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Application of the substance for detecting or regulating the expression level of lactoferrin in the preparation of drugs or kits for preventing and/or treating cardiovascular and cerebrovascular diseases

A lactoferrin and expression technology, applied in the field of medical molecular biology, can solve the problems of unseen research reports and applications of lactoferrin, and achieve improvement of plaque formation, simple detection method, detection specificity and sensitivity high effect

Active Publication Date: 2021-11-09
KUNMING INST OF ZOOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lactoferrin is a natural protein in animal colostrum. It is a multifunctional protein that has broad-spectrum antibacterial, antiviral infection, can regulate the balance of iron in the body, regulate the immune function of the body, and inhibit human tumor cells. There are still no research reports and applications on lactoferrin in cardiovascular diseases

Method used

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  • Application of the substance for detecting or regulating the expression level of lactoferrin in the preparation of drugs or kits for preventing and/or treating cardiovascular and cerebrovascular diseases
  • Application of the substance for detecting or regulating the expression level of lactoferrin in the preparation of drugs or kits for preventing and/or treating cardiovascular and cerebrovascular diseases
  • Application of the substance for detecting or regulating the expression level of lactoferrin in the preparation of drugs or kits for preventing and/or treating cardiovascular and cerebrovascular diseases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Lactoferrin detection kit.

[0041]The assay method is a conventional enzyme-linked immunosorbent assay (ELISA), and the brief steps are as follows: take 1 μl of 1000-fold diluted atherosclerotic mouse plasma and 99 μl of coating solution (50 mM carbonate buffer, pH 9.6) After mixing, add to the wells of a 96-well microplate (Nunc, Denmark) and coat overnight at 4°C. The next day, the solution in the well was discarded, washed with 0.1M phosphate buffer three times, and then blocked, and then anti-lactoferrin rabbit polyclonal antibody (10 μg / ml) was added and incubated at 37°C for 60 minutes. After washing to remove unbound antibodies, horseradish peroxidase-labeled anti-rabbit IgG secondary antibody (KPL, USA) was added, and finally tetramethylbenzidine (TMB) was used for color reaction. Use a series of standard lactoferrin diluted by gradient to do the standard curve to calculate the concentration of lactoferrin in the plasma sample measured (results see figure 1 ,...

Embodiment 2

[0043] Lactoferrin detection kit.

[0044] The assay method is a conventional enzyme-linked immunosorbent assay (ELISA), and the brief steps are as follows: take 1 μl of 1000-fold diluted ischemic stroke patient (IS), atherosclerosis patient (CHD) and normal human plasma (Normal ) was mixed with 99 μl of coating solution (50 mM carbonate buffer, pH 9.6), added to the wells of a 96-well microplate (Nunc, Denmark), and coated overnight at 4°C. The next day, the solution in the well was discarded, washed with 0.1M phosphate buffer three times, and then blocked, and then anti-lactoferrin rabbit polyclonal antibody (10 μg / ml) was added and incubated at 37°C for 60 minutes. After washing to remove unbound antibodies, horseradish peroxidase-labeled anti-rabbit IgG secondary antibody (KPL, USA) was added, and finally tetramethylbenzidine (TMB) was used for color reaction. Use a series of standard lactoferrin diluted by gradient to do the standard curve to calculate the concentration ...

Embodiment 3

[0046] Determination of lactoferrin content in plasma of ischemic stroke patients (IS), atherosclerosis patients (CHD) and normal subjects (Normal).

[0047] The blood plasma of the patients mentioned above who were anticoagulated with 3.8% sodium citrate 1:9 (ischemic stroke patients, n=187, normal people, n=92; atherosclerosis patients, n=40, normal people, n=92) was collected from the hospital. 40) Detect the content of lactoferrin according to the method of Example 2. The result is as figure 2 A in and image 3 As shown in A respectively, the concentration of lactoferrin in the plasma of patients with ischemic stroke and patients with atherosclerosis showed an obvious upward trend (**p<0.01).

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Abstract

The invention relates to the application of a substance for detecting or regulating the expression of lactoferrin in the preparation of drugs or kits for preventing and / or treating cardiovascular and cerebrovascular diseases, and belongs to the technical field of medical molecular biology. The present invention provides the application of substances for detecting or regulating the expression of lactoferrin, and using lactoferrin as a drug target and / or therapeutic target has a good effect on the treatment of stroke, atherosclerosis or other cardiovascular and cerebrovascular diseases , indicating good prospects for application in medicine.

Description

technical field [0001] The invention relates to the technical field of medical molecular biology, in particular to the application of substances for detecting or regulating the expression of lactoferrin in the preparation of drugs or kits for preventing and / or treating cardiovascular and cerebrovascular diseases. Background technique [0002] Lactoferrin (lactoferrin, Lf) is an important non-heme iron-binding glycoprotein, which is mainly expressed and secreted by mammary epithelial cells. Its molecular weight is 80kDa, and it belongs to the transferrin family. Lactoferrin is a natural protein in animal colostrum. It is a multifunctional protein with broad-spectrum antibacterial, antiviral infection, can regulate the balance of iron in the body, regulate the immune function of the body, and inhibit human tumor cells. There are still no research reports and applications about lactoferrin in cardiovascular diseases. Contents of the invention [0003] The object of the prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/68A61K45/00A61K39/395A61P9/10
CPCA61K45/00A61K2039/505A61P9/10C07K16/18G01N33/6893G01N2333/79G01N2800/32G01N2800/323
Inventor 赖仞唐小芃程若梅吕秋敏
Owner KUNMING INST OF ZOOLOGY CHINESE ACAD OF SCI
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