Featured Research

from universities, journals, and other organizations

New bitter blocker discovered

Date:
June 3, 2011
Source:
Monell Chemical Senses Center
Summary:
Bitter taste often causes rejection that can interfere with food selection, nutrition and therapeutic compliance. This is especially true for children. Now, scientists have discovered a compound that inhibits bitterness by acting directly on a subset of bitter taste receptors.

Although bitterness can sometimes be desirable -- such as in the taste of coffee or chocolate -- more often bitter taste causes rejection that can interfere with food selection, nutrition and therapeutic compliance. This is especially true for children. Now, scientists from the Monell Center and Integral Molecular describe the discovery of a compound that inhibits bitterness by acting directly on a subset of bitter taste receptors.

Related Articles


"Bitter taste is a major problem for pediatric drug compliance and also for proper nutrition, such as eating those healthy but bitter green vegetables," said Monell senior author Paul Breslin, Ph.D., a sensory biologist. "But we currently have very limited ways to effectively control bitter taste."

Bitterness is detected by a family of approximately 25 different taste receptors called TAS2Rs. Together, the TAS2Rs respond to a broad array of structurally different compounds, many of which are found in nature and can be toxic.

Discovery of bitter blockers would help scientists understand the signaling mechanisms of these receptors and promote the design of novel and more effective blockers.

Monell and Integral Molecular are collaborating on a large project to understand the structure and function of TAS2Rs. In a serendipitous discovery, the researchers found that probenecid, a molecule frequently used in receptor assays, is an inhibitor of a subset of bitter taste receptors. Probenecid also is an FDA-approved therapeutic for gout.

In the study, published in PLoS ONE, a series of in vitro studies revealed that probenecid does not physically block interaction of bitter molecules with the receptor's primary binding site. Rather, it appears to bind elsewhere on the receptor to modulate the receptor's ability to interact with the bitter molecule.

"Probenecid's mechanism of action makes it a useful tool for understanding how bitter receptors function," said Integral Molecular senior author Joseph B. Rucker, Ph.D. "This knowledge will help us develop more potent bitter taste inhibitors."

A series of human sensory studies established that probenecid robustly inhibited the bitter taste of salicin, a compound that stimulates one of the target receptors.

"This demonstrates how we can take in vitro experiments and go on to show how they make a difference functionally and perceptually," said Breslin.

Additional studies will continue to explore the structure and function of TAS2Rs. The overall goal is to identify the regions of the receptors that contribute to bitter molecule binding and how binding events lead to signaling events within the cell.

Understanding modulation of bitter receptor function may have additional implications for the respiratory and gastrointestinal systems, as bitter taste receptors also are expressed in the nose, the lungs and the intestines.

Also contributing to the research were first author Tiffani A. Greene, Anu Thomas, Eli Berdougo, and Benjamin J. Doranz of Integral Molecular, and Suzanne Alarcon of Rutgers University School of Environmental and Biological Sciences. Dr. Breslin is also faculty at Rutgers University School of Environmental and Biological Sciences. The research was funded by the National Institute on Deafness and Other Communication Disorders.


Story Source:

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


Journal Reference:

  1. Tiffani A. Greene, Suzanne Alarcon, Anu Thomas, Eli Berdougo, Benjamin J. Doranz, Paul A. S. Breslin, Joseph B. Rucker. Probenecid Inhibits the Human Bitter Taste Receptor TAS2R16 and Suppresses Bitter Perception of Salicin. PLoS ONE, 2011; 6 (5): e20123 DOI: 10.1371/journal.pone.0020123

Cite This Page:

Monell Chemical Senses Center. "New bitter blocker discovered." ScienceDaily. ScienceDaily, 3 June 2011. <www.sciencedaily.com/releases/2011/06/110602122351.htm>.
Monell Chemical Senses Center. (2011, June 3). New bitter blocker discovered. ScienceDaily. Retrieved December 21, 2014 from www.sciencedaily.com/releases/2011/06/110602122351.htm
Monell Chemical Senses Center. "New bitter blocker discovered." ScienceDaily. www.sciencedaily.com/releases/2011/06/110602122351.htm (accessed December 21, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, December 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Best Tips to Curb Holiday Carbs

The Best Tips to Curb Holiday Carbs

Buzz60 (Dec. 19, 2014) It's hard to resist those delicious but fattening carbs we all crave during the winter months, but there are some ways to stay satisfied without consuming the extra calories. Vanessa Freeman (@VanessaFreeTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Sierra Leone Bikers Spread the Message to Fight Ebola

Sierra Leone Bikers Spread the Message to Fight Ebola

AFP (Dec. 19, 2014) More than 100 motorcyclists hit the road to spread awareness messages about Ebola. Nearly 7,000 people have now died from the virus, almost all of them in west Africa, according to the World Health Organization. Video provided by AFP
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
The Best Protein-Filled Foods to Energize You for the New Year

The Best Protein-Filled Foods to Energize You for the New Year

Buzz60 (Dec. 19, 2014) The new year is coming and nothing will energize you more for 2015 than protein-filled foods. Fitness and nutrition expert John Basedow (@JohnBasedow) gives his favorite high protein foods that will help you build muscle, lose fat and have endless energy. Video provided by Buzz60
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