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Leading researchers to reveal comprehensive dos and don'ts for prostate cancer
October 15, 2007Today at the Prostate Cancer Foundation's Annual Scientific Retreat, researchers will share new findings on how eating common foods such as tomatoes and fish, maintaining a healthy weight, and avoiding meats cooked at high temperatures may help prevent prostate cancer, and help men live healthier and longer after diagnosis. One in six men will be diagnosed with prostate cancer in their lifetime, and an estimated 218,890 cases will occur in The United States this year.
Since the 1980s, researchers have hypothesized that nutrition choices could be connected to prostate cancer. Today, those ideas are being substantiated by more widespread studies, in combination with newer technologies in gene research.
"There are strong indicators in our research that diet and lifestyle are very important with this particular form of cancer," said Meir Stampfer, M.D., Professor of Epidemiology and Nutrition, Harvard School of Public Health. "When we look at men from other cultures like in Asia, the rates of prostate cancer are significantly lower than in the U.S. Yet when these same men move here, within one generation, the rates increase very rapidly. We believe there is a clear correlation to how we live and eat."
June Chan, ScD, of the University of California San Francisco, has been studying the potential impact of fish oil and tomato extracts on the prostate gland prior to and after exposure. "What we're trying to determine is if men with low grade prostate cancer can manage their disease with these kinds of nutritional interventions and delay or avoid the need for more aggressive treatments, all of which carry a risk of side effects that can adversely affect physical function and quality of life," said Chan. "In combination with other studies, the potential we see for these everyday supplements or foods to help men avoid or delay treatment is promising."
This type of approach, often deemed "active surveillance," is a prostate cancer disease management option that monitors prostate-specific antigen (PSA) levels as well as the grade and stage of the tumor until a more aggressive treatment option may become necessary. One-quarter to one-half of all cases of diagnosed prostate cancer in the U.S. and Europe are considered candidates for this kind of approach, which researchers hope leads to better outcomes for patients with low-risk disease. One aspect of this management approach may include specific dietary modifications such as minimizing intake of red, processed or well-done meats.
Angelo De Marzo, M.D., Ph.D., along with colleague William G. Nelson M.D., Ph.D. of the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, have been studying one of the most high profile issues around diet and prostate cancer: don't overheat your meat. "We've known since the 1980s that ingesting meat cooked at very high temperatures can cause cellular mutations, some of which can lead specifically to prostate cancer. What we've found now in the rodent prostate is that the specific areas within the organ that develop cancer after exposure to the meat compounds also first become inflamed and develop a form of atrophy that resembles damaged areas in the human prostate that are likely a very early indicator of a problem." According to De Marzo, if scientists can develop markers of damage and dietary exposures it may be possible for doctors to intervene before cancer ever develops in the prostate.
De Marzo also has some practical advice: "If you're going to eat meat cooked at high temperatures, like I still enjoy, flip your hamburgers more often so the outside does not burn, marinate the meat in ingredients (such as teriyaki sauce) that don't create a crust, precook it in the microwave, or at the least scrape off the charred material." De Marzo also suggests replacing chicken, beef, veal or lamb with soy protein or fish, taking a page from the Asian diet where disease rates are very low. "We need to be realistic: you can help reduce your chance of developing prostate cancer without becoming a vegetarian."
With more widespread testing for prostate cancer using the common PSA test, increasing numbers of new cases are being tracked. The resulting volume of patients, many of whom may have less virulent forms of prostate cancer, is creating a challenge for physicians determined to provide patients with the most appropriate advice - which may not always include aggressive treatment.
"Thanks to funding from the Prostate Cancer Foundation and others like the National Cancer Institute, we're getting closer every day to developing the best protocols for thousands of men with this diagnosis," said Stampfer. Our goal is that any man with low risk prostate cancer can make simple changes that will extend his life and that healthy men can avoid it altogether."
GYMR
June Chan, ScD, of the University of California San Francisco, has been studying the potential impact of fish oil and tomato extracts on the prostate gland prior to and after exposure. "What we're trying to determine is if men with low grade prostate cancer can manage their disease with these kinds of nutritional interventions and delay or avoid the need for more aggressive treatments, all of which carry a risk of side effects that can adversely affect physical function and quality of life," said Chan. "In combination with other studies, the potential we see for these everyday supplements or foods to help men avoid or delay treatment is promising."
This type of approach, often deemed "active surveillance," is a prostate cancer disease management option that monitors prostate-specific antigen (PSA) levels as well as the grade and stage of the tumor until a more aggressive treatment option may become necessary. One-quarter to one-half of all cases of diagnosed prostate cancer in the U.S. and Europe are considered candidates for this kind of approach, which researchers hope leads to better outcomes for patients with low-risk disease. One aspect of this management approach may include specific dietary modifications such as minimizing intake of red, processed or well-done meats.
