The
European Commission (EC) has approved the expansion of orphan drug
Kalydeco (ivacaftor) indications, for carrying the cystic fibrosis
transmembrane conductance regulator (CFTR) 9 种 gated one mutation
(G551D, G1244E, G1349D, G178R, G551S,
S1251N, S1255P, S549N, S549R) of 2-5-year-old cystic fibrosis (CF) in
pediatric patients, as well as carrying the R117H mutation of 18 years
and older adult CF patients. Previously, Kalydeco been approved for the EU to carry nine kinds gated one mutation in CF patients 6 years and older. In
Europe, about 125 cases of children 2-5 years old CF patients carry
mutations in one of the gated above nine kinds, about 350 cases of adult
CF patients carrying the R117H mutation. It is worth mentioning that, Kalydeco quite expensive, priced up to $
300,000 / person / year, which means that the approval of this expanded
indication, will add nearly $ 140 million in revenue annually Vertex.
Kalydeco
expand pediatric indication is based on an open-label Phase III
clinical trials 24 weeks, the study looked at the weight-based dosing
regimens new formula safe for children 2-5 years old patients (50mg or
75mg twice daily) and pharmacokinetics. To
meet this age group needs of pediatric patients, Vertex has developed a
new weight-based Kalydeco oral granular formulations (50mg and 75mg),
patients may be unable to swallow tablets, the drug can be mixed with
food or liquid to medicine. Kalydeco expand adult indication is based on positive data from a
Phase III study in 69 cases carrying the R117H mutation in adult CF
patients conducted.
In
many countries, Kalydeco were granted orphan drug status, the drug is the first targeted therapy for cystic fibrosis (CF) the underlying cause, can make the patient the defective CFTR protein function
properly, the drug in 2012 It
was first eligible for FDA and EU approval for the treatment of CFTR
gene has at least one copy of the G551D mutation in 6 years and older
with cystic fibrosis (CF) patients. After, Kalydeco indications continue to be expanded, but also for the Vertex company a big moneymaker.
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