇ 2.
- laminin 5 used in the present application is composed of ⁇ 3, ⁇ 3, and ⁇ 2.
- the homology of the polypeptide chain of laminin 1 and laminin 5 is analyzed with software such as Genetyx, the homology between ⁇ 1 and ⁇ 3 is 42%, the homology between ⁇ 1 and ⁇ 3 is 41%, and the homology between ⁇ 1 and ⁇ 2 is 54%.
- laminin 1 and laminin 5 are respectively ⁇ chain, ⁇ chain, ⁇ encoded by three different genes ( ⁇ 1, ⁇ 1, ⁇ 1) and ( ⁇ 3, ⁇ 3, ⁇ 2).
- vitronectin which is another extracellular matrix
- laminin 2 which is another laminin isoform
- Polypeptides The present invention is characterized in that various Lm5 activities are increased by using a specific polypeptide in cell culture in a cell culture system containing Lm5.
- Polypeptides include serum, serum albumin, prealbumin, immunoglobulin, ⁇ -globulin, ⁇ -globulin, ⁇ 1-antitrypsin ( ⁇ 1-AT), heptoglobin (Hp), ⁇ 2-macroglobulin ( ⁇ 2-M), ⁇ -Selected from the group consisting of blood proteins other than extracellular matrix proteins which are fetoprotein (AFP), transferrin, retinol binding protein (RBP) or adiponectin, as well as gelatin, a protein belonging to the tumor necrosis factor (TNF) family, peptone Is done.
- AFP fetoprotein
- RBP retinol binding protein
- TNF tumor necrosis factor
- blood protein in the present invention, blood protein, more preferably blood protein other than extracellular matrix protein, is used together with laminin-5 protein.
- the blood protein is preferably serum, serum albumin, prealbumin, immunoglobulin, ⁇ -globulin, ⁇ -globulin, ⁇ 1-antitrypsin ( ⁇ 1-AT), heptoglobin (Hp), ⁇ 2-macroglobulin ( ⁇ 2-M ), ⁇ -fetoprotein (AFP), transferrin, retinol binding protein (RBP) or adiponectin.
- ⁇ 1-AT heptoglobin
- Hp heptoglobin
- ⁇ 2-M ⁇ 2-macroglobulin
- AFP transferrin
- RBP retinol binding protein
- adiponectin adiponectin
- Extracellular matrix is a substance that fills the extracellular space and at the same time has a skeletal role (eg animal cartilage and bone), a role of scaffold in cell adhesion (eg basement membrane and fibronectin), cell proliferation It plays the role of holding and providing factors (eg, cell growth factor FGF that binds to heparan sulfate). It can be said that many of the individual cells constituting a multicellular organism live in a bed or nest of an extracellular matrix. Conspicuous components in the extracellular matrix of vertebrates including humans are glycoproteins (partially cell adhesion molecules) such as collagen, proteoglycan, fibronectin and laminin. “Extracellular matrix protein” means a protein constituting such an extracellular matrix.
- blood protein other than extracellular matrix protein means a protein other than extracellular matrix protein involved in cell adhesion among blood proteins. These are all known proteins and can be appropriately obtained by those skilled in the art.
- Bood proteins other than extracellular matrix proteins are not limited, but preferably human serum albumin (available from HSA / eg, Nacalai), recombinant human serum albumin (rHSA / eg, from SIGMA) Available), or bovine serum albumin (BSA / available from SIGMA, for example).
- human serum albumin available from HSA / eg, Nacalai
- rHSA / eg, from SIGMA recombinant human serum albumin
- BSA bovine serum albumin
- the “blood protein other than extracellular matrix protein” may alternatively be an immunoglobulin.
- Immunoglobulins are well known to those skilled in the art and include IgG, IgA, IgM, IgD, IgE and the like.
- human immunoglobulin IgG / for example, available from Oriental Yeast Co., Ltd. can be used.
- Gelatin Gelatin is extracted by applying heat to collagen, which is the main component of connective tissue such as animal skin, bones, and tendons, and contains protein as the main component.
- TNF Tumor necrosis factor
- TNF Tumor necrosis factor
- LT lymphphotoxin
- the “protein belonging to the TNF family” includes at least 19 kinds of molecules such as receptor activator NFkB ligand (RANKL), Fas ligand, CD40 ligand and the like.
- a receptor activator NF B ligand (RANKL)
- B ligand B ligand
- Peptone “Peptone” is obtained by degrading a protein with a proteolytic enzyme. In vivo, proteins are digested by pepsin in the stomach into peptone, and further digested to amino acids by pancreatic juice secreted by the pancreas and intestinal juice secreted by the jejunum.
- Peptone as a nutrient source of this medium is a protein hydrolyzed to amino acids and low molecular weight peptides.
- protein from milk milk casein
- protes such as pancreatin extracted from porcine pancreas are used
- peptone is preferably derived from a plant.
- it is selected from the group consisting of cottonseed-derived peptone, soybean-derived peptone, wheat-derived peptone and pea-derived peptone.
- Cells The type and origin of cells cultured in the method of the present invention are not particularly limited.
- the pluripotent stem cells are selected from embryonic stem cells, induced pluripotent stem cells, embryonic germ cells, or germ stem cells.
- the tissue stem cells are selected from mesenchymal stem cells, hepatic stem cells, pancreatic stem cells, neural stem cells, skin stem cells, or hematopoietic stem cells.
- the somatic cells are hepatocytes, pancreatic cells, muscle cells, bone cells, osteoblasts, osteoclasts, chondrocytes, adipocytes, skin cells, fibroblasts, pancreatic cells, kidney cells, lung cells, or , Lymphocytes, erythrocytes, leukocytes, monocytes, macrophages or megakaryocyte blood cells.
- the biological species from which the cells are derived is not particularly limited. Preferably, it is derived from mammals such as mice, rats, humans, monkeys, pigs, dogs, sheep, goats, and birds such as chickens. More preferably, it is derived from a species selected from the group consisting of mouse, rat and human.
- pluripotent stem cell is intended to be a generic term for stem cells having the ability to differentiate into cells of any tissue (differentiation pluripotency). In the examples described later in this specification, examination is performed using ES cells (EB3 cells).
- ES cells EB3 cells
- pluripotent stem cells that can be used in the method of the present invention are not limited to embryonic stem cells, but also mammalian cells. Examples include all pluripotent stem cells having traits similar to embryonic stem cells derived from adult organ and tissue cells, bone marrow cells, blood cells, and embryonic and fetal cells.
- embryonic stem cells traits similar to embryonic stem cells are specific to embryonic stem cells, such as the expression of genes specific to embryonic stem cells and the ability to differentiate into all germ layers of endoderm, mesoderm, and ectoderm. It can be defined with cell biological properties.
- ES cells embryonic stem cells
- iPS cells induced pluripotent stem cells
- EG cells embryonic germ stem cells
- GS cells germ stem cells
- ES cells and iPS cells are preferred as the pluripotent stem cells in the present invention.
- iPS cells are particularly preferred for reasons such as no ethical problems.
- Any known pluripotent stem cell can be used.
- the pluripotent stem cell described in International Publication WO2009 / 123349 (PCT / JP2009 / 057041) can be used.
- tissue stem cell means a stem cell that has the ability to differentiate into various cell types (differentiated pluripotency) although the cell line that can be differentiated is limited to a specific tissue. For example, hematopoietic stem cells in the bone marrow become blood cells, and neural stem cells differentiate into nerve cells. In addition, there are various types such as liver stem cells that make the liver and skin stem cells that become skin tissue.
- Somatic cells refers to cells other than germ cells among the cells constituting multicellular organisms. In sexual reproduction, it is not passed on to the next generation. In the present specification, it means various cells other than “pluripotent stem cells” and “tissue stem cells”.
- system containing laminin 5 cells are cultured in a system containing laminin 5.
- the “system containing laminin 5” means that laminin 5 is included in some form in the cell culture system, and its mode is not particularly limited.
- the “cell culture container” is not particularly limited, and any material and container of any shape that is sterilized to prevent bacterial contamination and suitable for culturing cells is used. be able to.
- Examples of such culture containers include culture dishes, culture flasks, culture petri dishes, 96-well, 48-well, 12-well, 6-well, 4-well, etc., commonly used in this technical field. Examples thereof include, but are not limited to, plates and culture bottles.
- laminin 5 and a polypeptide are used in cell culture.
- the surface of the cell culture vessel is subjected to a treatment such as immobilizing (coating) laminin 5 and the polypeptide.
- a treatment such as immobilizing (coating) laminin 5 and the polypeptide.
- a processing technique for immobilizing laminin on the surface of a culture container is known in the art, and those skilled in the art will employ any culture container according to the purpose of the present invention and treat the container with laminin 5 and polypeptide.
- the container can be used for culturing cells by the method of the present invention.
- the amount of laminin 5 used for processing the cell culture container is not particularly limited. Preferably, good results are obtained when treated with a laminin 5 solution of 0.01 ⁇ g / ml or more, preferably 0.1 to 15 ⁇ g / ml, more preferably 0.1 ⁇ g / ml-2 ⁇ g / ml.
- the culture container may be treated with laminin 5 by applying laminin 5 to the inner surface of the culture container and then drying.
- a culture medium generally used for culturing cells such as GMEM (GIBCO) and DMEM is placed in a culture container treated with laminin 5, and pluripotent stem cells are added to the culture medium.
- the cells are then cultured under known appropriate culture conditions, such as, but not limited to, 37 ° C., 5% carbon dioxide gas layer conditions.
- the cell culture vessel is preferably treated (coated) with laminin 5 and polypeptide.
- the order in which the cell culture vessel is treated is not particularly limited, but is preferably treated with laminin 5 after treating with the polypeptide or simultaneously with the polypeptide and laminin.
- the present invention also provides a composition for coating a cell culture container or a cell culture container coating agent comprising the aforementioned polypeptide.
- the composition or agent of the present invention may contain laminin 5 simultaneously with the polypeptide.
- the present invention further provides a kit comprising a cell culture medium containing the aforementioned polypeptide.
- a kit comprising a cell culture medium comprising the aforementioned polypeptide and laminin 5 is also provided.
- the kit of the present invention may further contain a precoat culture dish, a precoat culture plate, and the like.
- the present invention and the composition, agent and kit can be used in a method for culturing cells in a system containing laminin 5.
- the amount of polypeptide used is not particularly limited. Those skilled in the art can appropriately select an appropriate amount depending on factors such as the type of polypeptide used.
- the polypeptide is used at a concentration between 1 ⁇ g / ml and 200 ⁇ g / ml when using blood proteins such as HSA, BSA, HS, IgG in Example 1. It has proved particularly preferred when used at a concentration between 3.125 ⁇ g / ml and 12.5 ⁇ g / ml.
- laminin 5 showed an effect of increasing cell activity when used at a higher concentration, preferably 15.6 ⁇ g / ml to 1000 ⁇ g / ml.
- two or more polypeptides are included in the cell culture system.
- rHSA and IgG are used in combination as polypeptides, even when the concentrations are low enough (0.25 ⁇ g / ml) that they cannot be confirmed when each is used alone, both are used together.
- RHSA 10 ⁇ g / ml the same strong adhesive activity increasing effect was observed. Therefore, it is considered that a synergistic effect is obtained instead of an additive effect by using two or more kinds of polypeptides together.
- laminin 5 protein various activities exhibited by laminin 5 protein in cell culture are increased in combination with a polypeptide.
- the effects of laminin 5 protein include, but are not limited to, cell adhesion activity, cell dispersion activity, wound healing activity, growth promoting activity, undifferentiation maintenance activity and pluripotency maintenance activity.
- Cell adhesion activity means the effect of adhering cells.
- HSA HSA in combination with rLm5 (0.125 ⁇ g / ml)
- an adhesive activity equivalent to rLm5 (2 ⁇ g / ml) was obtained.
- the adhesive activity equivalent to rLm5 (2 ⁇ g / ml) was obtained by using HSA in combination with rLm5 (0.5 ⁇ g / ml). Therefore, the use of the polypeptide in the present invention preferably increases the cell adhesion activity by 1.2 times or more, more preferably by 4 times or more, and most preferably by 8 times or more, compared with the case where the polypeptide is not used.
- Cell dispersal activity means the effect of dispersing cells.
- the use of the polypeptide preferably increases the cell dispersion activity more than twice as compared to the case where the polypeptide is not used.
- “Wound healing activity” means the effect of healing a wound. That is, by applying laminin 5 or the like to a portion where the cell has been physically damaged due to trauma, for example, laminin 5 or the like is applied to allow the cell to migrate from around to the applied portion. The effect of healing the wound can be confirmed by, for example, measuring the width of the wound after a certain period of time (for example, after 16 hours) after being damaged. In Example 5, the wound healing rate increased from 60% to 80% by using a polypeptide (rHSA) in addition to human laminin 5.
- rHSA polypeptide
- “Proliferation promoting activity” means an effect of promoting cell proliferation.
- the effect of cell proliferation can be confirmed by measuring the number of cells after a certain period of time has passed since the cells were run.
- Undifferentiated maintenance activity means that when the cells to be cultured are undifferentiated cells such as pluripotent stem cells and tissue stem cells, the undifferentiated state is maintained. When these cells are cultured with laminin 5, the differentiation of the cells does not proceed and the undifferentiated state is maintained. In the present invention, it was confirmed that the undifferentiated state was maintained even when laminin 5 and the polypeptide were used in combination (Example 7, FIG. 25). For example, by measuring an undifferentiated marker such as Sox2, Nanog, Oct4, it is possible to evaluate whether tissue stem cells are differentiated during culture.
- an undifferentiated marker such as Sox2, Nanog, Oct4
- the “pluripotency maintenance activity” means to maintain the pluripotency when the cultured cell is a pluripotent cell, for example, a pluripotent stem cell.
- pluripotency is maintained even when laminin 5 and a polypeptide are used in combination.
- Example 1 Preparation of Recombinant Human Laminin 5 (rLm5)
- recombinant human laminin 5 protein was prepared according to a known method.
- a serum-free culture supernatant collected from human fetal kidney cell line HEK293 (Lm5-HEK293) into which cDNAs of ⁇ 3 chain (SEQ ID NO: 1), ⁇ 3 chain (SEQ ID NO: 3), and ⁇ 2 chain (SEQ ID NO: 3) were introduced was 4 ° C. Centrifugation was performed at 3000 rpm for 5 minutes.
- the human fetal kidney cell line HEK293 is described in J. Org. Biochem. 132, 607-612 (2002). Subsequently, it was applied to Heparin Sepharose CL-6B (GE healthcare) and eluted.
- the rLm5-containing fraction was passed through an antibody column in which a mouse anti-Lm- ⁇ 3 (anti-laminin ⁇ 3) monoclonal antibody (BG5) was covalently bound to Protein A Sepharose CL-6B (GE healthcare), and then eluted.
- the monoclonal antibody BG5 is an antibody prepared by the present inventors according to a known monoclonal antibody production method using a laminin ⁇ 3B chain N-terminal fragment as an antigen.
- FIG. 1 shows a photograph of the result of SDS polyacrylamide gel electrophoresis for purified rLm5.
- the purity of the purified rLm5 was about 98%.
- RLm5 prepared in this way was used in the following examples.
- Example 2 Cell Adhesion Assay This example shows the results of an adhesion assay when various additives are added to rLm5 and rLm5.
- rat liver cell line BRL
- mouse ES cell line EB3
- human sarcoma cell line HT1080
- human mesenchymal stem cell hMSC
- BRL was provided by Department of Genome Systems Science, graduate School of Life Nanosystem Science, Yokohama City University.
- EB3 was provided by the Department of Stem Cell Control, Department of Molecular Medicine, Department of Future Medical Development, graduate School of Medicine, Osaka University.
- HT1080 was obtained from RIKEN BioResource Center (RCB1956).
- hMSC was obtained from LONZA.
- BRL is DMEM / F12 supplemented with 10% fetal bovine serum (FBS)
- EB3 is 10% FBS
- 0.1 mM non-essential amino acid (Gibco) 1 mM sodium pyruvate (Gibco)
- 1000 U / ml ESGRO Millipore
- 10-4 M 2-mercaptoethanol (WAKO) added GMEM (GIBCO)
- HT1080 used 10% FBS added MEM (SIGMA), and hMSC MSCGM (LONZA).
- a serum-free medium obtained by removing serum from these media was used.
- a 96-well plate (Corning) was treated with rLm5 prepared at a concentration of 37 ° C. for 2 hours or overnight at 4 ° C., the treated surface was washed with PBS ( ⁇ ), and then washed with 1.2% BSA (SIGMA) solution at 37 ° C. The blocking treatment was performed for 1 hour.
- Treatment with rLm5 is optionally performed with human serum albumin (HSA / Nacalai), recombinant human serum albumin (rHSA / SIGMA), human serum (HS / OYC), bovine serum albumin (BSA / SIGMA), human immunoglobulin (IgG / OYC), bovine gelatin (Gl / SIGMA), recombinant human receptor activator of NF- ⁇ B ligand (sRANKL / OYC), cottonseed-derived peptone (Pep / DMV), glycine (Gly / Nacalai), arginine (Arg / Nacala ), Trehalose (Tre / SIGMA), xylose (Xyl / Wako), mannose (Man / Wako), and lactose (Lac / Wako).
- HSA / Nacalai human serum albumin
- rHSA / SIGMA recombinant human serum albumin
- FIGS. 2 to 11 show the results of the adhesion assay using BRL
- FIG. 12 shows the results of the adhesion assay using HT1080
- FIG. 13 shows the results of the adhesion assay using hMSC
- FIGS. 14 and 15 use EB3. The result of an adhesion assay is shown.
- the adhesion activity of rLm5 can be increased for various cells by treatment with a polypeptide or a peptide.
- the polypeptide concentration at the time of combination is optimal from 3.125 to 12.5 ⁇ g / ml, and the method of combination may not be simultaneous, and sufficient rLm5 activity can be obtained by pretreatment. It turns out that it can be raised.
- Example 3 Examination of activity increasing action in other extracellular matrix protein and laminin isoform
- human vitronectin Vn / SIGMA
- human laminin 2 Lm2 / Millipore
- the assay was performed according to the method described in Example 2.
- FIG. 16 shows the results of an adhesion assay when 10 ⁇ g / ml HSA is used in combination with FIG. 17 and 10 ⁇ g / ml rHSA is used in combination.
- no activity-increasing action by using HSA or rHSA in combination with rNm5 was observed with Vn or Lm2. From the above, it was found that the activity-increasing action is not a phenomenon that occurs in all extracellular matrix proteins, and is not a common phenomenon that occurs in any isoform, even laminin.
- Example 4 Cell dispersion assay using BRL cells
- BRL was provided by the Department of Genome System Science, graduate School of Life Nanosystem Science, Yokohama City University.
- BRL cells were cultured and grown using DMEM / F12 supplemented with 10% fetal bovine serum (FBS). However, in the cell dispersion assay, DMEM / F12 medium supplemented with 1% FBS was used.
- FBS fetal bovine serum
- a 24-well plate (Nunc) was treated with rLm5 prepared at a concentration at 4 ° C. overnight, and the treated surface was washed with PBS ( ⁇ ), followed by blocking with 1% BSA (SIGMA) solution at 37 ° C. for 1 hour. .
- the rLm5 treatment was performed by mixing rHSA as necessary. After washing the rLm5-treated surface with PBS ( ⁇ ), the cells were washed with 1% FBS medium, seeded at 7000 cells / well, and then seeded at 37 ° C., 5% CO 2 , 95% air under aerobic conditions. Time culture was performed.
- the cells with weak adhesion were suspended from the plate surface by shaking lightly with a vortex mixer, and the cells were removed by percoll treatment. Adhered cells were fixed with 25% glutaraldehyde, and pictures of three random fields were taken to count the number of single cells.
- Example 5 Wound healing assay using BRL cells
- BRL was provided by the Department of Genome System Science, graduate School of Life Nanosystem Science, Yokohama City University.
- BRL was cultured and grown using DMEM / F12 supplemented with 10% fetal bovine serum (FBS).
- FBS fetal bovine serum
- a medium supplemented with a serum-free medium obtained by removing serum from the medium was used in addition to the above medium.
- Cells were seeded on a 24-well plate (Nunc) at 160000 cells / well in 10% FBS medium, and cultured for 3 hours at 37 ° C., 5% CO 2 , 95% air. After culturing, the adherent cell population in each well was washed twice with a serum-free medium in which a fixed width was scratched using a blue chip and serum was removed. Each well was treated with rLm5 adjusted in serum-free medium at 37 ° C. for 1 hour. The rLm5 treatment was performed by mixing rHSA as necessary. After the rLm5 treatment, the treated surface was washed twice with a serum-free medium excluding serum, and a serum-free medium was added.
- FIG. 20 shows the results of the wound healing rate obtained. When rHSA was added to Lm5, a significant increase in wound healing activity was observed.
- Example 6 Proliferation Assay Using Human Mesenchymal Stem Cells This example shows the results of a proliferation assay using hMSC when various cell support materials are used.
- medium (P) supplemented with 5% Panexin (PAN-biotech) and medium (P + F) supplemented with 5% Panexin and 1 ng / ml bFGF (Wako Pure Chemical) were used instead of 10% FBS.
- a maintenance medium (Serum) containing 10% FBS was also used.
- a 6-well plate (NUNC) treated with various extracellular matrix proteins whose concentrations were adjusted was seeded with 38400 cells / well of hMSC replaced with each medium. The cells were cultured at 37 ° C., 5% CO 2 , 95% air for 10 days, and after 3 days, 7 days, and 10 days, the cells were collected by enzyme treatment, and the number of cells was counted with a hemocytometer. .
- the cell support material was prepared by adding 10 ⁇ g / ml rHSA to 1 mg / ml rLm5, 0.2 ⁇ g / ml rLm5, 0.2 ⁇ g / ml rLm5, respectively.
- FIG. 22 shows the results of examining the influence of hMSC on proliferation under each culture condition.
- rHSA was added to 0.2 ⁇ g / ml rLm5
- a significant increase in cell proliferation was observed.
- polypeptides including rHSA is active not only for cell adhesion activity, cell dispersion activity, and wound healing activity, but also for proliferation promoting activity of mesenchymal stem cells already reported as rLm5 activity. A rising action was observed. From this, it was predicted that the combined use of polypeptides including rHSA can increase all the activities of rLm5.
- Example 7 Proliferation Assay Using EB3
- the results of a proliferation assay using EB3 when rLm5 is used as a cell support material are shown.
- a maintenance medium for EB3 As a maintenance medium for EB3, a medium (KSR-GMEM) supplemented with 10% Knockout TM serum replacement additive (KSR) (Invitrogen) was used instead of the growth medium 10% FBS described in Example 2.
- KSR-GMEM a medium supplemented with 10% Knockout TM serum replacement additive
- FBS FBS described in Example 2.
- EB3 was seeded at 43000 cells / well in a 12-well plate (NUNC) treated with various extracellular matrix proteins whose concentrations were adjusted. After culturing at 37 ° C., 5% CO 2 , 95% air for 2 days, cells were collected by enzyme treatment, and the number of cells was counted with a hemocytometer.
- EB3 was seeded at 43,000 cells / well in a 12-well plate treated with rLm5 adjusted in concentration. By repeating this operation, the proliferation effect of rLm5 under each condition for EB3 was compared.
- rLm5 was obtained by adding 3.125 ⁇ g / ml rHSA to 2 ⁇ g / ml (L (2)), 0.2 ⁇ g / ml (L (0.2)), 0.2 ⁇ g / ml rLm5 (L (0 .2) + H (3.125)) and 0.2 ⁇ g / ml rLm5 plus 12.5 ⁇ g / ml rHSA (L (0.2) + H (12.5)).
- FIG. 23 shows the results of calculating how many times the theoretical growth finally occurred when EB3 was passaged 5 times under each culture condition. From the results of FIG. 23, in the experimental group in which rHSA was added to 0.2 ⁇ g / ml rLm5 compared to 0.2 ⁇ g / ml rLm5 alone, cell proliferation about 3 times was observed, and 2 ⁇ g / ml rLm5 was used. It was equivalent to the case.
- Example 8 Proliferation assay using EB3 and detection of undifferentiated marker
- the results of proliferation assay using EB3 and the results of detection of undifferentiated markers by RT-PCR when various cell support materials are used are shown. .
- the number of cells seeded in the proliferation assay of EB3 and the passage interval were the same as in Example 7.
- the growth medium (S) and KSR-GMEM (K) described in Example 2 were used for the growth assay.
- various extracellular matrix proteins treated in a 12-well plate were 1 mg / ml Gl, 0.05 ⁇ g / ml rLm5 (L0.05), 0.05 ⁇ g / ml rLm5 and 12.5 ⁇ g / ml rHSA. What was added (L0.05 + H12.5) was used.
- FIG. 24 shows the result of calculating how many times the theoretical growth finally occurred when EB3 was passaged three times under each culture condition. From the results shown in FIG. 24, growth was stopped in the middle only with 0.05 ⁇ g / ml rLm5, whereas growth was observed in the experimental group in which rHSA was added to 0.05 ⁇ g / ml rLm5.
- the denaturation reaction of each gene was performed at 94 ° C. for 30 seconds, the annealing reaction for 30 seconds, and the extension reaction at 72 ° C. for 20 seconds.
- the annealing reaction was performed at a temperature of 61 ° C for Oct4 and 54 ° C for Sox2 and Nanog.
- FIG. 25 shows the results of detection of undifferentiated markers by RT-PCR. From the result of FIG. 25, it was found that three undifferentiated markers were expressed in K + L (0.05) + H (12.5) as in S + Gl. This suggests that EB3 maintains undifferentiated properties even when rHSA is used in combination with rLm5.
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Abstract
Description
ラミニン5(カリニン、エピリグリン、ナイセイン、ラドシンとも呼ばれる)はα3鎖、β3鎖、γ2鎖からなるラミニンアイソフォームの一つであり、複数の研究機関で別々の経緯で発見された(J. Cell Biol.114, 567-576,1991;Cell 65,599-610,1991;J. Invest Dermatol.101,738-743,1993;Proc.Natl.Acad.Sci.USA.90,11767-11771,1993)。
[態様1]
ラミニン5を含んだ系で細胞を培養する方法において、
血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチドを培養系に含むことを特徴とする前記方法。
[態様2]
腫瘍壊死因子(TNF)ファミリーに属するタンパク質が、受容体活性化因子NF(Bリガンド(RANKL)である、態様1に記載の方法。
[態様3]
ペプトンが、綿実由来ペプトン、大豆由来ペプトン、小麦由来ペプトン及びエンドウ豆由来ペプトンからなる群から選択される、態様1に記載の方法。
[態様4]
細胞培養容器を、ポリペプチドで処理した後にラミニン5で処理する、あるいは、ポリペプチドとラミニンで同時に処理する、態様1ないし3のいずれか1項に記載の方法。
[態様5]
細胞接着活性、細胞分散活性、創傷治癒活性、増殖促進活性、未分化維持活性及び多能性維持活性からなる群から選択される、ラミニン5の細胞に対する活性が上昇する、態様1ないし4のいずれか1項に記載の方法。
[態様6]
細胞が、多能性幹細胞、組織幹細胞、体細胞、生殖細胞、及び肉腫細胞からなる群から選択される、態様1ないし5のいずれか1項に記載の方法。
[態様7]
多能性幹細胞が、胚性幹細胞、人工多能性幹細胞、胚性生殖細胞、又は生殖幹細胞から選択され;
組織幹細胞が、間葉系幹細胞、肝幹細胞、膵幹細胞、神経幹細胞、皮膚幹細胞、又は造血幹細胞から選択され;あるいは、
体細胞が、肝細胞、膵細胞、筋細胞、骨細胞、骨芽細胞、破骨細胞、軟骨細胞、脂肪細胞、皮膚細胞、繊維芽細胞、膵細胞、腎細胞、肺細胞、又は、リンパ球、赤血球、白血球、単球、マクロファージ若しくは巨核球の血球細胞から選択される、
態様6に記載の方法。
[態様8]
細胞が、マウス、ラット及びヒトからなる群から選択される種に由来する、態様1ないし5のいずれか1項に記載の方法。
[態様9]
ポリペプチドを1μg/mlないし200μg/mlの間の濃度で使用する、態様1ないし8のいずれか1項に記載の方法。
[態様10]
ポリペプチドを3.125μg/mlないし12.5μg/mlの間の濃度で使用する、態様1ないし8のいずれか1項に記載の方法。
[態様11]
2種類以上のポリペプチドを細胞培養系に含ませる、態様1ないし8のいずれか1項に記載の方法。
[態様12]
血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチド
を含む、ラミニン5を含んだ系で細胞を培養する方法に使用するための組成物。
[態様13]
さらにラミニン5を含む、態様12に記載の組成物。
[態様14]
血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチド
を含む、ラミニン5を含んだ系で細胞を培養する方法に使用するための、キット。
[態様15]
さらにラミニン5を含む、態様14に記載のキット。
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+HSA 0.78125μg/ml
白三角印、 組換えヒトラミニン5+HSA 3.125μg/ml
バツ印、 組換えヒトラミニン5+HSA 12.5μg/ml
図3B
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+HSA 12.5μg/ml
白三角印、 組換えヒトラミニン5+HSA 50μg/ml
バツ印、 組換えヒトラミニン5+HSA 200μg/ml
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+rHSA 0.78125μg/ml
白三角印、 組換えヒトラミニン5+rHSA 3.125μg/ml
バツ印、 組換えヒトラミニン5+rHSA 12.5μg/ml
図4B
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+rHSA 12.5μg/ml
白三角印、 組換えヒトラミニン5+rHSA 50μg/ml
バツ印、 組換えヒトラミニン5+rHSA 200μg/ml
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+HSA 10μg/ml
白三角印、 組換えヒトラミニン5+Gel 10μg/ml
図5B
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+HSA 12.5μg/ml
白三角印、 組換えヒトラミニン5+sRANKL 50μg/ml
図5C
黒菱形印、 組換えヒトラミニン5のみ
白四角印、 組換えヒトラミニン5+HSA 10μg/ml
白三角印、 組換えヒトラミニン5+Pep 10μg/ml
白菱形印、 組換えヒトラミニン5+Pep 15.6μg/ml
黒四角印、 組換えヒトラミニン5+Pep 62.5μg/ml
白四角印、 組換えヒトラミニン5+Pep 250μg/ml
白三角印、 組換えヒトラミニン5+Pep 1000μg/ml
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+HSA 10μg/ml
白三角印、 組換えヒトラミニン5+グリシン(Gly) 10μg/ml
薄黒三角印、 組換えヒトラミニン5+Gly 100μg/ml
黒三角印、 組換えヒトラミニン5+Gly 1000μg/ml
図9B
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+HSA 10μg/ml
白三角印、 組換えヒトラミニン5+アルギニン(Arg) 10μg/ml
薄黒三角印、 組換えヒトラミニン5+Arg 100μg/ml
黒三角印、 組換えヒトラミニン5+Arg 1000μg/ml
白四角印、 細胞培養プレートをrHSAで処理した後にrLm5で処理(rHSA→rLm5)
白三角印、 細胞培養プレートをrHSAとrLm5で同時に処理(rLm5+rHSA)
バツ印、 細胞培養プレートをrLm5で処理した後にrHSAで処理(rLm5→rHSA)
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+rHSA 0.78125μg/ml
白三角印、 組換えヒトラミニン5+rHSA 3.125μg/ml
バツ印、 組換えヒトラミニン5+rHSA 12.5μg/ml
図12B
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+rHSA 12.5μg/ml
白三角印、 組換えヒトラミニン5+rHSA 50μg/ml
バツ印、 組換えヒトラミニン5+rHSA 200μg/ml
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+rHSA 0.78125μg/ml
白三角印、 組換えヒトラミニン5+rHSA 3.125μg/ml
バツ印、 組換えヒトラミニン5+rHSA 12.5μg/ml
図13B
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+rHSA 12.5μg/ml
白三角印、 組換えヒトラミニン5+rHSA 50μg/ml
バツ印、 組換えヒトラミニン5+rHSA 200μg/ml
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+rHSA 0.78125μg/ml
白三角印、 組換えヒトラミニン5+rHSA 3.125μg/ml
バツ印、 組換えヒトラミニン5+rHSA 12.5μg/ml
図14B
黒菱形印、 組換えヒトラミニン5のみ(対照)
白四角印、 組換えヒトラミニン5+rHSA 12.5μg/ml
白三角印、 組換えヒトラミニン5+rHSA 50μg/ml
バツ印、 組換えヒトラミニン5+rHSA 200μg/ml
白菱形印、 組換えヒトラミニン5+HSA 10μg/ml
黒菱形印、 組換えヒトラミニン5のみ(対照)
白菱形印、 組換えヒトラミニン5+rHSA 10μg/ml
黒丸印、 Vnのみ(対照)
白丸印、 Vn+rHSA 10μg/ml
図17B
黒菱形印、 組換えヒトラミニン5のみ(対照)
白菱形印、 組換えヒトラミニン5+rHSA 10μg/ml
黒四角印、 Lm2のみ(対照)
白四角印、 Lm2+rHSA 10μg/ml
白四角印、 Panexin添加(P)
黒三角印、 P/rLm5 1μg/ml
白三角印、 P+F(bFGF)/コートなし
白丸印、 P+F/rLm5 1μg/ml
白菱形印、 P+F/rLm5 0.2μg/ml
黒四角印、 P+F/rLm5 0.2μg/ml+rHSA 10μg/ml
黒四角印、 Lm5(0.2μg/ml)+rHSA 12.5μg/ml
薄黒四角印、 Lm5(0.2μg/ml)+rHSA 3.125μg/ml
白四角印、 Lm5(0.2μg/ml)
黒四角印、 KSR-GMEM(K)+Lm5(L)(0.05μg/ml)+rHSA(H) 12.5μg/ml)
白四角印、 KSR-GMEM(K)+Lm5(L)(0.05μg/ml)
血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチドを培養系に含むことを特徴とする。
本発明の方法は、多能性幹細胞の培養にあたり、ラミニン5を含んだ系で該多能性幹細胞を培養することを、最も顕著な特徴とする。
本発明は、細胞培養において、Lm5を含む細胞培養系において、特定のポリペプチドを併せて使用することにより、種々のLm5の活性を上昇させることを特徴とする。
本発明においては、好ましくは、血中タンパク質、より好ましくは、細胞外マトリックスタンパク質以外の血中タンパク質をラミニン5タンパク質とともに使用する。
ゼラチンとは、動物の皮膚や骨、腱などの結合組織の主成分であるコラーゲンに熱を加えて抽出したもので、タンパク質を主成分とする。
「腫瘍壊死因子(Tumor Necrosis Factor、TNF)」は、サイトカインの一種であり、狭義にはTNFはTNF-α、TNF-β(リンホトキシン(LT)-α)およびLT-βの3種類である。「TNFファミリーに属するタンパク質」には、受容体活性化因子NFkBリガンド(RANKL)、Fasリガンド、CD40リガンド等の少なくとも19種類以上の分子が含まれる。
「ペプトン」とは、タンパク質をタンパク質分解酵素で分解したものである。生体内ではタンパク質が胃でペプシンにより消化されてペプトンとなり、膵臓で分泌される膵液や空腸で分泌される腸液によりさらにアミノ酸まで消化される。
本発明の方法において培養される細胞の種類、由来は特に限定されない。
本発明においては、ラミニン5を含んだ系で細胞を培養する。本発明で「ラミニン5を含んだ系」とは、細胞の培養システム中に何らかの形でラミニン5を含むことを意味するものであり、その態様は特に限定されない。
本発明において、ポリペプチドの使用量は特に限定されない。当業者は使用するポリペプチドの種類等に要素に応じて適切な量を適宜選択することが可能である。
本発明の好ましい1態様において、2種類以上のポリペプチドを細胞培養系に含ませる。実施例1において、ポリペプチドとしてrHSAとIgGを併用すると、各々を単独で使用した場合では大きな効果が確認できないくらいの低濃度(0.25μg/ml)であっても、両者を併用することにより、rHSA 10μg/mlを使用した場合と同程度の強い接着活性上昇効果が認められた。よって2種以上のポリペプチドの併用により相加効果ではなく、相乗効果が得られると考えられる。
本発明において、ラミニン5タンパク質が細胞培養において奏する種々の活性が、ポリペプチドとの併用において上昇される。限定されるわけではないが、ラミニン5タンパク質の効果としては、細胞接着活性、細胞分散活性、創傷治癒活性、増殖促進活性、未分化維持活性及び多能性維持活性が含まれる。
本実施例では、公知の方法に従って組み換えヒトラミニン5タンパク質を調製した。
本実施例では、各種細胞に対するrLm5およびrLm5に添加物を加えた際の接着アッセイの結果を示す。
本実施例では、ヒトビトロネクチン(Vn/SIGMA)、ヒトラミニン2(Lm2/Millipore)を用いて、他の細胞外マトリックスタンパク質やラミニンアイソフォームにもrLm5と同様の活性上昇作用が認められるかをラット肝細胞株(BRL)を用いた接着アッセイにて検討した結果を示す。アッセイは実施例2記載の方法に準じて行った。
本実施例では、ラット肝細胞株(BRL)細胞に対するrLm5およびrLm5に添加物を加えた際の細胞分散アッセイの結果を示す。BRLは横浜市立大学大学院 生命ナノシステム科学研究科 ゲノムシステム科学専攻から提供を受けた。
本実施例では、ラット肝細胞株(BRL)細胞に対するrLm5およびrLm5に添加物を加えた際の創傷治癒アッセイの結果を示す。BRLは横浜市立大学大学院 生命ナノシステム科学研究科 ゲノムシステム科学専攻から提供を受けた。
本実施例では、各種細胞支持材料を使用した場合におけるhMSCを用いた増殖アッセイの結果を示す。
本実施例では、rLm5を細胞支持材料として用いた場合におけるEB3を用いた増殖アッセイの結果を示す。
本実施例では、各種細胞支持材料を使用した場合におけるEB3を用いた増殖アッセイの結果とRT-PCRによる未分化マーカーの検出結果を示す。
配列番号1は、ヒトラミニンα3鎖の塩基配列を示す。
<配列番号2>
配列番号2は、ヒトラミニンα3鎖のアミノ酸配列を示す。
<配列番号3>
配列番号3は、ヒトラミニンβ3鎖の塩基配列を示す。
<配列番号4>
配列番号4は、ヒトラミニンβ3鎖のアミノ酸配列を示す。
<配列番号5>
配列番号5は、ヒトラミニンγ2鎖の塩基配列を示す。
<配列番号6>
配列番号6は、ヒトラミニンγ2鎖のアミノ酸配列を示す。
<配列番号7-14>
配列番号7-14は、EB3細胞における未分化マーカー検出のための、RT-PCR用プライマーの塩基配列を示す。
Claims (15)
- ラミニン5を含んだ系で細胞を培養する方法において、
血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチドを培養系に含むことを特徴とする前記方法。 - 腫瘍壊死因子(TNF)ファミリーに属するタンパク質が、受容体活性化因子NF(Bリガンド(RANKL)である、請求項1に記載の方法。
- ペプトンが、綿実由来ペプトン、大豆由来ペプトン、小麦由来ペプトン及びエンドウ豆由来ペプトンからなる群から選択される、請求項1に記載の方法。
- 細胞培養容器を、ポリペプチドで処理した後にラミニン5で処理する、あるいは、ポリペプチドとラミニンで同時に処理する、請求項1ないし3のいずれか1項に記載の方法。
- 細胞接着活性、細胞分散活性、創傷治癒活性、増殖促進活性、未分化維持活性及び多能性維持活性からなる群から選択される、ラミニン5の細胞に対する活性が上昇する、請求項1ないし4のいずれか1項に記載の方法。
- 細胞が、多能性幹細胞、組織幹細胞、体細胞、生殖細胞、及び肉腫細胞からなる群から選択される、請求項1ないし5のいずれか1項に記載の方法。
- 多能性幹細胞が、胚性幹細胞、人工多能性幹細胞、胚性生殖細胞、又は生殖幹細胞から選択され;
組織幹細胞が、間葉系幹細胞、肝幹細胞、膵幹細胞、神経幹細胞、皮膚幹細胞、又は造血幹細胞から選択され;あるいは、
体細胞が、肝細胞、膵細胞、筋細胞、骨細胞、骨芽細胞、破骨細胞、軟骨細胞、脂肪細胞、皮膚細胞、繊維芽細胞、膵細胞、腎細胞、肺細胞、又は、リンパ球、赤血球、白血球、単球、マクロファージ若しくは巨核球の血球細胞から選択される、
請求項6に記載の方法。 - 細胞が、マウス、ラット及びヒトからなる群から選択される種に由来する、請求項1ないし5のいずれか1項に記載の方法。
- ポリペプチドを1μg/mlないし200μg/mlの間の濃度で使用する、請求項1ないし8のいずれか1項に記載の方法。
- ポリペプチドを3.125μg/mlないし12.5μg/mlの間の濃度で使用する、請求項1ないし8のいずれか1項に記載の方法。
- 2種類以上のポリペプチドを細胞培養系に含ませる、請求項1ないし8のいずれか1項に記載の方法。
- 血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチド
を含む、ラミニン5を含んだ系で細胞を培養する方法に使用するための組成物。 - さらにラミニン5を含む、請求項12に記載の組成物。
- 血清、血清アルブミン、プレアルブミン、免疫グロブリン、α-グロブリン、β-グロブリン、α1-アンチトリプシン(α1-AT)、へプトグロビン(Hp)、α2-マクログロブリン(α2-M)、α-フェトプロテイン(AFP)、トランスフェリン、レチノール結合タンパク(RBP)又はアディポネクチンである細胞外マトリックスタンパク質以外の血中タンパク質、並びに、ゼラチン、腫瘍壊死因子(TNF)ファミリーに属するタンパク質、ペプトン、からなるグループから選択されるポリペプチド
を含む、ラミニン5を含んだ系で細胞を培養する方法に使用するための、キット。 - さらにラミニン5を含む、請求項14に記載のキット。
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CA2795031A CA2795031A1 (en) | 2010-03-31 | 2011-03-31 | Method for culturing cells in a system comprising laminin-5 |
EP11765760.1A EP2554658A4 (en) | 2010-03-31 | 2011-03-31 | METHOD FOR CELL CULTURE IN A SYSTEM COMPRISING LAMININ-5 |
US13/638,172 US20130164839A1 (en) | 2010-03-31 | 2011-03-31 | Method for culturing cells in a system comprising laminin-5 |
JP2012509584A JP5882198B2 (ja) | 2010-03-31 | 2011-03-31 | ラミニン5を含んだ系で細胞を培養する方法 |
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- 2011-03-31 EP EP11765760.1A patent/EP2554658A4/en not_active Withdrawn
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- 2011-03-31 JP JP2012509584A patent/JP5882198B2/ja active Active
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JPWO2011125860A1 (ja) | 2013-07-11 |
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EP2554658A1 (en) | 2013-02-06 |
JP5882198B2 (ja) | 2016-03-09 |
US20130164839A1 (en) | 2013-06-27 |
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