'Good' Cholesterol May Cut Colon Cancer Risk

[Guest guest]

High levels of " good " cholesterol may reduce the risk of colon cancer, a new

study suggests.

If other studies confirm this finding, people with low levels of

high-density lipoprotein (HDL) cholesterol should " be advised to change

their lifestyle to reduce their risk of colon cancer, " said lead researcher

Dr. Bas Bueno-de-Mesquita, from the department of gastroenterology and

hepatology at the National Institute for Public Health and the Environment

in Bilthoven, the Netherlands.

Cutting " bad " (LDL) cholesterol and increasing " good " (HDL) cholesterol

already are known to reduce the risk for heart disease, and this new study

provides another reason to pay attention to your blood cholesterol numbers.

For the study, published online March 7 in *Gut*, the researchers compared

1,238 people with colorectal cancer to 1,238 healthy people. Of those with

cancer, 779 had colon cancer and 459 had rectal cancer.

The researchers reviewed the results of blood samples and dietary-lifestyle

questionnaires provided by participants enrolled in the European Prospective

Investigation into Cancer and Nutrition study, a long-term look at the

effect of diet on cancer in 10 countries.

The investigators found that those with the highest levels of HDL

cholesterol and another blood fat called apolipoprotein A (apoA) had the

least chance of developing colon cancer, but no impact was seen on rectal

cancer.

" This association is independent of some other markers in the blood that are

related to the development of cancer, " Bueno-de-Mesquita said. Those markers

include inflammation, insulin resistance and oxygen free radicals.

For each 16.6 milligrams per deciliter (mg/dL) increase in HDL and 32 mg/dL

increase in apoA, the risk of colon cancer was cut by 22 percent and 18

percent, respectively, Bueno-de-Mesquita's team found.

But for a subset of patients followed for more than two years, only high HDL

levels were linked with a lower risk of colon cancer.

The researchers speculate that HDL's anti-inflammatory properties may

explain the finding, but say further research is needed to tease out the

specific cause. They also acknowledged that the short follow-up period --

just 3.8 years -- is a limitation to their study.

Depending on the results of such investigations, HDL levels may someday be a

useful tool in moderating a patient's colon cancer risk, the authors stated.

" Currently, the best recommendation to reduce one's risk [of colon cancer]

is to stop smoking, increase physical activity, reduce obesity and abdominal

fatness and limit intakes of alcohol and red and processed meats, "

Bueno-de-Mesquita said.

Commenting on the study, s, strategic director of

pharmacoepidemiology at the American Cancer Society, said that " this

important study is well designed and the largest ever study of HDL

cholesterol and colon cancer risk. "

But, he noted, " the link between HDL and colon cancer needs to be confirmed

in other studies and could reflect the effect of biological factors

correlated with HDL, rather than an effect of HDL itself. "

In addition, s stated, " No matter what the exact biology, we do know

that getting more exercise is a good way to both improve HDL levels and

lower risk of several cancers, including colon cancer. "

LINK <http://consumer.healthday.com/Article.asp?AID=650630>

--

Ortiz, MS, RD

*The FRUGAL Dietitian* <http://www.thefrugaldietitian.com>

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