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:5/26/2017)... ... May 26, 2017 , ... After raising nearly $30,000 ... gadget will continue to be available at a discounted crowdfunding price on Indiegogo ... wherever they are, I also wanted to bring a fidget toy to the market ...
(Date:5/26/2017)... ... ... Silver Birch of Hammond, a new assisted lifestyle community, has welcomed its first ... at 5620 Sohl Avenue in Hammond, serves older adults who need some help to ... apartments. Each of the private apartments at Silver Birch features a kitchenette, spacious bathroom ...
(Date:5/26/2017)... CA (PRWEB) , ... May 26, 2017 , ... Dr. ... is proud to announce a new, informational blog post on insurance options. If a ... checking insurance plans may help save time and money. Visiting an in-network provider for ...
(Date:5/26/2017)... ... May 26, 2017 , ... “THE FLINTHILLS FAMILY-Our Journey to the Cross”: the personal ... to the Cross” is the creation of published authors, Bob and Margaret Massey. Bob ... say, he is "panther quick and leather tough." His love for others is apparent ...
(Date:5/26/2017)... ... , ... “Just What Happened in the Garden of Eden”: retells the stories of three Bible ... creation of published author, Penelope Colt, mother, trader, horse farmer, artist and a former GM ... was three. At six, they moved to Dayton, Ohio, where Penny graduated high school. ...
Breaking Medicine News(10 mins):
(Date:5/4/2017)... Mass. and SAN DIEGO ... Obstetricians and Gynecologists (ACOG) 2017 Annual Clinical and Scientific ... single-use, self-contained, illuminating medical devices, today announced the launch ... of its OfficeSPEC and ER-SPEC ... the addition of extra-small and extra-large sizes makes OBP ...
(Date:5/4/2017)... 4, 2017  A new tight-tolerance microextrusion medical ... highly-engineered materials, is being launched by Natvar, a ... developed in recent years to service a wide ... applications. More expensive materials such as glass and ... due to their ability to consistently hold tolerances. ...
(Date:5/3/2017)... 3, 2017 A Catheterization Laboratory is ... healthcare facility. Commonly referred to as cath lab, ... diagnostic imaging technology to give physicians visual access ... these spaces, a team of physicians perform life-saving ... coronary intervention, congenital heart defect closure, stenotic heart ...
Breaking Medicine Technology: