Featured Research

from universities, journals, and other organizations

Cancer Biologists Identify Major Player In Cell Growth

Date:
February 7, 2007
Source:
Brown University
Summary:
The transcription factor GABP -- a member of a family of crucial gene-regulating proteins -- is required to jump-start the process of cell division, according to research from The Warren Alpert Medical School of Brown University and Rhode Island Hospital. The work, published in Nature Cell Biology, uncovers a new way to control cell growth and points up potential targets for cancer treatments.

When cells go about the business of dividing, they can get sidelined. Maybe there aren’t enough nutrients. Maybe there aren’t the right signals to resume multiplying. Either way, cells go quiet.

Related Articles


What can restart cell division – the process that drives the development of embryos, the renewal of hair, skin and blood, and the creation of cancer – is a single transcription factor called GABP, according to new research from The Warren Alpert Medical School of Brown University and Rhode Island Hospital.

The work, published online in Nature Cell Biology, introduces a new pathway that can be manipulated to control cell growth. Since cell growth is a fundamental biological process, the research may shed light on everything from miscarriages to muscular dystrophy. The main application, however, is cancer. Since a key characteristic of cancer cells is unchecked growth, the research identifies potential targets for new treatments.

“As a scientist and a physician, I am tremendously excited,” said Alan Rosmarin, M.D., an associate professor in the Department of Medicine and the Department of Molecular Biology, Cell Biology and Biochemistry at Brown and director of clinical oncology research for Lifespan, Rhode Island’s largest health care system. “This discovery not only adds to our basic understanding of cell division, it could lead to better cancer drugs. And they’re needed. Cancer touches everyone.”

During the cell cycle, the four-phase process of cell division, there is a period when the biochemical brakes are put on and cells become inactive. Then the process is kick-started and cells move into the so-called S phase, when DNA is duplicated. This is a critical juncture. If genes are missing or broken, these alterations are passed on to the new cell – and could result in disability or in diseases such as cancer.

So biologists are keenly interested in identifying the accelerators that rev-up cell division. Ets transcription factors, a family of gene-regulating proteins that are major players in embryonic and cancer development, seemed obvious culprits. Rosmarin, a hematologist-oncologist, studies one member of the Ets family called GABP. This transcription factor helps make a variety of cells, including white blood cells. If those cells develop abnormally, leukemia results.

But the exact function of GABP in the cell cycle wasn’t known. Rosmarin wanted to find out. So he and members of his laboratory created mice that carried a mutation – tiny DNA sequences were inserted into their GABP-making gene. These DNA bits would serve as a time bomb of sorts, deleting a critical piece of the gene when given a chemical signal.

From these mice, Rosmarin and his team grew fibroblasts – common connective tissue cells – in a Petri dish with nutrient-rich serum and watched them grow. When they detonated their time bomb, GABP was disrupted, and the fibroblasts’ ability to divide was dramatically reduced. At the same time, other genes known to restart cell division were unchanged.

The team confirmed GABP’s critical role in cell growth another way. Simply forcing dormant cells to make GABP, they found, was enough to rouse cells from their slumber and get them to grow again.

“So we’ve found a new pathway to control cell growth,” Rosmarin said. “Now that we know a way to disrupt GABP and stop division, there is the possibility that a drug can be made to do the same thing in cancer cells.”

Zhong-Fa Yang, an instructor in medicine at Brown and a postdoctoral research fellow at Rhode Island Hospital, was the lead author of the journal article. Stephanie Mott, a Rhode Island Hospital research associate, assisted with the experiments.

The National Heart, Lung and Blood Institute, the National Center for Research Resources and the Herbert W. Saint ’49 Fund at Brown University funded the work.


Story Source:

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


Cite This Page:

Brown University. "Cancer Biologists Identify Major Player In Cell Growth." ScienceDaily. ScienceDaily, 7 February 2007. <www.sciencedaily.com/releases/2007/02/070207091018.htm>.
Brown University. (2007, February 7). Cancer Biologists Identify Major Player In Cell Growth. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2007/02/070207091018.htm
Brown University. "Cancer Biologists Identify Major Player In Cell Growth." ScienceDaily. www.sciencedaily.com/releases/2007/02/070207091018.htm (accessed October 25, 2014).

Share This



More Health & Medicine News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Texas Nurse Nina Pham Cured of Ebola

Texas Nurse Nina Pham Cured of Ebola

AFP (Oct. 25, 2014) — An American nurse who contracted Ebola while caring for a Liberian patient in Texas has been declared free of the virus and will leave the hospital. Duration: 01:01 Video provided by AFP
Powered by NewsLook.com
IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) — IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) — A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com
WHO: Millions of Ebola Vaccine Doses by 2015

WHO: Millions of Ebola Vaccine Doses by 2015

AP (Oct. 24, 2014) — The World Health Organization said on Friday that millions of doses of two experimental Ebola vaccines could be ready for use in 2015 and five more experimental vaccines would start being tested in March. (Oct. 24) Video provided by AP
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:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

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