Soy as Prostate Cancer Protection Yields Paradoxical Results

Hi Guys,

For years I have used soy products, most particularly soy milk and tofu, but following my diagnosis of aggressive prostate cancer last May and then the public warnings of the danger associated with taking soy, I stopped taking soy milk and moved over to rice milk and oat milk. The tofu I continue to have because my research tells me that the fermentation process used, destroys the two bad elements within soy (hence, I guess, how it is that the Chinese have been consuming tofu for hundreds of years, perhaps thousands, without any perceived ill effects.)

With that background I found the following article of special interest. It appears that consuming soy in the early stages of prostate cancer may be a good thing but definitely not if it is of the aggressive type. But how would you know? Ask a specialist? Maybe! But ask two or three and you're likely to get a different answer each time. Confused? Yep, and so are they much of the time.

The answer? Take charge of your own health and wellbeing. Do your own research, talk to medical professionals; naturopaths; homeopaths, friends and neighbours. Anyone in fact who can add a smidgen of anecdotal or clinical information that will help YOU make your own, rational judgments and decisions.

I can only hope that I cut out taking soy milk in time and that I didn't, in my earlier ignorance, worsened an already worst case scenario.

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Soy as Prostate Cancer Protection Yields Paradoxical Results

By Neil Osterweil, Senior Associate Editor, MedPage Today
Reviewed by Rubeen K. Israni, M.D., Fellow, Renal-Electrolyte and Hypertension Division, University of Pennsylvania School of Medicine
March 16, 2007


MedPage Today Action Points

Explain to patients who ask that that several studies have suggested that diets rich in soy may protect against some types of prostate cancer.


Explain that this study suggests that in addition to protection there may also be increased risk for advanced prostate cancer from high soy diets, although the reasons are unclear.

Review
TOKYO, March 16 -- Diets rich in soy protect against prostate cancer. Then again, they don't.

This paradoxical finding came from a study of 43,509 Japanese men. For some soy isoflavones in the diet decreased the risk of localized prostate cancer, but at the same time soy containing miso soup increased the risk of advanced prostate cancer.


So reported Norie Kurahashi, M.D., of the National Cancer Center of Japan, and colleagues, in the March issue of Cancer Epidemiology, Biomarkers & Prevention.


"The present findings provide no clear understanding of when or how localized cancer will develop to aggressive cancer, and of the related effect of isoflavones," said Dr. Kurahashi.


The investigators recommended that Japanese men continue their high consumption of soy from foods, but they discouraged the use of supplements.


The investigators hypothesized that soy in general, and its isoflavones genistein and daizden in particular, may attenuate but not prevent the progression of latent prostate cancer. Soy isoflavones are estrogen mimics and strong antioxidants in vitro, and appear to be protective against cancer in animal models.


The Japanese study, the largest of its kind, prospectively evaluated the relationship between soy consumption and prostate cancer in men who were part of an even larger cohort study.


The men, ages 45 to 74 years, responded to a validated questionnaire which included 147 food and beverage items, including questions about portion size and frequency of consumption.


The authors focused on the consumption of miso, a soy-based soup, and at tofu in various forms, as well as natto, or fermented soybean, and soy milk. They also looked at the consumption of the isoflavones, which they estimated based on food composition tables listing isoflavone content of Japanese foods.


The study used as its baseline the five-year follow-up interval from the Japan Public Health Center-Based Prospective Study. Beginning in 1995 and continuing through 2004, there were 307 new cases of prostate cancer: 74 advanced, 220 organ-localized, and 13 of indeterminate stage.


The authors found that intake of genistein, daidzein, miso or soy foods did not have a significant effect on the risk of developing total prostate cancer (localized and advanced) for the entire cohort.


But when they broke the data down according to cancer by stage and age they found that men older than 60 in the highest quartile of intake of three of the four items -- genistein, daidzein, and soy foods -- had significantly decreased risk for localized prostate cancer versus those in the lowest quartile.


Of the men older than 60 with localized cancer, genistein was associated with a relative risk for cancer of 0.52 (95% CI, 0.30-0.90, P for trend = 0.03) in 25,538 person-years of follow-up.


Similarly, highest consumption of daidzein was associated with a relative risk of 0.50 (95% CI, 0.28-0.88, P for trend = 0.04) in 25,276 person-years, and soy foods were associated a relative risk of 0.52 (95% CI, 0.29-0.90, P for trend = 0.01).


There were no significant differences between the highest and lowest quartiles for any of the four items among men younger than 60, however.


When the investigators looked at advanced cancer among men older than 60 in a multivariate analysis adjusted for energy intake, there was a dose-dependent increase in risk for advanced prostate cancer associated with miso soup. There was a multivariable relative risk for the highest versus lowest quartile of 2.79 (95% CI, 1.19-6.55; P for trend = 0.02). Consumption of soy foods or the isoflavones was not associated with advanced prostate cancer in multivariate analysis, however.


"In the present study, we observed a dose-dependent decrease in the risk of localized prostate cancer with isoflavone consumption," the investigators wrote. "Men with the highest intake of isoflavones (as genistein, > 32.8 mg/d) had a decreased risk of prostate cancer compared with those with the lowest intake of isoflavones (as genistein, <13.2mg/d).>

Vitamins ! Are They Good For You?

Hi Guys,

I dare say many of you will have read much of the misinformed nonsense written in recent print media world-wide about the potential harm of vitamins but not much has been written in reply, giving the counter arguments and disputing the interpretations of the studies, or questioning the sponsorship of such studies.

In a earlier post I mentioned that last year the Chief Coroner in New Zealand had queried similar negative reports about the dangers of vitamins to human health and had been inspired to conduct a review of all recorded deaths, nation-wide. As I recall from media reports, he could not find any incidence of vitamins, or other such supplements, being the cause, or a major contributor, of a death.

Another cause of some concern is bleating from the medical profession contesting the benefits of supplements which they say are untried and untested. (Ignoring the past hundred years or so and in the case of some, herbs especially, thousands of years).

The medical profession talk of the well tested, credible, and strictly regulated drugs and pharmaceuticals used by doctors’ but that dubious claim appears to have been refuted in a recent Brisbane Courier report, wherein professor Kelman from the National Centre for Epidemiology and Population Health, is quoted as saying “The current system for evaluating drug safety is outdated”.

It seems that currently, new medicines are judged solely on pre-marketing trials and on doctors’ adverse finding reports. Experts have warned that all new drugs should carry warning labels as part of an overhaul of Australia’s “archaic” monitoring system for new medications.

Professor Kelman is quoted as saying Australia has fallen behind the rest of the world in this matter, and that “Trials usually last no more than 12 months, so do not evaluate the increasingly common long-term use of medicines by patients with chronic disorders.”

Gents, we must counter the pharmaceutically-biased, misinformed, misinterpreted and often, drug company sponsored, studies condemning vitamins and let the truth be know. We can best do this by being well informed ourselves, fully armed with apposing argument. I have recently found a brilliant web site that most ably presents the total picture and which appears to have all the ammunition we need. CLICK on the link below…

For a wealth of information on this issue, go to:

http://www.doctoryourself.com/safety.html

See also: http://www.orthomolecular.org/resources/omns/index.shtml

Prostate Cancer and Other Forms of Cancer

Hi Guys,
Here's food for thought. No doubt some readers will be investigating prostate cancer following recent diagnosis. In which case a little background info on cancer in general won't go astray.

Understanding cancer means knowing it’s more than one disease

Although there are many kinds of cancer, they all start because of out-of-control growth of abnormal cells. Normal body cells grow, divide and die in an orderly fashion. Because cancer cells continue to grow and divide, they are different from normal cells. Instead of dying, they outlive normal cells and continue to form new abnormal cells.

Cancer cells develop because of damage to DNA, which directs all activities in each cell. When DNA becomes damaged, the body is usually able to repair it. In cancer cells, however, the damaged DNA is not repaired. People can inherit damaged DNA, which accounts for the approximately 10 percent of inherited cancers. More often, though, a person’s DNA becomes damaged by exposure to something in the environment or random cellular events.

Most cancers originate almost anywhere in the body and usually form as a solid tumor, while others, such as leukemia and myeloma, are sometimes referred to as liquid tumors (see illustration). These cancer cells involve the blood and blood-forming organs (bone marrow) and circulate through other tissues, where they grow.

The different types of cancer include:

Carcinomas: The most common type of cancer, these tumors arise from the cells that cover external and internal body surfaces. The most frequent cancers of this type in the United States are lung, breast and colon cancer.

Sarcomas: Cancers that arise from cells found in the supporting tissues of the body, such as bone, cartilage, fat, connective tissue and muscle.

Lymphomas: Cancers that arise in the lymph nodes and tissues of the body’s immune system.

Leukemias: Cancers of the immature blood cells that grow in the bone marrow and tend to accumulate in large numbers in the bloodstream.

The place where a cancer starts is called the primary site. From there, it can spread (metastasize) to other parts of the body. Regardless of where a cancer may spread, it is always named for the place it began. For instance, breast cancer that spreads to the liver is still called breast cancer, not liver cancer.

