当前位置： SCI文献检索 > NEUROBIOLOGY OF DISEASE期刊下所有文献 > A double point mutation in the DNA-binding region of Egr2 switches its function from inhibition to induction of proliferation: A potential contribution to the development of congenital hypomyelinating neuropathy.

A double point mutation in the DNA-binding region of Egr2 switches its function from inhibition to induction of proliferation: A potential contribution to the development of congenital hypomyelinating neuropathy.

Abstract：

:Mutations in the DNA-binding domain of EGR2 are associated with severe autosomal dominant forms of peripheral neuropathy. In this study, we show that one such Egr2 mutant (S382R, D383Y), when expressed in Schwann cells in vitro, is not transcriptionally inactive but retains residual wild-type Egr2 functions, including inhibition of transforming growth factor-beta-induced Schwann cell death and an ability to induce the cytoskeletal protein periaxin. More importantly, this mutant Egr2 has aberrant effects in Schwann cells, enhancing DNA synthesis both in the presence and absence of the putative axonal mitogen, beta-neuregulin 1. This is in stark contrast to wild-type Egr2, which causes withdrawal from the cell cycle. Furthermore, mutant Egr2 upregulates cyclin D1 and reduces levels of the cell cycle inhibitor, p27. These observations add significant new evidence to explain how this mutation leads to congenital hypomyelinating neuropathy in humans.

journal_name

Neurobiol Dis

journal_title

Neurobiology of disease

authors

Arthur-Farraj P,Mirsky R,Parkinson DB,Jessen KR

doi

10.1016/j.nbd.2006.06.006

subject

Has Abstract

pub_date

2006-10-01 00:00:00

pages

159-69

issue

1

eissn

0969-9961

issn

1095-953X

pii

S0969-9961(06)00143-4

journal_volume

24

pub_type

杂志文章

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