Navigation Links
Mayo researchers discover mechanism of cell type-specific signaling in tumor development
Date:4/7/2009

ROCHESTER, Minn. Mayo Clinic researchers have discovered the mechanisms behind two key checkpoints in cell growth and development factors that may ultimately allow investigators to benchmark progression of tumor cells or stop them from further development. The findings appear in the current online issue of Developmental Cell.

The team led by Edward Leof, Ph.D., Mayo Clinic biochemist, demonstrated that p21-activated kinase 2 (PAK2), a key target for cancer growth and fibrotic tissue development, is activated in one type of tissue but not another. PAK2 is a downstream component of transforming growth factor beta (TGF-β) signaling in mesenchymal cells those that make up connective tissues in the body, as well as blood and lymphatic vessels. However, TGF-β is unable to activate PAK2 in epithelial cells those that make up external and internal linings, such as skin and the internal lining of many vessels.

"We decided to look at the factors that prevented PAK2 activation in epithelial cells," says Dr. Leof. "We found that a protein called Erbin, in cooperation with the NF2 tumor suppressor Merlin, controls the outcome."

Erbin, the researchers found, controls the tumor suppressor gene Merlin. When Merlin is absent or mutated, the result is schwannoma, a form of tumor involving Schwann cells which make up the myelin sheath that covers nerves. Merlin has also been shown to play a part in causing melanoma, mesothelioma and possibly colorectal cancers.

The researchers showed that in epithelial cells, which have high levels of Erbin, the formation of an Erbin/Merlin complex prevents PAK2 activity following growth factor stimulation. In the absence of Erbin (or Merlin), however, TGF-β stimulates PAK2 activity in some epithelia, overcoming a critical checkpoint in tumor progression.

The findings are important, says Dr. Leof, because they delineate a process by which tumors might be formed and allow future researchers to pinpoint steps where interventions could not just gauge disease progression, but halt tumor growth. There is even the prospect of intervening before a tumor begins to form.


'/>"/>

Contact: Robert Nellis
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

Related medicine news :

1. Researchers Profile the Light Smoker
2. Alarming Rise in Autism Brings Hundreds of Parents, Researchers and Clinicians Together from Around the World to Atlanta April 17-19, 2009
3. PhRMA Honors Gardasil(r) Researchers With Discoverers Award
4. Researchers identify personality traits
5. Young eye researchers receive prestigious ARVO-AFER/Merck award
6. UT Southwestern researchers reveal how the brain processes important information
7. Researchers Test Lithium as Radiation Protector
8. UCI researchers find new way to fight cocaine addiction
9. Researchers question effectiveness of warning labels on over-the-counter drugs
10. Researchers Successfully Create Computer-Simulated Model for Evaluating Artificial Pancreas
11. Yale researchers discover mechanism for
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... Calif. (PRWEB) , ... October 13, 2017 , ... Many ... dementia. However, many long-term care insurance companies have a waiver for care if the ... 90-day elimination period, when the family pays for care, is often waived, so the ...
(Date:10/13/2017)... ... , ... Global Healthcare Management’s 4th Annual Kids Fun Run brought out many ... event, sponsored by Global Healthcare Management’s CEO, Jon Letko, is aimed at getting kids ... of all ages; it is a non-competitive, non-timed event, which is all about having ...
(Date:10/13/2017)... ... October 13, 2017 , ... Coveros, a ... has been awarded a contract by the Center for Medicare and Medicaid Services ... accelerate the enterprise use of Agile methodologies in a consistent and high value ...
(Date:10/12/2017)... , ... October 12, 2017 , ... ... services for healthcare compliance program management, will showcase a range of technology and ... for Assisted Living (NCAL) Convention and Expo to be held October 14–18, 2017 ...
(Date:10/12/2017)... Wis. (PRWEB) , ... October 12, 2017 , ... ... standard products to meet the demand of today’s consumer and regulatory authorities worldwide. ... of probiotic experts and tested to meet the highest standard. , These ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... ORANGE COUNTY, Calif. , Oct. 10, 2017  NDS received ... Mobile  — a medical-grade battery-powered display stand specifically designed for ... aims to transform technology into a clinical solution to support the ... costs. Innovative Design ... NDS ZeroWire Mobile Wireless Solution ...
(Date:10/4/2017)... to the Centers for Disease Control and Prevention (CDC), influenza vaccination ... is helping communities across Massachusetts , Connecticut ... flu shots through the end of the month. *Some exclusions ... ... shot is by the end of October, according to the Centers for ...
(Date:10/2/2017)... , Oct. 2, 2017 Halo Labs announces the European ... system called the HORIZON at MIBio 2017 in Cambridge, ... and visible particulate matter in biopharmaceutical samples with unprecedented speed and ... the novel technique Backgrounded Membrane Imaging. ... The HORIZON subvisible particle analysis system ...
Breaking Medicine Technology: