Navigation Links
Hormone therapy offers potential protective effect against colon cancer in older women
Date:4/22/2009

DENVER In a large study, a national team of researchers led by Mayo Clinic scientists observed that self-reported use of hormone therapy was associated with a significantly lower colorectal cancer risk. However, the mechanisms for the apparent protective association are still unclear.

The study, being presented at the AACR 100th Annual Meeting 2009, was designed to look at possible links between estrogen exposure and colon cancer molecular subtypes, to determine how these hormones might function as anti-cancer agents.

"In our large, prospective study, use of hormone therapy seemed to be beneficial with respect to reducing colorectal cancer risk women who did use these drugs had a 28 percent lower incidence rate than women who did not use these drugs," says the study's lead author, David Limsui, M.D., a fellow in the Department of Gastroenterology at Mayo Clinic's campus in Rochester, Minn. "But we still don't know how estrogen compounds work in cancer prevention, which is intriguing."

Women who reported using other hormone preparations, such as oral contraceptives, did not appear to derive any colorectal cancer prevention benefits. "Based on our findings, we need to continue exploring the cancer pathways that might be affected by these hormones," Dr. Limsui says.

He adds that other studies have also found that hormone therapy protects postmenopausal women against colon cancer. The largest randomized clinical trial was the 16,000-participant Women's Health Initiative, which concluded in 2004 that combination hormone therapy (estrogen and progestin) reduced a woman's risk of colorectal cancer by about 40 percent, he says. "But few studies have delved deeper to see how these hormones work at the molecular level," Dr. Limsui says.

This investigation is part of the Iowa Women's Health Study, which enrolled 41,836 women from Iowa, aged 55-69, in 1986. After exclusions, the study group consisted of 37,285 women. In the current study, the investigators examined tumor tissue from 553 colorectal cancer patients, specifically looking for associations between self-reported hormone use and a specific DNA methylation pattern, called the CpG island methylator phenotype, or BRAF gene mutations. No associations were detected between hormone use and these molecular markers. Of note, the investigative team previously reported that certain environmental exposures, such as cigarette smoking, might increase colorectal cancer risk through DNA methylation pathways.


'/>"/>

Contact: Karl Oestreich
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

Related medicine news :

1. Female hormone cycle affects knee joints
2. IROs Help Determine Medical Necessity of Growth Hormone Therapy
3. A potential new target for treatment of hormone refractory prostate cancer
4. Male Hormone Treatment Provider Announces Family Doctor Alert
5. Autism linked with stress hormone levels
6. Organic Left Standing as the Gold Standard for Consumers Looking to Avoid Food Produced With Synthetic Growth Hormones
7. Hormone Reduces Mortality in Heart Patients With High BP
8. Diplomat Specialty Pharmacy Expands National Growth Hormone Patient Care Program - Hires Denise Piro, RN, BSN
9. Hormone Might Help Restore Female Fertility
10. March 2009 Mayo Clinic Womens HealthSource Highlights Molecular Breast Imaging, Canes and Walkers, Training for an Event and Hormone Therapy for Women
11. Male Hormone Replacement Company Renewman.com Critical of MLB for Testosterone Abuse Publicity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/6/2016)... ... May 06, 2016 , ... Online HR/benefits platforms offer a ... the game for traditional brokers and health plans. “ The Rapid Emergence of Online ... from Atlantic Information Services, Inc. (AIS), will offer an accurate picture of online benefits ...
(Date:5/6/2016)... ... ... From the Speaker Podium to the Exhibit Floor at Booth#514, Worldwide Leading Contact Center ... at SpeechTek 2016 Event, taking place May 23-25 at the Omni Shoreham in Washington ... “5 Customer Engagement Strategies to improve Customer Satisfaction in your Contact Center” on May ...
(Date:5/6/2016)... NY (PRWEB) , ... May 06, 2016 , ... The ... & Resort on the north end of the island close to the town famous ... 17th- August 10th 2016. , “We continue to have an amazing experience in ...
(Date:5/6/2016)... ... May 06, 2016 , ... Multiple award winning plumbing company ... over 35 years. Maintaining core values of exceptional customer service, quality work at reasonable ... a leading name in San Diego plumbing, and other services including heating & air ...
(Date:5/6/2016)... ... 2016 , ... Few events in healthcare changed the landscape ... cost despite its potential to wipe out a silent killer, hepatitis C virus. ... called direct-acting antivirals (DAAs)—have created fallout in the courts and state governments. Advocates ...
Breaking Medicine News(10 mins):
(Date:5/4/2016)... Research and Markets has ... Ischemic Stroke Market and Competitive Landscape Highlights ...      (Logo: http://photos.prnewswire.com/prnh/20160330/349511LOGO ) ... Market and Competitive Landscape Highlights 2016, provides ... products, Acute Ischemic Stroke epidemiology, Acute Ischemic ...
(Date:5/4/2016)... , May 4, 2016 ... addition of the  "Global Actinic Keratosis Market ... to their offering.       (Logo: ... Keratosis Market and Competitive Landscape Highlights 2016, ... products, Actinic Keratosis epidemiology, Actinic Keratosis market ...
(Date:5/3/2016)... PUNE, India , May 4, 2016 /PRNewswire/ ... report spreads across 154 pages, profiling 09 key ... It is a professional and in-depth study on ... providing a basic overview of the industry including ... Insulin Needles market analysis is provided for the ...
Breaking Medicine Technology: