Monday, April 13, 2009

Effect of Tea Consumption Health : Tea and cancer

Tea has been considered as a beverage as cancer preventive activity such as has been demonstrated in many animal models.
Models include skin cancer, tuberculosis, esofagus, stomach, liver, small intestine, pancreas, kolon, urine bag, prostat, and gland milk. The solution usually given to the animals as the sole source of liquid water.

Extensive studies on tumorigenesis in the induction of UV light and chemicals, as tuberculosis is one tumor induction and chemicals that occur spontaneously in mouse have indicated that tea has a wide inhibitori activity against tumorigenesis and effective when the administration during a phase insiasi, promotion or progresi karsinogenesis. This conclusion may also be applied to other models.
The results have been reported about the opposite effect on the tea karsinogenesis kolon; retardation and less obstacles they have been reported. Retardation of the milk gland tumorigenesis is one of chemical induction by tea has been the observation in mice that were given high fatty food. EGCG has been shown prevent the growth of cells and breast cancer human prostat.

Many mechanisms have been proposed about the action against inhibitori tea karsinogenesis. Mechanism is the most common activity antioksidatif, but many other mechanisms are also important. Antiproliferatif effects of tea catechin has been demonstrated on the model and the tuberculosis skin tumorigenesis in mice. Obstacles tranformasi cells and cell growth by catechin and theaflavin pure also has been reported.

Activity that has been linked to the major activities of activator protein 1 (AP-1). Because AP-1 activation that is often in many human cancers, this action may be applied to human cancer prevention. Retardation enzyme associated with tumor promotion, such as ornithine decarboxylase, protein kinase C, lipoksigenase and sikloosigenase by tea has been shown. Relationships between the decrease in body fat by tea and tumorigenesis barrier in the skin have been observations.

mouse that drinking black tea or green tea has a tumor tuberculosis fewer and less weight than controls, although they consume the same amount of food or more. Based on the varied activities inhibitori who have diobservasi in animal models of different culture and different cancer cells, it may be that the uterus and the mechanisms involved in the multiple barriers karsinogenesis.

Effect on the nutrition
On mouse obesity, consumption of tea for 10 weeks have a lot to prevent obesity and fat. Absorpsi nutrien decreases and the burning of energy may be increased in both constribution effect.

Green tea extract stimulated thermogenesis has adiposa network in the rat to a level that is greater than can be done by caffeine alone. Ingesti green tea extract by young men with healthy food each produce a significant increase in the burning of energy 24 hours.

This study has indicated that polifenol tea hamper activity catechol O-methyltransferase and synergistic with caffeine reacts to extend simpatetik stimulation of thermogenesis.
Whether the consumption of tea absorpsi protein in humans still needs further investigated. Afinitas because of the strong ties of tea against polifenol ion-metal ion, an effect that may be in the tea absorpsi nutrien is very important.

The decline in iron absorpsi because tea has been reported. Effect seems to be mainly in the nonheme iron, and iron and when the tea is consumed at the same time. Heme iron Absorpsi from cooked meat that is not affected by tea consumption.

Among women aged 65-76 years, tea consumption associated with the measurement of bone mineral density is greater, which is consistent with reports that the tea is Protective against fraktura hipbone.

The data indicate that components other than polifenol, such as fitoestrogen or fluorida, may affect bone mineral density. Tea found glukosiltransferase prevent activities from streptokokki oral and dental caries development in rats. Tea contains fluorida that may akan strengthen tooth enamel and improve dental health.

In the mouse model arthritik reduce collagen, polifenol green tea in a significant incidence reducing illness and arthritis. Inflamatori expression of mediators that include siklooksigenase-2, Interferon gamma, and TNF-alpha on the lower joints arthritik from mouse are polifenol green tea. Cataracts, which develop as a result presipitasi protein in the lens, may reduce by the increased consumption of tea .

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