Transcriptional activation by the androgen receptor in X-linked spinal and bulbar muscular atrophy

被引：29

作者：

Nakajima, H ^{[1
]}

Kimura, F ^{[1
]}

Nakagawa, T ^{[1
]}

Furutama, D ^{[1
]}

Shinoda, K ^{[1
]}

Shimizu, A ^{[1
]}

Ohsawa, N ^{[1
]}

机构：

[1] OSAKA MED COLL,DEPT CLIN PATHOL,TAKATSUKI,OSAKA 569,JAPAN

来源：

JOURNAL OF THE NEUROLOGICAL SCIENCES | 1996年 / 142卷 / 1-2期

关键词：

X-linked spinal and bulbar muscular atrophy; androgen receptor gene; CAG repeat; glutamine tract; CAT assay; transcription factor; NG108-15; cells;

D O I：

10.1016/0022-510X(96)00142-6

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Polyglutamine tracts encoded by trinucleotide CAG repeats have been found in some transcription factors. Expansion of the polyglutamine tracts in the androgen receptor (AR) has been recognized as a cause of X-linked spinal and bulbar muscular atrophy (SBMA). To study the role of AR as a transcription factor in SBMA, we constructed AR genes encoding expanded polyglutamine tracts (repeat numbers = 52, 92, 132, and 212), and analyzed AR-induced transcriptional activation in NG108-15 cells. We found that AR-induced transcriptional activation gradually decreased with increasing glutamine repeat numbers, and polyglutamine expansion caused a specific reduction in transcription activity in motor neurons. However, the degree of reduction was slight in comparison with the normal AR gene and that of SBMA. Thus, subtle disorders of transcriptional control may occur in SBMA.

引用

页码：12 / 16

页数：5

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