Featured Research

from universities, journals, and other organizations

Gut microbiome analysis improved noninvasive colorectal cancer screening

Date:
August 7, 2014
Source:
American Association for Cancer Research
Summary:
Analysis of the gut microbiome more successfully distinguished healthy individuals from those with precancerous adenomatous polyps and those with invasive colorectal cancer compared with assessment of clinical risk factors and fecal occult blood testing, according to data. "If our results are confirmed in larger groups of people, adding gut microbiome analysis to other fecal tests may provide an improved, noninvasive way to screen for colorectal cancer," researchers explained.

Analysis of the gut microbiome more successfully distinguished healthy individuals from those with precancerous adenomatous polyps and those with invasive colorectal cancer compared with assessment of clinical risk factors and fecal occult blood testing, according to data published in Cancer Prevention Research, a journal of the American Association for Cancer Research.

Related Articles


"A person's gut microbiome is the collection of all the bacteria in their gut," said Patrick D. Schloss, PhD, associate professor in the Department of Microbiology and Immunology at the University of Michigan in Ann Arbor. "The number of bacteria in the gut is huge; it outnumbers the number of cells in our bodies 10 to one, and the diversity of the bacteria present is critical to our health. By sequencing the V4 region of the 16S rRNA gene we were able to identify the bacteria present in each individual's gut microbiome.

"We found that the composition of the gut microbiome allowed us to identify who in our study had precancerous adenomatous polyps and who had invasive colorectal cancer," continued Schloss. "If our results are confirmed in larger groups of people, adding gut microbiome analysis to other fecal tests may provide an improved, noninvasive way to screen for colorectal cancer."

By analyzing stool samples from 90 individuals -- 30 healthy individuals, 30 patients with precancerous adenomatous polyps, and 30 patients with invasive colorectal cancer -- Schloss and his colleagues established that the composition of the gut microbiome was different for individuals in the three groups.

Using this information, they identified gut microbiome signatures for each group. Adding analysis of these signatures to assessment of age and race, which are clinical risk factors for precancerous adenomatous polyps, improved prediction of the presence of precancerous adenomatous polyps 4.5-fold. Adding analysis of the gut microbiome signatures to assessment of age, race, and body mass index (BMI), which are clinical risk factors of invasive colorectal cancer, improved prediction of the presence of invasive colorectal cancer 5.4-fold.

In addition, analysis of the gut microbiome signatures was better than fecal occult blood testing at distinguishing individuals with precancerous adenomatous polyps from those with invasive colorectal cancer (AUC=0.617 and AUC=0.952, respectively). Assessing BMI, fecal occult blood test results, and gut microbiome signatures together further improved the ability to distinguish between the two conditions (AUC=0.969).

"Our data show that gut microbiome analysis has the potential to be a new tool to noninvasively screen for colorectal cancer," said Schloss. "We don't think that this would ever replace other colorectal cancer screening approaches, rather we see it as complementary.

"The study involved not just microbiologists but also researchers skilled in statistics, genomics, and epidemiology," continued Schloss. "Its success shows just how important interdisciplinary science is."


Story Source:

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


Journal Reference:

  1. J. P. Zackular, M. A. M. Rogers, M. T. Ruffin, P. D. Schloss. The Human Gut Microbiome as a Screening Tool for Colorectal Cancer. Cancer Prevention Research, 2014; DOI: 10.1158/1940-6207.CAPR-14-0129

Cite This Page:

American Association for Cancer Research. "Gut microbiome analysis improved noninvasive colorectal cancer screening." ScienceDaily. ScienceDaily, 7 August 2014. <www.sciencedaily.com/releases/2014/08/140807105213.htm>.
American Association for Cancer Research. (2014, August 7). Gut microbiome analysis improved noninvasive colorectal cancer screening. ScienceDaily. Retrieved January 28, 2015 from www.sciencedaily.com/releases/2014/08/140807105213.htm
American Association for Cancer Research. "Gut microbiome analysis improved noninvasive colorectal cancer screening." ScienceDaily. www.sciencedaily.com/releases/2014/08/140807105213.htm (accessed January 28, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Wednesday, January 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Malnutrition on the Rise as Violence Flares in C. Africa

Malnutrition on the Rise as Violence Flares in C. Africa

AFP (Jan. 28, 2015) Violence can flare up at any moment in Bambari with only a bridge separating Muslims and Christians. Malnutrition is on the rise and lack of water means simple cooking fires threaten to destroy makeshift camps where people are living. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Poultry Culled in Taiwan to Thwart Bird Flu

Poultry Culled in Taiwan to Thwart Bird Flu

Reuters - News Video Online (Jan. 28, 2015) Taiwan culls over a million poultry in efforts to halt various strains of avian flu. Julie Noce reports. Video provided by Reuters
Powered by NewsLook.com
Media Criticizing Parents For Not Vaccinating Children

Media Criticizing Parents For Not Vaccinating Children

Newsy (Jan. 28, 2015) As the Disneyland measles outbreak continues to spread, the media says parents who choose not to vaccinate their children are part of the cause. Video provided by Newsy
Powered by NewsLook.com
Shark Bite Victim Making Amazing Recovery

Shark Bite Victim Making Amazing Recovery

AP (Jan. 27, 2015) A Texas woman who lost more than five pounds of flesh to a shark in the Bahamas earlier this month could be released from a Florida hospital soon. Experts believe she was bitten by a bull shark while snorkeling. (Jan. 27) 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:

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