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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 J+Clin+Invest
2017 ; 127
(3
): 942-953
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Sphingosine-1-phosphate lyase mutations cause primary adrenal insufficiency and
steroid-resistant nephrotic syndrome
#MMPMID28165343
Prasad R
; Hadjidemetriou I
; Maharaj A
; Meimaridou E
; Buonocore F
; Saleem M
; Hurcombe J
; Bierzynska A
; Barbagelata E
; Bergadá I
; Cassinelli H
; Das U
; Krone R
; Hacihamdioglu B
; Sari E
; Yesilkaya E
; Storr HL
; Clemente M
; Fernandez-Cancio M
; Camats N
; Ram N
; Achermann JC
; Van Veldhoven PP
; Guasti L
; Braslavsky D
; Guran T
; Metherell LA
J Clin Invest
2017[Mar]; 127
(3
): 942-953
PMID28165343
show ga
Primary adrenal insufficiency is life threatening and can present alone or in
combination with other comorbidities. Here, we have described a primary adrenal
insufficiency syndrome and steroid-resistant nephrotic syndrome caused by
loss-of-function mutations in sphingosine-1-phosphate lyase (SGPL1). SGPL1
executes the final decisive step of the sphingolipid breakdown pathway, mediating
the irreversible cleavage of the lipid-signaling molecule sphingosine-1-phosphate
(S1P). Mutations in other upstream components of the pathway lead to harmful
accumulation of lysosomal sphingolipid species, which are associated with a
series of conditions known as the sphingolipidoses. In this work, we have
identified 4 different homozygous mutations, c.665G>A (p.R222Q),
c.1633_1635delTTC (p.F545del), c.261+1G>A (p.S65Rfs*6), and c.7dupA (p.S3Kfs*11),
in 5 families with the condition. In total, 8 patients were investigated, some of
whom also manifested other features, including ichthyosis, primary
hypothyroidism, neurological symptoms, and cryptorchidism. Sgpl1-/- mice
recapitulated the main characteristics of the human disease with abnormal adrenal
and renal morphology. Sgpl1-/- mice displayed disrupted adrenocortical zonation
and defective expression of steroidogenic enzymes as well as renal histology in
keeping with a glomerular phenotype. In summary, we have identified SGPL1
mutations in humans that perhaps represent a distinct multisystemic disorder of
sphingolipid metabolism.