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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Hum+Genet
2014 ; 95
(6
): 736-43
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
MFAP5 loss-of-function mutations underscore the involvement of matrix alteration
in the pathogenesis of familial thoracic aortic aneurysms and dissections
#MMPMID25434006
Barbier M
; Gross MS
; Aubart M
; Hanna N
; Kessler K
; Guo DC
; Tosolini L
; Ho-Tin-Noe B
; Regalado E
; Varret M
; Abifadel M
; Milleron O
; Odent S
; Dupuis-Girod S
; Faivre L
; Edouard T
; Dulac Y
; Busa T
; Gouya L
; Milewicz DM
; Jondeau G
; Boileau C
Am J Hum Genet
2014[Dec]; 95
(6
): 736-43
PMID25434006
show ga
Thoracic aortic aneurysm and dissection (TAAD) is an autosomal-dominant disorder
with major life-threatening complications. The disease displays great genetic
heterogeneity with some forms allelic to Marfan and Loeys-Dietz syndrome, and an
important number of cases still remain unexplained at the molecular level.
Through whole-exome sequencing of affected members in a large TAAD-affected
family, we identified the c.472C>T (p.Arg158(?)) nonsense mutation in MFAP5
encoding the extracellular matrix component MAGP-2. This protein interacts with
elastin fibers and the microfibrillar network. Mutation screening of 403
additional probands identified an additional missense mutation of MFAP5 (c.62G>T
[p.Trp21Leu]) segregating with the disease in a second family. Functional
analyses performed on both affected individual's cells and in vitro models showed
that these two mutations caused pure or partial haploinsufficiency. Thus,
alteration of MAGP-2, a component of microfibrils and elastic fibers, appears as
an initiating mechanism of inherited TAAD.