Mapping of equine cerebellar abiotrophy to ECA2 and identification of a potential causative mutation affecting expression of MUTYH.

Abstract:

:Equine Cerebellar Abiotrophy (CA) is a neurological disease found in Arabian horses. CA is characterized by post-natal degeneration of the Purkinje cells of the cerebellum. Signs of CA include ataxia, head tremors, and a lack of balance equilibrium. We have discovered a linkage of the CA phenotype to a microsatellite marker on ECA2 and identified a region of conserved homozygosity spanning approximately 142 kb. Complete sequencing of the four genes in this region identified one SNP found only in Arabian horses, located in exon 4 of TOE1 and approximately 1200 base pairs upstream of MUTYH, adjacent to a possible binding site for the transcription factor GATA2. qPCR analysis of cDNA from the cerebella of affected and unaffected horses suggested that MUTYH expression is down-regulated in affected horses. This SNP may therefore have a function effect on TOE1, or a regulatory effect on MUTYH by negatively affecting the binding affinity of GATA2.

journal_name

Genomics

journal_title

Genomics

authors

Brault LS,Cooper CA,Famula TR,Murray JD,Penedo MC

doi

10.1016/j.ygeno.2010.11.006

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

121-9

issue

2

eissn

0888-7543

issn

1089-8646

pii

S0888-7543(10)00243-0

journal_volume

97

pub_type

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