Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25983245
.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
2015 ; 96
(6
): 948-54
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Biallelic mutations in the autophagy regulator DRAM2 cause retinal dystrophy with
early macular involvement
#MMPMID25983245
El-Asrag ME
; Sergouniotis PI
; McKibbin M
; Plagnol V
; Sheridan E
; Waseem N
; Abdelhamed Z
; McKeefry D
; Van Schil K
; Poulter JA
; Johnson CA
; Carr IM
; Leroy BP
; De Baere E
; Inglehearn CF
; Webster AR
; Toomes C
; Ali M
Am J Hum Genet
2015[Jun]; 96
(6
): 948-54
PMID25983245
show ga
Retinal dystrophies are an overlapping group of genetically heterogeneous
conditions resulting from mutations in more than 250 genes. Here we describe five
families affected by an adult-onset retinal dystrophy with early macular
involvement and associated central visual loss in the third or fourth decade of
life. Affected individuals were found to harbor disease-causing variants in DRAM2
(DNA-damage regulated autophagy modulator protein 2). Homozygosity mapping and
exome sequencing in a large, consanguineous British family of Pakistani origin
revealed a homozygous frameshift variant (c.140delG [p.Gly47Valfs(?)3]) in nine
affected family members. Sanger sequencing of DRAM2 in 322 unrelated probands
with retinal dystrophy revealed one European subject with compound heterozygous
DRAM2 changes (c.494G>A [p.Trp165(?)] and c.131G>A [p.Ser44Asn]). Inspection of
previously generated exome sequencing data in unsolved retinal dystrophy cases
identified a homozygous variant in an individual of Indian origin (c.64_66del
[p.Ala22del]). Independently, a gene-based case-control association study was
conducted via an exome sequencing dataset of 18 phenotypically similar case
subjects and 1,917 control subjects. Using a recessive model and a binomial test
for rare, presumed biallelic, variants, we found DRAM2 to be the most
statistically enriched gene; one subject was a homozygote (c.362A>T
[p.His121Leu]) and another a compound heterozygote (c.79T>C [p.Tyr27His] and
c.217_225del [p.Val73_Tyr75del]). DRAM2 encodes a transmembrane lysosomal protein
thought to play a role in the initiation of autophagy. Immunohistochemical
analysis showed DRAM2 localization to photoreceptor inner segments and to the
apical surface of retinal pigment epithelial cells where it might be involved in
the process of photoreceptor renewal and recycling to preserve visual function.