Induction of cell cycle arrest and morphological differentiation by Nurr1 and retinoids in dopamine MN9D cells

被引:109
作者
Castro, DS
Hermanson, E
Joseph, B
Wallén, Å
Aarnisalo, P
Heller, A
Perlmann, T
机构
[1] Ludwig Inst Canc Res, S-17177 Stockholm, Sweden
[2] Karolinska Inst, Dept Cell & Mol Biol, S-17177 Stockholm, Sweden
[3] Univ Chicago, Dept Neurobiol Pharmacol & Physiol, Chicago, IL 60637 USA
关键词
D O I
10.1074/jbc.M107013200
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Dopamine cells are generated in the ventral midbrain during embryonic development. The progressive degeneration of these cells in patients with Parkinson's disease, and the potential therapeutic benefit by transplantation of in vitro generated dopamine cells, has triggered intense interest in understanding the process whereby these cells develop. Nurr1 is an orphan nuclear receptor essential for the development of midbrain dopaminergic neurons. However, the mechanism by which Nurr1 promotes dopamine cell differentiation has remained unknown. In this study we have used a dopamine-synthesizing cell line (MN9D) with immature characteristics to analyze the function of Nurr1 in dopamine cell development. The results demonstrate that Nurr1 can induce cell cycle arrest and a highly differentiated cell morphology in these cells. These two functions were both mediated through a DNA binding-dependent mechanism that did not require Nurr1 interaction with the heterodimerization partner retinoid X receptor. However, retinoids can promote the differentiation of MN9D cells independently of Nurr1. Importantly, the closely related orphan receptors NGFI-B and Nor1 were also able to induce cell cycle arrest and differentiation. Thus, the growth inhibitory activities of the NGFI-B/Nurr1/ Nor1 orphan receptors, along with their widespread expression patterns both during development and in the adult, suggest a more general role in control of cell proliferation in the developing embryo and in adult tissues.
引用
收藏
页码:43277 / 43284
页数:8
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