Cancer Health Wisdom

Could Green Tea Provide A Cure For Cancer?

Wisdom about Health — Sat, 13 Mar 2010 20:11:26 +0000

Cancer is a complex, devastating illness which is responsible for the deaths of millions of people each year. For decades, scientists have been attempting to uncover some of the secrets of cancer in order to find a cure. While, so far, a cure has been out of reach, there appear to be some natural remedies which can prevent or slow cancer growth. One of those remedies is a beverage which is commonplace in many Asian households-tea.
The History of an Anti-Cancer Tool
Tea has been a dietary staple for 500,000 years. People in India and China appear to be among the first to have enjoyed this beloved beverage. But it’s one variety in particular-Camellia sinensis-which appears to have a number of health benefits associated with it. That variety is also known as green tea.
What Makes Green Tea Special
Green tea is unique in that it is produced from unfermented leaves and it contains a high concentration of polyphenols, which are chemicals that can serve as antioxidants. Antioxidants are essentially on a search-and-destroy mission against free radicals, compounds which compromise DNA and destroy cells. Free radicals are often to blame for the development of cancer as well as heart disease. The antioxidants immobilize free radicals and inhibit the damage often associated with them.
Medicinal Uses of Green Tea
For years, Asians have used green tea to promote a healthy lifestyle. It helps to promote good digestion, improve concentration, and promote the excretion of urine. In addition, a number of studies in human beings, animals, and in laboratories suggest that green tea can be effective in combating a number of ailments.
Green Tea’s Effect on Cancer of the Pancreas and Colon
In an article entitled, “Green Tea Consumption and the Risk of Pancreatic and Colorectal Cancers,” researchers B.T. Ji, W.H. Chow, A.W. Hsing, J.K. McLaughlin, Q. Dai, Y.T. Gao, W.J. Blot, and J.F. Fraumeni, Jr. examined the question of green tea’s effectiveness as an antidote to certain types of cancers.
The Columbia University researchers conceded that the effect of green tea on cancer risk is uncertain, although a number of animal studies seem to indicate a positive effect.
In order to test the hypothesis that drinking green tea can, in fact, lessen cancer risk, the researchers conducted an extensive study in Shanghai, China in order to see whether green tea consumption had any impact on cancers of the colon, rectum, and pancreas.
The research team found that the greater the consumption of green tea, the lesser the risk of cancer. As a result, it appears that green tea may, in fact, lower the incidence of both colorectal and pancreatic cancers. Yet, it should be noted that other similar studies have produced conflicting results. As a result, scientists recommend additional research before a definitive statement can be made about green tea as a colorectal cancer prevention tool.
As far as pancreatic cancer is concerned, another study showed that those individuals who consumed the most green tea were far less likely to develop the disease. It appears that the reduced risk is most pronounced in women, who cut their pancreatic cancer rate in half by drinking large amounts of green tea.
In contrast, male green tea drinkers were 37 percent less likely to develop the disease. However, it should be noted that it is impossible to tell from this particular study whether green tea was solely responsible for cutting pancreatic cancer risk.
Green Tea and Other Cancers
But what about other cancers? How effective has green tea been in preventing other forms of the disease? To begin with, cancer rates are often lower in Japan and other nations where green tea consumption is high. Animal studies also indicate that the polyphenols in green tea are effective antioxidants which kill cancerous cells, stopping them in their tracks.
A study of bladder cancer patients found that those who consumed green tea had a much better five-year survival rate than cancer patients who did not drink the beverage. In addition, animal studies appear to confirm that the chemicals in green tea stop the growth of breast cancer cells.
One study of nearly 500 women with breast cancer found that those who drank green tea did not see their cancer spread as much as those who did not consume green tea. Yet, those who were in the later stages of breast cancer who drank green tea saw little or no improvement in their condition.
Animal studies also indicate that green tea can prevent the growth of cancer cells in the esophagus. But studies in human beings have yielded mixed results. For instance, one study showed that green tea could help prevent esophageal cancer-especially in women, while another indicated that the tea could actually increase the incidence of such cancer.
Consequently, additional research is needed before scientists can determine conclusively whether green tea can act as a cancer preventative.
The effects of green tea on lung and prostate cancer remain unclear. However, the beverage does seem to prevent the onset of skin cancer. There is also some evidence to suggest that it can inhibit the growth of stomach cancer cells.
It appears that green tea may be effective in the fight against inflammatory bowel disease. This is significant because people who suffer from this disease are at a greater risk for colon cancer. Specifically, green tea appears to reduce the inflammation characteristic of ulcerative colitis and Crohn’s disease, two forms of inflammatory bowel disease.
Green Tea and Chemotherapy
There have been lab tests to indicate that green tea can improve the effectiveness of chemotherapy drugs such as doxorubicin and tamoxifen. But the positive effect has not yet been demonstrated in studies of human beings. In fact, green tea and green tea extracts are not recommended for prostate cancer patients who are undergoing chemotherapy.
The Final Word
Although scientific studies at this point are not altogether conclusive, there is strong evidence to suggest that green tea can be effective in preventing cancer. That may be particularly true for colorectal and pancreatic cancers. At this point, a number of doctors agree that, for most people, the health benefits of drinking green tea far outweigh the risks.

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Wisdom about Health — Fri, 12 Mar 2010 11:54:40 +0000

PROSTATE CANCER – NEW TREATMENT BY RADIOTHERAPY
Research is continuing to try and improve technology and techniques to allow radiotherapy to the prostate gland to be more effective and to have fewer side effects. One way is to reduce the amount of radiation received by normal organs (bladder, bowel etc) and this has been improving over the last few years with better machines and techniques such as “conformal radiotherapy” and “IMRT”.
Work is also being carried out on combining brachytherapy with external therapy to allow some of the benefits of brachytherapy (fewer side effects, higher overall dose to the prostate cancer) to be used for men with more advanced prostate cancer without compromising the chance of cure.
NEW HORMONE THERAPY FOR PROSTATE CANCER
Some newer prostate cancer hormone treatments have fewer side effects than older hormone based drugs. Some are also felt to be more effective. All the time researchers are testing to try and find the best hormone tablets or injections for use in prostate cancer.
Other research is going on to try and work out the best time to give hormone treatment in prostate cancer and whether it is best to combine this treatment with other types of treatments such as chemotherapy or radiotherapy. Trials are currently being run to answer these questions and the results should be available in the next few years.
IMPROVEMENTS IN CHEMOTHERAPY TREATMENT FOR PROSTATE CANCER
In the past prostate cancer did not respond very well to chemotherapy drugs. However now there are newer drugs which are more powerful against prostate cancer and these have started to be used with more frequency in late prostate cancer which has already spread to other organs and which has become resistant to hormone treatments. The best drug found so far is Docetaxel, a new type of chemotherapy drug. It has several side effects including hair loss, nausea and risk of infection. Doctors are now looking to see if Docetaxel would work even better as a combination with other drugs.
USE OF BISPHOSPHONATE DRUGS FOR PROSTATE CANCER TREATMENT
These are a group of drugs which are most often used in treating osteoporosis. It has been recently found that they can also help reduce pain associated with cancer deposits or secondaries in the bones. They may also help reduce the risk of these abnormal bones from breaking or fracturing, by slowing down the damage caused to the bone by the cancer.
Research is ongoing to look at which of these drugs is the best for treating prostate cancer with bone disease and when the best time to start treatment with these drugs is.
ALTERNATIVE TO SURGERY FOR TREATMENT OF EARLY PROSTATE CANCER
There are 2 new treatments which are being researched as an alternative to surgery for some men with localised prostate cancer. Both options would not require a general anaesthetic (you would not need to be put to sleep) making them lower risk. Both treatments also have fewer side effects than radical surgery (”prostatectomy”). However neither has been in use long enough to know if it will prevent prostate cancer from coming back as effectively as standard treatments (surgery and radiotherapy).
Cryotherapy is the killing of cancer cells by freezing them. Needles are inserted into the prostate gland under local anaesthetic and liquid nitrogen is passed along them to freeze the prostate and the cancer cells within it. Currently it is being used for men whose prostate cancer has come back despite a first more conventional treatment and so is only being trialled for use as a first treatment option.
HIFU stands for high frequency ultrasound. Here ultrasound waves are directed to where there are cancer cells and are these are used to heat them up, thus killing them. In prostate cancer the ultrasound probe would be put into the back passage and from here ultrasound waves would be fired towards the prostate gland. The results so far have been good in that the treatment is safe and effective.
NEW TREATMENTS FOR PROSTATE CANCER IN VERY EARLY STAGES OF DEVELOPMENT
There are a number of alternative treatments which are still at a highly experimental stage of development. Gene therapy aims to replace the faulty genes in cancer cells with good ones which would allow the cell to self destruct if it felt it had become too mutated. (Cancer cells have lost this self destruct ability and continue to grow and divide despite having many abnormalities which would normally force the cell to die.) Vaccine treatment looks at ways of making the bodies own immune system recognise and kill cancerous sells. Endothelin blockers are a new type of drug treatment which works by preventing the prostate cancer cells to grow.
Many people may have heard that Vitamin D is being used in the treatment of prostate cancer however this therapy is in the very early experimental stages and is no where near being used in clinics as a cancer treatment. Vitamin D has been reported to block receptors on prostate cancer cells thereby slowing the rate of their growth but there is NO clinical evidence that this is in fact the case. Some researchers claim that the active form of Vitamin D slows the growth of prostate cancer but as yet this has only been tested on mice and other small animals.
Beta-sitosterol is a herbal remedy that people have started to associate with prostate cancer treatment. This natural plant fat has apparently been proven effective for the treatment of an enlarged prostate but not necessarily prostate cancer. According to research Beta-sitosterol MAY help to prevent the emergence of prostate cancer but this has not been clinically proven yet.

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