Showing posts with label heart disease. Show all posts
Showing posts with label heart disease. Show all posts

Friday, February 15, 2008

Apples


You've probably heard the old saying "an apple a day, keeps the doctor away," and may have dismissed it as another archaic old wives' tale. But as scientists are discovering, there may be some truth to it! This popular member of the rose family may help fight cancer and heart disease; protect against sunburn, asthma, and diabetes; and relieve constipation. And a recent study found that eating apples during pregnancy can protect your unborn baby from developing asthma and other lung problems later on in life.
Apples' antioxidant flavonoids may help prevent certain types of cancer. When scientists at University of California at Davis added apple extracts to cultures of human endothelial cells (the cells that line our arteries and are the first defense against cancer), the human cells were protected against the effects of tumor necrosis factor (TNF), a compound that triggers cell death and promotes inflammation. The apple extracts actually blocked the signals sent from the tumor that kill cells. The high antioxidant content in apples also helps to eliminate free radicals from the body.
The phenols found in apples may also provide UV-B protection. Studies found that Braeburn apples in particular help protect the skin from sun damage. So eating an apple before going to the beach might be a good way to reduce the risk of sunburn.
Recent studies have discovered apples may have a beneficial affect on lung function in adults and fetuses. One study found that men who ate apples had a lung capacity 138 milliliters greater than those who did not. While another study found that mothers who consumed apples during their pregnancy were less likely to have children who suffer from asthma and wheezing. Scientists believe that the high levels of antioxidants and anti-inflammatory flavonoids, such as quercitin and catechin, are responsible for apples' beneficial affects on lung function, bronchial hypersensitivity and asthma.
Apple season runs from late summer to late fall in the northern hemisphere...
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Tuesday, November 20, 2007

The Heart Can Heal Itself


At the University College London (UCL), scientists have recently discovered that cells from the heart's outer layer can migrate into a failing organ to carry out necessary repairs. This finding highlights the power of stem cells that are readily available in each person's heart and may lead to more effective treatment of serious heart problems.
Ten years ago, a toddler with a heart that was too big and too weak was given a donor heart and her original heart left intact. Recently, her body rejected the donor heart and when the doctors opened her up, they found her heart had healed itself.
The cells that carry out these repairs are called progenitor cells and are controlled by the protein thymosin beta 4, which has already been shown to reduce muscle cell loss after a heart attack. Scientists are now researching ways to manipulate this protein to treat heart disease. Progenitor cells are similar to stem cells because they have the potential to turn into many different types of adult tissue.
In the past, it was thought that to carry out repairs on the heart, progenitor cells needed to be summoned from the bone marrow, but this study puts that theory to rest. The progenitor cells needed to repair the heart are already located within the heart tissue itself.
The UCL team found that progenitor cells under the influence of thymosin beta 4 can be stimulated to create new blood vessels. Dr. Paul Riley, the lead researcher said: "We found that, when treated with thymosin beta 4, these adult cells have as much potential as embryonic cells to create healthy heart tissue." This discovery helps to avoid the risks of immune system rejection when using stem cell transplants from another source because the cells are already located where they are needed.