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Further delineation of the 17p13.3 microdeletion involving YWHAE but distal to PAFAH1B1: four additional patients.

Abstract：

BACKGROUND:The 17p13.3 deletion syndrome (or Miller-Dieker syndrome, MDS, MIM 247200) is characterized by lissencephaly, mental retardation and facial dysmorphism. The phenotype is attributed to haploinsufficiency of two genes present in the minimal critical region of MDS: PAFAH1B1 (formerly referred to as LIS1) and YWHAE. Whereas isolated PAFAH1B1 deletion causes lissencephaly, YWHAE is a candidate for the dysmorphic phenotype associated with MDS. OBJECTIVE:We describe clinical, neuroradiological and molecular data in four patients with a 17p13.3 deletion distal to PAFAH1B1 involving YWHAE. RESULTS:All patients presented with mild or moderate developmental delay and pre and/or post-natal growth retardation. Patients A, B and C had neuro-imaging anomalies: leucoencephalopathy with macrocephaly (patients A and C), Chiari type 1 malformation (patient A) and paraventricular cysts (patient C). Patient B had patent ductus arteriosus and pulmonary arterial hypertension. Patient C had unilateral club foot. Patient D had enlarged Virchow Robin spaces, microcornea, and chorioretinal and lens coloboma. Array-CGH revealed de novo terminal 17p13.3 deletions for patient A and B, and showed interstitial 17p13.3 deletions of 1.4 Mb for patient C and of 0.5 Mb for patient D. In all patients, PAFAH1B1 was not deleted. CONCLUSION:Our patients confirm that 17p deletion distal to PAFAH1B1 have a distinctive phenotype : mild mental retardation, moderate to severe growth restriction, white matter abnormalities and developmental defects including Chiari type 1 malformation and coloboma. Our patients contribute to the delineation and clinical characterization of 17p13.3 deletion distal to PAFAH1B1 and highlight the role of the region containing YWHAE in brain and eye development and in somatic growth.

journal_name

Eur J Med Genet

journal_title

European journal of medical genetics

authors

Schiff M,Delahaye A,Andrieux J,Sanlaville D,Vincent-Delorme C,Aboura A,Benzacken B,Bouquillon S,Elmaleh-Berges M,Labalme A,Passemard S,Perrin L,Manouvrier-Hanu S,Edery P,Verloes A,Drunat S

doi

10.1016/j.ejmg.2010.06.009

subject

Has Abstract

pub_date

2010-09-01 00:00:00

pages

303-8

issue

5

eissn

1769-7212

issn

1878-0849

pii

S1769-7212(10)00064-9

journal_volume

53

pub_type

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