I like this link... it answers a lot about the VX-770 and VX-809 drugs & trials.
<a target=_blank class=ftalternatingbarlinklarge href="http://www.cff.org/research/ClinicalResearch/FAQs/VX-770/index.cfm?dspPrintReady=Y
">http://www.cff.org/research/Cl...x.cfm?dspPrintReady=Y
</a>
If you don't feel like reading, the G551D mutation allows the CFTR protein to get to the cell surface, but not function correctly. VX-770 increases the function of the protein that is already there. The D508 mutation is a little more complicated b/c they don't think much of the protein gets to the cell surface. I will hopefully be participating in the VX-770 trial for dd508 in a few weeks. They will then see if the VX-770 does any good for dd508-ers.
Vertex is developing a 2nd compound VX-809. This compound (I think in phase 2 trials) will help to increase the concentration of proteins on the cell surface. If that works, they'll be able to use VX-770 to get it working correctly.
At least, that is my layman's understanding. It seems like G551D was a bit of an easier goal... so if they can get that to work, they'll try for the more complicated stuff <img src="i/expressions/face-icon-small-wink.gif" border="0">
Thanks, Lauren!... for posting & participating!!