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2017 ; 40
(2
): 281-289
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Angiotensin receptor blockade mediated amelioration of mucopolysaccharidosis type
I cardiac and craniofacial pathology
#MMPMID27743312
Osborn MJ
; Webber BR
; McElmurry RT
; Rudser KD
; DeFeo AP
; Muradian M
; Petryk A
; Hallgrimsson B
; Blazar BR
; Tolar J
; Braunlin EA
J Inherit Metab Dis
2017[Mar]; 40
(2
): 281-289
PMID27743312
show ga
Mucopolysaccharidosis type I (MPS IH) is a lysosomal storage disease (LSD) caused
by inactivating mutations to the alpha-L-iduronidase (IDUA) gene. Treatment
focuses on IDUA enzyme replacement and currently employed methods can be
non-uniform in their efficacy particularly for the cardiac and craniofacial
pathology. Therefore, we undertook efforts to better define the pathological
cascade accounting for treatment refractory manifestations and demonstrate a role
for the renin angiotensin system (RAS) using the IDUA(-/-) mouse model.
Perturbation of the RAS in the aorta was more profound in male animals suggesting
a causative role in the observed gender dimorphism and angiotensin receptor
blockade (ARB) resulted in improved cardiac function. Further, we show the
ability of losartan to prevent shortening of the snout, a common craniofacial
anomaly in IDUA(-/-) mice. These data show a key role for the RAS in MPS
associated pathology and support the inclusion of losartan as an augmentation to
current therapies.