According to a new report from the Department of Hematology, Mayo Clinic, Rochester, Minnesota, USA, EGCG, a polyphenol antioxidant in green tea, helps to kill cells of B-cell chronic lymphoblastic leukemia (B-CLL). B-cell chronic lymphocytic leukemia; B-CLL is the second most common hematological tumor in American adults.
Researchers have found that EGCG can kill blood cancer cells by blocking their communication signals. This research report was published in the online magazine Blood on March 2, 2004.
Chronic lymphoblastic leukemia is most often diagnosed at the age of 65 ~ 69, and chemotherapy is usually used, but the effect is limited. Usually, chronic lymphocytic leukemia is incurable.
In a new study, Mayo Clinic scientists found that chronic lymphoblastic leukemia cells can synthesize and release vascular endothelial growth factor (VEGF; Vascular endothelial growth factor. B cells of chronic lymphocytic leukemia use vascular endothelial growth factor as a survival factor.
Eight out of ten patients with chronic lymphoblastic leukemia showed that EGCG significantly increased the death of leukemia B cells. In addition, EGCG also inhibits protein in B cells of chronic lymphoblastic leukemia. Finally, EGCG also inhibited the phosphorylation of VEGF-R 1 and VEGF-R2. These results show that the signal from vascular endothelial growth factor can regulate the survival signal in chronic lymphocytic leukemia cells, and blocking this autocrine pathway will lead to the activation of caspase, which will lead to the death of leukemia cells. Eight of the ten patients showed that EGCG caused the death of blood cancer cells.
Dr Neil E. Kay, the chief research scientist, said in a statement: "We will continue to explore therapeutic drugs that are non-toxic to patients but can kill cancer cells. This discovery about EGCG is a good starting point. The understanding of this mechanism and these preliminary positive results have given us great motivation to continue our efforts, hoping to provide more effective and harmless treatment drugs for cancer patients as soon as possible. 」
Source: Journal of Blood
Green tea is good for health and has new proof!
According to the latest research by the Institute of Food Science and Technology of National Taiwan University, green tea can improve hyperlipidemia and delay the occurrence of diabetes. People are advised to drink green tea every day. Professor Sun Luxi pointed out in the latest published research that green tea contains polyphenols such as catechins and colorless anthocyanins, which have physiological effects such as deodorization, antioxidation, anti-tumor, lowering blood pressure, lowering blood fat and cholesterol. Taking hamster as an animal experiment, it is found that green tea on the market can reduce serum triglyceride and liver cholesterol, delay the oxidation of low density lipoprotein cholesterol (bad cholesterol), restore the insulin sensitivity of mice, and help to prevent and treat type 2 diabetes.
That is to say, in order to convert the consumption of green tea in the experiment and clearly see the health care function of green tea in a short time, you must drink10,800 cc of strong tea every day, and the concentration is about 250 cc for a bag of tea. Generally, the concentration of green tea drinks on the market is only half. If sugar is added, the effect will be discounted.
People say that "drinking tea can remove oil and reduce fat", and now this statement has been confirmed by the research of Chengda Hospital. The basic principle is that drinking at least 450cc of tea every day can reduce body fat. In addition, Professor Lin Renhui from the Institute of Biochemistry, National Taiwan University School of Medicine also pointed out that the health care function of tea and tea polyphenols is that they can inhibit the synthesis of fat, thus inhibiting the formation of obesity and tumors, showing that tea and tea polyphenols have slimming and anti-cancer effects.
Drinking tea helps to lose weight, but some people think that it is wrong to drink tea to get greasy after eating. Under a normal diet, you can lose weight by drinking a cup after a meal and walking for half an hour. Nutritionists also reminded that it is best to choose green tea, unsweetened oolong tea and Pu 'er tea to reduce fat. The catechin content of black tea is relatively low, and milk tea absorbs unnecessary heat because of adding cream balls, which should be avoided.
Every kind of tea contains tea polyphenols. Tea polyphenols in green tea are called catechins, tea polyphenols in black tea are called theaflavins, and tea polyphenols in Pu 'er tea are called thearubigins. Tea polyphenols in Oolong tea are still under study because of their complex structure. Green tea is unfermented and contains the most catechins. Some fermented teas, such as steamed buns and oolong tea, have the second highest catechin content. Fully fermented tea, such as black tea, has the least catechin content, among which green tea has more tea polyphenols, and the health care effect has been studied the most.
If you don't like tea, or you can't drink a lot of tea, there are actually simpler and more convenient options. For example, there are many green tea extract products or capsule products on the market, but among many brands of green tea products, it is recommended that you choose the brand carefully. Besides paying attention to the hygiene and quality of products, it is more important to pay attention to the content of catechins. For your health, remind you to drink more green tea or supplement green tea products, which will remind you of cholesterol, diabetes and obesity.
The international conference identified six kinds of health products: first, green tea; The second kind of red wine; Third soybean milk; The fourth yogurt; Fifth bone soup; The sixth mushroom soup. Why do you mention mushroom soup? Because mushrooms can improve immune function. In an office, some people always catch a cold, while others never get sick. What is the reason? Is that the immune function is different. Drinking mushroom soup can improve immunity, so it is a health care product. Then why mention bone soup? Bone soup contains donkey-hide gelatin, which can prolong life, so now there are bone soup streets all over the world, but not in China. Don't underestimate bone soup, it can prolong life because it has gelatin. Why did you mention yogurt? Because yogurt is to maintain bacterial balance.
The so-called maintaining bacterial balance refers to the growth of beneficial bacteria and the elimination of harmful bacteria, so eating yogurt can reduce illness. Why does green tea have health care function? It turns out that green tea contains tea polyphenols, which is anti-cancer. Japan's census is particularly good. After their census, they said: People over 40 have no cancer cells in their bodies. Why do some people get cancer and others don't? It has something to do with drinking green tea. If you drink 4 cups of green tea every day, cancer cells will not divide, and even if they do, they will be delayed for more than 9 years. So in Japan, primary school students drink a cup of green tea every day as soon as they go to school. In addition, green tea contains fluorine. What does this fluorine do? The Japanese now understand that it can not only strengthen teeth, but also eliminate decayed teeth and dental plaque. Three minutes after a meal, dental plaque will appear. Now many of us have bad teeth. Not only do we not rinse our mouths with tea, but we don't even rinse our mouths with white water. I don't know what the problem is. Now some people start to lose their teeth at the age of 30, and all their teeth will be lost at the age of 50. The hospital's dentistry is the busiest, and the dental inlay room is the busiest. When we visited Europe, everyone had a good tooth. You see, if your teeth are good, of course you will live long. Many of us have overlooked this point. Actually, you don't have any trouble. You rinse your mouth with tea to remove plaque and strengthen your teeth. When you are old and your teeth are strong, you must not decay your teeth. This is a small matter, so stick to it. Third, green tea itself contains tea tannins, which can improve the toughness of blood vessels and make them not easy to rupture. Many people come to Beijing to treat cerebrovascular accidents. For every four people who die in the hospital, 1 is a cerebral hemorrhage, which is very dangerous. Green tea is the first to fight cancer, the second to strengthen teeth, and the third to prevent cerebrovascular rupture. Why not drink it?
1, reducing fat and weight, preventing cardiovascular and cerebrovascular diseases. Drinking tea is closely related to losing weight. As early as more than 2,000 years ago, Shennong Materia Medica mentioned the slimming effect of tea: "Long-term service, peace of mind, benefiting qi ..... intellectual man fit and not old". Modern scientific research and clinical experiments have proved that drinking tea can reduce blood lipid and cholesterol and make the body lighter. This is because the comprehensive coordination of phenolic derivatives, aromatic substances, amino acids and vitamins in tea, especially the comprehensive function of tea polyphenols, theanine and vitamin C, can promote fat oxidation, help digestion and reduce fat and weight. In addition, tea polyphenols can dissolve fat, while vitamin C can promote cholesterol excretion. Green tea itself contains tea gan ning, which can improve the toughness of blood vessels and make them not easy to rupture. A study published in the Journal of Circulation of the American Heart Association in May 2002 shows that drinking tea regularly can reduce the risk of dying of heart disease. Researchers from Harvard Medical School in the United States conducted a follow-up survey on 1900 patients with heart disease, mainly the elderly over 60 years old. The survey found that those who drink more than 65,438+04 cups of tea per week have a lower risk of death within about three and a half years after a heart attack than those who don't drink tea. The study also shows that even if patients drink less than 14 cups of tea per week, it may reduce the death rate of heart disease by 28%.
2. Anti-cancer. Green tea contains tea polyphenols and caffeine, which have comprehensive effects, not only refreshing, but also improving human immunity and anti-cancer. In recent years, the American Chemical Society has always found that tea has an inhibitory effect not only on digestive system cancer, but also on skin, lung and liver cancer. It has been confirmed by scientific research that the organic anticancer substances in tea mainly include tea polyphenols, theophylline, vitamin C and vitamin E; The inorganic anticancer elements in tea mainly include selenium, molybdenum, manganese and germanium. Scientists in China and Japan believe that catechins in tea polyphenols have the best anticancer effect.
3. Anti-poison sterilization. The use of tea as a good antidote can be traced back to the ancient Shennong era (about 2737 BC). The saying that "Shennong tasted a hundred herbs and encountered 72 poisons every day, and solved them with tea" is recorded in Records of the Historian Huang San, Huai Nan Zi Xiu Wu Xun, Herbal Yi Yan and other books. Cha Sheng Lu Yu pointed out in the Book of Tea, the world's first authoritative work on tea science, more than 1200 years ago (AD 780), "Tea is the most suitable drink because it is cold ... If you feel hot, thirsty, stuffy, headache, tired eyes, tired limbs and uncomfortable joints, drink it four times. The above symptoms listed by Lu Yu are very close to typical pneumonia or suspected cases. Chen Zangqi, a medical scientist in the Tang Dynasty, wrote in Materia Medica: "Quench thirst and eliminate epidemic diseases. Expensive tea also. Liu Ye, a famous eunuch, listed "eliminating furuncle with tea" as one of the ten virtues of tea. Since the Tang Dynasty, there has been a new narrative in the study of tea by doctors in past dynasties, which is similar to detoxification and sterilization with tea. However, due to the underdeveloped science at that time, infectious and epidemic diseases were collectively called "plague" or "furuncle". Although bacteria and viruses are not specified, it has been proved that drinking tea is helpful for detoxification and sterilization. The research on the health care function of tea has been deepened in modern medical circles. In 2003, American scientists reported in the Journal of the American Academy of Sciences that "the chemical substance named' theanine' in tea can enhance the anti-infection ability of human body by five times".
4. Long life. The anti-aging effect of green tea on human body is mainly reflected in the coordination of several effective chemical components and various vitamins, especially tea polyphenols, caffeine, vitamin C, aromatic substances, lipopolysaccharide and so on. , can enhance human myocardial activity and vascular elasticity, inhibit arteriosclerosis, reduce the incidence of hypertension and coronary heart disease, enhance immunity, thus anti-aging and longevity. Medical research shows that tea polyphenols can not only reduce the contents of cholesterol and triglycerides in blood, but also enhance the toughness and elasticity of microvessels and reduce blood lipids, which is extremely useful for preventing and treating common diseases of middle-aged and elderly people such as hypertension and cardiovascular diseases. Tea contains selenium, and it is organic selenium, which is more easily absorbed by people than selenium in grain and oil. Dr Richard Paixiwat of the United States believes that adding selenium to food, combined with vitamin C and vitamin E, can prolong people's life, and tea is rich in these strange elements that are beneficial to life.
Birth, old age, illness and death are irresistible laws. The so-called "longevity" is false, and "longevity" is true. There are countless examples of longevity by drinking tea. According to Song? According to Qian Yi's Annals of New South Wales, in the third year of Emperor Xuanzong of the Tang Dynasty (AD 849), there was an old monk/kloc-0 in his thirties in Du Dong (now Luoyang, Henan). The emperor asked him how to keep in good health. He said, "I have few ministers and many ministers, and I don't know medical skills, so I am good at tea. As long as tea is everywhere, or I encounter more than 100 bowls of tea every day, as usual. " Qianlong was the longest-lived feudal emperor in China, who reigned for 60 years and lived to be 89 years old. Drinking tea is one of his health recipes. Su Juxian, the oldest birthday girl in Shanghai and the last scholar in the late Qing Dynasty, insisted on drinking tea as a big habit all his life. He lived to the age of 108 (according to the radical of the Chinese character "tea", it can be divided into "rice" and "eighty-eight", which is 108). 1994 Yuan Dunzi and Wang, a couple aged 104 who won the title of "Longevity Couple" in Shanghai, also drink tea every day, usually at 10 and 3 pm every morning. Born in 1896, Zhang Shun, a centenarian in Gaozhou, Guangdong Province, has four noes: no smoking, no drinking, no overeating and no picky eaters; Sixi likes coarse grains, sweet potatoes, jealousy and tea. 1898 Born in Fengshun County, Guangdong Province on August 20th, Zhang is a hardworking and long-lived woman who never smokes, drinks or drinks tea. Professor Wu Juenong, honorary chairman of China Tea Society, known as "contemporary Cha Sheng", celebrated his 90th birthday. When talking about the mystery of longevity of himself and his wife, he gave the answer of drinking more tea and eating more fruit. (Press: Wu Lao lived to be 9 1 year old, and his wife Chen lived to be 98 years old. ) The famous mathematician, consultant of Shanghai Tea Society and Professor Su of Fudan University lived to be 65,438+0,065,438+0 years old. Drinking tea after breakfast every morning is a way for him to live a long and healthy life. Mr. Cui Guiyong, President of Luyu Tea Classics Research Association of Korea, loved tea on weekdays and lived to 100 years old (died on April 5, 2002). In the northwestern Indian city of Gapur, there was an old man named Habibou Mian, whose age was officially recognized by the local government as 125. When telling the secret of his longevity, the old man Mian talked about his eating habits. "I never smoke. Drinking tea is my only addiction." There is a farmer's birthday girl named Zanadi michal in Egypt. He drinks more than 6 cups of tea every day, but he is lucky to live to be 130! Deng Xiaoping, a politician with ups and downs, loves to drink green tea. Deng Xiaoping's sister Deng Xianqun once recalled Deng Xiaoping's life during the Cultural Revolution and said, "My eldest brother likes drinking tea. He likes to drink green tea produced in Sichuan and Anhui, and sometimes drinks West Lake Longjing tea. Tea is still relatively expensive. He put a lot of tea in the cup, which will take up two-thirds of the cup when it is completely soaked. My eldest sister-in-law makes a cup of strong tea for my eldest brother every morning. When my eldest brother finishes drinking, my eldest sister-in-law will continue to drink the remaining tea roots and make him another cup in the afternoon. " The ancients called tea a medicine for all diseases. Tea can preserve health and prolong life, but it is important to persist and persevere, and you will see the effect. Drinking tea has a hundred benefits but no harm.
Although drinking green tea is good, there are still many regrets: 1, green tea is easy to oxidize and difficult to preserve. Tea polyphenols in green tea are strong antioxidants, so it is easy to nourish itself. Although the reason why tea polyphenols can make people live longer is still inconclusive, the tea brewed from oxidized old tea is coffee red, without tea fragrance, and the taste is greatly deteriorated. 2. Most people drink tea weakly and are not used to strong tea. Therefore, for the sake of health, the amount of tea they drink is insufficient. 3. Beware of "urea tea". What is "urea tea"? A few years ago, there was demand for tea, and tea farmers in some places had "technological innovation". After picking tea every morning, spray urea solution on the tea tree in the afternoon, and the tea will grow very long the next morning. This cycle leads to a sharp increase in tea production. Therefore, when drinking tea, we must recognize the brand and the quality, and we must not be greedy and cheap.
Drink a cup of light green tea in the morning to refresh yourself.
The benefits of tea are as follows:
The chemical composition of tea is composed of 3.5-7.0% inorganic matter and 93-96.5% organic matter. There are about 27 kinds of inorganic mineral elements in tea, including phosphorus, potassium, sulfur, magnesium, manganese, fluorine, aluminum, calcium, sodium, iron, copper, zinc and selenium. Organic compounds in tea mainly include protein, lipids, carbohydrates, amino acids, alkaloids, tea polyphenols, organic acids, pigments, aroma components, vitamins, saponins and sterols.
Tea contains 20-30% leaf protein, but only about 3.5% can be dissolved in tea soup. Tea contains 1.5-4% free amino acids, and there are more than 20 kinds, most of which are essential amino acids for human body. Tea contains 25-30% carbohydrates, but only 3-4% can be dissolved in tea soup. Tea contains 4-5% lipid, which is also necessary for human body.
Drinking green tea often is good for the fetus.
Drinking green tea is good for health when watching TV or sitting in front of a computer.
But the precautions for drinking tea:
It is worth noting that drinking tea must be moderate, and excessive drinking tea will affect the absorption of iron. It is best to drink tea with warm boiled water of about 80℃-85℃ while soaking. Don't brew too much or leave it for too long, it's not easy to be too thick every time. It is advisable to drink it several times.
Drinking green tea is good. The anti-aging effect of green tea on human body is mainly reflected in the coordination of several effective chemical components and various vitamins, especially tea polyphenols, caffeine, vitamin C, aromatic substances, lipopolysaccharide and so on. To achieve the purpose of reducing fat and weight and preventing cardiovascular and cerebrovascular diseases.
Drinking green tea can also prevent radiation. 2. Rich in vitamin C, caffeine and theanine, it has the functions of antioxidation and neutralization of free ions, so it has certain curative effect on black spots, wrinkles and freckles. 3. Rich in aromatic compounds, it can dissolve fat, remove turbidity and greasy, and prevent fat from accumulating in the body. In addition, green tea can increase the metabolism of body fluids, nutrients and calories, strengthen microvascular circulation, and reduce fat deposition in the body. Long-term drinking can make people become fit. The most important thing is that it has the benefit of preventing tumors. 5. Green tea also has the effect of improving eyesight ~