Navigation Links
Pitt team finds mechanism that causes noise-induced tinnitus and drug that can prevent it
Date:5/27/2013

exposed mice. Dr. Tzounopoulos and his team tested whether an FDA-approved epilepsy drug called retigabine, which specifically enhances KCNQ channel activity, could prevent the development of tinnitus. Thirty minutes into the noise exposure and twice daily for the next five days, half of the exposed group was given injections of retigabine.

Seven days after noise exposure, the team determined whether the mice had developed tinnitus by conducting startle experiments, in which a continuous, 70 dB tone is played for a period, then stopped briefly and then resumed before being interrupted with a much louder pulse. Mice with normal hearing perceive the gap in sounds and are aware something had changed, so they are less startled by the loud pulse than mice with tinnitus, which hear phantom noise that masks the moment of silence in between the background tones.

The researchers found that mice that were treated with retigabine immediately after noise exposure did not develop tinnitus. Consistent with previous studies, 50 percent of noise-exposed mice that were not treated with the drug exhibited behavioral signs of the condition.

"This is an important finding that links the biophysical properties of a potassium channel with the perception of a phantom sound," Dr. Tzounopoulos said. "Tinnitus is a channelopathy, and these KCNQ channels represent a novel target for developing drugs that block the induction of tinnitus in humans."

The KCNQ family is comprised of five different subunits, four of which are sensitive to retigabine. He and his collaborators aim to develop a drug that is specific for the two KCNQ subunits involved in tinnitus to minimize the potential for side effects.

"Such a medication could be a very helpful preventive strategy for soldiers and other people who work in situations where exposure to very loud noise is likely," Dr. Tzounopoulos said. "It might also be useful for other conditions of phantom perceptions, such as pain in a limb
'/>"/>

Contact: Anita Srikameswaran
SrikamAV@upmc.edu
412-578-9193
University of Pittsburgh Schools of the Health Sciences
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. MIT research: Study finds room to store CO2 underground
2. Study finds circle hooks lower catch rate for offshore anglers
3. LSUHSC research finds HPV-related head & neck cancers rising, highest in middle-aged white men
4. Head and body lice appear to be the same species, genetic study finds
5. Study finds peoples niceness may reside in their genes
6. Large international study finds memory in adults impacted by versions of 4 genes
7. Improved loblolly pines better for the environment, study finds
8. NIST/UMass study finds evidence nanoparticles may increase plant DNA damage
9. As deadly cat disease spreads nationally, MU veterinarian finds effective treatment
10. Study finds cancer-fighting goodness in cholesterol
11. Study finds soda consumption increases overall stroke risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/30/2014)... Salk professor and Howard Hughes Medical Institute investigator, ... named recipients in the 2014 round of grants ... the BRAIN (Brain Research through Advancing Innovative Neurotechnologies) ... announced September 30, provides more than $3 million ... years. , The BRAIN Initiative, launched last year, ...
(Date:9/30/2014)... water may increase the risk of stillbirth and ... by a Boston University School of Public Health ... Environmental Health , compared 1,091 PCE-exposed pregnancies ... Cape Cod, Ma., where water was contaminated in ... the installation of vinyl-lined asbestos cement pipes. PCE ...
(Date:9/30/2014)... live in almost any aquatic environment on Earth, but ... species are pushed to the limit. The amount of ... critical for how different species cope in the future, ... of Gothenburg, published in the scientific journal Proceedings ... continues apace thanks to increasing levels of greenhouse gases ...
Breaking Biology News(10 mins):Salk scientists receive $3 million for BRAIN Initiative grant 2Contaminated water linked to pregnancy complications, BU study finds 2Shape up quickly -- applies to fish, too! 2
... in ecological or environmental conservation remains contentious the ... demand that governments regulate and encourage restoration projects; ... corporations makes such interventions politically difficult. However, ... a handful of developing nations, alongside South Africa, ...
... , RIVERSIDE, Calif. Alan McHughen , a ... University of California, Riverside, has been chosen by the ... Sciences to receive a 2011-2012 Jefferson Science Fellowship ... selected for the fellowships this year. Successful ...
... is redefining the rules by which we live and at ... level, several areas of the globe are in danger of ... and maybe, one day, live in floating houses. Depending ... others in their adjustment to the effects of global warming, ...
Cached Biology News:UC Riverside plant biotechnologist receives prestigious Jefferson Science Fellowship 2UC Riverside plant biotechnologist receives prestigious Jefferson Science Fellowship 3Floating houses 2Floating houses 3
(Date:9/30/2014)... , September 30, 2014 ... intuitive browsing of chemistry in documents ... software solutions and consulting services for life science ... information and generate Markush structures from documents. ... organizations intellectual property, however generating and understanding Markush ...
(Date:9/30/2014)... Sept. 30, 2014 FemCap Inc., www.femcap.com ... its receipt of a patent No: US, 8,795,248 B2 ... also received FDA clearance in the U.S., 510(K) K121857, ... in Europe. This patent is related to its menstrual cup ... the company is releasing FemmyCycle Teen, a third menstrual ...
(Date:9/30/2014)... SoundConnect, an award ... dedicated to supporting business communication solutions, including business ... a carrier services specialist has joined ... connected and productive at all times. This growth ... businesses to cloud communications services. On a ...
(Date:9/30/2014)... Back in the 1970’s, many companies calculated their ... which included space for circulation and file storage. “It ... at Nidea Corporate Real Estate / ITRA Global , ... 2000, however, 250 square feet per employee became the ... to 175 to 225 square feet, and over the next ...
Breaking Biology Technology:ChemAxon Introduces ChemCurator for Chemical Information Extraction and Markush Structure Creation 2The FemmyCycle 2SoundConnect Expands Carrier Services Division 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 3
... , ... , , , Antibodies ... arrays) or as biopharmaceutical therapeutics. In,all cases the successful production ... criteria include: protein identification,quantitation and the monitoring of purity and ...
... , ... , , , ... of the Agilent 2100 bioanalyzer in combination,with the Protein 200 Plus ... denaturing gel-elctrophoresis (SDSPAGE).,The results showed that the Agilent 2100 bioanalyzer provides,fast ...
... , ... , , , , ... an siRNA sequence,for a target gene, which are of,high importance ... crucial.,An efficient method to optimize,transfection and gene silencing,is critical for ...
Cached Biology Technology:Quality control of antibodies using the,2100 bioanalyzer and the Protein 200,Plus assay 2Quality control of antibodies using the,2100 bioanalyzer and the Protein 200,Plus assay 3Comparison of different protein,quantitation methods 2Comparison of different protein,quantitation methods 3Comparison of different protein,quantitation methods 4Comparison of different protein,quantitation methods 5Comparison of different protein,quantitation methods 6Comparison of different protein,quantitation methods 7Comparison of different protein,quantitation methods 8Comparison of different protein,quantitation methods 9Confirming gene silencing,mechanism by pGFP/GFP22 ,siRNA co-transfection 2Confirming gene silencing,mechanism by pGFP/GFP22 ,siRNA co-transfection 3Confirming gene silencing,mechanism by pGFP/GFP22 ,siRNA co-transfection 4