| RRC ID |
27903
|
| 著者 |
Lee K, Mattiske T, Kitamura K, Gecz J, Shoubridge C.
|
| タイトル |
Reduced polyalanine-expanded Arx mutant protein in developing mouse subpallium alters Lmo1 transcriptional regulation.
|
| ジャーナル |
Hum Mol Genet
|
| Abstract |
Intellectual disability (ID) is a highly prevalent disorder that affects 1-3% of the population. The Aristaless-related homeobox gene (ARX) is a frequently mutated X-linked ID gene and encodes a transcription factor indispensable for proper forebrain, testis and pancreas development. Polyalanine expansions account for over half of all mutations in ARX and clinically give rise to a spectrum of ID and seizures. To understand how the polyalanine expansions cause the clinical phenotype, we studied mouse models of the two most frequent polyalanine expansion mutations (Arx((GCG)7) and Arx(432-455dup24)). Neither model showed evidence of protein aggregates; however, a marked reduction of Arx protein abundance within the developing forebrain was striking. Examining the expression of known Arx target genes, we found a more prominent loss of Lmo1 repression in Arx((GCG7)/Y) compared with Arx(432-455dup24/Y) mice at 12.5 and 14.5 dpc, stages of peak neural proliferation and neurogenesis, respectively. Once neurogenesis concludes both mutant mouse models showed similar loss of Lmo1 repression. We propose that this temporal difference in the loss of Lmo1 repression may be one of the causes accounting for the phenotypic differences identified between the Arx((GCG)7)and Arx(432-455dup24) mouse models. It is yet to be determined what effect these mutations have on ARX protein in affected males in the human setting.
|
| 巻・号 |
23(4)
|
| ページ |
1084-94
|
| 公開日 |
2014-2-15
|
| DOI |
10.1093/hmg/ddt503
|
| PII |
ddt503
|
| PMID |
24122442
|
| MeSH |
Animals
Female
Gene Expression Regulation, Developmental*
Homeodomain Proteins / genetics*
Homeodomain Proteins / metabolism
Humans
LIM Domain Proteins / genetics*
LIM Domain Proteins / metabolism
Male
Mice
Mice, Inbred C57BL
Mice, Transgenic
Mutation
Neurogenesis
Nuclear Proteins / genetics*
Nuclear Proteins / metabolism
Peptides / genetics
Prosencephalon / embryology
Prosencephalon / metabolism
Telencephalon / embryology
Telencephalon / metabolism*
Transcription Factors / genetics*
Transcription Factors / metabolism
Transcription, Genetic
|
| IF |
5.101
|
| 引用数 |
12
|
|
WOS 分野
|
GENETICS & HEREDITY
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| リソース情報 |
| 実験動物マウス |
RBRC03653
RBRC03654 |
