Naked Science Forum

Life Sciences => Physiology & Medicine => Topic started by: Harpreet Singh on 20/11/2008 15:03:10

Title: How is PTC 124 proposed to help cyctic fibrosis?
Post by: Harpreet Singh on 20/11/2008 15:03:10

Harpreet Singh  asked the Naked Scientists:
Hi chris

i love ur show. (http://www.thenakedscientists.com/HTML/podcasts/)
 
I would like to have information about PTC 124-a drug proposed for curing cystic fibrosis and duchenne's muscular dystrophy?
 
thanks.

What do you think?

Title: How is PTC 124 proposed to help cyctic fibrosis?
Post by: Seany on 05/01/2009 23:09:47

Quote

PTC124 is a small molecule drug that is being investigated initially as a treatment for cystic fibrosis and Duchenne muscular dystrophy, with the potential to treat a number of other genetic disorders.  In preclinical studies, PTC124 exhibited substantial oral bioavailability, demonstrated significant activity, and was well tolerated at dose levels much higher than those required to show activity.

PTC124 is a novel, orally administered drug that targets nonsense mutations.  Nonsense mutations are single-point alterations in the DNA that prematurely halt the translation process so that a functional protein is not produced.  PTC124 has demonstrated the ability to restore full-length functional protein in genetic disease models harboring nonsense mutations.  Approximately 15% of the cases of Duchenne muscular dystrophy and 10% of the cases of cystic fibrosis are due to nonsense mutations.  PTC has catalogued over 1,800 distinct genetic disorders where nonsense mutations are the cause of the disease in an appreciable percentage of patients.

I am guessing that it stops this nonsense mutation!!
I understand that Cystic fibrosis is caused by 2 alleles, one from the father, one from the mother. The Cystic Fibrosis allele is a recessive one, so it needs both parents....
I have no more knowledge of CF [:P]
Hope you get some help here!