CN105622720B - Hammerhead shark meat antioxidant peptide for activating Nrf2-ARE pathway - Google Patents
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- 230000003213 activating effect Effects 0.000 title claims abstract description 8
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- CIJQGPVMMRXSQW-UHFFFAOYSA-M sodium;2-aminoacetic acid;hydroxide Chemical compound O.[Na+].NCC([O-])=O CIJQGPVMMRXSQW-UHFFFAOYSA-M 0.000 description 2
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- -1 DPPH free radical Chemical class 0.000 description 1
- YNMQUIVKEFRCPH-QSFUFRPTSA-N Ile-Ile-Gly Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)O)N YNMQUIVKEFRCPH-QSFUFRPTSA-N 0.000 description 1
- FDBTVENULFNTAL-XQQFMLRXSA-N Leu-Val-Pro Chemical compound CC(C)C[C@@H](C(=O)N[C@@H](C(C)C)C(=O)N1CCC[C@@H]1C(=O)O)N FDBTVENULFNTAL-XQQFMLRXSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K7/00—Peptides having 5 to 20 amino acids in a fully defined sequence; Derivatives thereof
- C07K7/04—Linear peptides containing only normal peptide links
- C07K7/06—Linear peptides containing only normal peptide links having 5 to 11 amino acids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/04—Peptides having up to 20 amino acids in a fully defined sequence; Derivatives thereof
- A61K38/08—Peptides having 5 to 11 amino acids
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Abstract
The invention discloses a hammerhead shark meat antioxidant peptide for activating an Nrf2-ARE pathway. The method takes chignon shark meat as a raw material, enzymolysis liquid is obtained through double-enzyme enzymolysis, the enzymolysis liquid is separated and purified by adopting ultrafiltration, macroporous resin purification, gel column chromatography and reversed-phase high performance liquid chromatography to obtain antioxidant peptide Ile-Ile-Gly-Leu-Val-Pro (IIGLVP), and ESI-MS is used for determining the molecular weight of the antioxidant peptide to be 610.77 Da; the prepared high-activity antioxidant peptide has good scavenging effect on DPPH free radicals, hydroxyl free radicals and superoxide anion free radicals; meanwhile, the protein accumulation of the Nrf2 can be promoted, the Nrf2-ARE channel is activated, and the medicine and the functional product can be used for treating liver injury, skin photoaging, arteriosclerosis, apoplexy, diabetes, obesity and other diseases closely related to the Nrf2-ARE channel.
Description
Technical Field
The invention relates to an antioxidant active peptide, in particular to a hammerhead shark meat antioxidant peptide for activating an Nrf2-ARE pathway.
Background
The whole shark is precious, some types of shark have delicious meat, and the shark is a common dish on a dining table. The fish skin has good toughness and is a raw material for leather processing industry. Modern medicine proves that shark cartilage has great medicinal value, and shark cartilage powder is firstly directly used for treating tumors in the United states in 1992.
Sphyrna lewini is a family of Sphyrna of Chondrichthyidae of Euhynchoidales of Chondrichthyridae, and is mainly distributed in the yellow, east and south China sea.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the hammerhead shark meat antioxidant peptide capable of activating the Nrf2-ARE pathway.
The technical scheme adopted by the invention for solving the technical problems is as follows: an antioxidative peptide of hammerhead shark meat with Nrf2-ARE pathway activation is hexapeptide compound, the amino acid sequence is Ile-Ile-Gly-Leu-Val-Pro (IIGLVP), and ESI-MS determination molecular weight is 610.77 Da.
The preparation method of the hammerhead shark fish meat antioxidant peptide comprises the following steps:
1) pretreatment of hammerhead shark meat: processing the fish meat of the hammerhead shark into homogenate by a high-speed tissue triturator, heating to 90-95 ℃, preserving heat for 5-10 min, adding isopropanol according to the feed liquid ratio of 1g: 2-4 mL, ultrasonically extracting at 25-30 ℃ and the power of 450-500W for 2-3 h, centrifuging at 9000-10000 rpm at 4 ℃ for 10-15 min to remove the isopropanol, and collecting the solid defatted hammerhead shark meat;
2) enzymolysis of the defatted hammerhead shark meat solid matter, namely taking the defatted hammerhead shark meat solid matter, adding glycine-sodium hydroxide buffer solution (0.05mol/L and pH 9.5) into the defatted hammerhead shark meat solid matter according to the solid-to-liquid ratio of 1g:10 mL-15 mL, adjusting the pH to 9.0-10.0 by using 0.1mol/L HCl or 0.1mol/LNaOH to obtain a mixed solution, adjusting the temperature of the mixed solution to 55-65 ℃, and adding alkaline protease (the enzyme activity is more than or equal to 1.95 × 10) into the mixture according to 1.2-1.5 percent of the solid matter amount of the defatted hammerhead shark meat5U/g), keeping the temperature of the enzymolysis solution at 90-95 ℃ for 10-15 min after 2-2.5 h of enzymolysis, deactivating enzyme, adjusting the temperature of the enzymolysis solution to 35-45 ℃, and adding trypsin (the enzyme activity is more than or equal to 2.5 × 10) according to 1.0-1.2% of the solid mass of the defatted hammerhead shark meat4U/g), the enzymolysis time is 3-4 h, the enzymolysis liquid is cooled to room temperature after being insulated for 10-15 min at 90-95 ℃, and is centrifuged for 10-15 min at 10000-12000 rpm, and supernatant is taken.
) Separation and preparation of hammerhead shark fish meat antioxidant peptide: and sequentially carrying out ultrafiltration, macroporous resin purification, gel column chromatography and RP-HPLC purification on the supernatant to obtain the hammerhead shark fish meat antioxidant peptide.
Preferably, the specific processes of ultrafiltration, macroporous resin purification, gel column chromatography and RP-HPLC purification in the step 3) are as follows:
and (3) ultrafiltration: and (3) performing ultrafiltration treatment on the enzymolysis supernate by using a 1kDa ultrafiltration membrane, and collecting the part with the molecular weight less than 1kDa to obtain an ultrafiltration enzymolysis liquid.
Refining macroporous resin: preparing the ultrafiltration enzymolysis liquid into a solution of 15-20 mg/mL, slowly adding the solution into a glass column with the ratio of the ultrafiltration enzymolysis liquid to the D101 macroporous resin being 1: 10-15, eluting with 3-5 times of column volume of double-distilled water to remove impurities, eluting with 3-4 times of column volume of 95% ethanol, collecting 95% ethanol eluate, and spray drying to obtain the macroporous resin refined polypeptide.
Gel column chromatography: dissolving the macroporous resin refined polypeptide in double distilled water to prepare a solution with the concentration of 20-30 mg/mL, separating by Sephadex G-25 column chromatography, eluting by the double distilled water with the flow rate of 0.8-1.2 mL/min, collecting one tube of the eluted solution every 3min, detecting at 220nm, merging the solutions in the test tube according to peaks, comparing the removal activity of hydroxyl free radicals of each peak, selecting the component with the strongest activity, and freeze-drying to obtain a gel chromatography zymolyte;
RP-HPLC purification: preparing the gel chromatography zymolyte into a solution of 90-100 mu g/mL by using double distilled water, purifying by using RP-HPLC, obtaining 1 polypeptide with high antioxidant activity, namely Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) according to the scavenging activity of hydroxyl free radicals, and determining the molecular weight of the ESI-MS to be 610.77 Da.
More preferably, the RP-HPLC conditions are: the sample injection amount is 15-20 mu L; chromatographic column Zorbax SB-C18(250mm × 4.6.6 mm, 5 μm), gradient eluting with water-acetonitrile (acetonitrile concentration is increased from 0 to 45% at constant speed in 0-45 min), eluting at 0.8-1.0 mL/min, and ultraviolet detecting wavelength is 220 nm.
The hammerhead shark meat antioxidant peptide for activating the Nrf2-ARE channel, i.e., Ile-Ile-Gly-Leu-Val-Pro (IIGLVP), has good scavenging effect on DPPH free radicals, hydroxyl free radicals and superoxide anion free radicals; meanwhile, Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) can also promote the accumulation of Nrf2 protein and activate the Nrf2-ARE channel, so that the antioxidant enzyme and II phase detoxification enzyme ARE regulated up to remove harmful substances, and the organism is protected from being damaged by the toxic substances. Therefore, Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) can be used as a medicine or a functional product for treating diseases closely related to the Nrf2-ARE pathway, such as liver injury, skin photoaging, arteriosclerosis, stroke, diabetes and obesity.
Drawings
FIG. 1 is a Sephadex G-25 chromatogram of a Sephadex gel of the invention.
FIG. 2 RP-HPLC chromatogram of Sephadex G-25 preparation of substrate.
FIG. 3 Effect of Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) on Nrf2 protein levels.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example (b):
the preparation method of the hammerhead shark fish meat antioxidant peptide comprises the following preparation process flows: the fish meat of the hammerhead shark → the enzymolysis of double enzymes → the zymolyte → the ultrafiltration → the purification of macroporous resin → the gel filtration chromatography → the preparation of high performance liquid chromatography → the antioxidative peptide.
) Pretreatment of hammerhead shark meat: processing the fish meat of the hammerhead shark into homogenate by a high-speed tissue triturator, heating to 95 ℃, preserving heat for 8min, adding isopropanol according to the feed liquid ratio of 1g to 3mL, ultrasonically extracting at 25 ℃ and 500W for 3h, centrifuging at 4 ℃ and 10000rpm for 10min to remove the isopropanol, and collecting the solid matter of the defatted hammerhead shark;
2) enzymolysis of defatted hammerhead shark meat solid, collecting defatted hammerhead shark meat solid, adding glycine-sodium hydroxide buffer solution (0.05mol/L, pH 9.5) at solid-to-liquid ratio of 1g:12mL, adjusting pH to 9.5 with 0.1mol/L HCl or 0.1mol/L NaOH to obtain mixed solution, adjusting the temperature of the mixed solution to 60 deg.C, adding alkaline protease (enzyme activity is not less than 1.95 × 10) according to 1.2% of the solid content of defatted hammerhead shark meat5U/g), performing enzymolysis for 2.5 hr, keeping the temperature of the enzymolysis solution at 95 deg.C for 15min, inactivating enzyme, adjusting the temperature of the enzymolysis solution to 40 deg.C, adding trypsin (the enzyme activity is not less than 2.5 × 10) according to 1.0% of solid substance of defatted Sphyrna Spinosa4U/g), the enzymolysis time is 34h, the enzymolysis liquid is cooled to the room temperature after being preserved for 15min at 95 ℃, and is centrifuged for 10min at 12000rpm, and the supernatant is taken.
) Separation and preparation of hammerhead shark fish meat antioxidant peptide: and sequentially carrying out ultrafiltration, macroporous resin purification, gel column chromatography and RP-HPLC purification on the supernatant to obtain the hammerhead shark fish meat antioxidant peptide.
Ultrafiltration: and (3) performing ultrafiltration treatment on the enzymolysis supernate by adopting a 1kDa ultrafiltration membrane, and collecting the part with the molecular weight less than 1kDa to obtain an ultrafiltration enzymolysis liquid.
② refining macroporous resin: preparing the ultrafiltration enzymolysis liquid into a 20mg/mL solution, slowly adding the solution into a glass column with the weight-volume ratio (mg/mL) of the filter enzymolysis liquid to the D101 macroporous resin being 1:15, eluting by using 3 times of column volume of double distilled water to remove impurities, eluting by using 4 times of column volume of 95% ethanol, collecting 95% ethanol eluate, and performing spray drying to obtain the macroporous resin refined polypeptide.
③ gel column chromatography: dissolving the macroporous resin refined polypeptide in double distilled water to prepare a solution with the concentration of 25mg/mL, separating by Sephadex G-25 column chromatography, eluting with double distilled water at the flow rate of 1.0mL/min, collecting one tube of the eluted solution every 3min, detecting at 220nm, merging the solutions in the test tubes according to peaks, comparing the scavenging activity of hydroxyl free radicals of each peak, selecting the component with the strongest activity, and freeze-drying to obtain a gel chromatography zymolyte Fr.3 (figure 1);
④ RP-HPLC purification comprises preparing the gel chromatography zymolyte into 95 μ g/mL solution with double distilled water, and purifying by RP-HPLC (preferably, the RP-HPLC condition is that the sample amount is 20 μ L; and the chromatographic column Zorbax SB-C18(250mm × 4.6.6 mm, 5 μm), gradient eluting with water-acetonitrile (acetonitrile concentration is increased from 0 to 45% at constant speed in 0-45 min), eluting at 0.8mL/min, ultraviolet detecting wavelength is 220nm), and obtaining 1 polypeptide with high antioxidant activity according to hydroxyl radical scavenging activity (figure 2).
Structure detection: collecting polypeptide DCPE-B with highest hydroxyl free radical scavenging activity, detecting by RP-HPLC to obtain single peak, determining amino acid sequence by protein/polypeptide sequence analyzer to be Ile-Ile-Gly-Leu-Val-Pro (IIGLVP), and determining molecular weight by ESI-MS to be 610.77 Da.
Radical scavenging experiments: the obtained hammerhead shark meat antioxidant peptide Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) is subjected to free radical scavenging experiment. The experimental results show that: Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) vs DPPH free radical (EC)501.89mg/mL), hydroxyl radical (EC)500.28mg/mL) and superoxideAnionic free radical (EC)500.13mg/mL) had good scavenging effect.
Effect of antioxidant peptides on activation of Nrf2/ARE pathway: inoculating human embryonic kidney cell line HEK293 cells in logarithmic growth phase into a 60mm dish for 24 hours, respectively adding 10 mu M of enzymolysis liquid and Ile-Ile-Gly-Leu-Val-Pro (IIGLVP), and continuously culturing for 4 hours. The supernatant was discarded, the cells were lysed with RIPA buffer (shanghai bi yunnan biotechnology limited), and the protein concentration was determined by BCA method. 20. mu.g of protein from each sample was separated by SDS-PAGE and the protein level of Nrf2 was detected by conventional immunoblotting. The result shows that Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) can promote the accumulation of Nrf2 protein (figure 3), activate the Nrf2-ARE channel, further up-regulate the anti-oxidase and II phase detoxification enzyme to remove harmful substances, and protect the organism from being damaged by toxic substances. Therefore, Ile-Ile-Gly-Leu-Val-Pro (IIGLVP) can be used as a medicine or a functional product for treating diseases closely related to the Nrf2-ARE pathway, such as liver injury, skin photoaging, arteriosclerosis, stroke, diabetes and obesity.
Finally, it should also be noted that the above-mentioned list is only one specific embodiment of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
SEQUENCE LISTING
<110> Zhejiang ocean academy
<120> a hammerhead shark meat antioxidant peptide for activating Nrf2-ARE pathway
<130>zjou-wb-201512-101
<160>1
<170>PatentIn version 3.5
<210>1
<211>6
<212>PRT
<213> Artificial sequence
<400>1
Ile Ile Gly Leu Val Pro
1 5
Claims (1)
1. A hammerhead shark meat antioxidant peptide for activating an Nrf2-ARE pathway has an amino acid sequence of Ile-Ile-Gly-Leu-Val-Pro, and a molecular weight of 610.77Da measured by ESI-MS.
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| CN103524596A (en) * | 2012-07-03 | 2014-01-22 | 浙江海洋学院 | Antioxidative peptide of shark protein as well as preparation method and use thereof |
| CN103524597A (en) * | 2012-07-03 | 2014-01-22 | 浙江海洋学院 | Antioxidant peptide prepared from shark prolamin and preparation method and application thereof |
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| CN103524596A (en) * | 2012-07-03 | 2014-01-22 | 浙江海洋学院 | Antioxidative peptide of shark protein as well as preparation method and use thereof |
| CN103524597A (en) * | 2012-07-03 | 2014-01-22 | 浙江海洋学院 | Antioxidant peptide prepared from shark prolamin and preparation method and application thereof |
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