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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 Nephrol+Dial+Transplant
2014 ; 29
(12
): 2235-43
Nephropedia Template TP
gab.com Text
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English Wikipedia
Severe vascular calcification and tumoral calcinosis in a family with
hyperphosphatemia: a fibroblast growth factor 23 mutation identified by exome
sequencing
#MMPMID25378588
Shah A
; Miller CJ
; Nast CC
; Adams MD
; Truitt B
; Tayek JA
; Tong L
; Mehtani P
; Monteon F
; Sedor JR
; Clinkenbeard EL
; White K
; Mehrotra R
; LaPage J
; Dickson P
; Adler SG
; Iyengar SK
Nephrol Dial Transplant
2014[Dec]; 29
(12
): 2235-43
PMID25378588
show ga
BACKGROUND: Tumoral calcinosis is an autosomal recessive disorder characterized
by ectopic calcification and hyperphosphatemia. METHODS: We describe a family
with tumoral calcinosis requiring amputations. The predominant metabolic anomaly
identified in three affected family members was hyperphosphatemia. Biochemical
and phenotypic analysis of 13 kindred members, together with exome analysis of 6
members, was performed. RESULTS: We identified a novel Q67K mutation in
fibroblast growth factor 23 (FGF23), segregating with a null (deletion) allele on
the other FGF23 homologue in three affected members. Affected siblings had high
circulating plasma C-terminal FGF23 levels, but undetectable intact FGF23 or
N-terminal FGF23, leading to loss of FGF23 function. CONCLUSIONS: This suggests
that in human, as in experimental models, severe prolonged hyperphosphatemia may
be sufficient to produce bone differentiation proteins in vascular cells, and
vascular calcification severe enough to require amputation. Genetic modifiers may
contribute to the phenotypic variation within and between families.