WO2014027684A1 - 心筋梗塞の修復再生を誘導する多能性幹細胞 - Google Patents
心筋梗塞の修復再生を誘導する多能性幹細胞 Download PDFInfo
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- WO2014027684A1 WO2014027684A1 PCT/JP2013/071981 JP2013071981W WO2014027684A1 WO 2014027684 A1 WO2014027684 A1 WO 2014027684A1 JP 2013071981 W JP2013071981 W JP 2013071981W WO 2014027684 A1 WO2014027684 A1 WO 2014027684A1
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- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/28—Bone marrow; Haematopoietic stem cells; Mesenchymal stem cells of any origin, e.g. adipose-derived stem cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
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- C12N5/0607—Non-embryonic pluripotent stem cells, e.g. MASC
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- C12N2506/00—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells
- C12N2506/03—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells from non-embryonic pluripotent stem cells
Definitions
- the present invention relates to a cell preparation in regenerative medicine. More specifically, the present invention relates to a cell preparation containing pluripotent stem cells effective for repair and regeneration of heart tissue damaged by myocardial infarction.
- Myocardial infarction caused by myocardial necrosis caused by coronary artery occlusion causes acute heart death and chronic heart death, and is therefore an important issue to be solved in clinical medicine.
- the mortality rate is as high as 35-50%, and 60-70% of deaths are deaths within 1-2 hours after onset.
- the acute phase is safe, if the myocardial necrosis of the first attack is large, there is a high risk of recurrence of myocardial infarction and associated heart failure. Therefore, in the treatment of myocardial infarction, prompt treatment is required when a seizure occurs, and it is important to keep the size of the necrotized myocardium, that is, the infarct size as small as possible.
- myocardial infarction such as severe large myocardial infarction
- recurrent therapy such as thrombolysis and revascularization is performed for myocardial infarction.
- the cardiomyocytes are damaged due to reperfusion injury or the like, and resuscitation therapy alone does not necessarily provide a satisfactory therapeutic effect.
- drugs that are expected to have a myocardial protective effect as an adjunct therapy for resuscitation therapy, but no satisfactory drugs have yet been found.
- severe large myocardial infarction if the necrotic myocardial tissue is regenerated and left ventricular remodeling can be improved, the prognosis is improved.
- iPS cells have been reported as adult-derived pluripotent stem cells.
- a specific gene or a specific gene is identified in the dermal fibroblast fraction, which is a mesenchymal cell.
- iPS cells have a high tumorigenic ability, and therefore there is an extremely high hurdle for clinical application.
- SSEA-3 Stage-Specific Embryonic Antigen-3
- Muse cells Multilineage-differentiating Stress Enduring cells; Muse cells
- Muse cells Muse cells
- Muse cells can be concentrated by stimulating the mesenchymal cell fraction with various stresses.
- Patent Document 2 Non-Patent Document 3
- the expected therapeutic effect can be obtained by using Muse cells for prevention and / or treatment of myocardial infarction such as severe large myocardial infarction and accompanying heart failure.
- An object of the present invention is to provide a new medical use using pluripotent stem cells (Muse cells) in regenerative medicine. More specifically, an object of the present invention is to provide a cell preparation for treating myocardial infarction (especially severe large myocardial infarction) and preventing and / or treating heart failure associated therewith, comprising Muse cells. .
- the present inventors used Japanese white rabbits to administer Muse cells by intravenous injection to myocardial infarction induced by coronary ischemia (30 minutes). It has been found that it accumulates in the myocardial tissue and differentiates into myocardial cells within this damaged myocardial tissue, leading to reduction of infarct size and improvement or recovery of cardiac function, thus completing the present invention.
- the present invention is as follows.
- a cell preparation for treating myocardial infarction comprising SSEA-3-positive pluripotent stem cells isolated from mesenchymal tissue or cultured mesenchymal cells in a living body.
- the cell preparation according to [1], wherein the SSEA-3-positive pluripotent stem cell by external stress stimulation contains a concentrated cell fraction.
- the pluripotent stem cell is a pluripotent stem cell having all of the following properties: (I) low or no telomerase activity; (Ii) has the ability to differentiate into cells of any germ layer of the three germ layers; (Iii) no neoplastic growth; and (iv) self-renewal ability.
- Muse cells are administered to a subject suffering from myocardial infarction, particularly severe large myocardial infarction, from a vein or the like to selectively accumulate in a damaged myocardial tissue, and the Muse cell differentiates into myocardium in the tissue.
- Myocardial infarct size can be dramatically reduced by the mechanism of myocardial tissue regeneration.
- part of a rabbit myocardial infarction model is shown.
- the infarct site was determined by triphenyltetrazolium chloride (TTC) staining method. A non-stained area surrounded by a broken line is an infarcted part.
- TTC triphenyltetrazolium chloride
- the right panel is a tissue section 14 days after reperfusion where reperfusion was performed 30 minutes after ischemia and Muse cells were administered intravenously 24 hours after reperfusion.
- the left panel is a tissue section in which physiological saline is intravenously administered instead of Muse cells. Muse cell transplantation significantly reduced the infarct site.
- the infarct site was determined by the TTC staining method, and the infarct size was calculated as the ratio (%) of the infarct region to the ischemic region.
- staining method is shown. In this MT staining method, the tissue composed of living cells is stained red, while the tissue in the infarcted area that is made into collagenous fibers is not stained and is observed pale.
- MT Masson trichrome
- FIG. 5 shows the differentiation of Muse cells into cardiomyocytes in heart tissue. Infarcted sites and non-infarcted sites are distinguished from each other using a broken line in the left panel as a boundary line. Cardiomyocytes were stained red by rhodamine phalloidin staining (middle panel).
- the cardiac function after Muse cell transplantation shows the results of examining changes in blood pressure over time ( ⁇ dp / dt; p: blood pressure, t: time) as an index.
- the upper panel shows the measurement result of the cardiac contraction function (+ dp / dt), and the lower panel shows the measurement result of the cardiac expansion function ( ⁇ dp / dt).
- 2D shows a 2D echocardiogram of the left ventricular parasternal left ventricular long axis.
- the left panel shows an image of the left ventricle of a rabbit administered with saline (control), and the right panel shows an image of the left ventricle of a rabbit transplanted with Muse cells.
- LVDd left ventricular end diastolic diameter
- EF ejection rate
- FS left ventricular diameter shortening rate
- FIG. 9 corresponds to the result shown in FIG. 8 and shows photographs in which one is arbitrarily selected from the samples of each transplant group.
- the result of having examined the differentiation state of the Muse cell accumulated in the infarct site is shown.
- the presence or absence of expression of troponin I known as a myocardial marker was examined by fluorescent staining in the same manner as in FIG. Green indicates GFP staining (Muse cells), red indicates troponin I staining, and blue indicates DAPI staining (stains cell nuclei).
- LVDd left ventricular end diastolic diameter
- LVDs left ventricular end systolic diameter
- EF ejection rate
- FS left ventricular diameter shortening rate
- the present invention relates to a cell preparation for treating myocardial infarction comprising SSEA-3 positive pluripotent stem cells (Muse cells).
- SSEA-3 positive pluripotent stem cells Muse cells
- the present invention aims to treat myocardial infarction, particularly severe large myocardial infarction, and accompanying heart failure using a cell preparation containing SSEA-3-positive pluripotent stem cells (Muse cells).
- myocardial infarction refers to myocardial necrosis caused by occlusion of a coronary artery.
- Heart failure refers to a syndrome caused by a failure of cardiac function that pushes out a sufficient amount of blood flow, resulting in decreased cardiac output and associated increase in venous pressure, and the various clinical symptoms that result. included.
- Myocardial infarction causes acute heart death and chronic heart death.
- the mortality rate is as high as 35-50%, and 60-70% of deaths are deaths within 1-2 hours after onset.
- the acute phase is safe, if the myocardial necrosis of the first attack is large, the risk of recurrence of myocardial infarction is high. Therefore, in the treatment of myocardial infarction, prompt treatment is required when a seizure occurs, and it is important to keep the size of the necrotic myocardium, that is, the infarct size as small as possible.
- Such classification includes, for example, classification by time course, morphological classification (intramyocardial range, site, size of necrosis, etc.), myocardial necrosis, ventricular reconstruction after infarction, hemodynamic classification (Related to treatment, prognosis, etc.), classification by clinical severity, etc.
- morphological classification intramyocardial range, site, size of necrosis, etc.
- myocardial necrosis ventricular reconstruction after infarction
- hemodynamic classification Related to treatment, prognosis, etc.
- classification by clinical severity etc.
- a myocardial infarction having a high degree of severity and having suffered from myocardial necrosis in a wider area is particularly referred to as “severe large myocardial infarction.
- severe large myocardial infarction For example, complete occlusion of the proximal part of the left coronary artery.
- left ventricular remodeling after myocardial infarction refers to hypertrophy and stroma (extracellular matrix) of myocardial cells at the non-infarcted site as a compensation for reduced cardiac function due to non-thinning of the infarcted site after myocardial infarction This refers to a series of changes such as increase in heart rate and enlargement of the heart lumen. Since long-term prognosis after myocardial infarction correlates with the degree of left ventricular dysfunction, suppressing left ventricular remodeling is essential to maintain and preserve left ventricular function.
- the cell preparation of the present invention can be treated when the time required for reperfusion is very long, or when reperfusion and catheter therapy are not successful. That is, according to the present invention, a cell preparation containing Muse cells for the treatment of myocardial infarction based on myocardial tissue regeneration, including prevention of heart failure due to left ventricular remodeling is provided. .
- Pluripotent stem cells The pluripotent stem cell used in the cell preparation of the present invention was found by Mr. Dezawa, one of the present inventors, in the human body and named it “Muse (Multilineage-differentiating Stress Ending) cell”. It is a cell. Muse cells can be obtained from skin tissues such as bone marrow fluid and dermal connective tissue, and are also scattered in connective tissues of each organ. In addition, this cell is a cell having the properties of both pluripotent stem cells and mesenchymal stem cells. For example, the cell surface markers “SSEA-3 (Stage-specific embryonic antigen-3)” and “ Identified as "CD105" double positive.
- SSEA-3 Serial-specific embryonic antigen-3
- Muse cells or cell populations containing Muse cells can be separated from living tissues using, for example, these antigen markers as indicators.
- Muse cells are stress-resistant and can be concentrated from mesenchymal tissues or cultured mesenchymal cells by various stress stimuli.
- a cell fraction in which Muse cells are concentrated by stress stimulation can also be used. Details such as the separation method, identification method, concentration method, and characteristics of Muse cells are disclosed in International Publication No. WO2011 / 007900.
- pluripotent stem cells separated from living mesenchymal tissue or cultured mesenchymal tissue using SSEA-3 as an antigen marker which can be used in cell preparations for treating myocardial infarction (Muse cells) or a cell population containing Muse cells may be simply referred to as “SSEA-3 positive cells”.
- Muse cells or cell populations containing Muse cells can be obtained from living tissue (eg, using antibodies against the cell surface marker SSEA-3 alone, or with antibodies against SSEA-3 and CD105, respectively) From mesenchymal tissue).
- living body means a living body of a mammal. In the present invention, the living body does not include embryos whose developmental stage is earlier than the fertilized egg or blastocyst stage, but includes embryos in the developmental stage after the blastocyst stage including the fetus and blastocyst.
- Mammals include, but are not limited to, primates such as humans and monkeys, rodents such as mice, rats, rabbits, guinea pigs, cats, dogs, sheep, pigs, cows, horses, donkeys, goats, ferrets, etc. It is done.
- Muse cells used in the cell preparation of the present invention are clearly distinguished from embryonic stem cells (ES cells) and embryonic germ stem cells (EG cells) in that they are derived from living tissues.
- ES cells embryonic stem cells
- EG cells embryonic germ stem cells
- “Mesenchymal tissue” refers to tissues such as bone, cartilage, fat, blood, bone marrow, skeletal muscle, dermis, ligament, tendon, heart, and their connective tissues.
- Muse cells can be obtained from bone marrow or skin.
- the present invention aims to provide a cell preparation for the purpose of myocardial regeneration.
- a cell preparation for the purpose of myocardial regeneration For example, it is preferable to collect a mesenchymal tissue from a living body and separate and use Muse cells from this tissue.
- the Muse cell used may be autologous to the recipient who receives the cell transplant, or may be another family.
- a Muse cell or a cell population containing a Muse cell can be separated from a living tissue using, for example, SSEA-3 positive and CD105 positive as an index.
- human adult skin has various types of stem cells. And are known to contain progenitor cells.
- Muse cells are not the same as these cells.
- Such stem cells and progenitor cells include skin-derived progenitor cells (SKP), neural crest stem cells (NCSC), melanoblast (MB), perivascular cells (PC), endothelial progenitor cells (EP), adipose-derived stem cells (ADSC). ).
- Muse cells can be isolated using “non-expression” of a marker unique to these cells as an index.
- Muse cells are CD34 (EP and ADSC markers), CD117 (c-kit) (MB markers), CD146 (PC and ADSC markers), CD271 (NGFR) (NCSC markers), NG2 (PC marker), vWF factor (von Willebrand factor) (EP marker), Sox10 (NCSC marker), Snai1 (SKP marker), Slug (SKP marker), Tyrp1 (MB marker), and At least one of 11 markers selected from the group consisting of Dct (MB marker), for example 2, 3, 4, 5, 6, 7, 8, 9, 10 The non-expression of individual or eleven markers can be separated into indicators.
