首页> 外文会议>Conference on Optical Technologies in Biophysics and Medicine IV; Oct 1-4, 2002; Saratov, Russia >Neuro-glial relationships in the crayfish stretch receptor under photodynamic injury: changes in the nuclear morphology
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Neuro-glial relationships in the crayfish stretch receptor under photodynamic injury: changes in the nuclear morphology

机译:小龙虾拉伸受体在光动力损伤下的神经胶质关系:核形态的变化

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Sulphonated alumophthalocyanine Photosens AlPcS_n (mean n = 3.1) localizes predominately in the glial envelope surrounding the crayfish stretch receptor neuron. PDT treatment of the isolated stretch receptor organ with 10~(-7) M Photosens inhibits and then irreversibly abolishes neuron activity for approximately 20 min. Then, in 1.7 h after PDT treatment, the plasma membrane loses its integrity and propidium iodide enters into the cytosol and stains the nuclear chromatin. Neuron nucleus progressively shrinks but apoptotic nucleus fragmentation is not occurred. This neuron death type is delayed necrosis. Nuclei of the satellite glial cells also shrink. In 8 h after PDT treatment some of them become fragmented that is characteristic for apoptosis, whereas others lose the plasma membrane integrity and die through necrosis. However, glial cells not only die but also proliferate under PDT treatment and their number is increased. This gliosis is probably aimed to neuron saving.
机译:磺化铝酞菁光敏素AlPcS_n(平均值n = 3.1)主要位于小龙虾拉伸受体神经元周围的神经胶质包膜中。用10〜(-7)M光敏素对分离的牵张受体器官进行PDT治疗可抑制神经元,然后不可逆地消除其神经活性,持续约20分钟。然后,PDT处理后1.7小时,质膜失去完整性,碘化丙啶进入细胞质并染色核染色质。神经元核逐渐萎缩,但未发生凋亡核碎片。这种神经元死亡类型是迟发性坏死。附属神经胶质细胞的细胞核也缩小。 PDT处理后的8小时内,其中一些变得破碎,这是凋亡的特征,而其他的则失去质膜完整性并因坏死而死亡。但是,在PDT处理下,神经胶质细胞不仅死亡,而且增殖,其数量增加。这种神经胶质变性可能旨在保存神经元。

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