Featured Research

from universities, journals, and other organizations

Unlocking the genetic and molecular mystery of soft-tissue sarcoma

Date:
November 30, 2011
Source:
Joslin Diabetes Center
Summary:
Scientists have uncovered important molecular and genetic keys to the development of soft-tissue sarcomas in skeletal muscle, giving researchers and clinicians additional targets to stop the growth of these often deadly tumors.

Scientists at Joslin Diabetes Center in Boston have uncovered important molecular and genetic keys to the development of soft-tissue sarcomas in skeletal muscle, giving researchers and clinicians additional targets to stop the growth of these often deadly tumors.

Published in the Proceedings of the National Academy of Sciences, the study identified two major molecular signaling pathways (the Ras and mTOR pathways) that are common in tumor growth and development. These molecular pathways regulate cell growth and division, two cellular properties whose over-activation are hallmarks of cancer biology.

"In humans, some sarcomas respond to chemotherapy, says lead author Amy J. Wagers, PhD, an associate professor of stem cell and regenerative biology at Harvard Medical School and Joslin Diabetes Center, "but many don't. With these findings, we have vetted a list of new candidate targets whose inhibition may lead to regression of these tumors."

Many soft-tissue sarcomas, which develop in certain tissues such as bone and muscle, carry specific genetic mutations or unique gene signatures, which can allow scientists to develop more precise, targeted therapies. Wagers and her colleagues engineered a tumor system in mice by introducing into mouse skeletal muscle a cancer-carrying gene, or oncogene, known to cause tumors in humans. They used this engineered system to identify a small set of genes that are active in sarcoma tumors.

There are many different types of soft-tissue sarcomas, which develop in tissues that connect, support or surround other structures and organs, including muscle, tendons, nerves, fat and blood vessels. If diagnosed early, treatment, primarily through surgical removal of the tumor, radiation therapy or chemotherapy, can be effective. If the tumor has spread, however, the tumor can be controlled only for a period of time, but treatment does not often cure the disease.

By inducing these tumors in mice, Wagers says the scientists knew when the tumors would form in the mice and where in the body they would develop, which helped them better understand the molecular and genetic pathways underlying the disease. With this knowledge, researchers may be able to develop new intervention strategies that interfere with these genetic activities and stop the growth of this type of tumor.

"With the engineered system we developed, we can find new fragile points in the tumor to target," says first author Simone Hettmer, MD, a pediatric oncologist at the Dana-Farber/Children's Hospital Cancer Center, who treats children with these tumors. In addition, she adds, the system allows scientists to look at the genetic changes in sarcomas and how they interact with the development of tumors and can be applied to sarcomas in tissues other than skeletal muscle.

Surprisingly, says Wagers, the researchers found they could induce tumors using several different 'beginning' cells. The scientists generated tumor cells using stem cell-like cells that go on to make either muscle or other connective tissues. Tumors that develop from muscle cells were rhabdomyosarcomas, the most common form of soft-tissue sarcoma seen in children, while tumors that developed from non-muscle cells represented other types of sarcoma.

Wagers and her colleagues are now working on establishing a similar engineered model using human cells to test the effectiveness of anti-sarcoma medications. These preclinical experiments are designed to identify the most promising candidates for the treatment of soft-tissue sarcoma that ultimately will be pursued in human clinical trials. Early studies have identified several chemical compounds that, in cell cultures at least, appear to slow the growth of sarcoma cells.

In addition to Wagers and Hettmer, other Joslin co-authors of the study were Jianing Liu, Christine Miller, and Melissa Lindsay, as well as Cynthia Sparks and David Guertin of the University of Massachusetts Medical School, Roderick Bronson of the Tufts University School of Veterinary Medicine, and David Langenau of Massachusetts General Hospital.


Story Source:

The above story is based on materials provided by Joslin Diabetes Center. Note: Materials may be edited for content and length.


Cite This Page:

Joslin Diabetes Center. "Unlocking the genetic and molecular mystery of soft-tissue sarcoma." ScienceDaily. ScienceDaily, 30 November 2011. <www.sciencedaily.com/releases/2011/11/111130120134.htm>.
Joslin Diabetes Center. (2011, November 30). Unlocking the genetic and molecular mystery of soft-tissue sarcoma. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/11/111130120134.htm
Joslin Diabetes Center. "Unlocking the genetic and molecular mystery of soft-tissue sarcoma." ScienceDaily. www.sciencedaily.com/releases/2011/11/111130120134.htm (accessed July 31, 2014).

Share This




More Health & Medicine News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Peace Corps Pulls Workers From W. Africa Over Ebola Fears

Peace Corps Pulls Workers From W. Africa Over Ebola Fears

Newsy (July 30, 2014) The Peace Corps is one of several U.S.-based organizations to pull workers out of West Africa because of the Ebola outbreak. Video provided by Newsy
Powered by NewsLook.com
Weather Kills 2K A Year, But Storms Aren't The Main Offender

Weather Kills 2K A Year, But Storms Aren't The Main Offender

Newsy (July 30, 2014) Health officials say 2,000 deaths occur each year in the U.S. due to weather, but it's excessive heat and cold that claim the most lives. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins