CN113549660B - Preparation method of broccoli sprout extract and anti-inflammatory activity thereof - Google Patents

Preparation method of broccoli sprout extract and anti-inflammatory activity thereof Download PDF

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CN113549660B
CN113549660B CN202110648434.2A CN202110648434A CN113549660B CN 113549660 B CN113549660 B CN 113549660B CN 202110648434 A CN202110648434 A CN 202110648434A CN 113549660 B CN113549660 B CN 113549660B
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broccoli
extract
miao
ganfen
broccoli sprout
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CN113549660A (en
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刘海杰
孙瑜阳
刘军
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China Agricultural University
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China Agricultural University
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    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P13/00Preparation of nitrogen-containing organic compounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C331/00Derivatives of thiocyanic acid or of isothiocyanic acid
    • C07C331/16Isothiocyanates
    • C07C331/18Isothiocyanates having isothiocyanate groups bound to acyclic carbon atoms
    • C07C331/20Isothiocyanates having isothiocyanate groups bound to acyclic carbon atoms of a saturated carbon skeleton

Abstract

The invention relates to the field of food and the field of natural active substance extraction, in particular to a preparation method of a broccoli sprout extract, which comprises the steps of drying, crushing, degreasing, hydrolyzing, ultrasonic leaching and rotary evaporation of broccoli sprouts; wherein dichloromethane is adopted to extract the active ingredients of the broccoli sprouts; the broccoli sprout extract extracted by the preparation method shows better anti-inflammatory activity and has high application value.

Description

Preparation method of broccoli sprout extract and anti-inflammatory activity thereof
Technical Field
The invention relates to the field of foods and the field of natural active substance extraction, in particular to a preparation method and anti-inflammatory activity of broccoli sprout extracts.
Background
Broccoli (Brassica oleracea l.var.itica), also known as broccoli, is an annual plant of the brassica genus of the cruciferae family. The broccoli contains abundant natural active ingredients such as thioglucoside (GLS for short), polyphenol, anthocyanin, etc., and the nutritional ingredients are contained in plant perk. When thioglycoside is contacted with Myrosinase (MYR), isothiocyanates (ITCs) having remarkable anticancer effects can be produced by hydrolysis. The most abundant thioloside in broccoli is Glucoraphanin (GRA), the hydrolysate of which, glucoraphanin (Sulforaphane), is the natural ingredient with the strongest anticancer effect to date.
The sprouting vegetable is characterized by that it utilizes plant seed or other nutrient storage organ to directly grow out tender bud, sprout, bud ball, young shoot or young stem for eating under the condition of darkness or illumination. During the long-term growth of plants, the seedlings accumulate more phytochemicals, so that the plant active substances in the sprouting vegetables are 2-10 times that of the mature vegetables, and the content of glucoraphanin and glucoraphanin in the broccoli sprouts is 10-100 times that of the mature broccoli sprouts. Along with the improvement of the quality and variety requirements of consumers on vegetables, the sprouting vegetable is taken as a green food with rich nutrition and high quality, is more and more favored by people due to the unique flavor and the health care effect of homology of medicine and food, and the sprouting vegetable industry becomes an emerging vegetable industry with great development prospect.
Inflammation is the immune response of the body to the stimulation of pathogens. In general, immune cells can release various cytokines to regulate internal environmental signals during the inflammation process, promoting tissue repair and inflammation elimination. However, in the development process of long-term inflammation, inflammatory cells such as macrophages, mast cells, neutrophils, eosinophils and the like attack tissues, release various inflammatory factors such as IL-1 beta, IL-6, TNF-alpha and the like and a large amount of active oxygen, cause tissue injury, change the microenvironment of the organism, cause cellular gene mutation, further cause inflammation deterioration and finally promote tumor occurrence. Therefore, suppression of the occurrence and development of inflammation is one of the problems that are currently of practical significance. However, the current research on the antioxidant, antibacterial and anticancer activities of broccoli has been focused much, and the research on anti-inflammatory activity is very little.
Disclosure of Invention
The applicant has studied the biological activity of the broccoli sprouts in detail, and found that the broccoli sprout active substances extracted by a specific extraction method can provide good anti-inflammatory activity, and further studied the influence of different culture mediums on the anti-inflammatory activity of the broccoli sprout extracts. In fresh broccoli sprouts, the precursor substance of raphanin is present in different compartments than MYR. However, in the subsequent grinding process, glucoraphanin and MYR are released and are in the same reaction space. In the hydrolysis process, MYR is activated so as to exert physiological functions and promote the conversion of glucoraphanin into glucoraphanin. Therefore, without hydrolysis, MYR cannot be activated, i.e., raphanin cannot be produced. The extraction process of the broccoli sprouts has the characteristics of few steps, no need of other reagents in the hydrolysis process to regulate the hydrolysis environment, convenience in operation and the like.
In addition, anti-inflammatory activity is a more general concept that, if embodied, can be subdivided into various diseases. Currently, anti-inflammatory activity with respect to sulforaphane is mainly focused on inflammation of organs or tissues such as kidneys, livers, stomach, muscles, etc. And for the prevention and treatment of ulcerative colitis, few studies involving ITCs and sulforaphane have been conducted. Thus, although sulforaphane has some anti-inflammatory activity, the anti-inflammatory effect against specific diseases such as ulcerative colitis is not completely understood.
In one aspect, the present application provides a method for preparing a broccoli sprout extract, which is characterized in that: the method comprises the steps of drying, crushing, degreasing, hydrolyzing, ultrasonic leaching and rotary evaporating of broccoli sprouts; wherein dichloromethane is used for extracting the active ingredients of the broccoli sprouts.
Further, the method comprises the steps of:
grinding and sieving fresh broccoli sprouts Miao Donggan to obtain broccoli sprouts Miao Ganfen;
degreasing dry powder with n-hexane, and air-drying the organic solvent;
adding distilled water into the obtained residue, and hydrolyzing under dark condition to obtain wet meal;
adding a drying agent into the obtained wet meal, and then adding dichloromethane for extraction;
and (3) performing rotary evaporation on the extract liquid to obtain the broccoli sprout extract.
Further, wherein the broccoli sprouts are crushed to 80 mesh.
Further, the ratio of the broccoli sprouts Miao Ganfen to the n-hexane is 1:8g/mL, the degreasing temperature is room temperature, and the degreasing time is 1h.
Further, the feed liquid ratio of the broccoli sprouts Miao Ganfen to the distilled water is 1:4g/mL, the hydrolysis temperature is room temperature, and the hydrolysis time is 8 hours; the desiccant consists of NaCl and Na in a mass ratio of 4:3 2 SO 4 The mass ratio of the desiccant to the distilled water is 2:1; the feed liquid ratio of the broccoli sprouts Miao Ganfen to the dichloromethane is 1:10g/mL; dichloromethane extraction was performed 3 times.
Further, the temperature of the rotary evaporation is 30-35 ℃.
Further, the broccoli sprouts are fresh broccoli sprouts cultivated by slightly acidic electrolyzed water.
In another aspect, the present application provides broccoli sprout extracts prepared by the above preparation method.
In another aspect, the present application provides the use of the broccoli sprout extract as described above in anti-inflammatory aspects.
Further, the inflammation is ulcerative colitis.
Preferably, the inflammation is cell inflammation caused by LPS/IFN-gamma and ulcerative colitis caused by DSS.
The broccoli sprouts in the present application are not limited to specific varieties, and although the activities may be different, the broccoli sprouts of each variety may be used.
Inflammation in the present application is not limited to colitis, and inflammatory reactions of various organs on human or animal bodies can be controlled by the extract of the present application through proper verification; the inflammatory response is also not limited to cellular inflammatory responses and colitis symptoms in the examples, and inflammatory responses and symptoms conventionally recognized in the art can be controlled with the extracts of the present application.
The beneficial effects are that:
the invention provides a preparation method of a broccoli sprout extract, which greatly reserves characteristic active ingredients in broccoli sprouts, and the broccoli sprout extract prepared by the invention has better anti-inflammatory activity and high application value.
Drawings
FIG. 1 is the effect of broccoli extract on BMDMs inflammatory gene expression;
FIG. 2 shows the change in body weight, stool shape, hematochezia and DAI of mice; (Ctrl group represents Control, DSS group represents 2.5% DSS, br (TW) +dss group represents 20mg/kg·bw tw+2.5% DSS, br (sea) +dss group represents 20mg/kg·bw saiw+2.5% DSS);
FIG. 3 is a plot of colon tissue HE staining sections, histological scores, and colon length of mice; (Ctrl group represents Control, DSS group represents 2.5% DSS, BR (TW)/DSS group represents 20 mg/kg. Bw TW+2.5% DSS, BR (SEAW)/DSS group represents 20 mg/kg. Bw SAEW+2.5% DSS).
FIG. 4 shows the content of sulforaphane in different extracts, and the content of sulforaphane in the crude extract is calculated to be 19.1mg/100mg (FIG. 4A, slightly acidic water culture group) and 16.0mg/100mg (FIG. 4B, tap water culture group) respectively by comparison with a standard spectrogram, so that a significant difference exists. Fig. 4C is a map of the sulforaphane standard.
Detailed Description
The invention is further illustrated below in connection with specific examples.
Example 1
1) Fresh broccoli sprouts cultivated by slightly acidic electrolyzed water (Slightly Acidic Electrolyzed Water, SAEW) are harvested, freeze-dried and crushed to 80-mesh sieve to obtain broccoli sprout dry powder.
2) Adding n-hexane into the dry powder obtained in the step 1) according to a feed-liquid ratio of 1:8, wherein the unit is g/mL; shaking for 1h at room temperature, centrifuging at 5000r/min for 10min to obtain residue, and air drying the organic reagent in a fume hood.
3) Taking the residue obtained in the step 2), adding distilled water, and placing in a dark environment for hydrolysis at room temperature for 8 hours; the feed liquid ratio of the broccoli sprouts Miao Ganfen to distilled water is 1:4, and the unit is g/mL.
4) Adding NaCl and Na into the wet meal in the step 3) 2 SO 4 A desiccant comprising NaCl and Na 2 SO 4 The mass ratio of the added drying agent to the distilled water in the step 3) is 4:3, and the mass ratio of the added drying agent to the distilled water in the step 3) is 2:1. Adding dichloromethane, mixing, ultrasonic extracting for 30min, centrifuging at 5000r/min for 10min, and collecting extractive solution; the feed liquid ratio of the broccoli sprouts Miao Ganfen to the dichloromethane is 1:10, and the unit is g/mL. Repeating the extraction process for three times, and combining the obtained extracts.
5) And (3) performing rotary evaporation on the extract liquid obtained in the step (4) at the temperature of 30-35 ℃ to evaporate dichloromethane so as to obtain the broccoli extract.
Example 2
1) Fresh broccoli sprouts cultivated by Tap Water (TW) are harvested, freeze-dried and crushed to 80 mesh sieve to obtain broccoli sprout dry powder.
2) Adding n-hexane into the dry powder obtained in the step 1) according to a feed-liquid ratio of 1:8, wherein the unit is g/mL; shaking for 1h at room temperature, centrifuging at 5000r/min for 10min to obtain residue, and air drying the organic reagent in a fume hood.
3) Taking the residue obtained in the step 2), adding distilled water, and placing in a dark environment for hydrolysis at room temperature for 8 hours; the feed liquid ratio of the broccoli sprouts Miao Ganfen to distilled water is 1:4, and the unit is g/mL.
4) Adding NaCl and Na into the wet meal in the step 3) 2 SO 4 A desiccant comprising NaCl and Na 2 SO 4 The mass ratio of the added drying agent to the distilled water in the step 3) is 4:3, and the mass ratio of the added drying agent to the distilled water in the step 3) is 2:1. Adding dichloromethane, mixing, ultrasonic extracting for 30min, centrifuging at 5000r/min for 10min, and collecting extractive solution; the feed liquid ratio of the broccoli sprouts Miao Ganfen to the dichloromethane is 1:10, and the unit is g/mL. Repeating the extraction process for three times, and combining the obtained extracts.
5) And (3) performing rotary evaporation on the extract liquid obtained in the step (4) at the temperature of 30-35 ℃ to evaporate dichloromethane so as to obtain the broccoli extract.
Example 3
The beneficial effects of the invention are further illustrated by the following protective effect of the broccoli sprout extract prepared by the invention on inflammatory cells and colitis mice:
test data one: primary cells were extracted from BABL/C mouse Bone Marrow and induced with M-CSF to give Bone Marrow primary macrophages (Bone Marrow-derived Macrophages, BMDMs). During the induction of inflammation by LPS/IFN-gamma, the broccoli sprout extracts (Broccoli sprouts extract, BR) of example 1 or example 2 were added at different concentrations to the cell culture broth and incubated for 24h. For comparison, cells that had not been treated with LPS and that had not been treated with drug were used as a control group. After the induction, the anti-inflammatory effect of the broccoli sprout extract was evaluated by the expression of the cell inflammation marker gene.
Measurement results: as shown in FIG. 1, the broccoli sprout extract of example 1 or example 2 can significantly inhibit the expression of inflammatory genes IL-1 beta and iNOS, and the inhibition rate of the broccoli sprout extract on the expression of the two genes can reach 60.9% and 62.3% at most. From this, it can be seen that the broccoli sprout extract has a good anti-inflammatory effect.
Test data two: the C57BL/6Jnifdc mice were induced for 7 days with DSS (sodium dextran sulfate) while the broccoli sprout extracts prepared in example 1 or example 2 were perfused daily for a fixed time. As a comparison, mice not subjected to DSS induction while not being perfused with broccoli sprout extract were used as a control group. The mice were recorded for body weight changes, fecal character, rectal bleeding, and disease activity index during induction. The colon tissue of the mice was taken on the next day of final administration, and the morphology was observed.
Measurement results: as shown in fig. 2 and 3, the broccoli sprout extract of example 1 or example 2 has a certain degree of alleviation effect on loose stool, hematochezia and weight loss of the colitis mice caused by DSS, and has remarkable effect in the late treatment period (4-7 days). Meanwhile, the intervention of the broccoli sprout extract can relieve pathological features such as mucosa collapse, mucosa edema, goblet cell disappearance, crypt deformation, inflammatory cell infiltration and the like, and reduce colon shrinkage. Therefore, the broccoli sprout extract has better anti-colonitis effect.
Finally, it should be noted that: the foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. It will be apparent to those skilled in the art that several simple deductions, modifications or substitutions can be made according to the idea of the invention, and these simple modifications and combinations should also be regarded as the disclosure of the invention, which falls within the scope of the invention.

Claims (3)

1. Use of a broccoli sprout extract in the manufacture of a medicament for the treatment of ulcerative colitis, a method of preparing the broccoli sprout extract, the broccoli sprout being a fresh broccoli sprout cultivated with slightly acidic electrolyzed water, the method comprising the steps of:
(1) Freeze drying fresh broccoli sprout, and pulverizing to obtain broccoli sprout Miao Ganfen;
(2) Adding n-hexane into broccoli bud Miao Ganfen for degreasing, and airing an organic solvent, wherein the ratio of the broccoli bud Miao Ganfen to the n-hexane is 1:8g/mL, the degreasing temperature is room temperature, and the degreasing time is 1h;
(3) Adding distilled water into the residue obtained in the step (2), and hydrolyzing under dark condition to obtain wet meal, wherein the feed liquid ratio of broccoli bud Miao Ganfen to distilled water is 1:4g/mL, the hydrolysis temperature is room temperature, and the hydrolysis time is 8h;
(4) Adding a drying agent into the wet meal obtained in the step (3), adding dichloromethane, carrying out vortex mixing, carrying out ultrasonic leaching extraction for 30 minutes, and centrifugally collecting an extract, wherein the drying agent consists of NaCl and Na in a mass ratio of 4:3 2 SO 4 The mass ratio of the desiccant to the distilled water is 2:1; the feed liquid ratio of the broccoli sprouts Miao Ganfen to the dichloromethane is 1:10g/mL; extracting with dichloromethane for 3 times;
(5) And (3) performing rotary evaporation on the extract liquid to obtain the broccoli sprout extract.
2. The use according to claim 1, wherein (1) the freeze-dried fresh broccoli sprouts are crushed to 80 mesh.
3. Use according to claim 1, wherein (5) the temperature of rotary evaporation is 30-35 ℃.
CN202110648434.2A 2021-06-10 2021-06-10 Preparation method of broccoli sprout extract and anti-inflammatory activity thereof Active CN113549660B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
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CN104086469A (en) * 2014-05-22 2014-10-08 苏州泽达兴邦医药科技有限公司 Method for extracting and purifying sulforaphane from broccoli seeds

Patent Citations (3)

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CN101229211A (en) * 2008-01-31 2008-07-30 广东药学院 Broccoli seed extractive and preparing method thereof
CN101514174A (en) * 2009-02-24 2009-08-26 黑龙江八一农垦大学 Method for extracting multifunctional sulforaphane from broccoli sprouting vegetable
CN104086469A (en) * 2014-05-22 2014-10-08 苏州泽达兴邦医药科技有限公司 Method for extracting and purifying sulforaphane from broccoli seeds

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