Navigation Links
UC Davis researchers identify a cellular pathway that makes prostate cancer fatal
Date:11/28/2007

(SACRAMENTO, Calif.) Expanding evidence that tiny strands of RNA called microRNAs play big roles in the progress of some cancers, UC Davis researchers have identified one that helps jump start prostate cancer cell growth midway through the disease process, eventually causing it to become fatal. The discovery is an important link to finding new treatments targeting this cellular function and reducing cancer deaths among American men.

A number of cancer researchers are interested in microRNAs and how they are involved in diseases like leukemia, said Ralph deVere White, director of the UC Davis Cancer Center, professor of urology and senior author on the study. But this is the first research to specifically look at the functional effects of microRNAs on the progression of prostate cancer.

Relatively new discoveries in genetic research, microRNAs are small, single strands of RNA that regulate gene expression processes between larger strands of RNA. Working with 19 samples from the cancer centers repository of prostate cancer cells, deVere White and his team used high-resolution analysis techniques to identify microRNAs that were differentially expressed. Of five that were distinct, one miR-125b caught their attention because of its presence at high levels in both androgen-dependent and androgen-independent prostate cancer cells. Androgens, such as testosterone, are known to promote tumor growth. While androgen suppression treatments slow the progress of prostate cancer, they do not cure it.

One of the most confounding things about prostate cancer is that after a period of success with androgen suppression therapy, the cancer starts to thrive again, deVere White explained. Thats when the disease becomes fatal. This particular microRNA supports the ability of prostate cancer cells to exist and grow in its androgen-independent state. And we currently have no effective treatments for the androgen-independent state of the disease.

Now having identified a cellular link between the two phases of prostate cancer, deVere White and colleagues are hopeful that miR-125b screening will at some point become a standard diagnostic tool and that genetic and chemotherapy treatments can be developed that remove this essential survival mechanism for cancer cells. Before this can happen, the team needs to first find out if a microRNA knockout can be safely accomplished.

We simply dont know yet all that microRNAs do for us, said deVere White. We will use animal models to see if we can reduce or remove one of more of them without interfering with other essential molecular functions.

Another important next step is to identify the full range of microRNAs involved in prostate cancer.

There are believed to be thousands of microRNAs, and we have only identified a handful that is important to prostate cancer, said Xu-Bao Shi, a project scientist with the UC Davis Department of Urology and lead author on the study. We must next identify if others are involved along with their regulating patterns and mechanisms in order to gain a more comprehensive picture of how they contribute to the onset and progression of the disease. Our study definitely opens up a whole new avenue in prostate cancer research.


'/>"/>

Contact: Karen Finney
karen.finney@ucdmc.ucdavis.edu
916-734-9064
University of California - Davis - Health System
Source:Eurekalert

Related medicine news :

1. S.C. BlueCross Creates Corporate Planning Unit, Promotes Davis to Vice President
2. ABC TV San Francisco Features Canine Cancer Research Story: Saving Our Dogs, Helping Humans Beat Cancer - Work at Morris Animal Foundation, UC-Davis
3. After Dropping 162 Pounds, Jodi Davis Inspires Other Michigan Women to Get Moving and Lose Weight Through WalkyTalk.com(TM)
4. UC Davis researchers find evidence of mature heart cell potential in embryonic stem cells
5. UC Davis researchers discover novel pathway to increased inflammation in diabetes patients
6. Stanford researchers find culprit in aging muscles that heal poorly
7. UCLA researchers identify markers that may predict diabetes in still-healthy people
8. Mayo Clinic researchers discover new diagnostic test for detecting infection in prosthetic joints
9. Bipolar disorder relapses halved by Melbourne researchers
10. Cell that triggers symptoms in allergy attacks can also limit damage, Stanford researchers find
11. High and mighty: first common height gene identified by researchers behind obesity gene finding
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... Brent Kasmer, a legally blind and certified personal trainer is ... a fitness app. The fitness app plans to fix the two major problems leading the ... one size fits all type program , They don’t eliminate all the reasons ...
(Date:6/25/2016)... ... ... Austin residents seeking Mohs surgery services, can now turn to Dr. Jessica Scruggs ... for medical and surgical dermatology. , Dr. Dorsey brings specialization to include Mohs surgery, ... Micrographic Surgery completed by Dr. Dorsey was under the direction of Glenn Goldstein, MD, ...
(Date:6/25/2016)... ... ... First Choice Emergency Room , the largest network of independent freestanding emergency ... its new Mesquite-Samuell Farm facility. , “We are pleased to announce Dr. Ogunleye ... M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. , Dr. Ogunleye ...
(Date:6/25/2016)... ... , ... On Friday, June 10, Van Mitchell, Secretary of the Maryland Department ... in recognition of their exemplary accomplishments in worksite health promotion. , The Wellness at ... Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire was one of 42 ...
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced traumatic events ... turn to unhealthy avenues, such as drug or alcohol abuse, as a coping mechanism. ... tools for healthy coping following a traumatic event. , Trauma sufferers tend to feel ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... June 26, 2016 Story ... operating models within the health care industry is causing ... efficiency , Deloitte offers a suite of solutions ... issues impacting efficient cost optimization: labor resource analysis, revenue ... services facilitate better outcomes and better economics ...
(Date:6/24/2016)... June 24, 2016 ... announced the addition of the " Global Markets ... This report focuses ... an updated review, including its applications in various applications. ... market, which includes three main industries: pharmaceutical and biotechnology, ...
(Date:6/24/2016)... -- Research and Markets has announced the addition ... report to their offering. ... The World Market for Companion Diagnostics covers the world ... in the report includes the following: , ... by Region (N. America, EU, ROW), 2015-2020 , World ...
Breaking Medicine Technology: