Sterol(English: sterol)Also called sterol, it issteroidOne type ofhydroxylSteroids.They all useCyclopentane phenanthreneIt is the basic structure and contains hydroxyl, so it is called sterol compound.
useAlkaline solutionTo extract lipids from animal and plant tissues, there are often many different substances that cannot be saponified by alkali.There are many kinds of sterols, which are widely distributed in the biological world.ascholesterolIs highAnimal cellImportant components of.It is related toLong chain fatty acidsThe cholesterol ester formed isPlasma LipoproteinAnd important components of cell membrane.plant cellThe membrane contains other sterols such asStigmasterolAnd sitosterol.Fungi and yeasts contain mycosterols.
Chinese name
Sterol
Foreign name
sterol
Alias
sterol
chemical formula
Consisting of three hexane rings and one cyclopentane
Class I consists of three hexane rings and oneCyclopentaneFusedCyclopentane phenanthreneDerivatives.It is widely found in the cells and tissues of animals and plants except for bacteria.
causeInsect moltingOfEcdysinAnd antistaphylococcusIt is also a sterol compound.ColumbusThe frog toxin secreted by Phyllobates aurotaenia can be blocked with only a small amountNerve impulseConduction between nerves and muscles.The end product of cholesterol metabolism in the body isbile acidAnd other sterolsBiotransformationIncrease its polarity and expel it from the body[1]。
sterol
sterol
Sterol is an important natural active substance widely existing in organisms, which can be divided into animal sterols, plant sterols and fungus sterols according to the source of raw materials.Animal sterols are mainly cholesterol, while plant sterols are mainly sitosterol, stigmasterol, rapeseed oil sterol, etcErgosterolIt belongs to fungus sterol.
Phytosterol
PhytosterolIt is widely found in roots, stems, leavesfruitAnd seed, yesplant cellThe components of the membrane contain sterols in all oils from plant seeds.Phytosterols are insoluble in water, alkali and acid, but soluble inEther, benzene, chloroformethyl acetate、Petroleum etheretc.Organic solventin[2]。
physiological function
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Prevention of cardiovascular diseases
Excessive intake of animal food or human regulatory function disorder will lead to high serum cholesterol concentration, which is easy to cause hypertension and coronary heart disease.Phytosterol can promote cholesterol dissimilation, inhibit cholesterol biosynthesis in the liver, and inhibit cholesterol absorption in the intestinal tract, thus preventingCardiovascular diseaseRole of.Cholesterol is also an important component of cell membrane and participates in the transportation of lipids in the blood in the human body.[3]
Tumor inhibition
Phytosterols can blockCarcinogenThe function of inducing cancer cell formation,β - sitosterolPhytosterols and other phytosterols can inhibit the occurrence of colorectal cancer, skin cancer and cervical cancer to a certain extent.
stimulate metabolism
It is related to the reabsorption of renal tubules and maintains the secondary sexual characteristicsAdrenal glucocorticoidIt can increase blood sugar concentration.Promote the absorption of calcium and phosphorus in human and animal intestines
Regulate hormone levels
The biggest function of phytosterol is the hormone like function of "intelligent management". It can show certain hormone activity in the body, but has no side effects of hormones. When the human hormone level is higher than the normal value, phytosterol will "work", showing its role in hindering the absorption of bile hormones, reducing the human hormone level. When the human hormone level is lower than the normal value,Phytosterol will be "transformed" into all hormones in the human body, improving the level of human hormones, so as to achieve balance.Common phytosterols include fructus trichosanthis (commonly known as hanging melon seeds), etc.Regulate human hormone level, and have special effects in anti-aging and other aspects[4]。
