Navigation Links
Vanderbilt study finds diverse genetic alterations in triple-negative breast cancers
Date:12/7/2012

Most triple-negative breast cancer patients who were treated with chemotherapy to shrink the tumor prior to surgery still had multiple genetic mutations in their tumor cells, according to a study by Vanderbilt-Ingram Cancer Center (VICC) investigators.

Finding multiple mutations instead of just one primary mutation that can be targeted for therapy sheds more light on the challenges of treating triple-negative breast cancer.

The study, led by Justin Balko, Pharm.D., Ph.D., and research faculty in the laboratory of Carlos Arteaga, M.D., director of the Breast Cancer Program at VICC, was presented at the 2012 CTRC-AACR San Antonio Breast Cancer Symposium, held Dec. 4-8.

Approximately 15 percent of breast cancer patients in the U.S. have triple-negative cancer a form of the disease that disproportionately affects young African-American women. Triple-negative breast cancer has traditionally been more difficult to treat than other forms of the disease.

"The standard of care for many patients with triple-negative breast cancer is to administer chemotherapy before surgery to shrink the tumor," Balko said. "Unfortunately, about 70 percent of patients still have some residual disease at the time of surgery, despite treatment."

Balko and colleagues profiled residual tumor tissue from 114 patients with triple-negative breast cancer who had received chemotherapy prior to surgery. Triple-negative breast cancer cells do not have estrogen receptors, progesterone receptors, or large amounts of the HER2/neu protein.

The investigators were able to evaluate DNA from 81 tumors and used deep sequencing to examine 182 oncogenes and tumor suppressors that are known to be altered in human cancers. Instead of finding similar genes affected among the patients, they found a diverse set of genes were altered.

"We already knew that triple-negative breast cancer is driven by a diverse group of genetic alterations," Balko said. "So, in one way, we fell further down this rabbit hole, but we also found some things that could be promising therapeutically, such as frequent MYC, MCL1 and JAK2 amplifications as well as mutations in the PI3K pathway."

The additional genetic alterations found in the study may provide targets for new therapies.

Balko said the next step is to confirm the findings in a larger patient group, and if the findings are replicated, broad molecular approaches will be needed to help develop personalized therapies for triple-negative breast cancer. It also will be necessary to explore the therapeutic sensitivity of breast cancers harboring these lesions in the laboratory to know how to treat patients who have these alterations.


'/>"/>

Contact: Dagny Stuart
dagny.stuart@vanderbilt.edu
615-936-7245
Vanderbilt University Medical Center
Source:Eurekalert

Related medicine news :

1. Vanderbilt study finds obesity linked to kidney injury after heart surgery
2. Vanderbilt researchers find proteins may point way to new prostate cancer drug targets
3. Vanderbilt-led study reveals racial disparities in prostate cancer care
4. Vanderbilt study looks at benefits of progestogens to prevent early childbirth
5. UNC, Vanderbilt discover a new live vaccine approach for SARS and novel coronaviruses
6. Study Suggests Vaccine May Help Kids With Brain Cancer
7. Study reveals how cancer drug causes diabetic-like state
8. Coffee Drinking in Pregnancy Wont Lead to Sleepless Baby: Study
9. Lower GI problems plague many with rheumatoid arthritis, Mayo Clinic study finds
10. Veggies Like Broccoli, Cabbage May Help Fight Breast Cancer: Study
11. No Added Cancer Risk From Hip Replacement Materials: Study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/21/2017)... ... January 21, 2017 , ... In the United States, 20 million women and ... recovery, they often feel shame for having struggled with an eating disorder as well ... workshop, “Rising Strong in Life After an Eating Disorder” -- to be featured at ...
(Date:1/20/2017)... ... 20, 2017 , ... Yisrayl Hawkins, Pastor and Overseer at The House of Yahweh has posted ... world. Yisrayl says this generation is a time like no other and society needs to ... , Yisrayl says he does not want to sound like an old bible beater because ...
(Date:1/20/2017)... ... , ... Lice Troopers, the lice removal company based in South Florida, has ... holiday season. , “It happens every year around this time,” says owner, Arie ... which is the head-to-head gateway that lice need to spread.” , As children return ...
(Date:1/20/2017)... ... ... "TransFlare 4K Mystique comes with 44 colorful mysterious transitions that are fully ... - CEO of Pixel Film Studios. , TransFlare 4K Mystique contains 44 lens ... and light leak transitions have a very high-dynamic range for super smooth falloff. Simply ...
(Date:1/20/2017)... ... January 20, 2017 , ... “Code Word: Chocolate Biscuit”: a biographical account following a man ... is the creation of published author, Marlyn Ivey, born in Lynn Haven, Florida and at ... school and at 19 years of age, he joined the Navy and got married right ...
Breaking Medicine News(10 mins):
(Date:1/20/2017)... , Jan. 20, 2017 Wells Specialty Pharmacy announces ... Howell Branch Rd in Winter Park, Florida ... Park . Operations have been consolidated into the 3796 ... also pleased to announce that Chad Tomlinson , former ... the Company effective immediately. Mr. Tomlinson is a Graduate of ...
(Date:1/19/2017)... , Jan. 19, 2017 Report Details ... Market? Which areas are going to grow at the ... to 2026, assessing data, trends, opportunities and prospects. ... Discover the most lucrative areas in the industry and ... assess forecasted sales across the all the major categories ...
(Date:1/19/2017)... This report on the opioid induced constipation ... the global market. Large number of chronic pain sufferers ... is a major side effect of consumption of opioid ... therapy has been prescribed to treat opioid induced constipation. ... and growing awareness about the therapy are the major ...
Breaking Medicine Technology: