Featured Research

from universities, journals, and other organizations

Hormone-sniffing Bacteria: Engineered E. Coli May Lead To New Drugs, Detect Pollutants

Date:
July 20, 2007
Source:
Princeton University
Summary:
Bacteria that respond to human hormones -- the body's chemical messengers -- may enable the discovery of new treatments for hormone-related medical problems, including thyroid disease and some forms of breast cancer. Developed by Princeton chemical engineers, the sensitive bugs also may detect hormone-mimicking pollutants, which can disrupt normal processes in the body.

Bacteria that respond to human hormones -- the body's chemical messengers -- may enable the discovery of new treatments for hormone-related medical problems, including thyroid disease and some forms of breast cancer. Developed by Princeton chemical engineers, the sensitive bugs also may detect hormone-mimicking pollutants, which can disrupt normal processes in the body.

Related Articles


Hormones must be present in specific amounts to maintain health. For example, sufficient levels of the hormone estrogen are necessary for bone formation and reproduction, but too much of it has been implicated in premature puberty as well as the development of breast cancer and heart disease. The Princeton engineers hope that the bacteria can shed light on the way hormone-like compounds affect the body and eventually guide the development of drugs that can regulate hormone levels.

David Wood, an assistant professor of chemical engineering at Princeton, and Georgios Skretas, who earned his Ph.D. at Princeton in 2006 and is now at the University of Texas-Austin, designed the bacteria by linking the proteins that bind to estrogen, called estrogen receptors, with a protein required for growth in E. coli. This design allows the researchers to distinguish between compounds that stimulate the receptors and those that block them simply by observing bacterial cell growth. Since the bacteria respond quickly -- results are typically seen in about 15 hours under simple growth conditions -- they should be able to rapidly screen thousands of compounds that affect estrogen's activity, making an important contribution to the drug discovery process, Wood said.

When used to screen a small library of potential antioxidants, the bacteria identified two novel estrogen-mimicking compounds. Based upon bacterial growth in the presence of the mimics, the researchers predicted that one of the compounds would behave like estrogen in human cells, while the other would inhibit estrogen-related activity. The researchers confirmed their predictions with subsequent tests in human cells.

Although neither of the compounds turned out to be potent enough to make a good drug, the fact that the bacteria responded appropriately to the substances has made the researchers optimistic.

'Though these compounds themselves aren't likely to have pharmaceutical applications, the results prove that the system can work for drug-like compounds," Wood said. "Our system is also very good at detecting weakly binding substances, which is essential for the identification of hormone-like pollutants, which are found in many substances, including plastics and cosmetics."

In future work, the researchers plan to design bacteria that detect and respond to additional hormone-like compounds, including those that mimic or block the activity of testosterone, the stress hormone cortisol and thyroid hormone. This may advance the search for a nonsurgical treatment for Graves' disease, which is caused by the overabundance of thyroid hormone.

The findings were published online June 15 in the Journal of the American Chemical Society. The work was funded by the National Science Foundation and the Hellenic Secretariat for Research and Technology, and was completed in collaboration with researchers at the National Hellenic Research Foundation in Athens, Greece.


Story Source:

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


Cite This Page:

Princeton University. "Hormone-sniffing Bacteria: Engineered E. Coli May Lead To New Drugs, Detect Pollutants." ScienceDaily. ScienceDaily, 20 July 2007. <www.sciencedaily.com/releases/2007/07/070718163719.htm>.
Princeton University. (2007, July 20). Hormone-sniffing Bacteria: Engineered E. Coli May Lead To New Drugs, Detect Pollutants. ScienceDaily. Retrieved November 21, 2014 from www.sciencedaily.com/releases/2007/07/070718163719.htm
Princeton University. "Hormone-sniffing Bacteria: Engineered E. Coli May Lead To New Drugs, Detect Pollutants." ScienceDaily. www.sciencedaily.com/releases/2007/07/070718163719.htm (accessed November 21, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, November 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

WFP: Ebola Risks Heightened Among Women Throughout Africa

WFP: Ebola Risks Heightened Among Women Throughout Africa

AFP (Nov. 21, 2014) Having children has always been a frightening prospect in Sierra Leone, the world's most dangerous place to give birth, but Ebola has presented an alarming new threat for expectant mothers. Duration: 00:37 Video provided by AFP
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Milestone Birthdays Can Bring Existential Crisis, Study Says

Milestone Birthdays Can Bring Existential Crisis, Study Says

Newsy (Nov. 21, 2014) Researchers find that as people approach new decades in their lives they make bigger life decisions. Video provided by Newsy
Powered by NewsLook.com
Ebola: Life Without School in Guinea

Ebola: Life Without School in Guinea

AFP (Nov. 21, 2014) Following the closure of schools and universities in Guinea because of the Ebola virus, students look for temporary work or gather in makeshift classrooms to catch up on their syllabus. Duration: 02:14 Video provided by AFP
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