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Array-CGH Analysis Suggests Genetic Heterogeneity in Rhombencephalosynapsis.

F Démurger¹, L Pasquier, C Dubourg

¹Service de Génétique Clinique, CHU Hôpital Sud, Rouen, France ; Equipe Génétique des Pathologies Liées au Développement, UMR 6290 CNRS, IFR 140 GFAS, Université de Rennes 1, Faculté de Médecine, and Laboratoires de, Rouen, France.

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Summary

This summary is machine-generated.

Rhombencephalosynapsis, a rare cerebellar malformation, may have diverse genetic origins. This study identified several chromosomal rearrangements in affected patients, suggesting multiple genetic causes for this condition.

Keywords:

Array-CGH Copy Number Variation NDE1 Rhombencephalosynapsis

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Area of Science:

Neuroscience
Genetics
Developmental Biology

Background:

Rhombencephalosynapsis is an uncommon cerebellar malformation characterized by vermian agenesis and fused hemispheres.
The underlying embryologic and genetic mechanisms remain largely unknown.
Currently, no animal models exist to study this condition.

Purpose of the Study:

To investigate the genetic causes of rhombencephalosynapsis.
To identify candidate genes associated with this cerebellar malformation using microarray analysis.

Main Methods:

Agilent oligonucleotide arrays were employed to screen a cohort of 57 patients with rhombencephalosynapsis.
Detected chromosomal rearrangements were further analyzed using sequencing and in situ hybridization.

Main Results:

Four distinct unbalanced rearrangements were identified: a 16p11.2 deletion, a 14q12q21.2 deletion, an unbalanced translocation t(2p;10q), and a 16p13.11 microdeletion.
The 16p13.11 microdeletion encompassed two candidate genes that were further investigated.

Conclusions:

This microarray screening represents the first genetic analysis of a rhombencephalosynapsis patient cohort.
The findings suggest that rhombencephalosynapsis likely results from heterogeneous genetic causes.