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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 PLoS+One
2017 ; 12
(3
): e0174274
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
A functional variant in NEPH3 gene confers high risk of renal failure in primary
hematuric glomerulopathies Evidence for predisposition to microalbuminuria in
the general population
#MMPMID28334007
Voskarides K
; Stefanou C
; Pieri M
; Demosthenous P
; Felekkis K
; Arsali M
; Athanasiou Y
; Xydakis D
; Stylianou K
; Daphnis E
; Goulielmos G
; Loizou P
; Savige J
; Höhne M
; Völker LA
; Benzing T
; Maxwell PH
; Gale DP
; Gorski M
; Böger C
; Kollerits B
; Kronenberg F
; Paulweber B
; Zavros M
; Pierides A
; Deltas C
PLoS One
2017[]; 12
(3
): e0174274
PMID28334007
show ga
BACKGROUND: Recent data emphasize that thin basement membrane nephropathy (TBMN)
should not be viewed as a form of benign familial hematuria since chronic renal
failure (CRF) and even end-stage renal disease (ESRD), is a possible development
for a subset of patients on long-term follow-up, through the onset of focal and
segmental glomerulosclerosis (FSGS). We hypothesize that genetic modifiers may
explain this variability of symptoms. METHODS: We looked in silico for
potentially deleterious functional SNPs, using very strict criteria, in all the
genes significantly expressed in the slit diaphragm (SD). Two variants were
genotyped in a cohort of well-studied adult TBMN patients from 19 Greek-Cypriot
families, with a homogeneous genetic background. Patients were categorized as
"Severe" or "Mild", based on the presence or not of proteinuria, CRF and ESRD. A
larger pooled cohort (HEMATURIA) of 524 patients, including IgA nephropathy
patients, was used for verification. Additionally, three large general population
cohorts [Framingham Heart Study (FHS), KORAF4 and SAPHIR] were used to
investigate if the NEPH3-V353M variant has any renal effect in the general
population. RESULTS AND CONCLUSIONS: Genotyping for two high-scored variants in
103 TBMN adult patients with founder mutations who were classified as mildly or
severely affected, pointed to an association with variant NEPH3-V353M (filtrin).
This promising result prompted testing in the larger pooled cohort (HEMATURIA),
indicating an association of the 353M variant with disease severity under the
dominant model (p = 3.0x10-3, OR = 6.64 adjusting for gender/age; allelic
association: p = 4.2x10-3 adjusting for patients' kinships). Subsequently,
genotyping 6,531 subjects of the Framingham Heart Study (FHS) revealed an
association of the homozygous 353M/M genotype with microalbuminuria (p =
1.0x10-3). Two further general population cohorts, KORAF4 and SAPHIR confirmed
the association, and a meta-analysis of all three cohorts (11,258 individuals)
was highly significant (p = 1.3x10-5, OR = 7.46). Functional studies showed that
Neph3 homodimerization and Neph3-Nephrin heterodimerization are disturbed by
variant 353M. Additionally, 353M was associated with differential activation of
the unfolded protein response pathway, when overexpressed in stressed cultured
undifferentiated podocyte cells, thus attesting to its functional significance.
Genetics and functional studies support a "rare variant-strong effect" role for
NEPH3-V353M, by exerting a negative modifier effect on primary glomerular
hematuria. Additionally, genetics studies provide evidence for a role in
predisposing homozygous subjects of the general population to micro-albuminuria.
|Adult
[MESH]
|Albuminuria/*genetics
[MESH]
|Female
[MESH]
|Genetic Predisposition to Disease/*genetics
[MESH]