- non-expression of CD117 and CD146 can be separated as an index
- non-expression of CD117, CD146, NG2, CD34, vWF and CD271 can be separated as an index
- the non-expression of 11 markers can be separated as an index.
- the Muse cell having the above characteristics used in the cell preparation of the present invention is as follows: (I) low or no telomerase activity; (Ii) has the ability to differentiate into cells of any germ layer of the three germ layers; It may have at least one property selected from the group consisting of (iii) showing no neoplastic growth; and (iv) having a self-renewal capability.
- the Muse cell used in the cell preparation of the present invention has all the above properties.
- telomerase activity is low or absent means that, for example, when telomerase activity is detected using TRAPEZE XL telomerase detection kit (Millipore), it is low or cannot be detected.
- “Low” telomerase activity means, for example, telomerase activity comparable to that of human fibroblasts, or telomerase activity of 1/5 or less, preferably 1/10 or less, compared to Hela cells. It means that Regarding (ii) above, the Muse cell has the ability to differentiate into three germ layers (endoderm, mesodermal, and ectoderm) in vitro and in vivo, for example, induction culture in vitro Can differentiate into skin, liver, nerve, muscle, bone, fat and the like. In addition, when transplanted to the testis in vivo, it may show the ability to differentiate into three germ layers.
- Muse cells proliferate at a growth rate of about 1.3 days in suspension culture, but stop growing in about 10 days. Further, when transplanted to the testis, the Muse cells have cancer for at least half a year. It has the property of not becoming Moreover, about said (iv), a Muse cell has self-renewal (self-replication) ability.
- self-renewal refers to culturing cells contained in an embryoid body-like cell cluster obtained by suspension culture of Muse cells, and forming an embryoid body-like cell cluster again.
- the self-renewal may be repeated once or multiple times.
- the cell fraction containing Muse cells used in the cell preparation of the present invention gives an external stress stimulus to living mesenchymal tissue or cultured mesenchymal cells, and is a cell other than cells resistant to the external stress.
- a cell fraction enriched with SSEA-3 positive and CD105 positive pluripotent stem cells having all of the following properties obtained by a method comprising killing cells and collecting surviving cells: Good.
- Iv has the ability to differentiate into three germ layers;
- V) exhibits no neoplastic growth; and
- vi has the ability to self-renew.
- the external stress includes protease treatment, culture at low oxygen concentration, culture under low phosphate conditions, culture at low serum concentration, culture under low nutrient conditions, culture under exposure to heat shock, low temperature Incubation in freezing, culture in the presence of harmful substances, culture in the presence of active oxygen, culture under mechanical stimulation, culture under shaking treatment, culture under pressure treatment or physical impact Any one or a plurality of combinations may be used.
- the treatment time with the protease is preferably 0.5 to 36 hours in total to give external stress to the cells.
- the protease concentration may be a concentration used when peeling cells adhered to the culture vessel, separating the cell mass into single cells, or collecting single cells from the tissue.
- the protease is preferably a serine protease, aspartic protease, cysteine protease, metalloprotease, glutamic acid protease or N-terminal threonine protease. Further, the protease is preferably trypsin, collagenase or dispase.
- the Muse cell having the above-described characteristics used in the cell preparation of the present invention accumulates in damaged myocardial tissue (myocardial infarction site) after intravenous administration and differentiates into myocardial cells in the tissue as described later.
- the infarct size can be reduced, and the cardiac function can be improved or restored to normal (Examples 2 to 4).
- the cell preparation of the present invention is not limited, but the Muse cell or the cell population containing Muse cell obtained in (1) above is treated with physiological saline or an appropriate buffer (for example, phosphorous). Acid buffered saline).
- physiological saline or an appropriate buffer for example, phosphorous. Acid buffered saline.
- the cells may be cultured before cell transplantation and grown until a predetermined cell concentration is obtained.
- International Publication No. WO2011 / 007900 pamphlet since Muse cells do not become tumors, even if cells collected from living tissue remain undifferentiated, they may become cancerous. Is low and safe.
- the culture of the collected Muse cells is not particularly limited, but can be performed in a normal growth medium (for example, ⁇ -minimal essential medium ( ⁇ -MEM) containing 10% calf serum).
- a normal growth medium for example, ⁇ -minimal essential medium ( ⁇ -MEM) containing 10% calf serum.
- a medium, additives for example, antibiotics, serum
- Muse cells at a predetermined concentration can be prepared.
- the cell preparation of the present invention When the cell preparation of the present invention is administered to a human myocardial infarction subject, a few ml of bone marrow fluid is collected from the human iliac bone, for example, after separating Muse cells using the SSEA-3 antigen marker as an index, After increasing the cells by culturing for an appropriate time (eg, 2-3 weeks) until an effective therapeutic amount is reached, autologous Muse cells can be prepared as a cell preparation.
- Muse cells when using Muse cells in cell preparations, dimethyl sulfoxide (DMSO), serum albumin, etc. are included in the cell preparations to protect the cells, and antibiotics, etc., are included in the cell preparations to prevent bacterial contamination and growth. May be.
- DMSO dimethyl sulfoxide
- other pharmaceutically acceptable ingredients for example, carriers, excipients, disintegrants, buffers, emulsifiers, suspending agents, soothing agents, stabilizers, preservatives, preservatives, physiological saline, etc.
- Cells or components other than Muse cells contained in mesenchymal stem cells may be contained in the cell preparation.
- Muse cells can also be used as pharmaceutical compositions containing various additives.
- the number of Muse cells contained in the cell preparation prepared above is determined so that the desired effect (for example, reduction in infarct size, improvement in cardiac function) can be obtained in the treatment of myocardial infarction.
- the desired effect for example, reduction in infarct size, improvement in cardiac function
- it can be adjusted appropriately.
- a rabbit myocardial infarction model was created and various effects of Muse cell transplantation were examined.
- Japanese white rabbits of about 2 to 3 kg 5 SSEA3 positive cells were used. By administering at ⁇ 10 5 cells / head, a very excellent effect was obtained.
- the cell preparation of the present invention can be used a plurality of times (for example, 2 to 10 times) at appropriate intervals (for example, twice a day, once a day, once a week) until a desired therapeutic effect is obtained.
- the therapeutically effective dose is preferably, for example, 1 ⁇ 10 3 cells to 1 ⁇ 10 6 cells per individual and 1 to 10 doses.
- the total administration amount in one individual is not limited, but 1 ⁇ 10 3 cells to 1 ⁇ 10 7 , 1 ⁇ 10 4 cells to 5 ⁇ 10 6 cells, 2 ⁇ 10 4 cells to 2 ⁇ 10 6 cells, 5 ⁇ 10 Examples thereof include 4 cells to 1 ⁇ 10 6 cells.
- Muse cells used in the cell preparation of the present invention have the property of accumulating at the myocardial infarction site as described above. Therefore, in administration of a cell preparation, the administration site of the cell preparation and the type of blood vessel (venous and artery) to be administered are not limited. Suitable veins for administration include, but are not limited to, the ear vein and the jugular vein. In the case of humans, the cubital vein is preferred.
- the artery suitable for administration is not limited, but a coronary artery is preferable. However, considering cell transport efficiency, early recovery of the subject after surgery, etc., it is preferable to insert a cardiac catheter percutaneously and directly administer the cell preparation to the coronary artery at the infarcted site.
- the puncture site of the cardiac catheter includes, but is not limited to, the wrist (radial artery), elbow (brachial artery), and groin (femoral artery).
- the cell preparation of the present invention is intended for treatment of myocardial infarction such as severe large myocardial infarction, and the administration period is assumed to be in the range of several hours to several weeks after ischemia. Therefore, the administration time of the cell preparation of the present invention is not limited, but is preferably within one month at the latest after ischemia. More preferably within 14 days, even more preferably within 7 days, even more preferably within 72 hours, still more preferably within 48 hours, even more preferably within 24 hours, even more preferably within 12 hours, most preferably 6 Within hours. According to the present invention, when the time required for reperfusion is very long, or when reperfusion and catheter therapy are unsuccessful, it can be treated, so it is very useful for the treatment of myocardial infarction.
- the number of administrations is not particularly limited, and is desired in the treatment of myocardial infarction. It may be appropriately administered until an effect is obtained.
- the infarct size can be reduced in the subject of myocardial infarction by administering the cell preparation of the present invention.
- infarct size is defined as the ratio (%) of the infarct region to the ischemic region.
- the ischemic region is determined using the Evans blue staining method, and the non-ischemic region is stained with this dye.
- the infarct area was determined using the triphenyltetrazolium chloride (TTC) staining method.
- TTC triphenyltetrazolium chloride
- the reduction ratio relative to the control infarct size ie, (control infarct size ⁇ infarction size after cell transplantation) / control infarct size ⁇ 100
- the infarct size is preferably reduced by 100% with respect to the non-administered group (control) of the cell preparation. More preferably, the reduction is 10 to 90%, even more preferably 20 to 70%, and still more preferably 30 to 50%.
- the cell preparation of the present invention can improve or restore normal (or normal value) cardiac function after myocardial infarction.
- “improving” cardiac function means alleviation of various symptoms associated with myocardial infarction and suppression of progression, preferably alleviating symptoms to such an extent that they do not interfere with daily life. Means.
- “normally recovering” cardiac function means that all symptoms resulting from myocardial infarction return to the state prior to myocardial infarction.
- the cell preparation of the present invention can be used for the prevention and / or treatment of (chronic) heart failure after myocardial infarction.
- the index for evaluating the myocardial function is not limited, but generally, changes in blood pressure over time in the left ventricle ( ⁇ dp / dt; p: blood pressure, t: time), left ventricular end-diastolic diameter (Left Ventricular end-Diistic dimension; LVDd), ejection fraction (EF), left ventricular diameter shortening rate (Fractional Shortening; FS), and left ventricular end-systolic diameter (Left VentricularSensitiveL; Can be mentioned.
- the improvement or recovery of cardiac function by the cell preparation of the present invention can be determined using at least one of the above five indicators.
- the ejection fraction (EF) which is one of the indices of cardiac contraction function
- EF ejection fraction
- Example 1 Preparation of Rabbit Myocardial Infarction Model
- the experimental protocol using rabbits in this example was approved by the Ethics Committee on Animal Experiments at Gifu University and was published by the National Institutes of Health (NIH). Furthermore, the “Guidelines for the management and use of experimental animals” (revised 1996) was carried out. Specifically, it is as follows. First, Japanese white rabbits (about 2-3 kg / animal) were anesthetized with 30 mg / kg sodium pentobarbital. In rabbits, arterial gas analysis was performed continuously and ventilation conditions were adjusted as appropriate to maintain arterial gas in the physiological range. The left carotid artery and jugular vein were cannulated and arterial pressure was monitored.
- Example 2 Effect of reducing myocardial infarct size by Muse cell transplantation (1) Preparation of Muse cells Bone marrow cells were collected from rabbits (about 2 to 3 kg / mouse), and SSEA-3-positive cells (Muse cells) were used using FACS. Separated. More specifically, it was carried out according to the method described in International Publication No. WO2011 / 007900 pamphlet concerning the separation and identification of human Muse cells. The Muse cells used for transplantation are derived from bone marrow cells of rabbits who have developed myocardial infarction. After culturing mesenchymal cells having adhesion from the bone marrow and proliferating, lentivirus -GFP was introduced into the cells.
- GFP-labeled Muse cells or cell populations containing Muse cells were separated by FACS as double positive cells of GFP and SSEA-3. Then, it adjusted to the predetermined density
- SSEA-3 All positive cells are known to be CD105 positive cells.
- rabbits 14 days after reperfusion were treated with heparin (500 U / kg) and euthanized by intravenous injection of an excess amount of pentobarbital.
- the heart was removed, and the infarct region in the myocardial tissue was determined by triphenyltetrazolium chloride (TTC) staining method. The unstained area is the infarcted area.
- TTC triphenyltetrazolium chloride
- Evans Blue dye 4%; Sigma Chemical, St. Louis, MO
- the left ventricle was cut so that an atrioventricular ring was obtained, and a total of seven tissue sections were obtained. Each tissue was weighed and then incubated in 1% TTC solution at 37 ° C., then the infarct area was visualized and imaged (see Fishbein et al., Am. Heart J., 101, 593-600, 1981). The results are shown in FIG. In the figure, the left panel shows the atrioventricular ring to which physiological saline was administered as a control, and the right panel shows the atrioventricular ring to which Muse cell transplantation was performed.
- tissue sections a region surrounded by a white broken line (a part of the myocardium and papillary muscle) represents an infarct site that was not stained by TTC.
- the infarct site was observed as in the control, but it can be seen that the area was very narrow compared to the control.
- the infarct size was calculated as a ratio (%) of the infarct area to the ischemic area (FIG. 2).
- This effect was calculated as the reduction rate, Muse cells were able to reduce the infarct size by about 40%.
- the same test was performed by increasing the number of subjects (FIG. 8).
- the infarct size reduction effect was examined histochemically by Masson trichrome staining.
- the excised heart was fixed in 10% formalin solution, and after embedding in paraffin, sections were prepared from each specimen in the cross-sectional direction so that an atrioventricular ring was obtained. Thereafter, Masson trichrome (MT) staining was performed according to a conventional method to visualize the myocardial infarction region (FIGS. 3 and 9).
- MT staining a tissue composed of living cells is stained red, while a collagen fibrosis tissue is pale and observed as if the color has been lost.
- collagen fibrotic tissue infarct site
- the left ventricular tissue of the group of rabbits transplanted with Muse cells the pale part is smaller than the control, indicating that the infarct size has decreased. Characteristically, papillary muscles were also observed to recover from infarction.
- the left ventricular tissue in rabbits transplanted with MSC cells showed a decrease in infarct size when compared with the control administered with saline, but compared with the Muse cell transplanted group, The size reduction effect was small. Also, the papillary muscle recovery observed in Muse cell transplantation was not seen in tissues transplanted with MSC cells.
- Example 3 Differentiation of Muse cells in heart tissue It was examined whether the decrease in infarct size caused by Muse cells observed in Example 2 was due to differentiation of cardiomyocytes by Muse cells.
- Muse cells (5 ⁇ 10 5 cells) transfected with green fluorescent protein (GFP) were injected from the ear vein of a rabbit myocardial infarction model.
- GFP green fluorescent protein
- tissue sections were prepared, and the tissues were observed using various fluorescent dyes for tissue staining (FIG. 4). As can be seen in the left panel of FIG. 4, the white broken line indicates the boundary between the infarcted portion and the non-infarcted portion, and the upper right portion indicates the infarcted portion and the lower left portion indicates the non-infarcted portion.
- the middle panel is a stained red cardiomyocyte by rhodamine phalloidin staining according to a conventional method. By this staining, an infarcted site and a non-infarcted site can be clearly distinguished.
- the right panel shows a GFP-stained image and shows that Muse cells into which the GFP gene has been introduced (green) are selectively accumulated at the infarct site. An image obtained by superimposing these two images is shown on the left panel. Thereby, there are many cells in which red and green overlap at the infarct site, suggesting that the transplanted Muse cells have differentiated into cardiomyocytes.
- GFP-positive Muse cells were examined for the presence or absence of expression of atrial natriuretic peptide (ANP) according to a conventional method.
- ANP atrial natriuretic peptide
- FIG. 5 green (Muse cells) indicates GFP staining, red indicates ANP staining, and blue indicates DAPI staining (stains cell nuclei).
- the transplanted Muse cells include cells that are differentiating into cardiomyocytes. Was suggested.
- troponin I which is known as a myocardial marker
- mouse anti-human troponin I antibody (Chemical International, Inc) that cross-reacts with rabbit troponin I was used as the primary antibody.
- green (Muse cells) indicates GFP staining
- red indicates troponin I staining
- blue indicates DAPI staining (stains cell nuclei).
- Example 4 Evaluation of cardiac function improvement by Muse cell transplantation Cardiac function after Muse cell transplantation was examined using blood pressure change with time ( ⁇ dp / dt; p is blood pressure, t is time) as an index, and Judgment was made from left ventricular cross-sectional images by 2D echocardiography.
- the blood pressure change over time was measured by anesthetizing each rabbit 14 days after reperfusion with 10 mg / kg pentobarbital, and inserting a catheter with a micromanometer (SPR 407; Millar Instruments) into the left ventricle from the carotid artery of the rabbit.
- the + dp / dt representing the left ventricular systolic function obtained by this catheter and -dp / dt representing the left ventricular diastole function were recorded.
- the result is shown in FIG.
- the rabbit group transplanted with Muse cells showed a higher cardiac function than the control group. Significantly improved.
- FIG. 11 shows the results of examining the cardiac function with the change in blood pressure over time as an index in the same manner as described above, further increasing the number of subjects.
- the cardiac function was significantly improved.
- 2D echocardiography was performed to further confirm the cardiac function of the rabbits (control group and Muse cell transplant group).
- a rabbit heart was imaged using an ultrasonic diagnostic apparatus for animals (SSD2000; Aloka).
- An image of the left ventricular parasternal left ventricular long-axis cross section obtained by the measurement is shown in FIG.
- the left panel is the left ventricle of the control rabbit and the right panel is the left ventricle of the rabbit transplanted with Muse cells.
- the left ventricular end-diastolic dimension (LVDd) was 22.2 mm.
- the rabbit transplanted with Muse cells is as small as 19.5 mm, it can be seen that the infarct size was reduced by Muse cells.
- EF ejection fraction
- FS fractional shortening
- This left ventricular diameter shortening rate is obtained by measuring the left ventricular end-diastolic diameter and the left ventricular end-systolic diameter using an M-mode echo chart obtained by imaging, and dividing these differences by the left ventricular end-diastolic diameter. It is expressed as a fraction. Usually, the normal value in humans is 30 to 50%. Therefore, the above measurement results suggest that cardiac function was restored to normal by Muse cell transplantation in rabbits compared to controls.
- LVDd, EF, and LB for control rabbits, rabbits transplanted with MSC cells, and rabbits transplanted with non-Muse cells to confirm that the heart function of the rabbits after transplantation of Muse cells returned to normal.
- FS described above
- LPDs left ventricular end-systolic dimension
- the heart function of rabbits was restored to normal by Muse cell transplantation for all LVDd, EF and FS.
- LVDs were 18.3 mm on average in the control rabbits, but 13.8 mm on average in the rabbits transplanted with Muse cells, so that cardiac function was improved by Muse cell transplantation. Suggests normal recovery.
- the myocardium When the cell preparation of the present invention is intravenously administered to a myocardial infarction model, the myocardium can be regenerated at the infarct site, the infarct size can be reduced, and cardiac function can be improved. It can be applied to the treatment of human severe large myocardial infarction and accompanying heart failure.
Abstract
Description
[1]生体の間葉系組織又は培養間葉系細胞から分離されたSSEA-3陽性の多能性幹細胞を含む、心筋梗塞を治療するための細胞製剤。
[2]外的ストレス刺激によりSSEA-3陽性の多能性幹細胞が、濃縮された細胞画分を含む、[1]に記載の細胞製剤。
[3]ヒトの重症大型心筋梗塞後の心不全を予防及び/又は治療するための、上記[1]及び[2]に記載の細胞製剤。
[4]前記多能性幹細胞が、CD105陽性である、上記[1]~[3]に記載の細胞製剤。
[5]前記多能性幹細胞が、CD117陰性及びCD146陰性である、上記[1]~[4]に記載の細胞製剤。
[6]前記多能性幹細胞が、CD117陰性、CD146陰性、NG2陰性、CD34陰性、vWF陰性、及びCD271陰性である、上記[1]~[5]に記載の細胞製剤。
[7]前記多能性幹細胞が、CD34陰性、CD117陰性、CD146陰性、CD271陰性、NG2陰性、vWF陰性、Sox10陰性、Snai1陰性、Slug陰性、Tyrp1陰性、及びDct陰性である、上記[1]~[6]に記載の細胞製剤。
[8]前記多能性幹細胞が、以下の性質の全てを有する多能性幹細胞である、上記[1]~[7]に記載の細胞製剤:
(i)テロメラーゼ活性が低いか又は無い;
(ii)三胚葉のいずれの胚葉の細胞に分化する能力を持つ;
(iii)腫瘍性増殖を示さない;及び
(iv)セルフリニューアル能を持つ。
[9]前記多能性幹細胞が、心筋梗塞部位に集積する能力を有する、上記[1]~[8]に記載の細胞製剤。
[10]前記多能性幹細胞が、血管内皮細胞に分化する能力を有する、上記[1]~[9]に記載の細胞製剤。
[11]前記多能性幹細胞が、心筋細胞に分化する能力を有する、上記[1]~[9]に記載の細胞製剤。
[12]虚血後1カ月以内に対象の静脈又は冠動脈に前記多能性幹細胞を治療上有効量として1×103細胞/個体~1×106細胞/個体で1~10回投与する、上記[1]~[11]に記載の細胞製剤。
[13]非投与対照と比較して、心筋梗塞サイズを縮小させる、上記[1]~[12]に記載の細胞製剤。
[14]左室における経時的な血圧変化、左室拡張末期径(LVDd)、駆出率(EF)、左室内径短縮率(FS)、及び左室収縮末期径(LVDs)からなる群から選択される少なくとも1つの心機能指標を正常値に回復させる、上記[1]~[13]に記載の細胞製剤。
本発明は、SSEA-3陽性の多能性幹細胞(Muse細胞)を含む細胞製剤を用いて、心筋梗塞、特に、重症大型心筋梗塞、及びそれに伴う心不全の治療を目指す。ここで、「心筋梗塞」とは、冠動脈の閉塞によってもたらされる心筋壊死をいう。また、「心不全」とは、十分量の血流を押し出す心機能の不全に原因する症候群をいい、心拍出量の低下とそれに伴う静脈圧の増大、またその結果として生じる種々の臨床症状が含まれる。心筋梗塞は、急性心臓死及び慢性心臓死を引き起こす原因となる。特に、急性心筋梗塞の場合、死亡率は35~50%と高く、その死亡例の60~70%は発症後1~2時間以内の死亡である。また、急性期を無事に過ぎても、初回発作の心筋壊死巣が大きい場合には、心筋梗塞を再発する危険性が高い。したがって、心筋梗塞の治療においては、発作が起きたときに迅速に処置することが求められ、壊死した心筋の大きさ、すなわち梗塞サイズを可及的小にとどめることが重要とされている。また、心筋梗塞の重症度判定には、種々の分類がある。そのような分類としては、例えば、時間的経過による分類、形態学的分類(心筋層内範囲、部位、壊死の大きさなど)、心筋の壊死形態、梗塞後の心室再構築、血行動態的分類(治療、予後などに関連する)、臨床的重症度による分類などが挙げられる。ここで、重症度が高く、より広範囲に心筋壊死に陥った心筋梗塞を特に「重症大型心筋梗塞」という。例えば、左冠動脈の近位部の完全閉塞が挙げられる。また、重症大型心筋梗塞では、心筋の左室リモデリングが進行し、心不全に陥るため生命予後は悪いことが知られている。ここで、心筋梗塞後の「左室リモデリング」とは、心筋梗塞後に生じる梗塞部位の非薄化による心機能低下の代償として起こる非梗塞部位の心筋細胞の肥大、間質(細胞外マトリックス)の増加、心内腔の拡大などの一連の変化を指す。心筋梗塞後の長期予後は、左室機能不全の程度と相関するため、左室リモデリングを抑制することは左室の機能を維持及び保存するために不可欠である。
(1)多能性幹細胞(Muse細胞)
本発明の細胞製剤に使用される多能性幹細胞は、本発明者らの一人である出澤氏が、ヒト生体内にその存在を見出し、「Muse(Multilineage-differentiating Stress Enduring)細胞」と命名した細胞である。Muse細胞は、骨髄液や真皮結合組織等の皮膚組織から得ることができ、各臓器の結合組織にも散在する。また、この細胞は、多能性幹細胞と間葉系幹細胞の両方の性質を有する細胞であり、例えば、それぞれの細胞表面マーカーである「SSEA-3(Stage-specific embryonic antigen-3)」と「CD105」のダブル陽性として同定される。したがって、Muse細胞又はMuse細胞を含む細胞集団は、例えば、これらの抗原マーカーを指標として生体組織から分離することができる。また、Muse細胞はストレス耐性であり、間葉系組織又は培養間葉系細胞から種々のストレス刺激により濃縮することができる。本発明の細胞製剤には、ストレス刺激によりMuse細胞が濃縮された細胞画分を用いることもできる。Muse細胞の分離法、同定法、濃縮法、及び特徴などの詳細は、国際公開第WO2011/007900号に開示されている。また、Wakaoら(2011、上述)によって報告されているように、骨髄、皮膚などの間葉系細胞を培養して得たものをMuse細胞の母集団として用いる場合、SSEA-3陽性細胞の全てがCD105陽性細胞であることが分かっている。したがって、本発明における細胞製剤においては、生体の間葉系組織又は培養間葉系細胞からMuse細胞を分離する場合は、単にSSEA-3を抗原マーカーとしてMuse細胞を精製し、使用することができる。なお、本明細書においては、心筋梗塞を治療するための細胞製剤において使用され得る、SSEA-3を抗原マーカーとして、生体の間葉系組織又は培養間葉系組織から分離された多能性幹細胞(Muse細胞)又はMuse細胞を含む細胞集団を単に「SSEA-3陽性細胞」と記載することがある。
(i)テロメラーゼ活性が低いか又は無い;
(ii)三胚葉のいずれの胚葉の細胞に分化する能力を持つ;
(iii)腫瘍性増殖を示さない;及び
(iv)セルフリニューアル能を持つ
からなる群から選択される少なくとも1つの性質を有してもよい。本発明の一局面では、本発明の細胞製剤に使用されるMuse細胞は、上記性質を全て有する。ここで、上記(i)について、「テロメラーゼ活性が低いか又は無い」とは、例えば、TRAPEZE XL telomerase detection kit(Millipore社)を用いてテロメラーゼ活性を検出した場合に、低いか又は検出できないことをいう。テロメラーゼ活性が「低い」とは、例えば、ヒト線維芽細胞と同程度のテロメラーゼ活性を有しているか、又はHela細胞に比べて1/5以下、好ましくは1/10以下のテロメラーゼ活性を有していることをいう。上記(ii)について、Muse細胞は、in vitro及びin vivoにおいて、三胚葉(内胚葉系、中胚葉系、及び外胚葉系)に分化する能力を有し、例えば、in vitroで誘導培養することにより、皮膚、肝、神経、筋、骨、脂肪等に分化し得る。また、in vivoで精巣に移植した場合にも三胚葉に分化する能力を示す場合がある。さらに、静注により生体に移植することで損傷を受けた臓器(心臓、皮膚、脊髄、肝、筋肉等)に遊走及び生着し、分化する能力を有する。上記(iii)について、Muse細胞は、浮遊培養で増殖速度約1.3日で増殖するが、10日間程度で増殖が止まるという性質を有し、さらに精巣に移植した場合、少なくとも半年間は癌化しないという性質を有する。また、上記(iv)について、Muse細胞は、セルフリニューアル(自己複製)能を有する。ここで、「セルフリニューアル」とは、Muse細胞を浮遊培養することにより得られる胚様体様細胞塊に含まれる細胞を培養し、再度胚様体様細胞塊を形成させることをいう。セルフリニューアルは1回又は複数回のサイクルを繰り返せばよい。
(i)SSEA-3陽性;
(ii)CD105陽性;
(iii)テロメラーゼ活性が低いか又は無い;
(iv)三胚葉に分化する能力を持つ;
(v)腫瘍性増殖を示さない;及び
(vi)セルフリニューアル能を持つ。
本発明の細胞製剤は、限定されないが、上記(1)で得られたMuse細胞又はMuse細胞を含む細胞集団を生理食塩水や適切な緩衝液(例えば、リン酸緩衝生理食塩水)に懸濁させることによって得られる。この場合、自家又は他家の組織から分離したMuse細胞数が少ない場合には、細胞移植前に細胞を培養して、所定の細胞濃度が得られるまで増殖させてもよい。なお、すでに報告されているように(国際公開第WO2011/007900号パンフレット)、Muse細胞は、腫瘍化しないため、生体組織から回収した細胞が未分化のまま含まれていても癌化の可能性が低く安全である。また、回収したMuse細胞の培養は、特に限定されないが、通常の増殖培地(例えば、10%仔牛血清を含むα-最少必須培地(α-MEM))において行うことができる。より詳しくは、上記国際公開第WO2011/007900号パンフレットを参照して、Muse細胞の培養及び増殖において、適宜、培地、添加物(例えば、抗生物質、血清)等を選択し、所定濃度のMuse細胞を含む溶液を調製することができる。ヒトの心筋梗塞対象に本発明の細胞製剤を投与する場合には、ヒトの腸骨から数ml程度の骨髄液を採取し、例えば、Muse細胞をSSEA-3の抗原マーカーを指標として分離後、有効な治療量に達するまで細胞を適切な時間(例えば、2~3週間)培養して増やした後、自家のMuse細胞を細胞製剤として調製することができる。
本実施例におけるウサギを用いた実験プロトコールは、岐阜大学の動物実験に関する倫理委員会によって承認されたものであり、米国国立衛生研究所(NIH)によって刊行された「実験動物の管理と使用に関する指針」(1996年改定版)に沿って実施された。具体的には、以下の通りである。まず、日本白色種ウサギ(約2~3kg/匹)は、30mg/kgペントバルビタールナトリウムを用いて麻酔された。ウサギにおいて、連続的に動脈ガス分析を行い、動脈ガスを生理学的範囲に維持するように換気条件を適宜調整した。左頸動脈及び頸静脈にカニュレートし、動脈圧を監視した。3番目の肋間腔において左開胸後、心臓を露出させ、左室の外側前面の中央を下行する大冠動脈枝下で4-0絹糸結紮を行った。縫合糸の両末端に細いビニルチューブを通し、その縫合糸を引くことによって冠動脈枝を閉塞した。次に、モスキート止血鉗子を用いてこのチューブをクランプすることによって固定した。心筋虚血は、局所的チアノーゼ及び心電図の変化によって確認した。閉塞(虚血)時間は適宜調整される。縫合糸を開放後、危険領域全体での心筋の赤色への変化によって確認した(Yasudaら,Am.J.Physiol.Heart.Circ.Physiol.,296:H1558-1565,2009wo参照されたい)。
(1)Muse細胞の調製
ウサギ(約2~3kg/匹)から骨髄細胞を回収し、SSEA-3陽性細胞(Muse細胞)をFACSを用いて分離した。より具体的には、ヒトMuse細胞の分離及び同定に関する国際公開第WO2011/007900号パンフレットに記載された方法に準じて行った。なお、移植に使用されるMuse細胞は、心筋梗塞を発症させたウサギの個体の骨髄細胞に由来するものであり、骨髄から接着性を有する間葉系細胞を培養し、増殖を経て、レンチウイルス-GFPを細胞に導入した。GFPで標識されたMuse細胞又はMuse細胞を含む細胞集団をGFPとSSEA-3の二重の陽性細胞としてFACSにて分離した。その後、所定濃度に調整し、静脈注射により心筋梗塞の同一個体のウサギに戻された。なお、上記のように、骨髄細胞などの間葉系細胞を培養して得たものをMuse細胞の母集団として用いる場合、Wakaoら(2011、上述)によって報告されているように、SSEA-3陽性細胞は全て、CD105陽性細胞であることが分かっている。
ウサギにおいて、結紮による梗塞(虚血)時間を30分間(ヒトにおいては虚血3時間に対応する)とし、その後、縫合糸を開放し、再還流を開始した。再還流24時間後に、上記(1)で得た後の生理食塩水で濃度調整されたSSEA-3陽性細胞(5×105細胞)をウサギの耳静脈に投与した。また、比較対照として、骨髄間葉系細胞画分(MSC)(5×105細胞)、及び生理食塩水をそれぞれ別のウサギに投与し、再灌流させた。再還流14日後にMuse細胞による梗塞サイズの縮小効果を比較検討した。
実施例2において観察されたMuse細胞による梗塞サイズの減少が、Muse細胞による心筋細胞への分化によるものかどうかを検討した。まず、緑色蛍光タンパク質(GFP)を発現するように遺伝子導入されたMuse細胞(5×105個)をウサギ心筋梗塞モデルの耳静脈から注射した。実施例2と同様にして、組織切片を作製し、各種組織染色用の蛍光色素を用いて組織を観察した(図4)。図4の左パネルに見られるように、白色の破線は梗塞部と非梗塞部との境界を示し、それより右上部分は梗塞部位、左下部分は非梗塞部位を示す。中央パネルは、常法に従って、ローダミン・ファロイジン染色により生きた心筋細胞を赤色に染色したものである。この染色により、梗塞部位と非梗塞部位を明確に区別することができる。また、右パネルは、GFP染色画像を示し、GFP遺伝子が導入されたMuse細胞(緑色)が梗塞部位に選択的に集積している様子を示す。これら2つの画像を重ね合わせた画像を左パネル示す。これにより、梗塞部位において赤色及び緑色が重なり合う細胞が多数存在し、これは、移植されたMuse細胞が心筋細胞に分化したことを示唆する。
Muse細胞移植後の心機能を経時的な血圧変化(±dp/dt;pは血圧、tは時間を示す)を指標として検討し、さらに、2D心エコー検査によって左室断面の画像から判断した。これらの実験では、再灌流24時間後に、生理食塩水を投与されたウサギ(対照群)(n=3)、及びMuse細胞を投与されたウサギ群(n=4)を用いた。まず、経時的な血圧変化の測定は、再灌流14日後の各ウサギを10mg/kgペントバルビタールで浅麻酔し、ウサギの頸動脈からマイクロマノメーター付きカテーテル(SPR 407;Millar Instruments)を左室に挿入して行われた。このカテーテルにより得られる左室の心臓収縮機能を表す+dp/dt、及び左室の心臓拡張機能を表す-dp/dtを記録した。この結果を図6に示す。心臓収縮機能(+dp/dt)(図6上)、心臓拡張機能(-dp/dt)(図6下)ともに、Muse細胞を移植されたウサギ群は、対照群と比較して、心機能が有意に改善された。
Claims (14)
- 生体の間葉系組織又は培養間葉系細胞から分離されたSSEA-3陽性の多能性幹細胞を含む、心筋梗塞を治療するための細胞製剤。
- 外部ストレス刺激によりSSEA-3陽性の多能性幹細胞が、濃縮された細胞画分を含む、請求項1に記載の細胞製剤。
- ヒトの重症大型心筋梗塞後の心不全を予防及び/又は治療するための、請求項1又は2に記載の細胞製剤。
- 前記多能性幹細胞が、CD105陽性である、請求項1~3のいずれか1項に記載の細胞製剤。
- 前記多能性幹細胞が、CD117陰性及びCD146陰性である、請求項1~4のいずれか1項に記載の細胞製剤。
- 前記多能性幹細胞が、CD117陰性、CD146陰性、NG2陰性、CD34陰性、vWF陰性、及びCD271陰性である、請求項1~5のいずれか1項に記載の細胞製剤。
- 前記多能性幹細胞が、CD34陰性、CD117陰性、CD146陰性、CD271陰性、NG2陰性、vWF陰性、Sox10陰性、Snai1陰性、Slug陰性、Tyrp1陰性、及びDct陰性である、請求項1~6のいずれか1項に記載の細胞製剤。
- 前記多能性幹細胞が、以下の性質の全てを有する多能性幹細胞である、請求項1~7のいずれか1項に記載の細胞製剤:
(i)テロメラーゼ活性が低いか又は無い;
(ii)三胚葉のいずれの胚葉の細胞に分化する能力を持つ;
(iii)腫瘍性増殖を示さない;及び
(iv)セルフリニューアル能を持つ。 - 前記多能性幹細胞が、心筋梗塞部位に集積する能力を有する、請求項1~8のいずれか1項に記載の細胞製剤。
- 前記多能性幹細胞が、心筋細胞に分化する能力を有する、請求項1~9のいずれか1項に記載の細胞製剤。
- 前記多能性幹細胞が、血管内皮細胞に分化する能力を有する、請求項1~9のいずれか1項に記載の細胞製剤。
- 虚血後1カ月以内に対象の静脈又は冠動脈に前記多能性幹細胞を治療上有効量として1×103細胞/個体~1×106細胞/個体で1~10回投与する、請求項1~11のいずれか1項に記載の細胞製剤。
- 非投与対照と比較して、心筋梗塞サイズを縮小させる、請求項1~12のいずれか1項に記載の細胞製剤。
- 左室における経時的な血圧変化、左室拡張末期径(LVDd)、駆出率(EF)、左室内径短縮率(FS)、及び左室収縮末期径(LVDs)からなる群から選択される少なくとも1つの心機能指標を正常値に回復させる、請求項1~13のいずれか1項に記載の細胞製剤。
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CA2882239A CA2882239C (en) | 2012-08-17 | 2013-08-15 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction |
CN201380043649.5A CN104582711B (zh) | 2012-08-17 | 2013-08-15 | 诱导心肌梗塞的修复再生的多能性干细胞 |
AU2013303492A AU2013303492B2 (en) | 2012-08-17 | 2013-08-15 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction |
DK13879518.2T DK2886123T3 (da) | 2012-08-17 | 2013-08-15 | Pluripotent stamcelle som inducerer reparation og regeneration efter myokardieinfarkt |
IN1616DEN2015 IN2015DN01616A (ja) | 2012-08-17 | 2013-08-15 | |
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JP2014530568A JP5968442B2 (ja) | 2012-08-17 | 2013-08-15 | 心筋梗塞の修復再生を誘導する多能性幹細胞 |
US14/421,754 US9844570B2 (en) | 2012-08-17 | 2013-08-15 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction |
ES13879518T ES2767182T3 (es) | 2012-08-17 | 2013-08-15 | Células madre pluripotentes que inducen reparación y regeneración después de un infarto de miocardio |
SG11201501185WA SG11201501185WA (en) | 2012-08-17 | 2013-08-15 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction |
PL13879518T PL2886123T3 (pl) | 2012-08-17 | 2013-08-15 | Pluripotencjalna komórka macierzysta indukująca naprawę i regenerację po zawale mięśnia sercowego |
KR1020157006629A KR101730052B1 (ko) | 2012-08-17 | 2013-08-15 | 심근경색의 수복 재생을 유도하는 다능성 간세포 |
EP19202650.8A EP3659612B1 (en) | 2012-08-17 | 2013-08-15 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction technical field |
US15/802,899 US10376544B2 (en) | 2012-08-17 | 2017-11-03 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction |
US16/452,376 US10639335B2 (en) | 2012-08-17 | 2019-06-25 | Pluripotent stem cell that induces repair and regeneration after myocardial infarction |
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KR101730052B1 (ko) | 2017-04-25 |
US20180050067A1 (en) | 2018-02-22 |
US20150196600A1 (en) | 2015-07-16 |
SG10201800829XA (en) | 2018-03-28 |
US20190307806A1 (en) | 2019-10-10 |
CN104582711A (zh) | 2015-04-29 |
EP2886123B1 (en) | 2019-10-23 |
DK2886123T3 (da) | 2020-01-27 |
KR20150043482A (ko) | 2015-04-22 |
US9844570B2 (en) | 2017-12-19 |
US10639335B2 (en) | 2020-05-05 |
SG11201501185WA (en) | 2015-05-28 |
EP3659612B1 (en) | 2023-06-07 |
AU2013303492A1 (en) | 2015-03-12 |
CA2882239A1 (en) | 2014-02-20 |
ES2767182T3 (es) | 2020-06-16 |
PT2886123T (pt) | 2020-01-22 |
JP5968442B2 (ja) | 2016-08-10 |
PL2886123T3 (pl) | 2020-05-18 |
WO2014027474A1 (ja) | 2014-02-20 |
EP3659612A1 (en) | 2020-06-03 |
AU2013303492B2 (en) | 2017-02-16 |
IN2015DN01616A (ja) | 2015-07-03 |
JPWO2014027684A1 (ja) | 2016-07-28 |
US10376544B2 (en) | 2019-08-13 |
EP2886123A4 (en) | 2016-06-22 |
CA2882239C (en) | 2018-05-22 |
CN104582711B (zh) | 2019-12-06 |
EP2886123A1 (en) | 2015-06-24 |
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