Featured Research

from universities, journals, and other organizations

Measuring segments of genetic material may help predict, monitor recurrence of thyroid cancer

Date:
October 28, 2013
Source:
Wiley
Summary:
A new analysis has found that the presence of short segments of genetic material (known as microRNA) within papillary thyroid cancer tumors suggests a likelihood of recurrence after patients undergo surgery. The study also found that elevated blood levels of the genetic material after surgery may indicate a higher possibility of recurrence after thyroidectomy.

A new analysis has found that the presence of short segments of genetic material (known as microRNA) within papillary thyroid cancer tumors suggests a likelihood of recurrence after patients undergo surgery. The study, which is published early online in CANCER, a peer-reviewed journal of the American Cancer Society, also found that elevated blood levels of the genetic material after surgery may indicate a higher possibility of recurrence after thyroidectomy.

Related Articles


MicroRNAs are copies of very short segments of genetic material that modulate gene expression. Researchers have found that dysregulation of microRNAs may play a role in the development of cancer, and microRNA profiles or "signatures" may be used to classify different types of thyroid tumors.

By studying tumor tissue from patients with papillary thyroid cancer, the most common endocrine malignancy, PhD candidate James Lee, MBBS, FRACS, of the Kolling Institute of Medical Research and University of Sydney in Australia, under supervision from Professor Stan Sidhu, and his colleagues found that high levels of two specific microRNAs (microRNA-222 and -146b) within tumors indicated that cancer was more likely to recur after patients' tumors were surgically removed.

"This kind of test may help doctors select which patients may need more aggressive additional treatment after surgery, or be monitored more closely after initial treatment," said Lee. "As most patients with papillary type thyroid cancer do very well with standard treatment, we are always working on ways to help us select the small group that do not fair so well so we can use our medical resources more efficiently and minimize interruptions to patients' lives."

Also, the same two microRNAs were present at high levels in the blood of thyroid cancer patients compared with healthy individuals, but after thyroid surgery, the blood levels in the patients fell to normal levels. "This suggests that we may be able to track the presence of papillary thyroid cancer by a microRNA blood test," said Lee. Dr. Lee added that the current blood test for the detection of recurrent papillary thyroid cancer is not accurate in up to a quarter of patients either because of interference from the patients' antibodies or other cancer-related factors. "Therefore, an alternative blood test measuring microRNA levels would be a great complement to what is already available," he said. Blood levels of the microRNAs may not be a good initial diagnostic tool for papillary thyroid cancer, though, because study participants with multinodular goiter, which is a common non-cancer thyroid condition, also had elevated levels in their blood. Also, the specific threshold miRNA level at which additional treatment would be warranted remains to be clarified.

Follow-up studies are needed to see if blood levels of microRNA-222 and microRNA-146b actually do increase when cancer recurs. Also, the accuracy of both tests -- performed on tumors and on blood samples -- needs to be improved before the tests can become clinically useful.


Story Source:

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


Journal Reference:

  1. James C. Lee, Jing Ting Zhao, Roderick J. Clifton-Bligh, Anthony Gill, Justin S. Gundara, Julian C. Ip, Anthony Glover, Mark S. Sywak, Leigh W. Delbridge, Bruce G. Robinson, Stanley B. Sidhu. MicroRNA-222 and MicroRNA-146b are tissue and circulating biomarkers of recurrent papillary thyroid cancer. Cancer, 2013; DOI: 10.1002/cncr.28254

Cite This Page:

Wiley. "Measuring segments of genetic material may help predict, monitor recurrence of thyroid cancer." ScienceDaily. ScienceDaily, 28 October 2013. <www.sciencedaily.com/releases/2013/10/131028090605.htm>.
Wiley. (2013, October 28). Measuring segments of genetic material may help predict, monitor recurrence of thyroid cancer. ScienceDaily. Retrieved March 6, 2015 from www.sciencedaily.com/releases/2013/10/131028090605.htm
Wiley. "Measuring segments of genetic material may help predict, monitor recurrence of thyroid cancer." ScienceDaily. www.sciencedaily.com/releases/2013/10/131028090605.htm (accessed March 6, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, March 6, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Suicide Rates Up For Young Women In U.S.

Suicide Rates Up For Young Women In U.S.

Newsy (Mar. 6, 2015) According to a report from the CDC, suicide rates among young women increased from 1994 to 2012 while rates among young men have decreased. Video provided by Newsy
Powered by NewsLook.com
Bupa Eyes India Healthcare Opportunities

Bupa Eyes India Healthcare Opportunities

Reuters - Business Video Online (Mar. 5, 2015) Bupa is hoping to expand in India&apos;s fast-growing health insurance market, once a rule change on foreign investment is implemented. The British private healthcare group&apos;s CEO tells Grace Pascoe why it&apos;s so keen on the new opportunity. Video provided by Reuters
Powered by NewsLook.com
Liberia Releases Last Ebola Patient, But Threat Remains

Liberia Releases Last Ebola Patient, But Threat Remains

Newsy (Mar. 5, 2015) Liberia&apos;s last Ebola patient has been released, and the country hasn&apos;t recorded a new case in a week. However, fears of another outbreak still exist. Video provided by Newsy
Powered by NewsLook.com
Doctor in Your Pocket Is Getting Smarter

Doctor in Your Pocket Is Getting Smarter

Reuters - Business Video Online (Mar. 5, 2015) Mobile apps are turning smartphones into a personal doctors, with users able to measure heart rate, blood pressure and even blood sugar. But will it change our behaviour? Ivor Bennett reports from the Mobile World Congress in Barcelona. Video provided by Reuters
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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