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Application of KLF4-based salidroside to resisting vascular endothelial cell senescence

A technology for endothelial cells and salidroside, which is applied in the field of medical inventions to achieve the effects of increasing the level of reactive oxygen species, accelerating the aging process of endothelial cells, and consistent results of fluorescence intensity detection and statistics.

Pending Publication Date: 2019-09-17
GUIZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many modern pharmacological studies of salidroside have confirmed that it is a characteristic drug resource that can protect the vascular endothelium, regulate and improve the homeostasis of endothelial function, and intervene in the regulation of body aging, but its effect mechanism needs to be further explored and analyzed

Method used

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  • Application of KLF4-based salidroside to resisting vascular endothelial cell senescence
  • Application of KLF4-based salidroside to resisting vascular endothelial cell senescence
  • Application of KLF4-based salidroside to resisting vascular endothelial cell senescence

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Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1 Materials and methods

[0052] Isolation, culture and passage of human umbilical vein endothelial cells

[0053] Human umbilical vein endothelial cells (Human Umbilical Vein Endothelial Cells, HUVECs) were purchased from SCIENCELL, USA. After the endothelial cells were thawed and recovered, they were transferred into cell culture flasks under aseptic conditions, and culture medium containing neonatal calf serum was added and placed in a 37°C, 5% CO2 incubator for static adherent culture. The culture medium was changed every 2 days, and when the cells grew to confluence, they were digested and passaged with 0.25% trypsin. Take 4-6 generations of subconfluent cells. Dilute the cells to 1×10 with low-glucose DMEM medium containing 10% calf serum 5 Cells / ml, and then 2ml / well of the cells were seeded into a 6-well culture plate, and after the cells grew and fused, the culture medium with different conditions was used for experiments.

[0054] Experimental D...

Embodiment 2

[0171] The measurement of embodiment 2 cell viability

[0172] In order to determine the optimal concentration and time of the drug acting on the cells, the cell viability was detected by the MTT method. Homocysteine ​​(Hcy) 500μM acted on endothelial cells for 48 hours, and the cell viability was significantly reduced ( figure 1 A, B). After treatment with different doses of salidroside and positive drugs, the cell viability was significantly improved ( figure 1 C). The LDH leakage test was used to detect the degree of cell membrane damage. After Hcy was treated for 48 hours, the leakage of LDH increased significantly, and the leakage of salidroside could be reduced to varying degrees ( figure 1 D), showing that salidroside has a certain protective effect on endothelial cell damage caused by Hcy.

Embodiment 3

[0173] Example 3 Determination of Intracellular Active Oxygen Levels

[0174] Under the action of various stimulating factors and various pathological conditions, a large number of oxygen free radicals are produced in the body, and the content of active oxygen increases, forming a state of oxidative stress. Endothelial cells are exposed to high concentrations of oxidative stress conditions for a long time, which eventually leads to damage and dysfunction. To evaluate the inhibitory effect of salidroside on the Hcy-induced increase in ROS levels, DCFH-DA fluorescent probe was used to detect ROS levels in endothelial cells. Hcy stimulated endothelial cells for 48 hours, the level of reactive oxygen species was significantly increased, and the level of reactive oxygen species was significantly reduced after drug treatment ( figure 2 A). The statistical results of fluorescence intensity detection were consistent ( figure 2 B).

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Abstract

The invention relates to an application of KLF4-based salidroside to resisting vascular endothelial cell senescence, in particular to an application of salidroside to respects of endothelial cells damage caused by Hcy, restraining of active oxygen level rise induced by Hcy, preparations for resisting vascular endothelial cell senescence and the like. The result indicates that the salidroside exerts important effects in the endothelial cells senescence induced by Hcy, and the mechanism of the salidroside is mainly based on adjustment and control of a transcription factor KLF4.

Description

technical field [0001] The invention relates to the field of medical inventions, in particular to the application of a KLF4-based salidroside in anti-aging of vascular endothelial cells. Background technique [0002] In June 2013, "Cell" magazine pointed out that aging at the overall human level has become the most important risk factor for cardiovascular diseases, diabetes, tumors, and neurodegenerative diseases [1] , indicating that endothelial cell senescence is closely related to cardiovascular disease. With the rapid increase of aging population, aging-related diseases seriously threaten people's life and health [2] Among them, atherosclerosis (Atherosclerosis, AS) is the pathological basis of cardiovascular events, and its pathogenesis is still unclear. At present, it is more inclined to think that AS is a chronic vascular inflammatory disease [3] . Studies have shown that with the damage of endothelial cells, the renewal of endothelial cells is accelerated, causin...

Claims

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Application Information

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IPC IPC(8): A61K31/7032A61P9/00
CPCA61K31/7032A61P9/00
Inventor 张彦燕沈祥春陶玲徐旖旎黄勇攀
Owner GUIZHOU MEDICAL UNIV
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