Navigation Links
Class of antibiotics can enhance gene-silencing tool
Date:7/20/2008

A way to turn off one gene at a time has earned acceptance in biology laboratories over the last decade. Doctors envision the technique, called RNA interference, as a tool to treat a variety of diseases if it can be adapted to humans.

Emory University researchers have discovered that antibiotics known as fluoroquinolones can make RNA interference more effective in the laboratory and reduce potential side effects. The results will be published online this week in the journal Nature Biotechnology.

"The surprising aspect is that some fluoroquinolones have this previously unrecognized property," says senior author Peng Jin, PhD, assistant professor of human genetics at Emory University School of Medicine. "The good part is that doctors have years of experience treating bacterial infections with them, so they are generally considered safe."

The most powerful enhancer of RNA interference was enoxacin, which has been used to treat gonorrhea and urinary tract infections. The group of compounds also includes the widely used antibiotic ciprofloxacin. The antibiotics' effect on RNA interference appears to be chemically separate from their bacteria-killing activities.

Significant barriers still prevent RNA interference from working well in people, Jin says.

"The barriers include specificity and toxicity, as well as getting the RNA to the right place in the body," he says. "If we can enhance how potent a given amount of RNA is and reduce dosage, we're tackling both specificity and toxicity."

Some studies have found that side effects come from the amount of RNA injected, which can trigger an anti-viral response, rather than from the genetic sequence of the RNA used.

Andrew Fire and Craig Mello received the 2006 Nobel Prize in Medicine for their discovery that short pieces of RNA, when introduced into cells, can silence a stretch of genetic code. Artificially introduced RNA hijacks machinery inside the cell called the RNA-induced silencing complex or RISC.

To probe how RISC works, Jin and his co-workers inserted a gene for a fluorescent protein into a cell line, and then added a short piece of RNA that incompletely silences the inserted gene. That way, if a potential drug tweaked the silencing process, the researchers could see it quickly.

They found that enoxacin can increase how well a gene is silenced by up to a factor of ten in cultured cells and by a factor of three in mice. It appears to strengthen the grip of part of RISC, a protein called TRBP, upon small pieces of RNA.


'/>"/>

Contact: Holly Korschun
hkorsch@emory.edu
404-727-3990
Emory University
Source:Eurekalert

Related biology news :

1. World-class environment vision to bring back the species
2. bioMETRX, Inc. Garage Door Opener Named Best In Class
3. Compound has potential for new class of AIDS drugs
4. Cold Spring Harbor Protocols features classic approaches for analyzing chromosomes
5. Nobel laureate Dr. Linda Buck elected to American Academy of Arts & Sciences 2008 Class of Fellows
6. New computer applications allow to classify Iberian pig meat automatically
7. New edition of a classic molecular biology textbook from CSHL Press and Benjamin Cummings
8. World class in Systems Biology is the aim
9. Identification of a novel class of (not-so) small RNAs
10. New class of drug offers hope to treatment-resistant AIDS patients
11. Freshman class sparks start-up company
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... Annual Report on Form 10-K on Thursday April 13, 2017 with ... ... Relations section of the Company,s website at http://www.nxt-id.com  under "SEC ... . 2016 Year Highlights: Acquisition ...
(Date:4/11/2017)... N.Y. , April 11, 2017 ... fingerprints, but researchers at the New York University ... College of Engineering have found that partial similarities ... security systems used in mobile phones and other ... thought. The vulnerability lies in the ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... to expand at a CAGR of 25.76% during the ... is the primary factor for the growth of the ... https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global stem ... technology, application, and geography. The stem cell market of ...
Breaking Biology News(10 mins):
(Date:9/21/2017)... ... September 21, 2017 , ... Vixiar Medical announced today ... manufacturing functions to The LaunchPort™ Accelerator at the City Garage in Port Covington. ... manufacturing and business services to its Residents. , Vixiar Medical recently closed ...
(Date:9/21/2017)... Colmar (France) , ... (PRWEB) September 21, 2017 ... ... is an international scientific and technical congress to review the latest knowledge on ... panel of prestigious international speakers will discuss the impact of Biostimulants on Plant ...
(Date:9/21/2017)... ... September 21, 2017 , ... ... who enable the world’s most progressive pharma and biotech organizations to do more ... top pharma and biotech events in Q4. , DrugDev will demonstrate DrugDev Spark™, ...
(Date:9/21/2017)... S.C. (PRWEB) , ... September 21, 2017 , ... ... turned bright neon green this month, the response was swift and efficient thanks ... ( RRWQG ). RRWQG is made up of more than 50 stakeholders, including ...
Breaking Biology Technology: