Featured Research

from universities, journals, and other organizations

Newly identified biomarkers may help predict progression of Barrett's esophagus to esophageal adenocarcinoma

Date:
March 6, 2013
Source:
American Association for Cancer Research (AACR)
Summary:
A series of microRNA expression signatures may help to define progression of the precancerous condition Barrett's esophagus into esophageal adenocarcinoma.

A series of microRNA expression signatures that may help to define progression of the precancerous condition Barrett's esophagus into esophageal adenocarcinoma was reported recently in Cancer Prevention Research, a journal of the American Association for Cancer Research.

"Once a rare cancer representing only 5 percent of all esophageal cancers in the United States, esophageal adenocarcinoma is the cancer with the fastest-rising incidence -- six-fold increase in the past three decades -- and currently comprises more than 80 percent of all new esophageal cancer cases in this country," said Xifeng Wu, M.D., chair of the Department of Epidemiology, Division of Cancer Prevention and Population Sciences at The University of Texas MD Anderson Cancer Center, in Houston. "To reduce the mortality of esophageal adenocarcinoma, the best hope in the near term is to detect it at its early stage, or even better, to prevent the progression of esophageal adenocarcinoma from its premalignant lesion, which is called Barrett's esophagus."

Wu and colleagues evaluated microRNAs, which are a class of small ribonucleic acids in cells capable of regulating a large number of genes. Research has shown that aberrant expression of microRNAs is involved in cancer development.

The researchers compared hundreds of microRNAs in normal esophageal epithelia and in Barrett's esophagus and esophageal adenocarcinoma tissues of different histological grades with distinct progression risks. They identified a number of differentially expressed microRNAs at each histological stage.

"The expression of microRNAs in Barrett's esophagus and esophageal adenocarcinoma tissues was remarkably similar, indicating that the microRNA aberrations were very early events in the development of Barrett's esophagus," Wu said. "These aberrations in microRNA expression may drive other late events that ultimately lead to carcinoma formation."

The researchers also identified a small number of microRNAs that were significantly different between Barrett's esophagus and esophageal adenocarcinoma. Specifically, downregulation of the microRNA miR-375 and upregulation of five microRNAs of the miR-17-92 and homologue family seemed to differentiate Barrett's esophagus and esophageal adenocarcinoma.

"Therefore, those patients with Barrett's esophagus with low levels of miR-375 and/or high levels of the other five microRNAs we found to be upregulated in esophageal adenocarcinoma are at increased risk for malignant progression and should be under intensive surveillance, screening and treatment of their Barrett's esophagus," Wu said.

"Defining the protein-coding genes targeted by the differentially expressed microRNAs we identified may provide significant biological insights into the development of esophageal adenocarcinoma," she added. "Moreover, these genes may themselves become promising biomarkers to predict Barrett's esophagus progression as well as potential preventive and therapeutic targets."


Story Source:

The above story is based on materials provided by American Association for Cancer Research (AACR). Note: Materials may be edited for content and length.


Journal Reference:

  1. X. Wu, J. A. Ajani, J. Gu, D. W. Chang, W. Tan, M. A. T. Hildebrandt, M. Huang, K. K. Wang, E. Hawk. MicroRNA Expression Signatures during Malignant Progression from Barrett's Esophagus to Esophageal Adenocarcinoma. Cancer Prevention Research, 2013; 6 (3): 196 DOI: 10.1158/1940-6207.CAPR-12-0276

Cite This Page:

American Association for Cancer Research (AACR). "Newly identified biomarkers may help predict progression of Barrett's esophagus to esophageal adenocarcinoma." ScienceDaily. ScienceDaily, 6 March 2013. <www.sciencedaily.com/releases/2013/03/130306083811.htm>.
American Association for Cancer Research (AACR). (2013, March 6). Newly identified biomarkers may help predict progression of Barrett's esophagus to esophageal adenocarcinoma. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2013/03/130306083811.htm
American Association for Cancer Research (AACR). "Newly identified biomarkers may help predict progression of Barrett's esophagus to esophageal adenocarcinoma." ScienceDaily. www.sciencedaily.com/releases/2013/03/130306083811.htm (accessed October 23, 2014).

Share This



More Health & Medicine News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Fears Keep Guinea Hospitals Empty

Ebola Fears Keep Guinea Hospitals Empty

AP (Oct. 23, 2014) Fears of Ebola are keeping doctors and patients alike away from hospitals in the West African nation of Guinea. (Oct. 23) Video provided by AP
Powered by NewsLook.com
Orthodontist Mom Jennifer Salzer on the Best Time for Braces

Orthodontist Mom Jennifer Salzer on the Best Time for Braces

Working Mother (Oct. 22, 2014) Is your child ready? Video provided by Working Mother
Powered by NewsLook.com
U.S. Issues Ebola Travel Restrictions, Are Visa Bans Next?

U.S. Issues Ebola Travel Restrictions, Are Visa Bans Next?

Newsy (Oct. 22, 2014) Now that the U.S. is restricting travel from West Africa, some are dropping questions about a travel ban and instead asking about visa bans. Video provided by Newsy
Powered by NewsLook.com
More People Diagnosed With TB In 2013, But There's Good News

More People Diagnosed With TB In 2013, But There's Good News

Newsy (Oct. 22, 2014) The World Health Organizations says TB numbers rose in 2013, but it's partly due to better detection and more survivors. Video provided by Newsy
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