Pleiotropic effects of CEP290 (NPHP6) mutations extend to Meckel syndrome.
Meckel syndrome (MKS) is a rare autosomal recessive lethal condition characterized by central nervous system malformations, polydactyly, multicystic kidney dysplasia, and ductal changes of the liver. Three loci have been mapped (MKS1-MKS3), and two genes have been identified (MKS1/FLJ20345 and MKS3/TMEM67), whereas the gene at the MKS2 locus remains unknown. To identify new MKS loci, a genomewide linkage scan was performed using 10-cM-resolution microsatellite markers in eight families. The highest heterogeneity LOD score was obtained for chromosome 12, in an interval containing CEP290, a gene recently identified as causative of Joubert syndrome (JS) and isolated Leber congenital amaurosis. In view of our recent findings of allelism, at the MKS3 locus, between these two disorders, CEP290 was considered a candidate, and homozygous or compound heterozygous truncating mutations were identified in four families. Sequencing of additional cases identified CEP290 mutations in two fetuses with MKS and in four families presenting a cerebro-reno-digital syndrome, with a phenotype overlapping MKS and JS, further demonstrating that MKS and JS can be variable expressions of the same ciliopathy. These data identify a fourth locus for MKS (MKS4) and the CEP290 gene as responsible for MKS.
Baala
Lekbir
L
Université René Descartes et INSERM U-781, Hôpital Necker-Enfants Malades, 149 rue de Sèvres, 75743 Paris Cedex 15, France.
Audollent
Sophie
S
Martinovic
Jéléna
J
Ozilou
Catherine
C
Babron
Marie-Claude
MC
Sivanandamoorthy
Sivanthiny
S
Saunier
Sophie
S
Salomon
Rémi
R
Gonzales
Marie
M
Rattenberry
Eleanor
E
Esculpavit
Chantal
C
Toutain
Annick
A
Moraine
Claude
C
Parent
Philippe
P
Marcorelles
Pascale
P
Dauge
Marie-Christine
MC
Roume
Joëlle
J
Le Merrer
Martine
M
Meiner
Vardiella
V
Meir
Karen
K
Menez
Françoise
F
Beaufrère
Anne-Marie
AM
Francannet
Christine
C
Tantau
Julia
J
Sinico
Martine
M
Dumez
Yves
Y
MacDonald
Fiona
F
Munnich
Arnold
A
Lyonnet
Stanislas
S
Gubler
Marie-Claire
MC
Génin
Emmanuelle
E
Johnson
Colin A
CA
Vekemans
Michel
M
Encha-Razavi
Férechté
F
Attié-Bitach
Tania
T
D000015:Abnormalities, Multiple / Q000235:genetics* / Q000473:pathology; D000951:Antigens, Neoplasm / Q000235:genetics*; D001921:Brain / Q000002:abnormalities*; D018797:Cell Cycle Proteins; D003598:Cytoskeletal Proteins; D004252:DNA Mutational Analysis; D005260:Female; D006239:Haplotypes; D006801:Humans; D008099:Liver / Q000002:abnormalities* / Q000473:pathology; D008126:Lod Score; D008297:Male; D021782:Multicystic Dysplastic Kidney / Q000235:genetics* / Q000473:pathology; D009154:Mutation; D009363:Neoplasm Proteins / Q000235:genetics*; D010375:Pedigree; D017689:Polydactyly / Q000235:genetics*; D011168:Portal System / Q000002:abnormalities*; D013577:Syndrome
D000951:Antigens, Neoplasm; D018797:Cell Cycle Proteins; C493903:Cep290 protein, human; D003598:Cytoskeletal Proteins; D009363:Neoplasm Proteins