Early treatment with alglucosidase alpha prolongs long-term survival of infants with Pompe disease.
In a previous 52-wk trial, treatment with alglucosidase alpha markedly improved cardiomyopathy, ventilatory function, and overall survival among 18 children <7 mo old with infantile-onset Pompe disease. Sixteen of the 18 patients enrolled in an extension study, where they continued to receive alglucosidase alpha at either 20 mg/kg biweekly (n = 8) or 40 mg/kg biweekly (n = 8), for up to a total of 3 y. These children continued to exhibit the benefits of alglucosidase alpha at the age of 36 mo. Cox regression analyses showed that over the entire study period, alglucosidase alpha treatment reduced the risk of death by 95%, reduced the risk of invasive ventilation or death by 91%, and reduced the risk of any type of ventilation or death by 87%, compared with an untreated historical control group. Cardiomyopathy continued to improve and 11 patients learned and sustained substantial motor skills. No significant differences in either safety or efficacy parameters were observed between the 20 and 40 mg/kg biweekly doses. Overall, long-term alglucosidase alpha treatment markedly extended survival as well as ventilation-free survival and improved cardiomyopathy.
Kishnani
Priya S
PS
Department of Pediatrics, Duke University Medical Center, Durham, North Carolina 27710, USA. kishn001@mc.duke.edu
Corzo
Deya
D
Leslie
Nancy D
ND
Gruskin
Daniel
D
Van der Ploeg
Ans
A
Clancy
John P
JP
Parini
Rosella
R
Morin
Gilles
G
Beck
Michael
M
Bauer
Mislen S
MS
Jokic
Mikael
M
Tsai
Chen-En
CE
Tsai
Brian W H
BW
Morgan
Claire
C
O'Meara
Tara
T
Richards
Susan
S
Tsao
Elisa C
EC
Mandel
Hanna
H
D002648:Child; D002675:Child, Preschool; D006009:Glycogen Storage Disease Type II / Q000188:drug therapy / Q000401:mortality; D006801:Humans; D007223:Infant; D053208:Kaplan-Meier Estimate; D012307:Risk Factors; D015996:Survival Rate; D016896:Treatment Outcome; D000520:alpha-Glucosidases / Q000627:therapeutic use*
C509951:GAA protein, human; D000520:alpha-Glucosidases