Angelo De Marzo, M.D., Ph.D., along with colleague William G. Nelson M.D., Ph.D. of the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, have been studying one of the most high profile issues around diet and prostate cancer: don't overheat your meat. "We've known since the 1980s that ingesting meat cooked at very high temperatures can cause cellular mutations, some of which can lead specifically to prostate cancer. What we've found now in the rodent prostate is that the specific areas within the organ that develop cancer after exposure to the meat compounds also first become inflamed and develop a form of atrophy that resembles damaged areas in the human prostate that are likely a very early indicator of a problem." According to De Marzo, if scientists can develop markers of damage and dietary exposures it may be possible for doctors to intervene before cancer ever develops in the prostate.
De Marzo also has some practical advice: "If you're going to eat meat cooked at high temperatures, like I still enjoy, flip your hamburgers more often so the outside does not burn, marinate the meat in ingredients (such as teriyaki sauce) that don't create a crust, precook it in the microwave, or at the least scrape off the charred material." De Marzo also suggests replacing chicken, beef, veal or lamb with soy protein or fish, taking a page from the Asian diet where disease rates are very low. "We need to be realistic: you can help reduce your chance of developing prostate cancer without becoming a vegetarian."
With more widespread testing for prostate cancer using the common PSA test, increasing numbers of new cases are being tracked. The resulting volume of patients, many of whom may have less virulent forms of prostate cancer, is creating a challenge for physicians determined to provide patients with the most appropriate advice - which may not always include aggressive treatment.
"Thanks to funding from the Prostate Cancer Foundation and others like the National Cancer Institute, we're getting closer every day to developing the best protocols for thousands of men with this diagnosis," said Stampfer. Our goal is that any man with low risk prostate cancer can make simple changes that will extend his life and that healthy men can avoid it altogether."
GYMR
Prostate Cancer Current Events and Prostate Cancer News RSSCarnegie Mellon researchers link health-care debate to risk of dying in US and Europe
The current health care debate in the United States is complicated. Trade-offs between heath care expenditures, lifestyle choices and life expectancy have been suggested but seldom clearly demonstrated.
New finding suggests prostate biopsy is not always necessary
Researchers at Wake Forest University School of Medicine and the University of Wisconsin-Madison have discovered that some elevated prostate-specific antigen (PSA) levels in men may be caused by a hormone normally occurring in the body, and are not necessarily a predictor of the need for a prostate biopsy.
Does prostate-specific antigen velocity help in early detection prostate cancer?
The November issue of European Urology, the official journal of the European Association of Urology, features an article focussing on prostate specific antigen (PSA) velocity and early cancer detection. It has been suggested that changes in PSA over time aid prostate cancer detection.
New Synthetic Molecules Trigger Immune Response to HIV and Prostate Cancer
Researchers at Yale University have developed synthetic molecules capable of enhancing the body's immune response to HIV and HIV-infected cells, as well as to prostate cancer cells. Their findings, published online in the Journal of the American Chemical Society, could lead to novel therapeutic approaches for these diseases.
Chemo-radiation before prostate removal may prevent cancer recurrence
Researchers in the Oregon Health & Science University Knight Cancer Institute and the Portland Veterans Affairs Medical Center have found a combination of radiation therapy and chemotherapy given before prostate removal is safe and may have the potential to reduce cancer recurrence and improve patient survival.
Blood vessels might predict prostate cancer behavior
A diagnosis of prostate cancer raises the question for patients and their physicians as to how the tumor will behave. Will it grow quickly and aggressively and require continuous treatment, or slowly, allowing therapy and its risks to be safely delayed?
Short-term hormone therapy and intermediate dose radiation increases survivial for early stage prostate cancer
Short-term hormone therapy given prior to and during intermediate dose radiation treatment for men with early stage prostate cancer increases their chance of living longer, compared to those who receive the same radiation alone.
Task force develops new radiation guidelines for brachytherapy
Radiation dose delivered to the prostate and nearby organs in every brachytherapy procedure should be carefully analyzed using post-implant CT or MRI and uniformly documented in every patient.
1 disease, not 1 demographic
The Asian continent has nearly four billion people living in 47 different countries, and each of these groups has their own unique set of health issues. But when they come to the United States, they're often lumped into one large demographic: "Asian/Pacific Islander."
Cancer survivors may not be getting the help they need to stop smoking
More than a quarter of cancer survivors who still smoke have not been advised to quit smoking by their health care providers in the last year, according to a study published by researchers at Fox Chase Cancer Center in the current issue of the Journal of General Internal Medicine.
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