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Meat's risk for cancer: just bologna? ... not when it's prostate cancer.



Many epidemiological studies have implicated im·pli·cate  
tr.v. im·pli·cat·ed, im·pli·cat·ing, im·pli·cates
1. To involve or connect intimately or incriminatingly: evidence that implicates others in the plot.

2.
 red meat or animal fat as a risk factor in colon cancer colon cancer, cancer of any part of the colon (often called the large intestine). Colon cancer is the second most common cancer diagnosed in the United States.  -- though not unequivocally. While a new Dutch study does not exonerate red meats, it does suggest that the accusatory finger should be pointed at processed meats, "mainly sausages."

R. Alexandra Goldbohm of the TNO-Toxicology and Nutrition Institute in Zeist, the Netherlands, and her colleagues mailed a detailed questionnaire on diet and other cancer risk factors to 120,852 Dutch men and women. After following these individuals -- age 55 to 69 -- for 3.3 years, the Years, The

the seven decades of Eleanor Pargiter’s life. [Br. Lit.: Benét, 1109]

See : Time
 researchers then compared the recorded diet and other habits of the 312 individuals who developed colon cancer with those of 3,500 other members of the initial group.

In the Feb. 1 CANCER RESEARCH, Goldbohm's team reports finding no link between colon cancer and consumption of freshly cooked meats, animal fat, or animal protein. However, they did observe that eating processed meat appears "consistently and positively related to risk." Compared to adults who ate none, those who consumed more than 20 grams daily were 72 percent more likely to develop colon cancer.

... not when it's prostate cancer prostate cancer, cancer originating in the prostate gland. Prostate cancer is the leading malignancy in men in the United States and is second only to lung cancer as a cause of cancer death in men.  

A new study of 14,916 male physicians links eating red meat to prostate cancer. Data from the 120 prostate malignancies that developed in study participants during the first 6 years indicate that men eating red meat five or more times a week face 2.5 times the risk of developing this cancer as men who consumed red meat once a week or less. Researchers at Harvard Medical School Harvard Medical School (HMS) is one of the graduate schools of Harvard University. It is a prestigious American medical school located in the Longwood Medical Area of the Mission Hill neighborhood of Boston, Massachusetts.  in Boston report their finding in the Feb. 16 JOURNAL OF THE NATIONAL CANCER INSTITUTE.

Last October, some of the same authors reported on a similar large, long-term study. Its dietary-recall data linked meat and animal fat with fostering the spread of prostate cancer -- but not with initiating the disease (SN: 10/9/93, p.228). The new study, based on blood samples taken prior to a diagnosis of cancer, does appear to link diet to cancer development. However, notes study leader Peter H. Gann, now at Northwestern Medical School in Chicago, there were more invasive cancers in the newer study. So its findings "are very consistent" with the other group's.

Like that earlier Harvard study, the new one also observed up to a tripling of colon cancer risk among men whose blood contained the most alpha-linolenic acid Noun 1. alpha-linolenic acid - a polyunsaturated fatty acid with 18 carbon atoms; the only omega-3 fatty acid found in vegetable products; it is most abundant in canola oil; a fatty acid essential for nutrition  (a polyunsaturated fat obtained from meats, dairy foods, and some vegetable oils) compared to men whose blood bore undetectable levels of the fatty acid fatty acid, any of the organic carboxylic acids present in fats and oils as esters of glycerol. Molecular weights of fatty acids vary over a wide range. The carbon skeleton of any fatty acid is unbranched. Some fatty acids are saturated, i.e. . Moreover, in both studies, aipha-linolenic's effect proved independent of red meat's risk.

A related editorial in the same journal says "compelling reasons" exist to suspect that male sex hormones, such as testosterone, "are also intimately involved in prostate cancer." Because high-fat, low-fiber diets may boost circulating levels of such hormones -- even in pregnant women -- a man's eventual predisposition to prostate cancer may begin in utero in utero (in u´ter-o) [L.] within the uterus.

in u·ter·o
adj.
In the uterus.



in utero adv.
, argue Ronaid K. Ross of the Norris Comprehensive Cancer Center at the University of Southern California The U.S. News & World Report ranked USC 27th among all universities in the United States in its 2008 ranking of "America's Best Colleges", also designating it as one of the "most selective universities" for admitting 8,634 of the almost 34,000 who applied for freshman admission  and his coauthor.
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No portion of this article can be reproduced without the express written permission from the copyright holder.
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Title Annotation:processed meat linked to colon cancer; red meat linked to prostate cancer
Publication:Science News
Article Type:Brief Article
Date:Feb 19, 1994
Words:504
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