Method for preparing induced pluripotency stem cells from mesenchymal stem cells by using phlorotannin fraction

Abstract

The present invention relates to a medium composition for the dedifferentiation of induced pluripotency stem cells, containing a phlorotannin fraction extracted and isolated from one type of brown algae selected from the group consisting of Ecklonia cava, Dictyopteris prolifera, Dictyota coriacea, Sargassum horneri, Ishige okamurai and the like. In addition, the present invention relates to a method for preparing induced pluripotency stem cells by using the medium composition. Induced pluripotency stem cells can be safely, easily and effectively prepared by using mesenchymal stem cells by using the medium composition of the present invention, and the prepared induced pluripotency stem cells can be differentiated into various cells, and thus can be useful as a cell therapeutic agent.

Claims

1. A method for preparing induced pluripotency stem cells, comprising the steps of: (a) adding a fraction containing phlorotannin in a cell culture medium; and (b) culturing mesenchymal stem cells in the medium to dedifferentiate into induced pluripotent stem cells.

2. The method of claim 1, wherein the fraction containing phlorotannin is a bieckol compound represented by the following Chemical Formula 1 or salts thereof ##STR00005##

3. The method of claim 1, wherein the fraction containing phlorotannin is extracted and isolated from one type of brown algae selected from the group consisting of Ecklonia cava, Dictyopteris prolifera Okamura, Dictyota dichotoma Lamouroux, Sargassum horneri C. Agardh, Sargassum patens C. Agardh, and Ishige okamurae Yendo, or artificially synthesized.

4. The method of claim 1, wherein the fraction containing phlorotannin is included in the amount of 10 to 500 ?g/ml with respect to the medium composition.

5. The method of claim 1, wherein the medium further contains 0.01-10% (v/v) of purified deionized water containing SiO.sub.2, Al.sub.2O.sub.3, TiO.sub.3, Fe.sub.2O.sub.3, CaO, Na.sub.2O, K.sub.2O, and LiO.

6. The method of claim 1, wherein the medium is selected from the group consisting of DMEM (Dulbecco's Modified Eagle's Medium), MEM (Minimal Essential Medium), BME (Basal Medium Eagle), RPMI 1640, F-10, F-12, DMEM F-12, ?-MEM (?-Minimal Essential Medium), G-MEM (Glasgow's Minimal Essential Medium), IMDM (Iscove's Modified Dulbecco's Medium) and MacCoy's 5A medium.

Description

DESCRIPTION OF DRAWINGS

(1) FIG. 1 illustrates a condition for isolating a fraction from an Ecklonia cava extract.

(2) FIG. 2 illustrates a mass spectrum result of 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol represented by Chemical Formula 1.

(3) FIG. 3 illustrates a .sup.1H-NMR spectrum result of 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol represented by Chemical Formula 1.

(4) FIG. 4 illustrates a .sup.13C-NMR spectrum result of 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol represented by Chemical Formula 1.

(5) FIG. 5 illustrates a mass spectrum result of dieckol represented by Chemical Formula 2.

(6) FIG. 6 illustrates a .sup.1H-NMR spectrum result of dieckol represented by Chemical Formula 2.

(7) FIG. 7 illustrates a .sup.13C-NMR spectrum result of dieckol represented by Chemical Formula 2.

(8) FIG. 8 illustrates a mass spectrum result of phlorofucofuroeckol-A (PFF-A) represented by Chemical Formula 3.

(9) FIG. 9 illustrates a .sup.1H-NMR spectrum result of phlorofucofuroeckol-A (PFF-A) represented by Chemical Formula 3.

(10) FIG. 10 illustrates a .sup.13C-NMR spectrum result of phlorofucofuroeckol-A (PFF-A) represented by Chemical Formula 3.

(11) FIG. 11 illustrates a mass spectrum result of 974-A represented by Chemical Formula 4.

(12) FIG. 12 illustrates a .sup.1H-NMR spectrum result of 974-A represented by Chemical Formula 4.

(13) FIG. 13 illustrates a .sup.13C-NMR spectrum result of 974-A represented by Chemical Formula 4.

(14) FIG. 14 illustrates a mass spectrum result of 974-B represented by Chemical Formula 4.

(15) FIG. 15 illustrates a .sup.1H-NMR spectrum result of 974-B represented by Chemical Formula 5.

(16) FIG. 16 illustrates a .sup.13C-NMR spectrum result of 974-B represented by Chemical Formula 5.

(17) FIG. 17 illustrates formation of induced pluripotency stem cell colonies according to a concentration by treating a phlorotannin fraction of an Ecklonia cava extract by using a method (Experimental Example 1-1) of the present invention.

(18) FIG. 18 verifies that the cells induced by the method of the present invention (Experimental Example 1-1) are pluripotency stem cells by using expression of SSEA-4 and alkaline phosphatase which are pluripotency stem cell-specific proteins.

(19) FIG. 19 verifies that the cells induced by the method of the present invention (Experimental Example 1-1) are pluripotency stem cells by using expression of OCT4 and SOX2 which are pluripotency stem cell-specific genes.

(20) FIG. 20 illustrates formation of pluripotency stem cell colonies induced according to a concentration by treating a compound in a phlorotannin fraction by using a method (Experimental Example 1-2) of the present invention.

(21) FIG. 21 verifies that the cells induced by the method of the present invention (Experimental Example 1-2) are pluripotency stem cells by using expression of SSEA-4 and alkaline phosphatase which are pluripotency stem cell-specific proteins.

(22) FIG. 22 verifies that the cells induced by the method of the present invention (Experimental Example 1-2) are pluripotency stem cells by using expression of OCT4 and SOX2 which are pluripotency stem cell-specific genes.

MODES OF THE INVENTION

(23) According to an aspect of the present invention, the present invention provides a medium composition for dedifferentiating mesenchymal stem cells containing a phlorotannin fraction extracted and isolated from brown algae into induced pluripotency stem cells.

(24) The present inventor made an effort to find a method of inducing pluripotency stem cells with high efficiency in order to commercialize development of cell therapeutic agents with stability and high production efficiency without an ethical issue in breakage of embryos. As a result, it is verified that when a phlorotannin fraction isolated from a brown algae extract as a stable natural extract, preferably, an Ecklonia cava extract is added to a cell culture medium, amazingly, the induced pluripotency stem cells may be prepared with high efficiency.

(25) According to an exemplary embodiment of the present invention, the brown algae extract may be a brown algae-water extract, a brown algae-ethanol extract, a brown algae-methanol extract, or a brown algae extract using a mixed solvent of two or more selected from water, ethanol, and methanol.

(26) According to the exemplary embodiment of the present invention, the brown algae-water extract may be prepared by extracting the brown algae with water of 40 to 100? C. for 2 to 48 hours. The brown algae-ethanol extract may be prepared by extracting the brown algae with 35 to 80% ethanol at 20 to 60? C. for 2 to 36 hours. Further, the brown algae-methanol extract may be prepared by extracting the brown algae with 35 to 80% methanol at 20 to 60? C. for 2 to 36 hours.

(27) Ecklonia cava among the brown algae included in the medium composition of the present invention is a perennial alga of a laminariaceous laminariales brown plant that mainly lives in the southern coast, the coast of the Jeju Island, and the coast of the Ulleungdo island, mainly becomes food for abalone, turban, and the like, and used as the main raw material to make alginate or potassium iodide or for food.

(28) The Ecklonia cava extract included in the present invention may be extracted by using water and organic solvents including (a) anhydrous or water-containing low alcohol having 1 to 4 carbons (methanol, ethanol, propanol, butanol, n-propanol, iso-propanol, n-butanol, etc.), (b) a mixed solvent of the low alcohol and water, (c) acetone, (d) ethyl acetate, (e) chloroform, (f) 1,3-butylene glycol, (g) hexane, (h) diethyl ether, and the like, and preferably, may be extracted by using a mixed solvent of methanol or ethanol and water. In the case of extracting the Ecklonia cava extract by using the mixed solvent, the content of methanol or ethanol may be 50 to 80 v/v %. However, the present invention is not necessarily limited thereto.

(29) Phlorotannin isolated from the brown algae extract is a polyphenol-based compound containing phloroglucinol as a basic constituent unit. The phlorotannin is found in a lot of marine plants, particularly, brown algae in the natural world, and it is reported that the phlorotannin has various useful effects such as an antibacterial effect, an antioxidant effect, a hepatoprotective activity, an elastase inhibition activity, a hyaluronidase inhibition activity, a cardiovascular protection effect, and an anti-viral activity.

(30) In the present invention, particularly, a bieckol compound represented by the following Chemical Formula 1, a dieckol compound represented by the following Chemical Formula 2, a phlorofucofuroeckol compound represented by the following Chemical Formula 3, an eckol-based compound represented by the following Chemical Formula 4, and an eckol-based compound represented by the following Chemical Formula 5 are isolated and identified from the phlorotannin fraction of the Ecklonia cava extract, and expression ability of induced pluripotency stem cells thereof is verified. When the bieckol compound represented by the following Chemical Formula 1 among the compounds is added in the cell culture medium, it is verified that the induced pluripotency stem cells can be prepared with high efficiency.

(31) ##STR00003## ##STR00004##

(32) More particularly, Chemical Formula 1 is represented by 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol, Chemical Formula 2 is represented by dieckol, Chemical Formula 3 is represented by phlorofucofuroeckol-A (PFF-A), Chemical Formula 4 is represented by 974-A, and Chemical Formula 5 is represented by 974-B, and in the present invention, the compounds may be added in the cell culture medium alone or in combination thereof.

(33) The term embryonic stem cells used in the present invention are called cells having pluripotency as cells which are isolated and cultured from an inner cell mass of blastocyst in the early days of its development after fertilization. The term pluripotency stem cells used in the present invention are called stem cells having pluripotency which may be differentiated into three germ layers configuring the adult, that is, an endoderm, a mesoderm, and an ectoderm.

(34) The term differentiation used in the present invention means that while the cells are divided, proliferated, and grown, structures or functions thereof are specialized, that is, forms or functions are changed in order to perform tasks which are given to cells, tissues, and the like of an organism.

(35) The term cellular therapeutic agent of the present invention, as a drug used for treating, diagnosing, and preventing by using cells and tissues prepared through isolation from the human, culture, and a specific manipulation, means a drug used for treating, diagnosing, and preventing through a series of actions such as proliferating and screening homogenous or heterogeneous cells for restoring functions of cells or tissues, changing a biological characteristic of the cells by another method, and the like. The cell therapeutic agent is largely classified into a somatic cell therapeutic agent, a stem cell therapeutic agent according to differentiation of the cells, and the present invention particularly relates to the stem cell therapeutic agent.

(36) The mesenchymal stem cells of the present invention are cells isolated from embryonic stem cells or adult stem cells derived from mammalian, preferably mesenchymal stem cells derived from umbilical cord, and more preferably mesenchymal stem cells derived from human umbilical cord. The stem cells may be extracted and obtained from the umbilical cord that connects the placenta and the fetus in the human body. The extraction of the mesenchymal stem cells from the umbilical cord may be performed by using various methods, and for example, the umbilical cord is extracted from the human body to be washed with DPBS until the blood does not flow, and the washed umbilical cord is chopped with a surgical blade and incubated at 37? C. to obtain a solution containing mononuclear cells.

(37) The term medium used in the present invention means a mixture for culturing or differentiating cells such as stem cells in vitro, which contains required elements for growth and proliferation of the cell including sugars, amino acids, various nutrients, serum, growth factors, minerals, and the like.

(38) Various media are commercialized in the art and may be artificially prepared and used. As the commercialized medium, DMEM (Dulbecco's Modified Eagle's Medium), MEM (Minimal Essential Medium), BME (Basal Medium Eagle), RPMI 1640, F-10, F-12, DMEM F-12, ?-MEM (?-Minimal Essential Medium), G-MEM (Glasgow's Minimal Essential Medium), IMPM (Iscove's Modified Dulbecco's Medium), AmnioMax, AminoMaxII complete Medium (Gibco, Newyork, USA), MesenCult-XF Medium, and the like are included, and may be used as a basic medium included in a medium composition in addition to the medium which may be artificially prepared.

(39) In the basic medium, generally added serum components (for example, fetal bovine serum (FBS)), antibiotics (for example, penicillin and streptomycin), and the like may be added. The concentration of the serum component or the antibiotic component which is added in the basic medium may be modified within a range that can achieve the effect of the present invention, and preferably, 10% FBS, 100 unit/ml penicillin, 50 ?g/ml streptomycin, and the like may be added.

(40) Meanwhile, the concentration of the compound added to the DMEM may be modified within a range that can achieve the effect of the present invention.

(41) Further, the medium of the present invention may additionally include a nutrient mixture. The nutrient mixture is a mixture containing various amino acids, vitamins, inorganic salts, and the like which are generally used in a cell culture and may use a nutrient mixture which is prepared by mixing the amino acids, the vitamins, the inorganic salts, and the like or commercially prepared. The commercially prepared nutrient mixture may include M199, MCDB110, MCDB202, MCDB302, and the like as an example, but is not limited thereto.

(42) Further, the medium of the present invention may additionally include energy water for induction and stabilization of the pluripotency stem cells. The energy water is preferably added with 0.05 to 20 v/v % and more preferably 0.1 to 10 v/v %.

(43) The medium composition of the present invention is a specific medium to induction of the pluripotency stem cells and may be achieved by adding a phlorotannin fraction isolated from the brown algae extract in the basic medium, and may include a phlorotannin fraction isolated from an Ecklonia cava extract preferably at a concentration of 1 to 1,000 ?g/ml and more preferably at a concentration of 10 to 50 ?g/ml with respect to the entire medium composition. Further, at least one type selected from a group consisting of 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol of Chemical Formula 1, dieckol of Chemical Formula 2, phlorofucofuroeckol-A (PFF-A) of Chemical Formula 3, 974-A of Chemical Formula 4, and 974-B of Chemical Formula 5 may be used at 10 to 200 ?g/ml, more preferably 20 to 150 ?g/ml with respect to the entire medium composition.

(44) According to another aspect of the present invention, the present invention provides a method for preparing induced pluripotency stem cells including: adding a phlorotannin fraction isolated from an Ecklonia cava extract in a cell culture medium; and dedifferentiating mesenchymal stem cells into induced pluripotency stem cells in the medium.

(45) In the case, umbilical cord-derived mononuclear cells are added in the basic medium composition containing 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol or a mixture containing 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol and may be incubated in an incubator under a condition of humidity 95%, 37? C., and 5% CO.sub.2.

(46) In an exemplary embodiment of the present invention, the umbilical cord-derived mononuclear cells are incubated in the incubator under the condition and then a cell supernatant is removed after 5 days, and the cells are incubated by replacing the medium every 3 to 4 days. When the stem cells are incubated by using the culture medium composition containing 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol, induction of the pluripotency stem cells according to a concentration of 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol is observed. A DMEM F-12 medium is used as a control group and a medium containing O-(2,4,6-trihydroxyphenyl)-6,6-bieckol in the DMEM F-12 medium is used as an experimental group and mesenchymal stem cells derived from human umbilical cord are incubated in the medium treated for each concentration.

(47) As a result, it can be seen that when the mesenchymal stem cells are incubated in the medium composition of the present invention, colonies such as pluripotency stem cells are formed. The mesenchymal stem cells derived from the human umbilical cord form stem cell colonies in the medium of the present invention at 10 to 14 days. That is, it can be seen that the culture medium composition of the present invention forms pluripotency stem cell colonies from the mesenchymal stem cells derived from the human umbilical cord (see FIGS. 17 to 19).

(48) According to yet another aspect of the present invention, the present invention provides induced pluripotency stem cells prepared by the preparing method.

(49) The induced pluripotency stem cells of the present invention have the same differentiation as the embryonic stem cells and are almost the same as the embryonic stem cells even in shapes of the cells. According to the exemplary embodiment of the present invention, whether to express a specific gene (Nanog, Oct4, Sox2, Klf) and protein (SSEA-4) to the embryonic stem cells is examined, and as a result, it can be seen that the gene and the protein are expressed in the pluripotency stem cells induced by the present invention like the embryonic stem cells (see FIG. 19).

(50) According to still another aspect of the present invention, the present invention provides a cell therapeutic composition containing the induced pluripotency stem cells prepared by the preparing method.

(51) It can be seen that the induced pluripotency stem cells of the present invention have the same pluripotency as the embryonic stem cells, and according to the exemplary embodiment of the present invention, have pluripotency which may be differentiated into an ectoderm, a mesoderm, and an endoderm.

(52) Accordingly, the induced pluripotency stem cells of the present invention may be used as an effective cell therapeutic agent.

(53) The composition of the present invention may be administrated by any administration route, particularly, a method such as peritoneal or thoracic cavity administration, subcutaneous administration, intravenous or endovascular administration, intramuscular administration, local administration by injection, or the like.

(54) In the present invention, the composition may be administrated in a form such as Injections, suspensions, and emulsions on the basis of a general method, and if necessary, may be suspended in an adjuvant such as a freund complete adjuvant or administrated together with a material having an adjuvant activity such as BCG. The composition is sterilized or may contain adjuvants including stabilizers, wetting or emulsifying accelerators, salts or buffers for adjusting the osmotic pressure, and the like and other therapeutically valuable substances, and may be prepared by a general mixing, granulating, or coating method.

(55) The cell therapeutic composition according to the present invention may contain pharmaceutically acceptable carriers or additives, and may contain diluents (e.g., dextrose, sorbitol, cellulose, glycine, lactose, sucrose, and mannitol), binders (e.g., magnesium aluminum silicate, starch paste, tragacanth, sodium carboxymethyl cellulose), disintegrants (e.g., starch, agar, alginic acid, or sodium salts thereof), or a boiling mixture and/or absorbent agents, sweetening agents, flavoring agent, and coloring agents, in addition to active ingredients.

(56) The cell therapeutic composition according to the present invention can be applied to arthritis, neurological disorders, endocrine disorders, liver diseases, and the like and has a possibility to an allogenic therapeutic agent for the human according to clinical trial results for the human later.

(57) Hereinafter, the present invention will be described in more detail through Examples. However, the present invention is not limited to the exemplary embodiments disclosed below, but can be implemented in various forms. The following exemplary embodiments are described in order to enable those of ordinary skill in the art to embody and practice the invention.

EXAMPLES

Example 1: Preparation of Phlorotannin Fraction and Compounds of Chemical Formulas 1 to 5

Example 1-1: Preparation of Phlorotannin Fraction from Ecklonia cava Extract

(58) Herb medicine samples used in an experiment were purchased in the Jeju Island, received an evaluation of the expert, and used in the experiment. 100 g of a dried herb medicine sample was added in 1 L of 70% methanol, reflux-extracted for 16 hours, and filtrated by using a filter. A filtrate was concentrated in a rotary decompression evaporator and immediately freeze-dried to prepare an Ecklonia cava extract.

(59) 5 g of the Ecklonia cava extract was dissolved with 500 ?l methanol, absorbed on a C4 resin (Sepia tech), decompression-dried at 30? C. by using a rotary vacuum evaporator, and divided for each solvent by using Diaion HP-20 for small fractions. Gradient was given and methanol solvents having concentrations of 0%, 25%, 50%, 75% and 100% were prepared to perform the fraction. 5 small fractions are divided and a HPLC profile was verified (see FIG. 1). A fraction having the highest HPLC peak among the five small fractions was selected.

Example 1-2: Isolation and Purification of Phlorotannin Fraction

(60) The fractions obtained in Example 1-1 were applied to C-18 reverse-phased HPLC having a 60 min solvent gradient condition of acetonitrile 10 min, 20 to 55% acetonitrile 40 min, and 55 to 100% acetonitrile 10 min by using a C18 column (Phenomenex Luna C18 equipment, 10 ?m, 21.2?250 mm) and using solvents of acetonitrie containing 0.02% TFA and water at a flow rate 10 ml/min and UV 243 nm to be isolated into peaks C (RT 25 min), E (RT 33 min), G (RT 37.5 min), H (RT 38 min), and I (RT 38.5 min). A fraction from retention time 0 to peak C was called c, a fraction between the peak C and the peak E was called D, a fraction between the peaks E and G was called F, and a fraction after the peak I was called J.

(61) Each peak was purified by using C18 column (Phenomenex Luna C18 equipment, 10 ?m, 21.2?250 mm), using solvents of acetonitrie containing 0.02% TFA, methanol, and water at a flow rate 4 ml/min and UV 230 nm under each isocratic condition. Under an acetonitrile 28% isocratic condition, the peak E (RT 10 min), the peak G (RT 22 min), the peak H (RT 23 min), and the peak I (RT 27 min) were purified, respectively.

(62) However, as an analysis result after purification, it was verified that in the peak C, two substances were mixed, and then the two substances ware re-isolated into C-1 (RT 10 min) and C-2 (RT 13.5 min) under a methanol 26% isocratic condition.

Example 1-3: Structural Analysis of Polyphenol-Based Compound

(63) The molecular weight and the molecular formula of the compound purified in Example 1-2 were determined by using a high-performance liquid chromatography mass chromatography (HPLC-MS) and the structural identification of the compound was performed by analyzing .sup.1H NMR and .sup.13C-NMR spectrums through nuclear magnetic resonance (NMR).

(64) As a result, it was identified that Chemical Formula 1 was 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol, Chemical Formula 2 was Dieckol, Chemical Formula 3 was phlorofucofuroeckol-A, Chemical Formula 4 was 974-A, Chemical Formula 3 was 974-B. The structure of the isolated polyphenol-based compound was illustrated in the following Table 1 and structural features of each compound were as follows.

(65) TABLE-US-00001 TABLE 1 Retention Comp No. Comp. Code time (min) Material name C-1 Chemical STC-C-1 11.0 2-O-(2,4,6- Formula 1 trihydroxyphenyl)- 6,6-bieckol E Chemical STC-E 12.7 dieckol Formula 2 G Chemical STC-G 13.9 phlorofucofuroeckol-A Formula 3 H Chemical STC-H 14.2 974-B Formula 4 I Chemical STC-I 14.5 974-A Formula 5

(66) [Chemical Formula 1] 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol

(67) 1) Molecular weight: 866.65

(68) 2) Molecular formula: C42H26O21

(69) 3) .sup.1H NMR (400 MHz, DMSO) ? 9.28, 9.25, 9.14, 9.09, 9.06, 9.04, 8.95, 8.66, 8.61, 6.09, 6.07, 6.05, 5.91 (d, J=2.0 Hz, 1H), 5.84, 5.80, ?, 5.75 (d, J=2.0 Hz, 1H).

(70) 4) .sup.13C NMR (100 MHz, dmso) ? 160.6, 160.5, 158.9, 158.9, 154.8, 151.5, 151.4, 151.2, 147.4, 146.5, 144.6, 144.6, 141.7, 141.6, 141.5, 141.5, 137.4, 137.4, 125.0, 123.9, 123.0, 123.0, 122.8, 122.3, 122.3, 99.9, 99.8, 98.1, 98.1, 98.0, 96.2, 96.2, 96.1, 95.0, 94.3, 94.1.

(71) FIG. 2 illustrates a mass spectrum of the 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol. Further, FIGS. 3 and 4 illustrate a .sup.1H-NMR spectrum and a .sup.13C-NMR spectrum of the 2-O-(2,4,6-trihydroxyphenyl)-6,6-bieckol, respectively, and figures indicated in each peak corresponds to figures indicated in Chemical Formulas of FIGS. 3 and 4.

(72) [Chemical Formula 2] Dieckol

(73) 1) Molecular weight: 742.08

(74) 2) Molecular formula: C36H22018

(75) 3) .sup.1H NMR (400 MHz, MeOD) ? 6.16 (s, 1H), 6.14 (s, 1H), 6.10 (s, 2H), 6.07 (d, J=2.9 Hz, 1H), 6.06 (d, J=2.9 Hz, 1H), 5.99 (d, J=2.8 Hz, 1H), 5.96 (d, J=2.8 Hz, 1H).

(76) 4) .sup.13C NMR (125 MHz, MeOD) ? 162.70, 160.95, 160.91, 158.63, 156.82, 155.34, 153.22, 148.17, 148.13, 147.97, 147.75, 145.11, 144.95, 144.22, 144.13, 139.46, 139.29, 127.22, 126.98, 126.42, 126.37, 125.66, 125.40, 125.34, 100.65, 100.51, 100.25, 100.14, 98.44, 96.99, 96.63, 96.55, 96.15.

(77) FIG. 5 illustrates a mass spectrum of the dieckol. Further, FIGS. 6 and 7 illustrate a .sup.1H-NMR spectrum and a 13C-NMR spectrum of the dieckol, respectively, and figures indicated in each peak corresponds to figures indicated in Chemical Formulas of FIGS. 6 and 7.

(78) [Chemical Formula 3] phlorofucofuroeckol-A

(79) 1) Molecular weight: 602.07

(80) 2) Molecular formula: C30H18014

(81) 3) .sup.1H NMR (400 MHz, MeOD) ? 6.63 (s, 1H), 6.40 (s, 1H), 6.26 (s, 1H), 5.96 (d, J=2.1 Hz, 2H), 5.955.93 (t.like, 1H), 5.92 (t, J=2.1 Hz, 1H), 5.88 (d, J=2.1 Hz, 2H).

(82) 4) .sup.13C NMR (125 MHz, MeOD) ? 161.87, 161.84, 160.18, 153.15, 151.73, 151.15, 148.31, 148.21, 145.97, 143.92, 138.37, 135.29, 128.04, 124.94, 124.64, 122.27, 105.29, 99.91, 99.28, 97.69, 97.57, 96.18, 95.35, 95.29.

(83) FIG. 8 illustrates a mass spectrum of phlorofucofuroeckol-A (PFF-A).

(84) Further, FIGS. 9 and 10 illustrate a 1H-NMR spectrum and a 13C-NMR spectrum of the PFF-A, respectively, and figures indicated in each peak corresponds to figures indicated in Chemical Formulas of FIGS. 9 and 10.

(85) [Chemical Formula 4] 974-A

(86) 1) Molecular weight: 974.73

(87) 2) Molecular formula: C48H30023

(88) 3) .sup.1H NMR (400 MHz, MeOD) ? 6.63 (s, 1H), 6.40 (s, 1H), 6.25 (s, 1H), 6.20 (d, J=2.3 Hz, 1H), 6.18 (d, J=2.3 Hz, 1H), 6.12 (d, J=2.3 Hz, 1H, 6.04 (d, J=2.8 Hz, 1H), 5.92 (s, 2H), 5.925.91 (m, 1H), 5.90 (d, J=2.3 Hz, 1H), 5.87 (d, J=2.1 Hz, 2H), 5.74 (d, J=2.8 Hz, 1H).

(89) 4) .sup.13C NMR (125 MHz, MeOD) ? 163.16, 162.88, 161.83, 160.16, 159.64, 159.54, 159.14, 159.09, 156.55, 156.49, 156.48, 153.85, 153.35, 152.26, 151.92, 151.77, 151.18, 148.21, 147.78, 145.82, 144.31, 138.15, 135.16, 127.62, 124.93, 124.90, 124.25, 124.22, 122.27, 119.40, 118.15, 105.22, 105.21, 102.62, 102.44, 99.91, 99.24, 98.61, 98.32, 97.68, 97.57, 96.34, 96.11, 95.28, 95.20, 94.37, 94.18.

(90) FIG. 11 illustrates a mass spectrum of the 974-A. Further, FIGS. 12 and 13 illustrate a .sup.1H-NMR spectrum and a 13C-NMR spectrum of the 974-A, respectively, and figures indicated in each peak corresponds to figures indicated in Chemical Formulas of FIGS. 12 and 13.

(91) [Chemical Formula 5] 974-B

(92) 1) Molecular weight: 947.73

(93) 2) Molecular formula: C48H30023

(94) 3) .sup.1H NMR (400 MHz, MeOD) ? 6.69 (s, 1H), 6.38 (s, 1H), 6.21 (d, J=2.3 Hz, 1H), 6.19 (d, J=2.3 Hz, 1H), 6.17 (s, 1H), 6.14 (d, J=2.3 Hz, 1H), 6.05 (d, J=2.8 Hz, 1H), 6.00 (s, 2H), 5.91 (t, J=2.1 Hz, 1H), 5.89 (d, J=2.3 Hz, 1H), 5.87 (d, J=2.1 Hz, 2H), 5.76 (d, J=2.8 Hz, 1H).

(95) 4) .sup.13C NMR (125 MHz, MeOD) ? 161.85, 160.16, 159.64, 159.53, 159.19, 158.97, 157.45, 156.81, 156.63, 156.47, 153.79, 152.65, 152.22, 151.95, 151.66, 150.89, 148.32, 147.03, 143.86, 142.83, 138.07, 137.95, 127.35, 125.23, 124.65, 124.01, 123.93, 122.11, 109.85, 106.33, 102.68, 102.49, 99.62, 99.47, 98.61, 98.32, 97.61, 97.56, 96.45, 95.28, 95.13, 94.23, 92.83.

(96) FIG. 14 illustrates a mass spectrum of the 974-B. Further, FIGS. 15 and 16 illustrate a .sup.1H-NMR spectrum and a 13C-NMR spectrum of the 974-B, respectively, and figures indicated in each peak corresponds to figures indicated in Chemical Formulas of FIGS. 15 and 16.

Example 2: Isolation and Incubation of Mesenchymal Stem Cells from Human Umbilical Cord

Example 2-1: Extraction of Human Umbilical Cord

(97) An umbilical cord tissue was collected immediately after birth. The sample was first rinsed clean before being transferred to a laboratory and then immediately transferred to a 500 ml sterile glass bottle containing a F-12 medium added with a transfer medium (50 ?g/ml penicillin and 50 ?g/ml streptomycin (purchased from Invitrogen)). In the laboratory, stem cells were extracted in a flow hood of class 100 under a sterile condition. The sample was first transferred to a stainless steel container. The sample was washed with PBS several times and then the umbilical cord tissue sample was cut with a length of 2 cm and transferred to a cell culture dish with a diameter of 10 cm, and herein, additionally washed and treated with 70% ethanol for anti-infection, and then washed several times with PBS added with an antibiotic mixture (50 ?g/ml penicillin and 50 ?g/ml streptomycin (purchased from Invitrogen) until the solution was cleaned.

Example 2-2: Isolation and Incubation of Stem Cells from Human Umbilical Cord

(98) In order to isolate Wharton's jelly (a substrate of umbilical cord) from blood vessel of the umbilical cord and other internal elements, cutting of the umbilical cord tissue was first performed. The Wharton's jelly isolated after removing the blood vessel was cut to small pieces with a size (0.5 cm?0.5 cm) for extraction of cells. Explanting was performed by adding the pieces of the umbilical cord Wharton's jelly in different tissue culture dishes which had cell culture conditions suitable for extraction of epithelial stem cells or mesenchymal stem cells.

(99) For isolation/incubation of the mesenchymal stem cells, the explanted tissue was immersed in 5 ml DMEM (Dulbecco's modified eagle medium) F-12 (Gibco) added with 10% fetal bovine serum (FBS, Hyclone), 10% FBS, 100 unit/ml penicillin, and 50 ?g/ml streptomycin and maintained at 37? C. in a carbon dioxide cell incubator. The medium was replaced every 3 or 4 days. The outgrowth of the cells was monitored by an optical microscope. The outgrown cells were treated with Trypsin (0.125% Trypsin/0.05% EDTA) for additional expansion and refrigeration (using DMEM/10% FBS).

(100) The medium was replaced every 3 or 4 days. The outgrowth of the cells from the explanted tissue was monitored by an optical microscope.

(101) For extraction of the mesenchymal stem cells, pellets of the cells were re-suspended and counted in the medium DMEM F-12 (Gibco), 10% FBS, 100 unit/ml penicillin, and 50 ?g/ml streptomycin and inoculated on a 10 cm tissue culture dish at a density of 1?10.sup.6 cells/dish. The medium was replaced every 3 or 4 days. The outgrowth and colony formation of the cells were monitored by an optical microscope. In approximately 90% cell number (confluence), the cells were sub-cultured as described above.

Experimental Example 1: Induction of Pluripotency Stem Cells from Mesenchymal Stem Cells

Experimental Example 1-1: Preparation of Pluripotency Stem Cells of Mesenchymal Stem Cells Derived from Human According to Concentration of Phlorotannin Fraction

(102) An experiment for measuring induction ability of pluripotency stem cells from mesenchymal stem cells derived from human umbilical cord according to a concentration of the phlorotannin fraction prepared in Example 1-1 was performed. In a control group, DMEM F-12 (Gibco) as a dedicated medium of MSC, 10% FBS, 100 unit/ml penicillin, and 50 ?g/ml streptomycin were used as a basic medium (Normal), and in an experimental group, mesenchymal stem cells derived from human which was subjected to three sub-cultures were used and phlorotannin fractions having concentrations of 1 ?g/ml, 20 ?g/ml, 50 ?g/ml, 100 ?g/ml, 400 ?g/ml, 800 ?g/ml, and 1000 ?g/ml and 0.1 v/v % energy water (purified deionized water containing SiO.sub.2, Al.sub.2O.sub.3, TiO.sub.3, Fe.sub.2O.sub.3, CaO, Na.sub.2O, K.sub.2O, and LiO, STC) were added in the medium. The mesenchymal stem cells derived from human umbilical cord were isolated and washed and mononuclear cells were inoculated in a 6-well plate (dish) with 1?10.sup.4 cells and maintained and incubated at 37? C. and 5% CO.sub.2.

(103) With respect to the pluripotency stem cells induced by the method of the present invention, whether to express stage-specific embryonic antigen4 (SSEA-4), alkaline phosphatase (AP), OCT4, and SOX2 as specific proteins to embryonic stem cells was analyzed by using antibodies thereof and an immunochemical staining method. During the staining process, cells were first fixed by using 4% paraformaldehyde and washed with PBS, and blocked with a 1% BSA solution. The cells were treated with primary antibodies for OCT4, SOX2, and SSEA-4 and reacted at 4? C. for 18 hours, and then washed with PBS, treated with secondary antibodies with fluorescence (FITC) to the primary antibodies, and reacted at room temperature for 1 hour. The cells were washed with PBS and then the expression was analyzed by using a confocal microscope. The BF meant a bright field and the second drawing illustrated a staining result for protein expression, and the third drawing illustrated the combined two drawings (see FIGS. 19A, 19B, 20A, and 20B). AP staining was performed with an alkaline phosphatase cell-permeable fluorogenic substrate dye, the AP fluorogenic dye was diluted in a DMEM F-12 culture solution to be treated in colonies, and then reacted for 20 to 30 min, washed with the DMEM F-12 culture solution two times, and the expression was analyzed by using a confocal microscope, and the result was illustrated in FIG. 17.

(104) As a result, in the experimental group, only when the concentration of the phlorotannin fraction was 10 to 500 ?g/ml, it was observed that the colonies were formed after 10 days (see FIG. 17) and it was verified that only the colonies were stained by OCT4, SOX2, SSEA-4, and AP as pluripotency stem cell-specific markers to be the pluripotency stem cells (see FIGS. 18 and 19).

Experimental Example 1-2: Preparation of Pluripotency Stem Cells of Mesenchymal Stem Cells Derived from Human According to Concentration of Compound in Phlorotannin Fraction

(105) An experiment for measuring induction ability of pluripotency stem cells from mesenchymal stem cells derived from human according to a concentration of compound 1 among the compounds isolated in Example 1-2 was performed. In a control group, DMEM F-12 (Gibco) as a dedicated medium of MSC, 10% FBS, 100 unit/ml penicillin, and 50 ?g/ml streptomycin were used as a basic medium (Normal), and in an experimental group, mesenchymal stem cells derived from human umbilical cord which was subjected to three sub-cultures were used, and bieckol compound 1 represented by Chemical Formula 1 having concentrations of 1 ?g/ml, 20 ?g/ml, 50 ?g/ml, 100 ?g/ml, 400 ?g/ml, 800 ?g/ml, and 1000 ?g/ml and 0.1 v/v % energy water (purified deionized water containing SiO.sub.2, Al.sub.2O.sub.3, TiO.sub.3, Fe.sub.2O.sub.3, CaO, Na.sub.2O, K.sub.2O, and LiO, STC) were added in the medium. The mesenchymal stem cells derived from human umbilical cord were isolated and washed and mononuclear cells were inoculated in a 6-well plate (dish) with 1?10.sup.4 cells and maintained and incubated at 37? C. and 5% CO.sub.2.

(106) With respect to the induced pluripotency stem cells, whether to express stage-specific embryonic antigen4 (SSEA-4), alkaline phosphatase, OCT4, and SOX2 as specific proteins to embryonic stem cells was analyzed by using antibodies thereof and an immunochemical staining method. During the staining process, cells were first fixed by using 4% paraformaldehyde and washed with PBS, and blocked with a 1% BSA solution. The cells were treated with primary antibodies for OCT4, SOX2, and SSEA-4 and reacted at 4? C. for 18 hours, and then washed with PBS, treated with secondary antibodies with fluorescence (FITC) to the primary antibodies, and reacted at room temperature for 1 hour. The cells were washed with PBS and then the expression was analyzed by using a confocal microscope, and the result there of was illustrated in FIG. 20. The BF meant a bright field and the second drawing illustrated a staining result for protein expression, and the third drawing illustrated the combined two drawings (see FIGS. 21A, 21B, 22A, and 22B).

(107) AP staining was performed with an alkaline phosphatase cell-permeable fluorogenic substrate dye, the AP fluorogenic dye was diluted in a DMEM F-12 culture solution to be treated in colonies, and then reacted for 20 to 30 min, washed with the DMEM F-12 culture solution two times, and the expression was analyzed by using a confocal microscope, and the result was illustrated in FIG. 22B.

(108) As a result, in the experimental group, only when the concentration of the bieckol compound 1 represented by Chemical Formula 1 was 50 ?g/ml and 100 ?g/ml, it was observed that the colonies were formed after 14 days (see FIG. 20) and it was verified that only the colonies were stained by OCT4, SOX2, SSEA-4, and AP as pluripotency stem cell-specific markers to be the pluripotency stem cells (see FIGS. 21 and 22).