Featured Research

from universities, journals, and other organizations

One species of pathogen can produce two distinct biofilms

Date:
August 3, 2011
Source:
Public Library of Science
Summary:
Many medical devices, ranging from artificial hip joints to dentures and catheters, can come with unwelcome guests -- complex communities of microbial pathogens called biofilms that are resistant to the human immune system and antibiotics, thus proving a serious threat to human health. However, researchers may have a new way of looking at biofilms, thanks to a new study.

Many medical devices, ranging from artificial hip joints to dentures and catheters, can come with unwelcome guests -- complex communities of microbial pathogens called biofilms that are resistant to the human immune system and antibiotics, thus proving a serious threat to human health. However, researchers may have a new way of looking at biofilms, thanks to a study conducted by University of Iowa biologist David Soll and his colleagues published in the Aug 2 issue of the online, open access journal PLoS Biology.

Previously, researchers believed that each pathogen formed one kind of biofilm, but Soll and his colleagues have discovered that the pernicious fungal pathogen Candida albicans makes two kinds of biofilms; a traditional pathogenic one, and a second sexual one. This discovery provides new and profound insights into developing new therapies that target pathogenic biofilms for disruption.

Soll and his colleagues showed for the first time that the majority -- about 90 percent -- of cells colonizing humans make a pathogenic biofilm that cannot be penetrated by antifungal agents, antibodies or white blood cells. These majority cells are sexually incompetent. But a minority -- about 10 percent -- of cells, which are sexually competent, form highly permeable and penetrable biofilms, which Soll and his colleagues have shown act as a supportive environment for mating. They demonstrate that although the pathogenic and sexual biofilms appear macroscopically similar, they are regulated by entirely different signalling pathways.

"Having two outwardly similar, but functionally different, biofilms provides us with one means of finding out what makes the pathogenic biofilm resistant to all challenges, and the sexual biofilm non-resistant," Soll said. "Whatever that difference is will represent a major target for future drug discovery."


Story Source:

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


Journal Reference:

  1. Song Yi, Nidhi Sahni, Karla J. Daniels, Kevin L. Lu, Thyagarajan Srikantha, Guanghua Huang, Adam M. Garnaas, David R. Soll. Alternative Mating Type Configurations (a/α versus a/a or α/α) of Candida albicans Result in Alternative Biofilms Regulated by Different Pathways. PLoS Biology, 2011; 9 (8): e1001117 DOI: 10.1371/journal.pbio.1001117

Cite This Page:

Public Library of Science. "One species of pathogen can produce two distinct biofilms." ScienceDaily. ScienceDaily, 3 August 2011. <www.sciencedaily.com/releases/2011/08/110802180818.htm>.
Public Library of Science. (2011, August 3). One species of pathogen can produce two distinct biofilms. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2011/08/110802180818.htm
Public Library of Science. "One species of pathogen can produce two distinct biofilms." ScienceDaily. www.sciencedaily.com/releases/2011/08/110802180818.htm (accessed July 29, 2014).

Share This




More Plants & Animals 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
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
Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Newsy (July 28, 2014) The asteroid that killed the dinosaurs struck at the worst time for them. A new study says that if it hit earlier or later, they might've survived. Video provided by Newsy
Powered by NewsLook.com
Raw: Sea Turtle Hatchlings Emerge from Nest

Raw: Sea Turtle Hatchlings Emerge from Nest

AP (July 27, 2014) A live-streaming webcam catches loggerhead sea turtle hatchlings emerging from a nest in the Florida Keys. (July 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:
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