CN109771452A - Application of the Pleurotus tuber-regium extract in preparation tumor - Google Patents
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Abstract
The invention proposes application of the Pleurotus tuber-regium extract in preparation tumor, experiments have shown that the Pleurotus tuber-regium effective component filtered out by mtt assay has anti-tumor activity, to the inhibiting rate of lung carcinoma cell 80% or more.The present invention also provides the preparation methods of the Pleurotus tuber-regium extract, this method is by studying its fermentation condition tetra- the most suitable cultivation temperature of Pleurotus tuber-regium, growth time, shaking speed and pH aspects, obtain optimum fermentation culture conditions, then further obtained hypha,hyphae is extracted using organic solvent, obtains the Pleurotus tuber-regium extract containing active constituent.This method is easy to operate, can be realized large-scale production and popularization.
Description
Technical field
The present invention relates to technical field of bioengineering, and in particular to a kind of Pleurotus tuber-regium extract is in preparation tumor
In application.
Background technique
Pleurotus tuber-regium (Pleurtus tuberregium) also known as core ear mushroom, sclerotium oyster mushroom, Poria cocos pick up the ears, pleurotus tuberregium (Franch.) Singer etc., is
It is grown on one kind rare edible and medicinal fungi of the torrid zone with subtropical zone.The structure of Pleurotus tuber-regium can be divided into mycelium and son is real
Body two parts, mycelium are present in Medium Culture, have the function of storage, decompose and transport.Fructification is present in outside matrix, tool
There is the edible function with breeding.Sclerotium is in irregular lumps, is similar to round or oblate spheroid, not of uniform size, and table
Face is mostly yellow-white, and minority is in light yellow, and crust is bronzing when mature, and close to white, body is light, matter is loose, can float on water for inside
There is graininess in face, and gas is micro-, lightly seasoned, and that chews has granular sensation, has microviscosity.Cap is shaped like funnel or cup-shaped, under smooth and center
Recessed, initial stage meat surface is smooth, and there is small calm shape scale at middle part, in canescence to bronzing.Since it wants growing environment
Ask harsh, natural growth cycle is long, therefore with the destruction of environment, the yield of Sclerotium of Pleurotus tuber regium is fewer and fewer, it is difficult to meet doctor
Extensive use on medicine and health care.
Pleurotus tuber-regium nature and flavor are sweet, warm, invigorating qi and benefiting blood, have strengthening by means of tonics, strengthening the spleen and stomach, reducing blood lipid, prevent and cure diseases, improve and be immunized
The effect of power and elimination lung's pollutant, while being also applied for artery sclerosis, coronary heart disease, hypertension and myasthenia gravis
Treatment, and also have more magical curative effect to chronic, anaphylaxis, the stupid cough of asthenic cold type, asthma.Furthermore the nutrition of Pleurotus tuber-regium is extremely
It is abundant, rich in nutritional ingredients such as amino acid, protein, cellulose, eukaryon polysaccharide and minerals.In country in Southeast Asia and China
Coastal area, Pleurotus tuber-regium main function is that strong tonic is eaten, while the Chinese medicine that being also simply can be relieving cough and asthma.Brave milk
The sclerotium of mushroom has extremely strong disease resistance, and finished product is placed in the environment of indoor seasoning, and the holding time is long, and matter is constant, worm
It does not eat into, germ, virus are not invaded, and mould does not enter, and pharmacological property effect is constant, is used as medicine splendid.
Currently, concentrating on polysaccharide to Sclerotium of Pleurotus tuber regium chemical composition analysis.Lina Zhang seminar respectively successively with water,
NaCl, NaOH separate 8 component TM1~TM8 from sclerotium.TM8 is alkali carries water-insoluble polysaccharide, with B- (1-3)-D-Glucose
For main chain, every 3 glycosyl units have one to be substituted on the position of C6.TM8 is divided into 10 fractions again, i.e. TM8=(1,2,3,
4,5,6,7,8,9 and 10)；Molecular weight ranges are 1017kDa~774kDa.In addition by water-soluble polysaccharide (WEP, Mw=22kDa)
It is divided into 3 components of Mw=14kDa, Mw=18kDa, Mw=34kDa.Kulicke W M's etc. studies have shown that polysaccharide it is disease-resistant
The many factors such as the height of the multiple biological activities such as malicious, antitumor, immunological regulation and the molecular weight of polysaccharide and structure are related.By
Sulfation and carboxymethylated Pleurotus tuber-regium polysaccharide derivates can imitate the activity of togavirus HSV22 with extraordinary inhibition
Fruit also possesses powerful oxidation resistance.However, to the research of Pleurotus tuber-regium active constituent antitumor action still in exploration.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
The purpose of the present invention is to provide application of the Pleurotus tuber-regium extract in preparation tumor.
To achieve the above object, technical scheme is as follows:
The present invention relates to application of the Pleurotus tuber-regium extract in preparation tumor.
It is by a effective amount of tumor chemotherapeutic drug and tiger above-mentioned the invention further relates to a kind of antineoplastic pharmaceutical compositions
Milk mushroom extract is active constituent, and the preparation that pharmaceutically acceptable auxiliary material is prepared is added.
Preferably, the tumour is lung cancer tumor.
Preferably, the Pleurotus tuber-regium extract is prepared by the following method to obtain: being added into Pleurotus tuber-regium mycelia organic molten
Agent is impregnated, and obtains filtrate after suction filtration, is dried in vacuo after the filtrate is concentrated by evaporation, is obtained the Pleurotus tuber-regium extract.
Preferably, the organic solvent is selected from least one of petroleum ether, ethyl acetate, n-butanol, ethyl alcohol, ether.
Preferably, the soaking time is 15~30h.
Preferably, dimethyl sulfoxide (DMSO) dissolution is added in Xiang Suoshu Pleurotus tuber-regium extract, is then used in silicagel column
The mixed solvent system of chloroform and methanol carries out gradient elution, obtains eluent.
Preferably, the volume ratio of the chloroform and methanol is 1:(1~9).
Preferably, the Pleurotus tuber-regium mycelia is obtained by fermentation culture method, the described method comprises the following steps:
(1) fluid nutrient medium is prepared, contains 150~250g/L of potato, 15~25g/ of glucose in the fluid nutrient medium
L, 0.3~0.8g/L of anhydrous magnesium sulfate, 0.5~1.5g/L of potassium dihydrogen phosphate, agar 5-6g/L, 200~1000 μ g/ of sodium selenite
L, surplus are water.
(2) aseptic inoculation after fluid nutrient medium sterilizing, will be carried out, and at 24~29 DEG C, 100~180r/min's turns
Speed lower culture 5~9 days, obtain fermentation culture medium；
(3) it is cleaned after filtering the fermentation culture medium, obtains Pleurotus tuber-regium mycelia.
Preferably, in step (1), the pH value of the fluid nutrient medium is 5~8, preferably 7.
Preferably, in step (2), sterilizing carries out in high-pressure steam sterilizing pan, and condition is the 20min that sterilizes at 121 DEG C.
Preferably, in step (2), condition of culture is to cultivate 7 days under 25 DEG C, the revolving speed of 120r/min.
Beneficial effects of the present invention:
The present invention provides application of the Pleurotus tuber-regium extract in preparation tumor, experiments have shown that passing through mtt assay
The Pleurotus tuber-regium effective component filtered out has anti-tumor activity, to the inhibiting rate of lung carcinoma cell 80% or more.
The present invention also provides the preparation method of the Pleurotus tuber-regium extract, this method passes through to the most suitable culture temperature of Pleurotus tuber-regium
Tetra- degree, growth time, shaking speed and pH aspects study its fermentation condition, obtain optimum fermented and cultured item
Then part further extracts obtained hypha,hyphae using organic solvent, obtains the Pleurotus tuber-regium containing active constituent and mention
Take object.This method is easy to operate, can be realized large-scale production and popularization.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
The present embodiments relate to application of the Pleurotus tuber-regium extract in preparation tumor.
The embodiment of the present invention further relates to a kind of antineoplastic pharmaceutical compositions, be by a effective amount of tumor chemotherapeutic drug and before
The Pleurotus tuber-regium extract stated is active constituent, and the preparation that pharmaceutically acceptable auxiliary material is prepared is added.
Further, above-mentioned tumour can be lung cancer tumor.
Further, which is prepared by the following method to obtain: being added into Pleurotus tuber-regium mycelia organic molten
Agent impregnates 15~30h and preferably for 24 hours obtains filtrate after suction filtration, is dried in vacuo after gained filtrate is concentrated by evaporation, obtains tiger
Milk mushroom extract.
In one embodiment of the invention, organic solvent is in petroleum ether, ethyl acetate, n-butanol, ethyl alcohol, ether
At least one, the polarity of above-mentioned organic solvent successively increases.
Further, dimethyl sulfoxide (DMSO) dissolution is added into obtained Pleurotus tuber-regium extract, then in silicagel column
It is middle to carry out gradient elution with the mixed solvent system of chloroform and methanol, obtain eluent.The volume ratio of the chloroform and methanol is
1:(1~9).
In one embodiment of the invention, Pleurotus tuber-regium mycelia is obtained by fermentation culture method, and this method includes following
Step:
(1) fluid nutrient medium is prepared, 150~250g/L of potato, 15~25g/L of glucose are contained in the fluid nutrient medium,
0.3~0.8g/L of anhydrous magnesium sulfate, 0.5~1.5g/L of potassium dihydrogen phosphate, agar 5-6g/L, 200~1000 μ g/L of sodium selenite,
Surplus is water.
In one embodiment of the invention, which is prepared by the following method to obtain:
[1] boiling after potato slice, will be added to boil 4~7min, obtain mixed liquor；
[2] filtrate is obtained after filtering mixed liquor, and anhydrous magnesium sulfate, potassium dihydrogen phosphate, selenous acid are added into filtrate
Sodium, glucose and agar, boil and make it completely dissolved, and obtain solution；
[3] solution is settled to 1000mL, obtains fluid nutrient medium.
Further, it when the pH value of the fluid nutrient medium is 5~8, preferably 7, is grown most beneficial for mycelia.
(2) after the fluid nutrient medium sterilizing obtained step (1), aseptic inoculation is carried out, and at 24~29 DEG C, 100~
It is cultivated 5~9 days under the revolving speed of 180r/min, obtains fermentation culture medium；
In one embodiment of the invention, sterilizing carries out in high-pressure steam sterilizing pan, and condition is to sterilize at 121 DEG C
20min.Subsequent condition of culture is to cultivate 7 days under 25 DEG C, the revolving speed of 120r/min.
(3) it is cleaned after filtering the fermentation culture medium that step (2) obtains, obtains Pleurotus tuber-regium mycelia.
Embodiment
Pleurotus tuber-regium is purchased from Jiangxi Province's rich people's edible mushroom Development Base (Yihuang County rich people planting edible mushroom profession society)；Cancer cell
A549 is derived from attached 4th hospital (forth academy, province) of Hebei Medical University.
(1) preparation and inoculation of fluid nutrient medium
1, experimental material: peeled potatoes 200g, glucose 20g, anhydrous magnesium sulfate 0.6g, potassium dihydrogen phosphate 1g, agar
5.5g, sodium selenite 400 μ g/L, distilled water 1000ml.
2, experimental procedure:
[1] boiling will be added after potato slice, is boiled again 5 minutes or so after its boiling, obtains mixed liquor；
[2] filtrate is taken after filtering mixed liquor, and magnesium sulfate, potassium dihydrogen phosphate, sodium selenite, grape are added into filtrate
Sugar and agar, boil and make it completely dissolved, obtain solution；
[3] it by acquired solution constant volume to 1000mL, and is dispensed into the conical flask of 5 200mL, is placed into high steam and goes out
In bacterium pot, in 121 DEG C of sterilizing 20min；
[4] after sterilizing, aseptic inoculation is carried out after culture medium is cooling, and be put into shaking table and cultivated.
(2) influence that fermentation condition grows mycelia
Table 1 lists the influence that other conditions are constant, and temperature change grows mycelia.The meaning of unit " g/100ml " is
The mycelia weight in wet base contained in the culture medium of every 100ml.It can be seen that by 1 data of table, cultivation temperature has an impact to mycelia growth, but its
Influence it is unobvious, at 24.5~26 DEG C have larger weight in wet base, illustrate be most suitable for Pleurotus tuber-regium cultivation temperature be 25 DEG C.
Mycelia weight in wet base when 1 temperature change of table
Table 2 lists the influence that other conditions are constant, and incubation time variation grows mycelia.It can be seen that, train by 2 data of table
The feeding time has an impact to mycelia growth, and the time is too short, and mycelia growth is incomplete, overlong time automyophagy.Wherein it is most suitable for tiger
The incubation time of milk mushroom growth is 7 days.
Weight in wet base when 2 incubation time of table changes
| Incubation time (day) | 5 | 6 | 7 | 8 | 9 |
| Weight in wet base (g/100ml) | 9.647 | 12.895 | 16.895 | 14.275 | 10.516 |
Table 3 lists the influence that other conditions are constant, and shaking speed variation grows mycelia.It can be seen that, shake by 3 data of table
Bed revolving speed has an impact to mycelia growth, but its influence is less obvious, wherein the shaking speed for being most suitable for Pleurotus tuber-regium growth is 120r/
min。
Weight in wet base when 3 shaking speed of table changes
Table 4 lists the influence that other conditions are constant, and pH value variation grows mycelia.It can be seen that by 4 data of table, culture medium
PH value is different, and mycelia growth conditions are different, and the mycelia weight in wet base obtained from is different, wherein being most suitable for the pH value of Pleurotus tuber-regium growth
It is 7.
Weight in wet base when 4 pH value of table changes
| PH value | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 |
| Weight in wet base (g/100ml) | 3.040 | 5.443 | 10.050 | 12.247 | 16.895 | 12.164 | 8.708 |
Above-mentioned description of test, the most suitable cultivation temperature of Pleurotus tuber-regium are 25 DEG C, the most suitable growth time 7 days, most suitable shaking speed
120r/min, optimum pH 7.
Table 5 lists the influence that other conditions are constant, and the variation of sodium selenite dosage grows mycelia.It can be seen by 5 data of table
Out, sodium selenite additional amount is different, and mycelia growth conditions are different, and the mycelia weight in wet base obtained from is different.Sodium selenite has
The ability of antiperoxide can be improved the growth rate and activity of cell, but additional amount crosses conference and inhibits mycelia growth.Wherein
The additional amount for being most suitable for Pleurotus tuber-regium growth is 400 μ g/L.
Weight in wet base when 5 sodium selenite of table changes
| Sodium selenite (μ g/L) | 0 | 200 | 400 | 600 | 1000 | 1500 |
| Weight in wet base (g/100ml) | 9.147 | 13.225 | 16.785 | 14.256 | 12.763 | 10.158 |
(3) effective component is extracted
1, organic solvent soaking extraction
The Pleurotus tuber-regium fermented and cultured product that above-mentioned optimum condition of culture obtains is centrifuged, powder after precipitating is dry
It is broken, obtain erinaceus mycelium powder.By obtained erinaceus mycelium powder use respectively petroleum ether, ethyl acetate, n-butanol, ethyl alcohol and ether into
Row impregnates, and extracts active constituent therein.Specific step is as follows:
50g erinaceus mycelium powder is placed in conical flask, 150ml organic solvent is added, seals after mixing evenly, in room temperature item
It places under part and filters afterwards for 24 hours, take clear filtrate.
In the manner described above, the mycelial petroleum ether filtrate of Pleurotus tuber-regium, ethyl acetate filtrate, n-butanol filtrate, second are obtained
Alcohol filtrate and ether filtrate.
2, it concentrates and purifies and dissolves
(1) petroleum ether filtrate, ethyl acetate filtrate, n-butanol filtrate, ethanol filtrate and the ether filter above-mentioned leaching obtained
Liquid is dried in vacuo after being concentrated by evaporation respectively with Rotary Evaporators, obtains paste.
(2) it is separately added into dimethyl sulfoxide (DMSO) dissolution into above-mentioned paste, obtains the mycelial petroleum ether of Pleurotus tuber-regium
Extracting solution, acetic acid ethyl acetate extract, n-butanol extracting liquid, ethanol extract and ether extracted liquid.
3, silica gel column chromatography separates
With the mixed solvent system of chloroform and methanol, respectively to the acetic acid ethyl acetate extract obtained after step 2 dissolution and just
Butanol extracting solution carries out gradient elution.By taking acetic acid ethyl acetate extract as an example, the specific steps are as follows:
It using 60g silica gel as adsorbent, mixes and is placed in chromatographic column with solvent, acetic acid ethyl acetate extract (acetic acid is added
The mass ratio of ethyl ester extracting solution and silica gel is 1:30.Then it is rinsed with solvent, sectional quantitative collects eluent.It obtains following
Eluent:
Ethyl acetate 1:1 elute phase: the volume ratio of chloroform and methanol be 1:1, to acetic acid ethyl acetate extract using chloroform with
The mixed solvent of methanol is eluted, and referred to as ethyl acetate elutes phase A.
Ethyl acetate 1:2 elutes phase: being eluted to acetic acid ethyl acetate extract using the mixed solvent of chloroform and methanol, chlorine
The imitative volume ratio with methanol is 1:2.Referred to as ethyl acetate elutes phase B.
N-butanol 1:9 elutes phase: the volume ratio of chloroform and methanol is 1:9, uses chloroform and methanol to n-butanol extracting liquid
Mixed solvent eluted, referred to as n-butanol elute phase C.
(4) MTT experiment
1, the culture of lung carcinoma cell
(1) configuration of RPMI1640 culture medium
1. weighing the RPMI1640 powder of 5.2g under the conditions of 15~30 DEG C of room temperature, adding in 475ml distilled water, sufficiently
After stirring and dissolving, pH value is adjusted to 7.0~7.4；
2. sodium bicarbonate is added into above-mentioned solution, concentration 2.0g/L, and solution is settled to 500ml；
3. the glass funnel formula filter of sterilizing is assembled in superclean bench, sterile 3 are filled into 0.22mm film
In a conical flask, 4 DEG C of refrigerators are saved, spare.
2, lung carcinoma cell originally culture
Human A549 cell lines are derived from, cell recovery had been carried out.The culture bottle fetched is placed in 37 DEG C, 5%CO2
Carbon dioxide incubator in cultivate, every 2-3 days, to cellular matrix turn yellow, change the liquid once.
1. configuring PBS buffer solution (NaCl 8g, KCl 0.2g, KH2PO4 0.2g、Na2HPO4·12H2O 1.15g is added
Distilled water is settled to 1000ml), adjusting pH value is 7.4, is dispensed after sterilizing, every bottle of 100ml.
2. taking the fetal calf serum (FCS) frozen in 4 DEG C of refrigerator defrosting 2h, melt then at 37 DEG C of water-baths.It, will after melting completely
Fetal calf serum is in 56 DEG C of heating water bath 30min, inactivation.
3. in superclean bench, it is 10% that concentration is added into the RPMI1640 culture medium for being preheated to 37 DEG C prepared
15ml fetal calf serum, obtains fresh culture.
4. changing liquid: the old culture medium in culture bottle is removed, after being rinsed 1-2 times with PBS buffer solution, fresh medium is added,
Carbon dioxide incubator (37 DEG C, 5%CO2) culture.
3, lung carcinoma cell had digestive transfer culture
Bottom of bottle 70% or so, which is covered with, to cell carries out cell passage.First by RPMI1640 culture medium, PBS containing 10%FCS
Buffer and trypsin-EDTA solutions are put into 37 DEG C of water-baths and preheat, and are put into workbench after being wiped after preheating with alcohol swab.
1. discarding old culture medium, rinsed with PBS buffer solution.
2. the trypsin solution of 0.5ml 0.25%, 37 DEG C of digestion 2min are added.
Digestive juice is abandoned 3. inhaling, the fresh culture that 10ml or so is added terminates digestion.
4. attached cell is blown and beaten into cell suspension repeatedly with suction pipe, at 37 DEG C, 5%CO2Under the conditions of continue to cultivate, every
It changes the liquid once within 2-3 days.
4, MTT colorimetric method for determining lung cancer cell growth situation
4-5 days after passing on A549 cells (cell is in logarithmic growth phase) are taken, MTT experiment is carried out.
(1) use trypsin digestion in the cell of logarithmic growth phase.
(2) fresh culture is added, piping and druming adjusts cell to suitable dense at cell suspension, with RPMI1640 culture medium
Degree, about every 1ml have 1 × 104A cell.
(3) 96 orifice plates are taken, access 100 μ l lung carcinoma cell suspensions in experimental port, 37 DEG C, 5%CO2Preculture is for 24 hours.
(4) product of the medicinal extract of 5 kinds of organic solvent soaking extraction phases after silica gel column chromatography is dissolved into 64mg/ml with DMSO,
Then 64 μ g/ml are diluted to the RPMI1640 culture medium containing fetal calf serum.
(5) blank group, experimental comparison group, solvent control group and sample-adding group, 3 parallel holes of every group of setting are set.
Blank group adds culture medium to be not added cell, and experimental comparison group is added cell and culture medium, solvent control group be added cell,
Cell, culture solution and each sample to be tested (medicinal extract after dilution) is added in culture medium and DMSO, sample-adding group.
(6) culture medium is discarded after preculture, is separately added into every 100 μ l sample to be tested of hole by (5), is placed in CO2In incubator
Cultivate 48h.
(7) after cultivating, 10 μ l (5mg/ml) of MTT is added in every hole, continues to cultivate 4h, discards culture medium, and every hole is added
150 μ l of DMSO, gently shakes, and after the crystallization dissolution of blue formazan, surveys OD value under 490nm wavelength with microplate reader, records.
(8) according to following formula, the inhibiting rate of each sample crude product is calculated.
5, MTT experiment result and analysis
After arranging according to the OD value that microplate reader measures, it is thin to A549 that each organic solvent extraction phase crude product of Pleurotus tuber-regium is calculated
The inhibiting rate of born of the same parents, the results are shown in Table 5.
Inhibiting rate of the 5 Pleurotus tuber-regium each component of table to A549 cell
The suppression of petroleum ether extract, ethanol extract and aqueous extract to lung carcinoma cell can intuitively be found out by table 5
It makes of unobvious；It is respectively 80.9% and 69.8% that ethyl acetate, which elutes phase A and the inhibiting rate of n-butanol elution phase C, to lung
Cancer cell has apparent inhibiting effect, i.e., the component contained in this two-phase has anti-lung cancer cell activity.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of application of Pleurotus tuber-regium extract in preparation tumor.
2. a kind of antineoplastic pharmaceutical compositions, which is characterized in that it is by a effective amount of tumor chemotherapeutic drug and claim 1 institute
The Pleurotus tuber-regium extract stated is active constituent, and the preparation that pharmaceutically acceptable auxiliary material is prepared is added.
3. application according to claim 1, which is characterized in that the tumour is lung cancer tumor.
4. application according to claim 1, which is characterized in that the Pleurotus tuber-regium extract is prepared by the following method
It arrives: organic solvent being added into Pleurotus tuber-regium mycelia and impregnates, obtains filtrate after suction filtration, carries out vacuum after the filtrate is concentrated by evaporation
It is dry, obtain the Pleurotus tuber-regium extract.
5. application according to claim 4, which is characterized in that the organic solvent is selected from petroleum ether, ethyl acetate, positive fourth
At least one of alcohol, ethyl alcohol, ether.
6. application according to claim 4, which is characterized in that the soaking time is 15~30h.
7. application according to claim 4, which is characterized in that it is molten that dimethyl sulfoxide is added in Xiang Suoshu Pleurotus tuber-regium extract
Solution, then carries out gradient elution with the mixed solvent system of chloroform and methanol in silicagel column, obtains eluent.
8. application according to claim 7, which is characterized in that the volume ratio of the chloroform and methanol is 1:(1~9).
9. application according to claim 4, which is characterized in that the Pleurotus tuber-regium mycelia is obtained by fermentation culture method,
It the described method comprises the following steps:
(1) fluid nutrient medium is prepared, contains 150~250g/L of potato, 15~25g/L of glucose, nothing in the fluid nutrient medium
0.3~0.8g/L of water magnesium sulfate, 0.5~1.5g/L of potassium dihydrogen phosphate, agar 5-6g/L, sodium selenite 200~1000 μ g/L are remaining
Amount is water.
(2) by after fluid nutrient medium sterilizing, aseptic inoculation is carried out, and under 24~29 DEG C, the revolving speed of 100~180r/min
Culture 5~9 days, obtains fermentation culture medium；
(3) it is cleaned after filtering the fermentation culture medium, obtains Pleurotus tuber-regium mycelia.
10. application according to claim 9, which is characterized in that in step (1), the pH value of the fluid nutrient medium is 7,
In step (2), condition of culture is to cultivate 7 days under 25 DEG C, the revolving speed of 120r/min.
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| CN112851764A (en) * | 2021-03-10 | 2021-05-28 | 四川省农业科学院生物技术核技术研究所 | Antioxidant peptide derived from pleurotus tuber-regium fruit body protein and application thereof |
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