WO2012036383A2 - 중간엽 줄기세포의 심장성 세포로의 분화 유도를 위한 단백질 티로신 키나아제 저해제의 용도 - Google Patents
중간엽 줄기세포의 심장성 세포로의 분화 유도를 위한 단백질 티로신 키나아제 저해제의 용도 Download PDFInfo
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- WO2012036383A2 WO2012036383A2 PCT/KR2011/006020 KR2011006020W WO2012036383A2 WO 2012036383 A2 WO2012036383 A2 WO 2012036383A2 KR 2011006020 W KR2011006020 W KR 2011006020W WO 2012036383 A2 WO2012036383 A2 WO 2012036383A2
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- mesenchymal stem
- stem cells
- cells
- cardiac
- alkoxy
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
- A61K31/517—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with carbocyclic ring systems, e.g. quinazoline, perimidine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- 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
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
- C12N5/0657—Cardiomyocytes; Heart cells
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/70—Enzymes
- C12N2501/72—Transferases [EC 2.]
- C12N2501/727—Kinases (EC 2.7.)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2506/00—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells
- C12N2506/13—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells from connective tissue cells, from mesenchymal cells
- C12N2506/1346—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells from connective tissue cells, from mesenchymal cells from mesenchymal stem cells
Definitions
- the present invention relates to the use of a PTK inhibitor for inducing differentiation of mesenchymal stem cells into cardiac cells, and to a pharmaceutical composition for treating heart disease comprising cardiac cells differentiated from mesenchymal stem cells by PTK inhibitors.
- the present invention differentiates mesenchymal stem cells into mesenchymal cells, which can achieve electromechanical integration with cardiac muscle after transplantation from mesenchymal stem cells for use as cell therapy for myocardial infarction, heart failure, arrhythmia, etc. To provide a method of deriving.
- mesenchymal stem cells for cardiac characterization before delivery of mesenchymal stem cells to the infarcted heart, which may result in improved contractile function and electrical safety.
- PTK protein tyrosine kinase
- the present invention provides a method for inducing differentiation of mesenchymal stem cells into cardiac cells, including the use of a PTK inhibitor for inducing differentiation of mesenchymal stem cells into cardiac cells, and treating the mesenchymal stem cells with a PTK inhibitor. And it provides a composition for inducing differentiation of mesenchymal stem cells into cardiac cells comprising a PTK inhibitor.
- the type of PTK inhibitor used for inducing differentiation of mesenchymal stem cells into cardiac cells is not particularly limited.
- the PTK inhibitor can be a compound of Formula 1.
- R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently H, C 1-12 alkyl, C 1-12 alkoxy, hydroxy, carboxy or halogen atom,
- R 7 is C 6-12 aryl unsubstituted or substituted with one or more substituents selected from the group consisting of C 1-12 alkyl, C 1-12 alkoxy, hydroxy, carboxy and halogen atoms.
- a "substituted" group is where one or more hydrogen atoms have been replaced by one or more non-hydrogen atom groups, provided that the valence requirements are met and chemically stable compounds must be generated from the substitution.
- all substituents are to be interpreted as being optionally substituted, unless expressly stated to be “unsubstituted.”
- the substituents of R 1 to R 6 may each be substituted with one or more of the substituents defined above.
- Alkyl generally refers to straight-chain and branched saturated hydrocarbon groups having the specified number of carbon atoms (eg, 1 to 12 carbon atoms).
- alkyl groups include, without limitation, methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, i-butyl, t-butyl, pent-1-yl, pent-2-yl, pent-3- 1, 3-methylbut-1-yl, 3-methylbut-2-yl, 2-methylbut-2-yl, 2,2,2-trimethyleth-1-yl, n-hexyl, n-heptyl and n-octyl and the like.
- Alkoxy refers to alkyl-O-, wherein alkyl is defined above.
- alkoxy groups include without limitation methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, s-butoxy, t-butoxy, n-pentoxy, s-pentoxy and the like. do.
- Alkoxy may be attached to a parent group or substrate at any ring atom if the attachment does not violate valence requirements.
- an alkoxy group may include one or more non-hydrogen substituents unless the attachment would violate valence requirements.
- Carboxy refers to -C (O) OH, a divalent radical.
- (O) means that oxygen is bonded to a atom such as carbon or sulfur through a double bond.
- Aryl refers to monovalent and divalent aromatic groups, respectively, including 5- and 6-membered monocyclic aromatic groups containing 0-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur. When aryl contains one or more heteroatoms, it is also referred to as "heteroaryl”.
- Examples of monocyclic aryl groups include, but are not limited to, phenyl, pyrrolyl, furanyl, thiophenyl, thiazolyl, isothiazolyl, imidazolyl, triazolyl, tetrazolyl, pyrazolyl, oxazolyl, isoxazolyl, pyridinyl , Pyrazinyl, pyridazinyl, pyrimidinyl and the like.
- Aryl groups also include bicyclic groups, tricyclic groups, etc., including fused 5- and 6-membered rings as defined above.
- polycyclic aryl groups include without limitation naphthyl, bifenyl, anthracenyl, pyrenyl, carbazolyl, benzoxazolyl, benzodioxazolyl, benzothiazolyl, benzoimidazolyl, benzothiopheneyl, quinolinyl , Isoquinolinyl, indolyl, benzofuranyl, furinyl, indolizinyl and the like.
- the aryl group can be attached to the parent group or substrate at any ring atom as long as the attachment does not violate valence requirements.
- an aryl group may include one or more non-hydrogen substituents if the substitution does not violate valence requirements.
- R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently H, C 1-4 alkyl or C 1-4 alkoxy,
- R 7 may be phenyl unsubstituted or substituted with one or more substituents selected from the group consisting of C 1-4 alkyl, C 1-4 alkoxy, hydroxy, carboxy and halogen atoms.
- R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently H or C 1-4 alkoxy
- R 7 may be C 1-4 alkyl, C 1-4 alkoxy, or phenyl unsubstituted or substituted with a halogen atom.
- the PTK inhibitor can be N- (3-bromophenyl) -6,7-diethoxyquinazolin-4-amine.
- mesenchymal stem cells used for inducing differentiation into cardiac cells in the present invention is also not particularly limited.
- Mesodermal stem cells used in the present invention can be used regardless of where they are derived from.
- Mesenchymal stem cells can be obtained from known mesenchymal stem cell sources, for example bone marrow, tissue, embryo, umbilical cord blood, blood or body fluids. Animals to be harvested, such as bone marrow and tissue may be mammals. When the animal is a human, bone marrow, tissue, or the like may be from the patient's own or another person to be administered as a cell therapy the mesoderm stem cells induced differentiation into cardiac cells by treatment of the composition of the present invention. Methods for obtaining mesenchymal stem cells from such known mesenchymal stem cell sources are well known in the art.
- the method of treating the PTK inhibitor for mesenchymal stem cells is not particularly limited. PTK inhibitors and mesenchymal stem cells may be contacted for a certain period of time so that PTK in the mesenchymal stem cells can be inhibited. In one embodiment, the treatment of the PTK inhibitor can be carried out by culturing the mesenchymal stem cells in a medium containing the PTK inhibitor.
- the concentration of PTK inhibitors treated on mesenchymal stem cells may vary depending on the type of PTK inhibitor, the duration of treatment on mesenchymal stem cells, or the degree of differentiation into cardiac cells. In one embodiment, the concentration of PTK inhibitor can be used in the range of 0.01-100 ⁇ M.
- culturing in a medium containing PTK inhibitor may be performed for 5 to 15 days, but is not limited thereto.
- the duration of treatment of PTK inhibitors on mesenchymal stem cells may vary depending on the type or concentration of PTK inhibitor being treated.
- cardiac cells includes all cells in the process of differentiation from mesenchymal stem cells to cardiomyocytes or cardiomyocytes.
- cardiac cells and “cardiomyocytes” are used interchangeably.
- cardiac cells differentiated from mesenchymal stem cells by treatment with PTK inhibitors express the expression of cardiac specific markers.
- Cardiac cells obtained according to the method of the present invention may be that the expression of cardiac specific markers is increased compared to mesenchymal stem cells.
- the cardiac specific marker may be selected from the group consisting of, but not limited to, cardiac troponin T (cTnT), myosin light chain (MLC) and myosin heavy chain (MHC).
- the cardiac cells may be that the expression of Cx43 (connexin 43) is increased compared to the mesenchymal stem cells.
- the cardiac cells may be that the expression of Ca 2+ homeostasis-related protein is increased compared to the mesenchymal stem cells.
- Ca 2+ homeostasis-related proteins may be, but are not limited to, SERCA 2a or LTCC.
- the present invention also provides a composition for inducing differentiation of mesenchymal stem cells into cardiac cells comprising a PTK inhibitor.
- the type of PTK inhibitor used in the present invention is not particularly limited.
- the PTK inhibitor can be a compound of Formula 1.
- Embodiments of the compound of formula 1 are as described above.
- the composition may include a medium generally used in the culture of mesoderm stem cells. Although not limited thereto, such a medium may include, for example, Minimum Essential Medium alpha (MEM-alpha), Mesenchymal Stem Cell Growth Medium (MSCGM), Dulbecco's Modified Eagle's Medium (DMEM), and the like.
- MEM-alpha Minimum Essential Medium alpha
- MSCGM Mesenchymal Stem Cell Growth Medium
- DMEM Dulbecco's Modified Eagle's Medium
- the composition for inducing differentiation of mesenchymal stem cells into cardiac cells containing PTK inhibitor may be introduced into the body separately from mesenchymal stem cells. That is, a composition containing a PTK inhibitor may be separately administered before or after the mesenchymal stem cells or simultaneously with the mesenchymal stem cells.
- the composition may comprise a known pharmaceutical carrier suitable for administration of a PTK inhibitor.
- the present invention provides a pharmaceutical composition for treating heart disease comprising cardiac cells differentiated from mesenchymal stem cells by the above method.
- the pharmaceutical composition for treating heart disease is not limited thereto, but may be usefully used for the treatment of heart diseases such as myocardial infarction, heart failure, and arrhythmia.
- the pharmaceutical composition may further include a known carrier used in the art for transplantation of stem cells.
- the effective amount of the cardiac cells may be 1 ⁇ 10 4 to 1 ⁇ 10 8 cells / kg. However, their dose may be increased or decreased depending on the weight, age, sex, and extent of the lesion of the patient.
- the preparations according to the invention can be applied to the human body by parenteral or topical administration.
- the active ingredient is suspended or dissolved in a pharmaceutically acceptable carrier according to the method described above, wherein a water-soluble carrier is preferably used.
- Transplantation of mesenchymal stem cells into the heart can provide immunological and functional improvement of the infarcted heart but cannot provide electrical stability, whereas mesenchymal stem cells treated with PTK inhibitors induce differentiation into cardiac cells Improved electromechanical integration with heart tissue provides electrical stability, which can effectively treat heart diseases such as myocardial infarction, heart failure, and arrhythmia.
- FIG 6 shows the actual image and activity map of the infarcted heart.
- FIG. 8 is a graph showing action potential durations (APDs) recorded from zones in which mesenchymal stem cells were transplanted.
- FIG. 9 shows ectopic rhythms in the sham-infused myocardium.
- CV 10 is a graph showing local conduction velocity (CV) in sham-infused heart and MSCs implanted heart.
- 11 shows the results of an electrical vulnerability test according to a burst pacing protocol.
- FIG. 12 shows a sequential voltage map during ventricular tachycardia (VT) at the MSCs-grafted site.
- VT ventricular tachycardia
- FIG. 13 shows the results of a sandwich ELISA showing that the degree of differentiation into cardiomyocytes increased with treatment concentration of Compound # 23.
- DMEM-Low Glucose obtained from MSCs (approximately 100 g) of femoral and tibial bone marrow fluid (approximately 100 g) of 4 week old male Sprague-Dawley rats and supplemented with 10% FBS and 1% antibiotic-penicillin / streptomycin solution (Invitrogen) Cultured in the medium. The collected medium was centrifuged at 1,600 rpm for 5 minutes, resuspended in MSC medium, and then percol density gradient centrifugation was performed at 1,600 rpm for 30 minutes with Ficoll-Paque TM PLUS (GE Healthcare Life Sciences).
- Bone marrow monocyte cells were recovered from the intermediate interface after centrifugation, washed twice with PBS, then resuspended in 10% FBS-DMEM and plated in 100 cm 2 flasks. Culture conditions were maintained at 37 ° C. in a humid atmosphere containing 5% CO 2 . After 72 hours, non-attached cells were dropped from the flasks and the adhered cells were washed thoroughly twice with PBS. Fresh MSC medium was added and medium changed every 3 days for about 10 days to obtain MSCs. The characteristics of MSCs were verified by immunophenotyping. Cells were labeled for various markers conjugated with fluorescent antibodies (CD14, CD34, CD71, CD90, CD105 and ICAM-1; Santacruz Biotechnology), analyzed by flow cytometry and immunofluorescence.
- fluorescent antibodies CD14, CD34, CD71, CD90, CD105 and ICAM-1; Santacruz Biotechnology
- MSCs were aliquoted at 60 x plates at 2 x 10 5 cells / ml using the same medium as above, and the protein tyrosine kinase (PTK) inhibitor N- (3-bromophenyl) -6,7-die Treatment of oxyquinazolin-4-amine (N-3-bromophenyl) -6,7-diethoxyquinazolin-4-amine (Sigma) with a final concentration of 1 ⁇ M or 10 ⁇ M and containing the compound every 3 days It was replaced with fresh medium and incubated for 9 days.
- PTK protein tyrosine kinase
- Cardiomyocytes were obtained from Sprague-Dawley neonatal rat heart. To reduce erythrocytes, isolated heart tissue was washed with Dulbecco's phosphate-buffered saline solution (pH 7.4 Gibco BRL, NY). Using micro-incision scissors, the heart is incised to approximately 0.5 mm 3 pieces and 4 ml of collagenase II (1.4 mg / ml, 270 units / mg, Gibco BRL, NY) for 5 minutes at 37 ° C. In a humid chamber. The supernatant was then removed and washed with 10% FBS DMEM. The cells were resuspended in the same amount of fresh medium containing 10% FBS.
- the remaining tissues were treated with fresh collagenase II solution for an additional 5 minutes. The incubation process was repeated until the tissue was completely degraded. The resulting supernatant was centrifuged at 2000 rpm for 2 minutes at room temperature. The cell pellet was resuspended in 5 ml of cell culture medium, which was plated in a culture dish and incubated for at least 2 hours at 37 ° C. in a 5% CO 2 incubator. Attached cells are fibroblasts and non-attached cells are cardiomyocytes. Unattached cardiomyocytes were replated in 100 mm culture dishes (5 ⁇ 10 5 cells / ml) and incubated with ⁇ -MEM supplemented with 10% FBS.
- the heart was exposed through 2-cm extra left thoracotomy.
- the pericardium was cut and a 6-0 silk suture (Johnson & Johnson) was placed in the proximal portion of the left coronary artery under the left atrial appendage.
- the tip of the ligation was passed through a short plastic tube to form a noose.
- the noose was pressed onto the heart surface just above the coronary artery and the hemostat was applied to the noose. After 50 minutes of occlusion, the hemostat was removed and the noose was released for reperfusion, allowing the ligation to loosen on the heart surface.
- TTC staining was used to assess myocardial tissue viability and to measure myocardial infarction size.
- Tissue pieces were incubated for 20 minutes at 37 ° C. in a 1% 2,3,5-triphenyltetrazolium chloride (TTC) solution at pH 7.4.
- Tissues were fixed overnight at 4 ° C. with 10% PBS-buffer formalin.
- the heart was cut in the transverse axis and the size of myocardial infarction was assessed as a percentage of the cross-sectional area of the infarcted tissue of the left ventricle relative to the cross-sectional area of the entire left ventricle. Both sides of each TTC-stained tissue piece were photographed with a digital camera. Infarcted areas were measured using Image J 1.40g software.
- the implants were sacrificed at several intervals and their hearts were cut out.
- the heart was sparged-fixed for 10 hours (vol / vol) neutral buffered formaldehyde for 24 hours, cut transversely into four equally thick sections and embedded in paraffin in the usual manner. 5- ⁇ m thick sections were mounted on gelatin-coated glass slides so that different staining could be used on successive sections of tissue cuts through the implant area.
- Immunological analysis was performed using the manufacturer's instructions (Vector Laboratories). In summary, tissue sections were deparaffinized, rehydrated and rinsed with PBS. Antigen retrieval was performed by microwaveing with 10 mM sodium citrate, pH 6.0 for 10 minutes.
- Sections were incubated in 3% H 2 O 2 to quench endogenous peroxidase. Samples were blocked in 2.5% normal horse serum and incubated with primary antibodies (CD31, collagen I, fibronectin, alpha smooth muscle actin). Biotinylated pan-specific pluripotent secondary antibodies and streptavidin / peroxidase complex reagents were used for cardiac sections, which were stained with antibodies using a DAB substrate kit. Counterstaining was performed with 1% methyl green and dehydration proceeded with 100% N-butanol, ethanol and xylene. Another sequential section was analyzed with rabbit anti-connectin 43. FITC-conjugated goat anti-rabbit IgG was used as secondary antibody.
- the perfusion pressure was adjusted to ⁇ 60 mm Hg with a peristaltic pump.
- the heart was stained with a voltage sensitive dye, di-4 ANEPPS (Invitrogen), and 2.5 ml of stock solution (1 mg / ml of dimethyl sulfoxide, DMSO) was carried through a baffle trap on the aortic cannula.
- the heart was placed in the chamber to maintain temperature and to reduce the artificial consequences of movement, and 5 mM blebbistatin was added to the perfusate.
- the heart was illuminated with quasi-monochromatic light (500 ⁇ 30 nm) using two green LED lamps (LL-50R30-G25, Optronix, Seoul, Korea).
- the emitted fluorescence was filtered through a long-pass filter with a cutoff wavelength of 600 nm for V m recording. Fluorescence images obtained from the anterior surface of the heart were taken with a CCD camera (Model CA D1-0128T, Dalsa, Waterloo, Ontario, Canada) with a spatial resolution of 78 x 78 mm 2 per pixel and a maximum time resolution of 490 frames / sec. . The field of view was adjusted to 1.0 x 1.0 cm 2 to obtain 128 x 128 sites simultaneously.
- Optical recordings of the rhythm were continuously monitored by ECGs obtained by placing bipoles (one on top of the left ventricle and the other on the high side wall of the right ventricle) using the Biopac System (BIOPAC Systems Inc.). Vulnerability to VT was tested by burst stimulations of the ventricles performed with stimulation cycle length (S1S1-CL) starting at 300 ms and decreasing by 10-ms in steps of 10 ms. Data was analyzed with commercially available software using Matlab (Mathworks, Natick).
- Activity and repolarization time points at each site were determined from (dF / dt) max and (d 2 F / dt 2 ) max , which appeared to coincide with ⁇ 97% repolarization and recovery from non-compliance to the baseline.
- the data were calculated using the first derivative / second derivative (dF / dt, d 2 F / dt 2 ) in the spatial domain using a polynomial filter (3 rd order, 13 points) in the temporal domain. Isochronal maps of activity were generated as previously described (Choi, BR & Salama, G., J Physiol 529 Pt 1, 171-188 (2000)).
- the conduction velocity in the infarct or normal region was measured under point stimulation at a cycle length of 280 ms for 20 beats.
- Local conduction velocity vectors were estimated from the seven nearest pixels of each pixel within the active time of its temporal wavelength (Efimov, IR, et al., Circulation 90, 1469-1480 (1994)).
- the local CV distribution can have high frequency components, such as close proximity, motion artifacts caused by transmural activity and collisions between wavelengths.
- the local CV was spatially filtered using 7 x 7 nearest neighbor gaussian convolution, and the extreme change in the magnitude was suppressed using log-transformation.
- Rise time was determined from an action-potential amplitude of 10% to 90% from the action potential and low-pass filtered with an averaging kernel of 1ms.
- Immunocytochemical characterization of MSCs was verified as follows. Cells were incubated in a 4-well slide chamber, washed with PBS and incubated for 10 minutes with 1% paraformaldehyde solution. Cells were then washed twice with PBS and infiltrated with 0.1% Triton X-100 for 7 minutes. Thereafter, cells were blocked for 1 hour with blocking solution (PBS containing 2% bovine serum albumin and 10% horse serum) and FITC-conjugated mouse, rabbit and goat antibodies (Jackson Immunoresearch) used as secondary antibodies. Laboratories) were combined. Then they were detected by confocal microscopy (Carl Zeiss).
- Capture antibody 100 ng was bound to polyvinylchloride (PVC) microtiter high binding plate (96 wells) at 4 ° C. overnight. Plates were washed twice with PBS and captured antibody with PBS containing 5% BSA was blocked overnight at room temperature under a humid atmosphere. After washing the plate twice with PBS, 5 ug of cell lysate was added to each well with blocking buffer and the plate was incubated at 37 ° C. for 1.5 hours. Plates were washed four times with PBS containing 0.02% tween-20. After adding the detector antibody, the plates were incubated for 2 hours at room temperature in a humid atmosphere and washed four times with PBS containing 0.02% tween-20.
- PVC polyvinylchloride
- TMB tetramethylbenzidine
- Cells were washed once with PBS, 20 mM Tris (pH 7.5), 150 mM NaCl, 1 mM Na 2 -EDTA, 1 mM EGTA, 1% Triton, 2.5 mM sodium pyrophosphate, 1 mM ⁇ -glycerophosphate, It was dissolved for about 20 minutes in lysis buffer (Cell Signaling Technology) containing 1 mM Na 3 VO 4 , 1 mg / ml leupeptin and 1 mM phenylmethylsulfonyl fluoride. Cell lysates were centrifuged at 12,000 g for 10 minutes to obtain supernatant. Protein concentration was measured using the Bradford Protein Assay Kit (Bio-Rad).
- Quantitative proteins were separated on a 12% sodium dodecyl sulfate-polyacrylamide gel and transferred to a polyvinylidene difluoride membrane (Millipore). After blocking the membrane with Tris-buffered saline-Tween 20 (TBS-T, 0.1% Tween 20) containing 5% nonfat dry milk, the membrane was washed twice with TBS-T and the primary antibody (ERK and p Incubated overnight at 4 ° C with Santa Cruz Biotechnology (ERK). The membrane was washed three times with TBS-T for 10 minutes and then incubated with horseradish peroxidase-conjugated secondary antibody for 1 hour at room temperature. After extensive washing, the bands were detected with enhanced chemiluminescent reagents (GE Healthcare Life Sciences). Band intensities were quantified using Image J 1.40g software (NIH).
- Complementary DNA was generated with Reverse Transcription System (Promega) according to the manufacturer's instructions.
- RNA 1 ⁇ g total RNA was added to 5 mmol / L MgCl 2 , 10 mmol / L Tris-HCl (pH 9.0 at 25 ° C.), 50 mmol / L KCl, 0.1% Triton X-100, 1 mmol / L dNTP, 20 U RNase 20 ⁇ l reaction mix containing inhibitor, 0.5 ⁇ g oligo- (dT) 15 primer, 10 U reverse transcriptase was reversed at 42 ° C. for 15 minutes and heated at 99 ° C. for 5 minutes to terminate the reaction. I was.
- PCR mix was combined with 200 mM Tri-HCl (pH 8.8), 100 mM KCl, 1.5 mmol / L MgSO 4 , 1% Triton X-100, 0.1 mM dNTP and 1.25 U Taq polymerase in a total volume of 25 ⁇ l. Each primer of pmol / ⁇ l is contained.
- PCR conditions were as follows: 1 cycle of denaturing for 3 minutes at 94 ° C., 35 cycles of denaturation for 30 seconds at 94 ° C., annealing for 30 seconds at 49 ° C., 2 minutes extension at 72 ° C., and final extension at 72 ° C. for 10 minutes.
- RT-PCR products were separated by electrophoresis on 1.2% agarose gel and visualized by staining with ethidium bromide.
- cytokines in the region into which cells were injected were measured using rat cytokine array 3.1 (RayBiotech) according to the manufacturer's instructions.
- 1 x Cell Lysis Buffer was used to extract proteins from tissue. After extraction, the sample was centrifuged to store the supernatant. Protein concentration was measured and diluted with 2 x Cell Lysis Buffer with H 2 O. 2 ml 1 x Blocking Buffer was added to the sample and incubated at room temperature for 30 minutes to block the membrane. Membranes were incubated with 1 ml of sample for 1-2 hours at room temperature, removed from each vessel and washed three times for 5 minutes at room temperature with 2 ml of 1 ⁇ Wash Buffer I while shaking.
- the blot was then washed twice with 2 ml of 1 x Wash Buffer II for 5 minutes at room temperature while shaking. 100 ⁇ l of biotin-conjugated anti-cytokine was gently mixed with 1 ⁇ blocking buffer and incubated for 1-2 hours at room temperature. Wash Buffer I and II were poured into blots five times and 1,000-fold diluted HRP-conjugated streptavidin was injected into each membrane for 2 hours at room temperature. Wash Buffer I and II were poured into the blot five times and samples were added with 250 ⁇ l of 1 ⁇ Detection Buffer C and 250 ⁇ l of 1 ⁇ Detection Buffer D at room temperature for 2 minutes. Finally, the array was exposed to x-ray film and the signal was detected using a chemiluminescent imaging system.
- ECG surface 6-lead ECG (lead II shown in the figure) was obtained for 5 minutes in rats implanted with control, sham, MSCs, and CPMs.
- R-R interval, PR interval, QRS duration, QT and corrected QT duration were measured by continuous evaluation as previously described. All data were obtained at 1 ksps (kilo-sample per second) using the Bard stamp amplifier system (C.R. Bard Inc.).
- left ventricular catheter insertion was performed on days 7-11.
- a Millar Mikro-tip 2 F pressure transducer (model SPR-838, Millar Instruments, Houston, TX) was inserted into the left ventricle through the right carotid artery under zoletil (20 mg / kg) and xylazine (5 mg / kg) anesthesia.
- Real time pressure-volume loops were recorded by blind investigators and all data analyzed offline using PVAN 3.5 software (Millar).
- MSCs-grafted myocardium were examined through the immunological assay described above.
- 2 shows the results of TTC staining to assess the viability of myocardial tissue and to measure myocardial infarction size.
- 3 shows the results of Masson's trichrome staining to detect interstitial fibrosis in cell transplants. Compared with the sham-injected region, the degree of fibrosis mixed with the surviving myocardium, which promotes re-entry, was reduced in the mesenchymal stem cell transplanted region.
- left ventricular end diastolic diameter (LVEDD); Left ventricular end systolic diameter (LVESD); Fractional shortening (FS); Left ventricular end diastolic volume (LVEDV); Left ventricular end systolic volume (LVESV); Left ventricular ejection fraction (LVEF).
- mesenchymal stem cells were electrically stable in the infarcted heart by optical mapping using Langendorff perfusion and electrical weakness tests. The effect on the was further evaluated.
- FIG. 6 shows the actual image (left panel) of the infarcted heart.
- the infarcted area is clearly identified by the blue color change, and the marginal portion 2 in which slow propagation occurs can be identified from the activity map (middle and right panels).
- 7 shows action potentials in control, sham-infused, MSCs-, and CPMs-grafted hearts.
- ectopic pulsation results in mesenchymal stem cell transplantation.
- action potential durations recorded from the zone where the mesenchymal stem cells were transplanted were similar to the uninfarcted area (101.9 in MSCs-grafted heart). ⁇ 14.9 ms vs. 103.5 ⁇ 14.1 ms, and 92 ⁇ 7.4 mm / ms vs.
- the local conduction velocity (CV) from the time of activation of the action potential was still lower in the region where mesenchymal stem cells were transplanted compared to other non-infarcted regions, which was mesenchymal stem It may be due to the nature of not responding to the stimulation of cells and their ability to act as a current sink (Chang, MG , et al. Circulation 113, 1832-1841 (2006); Beeres, SL , et al. J Am Coll Cardiol 46, 1943-1952 (2005)).
- FIG. 11 shows the results of an electrical vulnerability test according to a burst pacing protocol.
- the left panel of FIG. 11 shows a graph of ventricular tachycardia (VT) or ventricular fibrillation (VF) induction of normal, sham-injected and MSCs-transplanted groups.
- VT ventricular tachycardia
- VF ventricular fibrillation
- Fig. 1h shows representative examples of ECG in the burst pacing protocol electrical vulnerability ex vivo test. Burst stimulations of 220 ms cycle length (CL) induced VT in the sham-operated heart. While reducing the CL stepwise to 90 ms, VT was readily induced at 100 ms of CL in MSC implanted hearts, while not at 90 ms of CL in normal controls. Arrows indicate electrical stimulation.
- FIG. 12 shows a sequential voltage map during ventricular tachycardia (VT) at the MSCs-grafted site. It can be seen that the single re-entry forming the helical wavelength slowly propagates to the MSCs-injection area (red circle) (top view of the left panel) and is fixed to the MSCs-injection area (lower view of the left panel). Here, the white arrows indicate the direction of wave propagation. The right panel shows a visual recording of action potentials. This is a result showing that the flow of electricity is not smooth at the injection site of MSCs.
- VT ventricular tachycardia
- FIG. 13 is a result of a sandwich ELISA showing that the degree of differentiation into cardiomyocytes increases with the treatment concentration of compound # 23.
- PTK inhibitors were found to induce differentiation of mesenchymal stem cells into cardiomyocytes by increasing the expression of cardiac troponin T (cTnT) in a dose dependent manner.
- MSCs have several potential advantages over other stem cells for heart repair, they still face some challenges to be addressed in preclinical studies. Although preconditioning of MSCs, including genetic modifications, has been done to increase the therapeutic efficacy, the most obvious concern is how implanted MSCs can complete electromechanical integration with host tissues. Our results show for the first time that new cell types derived from MSCs overcome the suboptimal prevention of sudden death caused by pure MSCs after transplantation, and to improve electromechanical integration in cell-based therapies for myocardial infarction. Provide a new strategy. In conclusion, the modification of MSCs into cardiomyocytes by PTK inhibitors that are compatible with the electromechanical properties of host tissues after transplantation may be the best therapeutic strategy for the clinical application of MSCs to infarcted myocardium.
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Abstract
Description
Claims (20)
- PTK(Protein Tyrosine Kinase) 저해제를 중간엽 줄기세포에 처리하는 것을 포함하는 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제2항에 있어서,R1, R2, R3, R4, R5 및 R6는 각각 독립적으로 H, C1-4알킬 또는 C1-4알콕시이고,R7은 C1-4알킬, C1-4알콕시, 하이드록시, 카르복시 및 할로겐 원자로 이루어진 군으로부터 선택되는 하나 이상의 치환체로 치환되거나 비치환된 페닐인중간엽 줄기세포의 심장성 세포로의 분화 유도 방법
- 제2항에 있어서,R1, R2, R3, R4, R5 및 R6는 각각 독립적으로 H 또는 C1-4알콕시이고,R7은 C1-4알킬, C1-4알콕시, 또는 할로겐 원자로 치환되거나 비치환된 페닐인중간엽 줄기세포의 심장성 세포로의 분화 유도 방법
- 제1항에 있어서,PTK 저해제는 N-(3-브로모페닐)-6,7-디에톡시퀴나졸린-4-아민인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제1항에 있어서,골수, 조직, 배아, 제대혈, 혈액 또는 체액으로부터 얻은 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제1항에 있어서,PTK 저해제의 처리는 중간엽 줄기세포를 PTK 저해제를 포함하는 배지에서 배양함으로써 수행되는 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제7항에 있어서,배양은 5일 내지 15일 동안 수행되는 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제1항에 있어서,심장성 세포는 심근세포 특이적 마커의 발현이 중간엽 줄기세포에 비해 증가되어 있는 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제9항에 있어서,심근세포 특이적 마커는 cTnT(cardiac troponin T), MLC(myosin light chain) 및 MHC(myosin heavy chain)으로 이루어진 군으로부터 선택되는 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제1항에 있어서,심장성 세포는 Cx43(connexin 43)의 발현이 중간엽 줄기세포에 비해 증가되어 있는 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제1항에 있어서,심장성 세포는 Ca2+ 항상성-관련 단백질의 발현이 중간엽 줄기세포에 비해 증가되어 있는 것인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- 제12항에 있어서,Ca2+ 항상성-관련 단백질은 SERCA 2a 또는 LTCC인 중간엽 줄기세포의 심장성 세포로의 분화 유도 방법.
- PTK(Protein Tyrosine Kinase) 저해제를 포함하는 중간엽 줄기세포의 심장성 세포로의 분화 유도용 조성물.
- 제15항에 있어서,R1, R2, R3, R4, R5 및 R6는 각각 독립적으로 H, C1-4알킬 또는 C1-4알콕시이고,R7은 C1-4알킬, C1-4알콕시, 하이드록시, 카르복시 및 할로겐 원자로 이루어진 군으로부터 선택되는 하나 이상의 치환체로 치환되거나 비치환된 페닐인중간엽 줄기세포의 심장성 세포로의 분화 유도용 조성물
- 제15항에 있어서,R1, R2, R3, R4, R5 및 R6는 각각 독립적으로 H 또는 C1-4알콕시이고,R7은 C1-4알킬, C1-4알콕시, 또는 할로겐 원자로 치환되거나 비치환된 페닐인중간엽 줄기세포의 심장성 세포로의 분화 유도용 조성물
- 제14항에 있어서,PTK 저해제는 N-(3-브로모페닐)-6,7-디에톡시퀴나졸린-4-아민인 중간엽 줄기세포의 심장성 세포로의 분화 유도용 조성물.
- 제1항 내지 제13항 중 어느 한 항에 따른 방법에 의해 중간엽 줄기세포로부터 분화 유도된 심장성 세포를 포함하는 심장질환 치료용 의약 조성물.
- 제19항에 있어서,심장질환은 심근경색, 심부전 또는 부정맥인 심장질환 치료용 의약 조성물.
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