期刊
BRAIN RESEARCH BULLETIN
卷 80, 期 1-2, 页码 79-84出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.brainresbull.2009.04.013
关键词
Trans-2-phenylcyclopropylamine; Zebrafish; Apoptosis; LSD1; Nerve cell; p53
资金
- National Natural Science Foundation of China [30600489]
Trans-2-phenylcyclopropylamine (referred to as PCPA hereafter, also known as tranylcypromine and Parnate) is used clinically as an antidepressant. Here, we use a new model-zebrafish (Danio rerio) to study the molecular mechanisms of its adverse reactions in vivo. Following a PCPA exposure (75 mu M), embryos showed sluggish action (slow swim and slow escape action). Whole mount in situ hybridization showed that sox1a and huc expressions were downregulated in PCPA-treated embryos, which indicated a decrease in the number of nerve cells. TUNEL assay diplayed that the drop of nerve cells number due to excessive apoptosis. Moreover, lysine-specific demethylase 1 morpholino injection (LSD1 MO) also induced increased cellular apoptosis in embryos just as PCPA. RT-PCR at 24 hpf evaluated that the absence of LSD1 resulted in increased expression of two p53 target genes (p21 and bax2). These findings demonstrate for the first time that PCPA-induced apoptosis through inhibition of LSD1 demethylase activity and p53-dependent signaling pathway might be required for the maintenance of nerve cell apoptosis. (C) 2009 Elsevier Inc. All rights reserved.
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