Tuesday, May 17, 2011

Article on A Vitamin

By Dominic Bowen


Vitamin A deficiency can end up in night blindness and blindness thanks to the eradication of the cornea.

The capability of vitamin A to stop these 2 visible difficulties and its mechanism of action in doing so is well known. Modern reports suggest that vitamin A may affect some visible troubles in folk who aren't vitamin A-deficient. Sorsby's fundus dystrophy ( SFD ) is a retinal degeneration disorder which may cause night blindness and shares likenesses with age-implicated macular degeneration. Macular degeneration is the most common cause of loss of vision in the old.

A Vitamin In an SFD family, it was found that vitamin An at fifty thousand IU daily resolved night blindness within a week in those members of the family who were at first stages of the illness. The mechanism of this effect isn't clear. Some other observable defects have also shown improvement from the employment of vitamin An analogs.

A Vitamin for Cancer Treatment and Prevention

Vitamin An and retinoids have been discovered to keep back expansion development, particularly those of epithelial origin, in a selection of in vitro ( in a lab dish ) studies. All-trans-retinol has been illustrated to suppress the poisonous behavior of cultured cells transformed by radiation, chemicals or viruses, to obstruct the development of transplanted cancers and to stop malignancy in animals exposed to assorted potent cancer agents.

All-trans-retinoic acid is an authorized drug for the treating of acute promyelocytic leukemia. While the use of retinoids has demonstrated anti-cancer activity for some categories of cancers, it isn't demonstrated to be a universal cancer treatment.

A two year study ( EUROSCAN ) of high-dose retinyl palmitate showed no benefit-in conditions of survival, event-free survival, or secondary first tumors-for patients with head and neck cancer or with lung cancer, a lot of whom were previous or current smokers. The utilization of vitamin An and vitamin An equivalents for cancer treatment is a juggling act between the healing benefits and potential lethality.

A Vitamin Antioxidising properties Vitamin A deficiency has been found to cause oxidative damage to liver mitochondria in rats. Vitamin A has been found to guard against chemical pushed lipid peroxidation in the heart, brain and liver. A Vitamin for immune mechanism support Vitamin A deficiency ends in a reduced resistance to infection having a repercussion on both cell mediated and antibody mediated immunological responses. Nonspecific immune reactions concerning neutrophils, macrophages and natural killer cells, are also influenced by vitamin A deficiency. Retinol might also excite the immune reaction in animals and people who are not vitamin A deficient. In animal studies, high applications of retinyl palmitate have been discovered to excite the nonspecific protection mechanism and improve the antibody answer to explicit antigens. In one study, surgical patients developed lymphocyte growth after a week of treatment with high shots of vitamin A. The effects were only apparent toward the end of the seven day period. Vitamin A's effects on protection seem to be broad. It was demonstrated a number of years ago that high-dose vitamin A can protect against some of the immune-depressing consequences of radiation and cancer chemical treatment. Animal studies, in vitro studies, and some human studies, have shown that vitamin A can protect immune function by helping to maintain the integrity of epithelial barriers to infection and by turning on phagocytes and cytotoxic T-cells. An in vitro experiment showed that a sort of vitamin A found in breast milk represses herpes simplex virus-1.




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