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A kind of bioactive polypeptide pllpqsl and its preparation method and application

A bioactive peptide and drug technology, applied in the protein field, can solve problems such as human body risks, and achieve the effects of reducing body aging, improving quality, and scavenging free radicals

Active Publication Date: 2020-05-12
ZHEJIANG HUITAI LIFE HEALTH TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Some early synthetic antioxidants such as butyl hydroxyanisole (BHA) and 2,6-di-tert-butyl-4-methylphenol (BHT) were used in food as lipid antioxidants, but these artificial Synthetic additives are potentially dangerous to the human body

Method used

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  • A kind of bioactive polypeptide pllpqsl and its preparation method and application
  • A kind of bioactive polypeptide pllpqsl and its preparation method and application
  • A kind of bioactive polypeptide pllpqsl and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The artificial synthesis of embodiment 1 active peptide PLLPQSL

[0039] 1. Synthesis of Bioactive Peptides

[0040] 1. Weigh 3g of RINK resin (degree of substitution: 0.3mmol / g) into a 150ml reactor and soak with 50ml of dichloromethane (DCM).

[0041] After 2.2 hours, the resin was washed with nitrogen-dimethylformamide (DMF) 3 times the volume of the resin, and then drained. This was repeated four times, and the resin was drained for use.

[0042] 3. Add a certain amount of 20% piperidine (piperidine / DMF=1:4, v:v) into the reactor, and shake it on a decolorizing shaker for 20 minutes to remove the Fmoc protecting group on the resin. After deprotection, wash four times with 3 times the resin volume of DMF, and then drain.

[0043] 4. Take a small amount of resin and test it with ninhydrin (Ninhydrin Nine Wells) method (two drops each of test A and test B, react at 100°C for 1 min), if the resin has color, it means that the deprotection is successful.

[0044] 5. We...

Embodiment 2

[0080] Antioxidant activity experiment of embodiment 2 bioactive peptides

[0081] 1. Determination of in vitro antioxidant activity of biologically active peptide PLLPQSL by [DPPH·] method

[0082] 1. Experimental reagents and instruments:

[0083] Reagent: 1,1-diphenyl-2-trinitrophenylhydrazine (1,1-Diphenyl-2-picrylhydrazyl[DPPH·]), produced by Wako Company of Japan; Methanol, provided by Shanghai Sinopharm Company; obtained in Example 1 Biologically active polypeptide PLLPQSL.

[0084] Main instruments: Sunrise microplate reader, product of Tecan Company of Austria; 96-well cell culture plate, manufactured by Millipore Company of the United States; analytical balance, product of Meitelei-tolido Company.

[0085] 2. Experimental method:

[0086] (1) 1mmol / L [DPPH·]methanol solution

[0087] Weigh 0.349 mg [DPPH·] with an analytical balance and dissolve it in 1 mL of methanol solution to prepare a 1 mmol / L [DPPH·] methanol solution, store it in the dark on tin foil, and us...

Embodiment 3

[0120] Anti-aging activity experiment of embodiment 3 bioactive peptides

[0121] 1. Experiments on the effect of biologically active polypeptide PLLPQSL on the structure of spleen tissue in vivo

[0122] 1. Experimental reagents and instruments:

[0123] Reagents: experimental animal ICR mice (male 5 weeks old), Shanghai Experimental Animal Center; D-gal, Sinopharm Chemical Reagent Co., Ltd.; paraformaldehyde, Sinopharm Chemical Reagent Co., Ltd.; sodium chloride, Sinopharm Chemical Reagent Co., Ltd. Ltd; the biologically active polypeptide PLLPQSL obtained in Example 1.

[0124] Instruments and equipment: CM-230 Mole ultra-clean water, Shanghai Moller Scientific Instrument Co., Ltd.; MilliporeMILLEX GP0.22μm filter membrane, Millipore Corporation; GL-22M high-speed refrigerated centrifuge, Shanghai Luxiangyi Centrifuge Instrument Co., Ltd.

[0125] 2. Experimental method:

[0126] (1) Modeling of animal aging models

[0127] After one week of adaptive feeding, the ICR mi...

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Abstract

The invention relates to the field of proteins, in particular to a bioactive polypeptide PLLPQSL, a preparation method thereof and an application of the bioactive polypeptide. The amino acid sequenceof the bioactive polypeptide PLLPQSL is Pro-Leu-Leu-Pro-Gln-Ser-Leu. An in-vitro antioxidant experiment and an in-vivo anti-aging experiment verify that the polypeptide PLLPQSL has good antioxidant biological activity and anti-aging activity. On one hand, the bioactive polypeptide PLLPQSL has good antioxidant activity, free radicals in a body can be removed, and life quality can be improved. On the other hand, in-vivo anti-peroxidase system activity can be improved, the exogenous stimulation resisting function of the body is enhanced, so that the probability of aging, senescence and sickness of the body is reduced, and the bioactive polypeptide PLLPQSL is of great significance for developing food, health care products and medicines with antioxidant functions and anti-aging functions.

Description

technical field [0001] The invention relates to the field of proteins, in particular to a biologically active polypeptide PLLPQSL and its preparation method and application. Background technique [0002] During the fermentation process of milk by lactic acid bacteria, a part of protein in milk is metabolized and utilized by lactic acid bacteria, and a series of physiological and biochemical reactions occur, making the protein into polypeptides or free amino acids, which are digested and absorbed by the human body or absorbed and transported by small intestinal epithelial cells directly into the blood circulation of the human body. Lactic acid bacteria cells also have some self-synthesized protein polypeptide fragments for bacterial growth and utilization. Among these peptides, some have special physiological functions and are called "bioactive peptides". [0003] It is especially important to find safe bioactive peptides in natural food sources. In recent years, it has be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K14/335C12N15/31A61K38/16A61P39/06A23L33/18A61K8/64A61Q19/00A61Q19/08
CPCA23L33/18A23V2002/00A61K8/64A61K38/00A61P39/06A61Q19/00A61Q19/08C07K14/335A23V2200/302A23V2200/30A23V2250/55
Inventor 张少辉张伯宇占文静亚辛·黑马尔洪志骏陈平陈承余林学海
Owner ZHEJIANG HUITAI LIFE HEALTH TECH CO LTD
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