Different types of cancer can behave very differently. For example, lung cancer and breast cancer are very different diseases. They grow at different rates and respond to different treatments. That is why people with cancer need treatment that is aimed at their particular kind of cancer.

Not all tumors are malignant (cancerous). Benign, or noncancerous, tumors do not spread to other parts of the body and, with very rare exceptions, are not life-threatening.

During the second half of the 20th century, scientists uncovered many of the intricacies of cancer and developed the technology to pinpoint the exact site of the damage to a specific gene, which has had a tremendous impact on the types of therapies now available.

Adapted from an article from the American Cancer Society
http://www.cancer.org/docroot/home/index.asp

Metastases to the Bone

Hi Guys,

I thought you’d be interested in this article because, as you probably know, when prostate cancer spreads its invariably goes to the bones. When my aggressive prostate cancer was diagnosed last May I was told markers indicated a high probability of the cancer having started on its journey to my bones, although follow up tests at the time were inconclusive. Ten months later I have not considered further tests because knowing would not achieve anything at this juncture. I’m hell bent on maintaining my alternative medicine regimen and all the signs to date are very positive health wise and as for my quality of life, it is truly great.

I hope that you find this item informative…

Metastases to the Bone
Disease Site of Metastases to the Bone:

Metastases is the term used to describe the spread of cancer from its site of origin to another location in the body. Bone is one of the most common locations in the body to which cancer metastasises. Any type of cancer can spread to the bone.The most common metastasising cancers are those of the breast, lung, kidney, thyroid and prostate.

Incidence of Metastases to the Bone:

Bone metastases are common, however, its true incidence is unknown, as it is dependent on the prevalence of certain types of cancers in the community which predispose to bone metastases.

Predisposing Factors of Metastases to the Bone:

Bone metastases are found more commonly in middle-aged to elderly people; they are uncommon in children. The major cancer types which tend to metastasize to bone include multiple myeloma, breast, prostate, lung, kidney, and thyroid cancers. However, a number of factors are involved - the probability of bone metastasis can be assessed only by knowing the prevalence of the cancer and its preference for bone in a particular ethnic group.

Natural History of Metastases to the Bone:

Bone metastases results in injury to bone tissue. There are two types of bone lesions: lytic lesions, which destroy bone material, and blastic lesions, which fill up bone with extra cells. Normal bone is in a constant state of remodelling - being broken down and rebuilt. Cancer cells that have spread to the bone disrupt this balance between the activity of cells that break down bone (osteoclasts) and cells that make bone (osteoblasts).

Bone metastases may be found anywhere in the skeleton, but generally occur in the central parts. More than 90% of all metastases are found in the back, pelvis, upper leg, ribs, upper arm, and skull. Complications of bone metastases include pain, increased risk of fracture, raised calcium levels in the blood, and a decreased blood cell count.

Prognosis of Metastases to the Bone:

Once cancer has spread to the bone, prognosis tends to be poor and treatment is generally aimed at minimising symptoms and improving quality of life. Bone metastases often have a significant impact on a patient’s quality of life by causing reduced mobility and pain, and complications such as high calcium levels, bone marrow suppression and fractures.

Investigation of Metastases to the Bone:

Tests which may be done if bone metastases are suspected include:
# Blood tests.
# ECG (if the patient has an irregular heartbeat).
# X-rays.
# Whole body bone scan looking for metastases.
# CT scan / MRI scan to assess local disease.

Treatment Overview of Metastases to the Bone:

The goal of treatment for bone metastases is to relieve pain and reduce the risk of fracture. Treatment may consist of surgery, radiation therapy, pain medications, and/or bisphosphonate drugs.
# Surgery may be required if there is immediate risk of fracture. Metal rods, plates, screws, wires, nails, or pins can be inserted to stabilise the bone at risk.
# Radiation Therapy: For metastatic lesions without immediate risk of fracture, radiation is effective for reducing localised bone pain and progression of the cancer.
# Medications: A groups of drugs called ‘bisphosphonates’ have been shown to reduce the risk of fractures caused by metastatic bone lesions, as well as treating bone pain and controlling raised calcium levels. Painkillers may be required if bone pain is interfering with the patient’s quality of life.

Drugs used in the treatment of this disease:

Supportive care drugs

* Zoledronic acid
(Zometa)

Other

* Sodium clodronate
(Bonefos)

For further information, please go to the VirtualCancerCentre.com site from whence this came:
http://www.virtualcancercentre.com/diseases.asp?did=708