KR20130088460A - Composition for preserving cells, tissue or organs containing fimasartan - Google Patents

Abstract

PURPOSE: A composition for preserving cells, tissues, or organs is provided to regulate the functions of mitochondria using fimasartan, and to suppress cell apoptosis in cells, tissues, or organs, thereby protecting the cells, tissues, or organs from damage caused by cryopreservation, transplantation, or reperfusion. CONSTITUTION: A composition for preserving cells, tissues, or organs contains fimasartan and prevents ischemic injury or reperfusion injury. Fimasartan blocks mitochondrial calcium channels and suppresses cell apoptosis in the cells, the tissues, or the organs. The composition is used for in vitro preservation of the cells, the tissues, or the organs and preserves the cells, the tissues, or the organs during laparotomy or during or after transplantation. A composition for preventing or treating damage caused by ischemia or reperfusion contains fimasartan.

Description

Composition for preserving cells, tissue or organs containing Fimasartan}

The present invention relates to a composition for preserving cells, tissues or organs for preventing ischemic injury or reperfusion injury, and to a composition for preventing or treating ischemic injury or reperfusion injury.

Ischemia is a reduction of local blood flow, with a lack of oxygen supply than the oxygen demand for physiological function. Reperfusion is the supply of blood back to tissue, which is essential for the survival of ischemic tissue, but further accelerates tissue damage due to the reoxidation of tissues that tend to be very sensitive to oxidative damage during ischemia. This is called ischemia and reperfusion (I / R) damage.

The results of ischemia and reperfusion result from reversible and irreversible cellular tissue damage, decreased cell death and efficiency of organ function. Ischemia and reperfusion are diseases that are directly related to human life, i.e., ischemic heart disease, stroke, shock, which are the main causes of heart-related deaths, and human cells or tissues that are closely related to cancer and aging, are severely damaged if they fall into ischemia over a long period of time. Finally, cell death is reached. On the other hand, when oxygen load is suddenly applied by ischemia reperfusion for a certain period of time, more serious obstacles may be caused. Although ischemic reperfusion disorder is known clinically as a disease seen in organ transplantation or revascularization for myocardial infarction, the fact that a free radical reaction is involved in tissue damage caused by ischemia reperfusion using the small intestine of a cat. Since this pointed out (Granger, DN et.al .: Superoxide radicals in feline intestinal ischemia.Gastroentero1.22-29, 1981), research in this field has expanded significantly in the brain, heart, stomach, liver, kidney, etc. Ischemic reperfusion disorders and the involvement of free radicals and free radicals have also been reported.

It is known that a group of complex events occur due to prolonged ischemia of metabolic tissue (more than twenty minutes) and subsequent reperfusion. During the period of ischemia, intracellular antioxidant enzyme activity is reduced, including the activity of superoxide dismutase (SOD), catalase, and glutathione, and glutathione oxidase activity concomitantly increases in vascular endothelial tissue during ischemia. After the increase of oxygen free radicals in these ischemic cells, reperfusion in that state can lead to reversible and irreversible damage to the oxidative rupture and other cells making up the ischemic reperfusion organ matrix in the ischemic cells. For example, if cardiac organs are taken into account, reversible oxidative damage contributes to myocardial stunning, while irreversible damage occurs to the heart itself as a myocardial infarction. Reperfusion of this ischemic myocardial tissue can also cause electrophysiological changes, including potential lethal arrhythmias.

The present invention is to provide a composition for the preservation of cells, tissues or organs including Fimasartan (Fimasartan) and prevent ischemic injury or reperfusion injury.

In addition, the present invention is to provide a composition for preventing or treating damage by ischemia or reperfusion, including Fimasartan (Fimasartan).

The present invention provides a composition for preserving cells, tissues or organs, including Fimasartan and preventing ischemic injury or reperfusion injury.

The Pimasartan may block the mitochondrial calcium channel.

The pimasartan may inhibit apoptosis in cells, tissues or organs.

The composition may be for ex vivo storage of cells, tissues or organs, preservation of cells, tissues or organs during laparotomy, preservation of cells, tissues or organs after transplantation or transplantation.

The present invention provides a composition for preventing or treating injury due to ischemia or reperfusion, including Fimasartan.

The injury may be damage to one or more organs selected from the group consisting of heart, brain and small intestine.

Damage to the heart may include myocardial infarction, heart failure, ventricular fibrillation or arrhythmia.

Fimasartan of the present invention blocks mitochondrial calcium pathways by controlling the function of mitochondria and can inhibit apoptosis in cells, tissues, or organs. In addition to being effective as a prophylactic or therapeutic composition, it can be utilized as a composition for preserving cells, tissues, or organs to prevent damage caused by cryopreservation, transplantation, or reperfusion after transplantation of cells, tissues or organs.

Figures 1A and 1B show the size of infarcts in the left ventricle (LV) and area at risk (AAR) according to treatment with Pimasartan (sham group; n = 7, control group; n = 9, and fimasartan group; n = 9).
Figure 2 shows LV myocardial strain patterns according to whether treatment with Pimasartan.
Figure 3A shows the degree of DNA fragmentation indicating apoptosis, Figures 3B and 3C show the TUNEL analysis and relative ratios of the heart and cardiomyocyte (H9c2) cells (18-hour hypoxia and 48-hour reoxygenation), respectively Figure 3B shows the results of TUNEL analysis at the border area after ischemia / perfusion, and Figure 3C shows the anti-suicide effect of pimasantan on hypoxia / reoxygenation of H9c2 cells.
Figure 4 shows a representative image of the TUNEL staining in LV, Figure 4A is a simplified representation of the TUNEL analysis method, Figure 4B is a sham, Figure 4C control, Figure 4D darker stained apoptosis group treated Reactants were shown on the background of methylgreen and arrows indicate apoptotic cells.
Figure 5 shows TUNEL staining in H9c2 cells, Figure 5A is a hypoxic / 18 hours reoxidation process for 18 hours, Figure 5B is an image from DAPI staining, TUNEL analysis and culture from the left panel It will show a mixture of two images of H9c2.
6 shows the Bax, Bcl-2 and Bax / Bcl-2 ratios (n = 4) according to whether Pimasartan was treated by immunoblotting.
FIG. 7A shows the experimental protocol in the Langndorff system, showing samples at baseline (a), 30 minutes global ischemia (b), 30 minutes reperfusion (c), FIG. 7B Figure 7C shows immunoblotting and relative ratios of phospho-Akt, phospho-glycogen synthase kinase 3β, and GSK-3β in isolated hearts treated with Sartan, FIG. The immunoblotting of p53 and Bcl-2 at 30 minutes of reperfusion was shown. 50 μmol / L of Pimatantan was used and the control was set to 100%.
FIG. 8A shows the measurement of I _{Ca , L} using whole cell patch-clamps with or without pimasartan in isolated cardiomyocytes, and FIG. 8B shows the membrane capacitance in membrane capacitance. Normalized peak internal current (pA / pF) graphs were shown for GSK-3β as glycogen synthase kinase-3β; I _{Ca, L} shows an L- type Ca ^{2 +} currents (N = 5 ~ 7 / group . * P <0.05 vs control).
FIG. 9A shows mitochondrial oxygen consumption rates in state 3 (active) and state 4 (rest) using fiber optical oxygen electrodes, and FIG. 9B shows respiration control index (state3 / state4). 9C shows ATP content in mitochondria measured by luciferase assay kit.
10A to 10C are mitochondria-specific MitoSox red of the property to digest from the base line by using a confocal microscope (O ^{2 -} production) (Fig. 10A), TMRE (membrane potential) (Figure 10B) and Rhod2 AM (calcium) ( Figure 10C) shows intensities of cardiac muscle cells in the absence of Pimasartan (a, b, and c) and in the presence (d, e and f) hypoxia (15 minutes) and reoxidation (30 minutes). Where (a) and (d) represent baselines; (b) and (e) indicate hypoxia; (c) and (f) represent reoxygenation.
Figure 11 shows the Rhod2-AM intensity induced by histamine (MCU activator) according to the treatment of Pimasartan (N = 4 ~ 6 / group, * p <0.05 vs control).

The present invention provides a composition for preventing cells or tissues or organs, including Fimasartan and preventing ischemic or reperfusion injury, and a composition for preventing or treating damage due to ischemia or reperfusion, including Fimasartan. to provide.

Hereinafter, the present invention will be described in detail.

The present invention provides a composition for preserving cells, tissues or organs, including Fimasartan and preventing ischemic injury or reperfusion injury.

Pimasartan is 2-n-butyl-5-dimethylaminothiocarbonylmethyl-6-methyl-3-[[2 '-(1H-tetrazol-5-yl) biphenyl-4-yl] methyl] Pyrimidine-4 (3H) -one (2-n-butyl-5-dimethylaminothiocarbonylmethyl-6-methyl-3-[[2 '-(1H-tetrazol-5-yl) biphenyl-4-yl] methyl] pyrimidin- A compound of the angiotensin receptor blocker (ARB) family, designated 4 (3H) -one, which blocks the effects of angiotensin II on vascular smooth muscle and exhibits direct antihypertensive effects. It is known to have an indirect antihypertensive effect by blocking the effects of angiotensin II on storage and vascular elasticity, and may be represented by the formula (1).

[Formula 1]

Mitochondria are intracellular organelles that are present in most eukaryotic cells and have their own mitochondrial DNA (mtDNA), which is separated from nuclear DNA, and produces ATP, an intracellular energy source, for various energy-required biosynthesis and various It can be used to drive metabolic activity. In addition, mitochondria store calcium ions, which play an important role in intracellular signaling, in the substrate and supply them to the cytoplasm when necessary, and may also play a role in controlling cell death, proliferation, and metabolism.

Pimasartan of the present invention can control the mitochondrial function, the function control can be made by blocking the mitochondrial calcium channel. Pima Sar carbon treatment can suppress the mitochondrial Ca ^{2 +} overload possible through L- type Ca ^{2 +} current (I _{Ca, L)} and mitochondrial calcium uni Porter (mitochondrial calcium uniporter, MCU).

In addition, Pimasartan can inhibit apoptosis in cells, tissues or organs by minimizing p53 reduction and Bcl-2 associated with activation of Akt and GSK-3. As shown in the Examples of the present invention, DNA is inhibited by treatment of Pimasartan during ischemia-reperfusion, and Bax / Bcl-2, which is an important determinant in apoptosis, is treated by Pimasartan treatment. Significantly decreased, and the collapse of the membrane potential for mitochondrial O ^{2 -} production and digestion was greatly weakened.

Thus, castor oil Sar shots can regulate the Bcl-2 and prevented by inhibiting the Ca ^{2 +} overload, or more mitochondrial function during ischemia and reperfusion or apoptosis.

The ischemic injury may be damage to cells, tissues or organs caused by reduced blood flow or severe block of blood flow.

The reperfusion injury may be to accelerate tissue damage by reperfusion of the tissue ischemic damage when the flow of blood to the body part is temporarily stopped (ischemic) and then resumed (reperfusion).

The mechanism of tissue ischemia and reperfusion injury has not been fully understood, but important causes include oxygen radical response, calcium influx, increased prostaglandin, inflammatory response due to increased leukocyte activity, and decreased blood flow due to vascular endothelial injury. In addition, the apoptosis caused by this may be regarded as the main cause. The Pimasartan treatment of the present invention not only blocks oxygen radical reaction and calcium influx, but also inhibits apoptosis, thereby ischemic cell, tissue or organ ischemia. Damage or reperfusion injury can be prevented or treated.

The composition of the present invention is applicable in all cases to prevent ischemic injury or reperfusion injury, for example, in vitro storage of cells, tissues or organs, preservation of cells, tissues or organs during laparotomy, graft surgery or cells after transplantation It can be used to prevent ischemic or reperfusion injury in the preservation of tissues or organs.

The organ transplantation may be performed by (1) organ extraction, (2) cold storage of the organs removed, (3) ischemic period during transplantation, and (4) reperfusion process. Since transplantation can result in ischemic damage during storage and transplantation, the transplantation must be completed as soon as possible to ensure the function or high survival rate. However, when organ storage or transplantation time is delayed, tissue ischemia progresses and ischemic damage is caused, and reperfusion damage may occur during reperfusion after transplantation.

The compositions of the present invention are highly useful for the preservation of cells, tissues or organs in vivo during laparotomy in addition to the storage of transplant organs, preservation of ex vivo cells, tissues or organs, as well as during various types of surgery including laparotomy or Thereafter, the ischemia damage or reperfusion injury can be prevented by adding the fimasartan to blood substitutes.

The composition may be suitable for preventing ischemic or reperfusion injury of cells, tissues or organs of animals such as mammals including humans.

The composition may include water, sugars, pH buffers, and antioxidants. For example, sugars, sugars such as raffinose and mannitol, pH buffers such as sodium phosphate and potassium phosphate, and antioxidants. Including the substance can further increase the long-term storage efficiency, but the scope of the present invention is not limited by these additives.

In addition, as an example of obtaining a composition for cell, tissue or organ preservation of the present invention, it can be obtained by adding Pimasartan to a cell, tissue or organ composition known in the art, the known composition for preservation The kind is not particularly limited, and may include a Collins solution, a Euro-Collins (EU) solution, a Sacks solution, a HTK solution, a UW solution developed by the University of Wisconsin, and the like.

It is of great value to preserve cells, tissues or organs from ischemic and reperfusion injury as described above. Preferentially, the function of the tissues or organs is maintained after surgery or transplantation to increase the survival rate of the recipients, reminiscent of retention periods to better match the HLA, and to provide a longer distance to the matched recipients. Can carry.

The present invention provides a composition for preventing or treating injury due to ischemia or reperfusion, including Fimasartan.

Pimasartan of the present invention blocks the mitochondrial calcium channel and inhibits apoptosis, thereby preventing or treating damage due to ischemia or reperfusion.

The injury due to ischemia or reperfusion may be caused by internal damage in vivo, or may include any damage caused during artificial external treatment such as tissue transplantation or surgery.

The damage caused by the ischemia or reperfusion is not particularly limited in terms of damage, and may be damage to each part of the heart, stomach, small intestine, liver, pancreas, kidney, brain, eye, skin, or organs during organ transplantation. Preferably, the damage is at least one organ selected from the group consisting of heart, brain and small intestine.

Brain injury due to ischemia or reperfusion is not particularly limited in its kind, but may include, for example, ischemic brain edema, stroke, Alzheimer's disease or Parkinson's disease.

Heart damage due to the ischemia or reperfusion is not particularly limited in its kind, but as an example Myocardial infarction, heart failure, ventricular fibrillation or arrhythmia may be included.

Small intestine damage due to ischemia or reperfusion is not particularly limited in its kind, but may include, for example, shock, metabolic acidosis, or dehydration.

Fimasartan of the present invention may include 0.001 to 99% by weight based on the total weight of the composition, but the scope of the present invention is not limited thereto.

The composition for preventing or treating damage due to ischemia or reperfusion containing pimasartan of the present invention may further include appropriate carriers, excipients and diluents commonly used in the manufacture of pharmaceutical compositions. The pharmaceutical compositions of the present invention may be prepared in any formulation conventionally prepared in the art, as long as it does not violate the object of the present invention (e.g., Remington's Pharmaceutical Science, latest edition; Mack Publishing Company, Easton PA). .

When the present formulation is used for oral administration, the above fimasartan may be added with suitable additives such as lactose, sucrose, mannitol, corn starch, synthetic or natural rubber, excipients of crystalline cellulose, starch, cellulose derivatives, gum arabic, gelatin, Binders such as polyvinylpyrrolidone, carboxymethyl cellulose calcium, sodium carboxymethylcellulose, starch, corn starch, disintegrating agents such as sodium alginate, lubricants such as talc, magnesium stearate, sodium stearate, calcium carbonate, sodium carbonate, phosphoric acid It can be suitably mixed with fillers or diluents such as calcium and sodium phosphate, and the like to form solid preparations such as tablets, powders (powders), pills and granules.

In addition, when the composition for preventing or treating ischemic or reperfusion injury of the present invention is used for parenteral administration, fimasartan may be purified by a suitable buffer such as purified water or phosphate buffer, physiological saline solution such as physiological saline solution, Ringer's solution, and lock solution, As sterile aqueous solutions, non-aqueous solutions, suspensions, liposomes or emulsions, suitably combined with ethanol, glycerin and commonly used surfactants, preferably intravenous, subcutaneous, intramuscular, intraperitoneal, as sterile aqueous solutions for injection or spray Intestinal, bronchial, or the like. It may be desirable for the liquid formulation to have a physiological pH, preferably a pH in the range of 6-8.

The dosage of the composition of the present invention, that is, a typical dosage of pimasartan, an active ingredient per adult, may be 10 to 500 mg, and preferably 60 to 120 mg, but this may depend on the age, condition, and symptoms of the patient. It is preferable to increase or decrease appropriately, and the scope of the present invention is not limited to this. The daily dose may be administered once a day or dividedly two to three times a day at appropriate intervals, or intermittently at several days intervals. Since the dosage of the composition of the present invention is determined in view of various related factors such as the route of administration, the age, sex, weight of the patient, the severity of the patient and the like, the dosage is understood to limit the scope of the invention in any aspect. Is not.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples are intended to illustrate the present invention and the scope of the present invention is not limited by the following examples.

< Example >

Example  1: Preparation of Sample

Male Sprague-Dawley (SD) mice (SPF class, 250-350 g) were purchased from Charles River Laboratories International Inc., USA.

Fimasartan is preceded by BR-A-657 [2-butyl-5-dimethylaminothiocarbonylmethyl-6-methyl-3-[[2 '-(1H-tetrazol-5-yl) biphenyl-4-yl] methyl] pyrimidin-4 (3H) -one (molecular formula, C27H31N7OS; molecular weight 501.65)], purchased from Boryung Pharmaceutical.

Upon administration, Pimasartan was dissolved in distilled water. Randomly, 15 rats per group were included and divided into 3 groups. Groups 1 and 2 were treated with vehicle (distilled water), which served as a sham control and an ischemia / reperfusion control. Group 3 was administered intravenously with pimasartan intravenously using an injector (PILOT-C, Fresenius Vial, FRANCE) at a dose of 3 mg / kg 30 minutes before ligation for 30 minutes.

Histamine, protease inhibitor cocktail and phosphatase inhibitor cocktail were purchased from Sigma Chemical (St. Louis, Mo.). Tetramethylrhodamine, ethyl ester (TMRE), MitoSoxRed and Rhod2-AM were obtained from Molecular probes (Eugene, OR) Other compounds were purchased from Sigma Antibodies were obtained from Cell Signaling Technology (Beverly, MA) Obtained from

Example  2: surgical procedure ( Surgical procedure )

Standard surgical ligation of the left anterior descending coronary artery (LAD) was performed; simply, with zoletil (50 mg / kg) and xylazine (3mg / kg). Animals were anesthetized and ventilated using a respiratory machine at a respiratory rate of 80 / minute at a tidal volume of 10 ml / kg body weight using a small rodent respirator after tracheotomy. Blood pressure was recorded from the common carotid artery using a pressure transducer, and heart rate was recorded using an electrocardiogram (ECG).

Myocardial ischemia was induced through the suture of LAD with 4-0 silk suture, and was confirmed by discoloration of the ischemia zone. Electrocardiograms were monitored for changes in the ST-T segment induced by ischemia. After 30 minutes of ischemia, the suture was released for reperfusion of the myocardium by restoring the coronary circulation, and myocardial reperfusion was confirmed in this state as a change in the color of the myocardium. Suture remained until the end of the prototype. The chest was closed and the mice recovered from anesthesia. 24 hours after reperfusion, rats were anesthetized again, echocardiography was performed, and heart rate, pressure, volume, and LV using Mikro-Tip Catheter Transducer (2F, Millar Instruments, Inc. Houston, Texas, USA). DP / dT was measured and mice were deeply anesthetized with saturated KCl and euthanized.

Left ventricle specimens were collected for analysis. A sham control was obtained by following the same procedure except inducing myocardial ischemia / reperfusion.

Example  3: Echocardiography  ( Echocardiograms )

Echocardiography was performed using a commercially available ultrasound system (Acuson Sequoi 512C system, Siemens, Mountain View, CA, USA) equipped with a linear array transducer (14 MHz). The chest was shaved and the animal was placed on a heating pad in the lying down position. Echocardiography of one channel was obtained on an imaging system.

M-mode images of two-dimensional ultrasound cine loops and three continuous beats were obtained. Imaging depth was adjusted to 30 or 40 mm and temporal resolution was obtained from 100 to 150 Hz.

For M-mode recordings, parasternal long-axis view was used. Left ventricular end-diastolic dimension (LVIDd), left ventricular end-systolic dimension (LVIDs), interventricular septum thickness (IVSd), left ventricular posterior wall M-mode measurement of thickness, LVPWd) was performed. From these measurements, left ventricular end diastolic volume (LVEDV), left ventricular end systolic volume (LVESV), fractional shortening (FS), ejection fraction (EF), Stroke volume (SV) and cardiac output (CO) were obtained.

Doppler of early diastolic transmitral flow velocity (E wave), late diastolic transmitral flow velocity (A wave), E / A ratio and E deceleration time Measurements were made using an apical four-chamber view.

As shown in FIG. 2, LV internal parameters, ejection fraction and fractional shortening were less varied in the Pimasartan treated group and myocardial infarction (MI) in the Pimasartan group. LV myocardial strain patterns were maintained.

Example  4: Measurement of infarct size ( Determination of infarct you )

24 hours after reperfusion, infarct sites were measured in each group of rats. The chest was reopened and the coronary artery was resealed and 1.5 ml of Evan 'blue dye 5% was injected into the inferior vena cava. The heart was incised and cross-sectioned into 5-6 pieces approximately 2 mm thick and then incubated in 1% 2,3,5-triphenyl tetrazolium chloride (TTC) phosphate buffer (pH 7.4) for 20 minutes at 37 ° C.

The fragments were magnified and photographed with a digital camera to identify uncolored by the blue dye, necrotic zone (unstained by TTC), and non-ischemic zones (colored by blue dye). . The ischemic and normally perfused and necrotic and non-necrotic sites in each piece were identified by a computer with an image analysis system (Image-Pro Plus 3.0; Media Cybernetics, Silver Spring, MD). Infarct size was expressed as a percentage of myocardium that was not stained with a percentage of left ventricular weight (%, infarct size / left ventricular) or Evans blue (%, infarct size / myocardium at risk).

As shown in FIGS. 1A and 1B, the infarct size of the control group was 30.4 ± 5.6% of the left ventricle and 47.3 ± 7.9% of the area at risk (AAR), but the left ventricle was pretreated with Pimasartan pretreatment. , LV) and AAR significantly reduced the size of infarction to 14.5 ± 6.0% and 25.2 ± 7.6%, respectively.

Example  5: Confirmation of Apoptosis

To determine the effect of Pimasartan on apoptosis, DNA laddering was analyzed in Pimasartan heart using sham, control and non-isotopic versions. Fresh LV tissue samples obtained from ischemic sites and non-ischemic border sites were homogenized in lysis buffer. The resulting DNA was dissolved in 20 μl DNA suspension buffer. The same amount of DNA was identified on 1.8% agarose gel. DNA ladders were photographed with a camera equipped with a UV transilluminator and a 520nm filter.

As shown in FIG. 3A, DNA segments showing apoptosis were clearly seen in the control group, but significantly reduced in the Pimasartan treated group.

Example  6: organization TUNEL  analysis ( TUNEL assay in tissue )

Deoxynuclotidyl transferase [TdT] mediated dUTP in situ nick end labeling (TUNEL) analysis was used to analyze apoptotic cell number and morphology. The 5 mm transversal LV site was fixed with neutral formalin (4% formaldehyde in 0.15 mol / L phosphate buffer, pH7.4), then cut into the paraffin and analyzed.

The beeswax was removed and rehydrated, then the 5 μm tissue pieces were permeated with methanol / acetone (1: 1) for 10 minutes at room temperature, rinsed with PBS, then 50 mmol / Tris / HCl (pH 7.5), 5 mmol / 1 incubated at 37 ° C. for 15 min with 50 μg / ml protease K (Sigma) in CaCl ₂ .

Endogenous peroxidase was inactivated by incubation with 2% H ₂ O ₂ at room temperature for 5 minutes. DNA fragments were analyzed using the ApopTag kit. A positive control (by pretreating the sections with 1 U / ml DNase for 15 minutes at 37 ° C.) and a negative control (no digoxigenin-dUTP or TdT) were used.

As shown in FIG. 3B and FIG. 4, TUNEL analysis at the border area after ischemia / reperfusion revealed that apoptotic cardiomyocytes were less visible in the Pimasartan group.

Example  7: H9c2 Cardiac myoblast  ( cardiomyoblast On) Hypoxia  ( hypoxia ) / Property digestion ( reoxygenation Measurement of apoptosis after)

H9c2 cells were plated at 3 × 10 ⁵ / well in 6 well tissue culture plates at 75% confluence and pimasartan (24 hours prior to hypoxia / reoxygenation in DMEM without glucose and FBS). 50 μmol / L) or vehicle. Following 18 hour oxygen depletion treatment (95% N ₂ , 5% CO ₂ ), reoxygenation (95% O ₂ , 5% CO ₂ ) was performed for 48 hours. The adhered cells were fixed with 4% paraformaldehyde, and then apoptosis was confirmed by In Situ Cell Death Detection Kit (Roche, Mannheim, Germany).

Fixed cells were treated with permeabilization solution for 2 minutes on ice. After rinsing the cells twice with PBS, TUNEL reaction mixture was added to the cells and the cells were incubated at 37 ° C. for 60 minutes in the dark. The cells were rinsed with PBS, and then the apoptotic cells were analyzed directly under a fluorescence microscope.

As shown in FIG. 3C and FIG. 5, the anti-apoptotic effect of pimasartan was confirmed in hypoxia / reoxygenation on H9c2 cells.

Example  8: Perfusion of Isolated Rat Heart

Male Wistar rats (250-350 g) were anesthetized with Pentobarbital sodium (100 mg / kg, ip). The heart was quickly removed and placed on the Langendorff instrument. The heart was perfused with Krebs-Henseleit buffer containing 118.5 NaCl, 4.7 KCl, 1.2 MgSO ₄ , 1.8 CaCl ₂ , 24.8 NaHCO ₃ , 1.2 KH ₂ PO ₄ , and 10 glucose (in mmol / L), which was 37 ° C. Injecting with 95% O ₂ /5% CO ₂ gas.

All hearts have stabilized for at least 20 minutes. Parmesantan (50 μmol / L) was pretreated for 30 minutes and global ischemia (30 minutes) and reperfusion (30 minutes) were introduced. Heart tissue samples were taken at baseline, and ischemia and reperfusion were immunoblotted against phospho-AKt (ser473), phospho-glycogen synthetase kinase-3β (ser9), p53 and Bcl-2.

As shown in FIG. 6, the heart of the mice treated with Pimasartan relatively increased Bcl-2 (anti-apoptotic) and decreased Bax (pro-apoptotic) protein, resulting in Bcl-2 / The proportion of Bax showed a markedly increased result.

As shown in FIG. 7, in the Langndorff model (FIG. 7A), isolated hearts treated with Pimasartan are glycogen synthetase kinase 3β, known as Akt phosphorylation (at Ser473) and kinase for survival. GSK-3β) phosphorylation (at Ser9) was increased (FIG. 7B). Pimasartan pretreatment significantly increased Akt and GSK-3β upon reperfusion in rat heart tissue. Hearts reperfused after global ischemia increased p53 levels and decreased Bcl-2 levels than the Pimasartan group (FIG. 7C).

Example  9: separation of mitochondria, oxygen consumption and ATP  content

In the hypoxia / reoxygenation experimental model, after stabilization, the heart was perfused with NT solution in the presence or absence of fimasartan (50 μmol / L) for 30 minutes continuously. The perfusion buffer was then changed to ischemic solution (pH 6.0, adjusted using NaOH and equilibrated with 100% N ₂ at 135-140 mmHg) for 30 minutes and perfused with Tyrode solution for 1 hour.

Cardiac tissue and mitochondria were used to measure ATP content and oxygen consumption, respectively. ATP production in the heart of rats was measured using an adenosine 5'-triphosphate bioluminescent assay kit (Sigma).

The tissue was homogenized in 2.5% Trichloroacetic acid (v / v), centrifuged at 10,000 g for 5 minutes, and then the supernatant was used to measure ATP production. ATP measurements were performed on 96-well plates using an Lmax luninometer (Molecular Devices).

Mitochondria were isolated using medium-fitting glass-Teflon Potter-Elvehjem homogenizer. Cardiac tissue was treated with 5 MOPS, 50 sucrose, 200 mannitol and 5 potassium phosphate added with 0.1% Bovine serum albumin, protease inhibitor cocktail (pH 7.4). phosphate), 1 EGTA (in mmol / L), and homogenized in mitochondrial isolation buffer.

The homogenate was centrifuged at 1000 × g for 5 min at 4 ° C., and the supernatant obtained was centrifuged at 10,000 × g for 10 min, the mitochondrial fillets were collected and diluted with three times the mitochondrial separation buffer. Mitochondrial oxygen consumption was measured using fiber optic oxygen electrodes (Optical Optic Oxygen Electrode, Ocean Optics, Inc., Dunedin, FL) in a 600-ul air-saturated chamber at room temperature.

Respiration medium was 145 mmol / L KCl, 30 mmol / L HEPES, 5 mmol / L KH ₂ PO ₄ , 3 mmol / L MgCl ₂ , 0.1 mmol / L EGTA, and 0.1% bovine serum albumin at pH 7.4. (Bovine serum albumin). Mitochondrial state 4 (resting) respiration is analyzed using 5 mmol / L glutamate / malate as substrate. State 3 (active) respiration was measured by adding 0.5 mmol / L adenosine diphosphate (ADP) to the medium. Oxygen consumption is expressed as nmol O ₂ / min / mg mitochondrial protein. The respiratory control index (RCI) is the ratio of ADP-stimulated (state 3) breaths to resting (state 4) breaths.

As shown in FIG. 9, in an isolated rat heart model of I / R (ischemia / reperfusion), only active state respiration was significantly impaired in the control group (FIGS. 9A and 9B), but the respiratory injury was Pimasar It was significantly inhibited by pretreatment of coal (control vs pimasartan; 22.3 ± 2.3 vs 30.9 ± 2.0). In addition, the respiration control index was significantly improved in fimasartan treated mitochondria and preserved ATP content better than the control (FIG. 9C).

Example  10: Worston Blotting  ( Western blotting )

25 mmol / L Tris-HCl (pH 7.6), 150 mmol / L NaCl, 1% NP-40, 1% sodium deoxycholate, 0.1% SDS, and protease inhibitor cocktail and force Protein extracts from myocardial tissue were homogenized in RIPA buffer containing a phosphatase inhibitor cocktail.

The homogenized sample was sonicated and then centrifuged at 13,500 g at 4 ° C. for 30 minutes. Protein concentrations were determined using BCA assay kits (Pierce, Rockford, IL). Equal amounts of protein were loaded onto SDS-polyacrylamide gels and electrophoresed and transferred to PVDF membranes.

Membranes were detected as primary antibodies. Each primary antibody binding was detected as a secondary antibody and visualized by the ECL method. Loading of each sample was confirmed by probing the membrane with antitubulin or antibetaactin.

Example  11: one heart Myocyte  detach

Isolation of cardiomyocytes was performed. Mice were anesthetized and exposed to the chest cavity and a glass cannula inserted into the aorta. The heart was rapidly cut through thoracotomy and perfused in a non-circulating Langendorff system using Tyrode solution, then balanced for 10 minutes at 37 ° C. with 95% O ₂ and 5% CO ₂ and removing all blood.

Stabilization phase (20 minutes perfusion in normal Tyrode ' solution) after the last, the heart 8 minutes Ca ^{2 +} -free Tyrode solution was perfused for 10 minutes 0.01% collagenase (collagenase) a Ca ^{2 +} -free Tyrode added Perfused with solution. The heart was then washed with Kraft-Bruhe solution (pH 7.4), oxygenated for 15 minutes. Atria was removed, the left ventricular wall and septum were cut into small pieces, and stirred in Kraft-Bruhe solution to separate cardiomyocytes.

Example  12: L-type Ca ^{2 +}  Current Whole Cell Patch Clamp  ( Whole - cell patch clamp recording )

To record a L- type Ca ^{2 +} currents, by the addition of Cs ⁺ in the internal solution and external solution to inhibit K ⁺ current. By applying a holding potential of tetrodotoxin (20 μmol / L) and -50 mV inhibited Na + and T-type Ca ^{2 +} currents. Muscle cells were placed in an inverted microscope at 143 NaCl, 5.4 KCl, 0.33 NaH ₂ PO ₄ , 1.8 CaCl ₂ , 0.5 MgCl ₂ , 5.0 HEPES, and 16.6 glucose (adjusted to pH 7.4 with NaOH) (as mmol / L) Perfusion was continuously carried out with an extracellular solution containing.

When filled with a standard internal solution consisting of 32 CsCl, 100 Cs-Asp, 10 EGTA, 10 HEPES, and 5 MgATP (adjusted to pH 7.25 with CsOH) (as mmol / L), bath solution resistance is 2 to 3 MΩ. It was. Whole-cell patch clamp recording was made with an Axon interface and an Axonpatch 1C amplifier (Axon Instruments, Union City, CA).

Example  13: heart and Myocytes  perfusion

Myocytes were stained with 0.1 μmol / L TMRE (excitation / emission: 564/580 nm) for 30 minutes at room temperature. After washing, the cells were placed in a perfusion chamber. MitoSOX Red (5 μmol / L; excitation / emission: 510/580 nm) was used to detect mitochondrial superoxide changes in mitochondria.

Cells were stained (30 min, 37 ° C.) and then washed with Kraft-Bruhe solution. The light intensity was measured using a confocal microscope. Rhod-2AM (5 μmol / L; excitation / emission: 533/576 nm) was used to measure mitochondrial calcium. After cool-warm, cells were washed with Kraft-Bruhe solution. Myocytes were perfused continuously with Tyrode solution with 50 μmol / L pimasartan for 15 minutes and with ischemic solution (pH 6.0, adjusted using NaOH and equilibrated with 100% N ₂ at 135-140 mm Hg) for 20 minutes, Tyrode The solution was reperfused for 30 minutes. The glare was measured every 30 seconds using a laser scan confocal microscope of x200 magnification. Images were analyzed using LSM-510 META software (Carl Zeiss, Jena, Germany). Histamine (Histamine, 100 μmol / L) to convey the mitochondrial Ca ^{2 +} through mitochondrial calcium uni-Porter activity was used.

As shown in Figures 10A to 10C, mitochondrial O ₂ ^- production and Ca ^{2 +} overload induced by re-digestion in cardiac myocytes was significantly weakened, and the indirect index of permeability transition (ΔΨm) was more pronounced in parmasanthin than in the control group. Well preserved

As shown in FIGS. 8A and 8B, the treatment of Pimasartan in cardiomyocytes inhibited I _{ca , L} activity in mitochondria, and as shown in FIG. 11, the treatment of Pimasartan in cardiomyocytes showed histamine (MCU) in mitochondria. activator) induced an increase in calcium.

Claims (7)

A composition for preserving cells, tissues or organs, including Fimasartan, which prevents ischemic or reperfusion injury. The composition of claim 1, wherein the Pimasartan blocks the mitochondrial calcium channel. The composition of claim 1, wherein the Pimasartan inhibits apoptosis in cells, tissues, or organs. The cell, tissue or organ preservation according to claim 1, wherein the composition is for ex vivo storage of the cell, tissue or organ, for the preservation of the cell, tissue or organ during laparotomy, for the preservation of the cell, tissue or organ after transplantation or transplantation. Composition. A composition for preventing or treating damage caused by ischemia or reperfusion, including Fimasartan. The composition of claim 5, wherein the injury is damage to one or more organs selected from the group consisting of heart, brain and small intestine. The composition of claim 6, wherein the heart is damaged, including myocardial infarction, heart failure, ventricular fibrillation, or arrhythmia.

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