阅读说明：本技术 一种水母活性蛋白及其制备方法和应用 (Jellyfish active protein and preparation method and application thereof ) 是由 阮仁全 王辉 徐蕾 丁卫平 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种水母活性蛋白的制备方法,包括如下步骤：步骤一、胶原蛋白或胶原蛋白海绵的制备：从水母中提取胶原蛋白或胶原蛋白海绵；步骤二、将胶原蛋白或胶原蛋白海绵溶解于高浓度的尿素溶液中获得。本发明还公开了一种水母活性蛋白及其应用。本发明在提取出胶原蛋白海绵之后加入高浓度尿素变性,一方面可分离掉共沉淀下来的不可溶性的组织或细胞碎片和脂类物质。(The invention discloses a preparation method of jellyfish active protein, which comprises the following steps: step one, preparing collagen or collagen sponge: extracting collagen or collagen sponge from jellyfish; and step two, dissolving the collagen or the collagen sponge in a high-concentration urea solution to obtain the collagen or the collagen sponge. The invention also discloses an aequorin active protein and application thereof. According to the invention, high-concentration urea is added for denaturation after the collagen sponge is extracted, so that insoluble tissues or cell fragments and lipid substances which are precipitated in a coprecipitation mode can be separated.)

1. A preparation method of jellyfish active protein is characterized by comprising the following steps:

step one, preparing collagen or collagen sponge: extracting collagen or collagen sponge from jellyfish;

and step two, dissolving the collagen or the collagen sponge in a high-concentration urea solution to obtain the collagen or the collagen sponge.

2. The method for producing an jellyfish-active protein according to claim 1, wherein the concentration of the urea solution having a high concentration is 7mol/L to 9 mol/L.

3. The method for preparing jellyfish active protein according to claim 1, wherein the second step is to add a high concentration urea solution into collagen or collagen sponge, stir the solution, and centrifuge the solution after the solution is sufficiently dissolved; and finally, collecting supernatant solution to prepare the jellyfish active protein.

4. The method for preparing jellyfish active protein according to claim 1, wherein the preparation of collagen or collagen sponge in the first step comprises the steps of:

A. desalting the jellyfish;

B. removing lipid substances: adding a lipase, soaking, and washing to remove the lipase;

C. dissolving urea to remove soluble impurities: adding a low-concentration urea solution to immerse the tissue block, stirring at low speed at room temperature to dissolve impurities, and washing the tissue block with pure water to remove urea;

D. c, adding citric acid, homogenizing the material after impurity removal in the step C, transferring, and then adding a pepsin solution for enzyme digestion;

E. after digestion, centrifugally separating undigested tissue blocks, neutralizing separated supernatant to be neutral by using alkaline solution, centrifuging for 20 minutes, and collecting collagen gel precipitate;

F. dissolving collagen with citric acid, adjusting the supernatant to neutrality, and centrifuging to collect gel precipitate; repeating the above steps for more than or equal to N times, wherein N is a natural number; and then, putting the collagen sponge into a freeze dryer for freeze drying to prepare the collagen sponge.

5. The method for producing an jellyfish-active protein according to claim 4, wherein the concentration of the urea solution in the step C is 0.5mol/L to 2 mol/L.

6. The method for preparing jellyfish active protein according to claim 4, wherein the concentration of citric acid in step D is 0.1 to 1.0 mol/L; the concentration of the pepsin is 2-20 mg/g.

7. The method for producing jellyfish-activated protein according to claim 4, wherein the alkali solution in the step E is sodium hydroxide or potassium hydroxide, and the supernatant is separated by neutralization with the alkali solution to a pH of 5.0 to 7.0.

8. The method for producing jellyfish-active protein according to claim 4, wherein the citric acid in step F is used in an amount of 5 to 10 times the precipitation volume and in a concentration of 0.01 to 0.1 mol/L.

9. An aequorin active protein produced by the production method according to any one of claims 1 to 8.

10. Use of an aequorin according to claim 9 for promoting adherent growth of skin cells, promoting migration of skin cells, repairing skin barrier, and improving skin moisturization.

Technical Field

The invention relates to the technical field of preparation of jellyfish active protein, in particular to jellyfish active protein and a preparation method and application thereof.

Background

Collagen can be extracted from various organisms. Preferred sources of collagen for tissue engineering applications are bovine skin, tendon and porcine skin. However, bovine-derived collagen carries the risk of infection by diseases such as bovine spongiform encephalopathy (commonly known as mad cow disease). Furthermore, mammalian collagen, especially of porcine origin, is increasingly rejected for religious reasons. Marine organisms are natural sources of collagen replacement and are presumed to be safer than mammals. Another attractive marine source for collagen extraction is jellyfish. The increase of the population of jellyfish worldwide poses a significant problem in the ecological environment, and its potential application in tissue engineering outside the food and pharmaceutical industries may contribute to reducing its development. Collagen content exceeds 60%, and jellyfishes are likely to be an important source of collagen in biomedical applications.

For the isolation of native tissue collagen, the two most commonly used methods at present are acid hydrolysis and pepsin extraction, respectively. There are also types of collagen type I extracted by urea, but this method simply uses collagen of low quality. In the usual separation procedures, there are also some drawbacks that cannot be ignored: acid treatment can cause partial hydrolysis during extraction, which is largely uncontrolled, and the collagen produced is a mixture of collagen peptides and intact collagen that have undergone varying degrees of hydrolysis/degradation; the extracted collagen is also subject to uncontrolled degradation during pepsin treatment and extraction, since the tissue itself cannot be completely removed by washing the tissue before extraction. In addition, the denaturation temperature of marine collagen is low, and usually in the environment of more than 20 ℃, three strands of collagen melt and are gradually hydrolyzed into polypeptide fragments with different sizes. Therefore, it is difficult to control the quality of jellyfish collagen in an aqueous solution. Conventional collagen can only be used in lyophilized form and stored for a long period of time.

Disclosure of Invention

According to the invention, researches show that the collagen with specific biological activity and stable thermodynamics can be obtained by optimizing a pepsin extraction method, namely dissolving the extracted collagen in urea with a certain concentration. The extracted aequorin still has various biological activities, such as promoting adherent growth and migration of skin cells, repairing skin barriers, improving skin moisture retention and the like. Therefore, the first object of the present invention is to provide a method for preparing jellyfish active protein. The second purpose of the invention is to provide an aequorin active protein. The third purpose of the invention is to provide an application of the jellyfish active protein.

In order to achieve the purpose, the invention adopts the following technical scheme:

as a first aspect of the present invention, a method for preparing an jellyfish active protein, comprising the steps of:

step one, preparing collagen or collagen sponge: extracting collagen or collagen sponge from jellyfish;

and step two, dissolving the collagen or the collagen sponge in a high-concentration urea solution to obtain the collagen or the collagen sponge.

According to the invention, the concentration of the high-concentration urea solution is 7-9 mol/L.

Preferably, the concentration of the high-concentration urea solution is 8 mol/L.

According to the invention, step two, adding high-concentration urea solution into collagen or collagen sponge to fix the volume, stirring, fully dissolving, and centrifuging; and finally, collecting supernatant solution to prepare protein solution (namely jellyfish active protein), and storing at normal temperature.

According to the invention, the centrifugation is carried out for 20min at a speed of 17,000 g.

According to the present invention, the preparation of collagen or collagen sponge in the first step comprises the following steps:

A. desalting the jellyfish: cutting jellyfish into small pieces, soaking in water, and removing salt;

B. removing lipid substances: adding a lipase, soaking, and washing to remove the lipase;

C. dissolving urea to remove soluble impurities: adding a low-concentration urea solution to immerse the tissue block, stirring at low speed at room temperature to dissolve impurities, and washing the tissue block with pure water to remove urea;

D. adding citric acid to homogenize the material after impurity removal of C, transferring to a stirring tank, adding pepsin solution to carry out enzymatic digestion, and keeping the mixture at the temperature of 16 ℃ for 12 hours with slow stirring digestion;

E. after digestion, centrifugally separating undigested tissue blocks, neutralizing separated supernatant to be neutral by using alkaline solution, centrifuging for 20 minutes, and collecting collagen gel precipitate;

F. dissolving collagen with citric acid, adjusting the supernatant to neutrality, and centrifuging to collect gel precipitate; freeze-drying in a freeze-drying machine to obtain collagen sponge, wherein the steps from citric acid dissolution to centrifugation and gel precipitation collection are repeated more than or equal to N times, wherein N is a natural number. It should be noted that, in the operation, the dissolution to neutralization step is repeated a specific number of times according to the purity of the collagen to be obtained.

According to the invention, B is soaked for 4h at 25 ℃.

According to the invention, the concentration of the urea solution of C is between 0.5mol/L and 2 mol/L.

According to the invention, the concentration of the urea solution C is 1-2 mol/L, and the low-speed stirring time at room temperature is 2-4 h.

According to the invention, the urea solution of C is 2 mol/L.

According to the invention, the concentration of the citric acid D is 0.1-1.0 mol/L; the concentration of the pepsin is 2-20 mg/g.

According to the invention, E separates the undigested tissue mass by centrifugation at 17,000g for 30 minutes.

According to the invention, the alkali liquor of E is sodium hydroxide or potassium hydroxide, and the supernatant is neutralized and separated by the alkali liquor until the pH value is 5.0-7.0.

According to the invention, the citric acid of the F is used in an amount of 5-10 times of the precipitation volume, and the concentration is 0.01-0.1 mol/L.

According to the invention, F, collagen is dissolved by citric acid, then the supernatant is adjusted to be neutral, the gel precipitate is collected by continuous centrifugation, and the steps from dissolving to neutralizing are repeated one or more times.

As a second aspect of the present invention, an aequorin active protein is prepared by the above-described method.

As a third invention of the invention, the jellyfish active protein is applied to promoting adherent growth of skin cells, promoting migration of skin cells, repairing skin barriers, improving skin moisture retention and the like.

The preparation method of the jellyfish active protein has the beneficial effects that:

1. before the enzymolysis of the pepsin, a sample is soaked by urea with a certain concentration, soluble protein or polypeptide components are extracted, the enzyme in the tissue is inactivated as much as possible, and the nonspecific degradation is prevented.

2. After the collagen sponge is extracted, high-concentration urea is added for denaturation, so that insoluble tissues or cell fragments and lipid substances which are precipitated in a coprecipitation way can be separated. The collagen is stable in protein chain in urea solution, is not easy to degrade at normal temperature, has a structure similar to recombinant collagen from genetic engineering sources, does not have a triple helix structure, but the extracted aequorin still has various biological activities, such as promoting adherent growth and migration of skin cells, repairing skin barriers, improving skin moisture retention and other biological activities.

Drawings

FIG. 1 shows collagen obtained by different extraction methods.

FIG. 2 is a graph of the thermal stability of parent collagen at different temperatures.

FIG. 3 shows the adherence of jellyfish-active protein cells.

FIG. 4 shows that aequorin promotes skin cell migration.

Figure 5 shows that jellyfish active protein increases skin moisturization.

Figure 6 shows that jellyfish active protein reduces skin moisture loss.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.

The preparation process comprises the following steps: rinsing, slicing, degreasing, soaking in urea, washing, carrying out pepsin enzymolysis, centrifuging to collect supernatant, neutralizing precipitate, centrifuging to collect precipitate, carrying out acid washing for 2 times, freeze-drying, and dissolving in urea.

Example 1 Urea Pepsin Process

1. Soaking a sample with a urea solution

Jellyfish skin (Rhopilema esculentum, jellyfish) was purchased from the aquatic market. 10kg of the pickled jellyfishes were cut into small pieces, washed with tap water, and then immersed in pure water for several hours to remove salt. 1 g of a lipase (purchased from Shanghai, Ltd.) was added, and after soaking at 25 ℃ for 4 hours, the lipase was washed off. The tissue block is divided into 5 parts, each of which is 2kg, 4 liters of urea solution with the concentration of 1mol/L, 2mol/L, 3mol/L, 4mol/L and 5mol/L are respectively added, the mixture is kept at room temperature and stirred at low speed for 2 hours, urea is required to be removed in order to ensure the subsequent enzymatic reaction, and at the moment, the tissue block is filtered by a filter cloth. The results show that tissue blocks melt to different degrees after being soaked by urea of more than 3mol/L, and the tissue loss is more when the urea is washed. The supernatant was clear after 1mol/L urea immersion, and was light yellow after 2mol/L urea immersion, indicating that 2mol/L urea could solubilize and separate non-collagen components in the tissue, but collagen was not solubilized (see lane 4 of SDS-PAGE electrophoresis FIG. 1). This will contribute to the quality of the collagen. Then soaking the fabric by using 2mol/L urea.

2. Preparation of collagen sponge

Jellyfish skin (Rhopilema esculentum, jellyfish) was purchased from the aquatic market. 10kg of the salted jellyfish was cut into small pieces, washed several times with tap water, and then soaked in pure water for several hours until the salinity was less than 0.01. 1 g of a lipase (purchased from Shanghai, Ltd.) was added, and after soaking at 25 ℃ for 4 hours, the lipase was washed off. 20L of a 2mol/L urea solution was added, and after keeping stirring at room temperature for 2 hours at a low speed, the tissue mass was rinsed with pure water to remove urea. The following steps are all carried out at a temperature below 20 ℃. Adding 15L 0.5mol/L citric acid to homogenize the material, transferring to a stirring tank, adding 10mg/g pepsin (from Shanghai biological organism) solution for enzyme digestion, and keeping at 16 deg.C for 12 hr with slow stirring. After completion of digestion, the undigested tissue mass was separated by centrifugation at 17,000g for 30 minutes, the separated supernatant was neutralized with sodium hydroxide to pH 7.0, and centrifuged at 17,000g for 20 minutes to collect the collagen gel precipitate. Then dissolving collagen by 0.05mol/L citric acid solution with 8 times of precipitation volume, adjusting the supernatant to be neutral, and continuing to centrifugally collect gel precipitate. The steps from citric acid dissolution to centrifugation to collect the gel pellet were repeated. And then putting the collagen sponge into a freeze dryer for freeze drying to prepare the collagen sponge. It should be noted that, in the operation, the specific number of repetitions of the step of dissolving to the step of collecting the gel precipitate by centrifugation is determined according to the purity of the collagen to be obtained.

3. And (3) determining the concentration of the urea solution, weighing 5 parts of collagen sponge of 1 g respectively, adding 0, 2, 4, 6 and 8mol/L urea solution respectively to a constant volume of 100mL, stirring, fully dissolving, and centrifuging at a rotating speed of 17,000g for 20 minutes. Finally, collecting supernatant solution, preparing 10mg/mL protein solution, preserving the temperature at 16 ℃ for 24 hours, and detecting the protein by SDS-PAGE. The results show that all collagen sponges can be dissolved, the collagen is in a gel state after the urea-free aqueous solution is dissolved, and the viscosity of the urea-containing collagen is remarkably reduced to be in a low-viscosity solution state, which shows that the urea opens the triple-helical structure of the collagen. SDS-PAGE shows that the collagen in 2mol/L, 4mol/L and 6mol/L urea is degraded to different degrees. Collagen in 8mol/L urea retains the intact a chain. Subsequently, 8mol/L urea was used to dissolve the sponge, thereby inhibiting proteolysis.

4. The preparation of the jellyfish active protein comprises the steps of weighing 1 g of collagen sponge, adding 8mol/L of urea solution, fixing the volume to 100mL, stirring, fully dissolving, and centrifuging at the rotating speed of 17,000g for 20 minutes. And finally, collecting supernatant solution, preparing 10mg/mL protein solution, and storing at normal temperature.

Example 2: pepsin process

10kg of the salted jellyfish was cut into small pieces, washed several times with tap water, and then soaked in pure water for several hours until the salinity was less than 0.01. Adding 1 g of lipase, soaking at 25 ℃ for 4 hours, and washing off the lipase. The following steps are all carried out at a temperature below 20 ℃. Adding 0.5M citric acid to homogenize the material, transferring to a stirring tank, adding 10mg/g pepsin (purchased from Shanghai biological products) solution for enzymatic digestion, and keeping the temperature at 16 ℃ for 12 hours with slow stirring. After completion of digestion, the undigested tissue mass was separated by centrifugation at 17,000g for 30 minutes, the separated supernatant was neutralized with sodium hydroxide to pH 7.0, and centrifuged at 17,000g for 20 minutes to collect the collagen gel precipitate. Then 0.05% citric acid is used to dissolve collagen, then the supernatant is adjusted to be neutral, the gel precipitate is collected by continuous centrifugation, and the steps from dissolving to neutralizing are repeated twice. And swelling the washed collagen with water, and freeze-drying in a freeze dryer to obtain the collagen sponge. Weighing 1 g of collagen sponge, adding 0.05% sodium citrate solution to a constant volume of 100mL, fully swelling the collagen sponge to prepare 10mg/mL collagen gel, and storing at 4 ℃.

Example 3: acid extraction process

10kg of the salted jellyfish was cut into small pieces, washed several times with tap water, and then soaked in pure water for several hours until the salinity was less than 0.01. Adding 1 g of lipase, soaking at 25 ℃ for 4 hours, and washing off the lipase. The following steps are all carried out at a temperature below 20 ℃. 0.5M citric acid was added to homogenize the mass and transferred to a stirred tank where it was kept at 16 ℃ for 12 hours with slow stirring. After completion of digestion, the undigested tissue mass was separated by centrifugation at 17,000g for 30 minutes, the separated supernatant was neutralized with sodium hydroxide to pH 7.0, and centrifuged at 17,000g for 20 minutes to collect the collagen gel precipitate. Then 0.05% citric acid is used to dissolve collagen, then the supernatant is adjusted to be neutral, the gel precipitate is collected by continuous centrifugation, and the steps from dissolving to neutralizing are repeated twice. And swelling the washed collagen with water, and freeze-drying in a freeze dryer to obtain the collagen sponge. Weighing 1 g of collagen sponge, adding 0.05% sodium citrate solution to a constant volume of 100mL, fully swelling the collagen sponge to prepare 10mg/mL collagen gel, and storing at 4 ℃.

Example 4: process for extracting high-concentration urea

10kg of the salted jellyfish was cut into small pieces, washed several times with tap water, and then soaked in pure water for several hours until the salinity was less than 0.01. Adding 1 g of lipase, soaking at 25 ℃ for 4 hours, and washing off the lipase. The following steps are all carried out at a temperature below 20 ℃. Adding 8M urea to homogenize the material, transferring the homogenized material to a stirring tank, and keeping the temperature of 16 ℃ for digesting for 12 hours with slow stirring. After digestion, the undigested tissue mass was separated by centrifugation at 17,000g for 30 minutes, sodium chloride was added to a final concentration of 10%, the protein was precipitated, and the collagen precipitate was collected by centrifugation at 17,000g for 20 minutes. Dissolving collagen with 0.05% citric acid, precipitating with sodium chloride, centrifuging, collecting precipitate, and repeating the steps from dissolving to precipitating twice. And swelling the washed collagen with water, and freeze-drying in a freeze dryer to obtain the collagen sponge. Weighing 1 g of collagen sponge, adding 0.05% sodium citrate solution to a constant volume of 100mL, fully swelling the collagen sponge to prepare 10mg/mL collagen gel, and storing at 4 ℃.

Example 5: urea pepsin process (urea-free washing)

Jellyfish skin (Rhopilema esculentum, jellyfish) was purchased from the aquatic market. 10kg of the salted jellyfish was cut into small pieces, washed several times with tap water, and then soaked in pure water for several hours until the salinity was less than 0.01. 1 g of a lipase (purchased from Shanghai, Ltd.) was added, and after soaking at 25 ℃ for 4 hours, the lipase was washed off. The following steps are all carried out at a temperature below 20 ℃. Adding 15L 0.5mol/L citric acid to homogenize the material, transferring to a stirring tank, adding 10mg/g pepsin (from Shanghai biological organism) solution for enzyme digestion, and keeping at 16 deg.C for 12 hr with slow stirring. After completion of digestion, the undigested tissue mass was separated by centrifugation at 17,000g for 30 minutes, the separated supernatant was neutralized with sodium hydroxide to pH 7.0, and centrifuged at 17,000g for 20 minutes to collect the collagen gel precipitate. And dissolving the collagen by using 0.05mol/L citric acid with the volume 8 times that of the precipitate, adjusting the supernatant to be neutral, and continuing to centrifugally collect gel precipitate. The steps from citric acid dissolution to centrifugation to collect the gel pellet were repeated. And then putting the collagen sponge into a freeze dryer for freeze drying to prepare the collagen sponge. It should be noted that, in the operation, the specific number of repetitions of the step of dissolving to the step of collecting the gel precipitate by centrifugation is determined according to the purity of the collagen to be obtained.

Weighing 1 g of collagen sponge, adding 8mol/L urea solution to a constant volume of 100mL, stirring, fully dissolving, and centrifuging at a rotating speed of 17,000g for 20 minutes. And finally, collecting supernatant solution, preparing 10mg/mL protein solution, and storing at normal temperature.

Example 6: SDS-PAGE electrophoretic experiments and yield calculation

The protein solutions prepared in examples 1 to 5 were subjected to SDS-PAGE electrophoresis.

8% SDS-PAGE gel is prepared, and the molecular weight and purity of the protein are detected by an electrophoresis method. The results are shown in FIG. 1.

The results show that:

the collagen extracted by the urea pepsin method of the embodiment 1 is a chain, accords with the characteristics of type I collagen, has the molecular weight of about 140KD, and is the same as the molecular weight extracted by the pepsin method of the embodiment 2. The urea pepsin method of example 1 extracted collagen with higher purity than the pepsin method.

Example 5 the sample not washed with 2mol/L urea was more heterogeneous (see lane 7 of FIG. 1). Therefore, some soluble proteins in the tissues can be removed during urea pretreatment, and the purity of subsequent products is ensured. Meanwhile, after the urea dissolves the collagen, part of undissolved impurities can be removed. Collagen extracted by using high-concentration urea alone has many impurities, low purity, deep pigment and heavy smell, and a high-quality product cannot be obtained.

The yield of extraction by the pepsin method and the urea pepsin method is higher than that of extraction by the acid extraction method. This is because the collagen extracted by acid has no terminal peptide cut off, has a large molecular weight, and is separated when primarily separating solid and liquid impurities.

Example 7: study on Heat stability of jellyfish active protein

The samples prepared in example 1 and example 2 were placed in an environment of 16 ℃, 37 ℃, 55 ℃ and 75 ℃ for 5 hours, respectively, and the thermal stability of collagen was examined. After the experiment, 40. mu.L of sample was added to 10 Xloading buffer and detected by SDS-PAGE electrophoresis. Marine collagen generally has a low denaturation temperature, and is easily denatured at normal temperature or high temperature to be hydrolyzed into polypeptides of different sizes. Although urea will melt the triple helix of collagen to form a single a-strand, urea is effective to keep the a-single strand from continuing to break into small fragments. The intact a chain plays an important role in maintaining certain biological functions of the protein. The results are shown in FIG. 2.

The results show that the collagen extracted by both examples is not degraded into small fragments in 16 ℃. After being placed in an environment at 37 ℃ for 5 hours, the total length of collagen extracted by pepsin begins to reduce, and the degradation ratio reaches 50%. The degradation ratio reaches 80 percent under the environment of 55 ℃. And the degradation rate is 100 percent under the environment of 75 ℃. Collagen dissolved in urea (example 1) showed thermal stability at different temperatures, and the full-length fragment was not cleaved.

Example 8: cell adherence assay

The sample extracted in example 1 was diluted at four ratios of 1:10(1mg/mL), 1:100(0.1mg/mL), 1:1000(0.01mg/mL), and 1:10000(0.001mg/mL), and 1% fibronectin (5. mu.g/mL final concentration, supplied by Meijian organism) was used as a positive control, 1% BSA (5. mu.g/mL final concentration, purchased from Shanghai Processary, Ltd.), and the sample to be tested was coated on a 96-well plate without TC treatment for 30 minutes, washed twice with PBS, and then blocked at 37 ℃ for 30 minutes by adding 1% BSA. Embryonic fibroblasts were added, incubated for 1 hour, the medium in the wells was gently aspirated, the nonadherent cells were gently rinsed with PBS, and the number of viable cells adherent to the bottom of the well plate was determined by CCD8 method, the results of which are shown in fig. 3.

The result shows that the aequorin can effectively promote the adhesion of fibroblasts, the optimal adhesion activity is shown at 0.1mg/mL, the adhesion number is reduced along with the increase of the concentration, a gel layer with a certain thickness is formed, and the cells are wrapped in the gel layer and do not precipitate to the bottom of a culture dish.

Example 9: cell migration assay

The collagen of triple helix is widely used for wound repair, not only because the collagen promotes the adherent growth of cells, but also because the collagen has the ability of promoting cell migration. To verify the biological activity of the extracted aequorin of example 1, the present inventors tested the ability of the extracted aequorin of example 1 to promote migration of epidermal-forming cells at concentrations of 0.01mg/mL (0.1%), 0.1mg/mL (1%), and 1mg/mL (10%), respectively. The results are shown in FIG. 4.

The results show that in the presence of 0.01mg/mL of the aequorin, the cells migrated to the center of the scratch after 24 hours of cell culture, and the degree of cell migration was about obvious with the increase of the concentration, indicating that the aequorin can promote the cell migration and has concentration dependence.

Example 10: skin moisturizing test

The jellyfish active protein sample extracted in example 1 was prepared into jellyfish collagen gel with a content of 5% by using 0.3% carbomer, and the control group was 0.3% carbomer and the blank group was pure water. In this experiment, 6 volunteers were recruited and the moisturizing effect of the samples was tested at the arms. The arm was cleaned, air dried, and a 5cm × 5cm area was drawn on the arm with a marker pen as a test frame. The tester enters the detection room to sit still for half an hour, and the environment of the detection room is controlled at the constant temperature of 25 ℃ and the constant humidity of 50 percent. Uniformly smearing about 0.2 g of each sample in a test frame, naturally drying the skin for 10 minutes, uniformly smearing the residual samples again by using clean fingers until the residual samples are completely absorbed, respectively testing the moisture content of the skin after 30min, 1h, 2h, 4h and 6h, and testing the moisture content of the skin by using a German CK (CK probe) instrument (probe) for testing the skin moisture retentionCM 825). The results are shown in FIG. 5.

The results show that the aequorin can effectively retain the moisture of the skin and maintain the moisture of the skin for a long time compared with the control group.

Example 11: repairing skin barriers

Transdermal water loss (TEWL) refers to water evaporating through the human stratum corneumIn general, it is used to evaluate the barrier function of the skin, the more intact the epidermal barrier, the lower the TEWL value. The integrity of the stratum corneum is an indicator of barrier strength or barrier water storage capacity and is evaluated by TEWL values determined by 6 consecutive tape peel tests. If the TEWL falls to a low value after the method test, the skin is proven to have good barrier integrity. The tester sits statically for half an hour in the detection room, and the environment of the detection room is controlled to be constant temperature of 25 ℃ and constant humidity of 50%. The instrument used was a German CK instrument (Probe)TM Hex). The experimental procedure in this example was as follows: at 0 hours, the baseline TEWL values were determined by 6 tape stripping operations on each cheek side. The TEWL values were determined 1 hour, 5 hours, 10 hours and 24 hours after application of the jellyfish-activated protein solution to the left face, respectively. The right face was blanked with saline as seen in fig. 6.

The measured value of 6 times of tape stripping tests shows that the TEWL value is obviously reduced relative to a control group after the jellyfish active protein is used for 24 hours, which indicates that the jellyfish active protein extracted in the invention effectively restores the skin barrier damage, reduces the skin moisture loss and improves the skin moisture-locking capacity.