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Functional peptides and their uses

A functional, amino acid technology, applied in the fields of peptides, applications, peptide/protein components, etc., can solve the problems of unclear active ingredients, insufficient attention to resources, and difficulty in deep utilization, and achieve good market prospects and good blood pressure lowering effect.

Inactive Publication Date: 2011-12-14
CHENGDU UNIV OF TRADITIONAL CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to my country's historical background, Japan's development and utilization rate of pig blood is about 50-60% (mainly according to the records of Materia Medica, it is developed into medicine after deep processing with modern biotechnology), and the main reason is that the country does not pay enough attention to this resource , the active ingredient is not clear, it is difficult to use deeply

Method used

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  • Functional peptides and their uses
  • Functional peptides and their uses
  • Functional peptides and their uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 In vitro enzymatic hydrolysis of pig blood simulating in vivo metabolism

[0034] The main component of pig blood after drying is protein, with a content of nearly 20%, among which hemoglobin in blood cells accounts for 75% of the total protein in whole blood. After hemoglobin is hydrolyzed, it is degraded into small molecule peptide compounds with different chain lengths. The main color and odor substance in pig blood is heme, which seriously interferes with the extraction and separation of effective substances, content determination, molecular weight detection and other research. When pig blood enters the human body, it is first degraded by digestive enzymes into relatively stable polypeptides (molecular weight range is 0.1kDa ~ 10kDa). Small peptides with a molecular weight of less than 3kDa are usually biologically active, and these small peptides are also easily absorbed by the human body. This kind of small peptide is also a common substance for the eff...

Embodiment 2

[0112] Example 2 Separation and identification of pig blood blood pressure-lowering functional polypeptide

[0113] The pathogenesis of hypertension is generally considered to be that angiotensinase (ACE) excessively converts angiotensin I (Ang I) into angiotensin II (Ang II) that raises blood pressure, and at the same time, ACE degrades bradykinin, making it inactive. live. Therefore, by inhibiting the activity of ACE, the production of angiotensin II is reduced, and the degradation (inactivation) of bradykinin is resisted, thereby lowering blood pressure. Cushman first proposed ACE from rabbit lung, and established a method for measuring ACE inhibitory activity. Later, many researchers made changes on this basis. In this experiment, the antihypertensive functional polypeptide of pig blood was screened out by simulating the inhibitory effect on ACE in vivo in vitro.

[0114] In this experiment, after separation by gel filtration, RP-HPLC was used for fine separation. The se...

Embodiment 3

[0165] Example 3 Pharmacological Verification of Antihypertensive Peptide

[0166] The antihypertensive peptides with ACE inhibitory activity confirmed by in vitro experiments do not necessarily all have antihypertensive effect in vivo. Antihypertensive peptides must enter the blood circulation to exert their antihypertensive effect. If taken orally, they are easily decomposed by enzymes in the digestive tract or degraded by ACE first, and may become inactive short peptides or amino acids. Can the antihypertensive peptide obtained in the present invention successfully pass through the barrier of the gastrointestinal tract? Through in vivo experiments such as animal experiments or clinical trials, the effect of the hypotensive peptide can be more accurately judged.

[0167] In previous experiments, 6 hypotensive peptides with ACE inhibitory activity have been obtained. In order to further verify the actual antihypertensive effect of these antihypertensive peptides, this exper...

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Abstract

The invention belongs to the field of biopharmaceuticals, particularly relates to a functional polypeptide and application thereof, and aims at providing a new functional polypeptide. The technical scheme of the invention provides the functional polypeptide. The functional polypeptide is (1) a polypeptide with an amino acid sequence shown in SEQ ID No 1, or (2) a polypeptide which is subjected tosubstitution, lose or addition of one or more amino acids based on the amino acid sequence shown in the SEQ ID No 1 and has the same or similar functions. In-vivo and in-vitro tests prove that the polypeptide has excellent effect of anti-hypertension, can be prepared into an antihypertensive medicament, and provides a new effective choice for the antihypertensive field.

Description

technical field [0001] The invention belongs to the field of biopharmaceuticals, and specifically relates to a functional polypeptide and its application. Background technique [0002] Pig blood has a long history of medicinal use. Since the Han Dynasty, the herbal medicines of all dynasties have listed pig blood separately, and recorded its medicinal effects: "replenishing blood and nourishing the heart, calming wind and calming convulsions, lowering qi, and stopping bleeding" and so on; At the same time, a large number of proven prescriptions are also included. Folks also widely consume pig blood to prevent and treat diseases. Modern research also shows that pig blood not only contains 18 kinds of amino acids including 8 kinds of amino acids necessary for the human body, but also has high nutritional value. It can also treat anemia, leukemia, reduce blood lipids, and promote wound healing. However, at present, people mainly use the edible properties of this variety, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K7/06C12N15/12C12N15/63A61K38/08A61P9/12
Inventor 国锦琳任艳万德光
Owner CHENGDU UNIV OF TRADITIONAL CHINESE MEDICINE
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