WO2023149407A1 - 肺間葉細胞の製造方法および肺間葉細胞 - Google Patents
肺間葉細胞の製造方法および肺間葉細胞 Download PDFInfo
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- 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
- C12N5/06—Animal cells or tissues; Human cells or tissues
Definitions
- the present invention relates to a method for producing pulmonary mesenchymal cells and pulmonary mesenchymal cells.
- the alveolar organoids can be created by co-culturing lung progenitor cells derived from the pluripotent stem cells and human fetal fibroblasts (HFLF).
- HFLF human fetal fibroblasts
- Non-Patent Documents 1 and 2 Although HFLF is an allogeneic but not autologous cell, there is a problem of graft rejection when the resulting alveolar organoids are transplanted. In addition, HFLF is difficult to obtain and is ethically problematic because it is a fetal-derived cell.
- the present inventors developed a method of creating alveolar organoids without using the HFLF.
- type II alveolar epithelial cells are mainly induced, and the induction of type I alveolar epithelial cells is difficult. Therefore, it was suggested that HFLF is important as supporting cells in the creation of the alveolar organoids. Therefore, there is a need for a method of inducing mesenchymal cells that function as support cells, similar to HFLF.
- the present disclosure aims to provide a method for producing pulmonary mesenchymal cells that can be used as supporting cells in the induction of alveolar epithelial cells.
- the method for producing pulmonary mesenchymal cells of the present disclosure comprises culturing mesoderm cells in the presence of a mesenchymal cell inducer and KGF and FGF10 to induce differentiation into pulmonary mesenchymal cells. Including the step of inducing.
- the cell population containing mesenchymal cells of the present disclosure (hereinafter also referred to as "cell population”) contains lung mesenchymal cells expressing RSPO2 and/or RSPO3.
- the cell population containing mesenchymal cells of the present disclosure consists of FOXF1 (Forkhead box protein F1), TCF21 (Transcription factor 21), TBX4 (T-Box Transcription Factor 4), and OSR1 (Odd-Skipped Related Transcription Factor) Lung mesenchymal cells expressing at least one transcription factor selected from the group.
- FOXF1 Formhead box protein F1
- TCF21 Transcription factor 21
- TBX4 T-Box Transcription Factor 4
- OSR1 Odd-Skipped Related Transcription Factor
- the method for producing lung epithelial cells and/or airway epithelial cells of the present disclosure comprises culturing lung progenitor cells in the presence of pulmonary mesenchymal cells to obtain lung epithelial cells and/or A step of inducing differentiation into airway epithelial cells,
- the pulmonary mesenchymal cells are pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells of the present disclosure and/or a cell population containing the mesenchymal cells of the present disclosure.
- the pharmaceutical composition of the present disclosure contains pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells of the present disclosure and/or a cell population containing the mesenchymal cells of the present disclosure.
- FIG. 1 is a schematic diagram showing an outline of a method for inducing pulmonary mesenchymal cells and pulmonary progenitor cells and forming alveolar organoids in Example 1.
- FIG. 2 is a photograph showing a phase-contrast image and an Oil Red O-stained image showing the differentiated state of cells after culture in Example 1.
- FIG. 3 is a graph showing flow cytometry analysis in Example 1.
- FIG. 4 is a graph showing gene expression in cells at each culture stage in Example 1.
- FIG. 5 is a photograph showing a fluorescent image of cells on day 7 of culture in Example 1.
- FIG. 6 is a graph showing the results of examination of alveolar organoids in Example 1.
- FIG. 7 is photographs and graphs showing the expression of various cell markers in alveolar organoids in Example 1.
- FIG. 1 is a schematic diagram showing an outline of a method for inducing pulmonary mesenchymal cells and pulmonary progenitor cells and forming alveolar organoids in Example 1.
- FIG. 2 is a photograph
- FIG. 8 is a schematic diagram showing an overview of the assay system in Example 2.
- FIG. 9 shows the expression of iMES markers in Example 2.
- FIG. 10 is a diagram relating to the ability to form organoids in Example 2.
- FIG. 11 shows the results of RNA-Seq analysis in Example 2.
- FIG. 12 is a diagram showing relative expression levels of Wnt ligands in Example 2.
- FIG. 13 is a diagram showing the culture method and analysis results of SFTPC-GFP-positive cells in Example 2.
- FIG. 14 is a diagram showing the results of cluster analysis of each mesenchymal cell in Example 2.
- FIG. 15 is a diagram showing the results of passage of type II alveolar epithelial cells in Example 3.
- FIG. 16 shows the results of cluster analysis of scRNA-seq analysis in Example 4.
- FIG. 17 shows results showing ligand-receptor interactions in Example 4.
- FIG. 18 is a graph showing the results of SFTPC-GFP-positive cells/EPCAM-positive cells in
- marker means a nucleic acid, gene, polypeptide, or protein that is expressed to different extents in cells of interest. If said marker is a positive marker, said different degree means increased expression compared to undifferentiated cells. When said marker is a negative marker, said different degree means reduced expression compared to undifferentiated cells.
- positive (+) means that the cell expresses a detectable marker.
- the “positive (+)” is typically detected by an analysis method such as flow cytometry using an antigen-antibody reaction, using a negative control cell that does not express the antigen or an antibody that does not react with the antigen. Means that a higher signal is detected compared to the negative control reaction.
- the above-mentioned “express” means that the expression level of the marker gene in the reference sample and the marker gene in the target sample is compared by RT-PCR or the like, and the increase in the expression level of the marker gene is found in the target sample.
- the expression level is the expression level corrected by an internal standard gene (eg, ⁇ -actin gene).
- the reference sample can be induced pluripotent stem cells (iPS cells).
- negative (-) means that the cell does not express a detectable marker.
- the “negative (-)” is typically determined using negative control cells that do not express the antigen or an antibody that does not react with the antigen by an analysis method such as flow cytometry that is detected using an antigen-antibody reaction. Means that an equal or lesser signal is detected compared to the negative control reaction.
- the “not expressed” means that the expression level of the marker gene in the reference sample and the marker gene in the target sample is compared by RT-PCR or the like, and the expression level of the marker gene is decreased in the target sample. means to be seen The expression level is the expression level corrected by an internal standard gene (eg, ⁇ -actin gene).
- the reference sample can be induced pluripotent stem cells (iPS cells).
- pluripotent cells mean cells that have the potential to differentiate into ectoderm, mesoderm, and endoderm cells. When the pluripotent cells have self-renewal ability, the pluripotent cells can also be called pluripotent stem cells.
- mesoderm cells are destined to have the ability to differentiate into connective tissue such as bone, cartilage, blood vessels, and lymphatic vessels; muscle tissue; express mesodermal cell markers such as NCAM (neural cell adhesion molecule), PDGFR ⁇ (Platelet Derived Growth Factor Receptor ⁇ ), KDR (Kinase Insert Domain Receptor), ISL1, NKX2-5 and/or OSR1 cells, preferably cells expressing NCAM, PDGFR ⁇ , and/or KDR, and more preferably cells expressing NCAM and/or PDGFR ⁇ .
- NCAM neural cell adhesion molecule
- PDGFR ⁇ Platinum Derived Growth Factor Receptor ⁇
- KDR Kinase Insert Domain Receptor
- ISL1, NKX2-5 and/or OSR1 cells preferably cells expressing NCAM, PDGFR ⁇ , and/or KDR, and more preferably cells expressing NCAM and/or PDGFR ⁇ .
- endodermal cells (definitive endoderm: DE), if there is a developmentally appropriate stimulation, thymus; digestive organs such as the stomach, intestines and liver; respiratory organs such as the trachea, bronchi and lungs; and urinary organs such as bladder and urethra; mean cells that are destined to have differentiation potential and express SOX17 (SRY (sex determining region Y)-box 17) and FOXA2 (Forkhead box protein A2) are cells.
- SOX17 SRY (sex determining region Y)-box 17)
- FOXA2 Formhead box protein A2
- anterior foregut endoderm cells are, if there is an embryologically appropriate stimulus, the thymus; It means cells that are destined to have the potential to differentiate into respiratory organs such as, and are cells that express SOX2, SOX17, and FOXA2.
- ventral anterior foregut endoderm (also called ventral anterior foregut cell) is an embryologically appropriate stimulus to the thyroid and lungs. It refers to cells that are destined to have differentiation potential, and are cells that express NKX2.1, GATA6 (GATA-binding factor 6), and HOPX (homeodomain-only protein).
- mesenchymal cells are cells derived from mesodermal cells, and have the ability to differentiate into connective tissues such as bone, cartilage, blood vessels, and lymphatics when given developmentally appropriate stimulation.
- VIM Vehiclein
- THY1 Thy-1 Cell Surface Antigen, CD90
- PDGFR ⁇ PDGFR ⁇
- COL1A1 Collagen Type I Alpha 1 Chain
- NCAM NCAM
- KDR KDR
- leaf cell markers preferably cells expressing VIM, THY1, and/or COL1A1.
- the mesenchyme is also called mesenchyme. Therefore, the mesenchymal cells are also called mesenchymal cells.
- pulmonary mesenchymal cells are mesoderm-derived cells that, upon developmentally appropriate stimulation, are destined to have the potential to differentiate into connective tissue of the lung. means, in addition to the mesenchymal cell markers, FOXF1 (Forkhead box protein F1), TCF21 (Transcription factor 21) and / or TBX4 (T-Box Transcription Factor 4) is a cell expressing.
- FOXF1 Formhead box protein F1
- TCF21 Transcription factor 21
- TBX4 T-Box Transcription Factor 4
- the pulmonary mesenchymal cells are fibroblast markers (e.g., NCAM (neural cell adhesion molecule), ADRP (Adipose differentiation-related protein), and/or COL1A1 (Collagen, type I, alpha 1), and ACTA2 (actin alpha 2), etc.), the pulmonary mesenchymal cells can also be referred to as pulmonary fibroblasts.
- NCAM neural cell adhesion molecule
- ADRP Adipose differentiation-related protein
- COL1A1 Collagen, type I, alpha 1
- ACTA2 actin alpha 2
- pulmonary progenitor cells refer to cells that are committed to have the potential to differentiate into alveolar epithelial cells and/or airway epithelial cells upon developmentally appropriate stimulation.
- the lung progenitor cells are carboxypeptidase M (CPM), NK2 homeobox 1 (NKX2.1 or NKX2-1), SRY-box 9 (SRY (sex determining region Y)-box 9, SOX9), SRY- Cells expressing box 2 (SRY (sex determining region Y)-box 2, SOX2) and/or forkhead box protein 2A (FOXA2).
- the lung progenitor cells are preferably CPM and/or NKX2.1 positive cells.
- alveolar epithelial cells mean epithelial cells present in the alveoli of the lung.
- examples of the alveolar epithelial cells include type I alveolar epithelial cells and/or type II alveolar epithelial progenitor cells.
- type I alveolar epithelial cells means epithelial cells having a histologically flattened shape, PDPN (Podoplanin), AGER (Advanced Glycosylation End-Product Specific Receptor), CAV1 ( Caveolin 1), HOPX (HOP Homeobox), and/or AQP5 (Aquaporin 5) expressing cells.
- type II alveolar epithelial cells means epithelial cells that produce pulmonary surfactant proteins such as SFTPC (Surfactant protein C) and SFTPB (Surfactant protein B).
- SFTPC Sudfactant protein C
- SFTPB Sudfactant protein B
- ABCA3 ATP-binding cassette sub-family A member 3
- DCLAMP Lisosome-associated membrane glycoprotein 3
- SLC34A2 Sodium-dependent phosphate transport protein 2B
- a "cell population” means a collection of cells containing desired cells and composed of one or more cells.
- the ratio of desired cells to all cells also referred to as “purity”
- the purity is, for example, the percentage in viable cells.
- the purity can be measured, for example, by flow cytometry, immunohistochemistry, in situ hybridization, RT-PCR, single cell analysis, and the like.
- Desired cell purity in the cell population is, for example, 5% or more, 10% or more, 20% or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more % or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more , or greater than or equal to 99%.
- isolated refers to identified and separated, or identified and separated and/or identified and recovered from a component in its natural state, or It means the state recovered from the ingredients in their natural state. Said “isolation” can be carried out, for example, by obtaining at least one purification step.
- enrichment means increasing the content ratio of target cells compared to the state before treatment, or a state in which the content ratio is increased. Said enrichment can also be referred to as enrichment. Said enrichment does not comprise, for example, culturing.
- protein or “polypeptide” means a polymer composed of unmodified amino acids (natural amino acids), modified amino acids, and/or artificial amino acids.
- nucleic acid molecule or “nucleic acid” means a polymer of deoxyribonucleotides (DNA), ribonucleotides (RNA), and/or modified nucleotides.
- the nucleic acid molecule may be a single-stranded nucleic acid molecule or a double-stranded nucleic acid molecule.
- subject means an animal or an animal-derived cell, tissue, or organ. In particular, it is used in the sense of including humans. Said animal means both human and non-human animals. Examples of non-human animals include mammals such as mice, rats, rabbits, dogs, cats, cows, horses, pigs, monkeys, dolphins, and sea lions.
- treatment means therapeutic treatment and/or prophylactic treatment.
- treatment means treating, curing, preventing, arresting, ameliorating, ameliorating a disease, condition, or disorder, or halting, arresting, reducing, or delaying the progression of a disease, condition, or disorder. do.
- prevention means reducing the likelihood of developing a disease or condition or delaying the onset of a disease or condition.
- the “treatment” may be, for example, treatment of a patient who develops the target disease, or treatment of a model animal of the target disease.
- sequence information of the proteins described herein or the nucleic acids (eg, DNA or RNA) encoding them are available from Protein Data Bank, UniPort, Genbank, or the like.
- the present disclosure provides methods of producing pulmonary mesenchymal cells or pulmonary mesenchymal cells that can be used to form alveolar organoids.
- the method for producing pulmonary mesenchymal cells of the present disclosure includes the step of culturing mesodermal cells in the presence of a mesenchymal cell inducer and KGF and/or FGF10 to induce differentiation into pulmonary mesenchymal cells. .
- pulmonary mesenchymal cells that can be used to form alveolar organoids can be provided.
- the alveolar organoids include, for example, type I alveolar epithelial cells, type II alveoli Includes airway epithelial cells such as epithelial cells and airway ciliated epithelial cells. Therefore, according to the method for producing pulmonary mesenchymal cells of the present disclosure, for example, pulmonary mesenchymal cells can be provided as supporting cells that can replace HFLF.
- the mesoderm cells used for inducing the pulmonary mesenchymal cells can be derived, for example, from pluripotent cells. Therefore, the method for producing lung mesenchymal cells of the present disclosure may induce differentiation of the mesodermal cells from the pluripotent cells prior to the induction of the lung mesenchymal cells from the mesodermal cells.
- the method for producing pulmonary mesenchymal cells of the present disclosure includes, for example, the step of culturing pluripotent cells in the presence of a mesoderm-inducing factor to induce differentiation into the mesoderm cells (first induction process).
- the pluripotent cells are cultured in a medium containing the mesoderm-inducing factor to differentiate into cells that express the mesoderm cell marker, i.e., mesoderm cells. That is, the pluripotent cells and the mesoderm-inducing factors are brought into contact and cultured to differentiate into mesoderm cells. See, for example, References 1-4 below for the induction of said mesoderm cells from said pluripotent cells.
- the mesoderm inducer by culturing using a GSK3 ⁇ inhibitor, activin A, and / or BMP4, from the pluripotent cells to the medium It can induce germ layer cells.
- one type of the mesoderm-inducing factor may be used, or a plurality of types may be used.
- said mesoderm-inducing factor is preferably said GSK3 ⁇ inhibitor.
- the mesoderm-inducing factor is, for example, a combination of the GSK3 ⁇ inhibitor, the activin A, and/or BMP4; the GSK3 ⁇ inhibitor, and the activin A, and combinations of said BMP4;
- the mesoderm-inducing factor is a peptide or protein
- the mesoderm-inducing factor is, for example, a peptide or protein derived from an animal species different from or the same as the animal species from which the pluripotent cells are derived.
- Lefty may be used instead of Activin A.
- BMP2, BMP6 and/or BMP7 may be used instead of BMP4.
- Reference 1 Han, L., Chaturvedi et al. “Single cell transcriptomics identifies a signaling network coordinating endoderm and mesoderm diversification during foregut organogenesis.” Nat Commun, 2020, 11, 4158.
- Reference 2 Kishimoto, K. et al, “Bidirectional Wnt signaling between endoderm and mesoderm confers tracheal identity in mouse and human cells.” Nat Commun, 2020, 11, 4159.
- Reference 3 Loh, KM et al., “Mapping the Pairwise Choices Leading from Pluripotency to Human Bone, Heart, and Other Mesoderm Cell Types.” Cell, 2016, 166, 451-467.
- Reference 4 Xi, H. et al. “In Vivo Human Somitogenesis Guides Somite Development from hPSCs.” Cell Rep, 2017, 18, 1573-1585.
- the pluripotent cells include, for example, induced pluripotent stem cells (iPS cells), totipotent stem cells such as embryonic stem cells (ES cells); hematopoietic stem cells, neural stem cells, mesenchymal stem cells and the like pluripotent stem cells such as tissue stem cells or somatic stem cells;
- iPS cells induced pluripotent stem cells
- ES cells embryonic stem cells
- hematopoietic stem cells hematopoietic stem cells
- neural stem cells mesenchymal stem cells and the like pluripotent stem cells
- tissue stem cells or somatic stem cells pluripotent stem cells
- ES cells for example, human embryonic stem cell lines such as H1, H7, and H9 (available from WiCell Research Institute) can be used.
- the ES cells may be prepared, for example, by culturing cell masses isolated from animal blastocysts.
- reference document 5 below can be referred to for the method of inducing the ES cells.
- Reference 5 Thomson JA et al., "Embryonic stem cell lines derived from human blastocysts.”, Science, 1998, vol. 282, pages 1145-1147
- iPS cells As the iPS cells, 201B7 (available from RIKEN BRC), 604A1 (available from iPS Research Institute, Kyoto University), etc. can be used.
- the iPS cells can be prepared, for example, by introducing reprogramming factors into target cells.
- the reprogramming factors are, for example, Oct3/4, Sox2, Sox1, Sox3, Sox15, Sox17, Klf4, Klf2, c-Myc, N-Myc, L-Myc, Nanog, Lin28, Fbx15, ERAs, ECAT15-2, Tcl1, beta-catenin, Lin28b, Sall1, Sall4, Esrrb, Nr5a2, Tbx3, Glis1 and the like, and specific examples include combinations of Oct3/4, Sox2, Klf4, L-Myc, and Lin28.
- the GSK3 ⁇ inhibitor may be any substance that inhibits the kinase activity of the GSK3 ⁇ protein (for example, the ability to phosphorylate ⁇ -catenin).
- BIO GSK-3 ⁇ inhibitor IX: 6-bromoindirubin '-oxime
- SB216763 (3-(2,4-dichlorophenyl)-4-(1-methyl-1H-indol-3-yl)-1H-pyrrole-2,5-dione
- SB415286 Maleimide derivatives such as 3-[(3-chloro-4-hydroxyphenyl)amino]-4-(2-nitrophenyl)-1H-pyrrole-2,5-dione
- SK-3 ⁇ inhibitor VII (4-dibromo Acetophenone) and other phenyl ⁇ -bromomethyl ketone compounds
- cell membrane-permeable phosphorylated peptides such as L803-mts (GSK-3 ⁇ peptide inhibitor; (2,4-Dichloroph
- Activin A is a protein (SEQ ID NO: 49) encoded by a polynucleotide registered with NCBI under accession number NM_002192.
- the activin A may be a functional equivalent of the activin A.
- the functional equivalent is a substance capable of activating SMAD2/3 signaling via activin receptors (ACVR1/2) like activin A.
- Examples of functional equivalents of activin A include Nodal and Lefty.
- the BMP4 is a protein encoded by a polynucleotide registered with NCBI under accession numbers NM_001202, NM_001347914, NM_001347916, NM_130850, or NM_130851.
- An example of the BMP4 is a protein consisting of the amino acid sequence of SEQ ID NO: 50 below.
- BMP4 (SEQ ID NO: 50) MIPGNRMLMVVLLCQVLLGGASHASLIPETGKKKVAEIQGHAGGRRSGQSHELLRDFEATLLQMFGLRRRPQPSKSAVIPDYMRDLYRLQSGEEEEEQIHSTGLEYPERPASRANTVRSFHHEEHLENIPGTSENSAFRFLFNLSSIPENEVISSAELRLFREQVDQGPDWERGFHRINIYEVMKPPAEVVPGHLITRLLDTRLVHHNVTRWETFDVSPA VLRWTREKQPNYGLAIEVTHLHQTRTHQGQHVRISRSLPQGSGNWAQLRPLLVTFGHDGRGHALTRRRRAKRSPKHHSQRARKKNKNCRRHSLYVDFSDVGWNDWIVAPPGYQAFYCHGDCPFPLADHLNSTNHAIVQTLVNSVNSSIPKACCVPTELSAISMLYLDEYDKVVLKNYQEMVVEGCGCR
- the BMP4 may be a functional equivalent of the BMP4.
- the functional equivalent is a substance capable of activating SMAD1/5/8 signaling via BMP receptors (BMPR1/2) like BMP4.
- Examples of functional equivalents of BMP4 include BMP2, BMP6, and BMP7.
- the concentration of the mesoderm-inducing factor in the first induction step is not particularly limited as long as it is an effective concentration at which each factor exhibits the activity of inducing mesoderm cells.
- the concentration of CHIR99021 in the medium is, for example, 0.1 to 20 ⁇ mol/l.
- activin A is used as the mesoderm-inducing factor
- the concentration of activin A in the medium is, for example, 1-100 ng/ml.
- BMP4 is used as the mesoderm inducer
- the concentration of BMP4 in the medium is 1-100 ng/ml.
- the medium can be prepared using a medium used for culturing animal cells as a basal medium.
- the basal medium is, for example, IMDM medium, Medium199 medium, Eagle's Minimum Essential Medium (EMEM) medium, ⁇ MEM medium, Dulbecco's modified Eagle's Medium (DMEM) medium, Ham's F12 medium, RPMI1640 medium, Fischer's medium, Neurobasal Medium (Thermo Fisher Scientific company), stem cell culture medium (e.g., mTeSR-1 (manufactured by STEMCELL Technologies), TeSR-E8 (manufactured by STEMCELL Technologies), CDM-PVA, StemPRO hESC SFM (manufactured by Life Technologies), E8 (manufactured by Life Technologies )) and their mixed media.
- IMDM medium Medium199 medium
- EMEM Eagle's Minimum Essential Medium
- DMEM Dulbecco's modified Eagle's Medium
- Ham's F12 medium RPMI1640 medium
- the medium may be serum-supplemented or serum-free.
- the medium includes, for example, albumin, transferrin, Knockout Serum Replacement (KSR) (serum replacement for ES cell culture), N2 supplement (manufactured by Invitrogen), B27 supplement (manufactured by Invitrogen), fatty acid, insulin, collagen precursor , trace elements, 2-mercaptoethanol, 3'-thiolglycerol and other serum replacements.
- the medium contains lipids, amino acids, L-glutamine, Glutamax (manufactured by Invitrogen), non-essential amino acids, vitamins, growth factors, low-molecular-weight compounds, antibiotics, antioxidants, pyruvic acid, buffers, inorganic salts, etc. may contain additives.
- the medium is preferably a stem cell culture medium supplemented with glutamic acid and antibiotics.
- the culture period in the first induction step may be any period during which the mesodermal cells can differentiate, for example, 1 to 7 days, 1 to 5 days, or 2 to 4 days.
- the culture conditions in the first induction step for example, normal conditions for cell culture can be adopted.
- the culture temperature is, for example, 25-40°C, 30-40°C, or about 37°C.
- the carbon dioxide concentration during culture is 1-10%, 3-7%, or about 5%.
- the culture is performed, for example, in a moist environment.
- the differentiation of the mesodermal cells can be detected, for example, by loss of expression of the mesodermal cell markers and/or loss of expression of the pluripotent cell markers.
- the mesoderm cell markers include, for example, NCAM, PDGFR ⁇ , KDR, ISL1, NKX2-5, and/or OSR1.
- Said mesodermal cell marker is preferably NCAM, PDGFR ⁇ and/or KDR, more preferably NCAM and/or PDGFR ⁇ , or NCAM and PDGFR ⁇ .
- Markers of pluripotent stem cells are, for example, ABCG2, Cripto, FOXD3, Connexin43, Connexin45, Oct4, Sox2, Nanog, hTERT, UTF1, ZFP42, SSEA-3, SSEA-4, TRA-1-60, TRA-1 -81 and the like.
- the content ratio (lower limit) of the mesoderm cells in the total cells (cell population) after the induction is, for example, 5% or more, 10% or more, based on the number of cells, 20% or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, 94% or less, 93% or less, 92%, based on the number of cells % or less, 91% or less, 90% or less, 85% or less, 80% or less, 75% or less, 70% or less, 65% or less, 60% or less, 55% or less, or 50% or less.
- the numerical range of the content ratio can be, for example, any combination of the lower limit and the upper limit.
- the content ratio when cultured for 3 days in the first induction step, the content ratio is, for example, 30 to 60%.
- the content ratio is lowered, for example, by shortening the number of culture days in the first induction step.
- the content ratio increases, for example, by lengthening the number of culture days in the first induction step.
- the mesoderm cells are cultured in the presence of a mesenchymal cell inducer and KGF and FGF10 to induce differentiation into pulmonary mesenchymal cells (second induction step).
- the mesoderm cells are cultured in a medium containing the mesenchymal cell inducer, and cells expressing the mesenchymal cell marker, i.e., pulmonary mesenchymal cells, etc. Differentiate into mesenchymal cells.
- mesenchymal cells are differentiated by culturing the mesenchymal cells in contact with the mesenchymal cell inducer.
- the mesenchymal cell inducer includes activin A, FGF2, BMP4, retinoic acid (RA), PDGFbb (platelet-derived growth factor bb), Wnt inducer and/or, said pulmonary mesenchymal cells can be induced from said mesoderm cells by culturing with a GSK3 ⁇ inhibitor and KGF (FGF7) and/or FGF10.
- the pulmonary mesenchymal cells can be induced by coexisting KGF and FGF10 in the mesenchymal cell induction method.
- References 6 and 7 below, for example, can be referred to for methods for inducing the mesenchymal cells.
- one type of mesenchymal cell-inducing factor may be used, or a plurality of types may be used.
- the mesenchymal cell inducer is preferably BMP4 or FGF2.
- the mesenchymal cell inducer is, for example, a combination of the activin A, the FGF2, and the BMP4; retinoic acid, BMP4, and a Wnt inhibitor; /or combinations of GSK3 ⁇ inhibitors (reference 6); combinations of FGF2 and PDGFbb (reference 7);
- the mesenchymal cell inducer is a peptide or protein
- the mesoderm inducer is, for example, a peptide or protein derived from an animal species different from or the same as the animal species from which the mesoderm cells are derived.
- KGF and FGF10 are, for example, peptides or proteins derived from animal species different from or the same as the animal species from which said mesoderm cells are derived.
- FGF1 may be used instead of FGF2.
- FGF3 and/or FGF22 may be used instead of KGF and FGF10 (references 8-9).
- the Wnt inhibitor and GSK3 ⁇ inhibitor can refer to the examples given below. Reference 6: Han, Lu et al. “Single cell transcriptomics identifies a signaling network coordinating endoderm and mesoderm diversification during foregut organogenesis.” Nature communications vol. 11,1 4158. 27 Aug.
- Reference 7 Takebe, Takanori et al. “Massive and Reproducible Production of Liver Buds Entirely from Human Pluripotent Stem Cells.” Cell reports vol. 21,10 (2017): 2661-2670. doi:10.1016/j.celrep.2017.11 .005
- Reference 8 Morichika Konishi, et al., “Regulation of biological functions by extracellular secretory factor FGF21,” Internet ⁇ https://seikagaku.jbsoc.or.jp/10.14952/SEIKAGAKU.2016.880086/index.html>
- Reference 9 Hui, Qi et al. “FGF Family: From Drug Development to Clinical Application.” International journal of molecular sciences vol. 19,7 1875. 26 Jun. 2018, doi:10.3390/ijms19071875
- the FGF2 is a protein (SEQ ID NO: 51 below) encoded by a polynucleotide registered with NCBI under accession number NM_002006.
- the FGF2 may be in an activated form after being cleaved by a protease.
- FGF2 (SEQ ID NO:51) MVGVGGGDVEDVTPRPGGCQISGRGARGCNGIPGAAAWEAALPRRRPRRHPSVNPRSRAAGSPRTRGRRTEERPSGSRLGDRGRGRALPGGRLGGRGRAPERVGGRGRGTAAPRAAPAARGSRPGPAGTMAAGSITTLPALPEDGGSGAFPPGHFKDPKRLYCKNGGFFLRIHPDGRVDGVREKSDPHIKLQLQAEERGVVSIKGVCANRYLAMKEDGRLLASKC VTDECFFFFERLESNNYNTYRSRKYTSWYVALKRTGQYKLGSKTGPGQKAILFLPMSAKS
- the FGF2 may be a functional equivalent of the FGF2.
- the functional equivalent is a substance capable of activating Ras-Raf via FGF receptors (FGFR1 or FGFR4) like FGF2.
- Examples of functional equivalents of FGF2 include FGF1 belonging to the FGF1 subfamily like FGF2.
- the KGF is a protein encoded by a polynucleotide registered with NCBI under accession number NM_002009.
- the KGF may be in an activated form after being cleaved by a protease.
- the KGF may be a functional equivalent of the KGF.
- the functional equivalent is a substance capable of activating Ras-Raf via FGF receptors (FGFR2b, FGFR1b, etc.) like KGF.
- Examples of functional equivalents of KGF include FGF3, FGF10, FGF22, etc., which belong to the FGF7 subfamily like KGF.
- the KGF may be in an activated form after being cleaved by a protease.
- the FGF10 is a protein encoded by a polynucleotide registered with NCBI under accession number NM_004465.
- the FGF10 may be in an activated form after being cleaved by a protease.
- the FGF10 may be a functional equivalent of the FGF10.
- the functional equivalent is a substance capable of activating Ras-Raf via FGF receptors (FGFR2b, FGFR1b) like FGF10.
- Examples of functional equivalents of FGF10 include KGF, FGF3, FGF22, etc., which belong to the FGF7 subfamily like FGF10.
- the FGF10 may be in an activated form after being cleaved by a protease.
- the concentration of the mesenchymal cell-inducing factor in the second induction step is not particularly limited, and may be an effective concentration at which each factor exhibits mesenchymal cell-inducing activity.
- the concentration of activin A in the medium is, for example, 0.01 to 1000 ng/ml, 0.1 to 100 ng/ml, or 0.2 ⁇ 10 ng/ml.
- FGF2 is used as the mesenchymal cell inducer
- the concentration of FGF2 in the medium is, for example, 0.1-1000 ng/ml, 1-100 ng/ml, or 2-50 ng/ml.
- BMP4 is used as the inducer of the mesenchymal cells
- the concentration of BMP4 in the medium is, for example, 0.1-1000 ng/ml, 1-100 ng/ml, or 2-50 ng/ml.
- the concentrations of the KGF and FGF10 in the second induction step are not particularly limited as long as each factor exhibits an effective concentration to induce pulmonary mesenchymal cells.
- the concentration of KGF in the medium is, for example, 0.1-1000 ng/ml, 1-100 ng/ml, or 2-50 ng/ml.
- the concentration of FGF10 in the medium is, for example, 0.1-1000 ng/ml, 1-100 ng/ml, or 2-50 ng/ml.
- the description of the medium in the first induction step can be used.
- the medium used in the second induction step may be the same as or different from the medium used in the first induction step.
- the culture period in the second induction step may be a period during which the pulmonary mesenchymal cells can be differentiated, for example, 1 to 9 days, 3 to 7 days, or 4 to 6 days.
- the description of the culture conditions in the first induction step can be used.
- the culture conditions in the second induction step may be the same as or different from the culture conditions in the first induction step.
- the differentiation of the pulmonary mesenchymal cells can be detected, for example, by loss of expression of the pulmonary mesenchymal cell marker and/or loss of expression of the mesoderm cell marker.
- the mesenchymal cell markers include, for example, PDGFR ⁇ , KDR, ISL1, NKX2-5, VIM, COL1A1, FOXF1, and/or TCF21, preferably FOXF1 and TCF21.
- mesodermal cell markers examples include TBXT (T-box transcription factor T).
- the content ratio (lower limit) of the lung mesenchymal cells in the total cells (cell population) after the induction is, for example, 5% or more, 10% or more, based on the number of cells. , 20% or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91 % or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, 94% or less, 93% or less, 92%, based on the number of cells % or less, 91% or less, 90% or less, 85% or less, 80% or less, 75% or less, 70% or less, 65% or less, 60% or less, 55% or less, or 50% or less.
- the numerical range of the content ratio can be, for example, any combination of the lower limit and the upper limit.
- the content ratio is, for example, 20 to 40% when cultured for 3 days.
- the content ratio is, for example, 60 to 90% when cultured for 7 days.
- the content ratio is lowered, for example, by shortening the number of culture days in the second induction step.
- the content ratio increases, for example, by lengthening the number of culture days in the first induction step.
- the method for producing pulmonary mesenchymal cells of the present disclosure may enrich the pulmonary mesenchymal cells after the second induction step.
- the method for producing pulmonary mesenchymal cells of the present disclosure for example, when alveolar organoids are formed using the obtained cell population containing pulmonary mesenchymal cells and pulmonary progenitor cells described later, II It can improve the induction efficiency of type alveolar epithelial cells.
- the method for producing pulmonary mesenchymal cells of the present disclosure includes, after the second induction step, enriching the pulmonary mesenchymal cells from the cell population derived from the mesoderm cells (enrichment step). including.
- the enrichment of the lung mesenchymal cells is, for example, in the cell population, a marker that is expressed in the lung mesenchymal cells and not expressed in other cells, or that is expressed in other cells at low levels (positive markers)
- a marker (negative marker) that is not expressed in the lung mesenchymal cells but is expressed in other cells or highly expressed in other cells (negative marker) can be used as an index.
- Said positive marker and said negative-marker are preferably markers expressed on the cell surface. Examples of the positive markers include PDGFR ⁇ , KDR, VIM, THY1, NCAM and the like. Examples of the negative marker include EpCAM, E-Cadherin and the like.
- Said enrichment may be performed using a combination of multiple markers. Said enrichment is performed, for example, with said negative marker in order to suppress the occurrence of signaling through said marker to said pulmonary mesenchymal cells.
- the enrichment is performed, for example, after collecting the cell population after the second induction step, using an antibody against the positive marker and/or an antibody against the negative marker using an automated magnetic cell separator (e.g., autoMACS) , magnetic cell sorter (eg MACS), closed magnetic cell sorter (eg Prodigy), cell sorter (eg FACS).
- an automated magnetic cell separator e.g., autoMACS
- MACS magnetic cell sorter
- closed magnetic cell sorter eg Prodigy
- FACS cell sorter
- the content ratio (lower limit) of positive marker-positive pulmonary mesenchymal cells in the cell population after the enrichment is, for example, 5% or more, 10% or more, 20% or more, based on the number of cells. % or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more , 92% or greater, 93% or greater, 94% or greater, 95% or greater, 96% or greater, 97% or greater, 98% or greater, or 99% or greater.
- the content ratio (upper limit) of the positive marker-positive pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, based on the number of cells, 94% or less, 93% or less, 92% or less, 91% or less, 90% or less, 85% or less, 80% or less, 75% or less, 70% or less, 65% or less, 60% or less, 55% or less, or 50 % or less.
- the numerical range of the content ratio of the positive marker-positive pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit.
- the content ratio (lower limit) of negative marker-negative pulmonary mesenchymal cells in the cell population after the enrichment is, for example, 5% or more, 10% or more based on the number of cells. , 20% or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91 % or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) of the negative marker-negative pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, based on the number of cells, 94% or less, 93% or less, 92% or less, 91% or less, 90% or less, 85% or less, 80% or less, 75% or less, 70% or less, 65% or less, 60% or less, 55% or less, or 50 % or less.
- the numerical range of the content ratio of negative marker-negative pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit.
- the content ratio (lower limit) of EpCAM-negative pulmonary mesenchymal cells in the cell population after the enrichment step is, for example, 5 based on the number of cells. % or more, 10% or more, 20% or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more , 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) of the EpCAM-negative pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, 94%, based on the number of cells. % or less, 93% or less, 92% or less, 91% or less, or 90% or less.
- the numerical range of the content of EpCAM-negative pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit.
- the EpCAM-negative pulmonary mesenchymal cells may be, for example, PDGFR ⁇ , KDR, VIM, and/or THY1-positive.
- the content ratio (lower limit) of the PDGFR ⁇ -positive and KDR-positive pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 5% or more, 10% or more, 20% or more, based on the number of cells, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) of the PDGFR ⁇ -positive and KDR-positive pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% based on the number of cells. 94% or less, 93% or less, 92% or less, 91% or less, or 90% or less.
- the numerical range of the content ratio of PDGFR ⁇ -positive and KDR-positive pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit.
- the content ratio (lower limit) of the VIM-positive and THY1-positive pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 5% or more, 10% or more, 20% or more, based on the number of cells, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) of lung mesenchymal cells in the VIM-positive and THY1-positive lung mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, based on the number of cells. % or less, 95% or less, 94% or less, 93% or less, 92% or less, 91% or less, or 90% or less.
- the numerical range of the content ratio of VIM-positive and THY1-positive pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit.
- the pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells of the present disclosure may be specified, for example, by the expression of various nucleic acids and proteins.
- the lung mesenchymal cells express, for example, RSPO2 (R-Spondin 2) and/or RSPO3 (R-Spondin 3). Also, the lung mesenchymal cells, for example, do not express WNT2. Said lung mesenchymal cells, for example, express RSPO2 and/or RSPO3 and do not express WNT2.
- the pulmonary mesenchymal cells for example, by expressing RSPO2 and / or RSPO3, when forming alveolar organoids using a cell population containing pulmonary mesenchymal cells obtained and pulmonary progenitor cells described later In addition, type II alveolar epithelial cells can be induced.
- the content ratio (lower limit) of RSPO2-positive pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 5% or more, 10% or more, 15% or more, 20% or more, based on the number of cells, 25% or more, or 30% or more.
- the content ratio (upper limit) of RSPO2-positive pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 50% or less, 45% or less, 40% or less, 35% or less, based on the number of cells, 30% or less, or 25% or less.
- the numerical range of the content ratio of RSPO2-positive pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit. As a specific example, when cultured for 7 days in the second culture step, the content ratio is, for example, 20 to 40%.
- the RSPO2 is particularly expressed, for example, in STC1 (Stanniocalcin-1)-positive pulmonary mesenchymal cells. Therefore, the RSPO2-positive cells can be enriched by using STC1, for example.
- the content ratio (lower limit) of RSPO2-positive pulmonary mesenchymal cells in the EpCAM-negative STC1-positive pulmonary mesenchymal cells is, for example, 50% or more, 55% or more, 60% or more, 65%, based on the number of cells.
- the content ratio (upper limit) of the RSPO2-positive pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, 94%, based on the number of cells. % or less, 93% or less, 92% or less, 91% or less, or 90% or less.
- the numerical range of the content ratio of RSPO2-positive pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit.
- the content ratio is, for example, 80% or more.
- the content ratio (lower limit) of RSPO3-positive pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 50% or more, 55% or more, 60% or more, 65% or more, based on the number of cells, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) of RSPO3-positive pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, based on the number of cells, 96% or less, 95% or less, 94% or less, 93% or less, 92% or less, 91% or less, or 90% or less.
- the numerical range of the content of RSPO3-positive pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit. As a specific example, when cultured for 7 days in the second culture step, the content ratio is, for example, 70 to 90%.
- the content ratio (lower limit) of Wnt2-negative pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 50% or more, 55% or more, 60% or more, 65% or more, based on the number of cells, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.
- the content ratio (upper limit) of Wnt2-negative pulmonary mesenchymal cells in the EpCAM-negative pulmonary mesenchymal cells is, for example, 100% or less, 99% or less, 98% or less, 97% or less, based on the number of cells, 96% or less, 95% or less, 94% or less, 93% or less, 92% or less, 91% or less, or 90% or less.
- the numerical range of the content of Wnt2-negative pulmonary mesenchymal cells can be, for example, any combination of the lower limit and the upper limit. As a specific example, when cultured for 7 days in the second culture step, the content ratio is, for example, 95% or more.
- the lung mesenchymal cells for example, as transcription factors, FOXF1 (Forkhead box protein F1), TCF21 (Transcription factor 21), TBX4 (T-Box Transcription Factor 4), and OSR1 (Odd-Skipped Related Transcription Factor) expressing a transcription factor selected from the group consisting of
- the pulmonary mesenchymal cells may, for example, express one or more transcription factors, or all transcription factors.
- the lung mesenchymal cells do not express TBXT, eg, as a transcription factor.
- the pulmonary mesenchymal cells express, for example, a transcription factor selected from the group consisting of FOXF1, TCF21, TBX4, and OSR1, and do not express TBXT.
- the pulmonary mesenchymal cells may, for example, further express fibroblast markers described below and/or be mesenchymal cell marker positive.
- the lung mesenchymal cells express, for example, fibroblast markers selected from the group consisting of NCAM, ADRP, COL1A1, and ACTA2. Said pulmonary mesenchymal cells are preferably NCAM, ADRP and/or COL1A1; cells expressing NCAM, ADRP and COL1A1.
- the lung mesenchymal cells may, for example, express one or more fibroblast markers, or all fibroblast markers.
- the lung mesenchymal cells are selected from the group consisting of, for example, VIM (Vimentin), THY1 (Thy-1 Cell Surface Antigen, CD90), PDGFR ⁇ (Platelet Derived Growth Factor Receptor ⁇ ), and KDR (Kinase Insert Domain Receptor) positive for mesenchymal cell markers.
- Said pulmonary mesenchymal cells are preferably cells expressing VIM, THY1 and/or COL1A1; or VIM, THY1 and COL1A1;
- the pulmonary mesenchymal cells may be, for example, positive for one or more types of mesenchymal cell markers, or may be positive for all types of mesenchymal cell markers.
- the pulmonary mesenchymal cells can induce, for example, epithelial cells that form alveoli from pulmonary progenitor cells described later.
- said pulmonary mesenchymal cells are capable of inducing type I and/or type II alveolar epithelial cells from said pulmonary progenitor cells, for example, in an alveolar organoid formation assay by co-culture with said progenitor cells.
- the alveolar organoid formation assay can be performed in the same manner as in Example 1(3) below.
- Examples of the alveolar epithelial cells include type I alveolar epithelial cells and type II alveolar epithelial cells.
- the pulmonary mesenchymal cells may, for example, be capable of inducing the type I alveolar epithelial cells or the type II alveolar epithelial cells from the pulmonary progenitor cells, or Epithelial cells may be inducible.
- the ratio (lower limit) of SFTPC-positive cells in the EpCAM-positive cell population from the pulmonary progenitor cells is 5% or more, 10% or more, 20% or more. , 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92 % or greater, 93% or greater, 94% or greater, 95% or greater, 96% or greater, 97% or greater, 98% or greater, or 99% or greater.
- the upper limit of the ratio is, for example, 100% or less, 99% or less, 98% or less, 97% or less, 96% or less, 95% or less, 94% or less, 93% or less, 92% or less, 91% or less, 90% 85% or less, 80% or less, 75% or less, 70% or less, 65% or less, 60% or less, or 55% or less.
- the numerical range of the ratio can be, for example, any combination of the lower limit and the upper limit. As a specific example, when the pulmonary mesenchymal cells and the pulmonary progenitor cells are cultured for 14 days, the ratio of the SFTPC-positive cells is 20-70%.
- alveolar epithelial cells can be induced when co-cultured with the pulmonary progenitor cells.
- the pulmonary mesenchymal cells are expected to be suitably used, for example, as cells for lung tissue regeneration.
- Cell population In another aspect, the present disclosure provides cell populations comprising pulmonary mesenchymal cells that can also be used to generate alveolar organoids.
- Cell populations comprising mesenchymal cells of the present disclosure include lung mesenchymal cells that express RSPO2 and/or RSPO3.
- the pulmonary mesenchymal cells of the present disclosure are, for example, pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells of the present disclosure, i.e., pulmonary mesenchymal cells after the second induction step or after the enrichment step. It may be identified by the expression of various nucleic acids, proteins in the cell description.
- the present disclosure provides a method for producing alveolar epithelial cells using the pulmonary mesenchymal cells.
- the method for producing alveolar epithelial cells of the present disclosure includes the step of culturing lung progenitor cells in the presence of pulmonary mesenchymal cells to induce differentiation into alveolar epithelial cells, wherein the pulmonary mesenchymal cells are It is a cell population containing lung mesenchymal cells obtained by the method for producing lung mesenchymal cells of the present disclosure and/or the mesenchymal cells of the present disclosure.
- the lung progenitor cells used for deriving the alveolar epithelial cells can be derived, for example, from progenitor cells of lung progenitor cells such as the pluripotent cells. Therefore, in the method for producing alveolar epithelial cells of the present disclosure, the lung progenitor cells may be induced from progenitor cells of lung progenitor cells prior to the induction of the alveolar epithelial cells.
- the method for producing alveolar epithelial cells of the present disclosure includes, for example, a step of culturing in the presence of an inducer of lung progenitor cells to induce differentiation into the lung progenitor cells (third induction step). .
- the progenitor cells of the lung progenitor cells are cultured in a medium containing the inducer of the lung progenitor cells to differentiate into lung progenitor cells that express the lung progenitor cell marker. That is, the progenitor cells of the pulmonary progenitor cells are brought into contact with the inducer of the pulmonary progenitor cells and cultured to differentiate the pulmonary progenitor cells.
- the induction of lung progenitor cells from progenitor cells of the lung progenitor cells is, for example, the method of inducing alveolar epithelial progenitor cells described in WO 2014/168264, the method described in WO 2019/217429.
- the progenitor cells of the pulmonary progenitor cells are, for example, ventral anterior foregut endoderm cells, anterior foregut endoderm cells, and/or the definitive endoderm lineage cells can give.
- Said pulmonary progenitor cells and progenitor cells of said pulmonary progenitor cells can be derived from said pluripotent cells or said pluripotent stem cells. Therefore, the lung progenitor cells and progenitor cells of the lung progenitor cells are preferably progenitor cells derived from the pluripotent cells or the pluripotent stem cells.
- the pluripotent stem cells include, for example, induced pluripotent stem cells (iPS cells), totipotent stem cells such as embryonic stem cells (ES cells); hematopoietic stem cells, neural stem cells, mesenchymal stem cells and the like pluripotent stem cells such as tissue stem cells or somatic stem cells;
- iPS cells induced pluripotent stem cells
- ES cells embryonic stem cells
- hematopoietic stem cells hematopoietic stem cells
- neural stem cells mesenchymal stem cells and the like pluripotent stem cells
- tissue stem cells or somatic stem cells pluripotent stem cells
- the cell population obtained in the third induction step is a cell population containing the lung progenitor cells and/or progenitor cells of the lung progenitor cells.
- the obtained cell population may be used as it is, or the lung progenitor cells and/or progenitor cells of the lung progenitor cells may be isolated from the obtained cell population and used.
- the pulmonary progenitor cells can be isolated, for example, based on expression of CPM, NKX2.1, SOX9, SOX2, and/or FOXA2.
- the lung progenitor cells are isolated as CPM-positive cells using the cell surface marker CPM.
- the lung progenitor cells are cultured in the presence of the lung mesenchymal cells to induce differentiation into alveolar epithelial cells (fourth induction step). .
- the lung progenitor cells are cultured in a medium containing the pulmonary mesenchymal cell inducer to differentiate into alveolar epithelial cells expressing the alveolar epithelial cell marker. That is, the lung progenitor cells are contacted with an inducer of the lung progenitor cells to differentiate the lung progenitor cells.
- the pulmonary progenitor cells may be cultured in the presence of the pulmonary mesenchymal cells and the alveolar epithelial cell inducer to induce differentiation into alveolar epithelial cells.
- the inducer of alveolar epithelial cells can be set according to the type of alveolar epithelial cells to be induced.
- the inducer of alveolar epithelial cells is an inducer of type I alveolar epithelial cells, and a specific example thereof is the Wnt inducer.
- the inducer may be of one type or of multiple types.
- the inducer is preferably of a plurality of types, more preferably of all types.
- the Wnt inducer is a substance that induces Wnt signals.
- the Wnt inducer is, for example, IWP2 (N-(6-Methyl-2-benzothiazolyl)-2-(3,4,6,7-tetrahydro-4-oxo-3-phenylthieno3,2-dpyrimidin-2-yl )thio), Dickkopf-related protein 1 (DKK1), XAV939 (3,5,7,8-Tetrahydro-2-[4-(trifluoromethyl)phenyl]-4H-thiopyrano[4,3-d]pyrimidin-4-one ); Wnt protein expression-inducing nucleic acid molecules (siRNA, shRNA, antisense, etc.), etc., preferably XAV939.
- IWP2 N-(6-Methyl-2-benzothiazolyl)-2-(3,4,6,7-tetrahydro-4-oxo-3-phenylthieno3,2-dpyr
- the concentration of the Wnt inducer in the medium is, for example, 1 nmol/l to 50 ⁇ mol/l, 10 nmol/l to 40 ⁇ mol/l, 50 nmol/l to 30 ⁇ mol/l, 100 nmol/l to 25 ⁇ mol/l, 500 nmol/l to 20 ⁇ mol/l. l.
- the explanation of the medium in the first induction step can be used.
- the number of days of culture in the step of inducing the type I alveolar epithelial cells can be set according to the period during which the type I alveolar epithelial cells are induced.
- the lower limit of the culture days is, for example, 4 days or more, 5 days or more, 6 days or more, 7 days or more, 8 days or more, 9 days or more, 10 days or more, 11 days or more, 12 days or more, or more days. is given.
- the upper limit of the culture days is, for example, 35 days or less, 30 days or less, 28 days or less, or 21 days or less.
- the description of the culture conditions in the first induction step can be used.
- the inducer of the alveolar epithelial cells is an inducer of type II alveolar epithelial cells.
- agents KGF, GSK3 ⁇ inhibitors, TGF ⁇ inhibitors, ROCK inhibitors and/or FGF10.
- the inducer may be of one type or of multiple types.
- the inducer is preferably of multiple types, more preferably a combination of the steroid agent, the cAMP derivative, the phosphodiesterase inhibitor, and the KGF.
- the KGF, GSK3 ⁇ inhibitor, and FGF10 can refer to the above description.
- the steroid drug is a steroidal anti-inflammatory drug.
- examples of the steroid drug include glucocorticoids and synthetic derivatives thereof, and specific examples include hydrocortisone, hydrocortisone succinate, prednisolone, methylprednisolone, methylprednisolone succinate, triamcinolone, triamcinolone acetonide, dexamethasone, betamethasone, and the like. , preferably dexamethasone or hydrocortisone.
- the concentration of the steroid agent in the medium is, for example, 1 nmol/l to 100 ⁇ mol/l, 1 nmol/l to 50 ⁇ mol/l, 10 nmol/l to 40 ⁇ mol/l, 10 nmol/l to 30 ⁇ mol/l, 10 nmol/l to 25 ⁇ mol/l. , from 10 nmol/l to 20 ⁇ mol/l.
- the cAMP derivative is a compound in which a substituent is modified (added) to cyclic AMP.
- the cAMP derivatives include, for example, cyclic adenosine monophosphate (cAMP), 8-bromo cyclic adenosine monophosphate (8-Br-cAMP), 8-chloro cyclic adenosine monophosphate (8-Cl-cAMP), 8-(4-Chlorophenylthio)cyclic adenosine monophosphate (8-CPT-cAMP), dibutyryl cyclic adenosine monophosphate (DB-cAMP) and the like, preferably 8-Br-cAMP.
- cAMP cyclic adenosine monophosphate
- 8-Br-cAMP 8-bromo cyclic adenosine monophosphate
- 8-Cl-cAMP 8-chloro cyclic adenosine monophosphate
- 8-CPT-cAMP
- the concentration of the cAMP derivative in the medium is, for example, 1 nmol/l to 100 ⁇ mol/l, 1 nmol/l to 50 ⁇ mol/l, 10 nmol/l to 40 ⁇ mol/l, 50 nmol/l to 30 ⁇ mol/l, 100 nmol/l to 25 ⁇ mol/l. , from 500 nmol/l to 20 ⁇ mol/l.
- the phosphodiesterase inhibitor is a compound that increases the intracellular concentration of cAMP or cGMP by inhibiting phosphodiesterase (PDE).
- PDE phosphodiesterase
- the phosphodiesterase inhibitors are, for example, 1,3-Dimethylxanthine, 6,7-Dimethoxy-1-(3,4-dimethoxybenzyl)isoquinoline, 4- ⁇ [3',4'-(Methylenedioxy)benzyl]amino ⁇ -6 -methoxyquinazoline, 8-Methoxymethyl-3-isobutyl-1-methylxanthine, 3-Isobutyl-1-methylxanthine (IBMX) and the like, preferably 1,3-dimethylxanthine.
- the concentration of the phosphodiesterase inhibitor in the medium is, for example, 1 nmol/l to 100 ⁇ mol/l, 1 nmol/l to 50 ⁇ mol/l, 10 nmol/l to 40 ⁇ mol/l, 50 nmol/l to 30 ⁇ mol/l, 50 nmol/l to 25 ⁇ mol/l. l, 50 nmol/l to 20 ⁇ mol/l.
- the TGF ⁇ inhibitor is a substance that inhibits signal transduction via SMAD caused by binding of TGF ⁇ to its receptor.
- examples of the TGF ⁇ inhibitor include substances that inhibit binding to the TGF ⁇ receptors of the ALK family, substances that inhibit phosphorylation of SMAD by the ALK family, and the like.
- TGF ⁇ inhibitor examples include Lefty-1 (NCBI Accession Number: NM_010094 (mouse), NM_020997 (human)), SB431542 (4-(4-(benzo[d][1,3]dioxol -5-yl)-5-(pyridine-2-yl)-1H-imidazol-2-yl)benzamide), SB202190 (4-(4-Fluorophenyl)-2-(4-hydroxyphenyl)-5-(4- pyridyl)-1H-imidazole), SB505124 (2-(5-Benzo1,3dioxol-5-yl-2-tert-butyl-3H-imidazol-4-yl)-6-methylpyridine), NPC30345, SD093, SD908, SD208 (Scios), LY2109761, LY364947, LY580276 (Lilly Research Laboratories), A-83-01 (WO2009/146408), etc., preferably SB43154
- the concentration of the TGF ⁇ inhibitor in the medium is, for example, 1 nmol/l to 50 ⁇ mol/l, 10 nmol/l to 40 ⁇ mol/l, 50 nmol/l to 30 ⁇ mol/l, 100 nmol/l to 25 ⁇ mol/l, 500 nmol/l to 20 ⁇ mol. /l. Preferably, it is between 1 nmol/l and 40 ⁇ mol/l.
- the ROCK inhibitor is a substance that can suppress the function of Rho kinase (ROCK).
- the ROCK inhibitors include, for example, Y-27632 ((+)-(R)-trans-4-(1-aminoethyl)-N-(4-pyridyl)cyclohexanecarboxamide dihydrochloride), Fasudil/HA1077 (5-(1, 4-Diazepane-1-sulfonyl)isoquinoline), H-1152 ((S)-(+)-2-Methyl-1-[(4-methyl-5-isoquinolinyl)sulfonyl]homopiperazine), Wf-536 ((+ )-(R)-4-(1-Aminoethyl)-N-(4-pyridyl) benzamide), ROCK protein expression-suppressing nucleic acid molecules (siRNA, shRNA, antisense, etc.), etc., preferably Y- 27632.
- the concentration of the ROCK inhibitor in the medium is, for example, 1 nmol/l to 50 ⁇ mol/l, 10 nmol/l to 40 ⁇ mol/l, 50 nmol/l to 30 ⁇ mol/l, 100 nmol/l to 25 ⁇ mol/l, 500 nmol/l to 20 ⁇ mol/l. l, 750 nmol/l to 15 ⁇ mol/l, preferably 1 nmol/l to 40 ⁇ mol/l.
- the description of the medium in the first induction step can be used.
- the number of days of culture in the step of inducing the type II alveolar epithelial cells can be set according to the period during which the type II alveolar epithelial cells are induced.
- the lower limit of the culture days is, for example, 2 days or more, 4 days or more, 5 days or more, 6 days or more, 7 days or more, 8 days or more, 9 days or more, 10 days or more, 11 days or more, 12 days or more, 13 days or more. days or more, 14 days or more, 15 days or more, or more.
- the upper limit of the culture days is, for example, 35 days or less, 30 days or less, 28 days or less, or 21 days or less.
- the description of the culture conditions in the first induction step can be used.
- differentiation of the alveolar epithelial cells can be detected, for example, by loss of expression of the alveolar epithelial cell marker and/or expression of the lung progenitor cell marker.
- the alveolar epithelial cells may be, for example, a cell population containing the type I alveolar epithelial cells or the type II alveolar epithelial cells, or cells containing the type I alveolar epithelial cells and the type II alveolar epithelial cells. It can be a group.
- markers for the alveolar epithelial cells include, for example, PDPN, AGER, CAV1, HOPX, and AQP5.
- markers for the alveolar epithelial cells include, for example, SFTPC, SFTPB, ABCA3, DCLAMP, and SLC34A2.
- the alveolar epithelial cells can be induced, for example, as organoids containing alveolar epithelial cells.
- the present disclosure provides methods capable of maintaining and/or expanding type II alveolar epithelial cells.
- the maintenance and/or expansion culture method for type II alveolar epithelial cells of the present disclosure includes a step of culturing type II alveolar epithelial cells in the presence of pulmonary mesenchymal cells to maintain or expand the culture (culturing step).
- the pulmonary mesenchymal cells are pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells of the present disclosure and/or a cell population containing the mesenchymal cells of the present disclosure.
- the type II alveolar epithelial cells are known to function as lung tissue stem cells. Therefore, in the culture step, for example, by inducing self-renewal (proliferation) of the type II alveolar epithelial cells, or self-renewal (proliferation) and differentiation of the type II alveolar epithelial cells, the type II alveolar Epithelial cells can be maintained and/or expanded.
- the pulmonary progenitor cells are cultured in a medium containing the pulmonary mesenchymal cells to maintain or proliferate the pulmonary progenitor cells expressing the pulmonary progenitor cell marker, or Lung progenitor cells expressing the marker are maintained or expanded and differentiated into alveolar epithelial cells expressing said alveolar epithelial cell marker.
- the pulmonary progenitor cells may be cultured in the presence of the pulmonary mesenchymal cells and the alveolar epithelial cell inducer to maintain or expand the pulmonary progenitor cells.
- the inducer of alveolar epithelial cells can be set according to the type of alveolar epithelial cells to be induced, and the description of the method for producing alveolar epithelial cells of the present disclosure can be used.
- compositions comprising pulmonary mesenchymal cells.
- a pharmaceutical composition of the present disclosure comprises the pulmonary mesenchymal cells of the present disclosure and a pharmaceutically acceptable carrier.
- a method of administration of the pharmaceutical composition of the present disclosure is, for example, intravenous administration.
- the dosage form of the pharmaceutical composition of the present disclosure is, for example, an injection.
- the number of pulmonary mesenchymal cells contained in the injection is, for example, 1 ⁇ 10 6 cells or more.
- the pharmaceutical composition may contain a pharmaceutically acceptable carrier. Examples of the carrier include physiological saline, phosphate buffered saline (PBS), cell preservation solution, cell culture solution, hydrogel, extracellular matrix, cryopreservation solution and the like.
- the pharmaceutical composition of the present disclosure can be suitably used, for example, for treating pulmonary diseases.
- the present disclosure provides media for use in deriving lung mesenchymal cells from mesodermal cells.
- the medium for use in deriving lung mesenchymal cells from mesoderm cells of the present disclosure comprises medium, an inducer of mesenchymal cells, and KGF and FGF10.
- the types, combinations, and concentrations of mesenchymal cell-inducing factors, KGF and FGF10 contained in the medium can refer to, for example, the description of the method for producing pulmonary mesenchymal cells of the present disclosure.
- kits for use in deriving lung mesenchymal cells from mesodermal cells includes an inducer of mesenchymal cells, and KGF and FGF10.
- KGF and FGF10 contained in the kit for example, the description of the method for producing pulmonary mesenchymal cells of the present disclosure can be used.
- the contents of the mesenchymal cell inducers, KGF and FGF10 in the kit for example, when added to a predetermined amount of medium, become the concentrations of each factor in the description of the method for producing pulmonary mesenchymal cells of the present disclosure. can be set as
- Example 1 It was confirmed that pulmonary mesenchymal cells can be induced by the production method of the present disclosure, and alveolar organoids can be formed by co-culturing the pulmonary mesenchymal cells and the pulmonary progenitor cells.
- Figure 1 shows an overview of the method for inducing pulmonary mesenchymal cells and pulmonary progenitor cells and forming alveolar organoids.
- iPSCs human-derived iPS cells
- D-PBS manufactured by Nacalai Tesque, Cat. No.: 14249-24
- protease manufactured by Innivative Cell Technologies, Cat.
- mTeSR Plus manufactured by STEMCELL technologies, Cat. No.: ST-05825 or ST-100-0276
- the iPSC-containing cell suspension was centrifuged to obtain the supernatant.
- Anti-EPCAM-FITC antibody manufactured by Miltenyi Biotec, Cat. No.: 130-080-301
- Anti-NCAM-Alexa Fluor 647 antibody BioLegend, Cat. No.: 362513
- Anti-T-Alexa Fluor 488 antibody RD systems, Cat. No.: IC2085G
- Anti-KDR-BV421 antibody BioLegend, Cat. No.: 393009
- Anti-THY1 (CD90)-BV421 antibody manufactured by BioLegend, Cat.
- Anti-Vimentin-Alexa Fluor 647 antibody manufactured by Novus Biologicals, Cat. No.: NBP1-97670AF647
- Anti -PDGFRA-Alexa Fluor 647 antibody manufactured by BD Biosciences, Cat. No.: 562798
- the cells were stained with propidium iodide (PI).
- PI propidium iodide
- the cell suspension is fixed with BD Cytofix/Cytoperm (manufactured by BD Biosciences, Cat. No.: 51-2090KZ) for 20 minutes, followed by BD Perm/Wash (BD Biosciences, Cat. No.: 51-2091KZ) was used to permeabilize the cell membrane for 20 minutes.
- the cells were washed twice with BD Perm/Wash and then stained with a primary antibody at 4°C for 15 minutes.
- the stained cell suspension was washed twice with BD Perm/Wash, and then stained with a secondary antibody at 4°C for 15 minutes.
- FIG. 2 is a photograph showing a phase-contrast image and an Oil Red O-stained image showing the differentiation state of cells after culture.
- (A) shows a phase-contrast image
- (B) shows an oil red O staining image.
- Each scale bar in FIG. 2 represents 100 ⁇ m.
- FIG. 2(A) each photograph is from the left on days 0, 1, 3, and 7 of culture.
- the cells had the shape of PSCs on the 0th day of culture, but on the 1st day of culture, the boundaries of the cell clusters became unclear, suggesting that differentiation had started. These are presumed to be TBXT-expressing cells in the EpCAM-positive cell population described below.
- FIG. 3 is a graph showing flow cytometry analysis.
- the upper graph shows, from the left, the results on days 0, 1, 3, and 7 of culture.
- the middle and lower graphs are, from the left, the EpCAM-negative cell population on day 0, day 1, and day 3 of culture, the EpCAM-negative cell population on day 7 of culture, and the EpCAM-positive cell population on day 7 of culture. cell population results.
- EpCAM-positive and TBXT-positive cells were observed, suggesting that they had differentiated into cells that are developmentally similar to the primitive streak.
- mesoderm cell markers NCAM, PDGFR ⁇ , and KDR was observed in the EpCAM-negative cell population, confirming differentiation into mesodermal cells. Furthermore, on day 7 of culture, it was confirmed that VIM, THY1 (CD90), PDGFR ⁇ , and KDR-positive mesenchymal cells, which are mesenchymal cell markers, were induced. These results confirmed that mesenchymal cells were induced even when KGF and FGF10 were added under the conditions for inducing mesenchymal cells.
- RNA extraction kit PureLink RNA mini kit, Thermo Fisher Scientific, Cat. No.: 12183020.
- cDNA was prepared from 80 ng of total RNA per sample using reverse transcriptase (SuperScript (registered trademark) III reverse transiptase, manufactured by Thermo Fisher Scientific).
- the resulting cDNA was amplified using an RT-PCR kit (Power SYBR Green PCR Master Mix, Applied Biosystems) and quantified using QuantStudio 3 (Applied Biosystems).
- the expression level of each gene was normalized (standardized) using the ⁇ -actin gene as an internal standard gene. Furthermore, it was quantified as a relative gene expression level with respect to the gene expression level in cells on day 0 of culture.
- the primer sets used for RT-qPCR are shown in Table 1 below. These results are shown in FIG.
- Fig. 4 is a graph showing gene expression in cells at each culture stage.
- the horizontal axis indicates the cell culture stage, and the vertical axis indicates the relative expression level.
- TBXT and EPCAM were found to be expressed in cells in the early stage of culture after the start of culture, but were not expressed in iMES.
- iMES the expression of fibroblast markers VIM and COL1A1 was induced.
- iMES showed expression of FOXF1 and TBX4, which are pulmonary mesenchymal cell markers.
- increased expression of NCAM, PDGFR ⁇ , KDR, ISL1, NKx2-5, OSR1, and ADRP was observed. From these results, it was found that the iMES induced by the method for producing pulmonary mesenchymal cells of the present disclosure are pulmonary mesenchymal cells. It was also found that the iMES can be distinguished from other cells using these markers.
- the primary antibodies are Anti-E-Cadherin antibody (manufactured by eBiosience, Cat No.: 14-3249), Anti-Vimentin antibody (manufactured by CST, Cat No.: 49636), and Anti-FOXF1 antibody (manufactured by RD systems manufactured by Cat No.: AF4798).
- the secondary antibody is Anti-rat IgG Alexa Fluor 488 (manufactured by Thermo Fisher Scientific, Cat No.: A-21208), Anti-mouse IgG Alexa Fluor 546 (manufactured by Thermo Fisher Scientific, Cat No.: A -10036), and Anti-goat IgG Alexa Fluor 647 (Thermo Fisher Scientific, Cat No.: A-21447).
- the stained sample was observed with a fluorescence microscope (BZ-X710, manufactured by Keyence Corporation).
- FIG. 5 is a photograph showing a fluorescent image of cells on day 7 of culture.
- the scale bar indicates 100 ⁇ m.
- E-cadherin positive cells were FOXF1 negative, while E-cadherin negative cells were VIM and FOXF1 positive.
- the definitive endoderm cells were cultured in anteriorization medium (Step 2), and on day 10 of culture, BMP4 (20 ng/ml) and ATRA (Sigma- Aldrich, Cat. No.: R2625) and CHIR99021, followed by culture (Step 3).
- BMP4 (20 ng/ml) and ATRA (Sigma- Aldrich, Cat. No.: R2625) and CHIR99021, followed by culture (Step 3).
- the optimal concentrations of ATRA and CHIR99021 were 0.05-0.5 ⁇ mol/l.
- the cells after posteriorization were cultured in CFKD preconditioning medium (Step 4).
- NKX2-1-positive lung progenitor cells were treated with mouse anti-human CPM (manufactured by Wako, Cat.
- lung progenitor cells are derived from SFTPC-GFP-expressing PSCs (B2-3 strain), and GFP expression is induced upon differentiation into alveolar epithelial cells.
- Alveolar Organoid Formation Assay Alveolar organoids were prepared according to Reference 13 above and Reference 14 below. 1.0 ⁇ 10 4 CPM-positive cells (derived from 201B7 strain PSC), 5.0 ⁇ 10 5 fetal fibroblasts (HFLF, DV Biologics, Cat No.: PP002-F-1349), human pediatric skin Derived fibroblasts (human pediatric dermal fibroblast: HDF, TIG120, available from the National Institute of Biomedical Innovation and Health and Nutrition), or iMES, Y-27632 (10 ⁇ mol / l) and 100 ⁇ l Matrigel (Corning No.: 354230) was mixed in 100 ⁇ l of the alveolization medium of Table 3 below.
- the resulting mixture was introduced onto 12-well cell culture inserts (Corning, Cat. No.: 3513). Then, it was cultured for 14 days. The medium in the lower chamber was changed every 2 days.
- the HFLF was cultured in 10% FBS-containing DMEM (manufactured by Nacalai Tesque, Cat. No.: 08459-64) and used at passage number 10.
- the TIG120 was cultured in a 10% FBS-containing MEM medium (manufactured by Nacalai Tesque, Cat. No.: 21442-25), and cells with a PDL of 30 or less were used.
- the obtained alveolar organoids were dissociated with 0.1% Tripsin-EDTA at 37°C for 15 minutes, and then washed twice with 1% BSA-containing PBS. After washing, immunostaining was performed with an anti-EpCAM-APC antibody (manufactured by Miltenyi Biotec, Cat. No.: 130-113-263). After the staining, SFTPC-GFP positive cells/EPCAM positive cells were analyzed using a flow cytometer (FACS). In addition, the alveolar organoids were observed using the fluorescence microscope. Furthermore, alveolar organoids were prepared in the same manner, except that the 604A1 cell line was used as the iPSC cell line. These results are shown in FIG.
- Fig. 6 is a graph showing the results of examination of alveolar organoids.
- (A) shows a fluorescence image of alveolar organoids
- (B) shows the analysis results of flow cytometry
- (C) shows SFTPC-GFP positive in EpCAM-positive cells in alveolar organoids. indicates the percentage of As shown in FIG. 6(A), when iMES and lung progenitor cells are co-cultured, spheroids containing SFTPC-GFP-positive cells are formed, and lung progenitor cells are differentiated into alveolar epithelial cells. It could be confirmed. Although not shown, spheroids containing SFTPC-GFP-positive cells were similarly formed when the 604A1 cell line was used.
- the constituent cells of the alveolar organoid were examined. Specifically, the alveolar organoids were fixed with PBS containing 4% paraformaldehyde for 20 minutes and then incubated overnight (about 8 hours) with PBS containing 30% sucrose. After the incubation, the alveolar organoids were embedded in OCT compound (Sakura Finetek, Cat. No.: 4583) and frozen using liquid nitrogen. Frozen alveolar organoids were sliced into 10 ⁇ m thick sections and mounted on slides. The sections obtained were permeabilized for 15 minutes with PBS containing 0.2% TritonTM X-100.
- alveolar organoids formed using the 201B7 cell line and 604A1 cell line were used, and the genes to be measured were SFTPB, SFTPC, SFTPD, SFTPA2, ABCA3, SLC34A2, HOPX, AGER, and AQP5.
- human fetal lung RNA (Agilent Technologies; #540177, lot 0006055802) at 17, 18, or 22 weeks of gestation was used, and the relative expression level was quantified. Otherwise, the expression of these genes in the alveolar organoids was examined in the same manner as in Example 1(1).
- FIG. 7 is photographs and graphs showing the expression of various cell markers in the alveolar organoids.
- (A) shows the fluorescence image of the alveolar organoid
- (B) shows the relative expression level of each gene.
- the horizontal axis indicates the iPSC strain
- the vertical axis indicates the relative expression level of each gene.
- VIM-positive iMES spread throughout the alveolar organoids.
- the type II alveolar epithelial cell markers Pro-SFTPC, ABCA3, SFTPC-GFP, and mature-SFTPC are cuboidal. detected in cells.
- each type I alveolar epithelial cell marker and type II alveolar epithelial cell marker were detected in alveolar organoids (iMES-AO) formed by co-culture with iMES. . From the above, it was found that alveolar organoids can be formed by three-dimensional co-culturing of iPSC-derived lung progenitor cells and iMES.
- the production method of the present disclosure can induce pulmonary mesenchymal cells, and that alveolar organoids can be formed by co-culturing the pulmonary mesenchymal cells and the pulmonary progenitor cells.
- pulmonary mesenchymal cells obtained by the production method of the present disclosure can be used to form alveolar organoids, it was found that the pulmonary mesenchymal cells (iMES) can be used as feeder cells instead of HFLF.
- iMES pulmonary mesenchymal cells
- Example 2 It was confirmed that alveolar organoids can be formed using iMES derived from iPSCs derived from other cells. In addition, the expression profile of iMES before and after culture was analyzed.
- iPSCs were induced from different cells, and it was confirmed whether alveolar organoids could be formed using the iMES induced from the different cells. That is, it was confirmed that the induced pulmonary mesenchymal cells can be used as feeder cells regardless of the origin of the pluripotent cells.
- iPSCs were induced from HFLF and HDF used in Example 1 above.
- HFA HFLF-iPSCs
- An episomal vector mix for producing human iPSCs containing cDNAs of OCT3/4, SOX2, KLF4, L-MYC, LIN28, mp53-DD, and EBNA1 was introduced by electroporation.
- HDF-iPSC (GC23) was prepared using the episomal vector for human iPSC production (OCT3/4, SOX2, KLF4, L-MYC, LIN28, short hairpin RNA for p53 (mp53-DD)), It was established from HDF (TIG120) in a feeder cell-dependent manner. The resulting HDF-iPSCs were then expanded and frozen. The HDF-iPSCs were also maintained and passaged feeder cell-free using mTeSR Plus medium after thawing of frozen cells and prior to induction into iMES.
- HFLF HFLF-iPSCs
- HDF HDF
- GC23 HDF-iPSCs
- PowerPlex registered trademark
- 16 HS System manufactured by Promega was used to examine 16 short tandem repeat loci (Table 4 below) of HFLF, HFLF-iPSCs (HFA), HDF, and HDF-iPSCs (GC23). rice field.
- the tandem repeats at each locus were perfectly matched between iPSCs and the corresponding parental fibroblasts.
- HFLF-iPSCs and HDF-iPSCs expressed undifferentiated markers (Nanog, OCT3/4), did not exhibit abnormal karyotypes, and had trigerm layers (ectoderm, mesoderm, and endoderm) was also confirmed. Therefore, iMES were prepared using HFLF-iPSCs (HFA) and HDF-iPSCs (GC23).
- iMES pulmonary mesenchymal cells
- the mRNAs of PFGFRA, VIM, COL1A1, FOXF1, and TBX4 were prepared in the same manner as in Example 1 (1) except that the obtained iMES and HDF were used, and the relative expression of HFLF as an exogenous control. Amount was quantified.
- the obtained iMES was examined for expression of VIM, THY1, PDGFRA, and KDR by flow cytometry in the same manner as in Example 1(1).
- FIG. 9 is a diagram related to iMES marker expression.
- (A) is a photograph showing a fluorescent image of each cell
- (B) shows gene expression in each cell
- (C) shows the results of flow cytometry analysis.
- FIG. 9(A) it was found that iMES induced from HFLF-iPSCs (HFA) and HDF-iPSCs (GC23) also expressed VIM and FOXF1 at the protein level.
- VIM, THY1, and PDGFRA were found in both iMES derived from HFLF-iPSCs (HFA) and HDF-iPSCs (GC23).
- KDR-expressing iMES was highly expressed in HFLF and iMES, but hardly expressed in HDF.
- alveolar organoid was formed in the same manner as in Example 1(3).
- the alveolar organoids were observed using the fluorescence microscope.
- the cells composing the alveolar organoids were dissociated, and the obtained cells were analyzed for SFTPC-GFP-positive cells/EPCAM-positive cells.
- FIG. 10 is a diagram relating to the ability to form organoids.
- (A) shows the results of flow cytometry analysis
- (B) shows the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells in alveolar organoids.
- SFTPC-GFP-positive cells were induced in both iMES induced from HFLF-iPSCs (HFA) and HDF-iPSCs (GC23). was found to induce alveolar epithelial cells.
- RNA-Seq analysis was performed on HDFs. Specifically, total RNA was extracted using an RNA extraction kit (RNeasy micro kit, manufactured by Qiagen) according to the attached protocol. A library of each sample was prepared from the obtained RNA using TruSeq Stranded mRNA Library Prep Kit (manufactured by Illumina).
- the resulting library was sequenced with 100 bp paired-end reads using NovaSeq 6000 (manufactured by Illumina).
- Raw FASTQ data were trimmed using software (fastp 0.20.1, https://github.com/OpenGene/fastp#install-with-bioconda, Reference 15), and then processed using software (SortMeRna 2.1b, https:/ /github.com/biocore/sortmerna, ref. 16) was used to exclude rRNA, tRNA, snRNA, snoRNA, Mt_rRNA, and Mt_tRNA.
- the preprocessed data were aligned to GRCh38 using software (STAR 2.7.6a, https://github.com/alexdobin/STAR, reference 17).
- RSEM 1.3.3 https://github.com/deweylab/RSEM, reference 18
- TPM transcripts per million
- R 4.1.1 http://www.R-project.org
- tximport 1.20.0 https://github.com/mikelove/tximport, reference 19
- Reference 18 Li, B., and Dewey, CN (2011).
- RSEM accurate transcript quantification from RNA-Seq data with or without a reference genome.
- Reference 19 Soneson, C., Love, MI, and Robinson, MD (2015). Differential analyzes for RNA-seq: transcript-level estimates improve gene-level inferences. F1000Res 4, 1521.
- Reference 20 Subramanian, A., Tamayo, P., Mootha, VK, Mukherjee, S., Ebert, BL, Gillette, MA, Paulovich, A., Pomeroy, SL, Golub, TR, Lander, ES, et al. (2005).
- FIG. 11 is a diagram showing the results of RNA-Seq analysis.
- principal component analysis (PCA) of the RNA-seq transcriptome showed that the clusters under each condition were well separated, indicating alveolar organoid formation (hereinafter referred to as “3D culture”).
- the transcriptomes of HFLF after iMES and 3D culture are plotted nearby.
- the HDF after 3D culture existed separately from the iMES and HFLF after 3D culture.
- Gene expression is often dependent on medium composition, culture conditions (eg, 2D or 3D).
- WNT5A, FGF7, and PDGFRA are known to be important factors in type II alveolar epithelial cells, but unexpectedly, WNT5A, FGF7, and PDGFRA are elevated in HDF, as shown in FIG. Was.
- iMES the expression levels of secretory proteins such as RSPO2, WNT11, CCN2, SPARC, BMP4, HHIP, LAMA5 and LOX were increased.
- Expression levels of transcription factors (TFs) such as FOXF1 and TCF21 were higher in HFLF-iMES, HDF-iMES and HFLF compared to HDF. Therefore, it was suggested that iMES has characteristics of lung fibroblasts.
- EPAS1 was a common gene in HFLF-iMES and HFLF, but in HDF, the expression level of EPAS1 was higher than in HFLF, suggesting that it is not a specific marker for pulmonary mesenchyme.
- the top 5000 genes of HFLF-iMES and HFLF after 3D culture were picked up and a Venn diagram was drawn.
- Genes annotated in “Lung development” again included HHIP, CCN2, SPARC, BMP4, LAMA5, and LOX, indicating that these genes are important factors in alveolar organoid formation. It was suggested.
- transcription factors FOXF1, TCF21, and EPAS1 annotated in "Lung development” were also included, suggesting the possibility that these may serve as markers for lung fibroblasts.
- FIG. 12 and Table 5 above show the expression levels (TPM) of Wnt ligands and TGF ⁇ antagonists.
- TPM TGF ⁇ antagonists
- the cells were dissociated with 0.1% Tripsin-EDTA at 37°C for 15 minutes, and then washed twice with 1% BSA-containing PBS. The washed cells were immunostained with an anti-EPCAM-APC antibody. Thereafter, the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells under each condition was evaluated by flow cytometry.
- FIG. 13 is a diagram showing the culture method and analysis results of SFTPC-GFP-positive cells.
- A shows the culture method
- B shows the analysis results of flow cytometry
- C shows the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells
- D indicates GFP-positive cells in each well
- E indicates the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells.
- GFP-positive cells were confirmed under any condition by culturing for 4 days.
- FIGS. 13(B), (C), and (D) GFP-positive cells were confirmed under any condition by culturing for 4 days.
- the RSPO2/SB431542 addition group, the RSPO3/SB431542 addition group, and the RSPO2/RSPO3/SB431542 addition group showed a ratio of SFTPC-GFP-positive cells to EpCAM-positive cells.
- the RSPO2/RSPO3/SB431542 addition group increased the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells to the same extent as 2i (CHIR99021/SB431542).
- none of the TGF ⁇ family ligand antagonists increased the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells.
- SB431542 contributes to alveolar organoid formation through another endogenous mechanism that replaces its role in inhibiting the TGF ⁇ pathway. It was suggested that In addition, the following is presumed as another endogenous mechanism. Since SB431542 is an artificial low-molecular-weight compound, it induces type II alveolar epithelial cells in a living environment by a mechanism other than TGF ⁇ pathway inhibition, and iMES also induces type II by a mechanism other than TGF ⁇ pathway inhibition. Presumed to induce alveolar epithelial cells. In addition, it is presumed that iMES secretes substances other than FST that more potently inhibit the TGF ⁇ pathway. In addition, the present invention is not limited to the above estimation.
- mice myofibrous cells, mesenchymal alveolar niche cells, references 23-24. Therefore, we analyzed the published data of scRNA-seq published in References 23 and 24 above, and examined which type of mesenchymal cells iMES resembled. Specifically, we re-clustered three types of mesenchymal cells, secondary crest myofibroblast (SCMF), Wnt2-P ⁇ cells, and mesenchymal alveolar niche cells (MANC), and identified genes that were significantly elevated in cell clusters of each lineage. picked up. Next, we constructed a gene set representing the characteristics of each mesenchymal cell cluster.
- SCMF secondary crest myofibroblast
- Wnt2-P ⁇ cells Wnt2-P ⁇ cells
- MANC mesenchymal alveolar niche cells
- mice were converted to corresponding human genes, followed by scRNA-seq analysis of iMES, HFLF and HDF.
- GSEA was performed using the data of Specifically, scRNA-seq data was downloaded from GSE149563.
- Gene expression data normalization, dimensionality reduction, and data visualization were performed using Seurat 4.0.5 and Plotly 4.9.4.1.
- the overexpressed genes in each cluster were picked up by Seurat's function FindAllMarkers using Wilcoxon's rank sum test with a cutoff value of P ⁇ 0.05, and genes expressed in 25% or more cells were extracted.
- FIG. 14 is a diagram showing the results of cluster analysis of each mesenchymal cell.
- each mesenchymal cell-specific marker was consistent with references 23 and 24 above.
- Wnt2 in Wnt2-P ⁇ , Stc1 in SCMF, and Mfap5 in the MANC cluster each showed high expression levels.
- the SCMF gene set was enriched with iMES compared to HFLF and HDF after 3D culture.
- the MANC gene set was enriched in HDF
- the Wnt2-P ⁇ gene set was enriched in HFLF.
- iMES can be used to form alveolar organoids
- iMES contributes to the differentiation of alveolar epithelial cells by at least one of RSPO2 and RSPO3
- the gene expression profile of iMES is SCMF was found to be similar to
- Alveolar organoids were formed in the same manner as in Example 1(3). SFTPC-GFP-positive type II alveolar epithelial cells were separated from the obtained alveolar organoids, and whether they could be maintained and cultured in iMES was investigated. Specifically, it was carried out as shown in FIG. first. Alveolar organoids obtained in the same manner as in Example 1(3) were converted to single cells using PBS containing 0.1% Trypsin-EDTA. Immunostaining was performed using an anti-EPCAM-APC antibody (manufactured by Miltenyi Biotec, Cat No.: 130-113-263), and SFTPC-GFP+/EPCAM+ cells were collected using FACS.
- SFTPC-GFP-positive type II alveolar epithelial cells were separated from the obtained alveolar organoids, and whether they could be maintained and cultured in iMES was investigated. Specifically, it was carried out as shown in FIG. first. Alveolar organoids obtained in the same manner as in Example 1(3) were converted to single cells using PBS
- Example 1(3) Cells from P0 to P3 were analyzed for SFTPC-GFP-positive cells/EPCAM-positive cells using a flow cytometer (FACS) in the same manner as in Example 1(3).
- FACS flow cytometer
- the expression of SFTPB, SFTPC, SFTPD, ABCA3, SFTPA2, SLC34A2, HOPX, AGER, and AQP5 was quantified in the cells from P0 to P3 in the same manner as in Example 1(1).
- alveolar organoids were stained using primary and secondary antibodies against Mature-GFP, PDPN, and HT1-56.
- Fig. 15 shows the results of passage of type II alveolar epithelial cells.
- EpCAM-positive cells increased linearly from P0 to P3.
- SFTPC-GFP-positive cells increased in the first passage, increased significantly from P0 to P2, and reached a plateau.
- ABCA3, SLC34A2 type II alveolar epithelial cell marker
- HOPX type II alveolar epithelial cell marker
- Example 4 The ligand-target and ligand-receptor interactions between iMES and alveolar epithelial cells were analyzed.
- scRNA-seq analysis was performed on iMES after culture of P2.
- a single cell RNA library was prepared from iMES, HFLF and HDF using the 10x genomics Chromium device according to the attached protocol (Single Cell 3' Reagent Kits v3.1).
- the obtained library was sequenced using NovaSeq 6000 (manufactured by Illumina).
- the obtained readings were then mapped to GRCh38 and a count matrix was generated using Cell Ranger.
- a software (Seurat 4.0.4, ref. 26) was used to process the single-cell data obtained.
- Dead or poor quality cells were excluded in the treatments by deleting data from cells expressing >20% and ⁇ 1.5% of the mitochondrial gene.
- Cells with a UMI greater than or equal to 140,000 or less than 5,000 and expressed genes less than 2,000 were also removed to exclude cell doublets and cells of low quality.
- the UMI numbers were normalized by SCTransform.
- the obtained data were then subjected to principal component (PC) analysis using the Seurat function RunPCA and embedded in UMAP with 17 PCs and a resolution of 1 using the Seurat function RunUMAP.
- the UMAP plot was visualized with Plotly 4.9.4.1, and the violin plot was drawn with Seurat.
- Fig. 16 shows the results of cluster analysis of scRNA-seq analysis.
- alveolar epithelial cells and iMES were segregated by high expression of NKX2-1 and COL1A1, respectively.
- FIG. 16(B) as a result of the cluster analysis, the P2 cultured alveolar organoids were annotated into 15 clusters.
- Each cluster was determined to be a cluster of the following cells based on genes with high expression in the cluster.
- cluster 12 was considered to be type I alveolar epithelial cells because of the high expression of AGER and CAV1.
- Clusters 1, 8, and 14 were considered to be type II alveolar epithelial cells due to the high expression level of SFTPC.
- Clusters of other epithelial cell lines are: cluster 5, ASCL1-positive cells; clusters 2 and 7, SOX9-positive cells; cluster 6, SOX2-positive cells; cluster 0, MKI67. were considered to be the cells of Cluster 13 had high expression levels of FOXJ1, SNTN, and SFTPC, indicating that SFTPC-positive distal tip cells differentiated into ciliated cells.
- iMES was divided into five clusters, as shown in FIG. 16(D). Specifically, as shown in FIG.
- cluster 9 is STC1-positive iMES
- cluster 4 is FSTL1-positive iMES
- cluster 10 is THY1-positive iMES
- cluster 3 is WT1-positive iMES
- cluster 11 is , considered iMES during cell division.
- FOXF1, RSPO2, and RSPO3 were examined among the genes listed in the iMES transcriptome after 3D culture.
- FOXF1-positive, RSPO3-positive iMES were widely distributed in mesenchymal clusters.
- FIG. 16(E) RSPO2 was specifically expressed in STC1-positive iMES.
- NicheNet was also used to infer ligand-receptor interactions considering only those ligand-receptor interactions described in the literature and public databases.
- Reference 29 Du, Y., Ouyang, W., Kitzmiller, JA, Guo, M., Zhao, S., Whitsett, JA, and Xu, Y. (2021).
- Lung Gene Expression Analysis Web Portal Version 3 Lung-at-a-Glance. Am J Respir Cell Mol Biol 64, 146-149.
- FIG. 17 shows results showing ligand-receptor interactions.
- NAMPT and TGFB1 interacted with INSR and TGFBR1/2/3, respectively.
- TGFB2, HAS2, and CTF1 interacted with TGFBR1/2/3, CD44, and IL6ST/LIFR, respectively.
- type I alveolar epithelial cells, type II alveolar epithelial cells, ASCL1-positive cells, and ciliated epithelial cells type I alveolar epithelial cells, ASCL1 Positive cells and ciliated epithelial cells are branching around clusters of type II alveolar epithelial cells and differentiated from type II alveolar epithelial cells, i.e. cells derived from type II alveolar epithelial cells. cells.
- Example 5 It was confirmed that pulmonary mesenchymal cells can be efficiently induced from mesodermal cells by combining a mesenchymal cell inducer with KGF and FGF10.
- Example 3 Formation assay of alveolar organoids in the same manner as in Example 1 (3) except that the pulmonary mesenchymal cells of Example 5 (1) and the pulmonary progenitor cells of Example 5 (2) were used , formed alveolar organoids. Then, the cells composing the obtained alveolar organoids were isolated, and SFTPC-GFP-positive cells/EPCAM-positive cells were analyzed in the same manner as in Example 1(3). The results are shown in FIG.
- FIG. 18 is a graph showing the results of SFTPC-GFP positive cells/EPCAM positive cells.
- FIG. 18(A) shows the results of flow cytometry analysis, and (B) shows the ratio of SFTPC-GFP-positive cells to EpCAM-positive cells in alveolar organoids.
- the horizontal axis indicates the added factor (AKB210) or the removed factor (-X), and the vertical axis indicates the ratio of SFTPC-GFP-positive cells/EPCAM-positive cells.
- AKB210 indicates the case where activin A, KGF, BMP4, FGF2, and FGF10 were all added. As shown in FIGS.
- Appendix> Some or all of the above-described embodiments and examples can be described as in the following appendices, but are not limited to the following.
- ⁇ Method for producing pulmonary mesenchymal cells> (Appendix 1) A method for producing pulmonary mesenchymal cells, comprising the step of culturing mesoderm cells in the presence of a mesenchymal cell inducer and KGF and FGF10 to induce differentiation into pulmonary mesenchymal cells. (Appendix 2) 2. The method for producing pulmonary mesenchymal cells according to Appendix 1, comprising enriching EpCAM- and/or E-cadherin-negative pulmonary mesenchymal cells from the cell population derived from the mesoderm cells.
- Appendix 3 The method for producing pulmonary mesenchymal cells according to appendix 2, wherein the enrichment is enrichment to a cell population containing 50% or more of EpCAM and/or E-cadherin negative pulmonary mesenchymal cells.
- Appendix 4 4. The method for producing lung mesenchymal cells according to any one of Appendices 1 to 3, wherein the lung mesenchymal cells express RSPO2 (R-Spondin 2) and/or RSPO3 (R-Spondin 3).
- the lung mesenchymal cells are selected from the group consisting of FOXF1 (Forkhead box protein F1), TCF21 (Transcription factor 21), TBX4 (T-Box Transcription Factor 4), and OSR1 (Odd-Skipped Related Transcription Factor) 5.
- the method for producing lung mesenchymal cells according to any one of Appendices 1 to 4, which expresses a transcription factor.
- the lung mesenchymal cells are RSPO2 (R-Spondin 2), RSPO3 (R-Spondin 3), FOXF1 (Forkhead box protein F1), TCF21 (Transcription factor 21), TBX4 (T-Box Transcription Factor 4), and 4.
- Appendix 7 The method for producing lung mesenchymal cells according to any one of Appendices 1 to 6, wherein the lung mesenchymal cells do not express WNT2.
- Appendix 8) 8. The method for producing lung mesenchymal cells according to any one of Appendices 1 to 7, wherein the lung mesenchymal cells do not express TBXT (T-box transcription factor T).
- the lung mesenchymal cells are NCAM (neural cell adhesion molecule), ADRP (Adipose differentiation-related protein), COL1A1 (Collagen, type I, alpha 1), and ACTA2 (actin alpha 2) fibers selected from the group 9.
- the method for producing lung mesenchymal cells according to any one of Appendices 1 to 8, which expresses a blast cell marker. (Appendix 10) while said pulmonary mesenchymal cells are selected from the group consisting of VIM (Vimentin), THY1 (Thy-1 Cell Surface Antigen, CD90), PDGFR ⁇ (Platelet Derived Growth Factor Receptor ⁇ ), and KDR (Kinase Insert Domain Receptor) 10.
- Appendix 11 11.
- the pulmonary mesenchymal cells are capable of inducing type I alveolar epithelial cells and/or type II alveolar epithelial cells from the pulmonary progenitor cells in an alveolar organoid formation assay by co-culture with pulmonary progenitor cells. 12.
- the method for producing pulmonary mesenchymal cells according to any one of 1 to 11. (Appendix 13) 13. The method according to any one of Appendices 1 to 12, comprising culturing the pluripotent cells in the presence of a mesoderm inducer to induce differentiation into the mesoderm cells prior to the induction of the pulmonary mesenchymal cells. of the mesenchymal cells. (Appendix 14) 14. The method for producing mesenchymal cells according to Appendix 13, wherein the mesoderm-inducing factor comprises a factor selected from the group consisting of a GSK3 ⁇ inhibitor, activin A, and BMP4. (Appendix 15) 15.
- ⁇ Lung mesenchymal cells> A cell population comprising mesenchymal cells, including pulmonary mesenchymal cells expressing RSPO2 (R-Spondin 2) and/or RSPO3 (R-Spondin 3).
- the lung mesenchymal cells are selected from the group consisting of FOXF1 (Forkhead box protein F1), TCF21 (Transcription factor 21), TBX4 (T-Box Transcription Factor 4), and OSR1 (Odd-Skipped Related Transcription Factor) 17.
- FOXF1 Formhead box protein F1
- TCF21 Transcription factor 21
- TBX4 T-Box Transcription Factor 4
- OSR1 Odd-Skipped Related Transcription Factor
- (Appendix 18) 18. The cell population of paragraph 16 or 17, wherein said pulmonary mesenchymal cells express RSPO2 and RSPO3.
- Appendix 22 22.
- Appendix 23 23.
- the lung mesenchymal cells are at least selected from the group consisting of NCAM (neural cell adhesion molecule), ADRP (Adipose differentiation-related protein), COL1A1 (Collagen, type I, alpha 1), and ACTA2 (actin alpha 2) 24. A cell population according to any of paragraphs 16 to 23, which expresses one fibroblast marker.
- the lung mesenchymal cells are at least selected from the group consisting of VIM (Vimentin), THY1 (Thy-1 Cell Surface Antigen, CD90), PDGFR ⁇ (Platelet Derived Growth Factor Receptor ⁇ ), and KDR (Kinase Insert Domain Receptor) 25.
- Appendix 26 Said pulmonary mesenchymal cells are capable of inducing type I alveolar epithelial cells and/or type II alveolar epithelial cells from said pulmonary progenitor cells in an alveolar organoid formation assay by co-culture with pulmonary progenitor cells. 25. The cell population according to any one of 25.
- ⁇ Method for producing alveolar epithelial cells> (Appendix 27) culturing lung progenitor cells in the presence of pulmonary mesenchymal cells to induce differentiation into alveolar epithelial cells;
- the pulmonary mesenchymal cells are pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells according to any one of Appendices 1 to 15, and/or the mesenchymal cells according to any one of Appendices 16 to 26.
- Appendix 29 29.
- Appendix 30 30.
- Appendix 32 The manufacture according to any one of Appendices 27 to 30, wherein the pulmonary progenitor cells are cultured in the presence of the inducer of the pulmonary mesenchymal cells and alveolar epithelial cells to induce differentiation into the alveolar epithelial cells.
- ⁇ Pharmaceutical composition> (Appendix 33) A cell population comprising pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells according to any one of Appendices 1 to 15 and/or the mesenchymal cells according to any one of Appendices 16 to 26; A pharmaceutical composition comprising a legally acceptable carrier.
- a step of culturing type II alveolar epithelial cells in the presence of pulmonary mesenchymal cells for maintenance The pulmonary mesenchymal cells are pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells according to any one of Appendices 1 to 15, and/or the mesenchymal cells according to any one of Appendices 16 to 26.
- a method for maintaining and culturing type II alveolar epithelial cells which is a cell population containing (Appendix 35) 35.
- the maintenance culture method according to Appendix 34 wherein the type II alveolar epithelial cells are SFTPC-positive cells.
- Appendix 36 36.
- the inducer of alveolar epithelial cells is Wnt promoter, steroid, cAMP derivative, phosphodiesterase inhibitor, KGF, GSK3 ⁇ inhibitor, TGF ⁇ inhibitor, ROCK inhibitor, FGF10, and/or EGF, according to Appendix 36
- ⁇ Expansion culture method for type II alveolar epithelial cells> (Appendix 38) Culturing and expanding type II alveolar epithelial cells in the presence of pulmonary mesenchymal cells;
- the pulmonary mesenchymal cells are pulmonary mesenchymal cells obtained by the method for producing pulmonary mesenchymal cells according to any one of Appendices 1 to 15, and/or the mesenchymal cells according to any one of Appendices 16 to 26.
- the expansion culture method according to Appendix 38, wherein the type II alveolar epithelial cells are SFTPC-positive cells. (Appendix 40) 40.
- the inducer of alveolar epithelial cells is Wnt promoter, steroid, cAMP derivative, phosphodiesterase inhibitor, KGF, GSK3 ⁇ inhibitor, TGF ⁇ inhibitor, ROCK inhibitor, FGF10, and/or EGF, according to Appendix 40 The expansion culture method described.
- ⁇ Culture medium> A medium for deriving lung mesenchymal cells from mesoderm cells, comprising: A medium comprising a medium (basal medium), an inducer for mesenchymal cells, and KGF and FGF10. (Appendix 43) 43.
- the medium of paragraph 42, wherein the inducer of mesenchymal cells comprises a factor selected from the group consisting of activin A, FGF2, and BMP4.
- ⁇ Kit> A kit for deriving lung mesenchymal cells from mesodermal cells, comprising: A kit comprising an inducer of mesenchymal cells and KGF and FGF10. (Appendix 45) 45.
- the kit of paragraph 44, wherein the inducer of mesenchymal cells comprises an agent selected from the group consisting of activin A, FGF2, and BMP4.
- pulmonary mesenchymal cells that can also be used to create alveolar organoids can be produced. Therefore, the present disclosure is extremely useful in, for example, the fields of regenerative medicine, cell medicine, and the like.
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Abstract
Description
前記肺間葉細胞は、本開示の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、本開示の間葉細胞を含む細胞集団である。
本明細書において、「マーカー」は、対象とする細胞で異なる程度で発現されている核酸、遺伝子、ポリペプチド、またはタンパク質を意味する。前記マーカーが陽性マーカーの場合、前記異なる程度は、未分化細胞と比較して、発現が増加していることを意味する。前記マーカーが陰性マーカーの場合、前記異なる程度は、未分化細胞と比較して、発現が低下していることを意味する。
ある態様において、本開示は、肺間葉細胞の製造方法または肺胞オルガノイドの形成に使用可能な肺間葉細胞の製造方法を提供する。本開示の肺間葉細胞の製造方法は、中胚葉細胞を、間葉細胞の誘導因子とKGFおよび/またはFGF10との存在下で培養し、肺間葉細胞への分化を誘導する工程を含む。本開示の肺間葉細胞の製造方法によれば、肺胞オルガノイドの形成に使用可能な肺間葉細胞を提供できる。また、本開示の肺間葉細胞の製造方法により得られた肺間葉細胞を用いて肺胞オルガノイドを形成した場合、前記肺胞オルガノイドでは、例えば、I型肺胞上皮細胞、II型肺胞上皮細胞、気道繊毛上皮細胞等の気道上皮細胞を含む。このため、本開示の肺間葉細胞の製造方法によれば、例えば、前記HFLFを代替可能な支持細胞としての肺間葉細胞を提供できる。
参考文献1:Han, L., Chaturvedi et al. “Single cell transcriptomics identifies a signaling network coordinating endoderm and mesoderm diversification during foregut organogenesis.” Nat Commun, 2020, 11, 4158.
参考文献2:Kishimoto, K. et al, “Bidirectional Wnt signaling between endoderm and mesoderm confers tracheal identity in mouse and human cells.” Nat Commun, 2020, 11, 4159.
参考文献3:Loh, K.M. et al., “Mapping the Pairwise Choices Leading from Pluripotency to Human Bone, Heart, and Other Mesoderm Cell Types.” Cell, 2016, 166, 451-467.
参考文献4:Xi, H. et al. “In Vivo Human Somitogenesis Guides Somite Development from hPSCs.” Cell Rep, 2017, 18, 1573-1585.
参考文献5:Thomson JA et al., “Embryonic stem cell lines derived from human blastocysts.”, Science, 1998, vol. 282, pages 1145-1147
MPLLWLRGFLLASCWIIVRSSPTPGSEGHSAAPDCPSCALAALPKDVPNSQPEMVEAVKKHILNMLHLKKRPDVTQPVPKAALLNAIRKLHVGKVGENGYVEIEDDIGRRAEMNELMEQTSEIITFAESGTARKTLHFEISKEGSDLSVVERAEVWLFLKVPKANRTRTKVTIRLFQQQKHPQGSLDTGEEAEEVGLKGERSELLLSEKVVDARKSTWHVFPVSSSIQRLLDQGKSSLDVRIACEQCQESGASLVLLGKKKKKEEEGEGKKKGGGEGGAGADEEKEQSHRPFLMLQARQSEDHPHRRRRRGLECDGKVNICCKKQFFVSFKDIGWNDWIIAPSGYHANYCEGECPSHIAGTSGSSLSFHSTVINHYRMRGHSPFANLKSCCVPTKLRPMSMLYYDDGQNIIKKDIQNMIVEECGCS
MIPGNRMLMVVLLCQVLLGGASHASLIPETGKKKVAEIQGHAGGRRSGQSHELLRDFEATLLQMFGLRRRPQPSKSAVIPDYMRDLYRLQSGEEEEEQIHSTGLEYPERPASRANTVRSFHHEEHLENIPGTSENSAFRFLFNLSSIPENEVISSAELRLFREQVDQGPDWERGFHRINIYEVMKPPAEVVPGHLITRLLDTRLVHHNVTRWETFDVSPAVLRWTREKQPNYGLAIEVTHLHQTRTHQGQHVRISRSLPQGSGNWAQLRPLLVTFGHDGRGHALTRRRRAKRSPKHHSQRARKKNKNCRRHSLYVDFSDVGWNDWIVAPPGYQAFYCHGDCPFPLADHLNSTNHAIVQTLVNSVNSSIPKACCVPTELSAISMLYLDEYDKVVLKNYQEMVVEGCGCR
参考文献6:Han, Lu et al. “Single cell transcriptomics identifies a signaling network coordinating endoderm and mesoderm diversification during foregut organogenesis.” Nature communications vol. 11,1 4158. 27 Aug. 2020, doi:10.1038/s41467-020-17968-x
参考文献7:Takebe, Takanori et al. “Massive and Reproducible Production of Liver Buds Entirely from Human Pluripotent Stem Cells.” Cell reports vol. 21,10 (2017): 2661-2670. doi:10.1016/j.celrep.2017.11.005
参考文献8:小西 守周、他「細胞外分泌因子FGF21による生体機能調節」、インターネット<https://seikagaku.jbsoc.or.jp/10.14952/SEIKAGAKU.2016.880086/index.html>
参考文献9:Hui, Qi et al. “FGF Family: From Drug Development to Clinical Application.” International journal of molecular sciences vol. 19,7 1875. 26 Jun. 2018, doi:10.3390/ijms19071875
MVGVGGGDVEDVTPRPGGCQISGRGARGCNGIPGAAAWEAALPRRRPRRHPSVNPRSRAAGSPRTRGRRTEERPSGSRLGDRGRGRALPGGRLGGRGRGRAPERVGGRGRGRGTAAPRAAPAARGSRPGPAGTMAAGSITTLPALPEDGGSGAFPPGHFKDPKRLYCKNGGFFLRIHPDGRVDGVREKSDPHIKLQLQAEERGVVSIKGVCANRYLAMKEDGRLLASKCVTDECFFFERLESNNYNTYRSRKYTSWYVALKRTGQYKLGSKTGPGQKAILFLPMSAKS
別の態様において、本開示は、肺胞オルガノイドの作成にも利用可能な肺間葉細胞を含む細胞集団を提供する。本開示の間葉細胞を含む細胞集団は、RSPO2および/またはRSPO3を発現する肺間葉細胞を含む。
別の態様において、本開示は、前記肺間葉細胞を用いた肺胞上皮細胞の製造方法を提供する。本開示の肺胞上皮細胞の製造方法は、肺前駆細胞を、肺間葉細胞の存在下で培養して、肺胞上皮細胞への分化を誘導する工程を含み、前記肺間葉細胞は、本開示の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、本開示の間葉細胞を含む細胞集団である。
参考文献10:Hawkins et al., J Clin Invest. 2017 Jun 1;127(6):2277-2294. doi: 10.1172/JCI89950.
別の態様において、本開示は、II型肺胞上皮細胞を維持および/または拡大培養可能な方法を提供する。本開示のII型肺胞上皮細胞の維持および/または拡大培養方法は、II型肺胞上皮細胞を、肺間葉細胞の存在下で培養して、維持または拡大培養する工程(培養工程)を含み、前記肺間葉細胞は、本開示の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、本開示の間葉細胞を含む細胞集団である。
別の態様において、本開示は、肺間葉細胞を含む医薬組成物を提供する。本開示の医薬組成物は、前記本開示の肺間葉細胞と、薬学的に許容される担体とを含む。
別の態様において、本開示は、中胚葉細胞から肺間葉細胞の誘導に用いるための培地を提供する。本開示の中胚葉細胞から肺間葉細胞の誘導に用いるための培地は、培地と、間葉細胞の誘導因子と、KGFおよびFGF10とを含む。
別の態様において、本開示は、中胚葉細胞から肺間葉細胞の誘導に用いるためのキットを提供する。本開示の中胚葉細胞から肺間葉細胞の誘導に用いるためのキットは、間葉細胞の誘導因子と、KGFおよびFGF10とを含む。
本開示の製造方法により、肺間葉細胞を誘導できること、ならびに前記肺間葉細胞および前記肺前駆細胞を共培養することにより肺胞オルガノイドを形成できることを確認した。
図1(B)に示すように、前記肺間葉細胞は、ヒト由来iPS細胞(iPSC)から誘導した。具体的には、継代培養している未分化なヒトiPSCをD-PBS(ナカライテスク社製、Cat. No.: 14249-24)で洗浄した後、プロテアーゼ(Accutase、Innivative Cell Technologies社製、Cat. No.: AT-104)存在下、37℃で20分間インキュベートして、iPSCを単細胞に解した。mTeSR Plus(STEMCELL technologies社製、Cat. No.: ST-05825またはST-100-0276)を等量添加してプロテアーゼを中和した後、iPSCを含む細胞懸濁液を遠心分離して上清を除去した。その後、回収した細胞懸濁液を、iMatrix-511(0.25μg/cm2)および10μmol/lのY-27632(LC Laboratories社製、Cat. No.: Y-5301)を含むmTeSR Plusを用いて、8~15×104細胞の細胞密度で、6ウェルプレートに播種した(培養-1日目)。つぎに、培養0日目に、150ng/ml アクチビンA(API社製、Cat. No.: GF-001)、50ng/ml BMP4(R&D systems社製、Cat. No.: 314-BP)、1.5μmol/l CHIR99021(Axon Medchem社製、Cat. No.: Axon1386)、Glutamax(商標)(Thermo Fischer Scientific社製、Cat. No.: 35050061)、および50U/ml penicillin/streptomyciを添加したStemPro(商標)-34(Thermo Fischer Scientific社製、Cat. No.: 10639011)に培地を交換した。さらに、培養2日目に、同じ培地で培地交換をした。これにより、iPSCから中胚葉細胞を誘導した。以下、細胞の分化状態は、位相差顕微鏡を用いて確認した。
単細胞懸濁液を1%BSA含有PBSで洗浄後、一次抗体を用いて、4℃、15分の条件で染色した。1%BSA含有PBSで2回洗浄後、必要に応じて、二次抗体を用いて4℃、15分の条件で染色した。1%BSA含有PBSで2回洗浄後、ヨウ化プロピジウム(PI)で染色した。また、細胞内染色を行なう場合、細胞懸濁液をBD Cytofix/Cytoperm(BD Biosciences社製、Cat. No.:51-2090KZ)を用いて、20分間固定処理した後、BD Perm/Wash(BD Biosciences社製、Cat. No.:51-2091KZ)を用いて、20分間細胞膜の透過処理を行った。前記処理後、BD Perm/Washを用いて2回洗後、一次抗体を用いて、4℃、15分間の条件で染色した。つぎに、前記染色後の細胞懸濁液について、BD Perm/Washで2回洗浄後、二次抗体を用いて、4℃、15分間の条件で、染色した。1%BSA含有PBSを用いて2回洗浄後、PIを含まない1% BSA/PBSで細胞を調製した。得られた染色後のサンプルについて、Melody(BD Biosciences社製)を用いてフローサイトメトリー解析を行った。これらの結果を、図2~3に示す。
ヒトiPSC由来の肺前駆細胞への分化は、前記参考文献11および下記参考文献12~13に順じて実施した。具体的には、未分化のヒトiPSCを、Geltrexコーティングプレート上で、胚体内胚葉化培地の存在下、6日間培養して胚体内胚葉細胞に分化させた(Step1)。前記胚体内胚葉細胞への分化では、100ng/ml アクチビンA、1μmol/l CHIR99021、2% B27サプリメント(ThermoFisher社製、Cat. No.: 17504-001)、50U/ml penicillin/streptomycinを含有するRPMI1640(Nacalai Tesque社製、Cat. No.: 30264-56)培地を使用した。各培地は、以下、2日ごとに交換した。また、下記表2に示すように、前記胚体内胚葉細胞への分化において、培養0日目には、Y-27632を、培養1日目、2日目、および4日目には酪酸ナトリウム(Wako社製、Cat. 193-015122)を添加した。
参考文献12:Konishi, S., Gotoh, S., Tateishi, K., Yamamoto, Y., Korogi, Y., Nagasaki, T., Matsumoto, H., Muro, S., Hirai, T., Ito, I., et al. (2016). Directed Induction of Functional Multi-ciliated Cells in Proximal Airway Epithelial Spheroids from Human Pluripotent Stem Cells. Stem Cell Reports 6, 18-25.
参考文献13:Yamamoto, Y., Gotoh, S., Korogi, Y., Seki, M., Konishi, S., Ikeo, S., Sone, N., Nagasaki, T., Matsumoto, H., Muro, S., et al. (2017). Long-term expansion of alveolar stem cells derived from human iPS cells in organoids. Nat Methods 14, 1097-1106.
肺胞オルガノイドは、前記参考文献13および下記参考文献14に準じて作成した。1.0×104 CPM陽性細胞(201B7株PSC由来)と、5.0×105 胎児由来線維芽細胞(HFLF、DV Biologics社製、Cat No.: PP002-F-1349)、ヒト小児皮膚由来線維芽細胞(human pediatric dermal fibroblast:HDF、TIG120、国立研究開発法人 医薬基盤・健康栄養研究所から入手可能)、またはiMESとを、Y-27632(10μmol/l)および100μlのマトリゲル(Corning社製、Cat. No.: 354230)を添加した下記表3の肺胞化培地100μl中で混合した。得られた混合液を、12ウェルの細胞培養インサート(Corning社製、Cat. No.: 3513)上に導入した。そして、14日間培養した。下段のチャンバーの培地は、2日毎に交換した。前記HFLFは、10%FBS含有DMEM(Nacalai Tesque社製、Cat. No.: 08459-64)で培養し、継代数10の細胞を使用した。前記TIG120は、10%FBS含有MEM培地(Nacalai Tesque社製、Cat. No.: 21442-25)で培養し、PDL30以内の細胞を使用した。そして、得られた肺胞オルガノイドは、0.1% Tripsin-EDTAを用いて、37℃、15分間の条件で解離させた後、1%BSA含有PBSを用いて2回洗浄した。前記洗浄後、抗EpCAM-APC抗体(Miltenyi Biotec社製、Cat. No.: 130-113-263)で免疫染色した。前記染色後、フローサイトメーター(FACS)を用いて、SFTPC-GFP陽性細胞/EPCAM陽性細胞を分析した。また、前記肺胞オルガノイドについて、前記蛍光顕微鏡を用いて観察した。さらに、iPSC細胞株として、604A1細胞株を用いた以外は、同様にして肺胞オルガノイドを作成した。これらの結果を図6に示す。
参考文献14:Korogi, Y., Gotoh, S., Ikeo, S., Yamamoto, Y., Sone, N., Tamai, K., Konishi, S., Nagasaki, T., Matsumoto, H., Ito, I., et al. (2019). In Vitro Disease Modeling of Hermansky-Pudlak Syndrome Type 2 Using Human Induced Pluripotent Stem Cell-Derived Alveolar Organoids. Stem Cell Reports 12, 431-440.
他の細胞由来のiPSCから誘導したiMESを用いて、肺胞オルガノイドを形成できることを確認した。また、培養前後におけるiMESの発現プロファイルを解析した。
iPSCは、前記実施例1で用いたHFLFおよびHDFから誘導した。まず、HFLF-iPSC(HFA)は、HFLF(妊娠17.5週、DVバイオロジクス社製、Cat. No.: PP002-F-1349、ロット121109VA)から樹立した。1×106細胞のHFLFに対して、OCT3/4、SOX2、KLF4、L-MYC、LIN28、mp53-DD、およびEBNA1のcDNAを含むヒトiPSC作製用エピソーマルベクターミックス(Takara社製、Cat. No.: 3673)を、エレクトロポレーションにより導入した。前記導入後の細胞のうち5×104の細胞を、10%FBS含有DMEMを導入した6ウェルプレートの各ウェルに播種した(培養0日目)。前記培地は、培養1日目、培養3日目、培養および5日目に、10%FBS含有DMEMに交換した。また、培養6日目に、各ウェルの培地を、StemFit AK02N(味の素社製、Cat. No.: AJ100)に変更した。そして、得られたiPSCのコロニーをピックアップし、StemFit AK02NとiMatrix-511(タカラバイオ社製、Cat. No.: 892021)(0.25μg/cm2)を導入した12ウェルプレートの各ウェルに播種した。得られたiPSCは、StemFit AK02Nで維持および継代した。数回の継代後、各ウェルの培地を、mTeSR Plus(STEMCELL technologies社製、Cat. No.: ST-05825またはST-100-0276)に変更し、その後、前記iPSC(HFLF-iPSC)をiMESの誘導に用いた。
iPSCからiMESへの誘導は、iPSCとして、HFLF-iPSCs(HFA)およびHDF-iPSCs(GC23)を用いた以外は、前記実施例1(1)と同様にして実施した。得られたiMES、HFLF、およびHDFについて、前記実施例1(1)と同様にして、E-Cadherin、Vimentin(VIM)、およびFOXF1を染色後、蛍光顕微鏡により観察した。また、得られたiMESおよびHDFを用いた以外は、前記実施例1(1)と同様にして、PFGFRA、VIM、COL1A1、FOXF1、およびTBX4のmRNAを、HFLFを外因性コントロールとして、その相対発現量を定量した。また、得られたiMESについて、前記実施例1(1)と同様にして、フローサイトメトリーにより、VIM、THY1、PDGFRA、およびKDRの発現を検討した。これらの結果を図9に示す。
さらに、得られたiMES、HFLF、およびHDFを用いて、前記実施例1(3)と同様にして、肺胞オルガノイドを形成させた。前記肺胞オルガノイドについて、前記蛍光顕微鏡を用いて観察した。また、前記実施例1(3)と同様にして、前記肺胞オルガノイドを構成する細胞を解離させ、得られた細胞について、SFTPC-GFP陽性細胞/EPCAM陽性細胞を分析した。これらの結果を図10に示す。
iMESが、肺胞オルガノイド形成におけるフィーダ細胞として機能する要因を解析するため、肺胞オルガノイド形成アッセイ前後のHFLF、HFLF-iPSCs由来iMES、HDF-iPSCs由来iMES、およびHDFについて、RNA-Seq解析を実施した。具体的には、トータルRNAを、RNA抽出キット(RNeasy micro kit、Qiagen社製)を用いて、添付のプロトコルに従って抽出した。得られたRNAについて、TruSeq Stranded mRNA Library Prep Kit(illumina社製)を用いて、各サンプルのライブラリを調製した。得られたライブラリは、NovaSeq 6000(Illumina社製)を用いて100bpのペアエンドリードでシークエンスした。FASTQの生データについて、ソフトウェア(fastp 0.20.1、https://github.com/OpenGene/fastp#install-with-bioconda、参考文献15)を用いてトリミング後、ソフトウェア(SortMeRna 2.1b、https://github.com/biocore/sortmerna、参考文献16)を用いてrRNA、tRNA、snRNA、snoRNA、Mt_rRNA、およびMt_tRNAを除外した。前記前処理後のデータを、ソフトウェア(STAR 2.7.6a、https://github.com/alexdobin/STAR、参考文献17)を用いてGRCh38にアラインメントした。得られたアライメントデータとソフトウェア(RSEM 1.3.3、https://github.com/deweylab/RSEM、参考文献18)とを用いて、transcripts per million (TPM)とread countを算出した。これらのデータをソフトウェア(tximport 1.20.0、https://github.com/mikelove/tximport、参考文献19)を用いて R 4.1.1(http://www.R-project.org)にインポートした。つぎに、インポートしたデータセットのサンプルの平均リード数が、1以下の低発現遺伝子を検出限界以下として、解析対象から除外した。前記除外後、ソフトウェア(DESeq2 1.32.0、https://github.com/mikelove/DESeq2、参考文献20)を用いてDEGs(参考文献21)を同定した。そして、DESeq2で算出されたp値の順番でソートした遺伝子を用いてpre-ranked GSEAを行った。GOエンリッチメント分析は、ソフトウェア(clusterProfiler 4.0.5、https://github.com/YuLab-SMU/clusterProfiler、参考文献22)およびorg.Hs.eg.db 3.13.0(https://anaconda.org/bioconda/bioconductor-org.hs.eg.db)を用いて実施した。これらの結果を図11に示す。
参考文献15:Chen, S., Zhou, Y., Chen, Y., and Gu, J. (2018). fastp: an ultra-fast all-in-one FASTQ preprocessor. Bioinformatics 34, i884-i890.
参考文献16:Kopylova, E., Noe, L., and Touzet, H. (2012). SortMeRNA: fast and accurate filtering of ribosomal RNAs in metatranscriptomic data. Bioinformatics 28, 3211-3217.
参考文献17:Dobin, A., Davis, C.A., Schlesinger, F., Drenkow, J., Zaleski, C., Jha, S., Batut, P., Chaisson, M., and Gingeras, T.R. (2013). STAR: ultrafast universal RNA-seq aligner. Bioinformatics 29, 15-21.
参考文献18:Li, B., and Dewey, C.N. (2011). RSEM: accurate transcript quantification from RNA-Seq data with or without a reference genome. BMC Bioinformatics 12, 323.
参考文献19:Soneson, C., Love, M.I., and Robinson, M.D. (2015). Differential analyses for RNA-seq: transcript-level estimates improve gene-level inferences. F1000Res 4, 1521.
参考文献20:Subramanian, A., Tamayo, P., Mootha, V.K., Mukherjee, S., Ebert, B.L., Gillette, M.A., Paulovich, A., Pomeroy, S.L., Golub, T.R., Lander, E.S., et al. (2005). Gene set enrichment analysis: a knowledge-based approach for interpreting genome-wide expression profiles. Proc Natl Acad Sci U S A 102, 15545-15550.
参考文献21:Love, M.I., Huber, W., and Anders, S. (2014). Moderated estimation of fold change and dispersion for RNA-seq data with DESeq2. Genome Biol 15, 550.
参考文献22:Wu, T., Hu, E., Xu, S., Chen, M., Guo, P., Dai, Z., Feng, T., Zhou, L., Tang, W., Zhan, L., et al. (2021). clusterProfiler 4.0: A universal enrichment tool for interpreting omics data. The Innovation 2.
本発明者らは、WntリガンドおよびTGFβファミリーリガンドのアンタゴニスト等がII型肺胞上皮細胞の分化に寄与しているとの知見を有している。そこで、前記RNA-seqのデータにおいて、3D培養後のWntリガンドの発現を比較した。この結果を図12および下記表5に示す。
マウスでは、異なるタイプの間葉細胞が同定されている(筋線維性細胞、mesenchymal alveolar niche cell細胞、参考文献23~24)。そこで、前記参考文献23~24で公開されているscRNA-seqの公開データを解析し、iMESがいずれのタイプの間葉細胞に類似しているかを検討した。具体的には、Secondary crest myofibroblast(SCMF)、Wnt2-Pα細胞、およびmesenchymal alveolar niche cell(MANC)の3種類の間葉系細胞を再クラスタリングし、各系統の細胞クラスタで有意に上昇した遺伝子をピックアップした。つぎに、各間葉細胞のクラスタの特徴を示す遺伝子セットを構築した。そして、ソフトウェア(biomaRt、https://github.com/grimbough/biomaRt、参考文献25)を用いて、マウスの遺伝子を対応するヒトの遺伝子に変換した後、iMES、HFLFおよびHDFのscRNA-seq解析のデータを用いてGSEAを行った。具体的には、scRNA-seqデータは、GSE149563からダウンロードした。遺伝子発現データの正規化、次元削減、およびデータの可視化は、Seurat 4.0.5および Plotly 4.9.4.1を用いて実施した。各クラスタにおける発現上昇遺伝子は、P<0.05のカットオフ値でWilcoxonの順位和検定を用いてSeuratの関数FindAllMarkersでピックアップし、25%以上の細胞で発現している遺伝子を抽出した。前記抽出後、抽出されたマウス遺伝子は、biomaRt 2.48.3を用いてヒト遺伝子に変換した。この結果を図14に示す。
参考文献23:Zepp, J.A., Morley, M.P., Loebel, C., Kremp, M.M., Chaudhry, F.N., Basil, M.C., Leach, J.P., Liberti, D.C., Niethamer, T.K., Ying, Y., et al. (2021). Genomic, epigenomic, and biophysical cues controlling the emergence of the lung alveolus. Science 371.
参考文献24:Zepp, J.A., Zacharias, W.J., Frank, D.B., Cavanaugh, C.A., Zhou, S., Morley, M.P., and Morrisey, E.E. (2017). Distinct Mesenchymal Lineages and Niches Promote Epithelial Self-Renewal and Myofibrogenesis in the Lung. Cell 170, 1134-1148 e1110.
参考文献25:Durinck, S., Spellman, P.T., Birney, E., and Huber, W. (2009). Mapping identifiers for the integration of genomic datasets with the R/Bioconductor package biomaRt. Nat Protoc 4, 1184-1191.
iMESを用いて、肺胞上皮細胞を維持培養できることを確認した。
iMESと、肺胞上皮細胞とのリガンド-ターゲットおよびリガンド-レセプターの相互作用を解析した。
参考文献26:Hao, Y., Hao, S., Andersen-Nissen, E., Mauck, W.M., 3rd, Zheng, S., Butler, A., Lee, M.J., Wilk, A.J., Darby, C., Zager, M., et al. (2021). Integrated analysis of multimodal single-cell data. Cell 184, 3573-3587 e3529.
参考文献27:Browaeys, R., Saelens, W., and Saeys, Y. (2020). NicheNet: modeling intercellular communication by linking ligands to target genes. Nat Methods 17, 159-162.
参考文献28:Cao, J., Spielmann, M., Qiu, X., Huang, X., Ibrahim, D.M., Hill, A.J., Zhang, F., Mundlos, S., Christiansen, L., Steemers, F.J., et al. (2019). The single-cell transcriptional landscape of mammalian organogenesis. Nature 566, 496-502.
参考文献29:Du, Y., Ouyang, W., Kitzmiller, J.A., Guo, M., Zhao, S., Whitsett, J.A., and Xu, Y. (2021). Lung Gene Expression Analysis Web Portal Version 3: Lung-at-a-Glance. Am J Respir Cell Mol Biol 64, 146-149.
I型肺胞上皮細胞では、NAMPTとTGFB1とが、それぞれ、INSRとTGFBR1/2/3と相互作用していた。また、図17(B)に示すように、II型肺胞上皮細胞では、TGFB2、HAS2、およびCTF1が、それぞれ、TGFBR1/2/3、CD44、およびIL6ST/LIFRと相互作用していた。これらの結果から、iMESに発現するリガンドが、肺胞上皮細胞と相互作用し、各ターゲットマーカー遺伝子の発現に関与していることを裏付けている。さらに、図17(C)に示すように、I型肺胞上皮細胞、II型肺胞上皮細胞、ASCL1陽性細胞、および繊毛上皮細胞の分化の軌跡を推定すると、I型肺胞上皮細胞、ASCL1陽性細胞、および繊毛上皮細胞は、II型肺胞上皮細胞のクラスタを中心にして分岐しており、II型肺胞上皮細胞から派生する細胞、すなわち、II型肺胞上皮細胞から分化している細胞であることが示唆された。
間葉細胞の誘導因子と、KGFおよびFGF10とを組み合わせることにより、中胚葉細胞から肺間葉細胞を効率よく誘導できることを確認した。
前記中胚葉細胞から肺間葉細胞の誘導において、アクチビンA(AA)、KGF、BMP4、FGF2、およびFGF10のいずれか1つを除いた以外は、前記実施例1(1)と同様にして、間葉細胞を誘導した。
前記肺前駆細胞の誘導は、iPSCとして、B2-3株を用いた以外は、前記実施例1(2)と同様にして実施した。
前記実施例5(1)の肺間葉細胞および前記実施例5(2)の肺前駆細胞を用いた以外は、前記実施例1(3)と同様にして、肺胞オルガノイドを形成した。そして、得られた肺胞オルガノイドを構成する細胞を単離して、前記実施例1(3)と同様にして、SFTPC-GFP陽性細胞/EPCAM陽性細胞を分析した。この結果を図18に示す。
上記の実施形態および実施例の一部または全部は、以下の付記のように記載されうるが、以下には限られない。
<肺間葉細胞の製造方法>
(付記1)
中胚葉細胞を、間葉細胞の誘導因子とKGFおよびFGF10との存在下で培養し、肺間葉細胞への分化を誘導する工程を含む、肺間葉細胞の製造方法。
(付記2)
前記中胚葉細胞から誘導された細胞集団から、EpCAMおよび/またはE-cadherin陰性の肺間葉細胞を富化する工程を含む、付記1に記載の肺間葉細胞の製造方法。
(付記3)
前記富化は、EpCAMおよび/またはE-cadherin陰性の肺間葉細胞を50%以上含む細胞集団への富化である、付記2に記載の肺間葉細胞の製造方法。
(付記4)
前記肺間葉細胞は、RSPO2(R-Spondin 2)および/またはRSPO3(R-Spondin 3)を発現する、付記1から3のいずれかに記載の肺間葉細胞の製造方法。
(付記5)
前記肺間葉細胞は、FOXF1(Forkhead box protein F1)、TCF21(Transcription factor 21)、TBX4(T-Box Transcription Factor 4)、および、OSR1(Odd-Skipped Related Transcription Factor)からなる群から選択される転写因子を発現する、付記1から4のいずれかに記載の肺間葉細胞の製造方法。
(付記6)
前記肺間葉細胞は、RSPO2(R-Spondin 2)、RSPO3(R-Spondin 3)、FOXF1(Forkhead box protein F1)、TCF21(Transcription factor 21)、TBX4(T-Box Transcription Factor 4)、および、OSR1(Odd-Skipped Related Transcription Factor)からなる群から選択される少なくとも一つの因子を発現する、付記1から3のいずれかに記載の肺間葉細胞の製造方法。
(付記7)
前記肺間葉細胞は、WNT2を発現しない、付記1から6のいずれかに記載の肺間葉細胞の製造方法。
(付記8)
前記肺間葉細胞は、TBXT(T-box transcription factor T)を発現しない、付記1から7のいずれかに記載の肺間葉細胞の製造方法。
(付記9)
前記肺間葉細胞は、NCAM(neural cell adhesion molecule)、ADRP(Adipose differentiation-related protein)、COL1A1(Collagen, type I, alpha 1)、およびACTA2(actin alpha 2)からなる群から選択される線維芽細胞マーカーを発現する、付記1から8のいずれかに記載の肺間葉細胞の製造方法。
(付記10)
前記肺間葉細胞は、VIM(Vimentin)、THY1(Thy-1 Cell Surface Antigen、CD90)、PDGFRα(Platelet Derived Growth Factor Receptor α)、およびKDR(Kinase Insert Domain Receptor)からなる群から選択される間葉細胞マーカー陽性である、付記1から9のいずれかに記載の肺間葉細胞の製造方法。
(付記11)
前記間葉細胞の誘導因子は、アクチビンA、FGF2、およびBMP4からなる群から選択される因子を含む、付記1から10のいずれかに記載の肺間葉細胞の製造方法。
(付記12)
前記肺間葉細胞は、肺前駆細胞との共培養による肺胞オルガノイド形成アッセイにおいて、前記肺前駆細胞から、I型肺胞上皮細胞および/またはII型肺胞上皮細胞を誘導可能である、付記1から11のいずれかに記載の肺間葉細胞の製造方法。
(付記13)
前記肺間葉細胞の誘導に先立ち、多能性細胞を、中胚葉誘導因子の存在下で培養し、前記中胚葉細胞への分化を誘導する工程を含む、付記1から12のいずれかに記載の間葉細胞の製造方法。
(付記14)
前記中胚葉誘導因子は、GSK3β阻害剤、アクチビンA、およびBMP4からなる群から選択される因子を含む、付記13に記載の間葉細胞の製造方法。
(付記15)
前記GSK3β阻害剤は、CHIR99021である、付記14に記載の間葉細胞の製造方法。
<肺間葉細胞>
(付記16)
RSPO2(R-Spondin 2)および/またはRSPO3(R-Spondin 3)を発現する肺間葉細胞を含む、間葉細胞を含む細胞集団。
(付記17)
前記肺間葉細胞は、FOXF1(Forkhead box protein F1)、TCF21(Transcription factor 21)、TBX4(T-Box Transcription Factor 4)、および、OSR1(Odd-Skipped Related Transcription Factor)からなる群から選択される転写因子を発現する、付記16に記載の細胞集団。
(付記18)
前記肺間葉細胞は、RSPO2およびRSPO3を発現する、付記16または17に記載の細胞集団。
(付記19)
FOXF1(Forkhead box protein F1)、TCF21(Transcription factor 21)、TBX4(T-Box Transcription Factor 4)、および、OSR1(Odd-Skipped Related Transcription Factor)からなる群から選択される少なくとも一つの転写因子を発現する肺間葉細胞を含む、間葉細胞を含む細胞集団。
(付記20)
前記肺間葉細胞は、EpCAMおよび/またはE-cadherin陰性である、付記16から19のいずれかに記載の細胞集団。
(付記21)
前記細胞集団の全細胞に対するEpCAMおよび/またはE-cadherin陰性の肺間葉細胞の割合(細胞数)が、50%以上である、付記20に記載の細胞集団。
(付記22)
前記肺間葉細胞は、Wnt2を発現しない、付記16から21のいずれかに記載の細胞集団。
(付記23)
前記肺間葉細胞は、TBXT(T-box transcription factor T)を発現しない、付記16から22のいずれかに記載の細胞集団。
(付記24)
前記肺間葉細胞は、NCAM(neural cell adhesion molecule)、ADRP(Adipose differentiation-related protein)、COL1A1(Collagen, type I, alpha 1)、およびACTA2(actin alpha 2)からなる群から選択される少なくとも一つの線維芽細胞マーカーを発現する、付記16から23のいずれかに記載の細胞集団。
(付記25)
前記肺間葉細胞は、VIM(Vimentin)、THY1(Thy-1 Cell Surface Antigen、CD90)、PDGFRα(Platelet Derived Growth Factor Receptor α)、およびKDR(Kinase Insert Domain Receptor)からなる群から選択される少なくとも一つの間葉細胞マーカー陽性である、付記16から24のいずれかに記載の細胞集団。
(付記26)
前記肺間葉細胞は、肺前駆細胞との共培養による肺胞オルガノイド形成アッセイにおいて、前記肺前駆細胞からI型肺胞上皮細胞および/またはII型肺胞上皮細胞を誘導可能である、付記16から25のいずれかに記載の細胞集団。
<肺胞上皮細胞の製造方法>
(付記27)
肺前駆細胞を、肺間葉細胞の存在下で培養して、肺胞上皮細胞への分化を誘導する工程を含み、
前記肺間葉細胞は、付記1から15のいずれかに記載の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、付記16から26のいずれかに記載の間葉細胞を含む細胞集団である、肺上皮細胞の製造方法。
(付記28)
前記肺胞上皮細胞は、I型肺胞上皮細胞、および/または、II型肺胞上皮細胞である、付記27に記載の製造方法。
(付記29)
前記肺胞上皮細胞は、肺胞オルガノイドを構成している肺胞上皮細胞である、付記27または28に記載の製造方法。
(付記30)
前記肺前駆細胞は、NKX2-1陽性および/またはCPM陽性である、付記27から29のいずれかに記載の製造方法。
(付記31)
前記肺前駆細胞を、前記肺間葉細胞および肺胞上皮細胞の誘導因子の存在下で培養して、前記肺胞上皮細胞への分化を誘導する、付記27から30のいずれかに記載の製造方法。
(付記32)
前記肺胞上皮細胞の誘導因子は、Wnt促進剤、ステロイド剤、cAMP誘導体、ホスホジエステラーゼ阻害剤、KGF、GSK3β阻害剤、TGFβ阻害剤、ROCK阻害剤、および/またはFGF10である、付記31に記載の製造方法。
<医薬組成物>
(付記33)
付記1から15のいずれかに記載の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、付記16から26のいずれかに記載の間葉細胞を含む細胞集団と、薬学的に許容される担体とを含む、医薬組成物。
<II型肺胞上皮細胞の維持培養方法>
(付記34)
II型肺胞上皮細胞を、肺間葉細胞の存在下で培養して、維持培養する工程を含み、
前記肺間葉細胞は、付記1から15のいずれかに記載の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、付記16から26のいずれかに記載の間葉細胞を含む細胞集団である、II型肺胞上皮細胞の維持培養方法。
(付記35)
前記II型肺胞上皮細胞は、SFTPC陽性細胞である、付記34に記載の維持培養方法。
(付記36)
前記II型肺胞上皮細胞を、前記肺間葉細胞および肺胞上皮細胞の誘導因子の存在下で培養して、維持培養する、付記34または35に記載の維持培養方法。
(付記37)
前記肺胞上皮細胞の誘導因子は、Wnt促進剤、ステロイド剤、cAMP誘導体、ホスホジエステラーゼ阻害剤、KGF、GSK3β阻害剤、TGFβ阻害剤、ROCK阻害剤、FGF10、および/またはEGFである、付記36に記載の維持培養方法。
<II型肺胞上皮細胞の拡大培養方法>
(付記38)
II型肺胞上皮細胞を、肺間葉細胞の存在下で培養して、拡大培養する工程を含み、
前記肺間葉細胞は、付記1から15のいずれかに記載の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、付記16から26のいずれかに記載の間葉細胞を含む細胞集団である、II型肺胞上皮細胞の拡大培養方法。
(付記39)
前記II型肺胞上皮細胞は、SFTPC陽性細胞である、付記38に記載の拡大培養方法。
(付記40)
前記II型肺胞上皮細胞を、前記肺間葉細胞および肺胞上皮細胞の誘導因子の存在下で培養して、拡大培養する、付記38または39に記載の拡大培養方法。
(付記41)
前記肺胞上皮細胞の誘導因子は、Wnt促進剤、ステロイド剤、cAMP誘導体、ホスホジエステラーゼ阻害剤、KGF、GSK3β阻害剤、TGFβ阻害剤、ROCK阻害剤、FGF10、および/またはEGFである、付記40に記載の拡大培養方法。
<培地>
(付記42)
中胚葉細胞から肺間葉細胞を誘導するための培地であって、
培地(基礎培地)と、間葉細胞の誘導因子と、KGFおよびFGF10とを含む、培地。
(付記43)
前記間葉細胞の誘導因子は、アクチビンA、FGF2、およびBMP4からなる群から選択される因子を含む、付記42に記載の培地。
<キット>
(付記44)
中胚葉細胞から肺間葉細胞を誘導するためのキットであって、
間葉細胞の誘導因子と、KGFおよびFGF10とを含む、キット。
(付記45)
前記間葉細胞の誘導因子は、アクチビンA、FGF2、およびBMP4からなる群から選択される因子を含む、付記44に記載のキット。
Claims (12)
- 中胚葉細胞を、間葉細胞の誘導因子とKGFおよびFGF10との存在下で培養し、肺間葉細胞への分化を誘導する工程を含む、肺間葉細胞の製造方法。
- 前記中胚葉細胞から誘導された細胞集団から、EpCAMおよび/またはE-cadherin陰性の肺間葉細胞を富化する工程を含む、請求項1に記載の肺間葉細胞の製造方法。
- 前記富化は、EpCAMおよび/またはE-cadherin陰性の肺間葉細胞を50%以上含む細胞集団への富化である、請求項2に記載の肺間葉細胞の製造方法。
- 前記肺間葉細胞は、RSPO2(R-Spondin 2)、RSPO3(R-Spondin 3)、FOXF1(Forkhead box protein F1)、TCF21(Transcription factor 21)、TBX4(T-Box Transcription Factor 4)、および、OSR1(Odd-Skipped Related Transcription Factor)からなる群から選択される少なくとも一つの因子を発現する、請求項1から3のいずれか一項に記載の肺間葉細胞の製造方法。
- 前記間葉細胞の誘導因子は、アクチビンA、FGF2、およびBMP4からなる群から選択される因子を含む、請求項1から4のいずれか一項に記載の肺間葉細胞の製造方法。
- 前記肺間葉細胞の誘導に先立ち、多能性細胞を、中胚葉誘導因子の存在下で培養し、前記中胚葉細胞への分化を誘導する工程を含む、請求項1から5のいずれか一項に記載の間葉細胞の製造方法。
- RSPO2(R-Spondin 2)および/またはRSPO3(R-Spondin 3)を発現する肺間葉細胞を含む、間葉細胞を含む細胞集団。
- FOXF1(Forkhead box protein F1)、TCF21(Transcription factor 21)、TBX4(T-Box Transcription Factor 4)、および、OSR1(Odd-Skipped Related Transcription Factor)からなる群から選択される少なくとも一つの転写因子を発現する肺間葉細胞を含む、間葉細胞を含む細胞集団。
- 前記肺間葉細胞は、EpCAM陰性である、請求項7または8に記載の細胞集団。
- 前記肺間葉細胞は、肺前駆細胞との共培養による肺胞オルガノイド形成アッセイにおいて、前記肺前駆細胞からI型肺胞上皮細胞および/またはII型肺胞上皮細胞を誘導可能である、請求項7から9のいずれか一項に記載の細胞集団。
- 肺前駆細胞を、肺間葉細胞の存在下で培養して、肺胞上皮細胞への分化を誘導する工程を含み、
前記肺間葉細胞は、請求項1から6のいずれか一項に記載の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、請求項7から10のいずれか一項に記載の間葉細胞を含む細胞集団である、肺上皮細胞の製造方法。 - II型肺胞上皮細胞を、肺間葉細胞の存在下で培養して、拡大培養する工程を含み、
前記肺間葉細胞は、請求項1から6のいずれか一項に記載の肺間葉細胞の製造方法により得られた肺間葉細胞、および/または、請求項7から10のいずれか一項に記載の間葉細胞を含む細胞集団である、II型肺胞上皮細胞の拡大培養方法。
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CN116855455B (zh) * | 2023-09-01 | 2023-11-24 | 再少年(北京)生物科技有限公司 | iPS诱导定向分化成神经干细胞(iNSC)的方法及应用 |
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