Bcl-2 rescues motoneurons from early cell death in the cervical spinal cord of the chicken embryo.
Bcl-2 rescues motoneurons from early cell death in the cervical spinal cord of the chicken embryo.
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Bcl-2 可将鸡胚颈脊髓中的运动神经元从早期细胞死亡中拯救出来。
DOI:
10.1002/neu.10108
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
Yaginuma,Hiroyuki
中科院分区:
文献类型:
--
作者:
Sato,Noboru;Sakuma,Chie;Kato,Hiromi;Milligan,CarolanneE;Oppenheim,RonaldW;Yaginuma,Hiroyuki
Motoneurons (MNs) in the cervical spinal cord of the chicken embryo undergo programmed cell death (PCD) between embryonic day (E) 4 and E5. The intracellular molecules regulating this early phase of PCD remain unknown. Here we show that introduction of Bcl‐2 by a replication‐competent avian retroviral vector prevented MN degeneration at E4.5, whereas the expression of the green fluorescent protein (GFP) was ineffective. Bcl‐2 expression did not affect the number of Islet‐1/2‐positive MNs at the onset of cell death (E4). However, when examined at the end of the cell death period (E5.5), the number of Islet‐1/2‐positive MNs was clearly increased in Bcl‐2‐transfected embryos compared with control and GFP‐transfected embryos. Activation of caspase‐3, which is normally observed in this early MN death, was also prevented by Bcl‐2. Thus, MNs in the cervical spinal cord appear to use intracellular pathway(s) for early PCD that is responsive to Bcl‐2. © 2002 Wiley Periodicals, Inc. J Neurobiol 53: 381–390, 2002
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