Navigation Links
New compound holds promise for treating Duchenne MD, other inherited diseases
Date:6/27/2012

Scientists at UCLA have identified a new compound that could treat certain types of genetic disorders in muscles. It is a big first step in what they hope will lead to human clinical trials for Duchenne muscular dystrophy.

Duchenne muscular dystrophy, or DMD, is a degenerative muscle disease that affects boys almost exclusively. It involves the progressive degeneration of voluntary and cardiac muscles, severely limiting the life span of sufferers.

In a new study, senior author Carmen Bertoni, an assistant professor in the UCLA Department of Neurology, first author Refik Kayali, a postgraduate fellow in Bertoni's lab, and their colleagues demonstrate the efficacy of a new compound known as RTC13, which suppresses so-called "nonsense" mutations in a mouse model of DMD.

The findings appear in the current online edition of the journal Human Molecular Genetics.

"We are excited about these new findings because they represent a major step toward the development of a drug that could potentially treat this devastating disease in humans," Bertoni said. "We knew that the compounds were effective in cells isolated from the mouse model for DMD, but we did not know how they would behave when administered in a living organism."

Nonsense mutations are generally caused by a single change in DNA that disrupts the normal cascade of events that changes a gene into messenger RNA, then into a protein. The result is a non-functioning protein. Approximately 13 percent of genetic defects known to cause diseases are due to such mutations. In the case of DMD, the "missing" protein is called dystrophin.

For the study, Bertoni and Kayali collaborated with the laboratory of Dr. Richard Gatti, a professor of pathology and laboratory medicine and of human genetics at UCLA. Working with the UCLA Molecular Shared Screening Resource facility at the campus's California NanoSystems Institute, the Gatti lab screened some 35,000 small molecules in the search for new compounds that could ignore nonsense mutations. Two were identified as promising candidates: RTC13 and RTC14.

The Bertoni lab tested RTC13 and RTC14 in a mouse model of DMD carrying a nonsense mutation in the dystrophin gene. While RTC14 was not found to be effective, RTC13 was able to restore significant amounts of dystrophin protein, making the compound a promising drug candidate for DMD. When RTC13 was administered to mice for five weeks, the investigators found that the compound partially restored full-length dystrophin, which resulted in a significant improvement in muscle strength. The loss of muscle strength is a hallmark of DMD.

The researchers also compared the level of dystrophin achieved to the levels seen with another experimental compound, PTC124, which has proved disappointing in clinical trials; RTC13 was found to be more effective in promoting dystrophin expression. Just as important, Bertoni noted, the study found that RTC13 was well tolerated in animals, which suggests it may also be safe to use in humans.

The next step in the research is to test whether an oral formulation of the compound would be effective in achieving therapeutically relevant amounts of dystrophin protein. If so, planning can then begin for clinical testing in patients and for expanding these studies to other diseases that may benefit from this new drug.


'/>"/>

Contact: Mark Wheeler
mwheeler@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
Source:Eurekalert

Related biology news :

1. Nonstoichiometric Compounds V - An ECI Conference Series
2. New drug-screening method yields long-sought anti-HIV compounds
3. Dont feel like exercise? Scientists find compound that may help you work out harder
4. Nuisance seaweed found to produce compounds with biomedical potential
5. Like curry? New biological role identified for compound used in ancient medicine
6. Heparin-like compounds inhibit breast cancer metastasis to bone
7. Sulphur and iron compounds common in old shipwrecks
8. New screening technique yields elusive compounds to block immune-regulating enzyme
9. Biosensor illuminates compounds to aid fight against TB
10. Canadian girl, 16, invents disease-fighting, anti-aging compound using tree particles
11. Remote Siberian lake holds clues to Arctic -- and Antarctic -- climate change
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/16/2016)... , May 16, 2016   EyeLock LLC , ... announced the opening of an IoT Center of Excellence ... and expand the development of embedded iris biometric applications. ... level of convenience and security with unmatched biometric accuracy, ... identity aside from DNA. EyeLock,s platform uses video technology ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a ... the MegaMatcher Automated Biometric Identification System (ABIS) ... large-scale multi-biometric projects. MegaMatcher ABIS can process multiple ... using any combination of fingerprint, face or iris ... MegaMatcher SDK and MegaMatcher Accelerator , ...
(Date:4/26/2016)... LONDON , April 26, 2016 ... EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... a partnership to integrate the Onegini mobile security ... (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The ... enhanced security to access and transact across channels. ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... (PRWEB) , ... June 27, 2016 , ... Parallel ... clinical trials, announced today the Clinical Reach Virtual Patient Encounter CONSULT module ... circle with the physician and clinical trial team. , Using the CONSULT module, patients ...
(Date:6/27/2016)... -- Liquid Biotech USA , Inc. ... Research Agreement with The University of Pennsylvania ("PENN") ... patients.  The funding will be used to assess ... outcomes in cancer patients undergoing a variety of ... to support the design of a therapeutic, decision-making ...
(Date:6/24/2016)... , June 24, 2016 Epic ... sensitively detects cancers susceptible to PARP inhibitors by ... tumor cells (CTCs). The new test has already ... therapeutics in multiple cancer types. Over ... DNA damage response pathways, including PARP, ATM, ATR, ...
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, a leader in ... Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical research professionals, Mosio ... practical tips, tools, and strategies for clinical researchers. , “The landscape of how ...
Breaking Biology Technology: