Another paper has been published and revealed another potential treatment for myotonic dystrophy, Phenylbutazone PBZ.. Interestingly this study was also done in Japan………… now a hotbed of repositioning drugs for treatment of myotonic dystrophy. some info from the study
“Using the drug repositioning strategy, we found that PBZ markedly elevated MBNL1 expression in myogenic cells(Fig. 1 and Supplementary Fig. S1) as well as in skeletal muscles in HSALR mice model (Fig. 2 and Supplementary Fig. S2). PBZ mitigated muscle pathology (Fig. 2d,e) and improved the running wheel activity and grip strength in HSALR mice (Fig. 2c and Supplementary Fig. S2d).”
This summary above showed that in mice this drug helped mice with myotonic dystrophy run on the wheel better and had better grip strength. More info below
PBZ is an NSAID with anti-inflammatory, antipyretic, and analgesic activities. PBZ was approved in humans for rheumatoid arthritis and gout in 1949. Although incidental adverse effects of fatal liver disease and aplastic anemia markedly lowered the use of PBZ, PBZ is still used as an alternative drug for ankylosing spondylitis32,33.
Interestingly, another NSAID, ketoprofen has been reported to suppress CUG-induced lethality in Drosophila34, and we also found that 50 μ M ketoprofen upregulated the expression of Mbnl1 mRNA 1.2-fold in C2C12 cells, which was lower than the 1.3-fold increase of Mbnl1 mRNA by 50 μ M PBZ (Supplementary Fig. S6). Ketoprofen
and some other NSAIDs may have beneficial effects on a mouse model of DM1, as well as on DM1 patients.
Editors Note: This drug (PBZ) approval was removed for humans in 2003 in the USA and Canada. It is available for use in animals only. The drug Ketoprofen was not studied in depth but is an approved NSAZID drug in the USA. We have choosen the image of Ketoprofen as this is an approved drug in the USA.
In a study published in December 2015 in a peer review journal researchers from Japan and Poland found that a commonly used antibiotic might assist in the treatment of Myotonic Dystrophy. This is a sort of stunning discovery as there is no treatment identified to treat the disease. Treatment now consists of reducing symptoms.
The researchers first began by screening antibiotics. In a screen of 20 antibiotics 2-3 were found to have some potential with the disease.When screening the drugs they first used mice cells and lab equipment to find the most promising compounds (drugs). . Erythromyicin was found to have the highest attraction to the RNA CUG expansion (The opposite of CTG repeats in the DNA) Erythromycin was the drug that the researchers chose to study. Click here for the screening graph Muscleblind and Various antibiotics and compounds
A new article was published from one of the major research centers that researches myotonic dystrophy…. While drug trials are starting very few people this year will be able to access the drug and only 1/2 will get the drug and the other 1/2 will get placebo. Now comes news that a therapeutic agent that is currently available has the theoretical ability to help with myotonic dystophy muscle restoration. While the full article is not available yet here is the abstract from PubMed (below)
A highly promising Compound has formed the basis for a new pharmaceutical company. This company is Called Atricode and is based on compounds that have been researched at University of Southern California to treat and cure Myotonic Dystrophy. Sita Reddy’s Lab has been instrumental in moving these potential treatments (MDI16) for Myotonic Dystrophy. The lab and company has recently been awarded a $90,000 grant through a competitive process. More about the grant:
Atricode is developing treatments for rare diseases. The lead indication, Myotonic Dystrophy Type 1 (DM1,) is a devastating genetic multisystem disorder with no available treatment or cure. This team identified highly potent and selective small molecule leads that rescue DM1 pathology in patient myoblasts and in DM1 mouse models. The team joined forces with experienced entrepreneurs to form a start-up company that moves the drug candidates towards the clinic. The drug candidate could be the first therapy to treat this devastating disorder and the Ideas Empowered funds are critical for the selection of the lead candidate for clinical development and to support fundraising efforts.
The Muscular Dystrophy Association of the USA (MDA) announced its winter research grants. 13.6 million was awarded including two grants for Myotonic Dystrophy research. One grant to doctor Disney will explore the possible therapeutic effects of small molecule approach for DM2. This would be a strong complement to the DM1 research that is ongoing in his lab.
The other grant to Dr. Mockton is to research the effect of Triplet expansion and stability on the likely course of the Myotonic Dystrophy Disease.
MDA is spending 4.6 of its research grant budget this winter on Myotonic Dystrophy Research.