Navigation Links
SFU duo's protein discovery links to cancer research
Date:7/26/2012

A Simon Fraser University graduate student's collaboration with her thesis supervisor on how a particular type of protein controls the growth of another protein could advance cancer research.

Their findings have just been published in the online July 26 issue of Current Biology, a CellPress journal.

Esther Verheyen, an SFU professor of molecular biology and biochemistry, has helped her Master's of Science student Joanna Chen uncover how Hipk can be manipulated to stop Yorkie from causing tissue overgrowth in flies.

Hipk is a protein kinase a type of enzyme that controls the activity of other proteins by depositing a phosphate residue on them.

Yorkie, known as Yap in humans, is another type of protein that induces the overgrowth of cell tissue in the eyes, legs and wings of flies. High levels of Yap are often found in human tumours.

In experiments on the fruit fly Drosophila, Verheyen and Chen first found that Hipk could cause overgrowths similar to those found on tissue with too much Yorkie.

The researchers then genetically generated flies in which there was a higher concentration of Yorkie but a lower concentration of Hipk present than normal in their organ and limb tissues.

"When we did that," says Chen, "Yorkie could not cause overgrowths anymore. We were able to show this need for Hipk to be present in a number of different fly tissues, such as the eyes, legs and wings."

"We found that Hipk could add a phosphate residue on Yorkie and we thought this might explain how Hipk could disrupt Yorkie's ability to cause an overgrowth," adds Verheyen. "This is a very common and reversible method of regulating protein activity, and, as a result, many essential developmental processes."

"Next we tested a mutant form of Hipk that had lost its ability to add phosphates to Yorkie," says Verheyen. "This form of Hipk could no longer prompt Yorkie to trigger cell proliferation or do anything to regulate cell growth.

"Hipk is the first discovery of a protein kinase that regulates Yorkie by stimulating its cell proliferation ability. All other known protein kinases either directly inhibit or block Yorkie from working."

Chen and Verheyen say their discovery is generating a lot of excitement in the molecular biology science community. "We have identified a factor that in flies is required for even overly active Yorkie to trigger overgrowth," explains Chen, who graduated in June. She begins working as a research assistant at the Vancouver Prostate Centre in August.

"By analogy, perhaps the human form of Hipk is needed in cells for overly active Yap (human form of Yorkie) to induce tumours. So if we can inhibit or reduce Hipk activity, it would allow us to prevent overgrowths and possibly cancer caused by excessive Yap in humans."

The two are now checking to see if this new cell growth regulation mechanism they've discovered is conserved across different species, including mice, which have similar Hipk proteins to humans.


'/>"/>

Contact: Carol Thorbes
cthorbes@sfu.ca
778-782-3035
Simon Fraser University
Source:Eurekalert

Related medicine news :

1. Protein build-up leads to neurons misfiring
2. Strong communication between brain and muscle requires both having the protein LRP4
3. Regulation by proteins outside cancer cells points to potential new drug target
4. Loss of protein SPDEF allows prostate cancer cells to gain foothold at possible sites of metastasis
5. The key (proteins) to self-renewing skin
6. Researchers discover rare leukemia-causing protein
7. PaleoMeal Organic Whey Protein Formula Improved According to Rockwell Nutrition
8. Moving 3D computer model of key human protein is powerful new tool in fight against cancer
9. Researchers reveal crucial immune fighter role of the STING protein
10. Protein residues kiss, dont tell
11. Overexpression of proteins 14-3-3 related to chemotherapy resistance
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/12/2017)... ... October 12, 2017 , ... IsoComforter, Inc. ( https://isocomforter.com ... introduction of an innovative new design of the shoulder pad. The shoulder pad ... comfort while controlling your pain while using cold therapy. By utilizing ice and water ...
(Date:10/12/2017)... ... 12, 2017 , ... Information about the technology: , Otomagnetics ... enable prevention of a major side effect of chemotherapy in children. Cisplatin and ... For cisplatin, hearing loss is FDA listed on-label as a dose limiting toxicity. ...
(Date:10/12/2017)... , ... October 12, 2017 , ... Leading pediatric oncology ... in Washington, D.C., for the 49th Congress of the International Society of Paediatric ... President of the Center for Cancer and Blood Disorders at Children’s National, ...
(Date:10/12/2017)... ... , ... Health Literacy Innovations (HLI), creator of the Health ... Cancer Patient Education Network (CPEN), an independent professional organization that shares best practices ... , As CPEN’s strategic partner, HLI will help support CPEN members by ...
(Date:10/12/2017)... D.C. (PRWEB) , ... October 12, 2017 , ... ... Cal Dining at the University of California Berkeley, and other leading institutions in ... the buying power of institutions to change the way animals are raised for ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... Pa. , Oct. 10, 2017   West ... in innovative solutions for injectable drug administration, today shared ... West,s ID Adapter for improving the intradermal administration of ... Fourth Skin Vaccination Summit in May 2017 by Dr. ... Lead, Polio Department, World Health Organization (WHO), and recently ...
(Date:10/5/2017)... Ill. , Oct. 5, 2017  In ... Association of Oral and Maxillofacial Surgeons (AAOMS) released ... opioids – to be used as a first-line ... pain. Recognizing ... the AAOMS White Paper "Opioid Prescribing: Acute and ...
(Date:10/4/2017)... WESTWOOD, Mass. , Oct. 4, 2017  According to the Centers ... by the end of October . PhysicianOne Urgent Care is helping communities ... Westchester, NY , by offering no-cost* flu shots through ... , as mandated by certain health insurance regulations. ... The best time to get a flu shot is by ...
Breaking Medicine Technology: