1. A preparation method of an embryonic stem cell exosome for skin aging resistance is characterized by comprising the following steps:

s1: inoculating the embryonic stem cells to an amplification culture medium for culture;

s2: collecting an embryonic stem cell culture medium, centrifuging to remove cell debris, and filtering to remove large particles to obtain an embryonic stem cell culture supernatant;

s3: concentrating the culture supernatant of the embryonic stem cells by using a tangential flow ultrafiltration membrane to obtain an exosome concentrated solution;

s4: and (4) carrying out column treatment on the exosome concentrated solution to remove impure proteins to obtain exosome suspension.

2. The method for preparing the culture extract of embryonic stem cells for skin aging prevention according to claim 1, wherein the culture extract of embryonic stem cells for skin aging prevention comprises: when the S1 is used for culturing the embryonic stem cells, the cell culture plate is coated by matrigel.

3. The method for preparing an exosome for embryonic stem cells for skin aging according to claim 1, which comprises: and collecting stem cell culture supernatant stably cultured for 2 days in the step S2 for extraction, and filtering the stem cell culture supernatant by using 0.45 mu m and 0.22 mu m filter membranes in sequence in the concentration process of the cell culture supernatant.

4. The method for preparing an exosome for embryonic stem cells for skin aging according to claim 1, which comprises: in the step S3, the molecular weight of the substance intercepted by the ultrafiltration membrane is more than 5KD, and the concentration multiple of the supernatant is 10-20 times.

5. The method for preparing an exosome for embryonic stem cells for skin aging according to claim 1, which comprises: the exosome separation column used in the step S4 is a column of 35nm or more.

6. The method for using the exosome for dermal anti-aging embryonic stem cells according to any one of claims 1 to 5, comprising the steps of:

s01: performing skin detection on the skin of a subject to obtain a skin data report of the subject;

s02: injecting the skin corium layer of the testee by using the embryonic stem cell exosomes and matching with a basic water light needle;

s03: after 14 days, skin test is carried out again, and skin data reports of the subjects are obtained, and the skin states before and after use are compared.

Background

The exosome is a nano-scale micro vesicle secreted by cells, has the diameter of about 30-150nm, has a lipid bilayer membrane structure and is responsible for substance transportation and information transmission among the cells. The function of exosomes depends on the cell type from which they are derived, and they can participate in aspects such as immune response, antigen presentation, cell migration, cell differentiation, tumor invasion, etc.

Embryonic Stem Cells (ESCs) have the characteristics of unlimited proliferation, self-renewal and multidirectional differentiation in vitro culture, can differentiate into any cell of three germ layers, have the capacity of developing into various tissues, and participate in the formation of partial tissues. The exosomes of the ESCs contain factors, transcription factors, mRNA, microRNA and the like related to pluripotency, show stronger functions than exosomes of adult tissue stem cells, can inhibit the cell aging process, change the epigenetic characteristics of target cells, reverse effector cells to a low differentiation state, play a role similar to tissue stem cells, such as the functions of repairing blood vessels, inhibiting inflammation, promoting proliferation and differentiation of the tissue stem cells and the like, and play an important role in injury repair and tissue regeneration.

Most of cosmetic preparations on the market have the problems of single active ingredient, low individual pertinence, poor product effect, serious product homogenization and the like. The embryonic stem cell exosome can provide various nutrient and substance information required by cell growth and differentiation, can quickly activate a human body repair system, and can carry out intelligent repair according to different skin problems. At present, exosomes for skin repair are mainly derived from umbilical cords, bone marrow and adipose-derived mesenchymal stem cells, the quality is not easy to control in the cell culture process, and the embryonic stem cell exosomes have higher biological activity and batch consistency, are stable in quality and are more suitable for large-scale production.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a preparation method of an embryonic stem cell exosome for skin aging, and solves the problems in the background art.

In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation method of an embryonic stem cell exosome for skin aging resistance comprises the following steps:

s1: inoculating the embryonic stem cells to an amplification culture medium for culture;

s2: collecting an embryonic stem cell culture medium, centrifuging to remove cell debris, and filtering to remove large particles to obtain an embryonic stem cell culture supernatant;

s3: concentrating the culture supernatant of the embryonic stem cells by using a tangential flow ultrafiltration membrane to obtain an exosome concentrated solution;

s4: and (4) carrying out column treatment on the exosome concentrated solution to remove impure proteins to obtain exosome suspension.

Preferably, when the embryonic stem cells are cultured in S1, the cell culture plate is coated with matrigel.

Preferably, the stem cell culture supernatant stably cultured for 2 days is collected and extracted in the step S2, and the cell culture supernatant is filtered by using 0.45 μm and 0.22 μm filter membranes in sequence during the concentration process to obtain a concentrated solution.

Preferably, the molecular weight of the substance intercepted by the ultrafiltration membrane in the step S3 is more than 5KD, and the concentration multiple of the supernatant is 10-20 times.

Preferably, the exosome-separating column used in the S4 step is a column of 35nm or more, and is capable of filtering heteroproteins of 35nm or less.

An application method of the embryonic stem cell exosome for skin aging resistance comprises the following steps:

s01: performing skin detection on the skin of a subject to obtain a skin data report of the subject;

s02: injecting the skin corium layer of the testee by using the embryonic stem cell exosomes and matching with a basic water light needle;

s03: skin tests were performed 14 days later to obtain skin data reports of the subjects, and skin conditions before and after use were compared.

The invention provides a preparation method of an embryonic stem cell exosome for skin aging resistance, which has the following advantages:

1. according to the preparation method of the embryonic stem cell exosome for skin aging resistance, human embryonic stem cells are preferably selected as the source of the exosome, and compared with the adult tissue stem cell exosome, the preparation method is more stable in source, stronger in function and capable of remarkably relieving skin aging;

2. according to the preparation method of the skin anti-aging embryonic stem cell exosome, the embryonic stem cells are cultured by adopting a serum-free culture medium, so that the preparation method is safe and reliable, and immune rejection reaction can not be caused like a traditional serum culture method;

3. according to the preparation method of the embryonic stem cell exosome for skin aging resistance, the embryonic stem cell exosome is separated and purified by a precipitation method, so that the purification efficiency is high, and the preparation method is suitable for large-scale production;

4. the prepared embryonic stem cell exosome can be used as a cosmetic raw material, and can be matched with various cosmetics to produce essence, skin moistening cream and other cosmetics according to the requirements of different cosmetics;

5. the whole process of the prepared embryonic stem cell exosome is carried out in a clean laboratory, and the prepared embryonic stem cell exosome can be used subcutaneously and used for a water light needle, a needle roller and the like.

Drawings

FIG. 1 is a transmission electron micrograph of embryonic stem cell exosomes;

FIG. 2 is a graph showing the distribution of the particle size of exosomes of embryonic stem cells;

FIG. 3 shows the expression of specific marker proteins of exosomes of embryonic stem cells;

FIG. 4 is a graph showing the improvement of facial skin before and after the use of the exosomes of embryonic stem cells by 10 persons of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

The invention provides a technical scheme that: a preparation method of an embryonic stem cell exosome for skin aging resistance comprises the following steps:

1. culturing the embryonic stem cells: spreading a layer of embryonic stem cell matrigel in a culture dish, transferring embryonic stem cells into the culture dish, adding a serum-free culture medium, culturing in an incubator (37 ℃, 5% CO 2 and saturated humidity), and collecting culture medium supernatant changed every day.

2. Cell culture supernatant pretreatment: embryonic stem cell culture supernatant (fresh or re-warmed at-20 ℃) was taken and centrifuged at 3000g for 15min to remove dead cells and debris.

3. Filtering to remove large particles: filtering the supernatant of step 3 by using 0.45 μm and 0.22 μm aqueous membranes, and collecting the filtered cell supernatant.

4. Tangential flow ultrafiltration concentration of cell supernatant:

1) putting a liquid inlet/return pipeline into the cell supernatant prepared in the step 3, putting a filtering pipeline into a 1L waste liquid bottle, starting a peristaltic pump and regulating the speed until the pressure indicates 2.5bar, and continuously circulating and concentrating until about 10-15 ml of concentrated solution is left;

2) the circulation speed is reduced to 20-40ml/min and the circulation system is continued for 1-2min to increase the sample recovery rate.

3) And taking out the liquid inlet pipe, pumping the residual samples in the system to a sample bottle, adding about 10ml of DPBS into the liquid inlet pipe, cleaning and pumping into the sample bottle.

5.0.22 μm membrane filtration: the exosome concentrate was filtered using millipore 0.22 μm filters.

6. Purifying protein by column chromatography: washing qEV separation column with 70ml DPBS, adding 10ml exosome suspension immediately after the washing liquid is finished, adding 10ml DPBS immediately until no liquid drops on the lower part, and discarding the dropped 20ml liquid; the lower part is provided with an exosome collecting bottle, the upper part is provided with 20ml of DPBS, and 20ml of exosome is collected until no more exosome flows out. Changing waste liquid collecting bottle, adding 120ml DPBS to wash the column, loading the exosome concentrated solution obtained in the step 5 again, and collecting by the same method.

7. The collected exosome suspensions were combined, 1/20 volumes of DPBS were added, and the mixture was filtered through a 0.22 μm filter to obtain exosome suspensions, which were stored in aliquots at-80 ℃.

Example two

The invention provides a technical scheme that: a method for identifying an embryonic stem cell exosome for skin aging resistance comprises the following steps:

1. transmission Electron Microscopy (TEM) observation of exosome morphology: fixing a sample-carrying copper net (with the aperture of 2nm) on a bracket, dripping 20 mu L of sample on the copper net, standing at room temperature for 3 minutes, sucking the liquid on one side of the copper net by using filter paper, and dripping 30 mu L of 3% phosphotungstic acid solution to carry out negative dyeing on the sample (room temperature for 5 minutes). The negative staining solution was removed by suction with filter paper, and the copper mesh was transferred to a transmission electron microscope to observe the exosome morphology, as shown in fig. 1.

2. Nanoparticle analysis system (iZon qNano, New Zealand) detects the particle size and concentration of exosomes: according to the operation instruction, the parameters of the instrument are adjusted, the Nanopore (NP100) is arranged below the sample adding hole, the Stretch is adjusted to 43cm, and 40 mu L PBS is added into the sample adding hole, so that the current is stabilized in the range of 100-120 nA. PBS was aspirated off, and 40 μ L1: 100 dilution of CPC100 standard (particle size 70nm), particle number and concentration were measured and standard curves were obtained by software. The standards were aspirated off, washed 3 times with PBS, 40. mu.L of a 1:1000 diluted sample to be tested was added, the number of particles and concentration were determined, and the measurement was repeated 3 times. And (5) carrying out data analysis through software to obtain an analysis report. The results show particle sizes in the range of 50-150nm, see FIG. 2.

Western blot assay for expression of exosome-specific surface markers CD9, CD63 and HSP 70: extracting total protein of the exosome, detecting the concentration of the protein of a sample by a BCA protein analysis kit, preparing 10% separation gel by gel preparation, performing electrophoresis, transferring a membrane, sealing and antibody incubation, and observing the strip development condition by a chemiluminescence imaging analyzer. As a result, the extracted exosomes all expressed the specific surface markers CD9, CD63 and HSP 70. See fig. 3.

EXAMPLE III

Referring to fig. 4, an application method of the embryonic stem cell exosome for skin aging includes the following steps:

s01: performing skin detection on the skin of a subject to obtain a skin data report of the subject;

s02: injecting the skin corium layer of the testee by using the embryonic stem cell exosomes and matching with a basic water light needle;

s03: skin tests were performed again 14 days after injection to obtain skin data reports of the subjects, and skin conditions before and after use were compared.

As will be understood by those skilled in the art:

selecting 10 subjects, detecting the skin of the subjects (CBS-807 skin analysis system) to detect the elasticity, pore size, moisture, wrinkles and skin color of the skin to obtain skin reports of the subjects, trying the obtained embryonic stem cell exosomes by the subjects, mixing the embryonic stem cell exosomes and basic water in a ratio of 1:1 by adopting a water light needle injection mode, injecting the mixture into a skin corium layer, and detecting the skin again after 14 days. The results are shown in FIG. 4.

As can be seen from fig. 4, the embryonic stem cell exosomes provided by the present invention have good anti-aging and cosmetic effects, can effectively improve the problems of facial skin elasticity, moisture, wrinkles, spots, large pores, etc., and have a repairing effect on facial skin.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.