Navigation Links
Scientists discover how rapamycin slows cell growth
Date:5/23/2013

This news release is available in French.

University of Montreal researchers have discovered a novel molecular mechanism that can potentially slow the progression of some cancers and other diseases of abnormal growth. In the May 23 edition of the prestigious journal Cell, scientists from the University of Montreal explain how they found that the anti-cancer and anti-proliferative drug rapamycin slows down or prevents cells from dividing.

"Cells normally monitor the availability of nutrients and will slow down or accelerate their growth and division accordingly. A key monitor of nutrients is a protein called the Target of Rapamycin (TOR), but we do not know the details of how this protein feeds signals downstream to control growth says Dr. Stephen Michnick, senior author and a University of Montreal biochemistry professor. He adds that, "we were surprised to find that TOR hooks up to a circuit that controls the exit of cells from division which in turn modulates the RNA message that codes for a key cell cycle regulator called B-cyclin".

In collaboration with Daniel Zenklusen, also a University of Montreal biochemistry professor and lead author and doctoral candidate Vincent Messier, discovered that when cells are starved for nutrients TOR sends a signal to shut down production of a chemical message in the form of RNA to synthesize B cyclin ", Dr. Michnick explained. "We also found that TOR acts through a previously unforeseen intermediary, a protein that makes small chemical modifications to proteins normally stabilize B cyclin ", he added. "We have known that starvation and a drug that mimics starvation, rapamycin, affects B cyclin synthesis, but we didn't know how. Our studies now point to one mechanism", noted Dr. Messier.

Dr. Zenklusen emphasized that, "this is an important finding with implications for our understanding on how the normal organism interprets its environment to control growth and it was a surprise to find a mechanism that works through the RNA that codes for a regulatory protein. Dr. Michnick adds, "rapamycin is a promising therapy for some cancers and other devastating maladies such as the rare lung disease called lymphangioleiomyomatosis (LAM). It remains to be seen whether the pathway we have discovered might be an alternative target for the development of therapeutics against these diseases."


'/>"/>

Contact: Julie Gazaille
j.cordeau-gazaille@umontreal.ca
514-343-6796
University of Montreal
Source:Eurekalert

Related medicine news :

1. Scientists solving the mystery of human consciousness
2. Scientists uncover multiple faces of deadly breast cancer
3. Scientists identify major source of cells defense against oxidative stress
4. Scientists tailor cell surface targeting system to hit organelle ZIP codes
5. Scientists rewrite rulebook on breast cancer in landmark global study
6. Warwick scientists uncover how checkpoint proteins bind chromosomes
7. NIH scientists link quickly spreading gene to Asian MRSA epidemic
8. Joslin scientists identify important mechanism that affects the aging process
9. Scripps Research scientists show how memory B cells stay in class to fight different infections
10. Scientists Map Melanomas Genome
11. A*STAR scientists discover switch to boost anti-viral response to fight infectious diseases
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/9/2016)... ... December 09, 2016 , ... ... pharmaceutical inserts and outserts. As a means of expanding capabilities Flottman has ... enable Flottman to individually code professional inserts (PIs) and patient package inserts (PPIs) ...
(Date:12/9/2016)... York, NY (PRWEB) , ... December 09, 2016 , ... ... raises awareness for organ transplantation while encouraging readers to sign up as an organ ... a lifesaving organ transplant. , An organ donor can save up to 8 ...
(Date:12/8/2016)... (PRWEB) , ... December 08, 2016 , ... ... will become Quality Insights beginning January 1, 2017. The name change aligns ... commitment to measuring and improving health care quality. , “We are very proud ...
(Date:12/8/2016)... Pa. (PRWEB) , ... December 08, 2016 , ... ... Medicine Southern Chester County, a Property owned by an affiliate of Seavest, has ... square foot Penn Medicine Southern Chester County ambulatory care center (ACC) was named ...
(Date:12/8/2016)... ... December 08, 2016 , ... Premier Fitness Camp (PFC) and The ... ultimate weight loss and wellness program, at their world headquarters of Omni La Costa ... and long-term results to anyone seeking weight loss, personal development, a healthy lifestyle, or ...
Breaking Medicine News(10 mins):
(Date:12/8/2016)... DUBLIN , Dec 8, 2016 Research and Markets ... Report" report to their offering. ... This report analyzes the worldwide markets for ... US, Canada , Japan , ... , and Rest of World. Annual estimates and forecasts are provided ...
(Date:12/8/2016)... 2016 Bodycad announced it has been ... accuracy, reproducibility and speed for 3D constructs via ... bone orthopaedic applications. These patents are critical to ... restorations based on each patient,s distinct anatomy. ... harnesses the world,s first suite of orthopaedic CAD/CAM ...
(Date:12/8/2016)... , Dec. 8, 2016 True Health ... brings leading-edge laboratory services and management expertise to ... , allowing more doctors and patients to ... management solutions. Logo - http://photos.prnewswire.com/prnh/20161208/447162LOGO ... Hospital systems, under pressure to contain costs, have ...
Breaking Medicine Technology: