WO2007119759A1 - ドーパミン産生ニューロン前駆細胞マーカー187a5 - Google Patents
ドーパミン産生ニューロン前駆細胞マーカー187a5 Download PDFInfo
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- WO2007119759A1 WO2007119759A1 PCT/JP2007/058009 JP2007058009W WO2007119759A1 WO 2007119759 A1 WO2007119759 A1 WO 2007119759A1 JP 2007058009 W JP2007058009 W JP 2007058009W WO 2007119759 A1 WO2007119759 A1 WO 2007119759A1
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
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- A61K35/30—Nerves; Brain; Eyes; Corneal cells; Cerebrospinal fluid; Neuronal stem cells; Neuronal precursor cells; Glial cells; Oligodendrocytes; Schwann cells; Astroglia; Astrocytes; Choroid plexus; Spinal cord tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
- A61P25/16—Anti-Parkinson drugs
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- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
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- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6881—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for tissue or cell typing, e.g. human leukocyte antigen [HLA] probes
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- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5044—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics involving specific cell types
- G01N33/5058—Neurological cells
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/569—Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
- G01N33/56966—Animal cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
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- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/158—Expression markers
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
- G01N2333/70571—Assays involving receptors, cell surface antigens or cell surface determinants for neuromediators, e.g. serotonin receptor, dopamine receptor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S530/00—Chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof
- Y10S530/81—Carrier - bound or immobilized peptides or proteins and the preparation thereof, e.g. biological cell or cell fragment as carrier
Definitions
- the present invention relates to the 187A5 gene, which is a donomin-producing / euron progenitor cell marker, and in particular, to a means for detecting dopaminergic neuron progenitor cells, and a method and kit for detecting the cells.
- the dopamine system is a very important system involved in motor regulation, hormone secretion regulation, emotion regulation and the like important in the mammalian brain.
- abnormalities in dopaminergic neurotransmission cause various nervous system disorders.
- Parkinson's disease is an extrapyramidal neurodegenerative disease caused by specific loss of midbrain substantia nigra dopaminergic neurons (HARRISON'S PRINCIPLES OF INTERNAL MEDICINE 2nd edition 2nd edition, Isselbacher et al Ed. McGraw- Hilllnc., NY (1994) pp. 2275-7).
- L dopa (3, 4-dihydroxyphenol-lanalanin) is orally administered to compensate for a decrease in the amount of donomin produced. It is known that the sustainability is not good.
- ES cell-derived donomin production-euron has also been confirmed to be functional by transplantation into the lesion striatum of a rat Parkinson's disease model (Kim et al. (2002) Nature 418: 50-56). In the future, it seems that the importance of regenerative treatment of ES cells or the neural stem cell power of the patient himself will increase.
- Dopamine production-selective enrichment / separation of euron Dopamine production-gene promoters such as tyrosine neuroxylase (TH) expressed in euron
- TH tyrosine neuroxylase
- a reporter that expresses a fluorescent protein under the control of a cell is introduced into each cell of the cell population, and the cells that emit fluorescence are separated, thereby visualizing and concentrating and separating the dominamine production-euron alive.
- an identification method Japanese Patent Publication No. 2002-51775
- this method necessitates a complicated process of introducing a foreign gene.
- the presence of a reporter gene is a toxic and immunogenic feature. Is also a problem.
- Lrp4 is a gene that is expressed in dopaminergic-euron proliferative progenitor cells.
- dopaminergic-euron progenitor cells preferably dopaminergic-neuron proliferative progenitor cells
- the inventors From the ventral side of the embryonic midbrain and ventral side of the hindbrain, cells that are positive for Lrp4 protein, a dopamine production-euron proliferative progenitor cell marker gene, were isolated and put into the midbrain by the subtraction (N-RD A) method, As a result of searching for genes specific to Lrp4-positive cells, we found a gene (187A5 gene (sometimes simply referred to as “187A5” in this document)) that is selectively expressed in dopaminergic neuron proliferative progenitor cells. (Example 2). The present invention is based on this finding.
- the present invention relates to a means for detecting donomin producing-euron progenitor cells (preferably dopamine producing-euron proliferative progenitor cells), dopamine producing-euron progenitor cells (preferably donomin producing-euron proliferating progenitor cells) And a detection kit for dopaminergic production-euron progenitor cells (preferably dopaminergic production-euron proliferative progenitor cells).
- donomin producing-euron progenitor cells preferably dopamine producing-euron proliferative progenitor cells
- dopamine producing-euron progenitor cells preferably donomin producing-euron proliferating progenitor cells
- dopaminergic production-euron progenitor cells preferably dopaminergic production-euron proliferative progenitor cells
- Another object of the present invention is to provide a screening method for a substance effective for inducing differentiation of dopaminergic-euron progenitor cells (preferably dopaminergic-neuron proliferative progenitor cells).
- donomin producing-euron precursor cells preferably dopamine producing-euron proliferating progenitor cells
- 187A5 gene a polynucleotide (hereinafter, sometimes referred to as "187A5 gene” t) in which the following (i), (ii), (iii), and (iv) force are also selected.
- nucleotide sequence represented by SEQ ID NO: 1 one or more nucleotides are inserted, substituted, or deleted, and / or one or more nucleotides are attached to one or both ends thereof.
- the present invention also provides a protein (hereinafter sometimes referred to as "187A5 protein") in which the following (V) (vi) (vii) and (viii) force are also selected. Is:
- (V) a protein comprising the amino acid sequence represented by SEQ ID NO: 2;
- amino acid sequence represented by SEQ ID NO: 2 one or more amino acids are inserted, substituted, or deleted, and Z or one or more amino acids are attached to one or both ends thereof.
- a protein comprising an amino acid sequence having 70% or more identity with the amino acid sequence represented by SEQ ID NO: 2 and having the same function as the protein comprising the amino acid sequence represented by SEQ ID NO: 2.
- the present invention is used for detection or selection of a dopaminergic-rong progenitor cell (preferably dopaminergic-rhn progenitor cell) that can be hybridized to the nucleotide sequence of the 187A5 gene or its complementary sequence.
- Probes or plies hereinafter sometimes referred to as “probes according to the invention” and “primers according to the invention”, respectively).
- an antibody having a binding property to the 187A5 protein (hereinafter referred to as "the antibody according to the present invention") used for detection or selection of dopamine-producing Ron progenitor cells (preferably dopamine-producing neuron proliferative progenitor cells). Is sometimes provided).
- a method for detecting or selecting domin producing-Lon progenitor cells comprising the step of detecting expression of 187A5 gene or 187A5 protein (
- the detection method according to the present invention is provided.
- a dopaminergic-Lon progenitor cell preferably, dopaminergic-Lon proliferative progenitor cell
- a kit for selection (hereinafter “detection kit according to the present invention” t) may be provided.
- a dopaminergic-Lon progenitor cell (preferably, a dopaminergic-Lon proliferative progenitor cell) comprising at least a probe, primer, primer set, or antibody according to the present invention is detected or detected.
- Reagents for selection hereinafter sometimes referred to as “detection reagents according to the present invention”.
- a method for producing domin-producing Ron precursor cells preferably dopaminergic neuron proliferative progenitor cells used for the treatment of Parkinson's disease.
- the probe, ply ply set, and antibody according to the present invention can be used in the midbrain as a marker specific for dopaminergic pro-Lon progenitor cells, preferably dopaminergic progenitor-Lon progenitor cells. Therefore, the present invention is extremely useful in the development of a method for inducing the purity of transplanted materials and in vitro induction of domin producing-Lon progenitor cells, preferably dopamine producing-Lon proliferating progenitor cells. This greatly contributes to promoting the practical application of regenerative medicine.
- the protein according to the present invention expresses a part of a protein that is not simply expressed outside the cell. Therefore, it is possible to reliably detect living cells by using the extracellular region of the protein according to the present invention as an index, and to separate and acquire the cells, which can be said to contribute greatly to the practical application of regenerative medicine.
- FIG. 1 is a diagram showing the expression timing of a dominogenic neuron-related marker gene.
- FIG. 2 shows the results of analysis of Lrp4 TH protein expression in the midbrain and hindbrain of rat 14.5-day embryos by immunostaining.
- FIG. 3 shows the results of RT-PCR analysis of mRNA expression of 187A5, Lmxla, and Lrp4 in midbrain and hindbrain Lrp4-positive cells.
- FIG. 4 shows the results of in situ hybridization analysis of 187A5 and Lrp4 mRNA expression in the midbrain and hindbrain of mouse 12.5 day embryos.
- ES cell force is also a diagram showing the results of RT-PCR analysis of 187A5, Lmxla and Lrp4 mRNA expression in dopamine-producing euron proliferative progenitor cells induced by the SDIA method.
- FIG. 6 shows the results of RT-PCR analysis of mRNA expression of 187A5, Lmxla, and Lrp4 in dopamine-producing euron precursor cells that were induced from ES cells by the 5-stage method.
- FIG. 7 shows mice 187A5 and 187A5-SEAP.
- FIG. 8 is a diagram showing the results of analyzing the signal sequence activity of 187A5.
- FIG. 9 is a diagram showing the results of analyzing the cell surface expression of 187A51 protein by the method of modification of cell surface protein with pyotin ⁇ .
- FIG. 10 shows the results of FACS analysis of cell surface expression of 187A5 protein.
- the part surrounded by a frame in the figure shows 187A5-expressing cells.
- FIG. 11 shows the results of an immunostaining analysis of the expression of 187A5 protein in the midbrain and hindbrain ventral side of mouse 11.5-day embryos.
- FIG. 12 shows the results of FACS analysis of the expression of 187A5 and Lrp4 proteins in the midbrain and ventral hindbrain of mouse 12.5 day embryos.
- This figure shows the results of FACS analysis of the expression of 187A5 and Lrp4 proteins in dopamine production-euron proliferative progenitor cells induced by ES cell differentiation by the SDIA method.
- FIG. 14 shows the results of isolating and culturing 187A5ZLrp4 co-positive cells in which ES cell force was also induced by the SDIA method.
- dopamine-producing Ron precursor cells to be detected or selected means dopamine-producing Ron cells before maturation.
- the "dopaminergic-lon-proliferating progenitor cell” that is the object of detection or selection means a dopaminergic neuron progenitor cell before mitotic arrest.
- Dopamine-producing Ron is separated from neuroepithelial cells into proliferative progenitor cells and progenitor cells after mitosis, and then into mature domin producing Ron.
- Dopaminergic neuron progenitor cells are progenitor cells of dominin producing neurons. Among them, dopaminergic progenitor-lon progenitor cells are the earliest progenitor cells of dopaminergic progenitor-Lon. High survival rate and high network formation ability can be expected. Therefore, dopaminergic neuron progenitor cells, especially domininergic neuron proliferative progenitor cells, are useful for transplantation treatment of diseases caused by decreased dopamine due to degenerative loss of dopaminergic neurons such as Parkinson's disease.
- the cells selected using the probe, ply-ply set, or antibody according to the present invention as an index are dopamine-producing Ron progenitor cells, a conventional mixed cell population or dopamine-producing neurons into which a foreign gene has been introduced. Compared to progenitor cells, it is preferable for transplantation treatment of neurodegenerative diseases such as Parkinson's disease in terms of safety, survival rate, and network formation ability.
- cells detected or selected with a probe, ply-ply set, or antibody according to the present invention produce dopamine- Euron progenitor cells, i.e.
- proliferating donomin progenitors-euron progenitor cells may mature in optimal locations in the brain, and may be further in vivo Since progenitor neuron progenitor cells may proliferate, long-term therapeutic effects can be expected. Therefore, it can be said that the present invention opens the way to the practical application of effective transplantation treatment for neurodegenerative diseases such as Parkinson's disease.
- 187A5 gene means a gene encoding 187A5 protein, and includes not only cDNA but also genomic DNA. The corresponding RNA is also included.
- 187A5 gene which is an indicator of the presence of dopaminergic-euron progenitor cells, is registered in the database as a sequence whose function is unknown in mice, but human, rat, ushi, inu, In chimpanzees and the like, the sequence is only predicted. Each sequence is disclosed!
- GenBank accession numbers are as follows.
- AK028289 (SEQ ID NO: 11, SEQ ID NO: 12), AK157823 (SEQ ID NO: 13 (base sequence)), AK028541 (SEQ ID NO: 14, SEQ ID NO: 15), AK035053 (SEQ ID NO: 16, SEQ ID NO :) 17), XM—485684 (SEQ ID NO: 18, SEQ ID NO: 19), AK163356 (SEQ ID NO: 20 (base sequence))
- the human 187 A5 gene cDNA sequence (as a gene selectively expressed in dopamine producing-euron progenitor cells (preferably donomin producing-euron proliferative progenitor cells) in the midbrain region ( SEQ ID NO: 1), also donomin production-euron progenitor cells ( Preferably, the amino acid sequence (SEQ ID NO: 2) of human 187A5 protein (polypeptide) was determined as a protein (polypeptide) that is selectively expressed in dopaminergic cells (Euron proliferative progenitor cells).
- a person skilled in the art based on the nucleotide sequence of the 187A5 gene of SEQ ID NO: 1 or the amino acid sequence of the 187A5 protein of SEQ ID NO: 2, has the nucleotide sequence of the 187A5 gene or the amino acid sequence of the 187A5 protein present in various animals. Can be specified. For example, a homology search can be performed based on the human or mouse 187A5 gene or 187A5 protein, and the animal's 187A5 gene or 187A5 protein can be searched and identified. For homology search, BLAST etc. described later can be used.
- 187A5 gene and “187A5 protein” refers to 187A5 genes that are endogenous to various animals (preferably mammals) in addition to human-derived 187A5 genes. Used to include genes and 187A5 protein.
- Examples of the 187A5 gene include
- a polynucleotide encoding the human 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, or SEQ ID NO: 10; SEQ ID NO: 12, sequence A polynucleotide encoding the mouse 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 15, SEQ ID NO: 17, or SEQ ID NO: 19; a rat comprising the amino acid sequence represented by SEQ ID NO: 22 A polyclonal tide that encodes the 187A5 protein;
- a polynucleotide tide encoding the Usi 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 24;
- a polynucleotide encoding Inu 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 26;
- a polynucleotide encoding the chimpanzee 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 28
- SEQ ID NO: 1 SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, or SEQ ID NO: 9.
- a polynucleotide comprising the nucleotide sequence of the human 187A5 gene;
- a polynucleotide sequence comprising the nucleotide sequence of the mouse 187A5 gene represented by SEQ ID NO: 11, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 16, SEQ ID NO: 18, or SEQ ID NO: 20;
- a polynucleotide sequence comprising the nucleotide sequence of the rat 187A5 gene represented by SEQ ID NO: 21;
- a polynucleotide comprising the nucleotide sequence of the chimpanzee 187A5 gene represented by SEQ ID NO: 27
- the 187A5 gene includes a polynucleotide in which the following (i ′), (ii ′), (iii ′), and (iv ′) forces are also selected:
- SEQ ID NO: 16 A polynucleotide comprising the nucleotide sequence represented by SEQ ID NO: 18, SEQ ID NO: 20, SEQ ID NO: 21, SEQ ID NO: 23, SEQ ID NO: 25, or SEQ ID NO: 27;
- SEQ ID NO: 1 SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 16, SEQ ID NO: 18, SEQ ID NO: 20 SEQ ID NO: 21, SEQ ID NO: 23, SEQ ID NO: 25, or polynucleotide represented by SEQ ID NO: 27 and nucleotides under conditions that are stringent, and SEQ ID NO: 2.
- SEQ ID NO: 1 SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 16, SEQ ID NO: 18, SEQ ID NO: 20, SEQ ID NO: 21, SEQ ID NO: 23, SEQ ID NO: 25, or SEQ ID NO: 27 have 70% or more identity with the polynucleotide having the nucleotide sequence ability And a polynucleotide encoding a protein having a function equivalent to that of the protein having the amino acid sequence ability represented by SEQ ID NO: 2.
- the 187A5 gene also includes a polynucleotide encoding a protein from which the following (v ′), (vi ′), ( ⁇ ′), and (viii ′) forces are also selected:
- SEQ ID NO: 2 SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 15, SEQ ID NO: 17, SEQ ID NO: 19, A protein comprising the amino acid sequence represented by SEQ ID NO: 22, SEQ ID NO: 24, SEQ ID NO: 26, or SEQ ID NO: 28;
- SEQ ID NO: 2 SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 15, SEQ ID NO: 17, SEQ ID NO: 19, sequence SEQ ID NO: 2, encoded by a polynucleotide that encodes a polynucleotide encoding the amino acid sequence represented by SEQ ID NO: 22, SEQ ID NO: 24, SEQ ID NO: 26, or SEQ ID NO: 28 under stringent conditions, and SEQ ID NO: 2.
- a polynucleotide selected from the following '), (ii ,,) ⁇ (iii "), and (iv"):
- (i ′ ′) a polynucleotide comprising the nucleotide sequence represented by SEQ ID NO: 1; (ii ′ ′) insertion or substitution of one or more nucleotides in the nucleotide sequence represented by SEQ ID NO: 1
- An amino acid sequence encoded by a nucleotide sequence having one or more nucleotides attached to one or both ends thereof, and / or from the amino acid sequence represented by SEQ ID NO: 2 A polynucleotide encoding a protein having a function equivalent to that of the protein;
- SEQ ID NO: 1 is equivalent to a polynucleotide having the nucleotide sequence ability represented by SEQ ID NO: 1 and having a stringency under a stringent condition and having the amino acid sequence ability represented by SEQ ID NO: 2.
- SEQ ID NO: 1 has 70% or more identity with the polynucleotide having the nucleotide sequence ability represented by SEQ ID NO: 1, and has the same function as the protein having the amino acid sequence ability represented by SEQ ID NO: 2.
- a polynucleotide encoding a protein wherein the following (v ,,), (vi ,,), ( ⁇ ',), and (viii ,,) forces are also selected: Will be provided:
- SEQ ID NO: 2 encoded by a polynucleotide encoding the amino acid sequence represented by SEQ ID NO: 2 and polynucleotides that are subjected to hybridization under stringent conditions, and SEQ ID NO: 2 A protein having a function equivalent to that of the protein having the amino acid sequence ability represented;
- ( ⁇ '' ') Polynucleotide comprising the nucleotide sequence represented by SEQ ID NO: 1; ( ⁇ ', ') Insertion of one or more nucleotides in the nucleotide sequence represented by SEQ ID NO: 1 , A substitution, a deletion, and / or an amino acid sequence encoded by a nucleotide sequence with one or more nucleotides attached to one or both ends thereof, and represented by SEQ ID NO: 2 A polynucleotide encoding a protein having a function equivalent to that of a protein consisting of sequence;
- SEQ ID NO: 1 is equivalent to a protein consisting of an amino acid sequence represented by SEQ ID NO: 2 and is hybridized under a stringent condition with a polynucleotide having the nucleotide sequence ability represented by SEQ ID NO: 1.
- a human selected from the following ( ⁇ ',,), ( ⁇ ',,), ( ⁇ ',,), and (V iii' ")
- a polynucleotide encoding a protein of origin is provided:
- amino acid sequence represented by SEQ ID NO: 2 one or more amino acids are inserted, substituted, deleted, and / or one or more amino acids at one or both ends thereof.
- SEQ ID NO: 2 encoded by a polynucleotide encoding the amino acid sequence represented by SEQ ID NO: 2 and a polynucleotide that is allowed to hybridize under stringent conditions, and SEQ ID NO: 2
- SEQ ID NO: 2 consisting of an amino acid sequence having an identity of 95% or more with the amino acid sequence represented by SEQ ID NO: 2, and having the same function as a protein consisting of the amino acid sequence represented by SEQ ID NO: 2.
- a human-derived polynucleotide comprising the nucleotide sequence represented by SEQ ID NO: 1 is provided.
- a polynucleotide encoding a human-derived protein comprising the amino acid sequence represented by SEQ ID NO: 2 is provided.
- 187A5 protein examples include
- a human 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, or SEQ ID NO: 10;
- Mouse 187A5 protein comprising the amino acid sequence represented by SEQ ID NO: 12, SEQ ID NO: 15, SEQ ID NO: 17, or SEQ ID NO: 19;
- Rat 187A5 protein comprising the amino acid sequence of SEQ ID NO: 22;
- Usi 187A5 protein comprising the amino acid sequence of SEQ ID NO: 24;
- a chimpanzee 187A5 protein comprising the amino acid sequence of SEQ ID NO: 28; and a chimpanzee 187A5 protein comprising the amino acid sequence of SEQ ID NO: 28.
- 187A5 protein polypeptide
- polypeptide also include amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids
- a protein encoded by a nucleotide sequence comprising the nucleotide sequence of the human 187A5 gene represented by SEQ ID NO: 1, SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, or SEQ ID NO: 9;
- SEQ ID NO: 11 SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 16, SEQ ID NO: 18, or a nucleotide sequence comprising the nucleotide sequence of the mouse 187A5 gene represented by SEQ ID NO: 20 Protein
- SEQ ID NO: 23 Nucleotide sequence comprising nucleotide sequence of 187A5 gene The protein encoded in the sequence;
- SEQ ID NO: 27 Chimpanzee Protein encoded by nucleotide sequence comprising nucleotide sequence of 187A5 gene
- 187A5 protein includes proteins selected from the following (i,), (ii,), (iii,), and (iv,):
- SEQ ID NO: 1 SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 16, SEQ ID NO: 18, SEQ ID NO: 20, SEQ ID NO: 21, SEQ ID NO: 23, SEQ ID NO: 25, or NUCL represented by SEQ ID NO: 27
- SEQ ID NO: 2 SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 15, SEQ ID NO: 17, SEQ ID NO: 19, A protein comprising the amino acid sequence represented by SEQ ID NO: 22, SEQ ID NO: 24, SEQ ID NO: 26, or SEQ ID NO: 28;
- SEQ ID NO: 2 SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 15, SEQ ID NO: 17, SEQ ID NO: 19, sequence SEQ ID NO: 2, encoded by a polynucleotide that encodes a polynucleotide encoding the amino acid sequence represented by SEQ ID NO: 22, SEQ ID NO: 24, SEQ ID NO: 26, or SEQ ID NO: 28 under stringent conditions, and SEQ ID NO: 2.
- SEQ ID NO: 2 ( ⁇ ') SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 15, SEQ ID NO: 17, SEQ ID NO: 19, SEQ ID NO: 19 SEQ ID NO: 24, SEQ ID NO: 24, SEQ ID NO: 26, or amino acid sequence having 70% or more identity with the amino acid sequence represented by SEQ ID NO: 28, and the amino acid sequence represented by SEQ ID NO: 2 A protein that has the same function as a powerful protein.
- a protein selected from the following '), (ii ,,) ⁇ (iii "), and (iv"): (i '') a protein encoded by the nucleotide sequence represented by SEQ ID NO: 1;
- nucleotide sequence represented by SEQ ID NO: 1 one or more nucleotides are inserted, substituted, or deleted, and / or one or more nucleotides are added to one or both ends thereof.
- a protein comprising an amino acid sequence encoded by a truncated nucleotide sequence and having a function equivalent to that of a protein comprising the amino acid sequence represented by SEQ ID NO: 2;
- a protein is also selected in which the following (v,,), (vi,,), ( ⁇ ',), and (viii,,) forces are also selected: Provided: ( ⁇ ′ ′) a protein comprising the amino acid sequence represented by SEQ ID NO: 2;
- a human selected from the following ( ⁇ ',,), ( ⁇ ' ,,), ( ⁇ ',,), and (V iii' ") Proteins (polypeptides) derived from are provided:
- amino acid sequence represented by SEQ ID NO: 2 one or more amino acids are inserted, substituted, deleted, and / or one or more amino acids at one or both ends thereof.
- SEQ ID NO: 2 is encoded by the polynucleotide encoding the amino acid sequence represented by SEQ ID NO: 2 and the polynucleotide that is hybridized under stringent conditions, and also has the amino acid sequence capability represented by SEQ ID NO: 2.
- a protein having a function equivalent to that of a protein; and (viii '' ') consisting of an amino acid sequence having 95% or more identity with the amino acid sequence represented by SEQ ID NO: 2 and the amino acid represented by SEQ ID NO: 2 A protein having the same function as a protein consisting of a sequence.
- a human-derived protein encoded by the nucleotide sequence represented by SEQ ID NO: 1 is provided.
- a human-derived protein comprising the amino acid sequence represented by SEQ ID NO: 2 is provided.
- SEQ ID NO: 2 amino acid sequence represented by SEQ ID NO: 2
- "And amino acid insertions, substitutions or deletions, and additions to Z or one or both ends thereof in the amino acid sequence” are well-known methods such as site-specific mutagenesis. It means that the modification has been made by a technical method or by substitution of a plurality of nucleotides or amino acids to the extent that can occur naturally.
- polynucleotide it is meant to include single nucleotide polymorphisms (SNPs).
- SNPs single nucleotide polymorphisms
- the number of nucleotide and amino acid modifications is, for example, 1 to 30, preferably 1 to 20, more preferably 1 to: L0, further preferably 1 or several (for example, 9 or less), and particularly preferably 1 -4, most preferably 1-2 nucleotides and amino acids inserted, substituted, or deleted, and attached to Z or one or both ends thereof.
- the modified nucleotide sequence is preferably one or more (for example, one to several or 1, 2, 3, or 4) amino acid sequences represented by SEQ ID NO: 2.
- the nucleotide sequence represented by SEQ ID NO: 1 has a mutation that does not affect the function of the protein.
- the modified amino acid sequence is preferably a SEQ ID NO having one or more (eg, one! /, And several! /, 1, 2, 3, or 4) conservative substitutions. : The amino acid sequence represented by 2.
- the number of insertions, substitutions, deletions or additions introduced into the nucleotide sequence is preferably 1 Alternatively, it may be several (for example, 9 or less), more preferably 1 to 6, particularly preferably 1 to 4, and most preferably 1 to 2.
- the number of insertions, substitutions, deletions or additions introduced into the amino acid sequence is Preferably, it may be 1 or several (for example, 9 or less), more preferably 1 to 6, particularly preferably 1 to 4, and most preferably 1 to 2.
- substitution refers to one or more amino acid residues being replaced with another chemically similar amino acid residue so as not to substantially alter the function of the protein. Put in It means to change. For example, when a certain hydrophobic residue is substituted with another hydrophobic residue, a certain polar residue is substituted with another polar residue having the same charge.
- Functionally similar amino acids that can make such substitutions are known in the art for each amino acid. Specific examples include non-polar (hydrophobic) amino acids such as alanine, norine, isoleucine, leucine, proline, tryptophan, phenylalanine, and methionine.
- Examples of polar (neutral) amino acids include glycine, serine, threonine, tyrosine, glutamine, asparagine, and cysteine.
- Examples of positively charged (basic) amino acids include arginine, histidine, and lysine.
- Examples of negatively charged (acidic) amino acids include aspartic acid and glutamic acid.
- modified nucleotide sequence examples include, for example, substitution of the nucleotide sequence represented by SEQ ID NO: 1 to 512th guanine for adenine, substitution of 844th guanine to adenine, and 1360th guanine to adenine And nucleotide sequence having substitution, substitution of 2458th adenine to guanine, and substitution of 2991st adenine to guanine.
- the modified nucleotide sequence may have all these substitutions or a combination thereof.
- the modified amino acid sequence includes, for example, the substitution of the 161st arginine with histidine, the substitution of 272nd palin with isoleucine, and the 44th pallin with isoleucine in the amino acid sequence represented by SEQ ID NO: 2. Or an amino acid sequence having substitution of 810th arginine with glycine.
- the modified amino acid sequence may have all these substitutions or a combination thereof.
- hybridize under stringent conditions means to hybridize to a target polynucleotide under stringent conditions.
- homology search software such as FASTA, BLAST, Smith-Waterman [Meth. Enzym., 164, 765 (1988)] At least 70% or more, preferably 80% or more, more preferably 85% or more, even more preferably 90% or more, even more preferably 95% or more, particularly preferably 98% or more, and most preferably 99% or more.
- Polynucleo with at least% identity Chido is mentioned.
- “stringent conditions” means that the temperature is 40 ° C to 70 ° C, preferably 60 ° C to 65 ° C, etc. in a hybridization buffer that can be usually used by those skilled in the art.
- the reaction can be performed according to a method of washing in a washing solution having a salt concentration of 15 to 300 mmol ZL, preferably 15 to 60 mmol ZL.
- the temperature and salt concentration can be appropriately adjusted according to the length of the probe used.
- the conditions for washing the hybridized material can be 0.2 or 2 X SSC, 0.1% SDS, and a temperature of 20 ° C to 68 ° C.
- a difference can be made depending on the salt concentration or temperature at the time of washing. If there is a difference between the salt concentration and the hybridization, use 0.2 X SSC, 0.1% SDS as the stringent wash buffer (low stringency wash buffer), and 2 as the low stringency wash buffer. X SSC, 0.1% SDS. Also, when making the difference of hybrids in temperature, 68 ° C for stringent, 42 ° C for moderate stringency, and room temperature (20 ° C-25 ° C) for mild In case of deviation, 0.2 X SSC, 0.1% SDS can be used.
- the hybridization can be performed according to a known method.
- it can be performed according to the method described in the attached instruction manual.
- identity (sometimes referred to as homology) with respect to amino acid sequences is used to mean the degree of coincidence of amino acid residues constituting each sequence between sequences to be compared. It is done. At this time, the existence of gaps and the nature of amino acids are considered (Wil bur, Natl. Acad. Sci. U.S.A. 80: 726-730 (1983)).
- commercially available software such as BLAST (Altschul: J. Mol. Biol. 215: 403-410 (1990)), FASTA (Peasron: Methods in Enzymology 183: 63-69 (1990), etc. Can be used.
- identity may be any value calculated using a homology search program known to those skilled in the art.
- BRE Basic localism of the National Center for Biotechnology Information (NCBI) alignment search tool
- NCBI National Center for Biotechnology Information
- the nucleotide sequence having at least 70% or more identity with the nucleotide sequence represented by SEQ ID NO: 1 is preferably 80% or more, more preferably 90% or more, still more preferably 90% or more, More preferred is a nucleotide sequence having an identity of 95% or more, particularly preferably 98% or more, and most preferably 99% or more.
- the amino acid sequence having at least 70% or more identity with the amino acid sequence represented by SEQ ID NO: 2 is preferably 80% or more, more preferably 90% or more, and still more preferably 90% or more. Even more preferably, it may be an amino acid sequence having an identity of 95% or more, particularly preferably 98% or more, and most preferably 99% or more.
- the polynucleotide encoding the protein having the amino acid sequence ability represented by SEQ ID NO: 2 is a cDNA sequence encoding the same amino acid in addition to a part or all of the cDNA sequence represented by SEQ ID NO: 1. It also means a sequence having a degenerate codon as a cDNA sequence. Furthermore, it shall mean a genomic DNA sequence including introns and untranslated regions. In the present invention, RNA sequences corresponding to these are also included.
- a biological phenomenon or function related to the expression of the 187A5 gene can be determined, for example, by evaluating whether or not the force selectively expressed in the dopamine producing-euron progenitor cells, and preferably in the dopamine producing-euron proliferating progenitor cells, in the midbrain.
- amino acid residues preferably, at least 6 amino acid residues of the amino acid sequence of 248th to 397th or 792th to 877th of the amino acid sequence represented by SEQ ID NO: 2
- a protein comprising a polypeptide comprising a group) or all of them. Since this protein corresponds to a highly discriminating part of the amino acid sequence of the 187A protein, it can be used as an antibody antigen that can identify the 187A5 protein with higher accuracy. It is possible to be.
- the 187A5 protein is a type I transmembrane protein, and is expressed on the cell surface with the N-terminal side oriented extracellularly. Therefore, viable cells expressing the protein can be separated by flow cytometry using an antibody having a binding property to the protein.
- amino acid sequence represented by SEQ ID NO: 2 is represented by the 28th to 927th amino acid sequence, the amino acid sequence represented by SEQ ID NO: 4, the 16th to 1267th amino acid sequence, represented by SEQ ID NO: 6.
- a protein comprising a polypeptide having at least 5 amino acid residues (preferably at least 6 amino acid residues) in the 1st to 866th amino acid sequence of the amino acid sequence represented by 28, or a polypeptide
- a protein according to the present invention as an indicator for detecting or selecting dopaminergic neuron progenitor cells, preferably dopaminergic neuron proliferative progenitor cells.
- the probes and primers according to the invention used for the detection or selection of dopamine producing-euron progenitor cells can specifically hybridize with the 18 7A5 gene.
- dopamine producing-euron progenitor cells preferably dopamine producing-euron proliferating cells
- 187A5 mRNA is the mid ventral ventral region of the midbrain where Lrp4 positive dopaminergic-euron progenitor cells are present
- VZ ventricular zone
- 187A5 mRNA is dopamine production-euron proliferation It was revealed that it is selectively expressed in progenitor cells.
- the expression of the 187A5 gene is useful as an indicator of dopaminergic-euron progenitor cells. Therefore, the probe, primer, and primer set according to the present invention can be used as a marker for detecting dopaminergic-euron progenitor cells, preferably dopaminergic-euron proliferating progenitor cells.
- the probe and primer according to the present invention refer to a polymer comprising a plurality of bases or base pairs such as deoxyribonucleic acid (DNA) or ribonucleic acid (RNA), as long as the expression of the 187A5 gene can be detected.
- Double stranded cDNA is also known to be available in tissue in situ hybridization, and probes and primers of the invention include such double stranded cDNA.
- An especially preferred probe and primer for detecting RNA in tissues is an RNA probe (riboprobe).
- the probes and primers according to the present invention include those containing a nucleotide sequence consisting of at least 10, preferably at least 15 nucleotides of the nucleotide sequence of the 187A5 gene or its complementary sequence.
- the probes and primers according to the present invention are also preferably 10-50 or 10-30, more preferably 15-50 or 15-30, even more preferably 20-50. Even or 20 or 30 or even more, more preferably 25 to 50 or 25 to 30, most preferably 26 to 39 or 26 to 35 nucleotides that contain a nucleotide sequence. It is done.
- the probes and primers according to the present invention can be at least 10 bases in length, preferably at least 15 bases in length, more preferably at least 20 bases in length, and even more preferably at least 25 bases in length.
- the probes and primers according to the present invention are also preferably 10 to 50 bases or 10 to 30 bases long, more preferably 15 to 50 bases or 15 to 30 bases long, still more preferably 20 to 30 bases long. It is 50 bases or 20-30 bases long, more preferably 25-50 bases long or 25-30 bases long, most preferably 26-39 bases long or 26-35 bases long.
- the probe and primer comprises a nucleotide sequence consisting of at least 10 (more preferably at least 15) consecutive nucleotides of the nucleotide sequence of the 187A5 gene or its complementary sequence. 15-50 bases in length or 15-30 bases in length, used for detection or selection of donomin-producing neuron progenitor cells in the midbrain, preferably dopaminergic-euron proliferative progenitor cells, that can hybridize to the 187A5 gene More preferably, a polynucleotide of 25 to 50 bases or 25 to 30 bases in length, most preferably 26 to 39 bases or 26 to 35 bases in length is provided.
- a polynucleotide which can be hybridized to a part of the nucleotide sequence of the 187A5 gene with high discrimination.
- a polynucleotide for example, a nucleotide comprising part or all of the nucleotide sequence of the nucleotide sequence 774 to 1221 or 2403 to 2666 of the nucleotide sequence represented by SEQ ID NO: 1.
- Examples include polynucleotides that hybridize to sequences.
- a highly discriminating portion can be amplified by a nucleic acid amplification method, or a highly discriminating portion can be hybridized.
- a polynucleotide that can be provided is provided. By using such a polynucleotide, it becomes possible to detect progenitor cells, preferably proliferating cells with higher accuracy.
- a polynucleotide for example, a nucleotide sequence comprising a part or all of the nucleotide sequence of the 774th to 1221st or the 2403th to 2666th nucleotides of the nucleotide sequence represented by SEQ ID NO: 1 is used as the nucleic acid.
- examples thereof include polynucleotides that can be amplified by an amplification method.
- the probe according to the present invention can be used as a probe according to a conventional method in a known method for detecting a target gene such as Northern blotting, Southern blotting, or in situ hybridization.
- Probes according to the present invention can be chemically synthesized based on the nucleotide sequences disclosed herein. Probe preparation is well known, for example, Molecular Cloning, A Laboratory. Manual 2 nd ed. "(Cold Spring Harbor Press (1989) ), it can be carried out according to the" Current Protocols in Molecular BiologyJOohn Wiley & Sons (1987- 1997)).
- the primer according to the present invention can be used as a primer set composed of two or more kinds of the primers.
- the primer and primer set according to the present invention are known methods for detecting a target gene using nucleic acid amplification methods such as PCR, RT-PCR, real-time PCR, and in situ PCR. It can be used as a primer and primer set.
- the primer set according to the present invention can be selected so that the nucleotide sequence of the 187A5 gene can be amplified by a nucleic acid amplification method such as a PCR method.
- Nucleic acid amplification methods are well known, and selection of primer sets in nucleic acid amplification methods is obvious to those skilled in the art.
- the PCR method one of two primers (primer pair) pairs with the positive strand of the double-stranded DNA of the 187A5 gene, the other primer pairs with the negative strand of the double-stranded DNA, and one The primer can be selected so that the other primer pairs with the extended strand extended by one primer.
- 3 regions for the target gene and 3 terminal forces are F3c, F2c, and Flc, and 5 regions from the terminal side are Bl, B2, and B3. Each of these four regions can be used to design four types of primers.
- the primer according to the present invention can be chemically synthesized based on the nucleotide sequence disclosed herein. Primer preparation is well known and is performed, for example, according to ⁇ Molecular Cloning, A Labora tory Manual 2 '' ed. (Cold Spring Harbor Press (1989)), Current Protocols in Molecular Biology Joohn Wiley & Sons (1987-1997). it can.
- the antibody according to the present invention can specifically recognize the 187A5 protein. According to Example 5, it was confirmed that 187A5 protein was present in donomin producing-euron progenitor cells. Thus, the presence of 187A5 protein is useful as an indicator of dopamine production-euron progenitor cells including donomin production-euron proliferative progenitor cells.
- the antibody according to the invention comprises a dopaminergic-euron progenitor cell, preferably a dopaminergic product. It can be used as a marker for detecting live-euron progenitor cells.
- the antibody according to the present invention detects donomin-producing euron progenitor cells as living cells or This is advantageous in that it can be selected (Example 6).
- the antibody according to the present invention is advantageous in that it can also detect or select ES cell-derived cells (Example 7).
- Examples of the 187A5 protein for obtaining the antibody according to the present invention include the above-described proteins as long as they have the antigenicity of 187A5. Also included are proteins having an amino acid sequence in which one or more amino acid residues are deleted, inserted, substituted or added in the amino acid sequence of the 187A5 protein. It is known that such proteins maintain the same biological activity as the original protein (Mark et al. (1984) Proc. Natl. Acad. Sci. U SA 81: 5662-6; Zoller and Smith (1982) Nucleic Acids Res. 10: 6487—500; Wang et al. (L 984) Science 224: 1431—3; Dalbadie—McFarland et al.
- the antibody according to the present invention includes an antibody specific to a part of the 187A5 protein. That is, the 187A5 protein for obtaining the antibody of the present invention includes at least 6 amino acid residues of the 187A5 protein in addition to the polypeptide having the full-length amino acid sequence of the 187A5 protein (for example, 8, 10, 12 or 15 A polypeptide fragment having the same sequence as amino acid residues or more).
- the polypeptide fragment of 187A5 protein in this specification may be any fragment as long as it has 187A5 protein or antigenicity thereof.
- Preferable fragments include polypeptide fragments such as the amino terminal of 187A5 protein.
- the antigenic determinant of the polypeptide is a method of analyzing hydrophobic Z hydrophilicity on the amino acid sequence of the protein (Kyte-Doolittle (1982) J. Mol. Biol. 157: 105-22), a method of analyzing the secondary structure (Chou-Fasman (1978) Ann. Rev. Biochem. 47: 251-76), and computer programs (Anal.Biochem. 151: 540-6 (1985)) or short peptides were synthesized and their antigens. It can be confirmed by a method such as PEPSCAN method (Japanese Patent Publication No. 60-500684).
- antibodies having binding to 187A5 protein include
- SEQ ID NO: 2 SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, or an antibody having a binding property to the amino acid sequence represented by SEQ ID NO: 10 or a protein that is a part thereof;
- SEQ ID NO: 12 An antibody having a binding property to the amino acid sequence represented by SEQ ID NO: 15, SEQ ID NO: 17, or SEQ ID NO: 19, or a protein that is a part thereof;
- Antibody having binding property to amino acid sequence represented by SEQ ID NO: 28 or a protein having a partial force thereof
- an antibody that recognizes a highly distinct polypeptide portion in the 187A5 protein.
- an antibody that recognizes a highly distinct polypeptide portion in the 187A5 protein.
- progenitor cells preferably proliferating cells with higher accuracy.
- examples of such an antibody include at least 5 amino acid residues (preferably at least 6 amino acid residues) of the amino acid sequence of 248 to 397 or 792 to 877 of the amino acid sequence represented by SEQ ID NO: 2, or Examples thereof include antibodies having binding ability to a protein comprising a polypeptide that is also potent.
- an antibody that is expressed extracellularly of the 187A5 protein and recognizes the polypeptide moiety.
- an antibody By using such an antibody, it becomes possible to detect progenitor cells, preferably the proliferating cells alive.
- examples of such antibodies include antibodies having binding properties to the polypeptide portion of the 187A5 protein expressed outside the cell.
- Antibodies according to the present invention can be obtained using methods well known to those skilled in the art (for example, “Current Protocols in Molecular Biology” (John Wiley & Sons (1987)), Antibodies: A Lauratory Manual, Ed. Harlow and David Lane, Cold Spring Harbor Laboratory (1988)).
- the antibodies according to the present invention include polyclonal antibodies, monoclonal antibodies, chimeric antibodies, single chain antibodies (scFv), humanized antibodies, multispecific antibodies, and Fab, Fab ', F (ab'), Fc ,
- Antibody fragments fragments such as Fv are included.
- the blood of a mammal sensitized with an antigen can be taken out, and the blood serum can be separated by a known method to obtain a serum containing a polyclonal antibody.
- the fraction containing the serum polyclonal antibody can be further isolated.
- a monoclonal antibody antibody-producing cells obtained from the spleen or lymph nodes of a mammal sensitized with the above antigen are taken out and fused with myeloma cells, etc., and the resulting hyperidoma (fusion cell) The antibody can also be recovered to obtain a monoclonal antibody.
- an immunizing antigen a fragment of the 187A5 protein can be used. Or what was synthesize
- the antigen may be used as a complex with a carrier protein.
- various condensing agents can be used. Daltaraldehyde, carbodiimide, maleimide active ester, and the like can be used.
- Carrier protein is bovine serum albumin, thyroglobulin
- mice examples include mice, rats, hamsters, guinea pigs, rabbits, cats, dogs, pigs, goats, horses, or rabbits, preferably mice, rats, rabbits, guinea pigs, hamsters, and the like.
- inoculation method include subcutaneous, intramuscular or intraperitoneal administration. When administered, it can be mixed with complete Freund's adjuvant or incomplete Freund's adjuvant, usually once every 2 to 5 weeks.
- the antibody-producing cells obtained are fused with myeloma cells and isolated as a hyperidoma.
- myeloma cells those derived from mice, rats, humans and the like are used, and those derived from the same species as antibody-producing cells are preferred.
- hyperidoma cell fusion
- fusion promoters include polyethylene glycol and Sendai virus.
- 20 to 50% polyethylene glycol (average molecular weight 1000 to 4000) is used20.
- the ratio of the number of antibody-producing cells to the number of myeloma cells is usually about 1: 1 to 10: 1, and cell fusion can be carried out by reacting for about 1 to 10 minutes.
- ELISA using a microplate coated with 187A5 protein
- anti-immunity Examples include EIA using a microplate coated with a globulin antibody, and immunoblotting using a nitrocellulose transfer membrane after electrophoresis of a sample containing 187A5 protein.
- Hypridoma can be obtained from such wells by, for example, limiting dilution. Selection and breeding of Hypridoma is usually performed in a medium for animal cells (eg, RPMI1640) containing 10-20% fetal calf serum with the addition of HAT (hypoxanthine, aminopterin, thymidine).
- HAT hypoxanthine, aminopterin, thymidine
- the clones thus obtained can be transplanted into the abdominal cavity of SCID mice pre-administered with pristane, and ascites containing a high concentration of monoclonal antibody can be collected 10-14 days later and used as a raw material for antibody purification.
- the clone can be cultured, and the culture can be used as a raw material for antibody purification.
- the expression of the 187A5 gene is an indicator of the presence of a donomin-producing neuron progenitor cell, preferably a donomin-producing-euron proliferative progenitor cell. Therefore, according to the present invention, by detecting the expression of the 187A5 gene, it is possible to detect or select dominin-producing euron precursor cells, preferably dopamine-producing euron proliferative progenitor cells.
- the method for "detecting the expression of the 187A5 gene” is not particularly limited as long as it is a method capable of detecting the expression of the 187A5 gene in the test cell sample.
- the method can be performed by the following steps. :
- test cell sample is preferably a cell sample that is considered to contain dopamine producing-euron progenitor cells, preferably donomin producing-euron proliferating progenitor cells.
- dopamine producing-euron progenitor cells preferably donomin producing-euron proliferating progenitor cells.
- Cells in the ventral region can be used. Cells in the ventral region of the midbrain can be obtained by known methods (Studer, L., et al.
- fetus preferably human aborted fetus
- Cells in the ventral region of the patient's own mesencephalon can be used as the test cell sample.
- cultured cells containing dopamine producing-euron progenitor cells preferably donomin producing-euron proliferating progenitor cells induced in vitro, can be used.
- In vitro induction of dominomin-producing neuronal progenitor cells or donomin-producing-euron proliferative progenitor cells is induced by known ES cells (Kawasaki et al. Neuron (2000) 28 (l): 31—40, Lee, SH., Et al.
- the "SDIA method” can be performed by co-culturing ES cells with stromal cell line PA6 in a serum-free medium (Kawasaki et. Al. Neuron. 2000 28 (1): 31- 40).
- ES cells are cultured in a non-adherent culture dish in the presence of serum to form an embryoid body (EB), followed by EB on the adherent culture dish.
- EB embryoid body
- growth factors such as Shh, FGF2, and FGF8 can be added to induce donomin-producing euron progenitor cells (Lee, SH., Et al. Nature Biotech (2000) 18: 675-579 ).
- the detection polynucleotide is hybridized with a nucleic acid sample (mRNA or a transcription product thereof) using the probe according to the present invention, and a hybridization complex is prepared.
- the expression of the 187A5 gene in the cell sample can be detected by detecting the body, ie, the nucleotide duplex.
- the detection of the expression of the 187A5 gene using the hybridization method can be carried out, for example, by the following steps:
- step (a-l) mRNA prepared from a cell sample considered to contain donomin producing-euron progenitor cells, preferably dopamine producing-euron proliferating progenitors or its mRNA force
- the target DNA (cDNA) can be contacted with the probe as a polynucleotide from the test cell sample.
- the probe can be labeled and used.
- Labels include, for example, radioactivity (eg, 32 P, “C, and 35 S), fluorescence (eg, FIT
- the detection of the hybridization product can be carried out using a known method such as Northern hybridization, Southern hybridization, or colony hybridization.
- the cell in which the hybridization complex is detected is a cell expressing the 187A5 gene
- the cell is designated as a dopaminergic neuron progenitor cell, preferably dopaminergic-euron proliferation It can be determined as a progenitor cell.
- a nucleic acid sample (mRNA or a transcription product thereof) is amplified by a nucleic acid amplification method using the primer or primer set according to the present invention, and the amplified product is amplified.
- the expression of the 187A5 gene in the cell sample can be detected.
- Detection of the expression of the 187A5 gene using a nucleic acid amplification method can be performed, for example, by the following steps:
- (a-2) a step of performing nucleic acid amplification using a primer or primer set according to the present invention using a polynucleotide derived from a test cell sample as a saddle type;
- (b-2) A step of detecting the formed amplification product.
- step (a-2) mRNA prepared from a test sample that is considered to contain donomin producing-euron progenitor cells, preferably dopamine producing-euron proliferating progenitor cells, or its complementary mRNA transcribed DNA (cDNA) can be used as a saddle
- Amplification products can be detected using nucleic acid amplification methods such as PCR, RT-PCR, real-time PCR, and LAMP.
- the cell in which the amplification product is detected is a cell expressing the 187A5 gene
- the cell can be determined as a donomin-producing neuron progenitor cell, preferably a dopamine-producing neuron proliferative progenitor cell.
- the 187A5 protein serves as an indicator of the presence of a donomin-producing euron progenitor cell, preferably a donomin-producing euron progenitor cell. Therefore, according to the present invention, by detecting the 187A5 protein, donomin producing-euron progenitor cells
- dopaminergic-euron proliferative progenitor cells can be detected or selected.
- the method for “detecting 187A5 protein” is not particularly limited as long as it can detect 187A5 protein in a test cell sample, and examples thereof include an antigen-antibody reaction method.
- the 187A5 protein in the cell sample can be detected by bringing the antibody according to the present invention into contact with the cell sample and detecting the antigen-antibody reaction.
- Detection of 187A5 protein using an antigen-antibody reaction can be carried out, for example, by the following steps:
- an antigen-antibody reaction method may be mentioned.
- the “test cell sample” may be a test cell sample that is considered to contain dopamine producing-euron progenitor cells, preferably donomin producing-euron proliferating progenitor cells.
- the test cell sample for example, one derived from fetal midbrain can be used. The method for obtaining the test cell sample is as described above.
- Detection of 187A5 protein using an antigen-antibody reaction method can be performed, for example, by the following steps:
- test cell sample considered to contain dopamine producing-euron progenitor cells, preferably dopamine producing-euron proliferating progenitor cells, by immunological methods.
- 187A5 protein can be detected.
- Immunological methods include cell tissue samples that have been treated appropriately as needed, such as cell separation and extraction procedures, immunohistochemical staining, enzyme immunoassay, Westamplot method, and aggregation methods.
- a known method such as a competitive method or a sandwich method can be applied.
- the immunohistochemical staining method can be performed, for example, by a direct method using a labeled antibody or an indirect method using a labeled antibody having a binding property to the antibody.
- a labeling agent a known labeling substance such as a fluorescent substance, a radioactive substance, an enzyme, a metal, or a dye can be used.
- the protein derived from the test cell sample is preferably a polypeptide comprising an extracellular region (ie, the N-terminal region)! /.
- the cell in which the antibody-antigen complex is detected is a cell expressing the 187A5 protein. Therefore, the cell can be determined as a donomin-producing neuron progenitor cell, preferably a dopamine-producing neuron proliferative progenitor cell.
- dopamine-producing euron progenitor cells preferably donomin-producing euron progenitor cells, have high purity.
- dopaminergic production-euron progenitor cells preferably dominin production-euron proliferative progenitor cells
- a donomin production other than the 187A5 gene-euron proliferative progenitor cell marker gene or a protein thereof a post-mitotic donomin production-euron progenitor cell marker gene or a protein thereof
- a post-mitotic donomin production-euron progenitor cell marker gene or a protein thereof Other than the 187A5 gene, dopamine production-euron progenitor cell marker gene or protein thereof, or mature donomin production-euron cell marker gene or protein thereof.
- Figure 1 shows the dopamine production-euron-related marker genes that are selectively expressed at each stage.
- a combination of a dopamine production other than the 187A5 gene and the euron proliferative progenitor cell marker gene or a protein thereof is used in combination, and not only the 187A5 gene but also the 187A5 gene Other dopamine production
- a neuron proliferative progenitor cell marker gene or its protein it is possible to detect or select a donomin producing-euron progenitor cell, preferably a donomin producing-euron progenitor cell with high accuracy.
- step (a) as a test cell sample, a cell in which the expression of a dominamine production other than the 187A5 gene-expressed euron proliferative progenitor cell marker gene or its protein is detected is used. Accordingly, it is possible to detect or select a donomin producing-euron progenitor cell, preferably a donomin producing-euron progenitor cell with high accuracy.
- the cells in which the reactivity was detected in the step (b) (for example, the cells in which the hybridization complex or the amplification product was detected) expressed the 187A5 gene and produced dominine other than the 187A5 gene.
- the ability to express the euron proliferative progenitor cell marker gene, or the cell in which the protein is present, so that the cell is detected or selected to proliferate the dopamine-producing euron progenitor cell, preferably a donomin-producing neuron A progenitor cell can be determined with high accuracy.
- step (b) for cells in which reactivity was detected (for example, cells in which a hybridization complex or an amplification product was detected), (e-1) 187A5 gene Dopamine production-Europnic progenitor cell, preferably dopamine production with high accuracy by carrying out a method further comprising the step of detecting the expression of the euron proliferative progenitor cell marker gene or its protein. -Euron proliferating progenitor cells can be detected or selected.
- step (e-1) the cells in which the expression of dopamine other than 187A5 gene-expressing euron proliferative progenitor cell marker gene or its protein is detected expresses 187A5 gene and other than 187A5 gene.
- Dopamine production--European proliferative progenitor cell marker gene is expressed and expressed, or the protein thereof is present, so that the detected or selected dopamine production-euron progenitor cell, preferably dopamine production -It can be determined as Euron proliferative progenitor cells with high accuracy.
- dopamine production after mitotic arrest-Euron progenitor cell marker gene or its protein is used in combination, and 187A5 gene is expressed but dopamine after mitotic arrest.
- Producing neuron precursor By confirming that the expression of the vesicle marker gene or its protein is not detected, dopaminergic production-euron progenitor cells, preferably dopaminergic production-euron proliferative progenitor cells, can be detected or selected with high accuracy.
- a dopaminergic neuron progenitor is obtained by using, as a test cell sample, a cell in which expression of dopaminergic neuron progenitor cell marker gene after mitotic arrest or its protein has not been detected.
- Cells preferably dopaminergic-euron proliferative progenitor cells can be detected or selected with high accuracy.
- cells in which the reactivity was detected in step (b) express the 187A5 gene, but dopamine production after mitotic arrest- Since the cell does not express the euron progenitor cell marker gene and its protein does not exist, it is detected or selected as a dopamine producing-euron progenitor cell, preferably a donomin producing-euron proliferating progenitor cell. It can be judged with high accuracy.
- step (b) for cells in which reactivity was detected (for example, cells in which a hybridization complex or an amplification product was detected), (e-2) mitosis Dopaminergic production-Euron progenitor cells, preferably dopaminergic production-Euron proliferation by carrying out a method further comprising the step of detecting post-dopamine production-euron progenitor cell marker gene expression or protein thereof.
- Progenitor cells can be detected or selected.
- step (e-2) the cells that do not detect the expression of dopaminergic production-neuron progenitor cell marker gene or its protein after mitotic arrest are
- a dornomin production-euron progenitor cell marker gene other than the 187A5 gene or its protein is used in combination, and not only the 187A5 gene, Donomin production other than 187A5 gene-by detecting expression of euron progenitor cell marker gene or its protein
- dopaminergic-Lon progenitor cells preferably dopaminergic-Lon progenitor cells can be detected or selected with high accuracy.
- step (a) dopamine is produced by using, as a test cell sample, a cell in which the production of a dominamine other than the 187A5 gene-expressed euron progenitor cell marker gene or its protein is detected.
- Producing neuron progenitor cells, preferably domin-producing proliferating progenitor cells can be detected or selected with high accuracy.
- the cells in which the reactivity was detected in step (b) (for example, the cells in which the hybridization complex or amplification product was detected) expressed the 187A5 gene and other than the 187A5 gene.
- the dopamine-producing neuron progenitor cell preferably a dopamine-producing neuron progenitor cell, preferably a dopamine-producing neuron that has been detected or selected
- a proliferative progenitor cell can be determined with high accuracy.
- step (b) for cells in which reactivity was detected (for example, cells in which a hybridization complex or an amplification product was detected), (e-3) 187A5 gene Dopamine production-Lon progenitor cell marker gene, or by detecting the expression of the Lon progenitor cell marker gene, or by detecting the protein thereof. Proliferating progenitor cells can be detected or selected.
- step (e-3) cells in which expression of dopamine other than 187A5 gene-Lon precursor cell marker gene or its protein is detected express 187A5 gene and dopamine production other than 187A5 gene -A Lon progenitor cell marker gene that expresses, or is a cell in which the protein is present, so that the cell is detected or selected-a Lon progenitor cell, preferably a dopaminergic neuron proliferative progenitor cell Can be determined with high accuracy.
- the detection method characterized by detecting the expression of 187A5 gene the ability to express 187A5 gene in combination with mature dormin production-Lon cell marker gene or its protein is also used. Confirm that the expression of the cell marker gene or its protein is not detected.
- Oneron progenitor cells preferably dopaminergic-euron proliferative progenitor cells can be detected or selected with high accuracy.
- step (a) by using, as a test cell sample, a cell in which mature dopamine production-euron cell marker gene expression or its protein was not detected, dopamine production-euron. It is possible to detect or select a progenitor cell, preferably a donomin-producing uron proliferating progenitor cell with high accuracy.
- the cells in which the reactivity is detected express the 187A5 gene but produce mature dopamine.
- the donomin producing-euron progenitor cell preferably the dopamine producing-euron proliferating progenitor cell. Can be determined with high accuracy.
- step (e-4) mature dopamine for the cells in which the reactivity was detected (for example, the cells in which the hybridization complex or the amplification product was detected).
- Production of a neuron cell marker gene expression or a protein thereof is further detected to detect or select a donamine-producing euron progenitor cell, preferably a dopamine-producing neuron proliferative progenitor cell, with high accuracy. can do.
- the expression of mature donomin production-euron cell marker gene is expressed in cells where no expression of mature donomin production-euron cell marker gene or its protein is detected. Therefore, the cell is determined with high accuracy as a detected or selected dopamine producing-euron progenitor cell, preferably a donomin producing-euron proliferating progenitor cell. can do.
- dopamine production other than 187A5 gene-Euron proliferative progenitor cell marker gene or its protein is used in combination, and not only 187A5 protein but also 187A5 gene Donomin production by detecting the expression of a neuron proliferative progenitor marker gene or its protein, thereby producing donomin production-euron progenitor cells, preferably donomin production-euro Proliferating progenitor cells can be detected or selected with high accuracy.
- step (c) by using, as a test cell sample, a cell in which the expression of a dominine production other than the 187A5 gene-euron proliferation progenitor cell marker gene or its protein is detected, It is possible to detect or select a donomin producing-euron progenitor cell, preferably a donomin producing-euron progenitor cell with high accuracy.
- the cells in which the reactivity was detected in the step (d) (for example, the cells in which the antigen-antibody complex was detected) existed in the presence of 187A5 protein and dopaminergic progenitor cells other than the 187A5 gene.
- the cell is detected or selected as a dopamine producing-euron progenitor cell, preferably a dopamine producing-euron proliferating progenitor cell.
- the accuracy can be determined.
- step (d) for cells in which the reactivity was detected (for example, cells in which the antigen-antibody complex was detected), (e-l) production of donomin other than the 187A5 gene-euron
- a method further comprising the step of detecting the expression of a proliferative progenitor cell marker gene or its protein highly accurate detection of dopamine-producing euron progenitor cells, preferably dopamine-producing neuron proliferative progenitor cells, is achieved. Or you can choose.
- the expression of dominine other than the 187A5 gene-euron proliferation progenitor cell marker gene or the cell in which the protein is detected contains 1 87A5 protein and other than the 187A5 gene.
- Donomin production-Euron proliferative progenitor cell marker gene is expressed and expressed, or the protein is present, so that the cell is detected or selected Dominine production-Euron progenitor cell, preferably Dopamine production-Euron proliferative progenitor cells can be determined with high accuracy.
- dorminamine production-euron progenitor cell marker gene or its protein is used in combination, and 187A5 protein is expressed, but mitotic arrest after dopamine production -Euron progenitor cells
- Dopamine production-Euron progenitor cells preferably dopamine production-before Euron growth, by confirming that marker gene expression or its protein is not detected It is possible to detect or select the tumor cells with high accuracy.
- a dopaminergic neuron progenitor is obtained by using, as a test cell sample, a cell in which expression of dopaminergic neuron progenitor cell marker gene after mitotic arrest or its protein has not been detected.
- Cells preferably dopaminergic-euron proliferative progenitor cells can be detected or selected with high accuracy.
- cells in which the reactivity was detected in step (d) were detected as dopaminergic-neuron progenitor cell markers after mitotic arrest in which 187A5 protein is present. Since the gene is not expressed and the protein is not present, the cell is determined with high accuracy as the detected or selected donomin producing-euron progenitor cell, preferably dopamine producing-euron proliferating progenitor cell. can do
- step (d) for cells in which reactivity was detected (for example, cells in which an antigen-antibody complex was detected), (e-2) dopamine production after mitosis-euron precursor
- step (e-2) dopamine production after mitosis-euron precursor
- step (e-2) dopamine production after mitotic arrest-expression of the euron progenitor cell marker gene or its protein is not detected, the cell is in the presence of 187A5 protein, dopamine production after mitotic arrest- Since the euron progenitor cell marker gene is not expressed and the protein does not exist, the dopamine production-euron progenitor cell, preferably donomin production-euron proliferative progenitor cell detected or selected, is selected. And can be determined with high accuracy.
- a dopaminergic neuron progenitor cell marker gene other than 187A5 gene or its protein is used in combination, and not only 187A5 protein but also other than 187A5 gene
- detecting the expression of the donomin-producing euron progenitor marker gene or its protein it is possible to detect or select dopamine-producing euron progenitor cells, preferably dopamine-producing euron progenitor progenitors with high accuracy. it can.
- a dopaminergic neuron can be obtained by using, as a test cell sample, a cell in which a dominamine production-euron progenitor cell marker gene other than the 187A5 gene or its protein is detected.
- Progenitor cells preferably dopamine producing-euron proliferating progenitor cells can be detected or selected with high accuracy.
- the cells in which the reactivity was detected in step (d) (for example, the cells in which the antigen-antibody complex was detected) contained 187A5 protein and produced donomin other than the 187A5 gene-euron progenitor cells.
- the marker gene is expressed or is a cell in which the protein is present, the cell is detected with high accuracy with the detected or selected dopamine producing-euron progenitor cell, preferably a dopamine producing neuron proliferating progenitor cell. Can be judged.
- step (d) for cells in which reactivity was detected (for example, cells in which an antigen-antibody complex was detected), (e-3) production of donomin other than the 187A5 gene-euron
- step (e) for cells in which reactivity was detected (for example, cells in which an antigen-antibody complex was detected), (e-3) production of donomin other than the 187A5 gene-euron
- dopaminergic production-euron progenitor cells preferably doromin production-euron proliferative progenitor cells are detected with high accuracy. Or you can choose.
- step (e-3) the cells in which the expression of the dornomin production other than 187A5 gene-euron progenitor cell marker gene or its protein is detected and the 187A5 protein is present and the dono other than 187A5 gene are present.
- the detection method characterized by detecting 187A5 protein the mature dopamine production-Euron cell marker gene or a protein thereof is used in combination, and 187A5 protein is expressed. Mature dopamine production-Euron cell marker gene By confirming that the expression or its protein is not detected, it is possible to detect or select dopaminergic-neuron progenitor cells, preferably dopaminergic progenitor-euron proliferative progenitor cells, with high accuracy.
- step (c) as a test cell sample, mature dopamine production-euro
- dopamine-producing euron progenitor cells preferably dormin-producing europlon progenitor cells with high accuracy, by using cells that do not detect the expression of the human cell marker gene or its protein be able to.
- step (d) the cells in which the reactivity was detected (for example, cells in which the antigen-antibody complex was detected).
- 187A5 protein is a force that does not express mature dopaminergic neuron cell marker gene, nor is the protein present, so the cell is detected or selected dopaminergic neuron progenitor cell, preferably Dopaminergic neuron proliferative progenitor cells can be determined with high accuracy.
- step (d) for cells in which the reactivity was detected (for example, cells in which the antigen-antibody complex was detected), (e-4) mature dopamine production-euron cell marker gene
- the method further comprising the step of detecting the expression of the child or its protein, it is possible to detect or select the dopamine producing-euron progenitor cells, preferably the dopamine producing-euron proliferating progenitor cells with high accuracy. it can.
- step (e-4) cells in which mature dorminamine production-euron cell marker gene expression or its protein is not detected are present in the presence of 187A5 protein mature dopamine production-euron cells Since the marker gene is not expressed and the protein is not present, the cell is treated with the detected or selected donomin producing-euron progenitor cell, preferably dopamine producing-euron proliferating progenitor cell. Can be determined.
- Donomin production other than 187A5 gene-Euron proliferative progenitor cell marker gene or protein thereof means "Donomin production other than 187A5 gene-Euron proliferative progenitor cell marker gene” or donomin production other than ⁇ 187 ⁇ 5 protein- "Euron proliferative progenitor cell marker protein”.
- Dominine production other than 187A5 gene-Euron proliferative progenitor cell marker gene refers to production of dominomin other than the 187A5 gene expressed in the ventral ventricular region (VZ region) of the midbrain- Examples include the euron proliferative progenitor cell marker gene, such as the Lrp4 gene, the Nato3 gene, the Msxl gene, the Msx2 gene, and the Mashl gene.
- the Lrp4 gene is described in WO2004Z065599. Nato3
- the gene is described in WO2007Z021003.
- the Msxl gene and the Msx2 gene are described in WO2007Z021004.
- M ashl remains is a child, Kele J, Simplicio N, Fern AL, Mira H, Guillemot F, Arena s E, Ang SL. Neurogenin 2 is required for the development of ventral midbrain dopa minergic neurons. 2006 Feb; 133 (3): 495-505.
- the detection of a donomin production-euron growth progenitor cell marker gene other than the 187A5 gene is not particularly limited as long as it is performed using a method capable of detecting the expression of a known gene. Examples include a seed method and a nucleic acid amplification method.
- Dopamine production other than 187A5 protein-Euron proliferative progenitor cell marker protein refers to dopamine production other than 187A5 protein expressed in the midbrain ventricular ventricular region (VZ region)-Euron growth Examples include progenitor cell marker proteins, and preferably include proteins that are detected only in donomin-producing / euron proliferating progenitor cells.
- proteins of Lrp4 gene include proteins of Lrp4 gene, Nato3 gene, Msxl gene, Msx2 gene, and Mashl gene.
- the detection of dopamine production other than 187A5 protein-euron proliferative progenitor cell marker protein is not particularly limited as long as it is performed using a method capable of detecting the expression of a known protein.
- a method capable of detecting the expression of a known protein for example, the antigen-antibody reaction described above Law.
- the "post-mitotic dopaminergic neuron progenitor cell marker gene or its protein” includes a gene or its protein that is expressed in the midbrain ventral mantle layer (ML region), For example, Nurrl gene, Enl gene, En2 gene, Ptx3 gene, TH gene can be mentioned.
- ML region midbrain ventral mantle layer
- VZ region ventral ventricular region
- the Enl gene is described in J. Neurosci. 2001 21 (9): 3126-34.
- the En2 gene is described in J. Neurosci. 2001 21 (9): 3126-34.
- the Ptx3 gene is described in Pro Natl. Acad. Sci. 1997 94: 13305-10.
- the TH gene is described in Science. 1997 11; 276 (5310): 248-50. 65B13 gene [Katsu, Tetsuma, WO2004 / 038018, published here!
- the detection of the dopaminergic neuron progenitor cell marker gene or its protein after mitotic arrest is not particularly limited as long as it is performed using a known gene or a method capable of detecting the expression of the protein. Examples include a hybridization method, a nucleic acid amplification method, and an antigen-antibody reaction method.
- Dominine-producing neuron progenitor cell marker gene other than 187 ⁇ 5 gene or its protein refers to "Dopamine production other than 187-5 gene-Euron progenitor marker gene” or "Donomin production other than 187 ⁇ 5 protein-Euron progenitor cell” It's a “one-on-one protein”.
- Donomin production other than 187-5 gene-euron progenitor cell marker gene includes donomin production-euron progenitor cell marker gene other than 187A5 gene expressed in the midbrain, for example, The Lmxla gene can be mentioned.
- the detection of a donomin-producing-euron progenitor cell marker gene other than the 187A5 gene is not particularly limited as long as it is performed using a method capable of detecting the expression of a known gene.
- the hybridizer described above is used. Examples include the Chillon method and nucleic acid amplification method.
- Donomin production other than 187A5 protein-euron progenitor cell marker protein includes dormin production other than 187A5 protein expressed in the midbrain-euron progenitor cell marker protein.
- An example of such a protein is a protein of Lmxla gene.
- the detection of dopamine production other than 187A5 protein-euron progenitor cell marker protein is not particularly limited as long as it is performed using a method capable of detecting the expression of a known protein.
- the antigen-antibody reaction method described above is used. Can be mentioned.
- “Mature donomin production-euron cell marker gene” includes, for example, the DAT gene.
- the DAT gene is described in Development 2003 131: 1145-55.
- Mature donomin production-detection of euron cell marker gene or protein thereof is performed using a method capable of detecting expression of a known gene or protein thereof.
- the method is not particularly limited, and examples thereof include the above hybridization method, nucleic acid amplification method, and antigen-antibody reaction method.
- a gene construct in which a promoter of the 187A5 gene and a single gene are operably linked is used in combination, and not only the expression of the 187A5 gene or its protein,
- dopaminergic production-euron progenitor cells preferably dopaminergic production-euron proliferation precursor cells, can be detected or selected with higher accuracy.
- Detection of dopaminergic-euron progenitor cells using a vector comprising a gene construct in which a promoter of 187A5 gene and a marker gene are operably linked is carried out according to, for example, JP-A-2002-51775 can do.
- Donomin production-187A5 gene expressed in euron progenitor cells By introducing a marker gene that can be detected under the control of the promoter Z enhancer into each cell of the cell population, and detecting the expression of the marker gene, Dopaminergic neuron progenitor cells can be detected.
- a test cell sample is transformed with a vector comprising a gene construct in which a promoter of a gene according to the present invention and a marker gene are operably linked, and the marker gene in the test cell sample is transformed.
- dopaminergic neuron progenitor cells can be detected or selected.
- the cell in which the expression of the marker gene is detected can be determined with high accuracy as the detected or selected dopaminergic neuron progenitor cell, preferably a proliferative progenitor cell of donaminergic neuron.
- examples of the nucleotide sequence of the "promoter of the gene according to the present invention” include the nucleotide sequence of the promoter portion obtained by analysis of the expression region of the 187A5 gene described later. Including its modified sequences It is.
- the "marker gene” may be any marker gene that can be detected under the control of the promoter 187A5 gene promoter, such as GFP.
- the "gene construct” is a structure in which the 187A5 gene is linked to the upstream or downstream of the marker gene under the control of the expression control sequence of the 187A5 gene (including promoter, enhancer, etc.). You may have.
- a gene encoding a marker can be knocked into the 187A5 locus.
- a construct having a structure schematically described in FIGS. 2 to 4 in FIG. 15 can be exemplified.
- a detection kit for carrying out the detection method according to the present invention is provided.
- the first embodiment of the detection kit according to the present invention includes a detection kit for carrying out the first embodiment of the detection method according to the present invention. Specifically, the expression of the 187A5 gene is detected. And a kit comprising at least the probe according to the present invention. This probe may be labeled. This detection kit detects the expression of the 187A5 gene by a hybrid formation method. Accordingly, the detection kit of the first embodiment may optionally include various reagents for carrying out the hybridization method, such as substrate compounds used for detection of the label, hybridization buffer, instructions, and Z or Can further include appliances and the like.
- detection kits for highly accurate detection include the expression of dominamine production other than the 187A5 gene-euron proliferative progenitor cell marker gene or its protein, and the dopaminergic neuron progenitor cell marker gene after mitotic arrest. Expression or protein thereof, dopamine production other than 187A5 gene-expression of euron progenitor cell marker gene or protein thereof, or mature donomin production-euron cell marker probe, primer, primer capable of detecting expression of one gene or protein thereof A kit further comprising a set or antibody. These probes and primers The primer set or antibody may be labeled.
- This detection kit uses any of the hybridization, nucleic acid amplification, and antigen-antibody reaction methods to produce dopamine other than the 187A5 gene-expression of the proliferative progenitor cell marker gene or its protein, and dopamine production after mitotic arrest. -Expression of Lon progenitor cell marker gene or protein thereof, dopamine production other than 187A5 gene-Expression of Lon progenitor cell marker gene or protein thereof, or mature dopamine production-Expression of Lon cell marker gene or protein thereof are further detected.
- the second embodiment of the detection kit according to the present invention includes a detection kit for carrying out the second embodiment of the detection method according to the present invention. Specifically, the expression of the 187A5 gene is detected. And a kit comprising at least a primer according to the present invention or a primer set according to the present invention.
- This detection kit detects the expression of the 187A5 gene by nucleic acid amplification. Therefore, the detection kit according to the second aspect includes, as desired, various reagents for carrying out the nucleic acid amplification method, such as a buffer, an internal standard indicating that the amplification reaction can proceed normally, instructions, and Z or It can further include appliances and the like.
- detection kits for highly accurate detection include the expression of domin production-Lon proliferative progenitor cell marker genes other than the 187A5 gene or its protein, and expression of dopaminergic neuron progenitor cell marker genes after mitosis Or its protein, dopamine production other than 187A5 gene-expression of Lon progenitor cell marker gene or protein thereof, or mature domin production-expression of Lon cell marker gene or probe capable of detecting the protein, primer primer set or A kit further comprising an antibody can be mentioned. These probes, primer primer sets or antibodies may be labeled.
- This detection kit uses any of the hybridization, nucleic acid amplification, and antigen-antibody reaction methods to produce dopamine other than the 187A5 gene-expression of the proliferative progenitor cell marker gene or its protein, and dopamine production after mitotic arrest.
- -Ron progenitor cell marker gene expression or its protein dopamine production other than 187A5 gene-Ron progenitor cell marker gene expression or its protein, or mature dopamine production- The expression of the euron cell marker gene or its protein is further detected.
- a third embodiment of the detection kit according to the present invention includes a detection kit for carrying out the third embodiment of the detection method according to the present invention, specifically, for detecting the 187A5 protein.
- a kit comprising at least the antibody according to the present invention can be mentioned. This antibody may be labeled.
- This detection kit detects the expression of the 187A5 protein by detecting the antigen-antibody reaction. Therefore, the detection kit of the third embodiment is used in various reagents for carrying out an antigen-antibody reaction, for example, secondary antibodies used in ELISA methods, coloring reagents, buffers, instructions, and Z or instruments, if desired. Can be further included.
- detection kits for highly accurate detection include the expression of dominamine production other than the 187A5 gene-euron proliferative progenitor cell marker gene or its protein, and post-mitotic dopaminergic neuron progenitor cell marker gene. Expression or protein thereof, dopamine production other than 187A5 gene-expression of euron progenitor cell marker gene or protein thereof, or mature donomin production-euron cell marker probe, primer, primer capable of detecting expression of one gene or protein thereof A kit further comprising a set or antibody. These probes, primers, primer sets or antibodies may be labeled.
- This detection kit can be used to produce dopamine other than the 187A 5 gene-expression of the euron proliferative progenitor cell marker gene or its protein, dopamine production after mitotic arrest, by any of the hybridization, nucleic acid amplification, and antigen-antibody reaction methods. -Expression of euron progenitor cell marker gene or protein thereof, dopamine production other than 187A5 gene-Expression of euron progenitor cell marker gene or protein thereof, or mature dopamine production-Expression of euron cell marker gene or protein thereof are further detected.
- the present invention further comprises a vector comprising a gene construct in which a promoter of 187A5 gene and a marker gene are operably linked.
- a vector comprising a gene construct in which a promoter of 187A5 gene and a marker gene are operably linked. Examples include the detection kit according to the first to third aspects according to the invention.
- Detection reagent According to the present invention, a detection reagent for carrying out the detection method according to the present invention is provided.
- the first embodiment of the detection reagent according to the present invention includes a detection reagent for carrying out the first embodiment of the detection method according to the present invention. Specifically, the expression of the 187 A5 gene is detected. And a detection reagent comprising at least the probe according to the present invention. This probe may be labeled. This detection reagent detects the expression of the 187A5 gene by hybridization. Therefore, the detection reagent of the first embodiment may be used in various reagents for carrying out the hybridization method, for example, a substrate compound used for detection of a label, a hybridization buffer, instructions, and a reagent if desired. And Z or a device.
- detection reagents for highly accurate detection include dopamine production other than the 187A5 gene-expression of the euron proliferative progenitor cell marker gene, or its protein, and post-mitotic dopaminergic neuron progenitor cell marker gene. Expression or its protein, Dopamine production other than 187A5 gene-Euron progenitor cell marker gene expression or its protein, or mature dopamine production-Euron cell marker gene expression or probe, primer, primer capable of detecting the protein Examples include a detection reagent further comprising a set or an antibody. These probes, primers, primer sets or antibodies may be labeled. This detection reagent can be produced by any of hybridization, nucleic acid amplification, and antigen-antibody reaction methods.
- the second embodiment of the detection reagent according to the present invention includes a detection reagent for carrying out the second embodiment of the detection method according to the present invention. Specifically, the expression of the 187A5 gene is detected. And a detection reagent comprising at least the primer according to the present invention or the primer set according to the present invention.
- This detection reagent is a nucleic acid 187A5 gene expression is detected by amplification. Therefore, the detection reagent of the second aspect includes various reagents for carrying out the nucleic acid amplification method, for example, a buffer, an internal standard indicating that the amplification reaction can proceed normally, and a Z or It can further include appliances and the like.
- detection reagents for highly accurate detection include dopamine production other than the 187A5 gene-expression of the euron proliferative progenitor cell marker gene or its protein, and the dopaminergic neuron progenitor cell marker gene after mitotic arrest. Expression or its protein, Dopamine production other than 187A5 gene-Euron progenitor cell marker gene expression or its protein, or mature dopamine production-Euron cell marker gene expression or probe, primer, primer capable of detecting the protein Examples include a detection reagent further comprising a set or an antibody. These probes, primers, primer sets or antibodies may be labeled. This detection reagent can be produced by any of hybridization, nucleic acid amplification, and antigen-antibody reaction methods.
- the third embodiment of the detection reagent according to the present invention includes a detection reagent for carrying out the third embodiment of the detection method according to the present invention. Specifically, the 187A5 protein is detected. And a detection reagent comprising at least the antibody according to the present invention. This antibody may be labeled. This detection reagent detects the expression of 187A5 protein by detecting the antigen-antibody reaction. Therefore, the detection reagent of the third embodiment is various reagents for carrying out an antigen-antibody reaction, for example, a secondary antibody used in an ELISA method, a coloring reagent, a buffer solution, instructions, Z, or an instrument, if desired. Can further be included.
- detection reagents for highly accurate detection include dopamine production other than the 187A5 gene-expression of the euron proliferative progenitor cell marker gene or its protein. Expression of dopaminergic neuron progenitor marker gene or its protein after mitotic arrest, dopamine production other than 187A5 gene-expression of Ron progenitor cell marker gene or its protein, or mature dopamine production-expression of euron cell marker gene Examples include a detection reagent further comprising a probe, primer, primer set or antibody capable of detecting the protein. These probes, primers, primer sets or antibodies may be labeled. This detection reagent can be obtained by any of hybridization, nucleic acid amplification, and antigen-antibody reaction methods.
- the detection reagent for performing highly accurate detection further includes a vector comprising a gene construct in which a promoter of the 187A5 gene and a marker gene are operably linked.
- Examples include the detection reagent according to the first to third aspects according to the invention.
- the detection method according to the present invention can be applied to screening for a substance effective for inducing differentiation into dopaminergic progenitor cells. That is, by determining whether or not differentiation was induced in a dopamine producing-Lon progenitor cell, preferably a dopamine producing-Lon proliferative progenitor cell, by adding a candidate substance, using the expression of the 187A5 gene or its protein as an indicator. In addition, it is possible to screen a substance effective for inducing domin production into Ron progenitor cells.
- a screening method for a substance effective for inducing differentiation into dopaminergic neuron progenitor cells comprising the following steps:
- the cell that can be divided into cells that can be divided into dopamine-producing Ron progenitor cells is preferably a cell that can be divided into dopamine-producing Ron progenitor cells,
- the cultured cell force including neural progenitor cells differentiated from embryonic midbrain or ES cells can be collected.
- contact with a test substance means, for example, a cell that can be divided into dopamine producing-euron progenitor cells, preferably a dopamine producing-lon proliferating progenitor cell. It can be performed by adding a test substance to cultured cells containing the obtained cells.
- Test substances include synthetic low molecular weight compounds, proteins, synthetic peptides, purified or partially purified polypeptides, antibodies, bacterial release substances (including bacterial metabolites), nucleic acids (antisense, ribozyme, RNAi, etc.) Preferably, it is a compound or a salt thereof, or a solvate thereof (for example, a hydrate), but is not limited thereto.
- the “test substance” may be a novel substance or a known substance.
- steps (a-1) and (b-1) are used for the detection using the nucleic acid amplification method!
- steps (a-2) and (b-2) using steps (c-1) and (d-1) respectively for detection using an antigen-antibody reaction method, expression of 187A5 gene or The protein can be detected.
- the substance is detected as a dominogenic-Lon precursor. It can be determined that the substance is effective for inducing differentiation into cells, preferably dopaminergic progenitor-proliferating progenitor cells.
- the substance identified by the screening method according to the present invention can be used as an effective substance for inducing differentiation into domin-producing Ron progenitor cells, preferably dopaminergic neuron proliferative progenitor cells.
- a dopaminergic neuron progenitor cell further comprising the following steps: Methods are provided for screening for substances that are effective in inducing differentiation into:
- (iii 1) a step of detecting the expression of a dominamine production-euron proliferative progenitor cell marker gene other than the 187A5 gene or a protein thereof in the cells after contact with the test substance.
- step (ii) expression of 187A5 gene or its protein is detected, and in step (iii-1), dormin production other than 187A5 gene-expression of euron proliferative progenitor cell marker gene
- the substance is determined with high accuracy as an effective substance for induction of domino-producing euron progenitor cells, preferably dopamine-producing euron progenitor cells. be able to.
- the step (iii-1) may be performed before or after the step (ii) as long as it is performed after the step (i).
- a screening method for a substance effective for inducing differentiation into dopaminergic neuron progenitor cells further comprising the following steps:
- (iii 2) a step of detecting expression of dopamine producing neuron progenitor cell marker gene or protein thereof after mitotic arrest in the cells after contact with the test substance.
- step (ii) the expression of the 187A5 gene or its protein was detected, but in step (iii 2), the ability to detect dopamine production-euron progenitor cell marker gene or its protein after mitotic arrest was detected.
- the substance can be determined with high accuracy as an effective substance for inducing differentiation into dopaminergic progenitor cells, preferably donominergic progenitor cells.
- Step (iii 2) may be performed before or after step (ii) as long as it is performed after step (i).
- Dopamine production other than 187A5 gene-Euron proliferative progenitor cell marker gene or its protein refers to "Dominamine production other than 187A5 gene-Euron proliferative progenitor cell marker gene” or donomin production other than ⁇ 187 ⁇ 5 protein-Euron “Proliferative progenitor cell marker protein”.
- Dominine production other than 187A5 gene-Euron proliferative progenitor cell marker gene refers to production of dominomin other than the 187A5 gene expressed in the ventral ventricular region (VZ region) of the midbrain- Examples include the euron proliferative progenitor cell marker gene, such as the Lrp4 gene, the Nato3 gene, the Msxl gene, the Msx2 gene, and the Mashl gene.
- the detection of a dopaminergic prolonger progenitor cell marker gene other than the 187A5 gene is not particularly limited as long as it is carried out using a method capable of detecting the expression of a known gene.
- the above hybridizer Examples include the Chillon method and nucleic acid amplification method.
- Dopamine production other than 187A5 protein-Lon proliferative progenitor cell marker protein includes dopamine production other than 187A5 protein expressed in the ventral ventricular region (VZ region) of the midbrain-Lon proliferation A progenitor cell marker protein is preferable, and a protein that is detected only in domin producing-Lon proliferative progenitor cells is preferable.
- proteins include the Lrp4 gene, the Nato3 gene, and the Msxl gene.
- Examples include Msx2 gene and Mashl gene protein.
- the detection of dopamine production other than 187A5 protein-Lon proliferative progenitor cell marker protein is not particularly limited as long as it is performed using a method capable of detecting the expression of a known protein.
- a method capable of detecting the expression of a known protein for example, the antigen-antibody reaction described above Law.
- Post-mitotic dopaminergic neuron progenitor cell marker gene or protein thereof includes a gene or its protein expressed in the midbrain ventral mantle layer (ML region), For example, Nurrl gene, Enl gene, En2 gene, Ptx3 gene TH gene can be mentioned.
- ML region midbrain ventral mantle layer
- VZ region ventral ventricular region
- the detection of a dopaminergic neuron progenitor cell marker gene or its protein after mitotic arrest is not particularly limited as long as it is performed using a known gene or a method capable of detecting the expression of the protein. Examples include a hybridization method, a nucleic acid amplification method, and an antigen-antibody reaction method.
- a method for screening a substance effective for inducing differentiation into dopaminergic neuron progenitor cells further comprising the following steps:
- the cell after contact with the test substance is transformed with a vector comprising a gene construct in which the promoter of the 187A5 gene and the marker gene are operably linked, and the marker gene in the cell is transformed. Detecting the expression of.
- step (ii) the expression of the 187A5 gene or its protein is detected, and
- step (iii-3) when the expression of the marker gene is detected, the substance is effectively used for induction of doimin-producing euron progenitor cells, preferably dopamine-producing euron proliferative progenitor cells.
- a substance can be determined with high accuracy.
- Step (iii-3) may be performed before or after step (ii) as long as it is performed after step (i). Furthermore, it may be performed after step (iii-1) or step (iii-2).
- the detection method according to the present invention can detect or select dopaminergic-euron progenitor cells.
- Dopaminergic-euron progenitor cells can be used to treat Parkinson's disease. Therefore, dopaminergic neuron progenitor cells used for the treatment of Parkinson's disease can be produced from the detected or selected dopaminergic-euron progenitor cells using 187A5 gene expression or its protein as an index.
- the dopamine producing-euron progenitor cell is preferably a dopamine producing-euron proliferating progenitor cell.
- a therapeutic agent for Parkinson's disease comprising dopaminergic-euron progenitor cells, preferably donomin-producing euron proliferative progenitor cells detected or selected by the detection method according to the present invention.
- dopamine producing-euron progenitor cells preferably donomin producing-euron proliferation, detected or selected by the detection method according to the present invention for the manufacture of a medicament for use in the treatment of Parkinson's disease Use of progenitor cells is provided.
- dopaminergic progenitor-euron progenitor cells preferably donomin progenitor-euron proliferative progenitor cells detected or selected by the detection method according to the present invention
- a method of treating Parkinson's disease comprises the step of transplanting into a mammalian brain.
- detection includes “identification”. “Detection” includes not only the case where the target cell is identified as a specific type of cell, but also the case where the target cell is not identified as a specific type of cell.
- Dolphin production-Lrp4 gene strength has been identified as a cell surface marker for isolating Lon proliferative progenitor cells (WO2004 / 065599), and anti-Lrp4 antibody is used! It is possible to separate. Therefore, the isolation of genes selective for dopaminergic progenitor-proliferating progenitor cells and their sequence analysis are described below.
- rat 13.5 day embryonic mesencephalon ventral and posterior cerebral ventral side were dispersed using accumax (emestetanosystems), then fixed and not permeabilized, anti-Lrp4 monoclonal antibody (source: Hypridoma (Accession Number FERM BP—10315 and Accession Number FERM BP—10316), 1Z10 dilution, 1% urine fetal serum (JRH), 5% rat fetal serum (JRH), lm M EDTA (Invitrogen) / PBS (Sigma )) For 30 minutes at 4 ° C.
- Amplification conditions consisted of incubation at 72 ° C for 5 minutes, then 94 ° C for 30 seconds, 65 ° C for 30 seconds, and And 20 minutes of reaction at 72 ° C for 2 minutes, and finally incubation at 72 ° C for 2 minutes.
- ad2S CAGCTCCACAACCTACATCATTCCGT (SEQ ID NO: 29)
- ad2A ACGGAATGATGT (SEQ ID NO: 30)
- PCR was performed in the following reaction system using 4 ng, 0.4 ng, and 0.04 ng of cDNA corresponding to the amplified cDNA in a saddle type.
- Lrp4 TAGTCTACCACTGCTCGACTGTAACG (SEQ ID NO: 31)
- Lmxla TGGTTCAGGTGTGGTTCCAGAACCAG (SEQ ID NO: 33)
- the Lrp4 gene has the same level of expression in both midbrain Lrp4-positive cells and hindbrain Lrp4-positive cells.
- Dopamine production-euron and dopamine production- It was confirmed that the Lmxla gene, which is a marker gene for a single progenitor cell (WO2005Z052190), was strongly expressed only in midbrain Lrp4-positive cells (Fig. 3).
- midbrain L rp4 positive cells are thought to include dopaminergic-euron proliferative progenitors and not hindbrain Lrp4 positive cells.
- 187A5 ACCAGGAAGGACAATGCCATTCGTCC (SEQ ID NO: 35)
- cDNA was amplified from human fetal brain mRNA (Clontech) using 5, RACE core kit (TAKARA), and self-ligation was performed. The following primer was used to amplify the 5 ′ end of the cDNA, and the resulting fragment was cloned into pCRII (Invitrogen) and sequenced.
- PCR amplification was performed in 35 cycles for primary PCR, and secondary PCR was amplified in 20 cycles using a 10-fold diluted primary PCR product in a cage.
- cDNA was amplified using RNA PCR kit (TAKARA), and PCR was performed using this in a saddle type.
- TAKARA RNA PCR kit
- the remaining region was prepared by combining the following primers F12 and R5, and F13 and R4.
- Human 187A5 F12 CTACCTGTGAGCTACCACATCCTCAG (SEQ ID NO: 44)
- Human 187A5 R5 TTCTCTGCCAGGATGGAGTCAGACAG (SEQ ID NO: 45)
- Human 187A5 F13 ACTGGCAGTTCGACATCACTCACCTG (SEQ ID NO: 46)
- Human 187A5 R4 TGCAGAGG
- Example 21 Expression analysis of 187A5 gene by in situ hybridization
- the following protocol was used for in situ hybridization.
- Expression analysis of 187A5 and Lrp4 mRNA was performed by dialysis.
- a DIG probe was prepared by the following method.
- mice obtained from SLC 12. Excise the midbrain hindbrain region from the 5th day embryo, prepare total RNA using RNeasy mini kit (Qiagen), and use cDNA synthesis kit (TAKARA) Strand cDNA was synthesized. Next, 187A5 and Lrp4 cDNA were amplified in the following reaction system using the synthesized cDNA.
- Amplification conditions were 94 ° C for 5 minutes, then 94 ° C for 30 seconds, 65 ° C for 30 seconds, and
- reaction was carried out for 35 cycles at 72 ° C for 2 minutes, and finally incubated at 72 ° C for 2 minutes.
- Lrp4 GACAGTGAACCTTTGGTCACTGATGG (SEQ ID NO: 50)
- the amplified cDNA fragment was cloned into pCRII (Invitrogen), and this was used in a cage form to synthesize a DIG probe in the following reaction system (all reagents purchased from Roche).
- RNA polymerase (T7 or SP6) 2 ⁇ ⁇
- mouse 12.5 day embryos were removed and fixed with 4% PFA (WAKO) ZPBS for 2 hours at 4 ° C, and then with 20% sucrose (WAKO) ZPBS at 4 ° C. It was replaced with ⁇ and embedded in OCT (Sakura Seiki).
- a section having a thickness of 12 m was prepared, dried on a slide glass, and then fixed again with 4% PFA at room temperature for 30 minutes. After washing with PBS, hybridization (1 g / ml DIG RNA probe, 50% formamide (Nacalai tex), 5xSSC, 1% SDS, 50 ⁇ g / ml yeast RNA (Sigma), to 50 gZml 68. C for 40 hours.
- wash (50% formamide, 5xSSC, 1% SDS) at 68 ° C
- Further washing (50% formamide, 5xSSC) was performed at 68 ° C.
- blocking (blocking agent: Roche) was performed.
- Alkaline phosphatase-labeled anti-DIG antibody (DAKO) was reacted at 4 ° C, washed (lxTBST, 2 mM levamisole), and then developed with NBT / BCIP (DAKO) as a substrate.
- the 187A5 mRNA in the 12.5 day embryo which is the time when donomin production-euron occurs, is the most ventral brain of the midbrain where Lrp4-positive dopamine production-euron progenitor cells are present. It was revealed that it was selectively expressed in the ventricular zone (VZ) and the backmost roof plate region of the midbrain (Fig. 4). On the other hand, no expression was observed on the ventral side of the hindbrain, and it was confirmed that it was not expressed on hindbrain floor plate cells positive for Lrp4.
- 187A5 mRNA is selectively expressed in dopaminergic-euron proliferative progenitor cells.
- Cells that simultaneously express both Lrp4 and 187A5 genes are limited to dopamine-producing euron proliferative progenitor cells in the ventral ventricular region of the midbrain. Donomin production-Euron proliferative progenitor cells could be identified.
- Example 31 Doronian cattle induced to differentiate from ES cells. Current state of 187A5 transmission in neurons.
- CCE ES cells
- PCR was carried out in the following reaction system using 4 ng, 0.4 ng, and 0.04 ng of the cDNA corresponding to the amplified cDNA in the vertical form, respectively.
- Lmxla TGGTTCAGGTGTGGTTCCAGAACCAG (SEQ ID NO: 33)
- the 187A5 gene was expressed when differentiation was induced by any method, and particularly strongly expressed in Lr p4-positive cells (Figs. 5 and 6). Therefore, 187A5 mRNA can be used only in cells derived from mouse and rat fetal mesencephalon, and in differentiation-induced cells using the SDIA method and 5-stage method! It was revealed that it was expressed in cells. In other words, the 187A5 gene is a useful marker for discriminating dominamine-producing euron progenitor cells that are induced in vitro from ES cells in vitro only with dopaminergic neuron progenitor cells derived from fetal midbrain. It became clear that there was.
- the 187A5 protein has one sequence that appears to be a transmembrane region. If the 187A5 protein is expressed on the cell surface! / It is expected to be useful for the preparation of transplanted materials such as Parkinson's disease, because it becomes possible to isolate 187A5-positive living cells by cytometry. Therefore, the intracellular localization of 187A5 protein was examined.
- a construct was prepared by ligating the region encoding the amino acid up to the 45th amino acid with the N-terminal force and a secreted alkaline phosphatase cDNA lacking the signal sequence, and transfected into 293E cells. The culture supernatant on the 4th day of culture was collected, and alkaline phosphatase activity was measured using Aurora kit (ICN) (FIG. 7).
- ICN Aurora kit
- a construct in which a HA tag was added to the C-terminus of 187A5 was transfected into NS20Y cells. Two days later, after washing the cells twice with chilled PBS, 0.5 mg Zml of EZ—li nk Sulfo-NHS-SS-Biotin (PIERCE) (PBS + ImM CaCl 0.5 mM M 5 ml of (dissolved in gCl) was added and reacted at room temperature for 30 minutes. Wash twice with cold PBS
- a lysis buffer 1% SDS, 10 mM Tris-CI, lOOmM NaCl, ImM EDTA 600 1 and subjected to sonication. After centrifugation at 14000 rpm for 3 minutes, the supernatant was collected. Streptavidin beads (PIERCE) 20 ⁇ 1 were collected, rotated for 1 hour at room temperature, and washed twice with lysis buffer. Add 75 ⁇ l of SDS-PAGE sample buffer to the beads, collect the bound protein by centrifugation at 100 ° C for 3 minutes, and perform Western blotting with anti-HA antibody (Roche). 187A5 protein was detected.
- a lysis buffer 1% SDS, 10 mM Tris-CI, lOOmM NaCl, ImM EDTA
- 187A5 protein could be detected by FACS method.
- a construct was constructed in which a cDNA encoding the C-terminal side of the predicted 187A5 cleavage site (the 39th amino acid) was ligated immediately below the signal sequence of Preprotrypsin and the sequence encoding the FLAG tag. When this construct is expressed, 187A5 with a FLAG tag attached to the N-terminus can be expressed after cleavage of the signal sequence.
- This construct was introduced into the B300. 19 cells using a retrovirus vector.
- 187A5 is considered to be useful as a marker for isolating live cells of dopaminergic neuron progenitor cells.
- Example 51187A5 protein expression analysis Of the 187A5 gene, using the gene sequence encoding the extracellular region, an anti-187A5 antibody was prepared by the following protocol, and expression analysis was performed by immunohistochemical staining.
- Cy3 labeled anti-rat IgG antibody (Jackson, lO ⁇ g / ml, 2.5% Block Ace ZPBS) was allowed to react at room temperature for 1 hour, washed in the same manner, and then washed with PBS (-) at room temperature for 5 minutes. And sealed.
- Example 61 Detection of cells in which 187A5 protein is present
- the mouse E12.5 fetal midbrain and ventral region of the hindbrain were dispersed using a cell dispersion buffer (Invitrogen), and then fixed and not permeabilized, and the anti-187A5 monoclonal antibody ( The purified antibody was diluted with 1% sushi fetal serum, ImM EDTAZPBS) and anti-Lrp4 antibody (culture supernatant 1Z2 diluted, 1% sushi fetal serum, ImM EDTAZPBS), and stained at 4 ° C for 20 minutes.
- a cell population containing 187A5 protein was detected (Fig. 12).
- cells with 187A5 protein can be detected without fixation and permeabilization, cells with 187A5 protein can be separated in the state of living cells by using a flow cytometer with a cell sorter. It is suggested that it is possible.
- 187A5 protein is present in all midbrain Lrp4-positive cells, that is, donomin-producing euron progenitor cells, whereas 187 A5 protein is present in hindbrain Lrp4-positive cells that do not contain dopamine-producing neuron progenitor cells. Shina! Was confirmed (Fig. 12)
- the cultured cells were fixed with 2% PFAZPBS at 4 ° C for 20 minutes, and washed twice with PBS at 4 ° C for 10 minutes. Thereafter, permeabilization treatment was performed with 0.3% Triton X-lOOZPBS at room temperature for 30 minutes, and blocking was performed with 10% normal donkey serumZ Block Ace at room temperature for 20 minutes.
- anti-Nurrl antibody in house culture supernatant lZlOOO diluted, 10% normal do nkey serum, 2.5% Block Ace, 0.1% Triton X—lOOZPBS), anti-HuC ZD rod (Molecular Probe ⁇ 1/50 ⁇ 4 ⁇ g / mU 10% normal donkey seru m, 2.5% block Ace, 0.1% Triton X—IOOZPBS) was allowed to react at room temperature for 1 hour, followed by 4 ° C reaction.
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EP07741445.6A EP2006382B1 (en) | 2006-04-11 | 2007-04-11 | Dopamine-producing neuron progenitor cell marker 187a5 |
CA002649250A CA2649250A1 (en) | 2006-04-11 | 2007-04-11 | Dopaminergic neuron progenitor cell marker 187a5 |
JP2008510971A JP5033121B2 (ja) | 2006-04-11 | 2007-04-11 | ドーパミン産生ニューロン前駆細胞マーカー187a5 |
US12/296,915 US8198081B2 (en) | 2006-04-11 | 2007-04-11 | Dopaminergic neuron progenitor cell marker 187A5 |
US13/492,733 US8604173B2 (en) | 2006-04-11 | 2012-06-08 | Dopaminergic neuron progenitor cell marker 187A5 |
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Cited By (4)
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WO2013015457A1 (en) * | 2011-07-27 | 2013-01-31 | Kyoto University | Novel markers for dopaminergic neuron progenitor cells |
JP2014516528A (ja) * | 2011-05-20 | 2014-07-17 | ザ マクレーン ホスピタル コーポレーション | ニューロン前駆細胞および使用法 |
WO2015034012A1 (ja) | 2013-09-05 | 2015-03-12 | 国立大学法人京都大学 | 新規ドーパミン産生神経前駆細胞の誘導方法 |
US11898163B2 (en) | 2016-04-22 | 2024-02-13 | Kyoto University | Method for producing dopaminergic neuron progenitor cell |
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WO2016026438A1 (en) * | 2014-08-19 | 2016-02-25 | Tongji University | Methods and compositions for selective generation of dopaminergic precursors |
WO2017087866A1 (en) | 2015-11-20 | 2017-05-26 | Grand Valley State University | Nato3 mutant polypeptides and uses thereof |
WO2024174707A1 (en) * | 2023-02-21 | 2024-08-29 | Center For Excellence In Brain Science And Intelligence Technology, Chinese Academy Of Sciences | METHOD FOR IDENTIFYING AN mDA PROGENITOR CELL |
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EP2006382A1 (en) | 2008-12-24 |
US8604173B2 (en) | 2013-12-10 |
JP5033121B2 (ja) | 2012-09-26 |
US20120252021A1 (en) | 2012-10-04 |
JPWO2007119759A1 (ja) | 2009-08-27 |
US8198081B2 (en) | 2012-06-12 |
CA2649250A1 (en) | 2007-10-25 |
CN101466836A (zh) | 2009-06-24 |
EP2006382B1 (en) | 2016-08-03 |
US20110008769A1 (en) | 2011-01-13 |
EP2006382A4 (en) | 2010-09-08 |
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