Compound additive having biological activation function, preparation method therefor and use thereof

Abstract

A compound additive having a biological activation function. The compound additive contains water or phosphate buffer, and multiple proteins and various factors dissolved therein. The compound additive can be added into a culture medium for cell cultivation, and can also be directly used or added into a skin repair product or a cosmetic product so as to achieve certain skin repair and cosmetic effects.

Claims

1. A method for manufacturing a medium for culturing stem cells, the method comprising preparing a premixed solution utilizing 0.1 parts by volume of β-mercaptoethanol, 1 part by volume of aqueous solution of non-essential amino acids, and 94 parts by volume of a-Minimum Essential Medium (a-MEM) or Dulbecco's Modified Eagle Medium nutrient mixture F-12 (DMEM-F12); and mixing the premixed solution and 5 parts by volume of a composite additive; and wherein the composite additive comprises water or 0.0067 M phosphate buffer; and following ingredients dissolved therein: 750 μg/mL human serum albumin; 150 μg/mL dermcidin; 150 μg/mL apolipoprotein A; 250 μg/mL haptoglobin; 250 μg/mL beta-globin; 150 μg/mL annexin A1; 300 μg/mL transthyretin; 100 μg/mL transgelin; 500 μg/mL human platelet factor 4; 100 μg/mL human platelet basic protein; 20 ng/ml platelet-derived growth factor-AB; 20 ng/ml platelet-derived growth factor-BB; 10 ng/ml insulin-like growth factor-1; 200 pg/ml epidermal growth factor; 200 pg/ml vascular endothelial growth factor; and 200 ng/ml fibroblast growth factor-2.

2. The method according to claim 1, wherein the stem cells are human umbilical cord mesenchymal stem cells isolated from a fresh umbilical cord tissue of a healthy newborn delivered naturally or by cesarean section.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings in detail, in which:

(2) FIG. 1 shows pictures of umbilical cord mesenchymal stem cells cultured in a serum-free medium formulated with the composite additive provided by the present invention, in which panel 1A shows cellular morphology of cells 2 hours after inoculation, panel 1B shows cellular morphology of cells 24 hours after inoculation, and panel 1C shows cellular morphology of cells 48 hours after inoculation.

(3) FIG. 2 shows a permeability curve of a cream prepared with the composite additive of the invention over time.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(4) The present invention will be further described in detail in combination with the specific embodiments hereinafter. The embodiments provided are only used to illustrate the present invention, rather than limiting the scope of the present invention in any way.

(5) Experimental methods in the following examples, if no any other special instruction is provided, are all conducted under conventional conditions or the conditions recommended by the instrument or reagent supplier. Materials used in the following examples, if no source of purchase is provided, are conventional products that can be commercially available.

EXAMPLE 1: PREPARATION OF THE COMPOSITE ADDITIVE AND CULTURE OF STEM CELLS

(6) Preparation of the Composite Additive:

(7) 75 mg human serum albumin, 15 mg dermcidin, 15 mg apolipoprotein A, 25 mg haptoglobin, 25 mg beta-globin, 15 mg annexin A1, 30 mg transthyretin, 10 mg transgelin, 50 mg human platelet factor 4, 10 mg human platelet basic protein, 2 μg platelet-derived growth factor-AB (PDGF-AB), 2 μg platelet-derived growth factor-BB (PDGF-BB), 1 μg insulin-like growth factor-1 (IGF-1), 20 μg fibroblast growth factor-2 (FGF-2), 20 ng epidermal growth factor (EGF), and 20 ng vascular endothelial growth factor (VEGF) that were accurately weighed or as a liquid measured were added into 75 ml sterile water, and the final volume was set to be 100 mL. The obtained composite additive was stored at 4° C.

(8) Preparation of a Serum-Free Medium:

(9) Composition: 0.1 parts by volume of β-mercaptoethanol, 1 part by volume of aqueous solution of non-essential amino acids (11140, Gibco), 94 parts by volume of a-MEM/DMEM-F12 and 5 parts by volume of the composite additive.

(10) The β-mercaptoethanol, the aqueous solution of non-essential amino acids and the a-MEM/DMEM-F12 were formulated into a premixed solution, and then the composite additive was mixed with the premixed solution.

(11) Culture of Cells:

(12) In a biosafety cabinet, the third generation human umbilical cord mesenchymal stem cells (hUC-MSCs) isolated from Wharton's jelly tissue of umbilical cord of a newborn delivered naturally were inoculated into a T175 cell culture flask at a density of 2×10.sup.4 cells/cm.sup.2, then the flask was transferred to a constant temperature incubator at 37° C., 5% CO.sub.2 after 15 ml of the serum-free medium was added therein. The cells were observed to have adhered 2 hours after inoculation. Cultured continuously, the cells were observed to have completely adhered 4 hours after inoculation, and 24 hours after inoculation, it was observed that the hUC-MSCs appeared as spindle-shape and gathered in whorls spreading much more, and the cells were bright, and 40-60% confluence was reached. Subsequent observation 48 hours after inoculation showed that the hUC-MSCs were bright and more than 90% confluence was reached. Then the cells were digested by trypsin, collected and cryopreserved. The results were shown in FIG. 1.

EXAMPLE 2: PREPARATION OF A CREAM CONTAINING THE COMPOSITE ADDITIVE AND EFFECTS THEREOF

(13) The composite additive was prepared with the same method as described in Example 1.

(14) Preparation of a Cream Containing the Composite Additive:

(15) Composition: 20 g stearic acid, 10 g liquid paraffin, 10 g glycerin, 2 g triethanolamine, 0.1 g ethyl Hydroxybenzoate, 3 g laurocapram, 10 ml of the composite additive and an appropriate amount of distilled water; the total amount of the cream is 100 g. In the cream, glycerin, triethanolamine, the composite additive and the distilled water serve as aqueous phase, and the rest serve as oil phase.

(16) The composite additive, the stearic acid, the glycerin, the liquid paraffin, the ethyl Hydroxybenzoate and the laurocapram were added to a beaker, and stirred to dissolve completely in a water bath at 100° C., and then the triethanolamine was added into the beaker, the obtained mixture was stirred till it condensed to obtain a white cream.

(17) Stability Test:

(18) 1. Centrifugal Test

(19) 10 g of the cream prepared above was taken and added into a graduated centrifuge tube, and then centrifuged at 2500 r/m in for 30 min.

(20) 2. Heat Resistance Test

(21) 10 g of the cream prepared above was taken and added into a graduated centrifuge tube, and the tube was then placed in a water bath with a constant temperature of 55° C. for 6 hours.

(22) 3. Cold Resistance Test

(23) 10 g of the cream prepared above was taken and added into a graduated centrifuge tube, and the tube was then placed in a refrigerator at −20° C. for 24 hours.

(24) 4. In Vitro Drug Release Test

(25) A SD rat was sacrificed and its abdominal hair was removed. Subsequently, its abdominal skin was bluntly dissected and subcutaneous fat was removed mechanically. The obtained rat skin was washed with physiological saline, and stored at −20° C. until use. The rat skin was thawed before use and washed with physiological saline.

(26) A modified Franz diffusion cell was used as the device of this experiment, in which the upper cell that served as a donor cell was a tube of 1.6 cm internal diameter, and the lower cell that served as a receptor cell was a stoppered conical flask. 100 ml of physiological saline was added to the receptor cell as receiving liquid; and the rat skin was fixed at the lower end of the donor cell with the side of stratum corneum upward. The cream was uniformly applied to the stratum corneum, followed by filling 10 ml of physiological saline into the donor cell. Afterwards, the donor cell was fixed on the receptor cell after being sealed. An agitator was placed in the receptor cell and the side of the skin dermis fully contacted with the receiving liquid, ensuring that no air bubble existed. Finally, that whole system was placed on a heated magnetic stirrer and stirred at 37° C. at a speed of 300 r/m in. The effective diffusion area of the device was 2.0 cm.sup.2. The liquid in the receptor cell was completely discharged at 3, 4, 5, 6, 7, 8, 9, and 10 hours respectively, followed by adding the blank receiving liquid thereto. The receiving liquid obtained at each time point was filtered through a 0.45 μm filter, and the amount of protein diffused in the receiving liquid was calculated using a standard curve, and the percentage of cumulative diffusion was determined as compared with the total protein amount.

(27) In an in vitro drug release test, it is generally believed that the process of a drug passing through skin is a passive diffusion process, which is commonly described by Fick's law of diffusion. The skin is regarded as a homogeneous membrane and when the drug diffuses through the skin to reach a steady state, the steady-state permeation rate is expressed by the formula:
J.sub.s=(dQt/S)/dt=P.sub.s(C.sub.d−C.sub.i)/s

(28) In the formula, J.sub.s: drug permeation rate, μg.Math.cm.sup.−2.Math.h.sup.−1; S: effective diffusion area (cm.sup.2); T: time (h); P.sub.s: permeability coefficient; C.sub.d: concentration of the drug in the donor cell (μg).

(29) However, in this test, the concentration of the drug in the donor cell was far greater than that in the receptor cell, so the above formula had been rewritten as follows:
J.sub.s=(dQt/S)/dt=P.sub.sC.sub.d.

(30) The sampling time was taken as the horizontal coordinate and the percentage of cumulative diffusion as the vertical coordinate, and a sampling time-percentage of cumulative diffusion curve was plotted.

(31) Results:

(32) The cream was white, smooth and even, and the base of it was W/O. The various cytokines and proteins comprised in the composite additive were dissolved in the base completely by the emulsification reaction between stearic acid and triethanolamine. In addition, the obtained cream had a stable quality and no stratification was observed in the centrifugal test, heat resistance test and cold resistance test. However, the cream is not recommended to expose to high heat given that most of the active ingredients in the composite additive were proteins that can be destroyed easily by high temperature. It was found that the cream containing the composite additive had a good permeation performance in vitro and could function through the skin. The results were shown in FIG. 2.

EXAMPLE 3: OBSERVATION OF THERAPEUTIC EFFECT OF THE COMPOSITE ADDITIVE ON MOSQUITO BITES

(33) 1. Experimental Material: The Composite Additive Prepared in Example 1.

(34) 2. Diagnostic Criteria for Bites: All Cases

(35) (1) are bit by mosquitoes or other insects; and

(36) (2) feel intense local itching after being bitten.

(37) 3. Criteria for Therapeutic Efficacy

(38) Cured: systemic and local symptoms disappear, and symptoms such as skin redness and swelling, fever, pain and itching subside.

(39) Effective: systemic and local symptoms are relieved and swelling subsides.

(40) Ineffective: systemic and local symptoms are not controlled or even aggravated.

(41) 4. Experimental Method

(42) 50 patients with mosquito bites were selected without age or sex restrictions. Upon the skin was bit by a mosquito, the composite additive was evenly applied to the red and swollen area twice a day. The dosage applied was adjusted according to the size of the area and therapeutic effect was observed.

(43) 5. Therapeutic Effect (Shown by Therapeutic Efficacy)

(44) It was observed that 23 cases were cured, and the composite additive showed effective in 25 cases while ineffective in 2 cases. The overall effective rate was 96%.

EXAMPLE 4: OBSERVATION OF COSMETIC AND REPAIR EFFECTS OF THE COMPOSITE ADDITIVE ON SKIN

(45) 1. Experimental Material: The Composite Additive Prepared in Example 1.

(46) 2. Criteria for Therapeutic Efficacy (0-10 Scores)

(47) Unobvious effect: 0-3 scores;

(48) General effect: 4-6 scores;

(49) Remarkable effect: 7-10 scores.

(50) 3. Experimental Method:

(51) 60 subjects were selected without age or sex restrictions, and then randomly divided into experimental group and placebo group. As for the experimental group: every day the subjects applied the composite additive of the present invention onto their face after cleaning the face in the morning and evening, with continue application for 30 days. As for the placebo group: every day the subjects applied pure water onto their face after cleaning the face in the morning and evening, with continue application for 30 days.

(52) 4. Therapeutic Effect (Shown by Scores of the Therapeutic Efficacy)

(53) The experimental group: 8.0±0.8.

(54) The placebo group: 2.6±0.9.

(55) From the results it can be seen that the composite additive had significant cosmetic effect as highly appraised by the subjects.

(56) 5. Specific Example:

(57) Subject Cao was a female 50 years old, who had deep crow's feet, large pouches and obvious dark circles before test. After applying the composite additive of the present invention, she found the crow's feet became lighter, the pouches smaller and the dark circles less obvious.

(58) The above description for the embodiments of the present invention is not intended to limit the present invention, and those skilled in the art can make various changes and variations according to the present invention, which are within the protection scope of the present invention without departing from the spirit of the same.