Featured Research

from universities, journals, and other organizations

Genomic analysis lends insight to prostate cancer

Date:
May 23, 2013
Source:
Mayo Clinic
Summary:
Researchers have used next generation genomic analysis to determine that some of the more aggressive prostate cancer tumors have similar genetic origins, which may help in predicting cancer progression.

Mayo Clinic researchers have used next generation genomic analysis to determine that some of the more aggressive prostate cancer tumors have similar genetic origins, which may help in predicting cancer progression. The findings appear online today in the journal Cancer Research.

"This is the first study to examine DNA alterations using next generation sequencing in adjacent Gleason patterns in the same tumor allowing us to correlate genomics with changes in pathology," says John Cheville, M.D., Mayo Clinic pathologist and one of the authors on the paper.

The standard method of evaluating prostate cancer biopsy samples is a numerical scoring system called Gleason grading. A pathologist examines the tumor sample under the microscope, giving it a Gleason score based on the pattern of its cells. Since many prostate cancers contain more than one pattern, the two most common patterns are added together to provide the Gleason score. The Gleason score is the strongest predictor of outcome, with high scores indicating more aggressive prostate cancer. This study focused on Gleason patterns of three and four (Gleason score 7), a combination that indicates a cancer with increased risk of progression.

"While each pattern had its own breakpoints, they shared identical ones, which implies a common origin," Dr. Cheville says. DNA changes associated with aggressive prostate cancer were identified in the lower Gleason pattern, indicating that genomic changes occurred before they could be recognized by a pathologist. By understanding these lineage relationships within a tumor, he says, physicians will be better able to predict progression of the cancer and, in turn, better manage patients including those who chose no treatment but enter a follow-up program called active surveillance.

To determine relationships among the Gleason patterns of each tumor sample the team used laser capture micro dissection, whole genome amplification and next generation sequencing. They examined 14 tumors and found over 3,000 unique chromosomal alterations among all tumors and 300 that appeared in at least two of the tumors. They also found that Gleason pattern 3 in each tumor had more alterations in common with its corresponding Gleason pattern 4 than it did with Gleason pattern 3 from other patients.

Others involved in the study are co-first author Irina Kovtun, Ph.D.; Stephen Murphy, Ph.D.; Sarah Johnson; Shabnam Zarei, M.D.; Farhad Kosari, Ph.D.; William Sukov, M.D.; R. Jeff Karnes, M.D. and George Vasmatzis, Ph.D.

The research was supported by a Waterman Biomarker Discovery grant; and by the Center for Individualized Medicine, the Office of Intellectual Property, and the Department of Laboratory Medicine and Pathology, all at Mayo Clinic. Tissue samples were provided by the National Institutes of Health.


Story Source:

The above story is based on materials provided by Mayo Clinic. Note: Materials may be edited for content and length.


Journal Reference:

  1. I. V. Kovtun, J. C. Cheville, S. J. Murphy, S. H. Johnson, S. Zarei, F. Kosari, W. R. Sukov, R. J. Karnes, G. Vasmatzis. Lineage Relationship of Gleason Patterns in Gleason Score 7 Prostate Cancer. Cancer Research, 2013; 73 (11): 3275 DOI: 10.1158/0008-5472.CAN-12-2803

Cite This Page:

Mayo Clinic. "Genomic analysis lends insight to prostate cancer." ScienceDaily. ScienceDaily, 23 May 2013. <www.sciencedaily.com/releases/2013/05/130523162300.htm>.
Mayo Clinic. (2013, May 23). Genomic analysis lends insight to prostate cancer. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2013/05/130523162300.htm
Mayo Clinic. "Genomic analysis lends insight to prostate cancer." ScienceDaily. www.sciencedaily.com/releases/2013/05/130523162300.htm (accessed July 29, 2014).

Share This




More Health & Medicine News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Ebola Virus Threatens West Africa

Deadly Ebola Virus Threatens West Africa

AP (July 28, 2014) West African nations and international health organizations are working to contain the largest Ebola outbreak in history. It's one of the deadliest diseases known to man, but the CDC says it's unlikely to spread in the U.S. (July 28) Video provided by AP
Powered by NewsLook.com
$15B Deal on Vets' Health Care Reached

$15B Deal on Vets' Health Care Reached

AP (July 28, 2014) A bipartisan deal to improve veterans health care would authorize at least $15 billion in emergency spending to fix a veterans program scandalized by long patient wait times and falsified records. (July 28) Video provided by AP
Powered by NewsLook.com
Two Americans Contract Ebola in Liberia

Two Americans Contract Ebola in Liberia

Reuters - US Online Video (July 28, 2014) Two American aid workers in Liberia test positive for Ebola while working to combat the deadliest outbreak of the virus ever. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins