Navigation Links
Gene mutation identifies colorectal cancer patients who live longer with aspirin therapy
Date:10/25/2012

BOSTONAspirin therapy can extend the life of colorectal cancer patients whose tumors carry a mutation in a key gene, but has no effect on patients who lack the mutation, Dana-Farber Cancer Institute scientists report in the Oct. 25 issue of the New England Journal of Medicine.

In a study involving more than 900 patients with colorectal cancer, the researchers found that, for patients whose tumors harbored a mutation in the gene PIK3CA, aspirin use produced a sharp jump in survival: five years after diagnosis, 97 percent of those taking aspirin were still alive, compared to 74 percent of those not using aspirin. By contrast, aspirin had no impact on five-year survival rates among patients without a PIK3CA mutation.

"Our results suggest that aspirin can be particularly effective in prolonging survival among patients whose colorectal cancer tests positive for a mutation in PIK3CA," said the study's senior author, Shuji Ogino, MD, PhD, of Dana-Farber, Brigham and Women's Hospital, and the Harvard School of Public Health. "For the first time, we have a genetic marker that can help doctors determine which colorectal cancers are likely to respond to a particular therapy." He cautions that the results need to be replicated by other researchers before they can be considered definitive.

While aspirin is often prescribed for colorectal cancer patients, doctors haven't been able to predict which patients will actually benefit from the treatment. The new finding suggests that the survival benefit is limited to the 20 percent whose tumors have the PIK3CA mutation.

For the remaining patients, aspirin may still be used, but it is likely to be much less effective and can sometimes lead to gastrointestinal ulcers and stomach bleeding.

The study was prompted by previous research that suggested that aspirin blocks an enzyme called PTGS2 (cyclooxygenase-2), causing a slowdown in the signaling activity of another enzyme, PI3K. That led researchers to hypothesize that aspirin could be especially effective against colorectal cancers in which the PIK3CA gene which provides a subunit of PI3K is mutated.

To conduct the study, investigators obtained data on 964 patients with rectal or colon cancer from the Nurses' Health Study and the Health Professionals Follow-up Study long-term tracking studies of the health of tens of thousands of people. The data included information on the patients' use of aspirin after diagnosis and the presence or absence of PIK3CA mutations in their tumor tissue.

The study, which combines the study of disease-related genes and research into large populations of individuals, represents a new, hybrid field which Ogino has termed molecular pathology epidemiology. "The field may help us bring together information from two frontiers of cancer research at both the molecular and population levels in ways that are beneficial to patients," he said.


'/>"/>

Contact: Anne Doerr
anne_doerr@dfci.harvard.edu
617-632-5665
Dana-Farber Cancer Institute
Source:Eurekalert  

Related medicine news :

1. KRAS gene mutation and amplification status affects sensitivity to antifolate therapy
2. Researchers Find Gene Mutations That May Be a Key to Autism
3. Mayo Clinic breast cancer study finds new type of mutation
4. Scientists make breakthrough in bile duct cancer with discovery of new gene mutations
5. Cancer may require simpler genetic mutations than previously thought
6. Mutations impair childhood growth and development by disrupting organization of chromosome pairs
7. Study sheds new light on role of genetic mutations in colon cancer development
8. Mutations in JAK3 gene identified in subtype of lymphoma provide potential drug target
9. Study finds new gene mutations that lead to enlarged brain size, cancer, autism, epilepsy
10. Gene Mutation Linked to Facial, Skull Abnormalities
11. Mutation in gene IDH a possible target for AML treatment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Gene mutation identifies colorectal cancer patients who live longer with aspirin therapy
(Date:6/26/2016)... ... ... Kasmer, a legally blind and certified personal trainer is helping to develop a weight loss ... plans to fix the two major problems leading the fitness industry today:, ... , They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... Austin, TX (PRWEB) , ... June 25, 2016 , ... ... Fellow of the American College of Mohs Surgery and to Dr. Russell Peckham for ... popular and highly effective treatment for skin cancer. The selective fellowship in Mohs Micrographic ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room , ... Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. , ... our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of First ...
(Date:6/25/2016)... ... 2016 , ... On Friday, June 10, Van Mitchell, Secretary of the Maryland ... iHire in recognition of their exemplary accomplishments in worksite health promotion. , The Wellness ... & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire was one of ...
(Date:6/24/2016)... , ... June 24, 2016 , ... Those who have ... these feelings, many turn to unhealthy avenues, such as drug or alcohol abuse, as ... Michigan, has released tools for healthy coping following a traumatic event. , Trauma sufferers ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... DUBLIN , June 27, 2016 Jazz ... the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act ... proposed acquisition of Celator Pharmaceuticals, Inc. ("Celator"; Nasdaq: ... 11:59 p.m. (Eastern Daylight Time). As previously ... entered into a definitive merger agreement under which Jazz ...
(Date:6/24/2016)... SOUTH SAN FRANCISCO, Calif. , June 24, ... GBT ), a biopharmaceutical company developing novel ... with significant unmet needs, today announced the closing ... 6,400,000 shares of common stock, at the public ... the shares in the offering were offered by ...
(Date:6/24/2016)... BEIJING , June 24, 2016 Dehaier ... or the "Company"), which develops, markets and sells medical ... China , signed a strategic cooperation agreement with ... as "Hongyuan Supply Chain") on June 20, 2016, to ... Under the strategic cooperation agreement, Dehaier will leverage Hongyuan ...
Breaking Medicine Technology: