Navigation Links
Research team identifies new mechanism with suspected role in cancer
Date:10/18/2010

PROVIDENCE, R.I. [Brown University] If women had no prolactin receptors on cells in their mammary glands, they would not produce milk when they were nursing. Prolactin receptors are also found in other organs including the lung and the colon. The only problem is that these receptors are sort of like cellular wiring, and when the wrong conditions bring them together, the resulting short circuit can produce cancer.

In new research published online Oct. 18, 2010, in the Proceedings of the National Academy of Science, a team led by researcheres at Brown University and Rhode Island Hospital has identified a key chemical process by which cells with prolactin receptors can sometimes take that turn for the worse.

That key step is called "acetylation" a chemical reaction inside the cell, triggered by the binding of the arrival of the prolactin hormone at the receptor. That process can draw prolactin receptors together into a structure called a "dimer." Like a pair of chopsticks, this dimer structure is just right to pick up growth factors in the body that can lead to cancerous growth, said Y. Eugene Chin, associate professor of surgery (research) in the Warren Alpert Medical School of Brown University, based at Rhode Island Hospital.

"Our findings may provide an important clue about how to develop drugs to break down receptor dimers in breast cancer therapy," said Chin, a senior author on the paper that also involved researchers from Zhejiang University School of Medicine in China and the University of Rochester in Rochester, N.Y.

Normally, a shared positive electrical charge and the resulting mutual repulsion keeps prolactin receptors from coming together. In their experiments, the team found that when prolactin binds to the receptors outside the cells, the acetylation neutralizes that charge on the receptors inside the cells, allowing the receptor molecules to come together, Chin said.

The more prolactin receptors a cell has, the more susceptible it is to this problem occurring, Chin said. Overexpression of prolactin receptors in patients has been linked to cancer in the past.

Chin, who has been investigating the molecular basis of cancer for years, said he is encouraged about uncovering this new step. He points to drugs, such as Herceptin, that target receptors to combat cancer.

"This will be extremely important for breast cancer and other cancer therapy by targeting receptors," he said.

One possibility will be developing monoclonal antibodies to target the prolactin receptors directly, he said. But artificial compounds could also be developed to block the receptors from joining as dimers.


'/>"/>

Contact: David Orenstein
david_orenstein@brown.edu
401-863-1862
Brown University
Source:Eurekalert

Related medicine news :

1. Embedded Mobile & M2M Device revenues to Rise to Almost $19 Billion Globally by 2014, Says Juniper Research
2. 2010 HSR Impact Award recognizes surgical safety research
3. MSU launches first anti-counterfeiting research program
4. Researchers map all the fragile sites of the yeast Saccharomyces cerevisiaes genome
5. UH Case Medical Center researchers publish promising findings for advanced cervical cancer
6. Researchers discover new way to kill pediatric brain tumors
7. Family Research Council: Planned Parenthood Report Oversexualizes Ten-Year-Olds, Undermines Parental Authority
8. Michael J. Fox Foundation Awards $1 Million to Drive Critical New Research Tools and Technologies in Parkinsons Drug Development
9. Luth Researchs IndicatorEDG(TM) Study Finds Americans Hopes of Achieving Their Dreams Are Fading
10. International Diabetes Federation awards $2 million to 9 global diabetes research projects
11. Gladstones Robert Mahley to receive Research!America advocacy award
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2017)... ... ... My T Chai, a South African company that creates a number of ... a popular website specializing in sales of nutritional products. , Chai tea is ... It spread across Asia and Africa quickly, and today recipes vary from region to ...
(Date:4/24/2017)... ... April 24, 2017 , ... ... expected to be diagnosed globally; approximately 25,000 of them will be malignant.(1) As ... use of this type of healthcare model in the diagnosis and treatment of ...
(Date:4/24/2017)... , ... April 24, 2017 , ... As a former ... a thousand words. The good news for single women is that she put all ... is available on April 25th. Joan's insight, personal experiences and sparkling sense of humor ...
(Date:4/24/2017)... ... April 24, 2017 , ... A new global study of ... student well-being has seriously declined. "When disenfranchised youth from the heart of our ... State to turn the historic multi-ethnic and multi-religious powerhouses of the Middle East ...
(Date:4/24/2017)... ... April 24, 2017 , ... Miami ... attending the 2017 Oral Reconstruction Foundation’s 2017 Symposium on Tissue Regeneration and Implant ... will present its annual Global Symposium at the Fontainebleau Hotel located in Miami ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... , April 19, 2017  IRIDEX Corporation (Nasdaq: ... release financial results for the first quarter 2017 after ... The Company,s management team will host a corresponding conference ... ET. Investors interested in listening to the ... for domestic callers or (703) 326-3030 for international callers, ...
(Date:4/19/2017)... DALLAS , April 19, 2017  Vanderbilt ... the first patients in Nashville , ... the Lower Esophageal Sphincter Stimulation for GERD (LESS GERD) ... designed to provide long-term reflux control by restoring normal ... affects nearly 65 million people in the ...
(Date:4/19/2017)... -- Companion animal vaccines are ... such as canine, avian and feline. ... as Attenuated Live Vaccines, Conjugate Vaccines, Inactivated Vaccines, ... Vaccines. Attenuated live vaccines are derived from disease-causing ... been weakend under laboratory conditions. Conjugate vaccines are ...
Breaking Medicine Technology: