【摘要】 本文旨在研究缺氧刺激条件下中缝背核内远位触液神经元Fos蛋白的表达情况。应用低压氧舱仿海拔8000米高空缺氧模型,采用侧脑室注射CB(霍乱毒素B亚单位)标记中缝背核内的远位触液神经元,并用Fos免疫组化和CB/Fos免疫组化双重染色方法显示Fos在中缝背核远位触液神经元内的表达情况。结果表明中缝背核内存在大量的CB标记神经元(31.16±3.36/每张切片)。缺氧实验组中缝背核内Fos阳性神经元数显著增加(40.28±2.17/每张切片,P<0.05),并可见CB/Fos双标神经元(2.00±0.39/每张切片)。对照组中缝背核内Fos阳性神经元数较少(5.55±0.81/每张切片),未见CB/Fos双标神经元。本文结果提示在缺氧刺激条件下,中缝背核内部分远位触液神经元在脑脑脊液之间的信息传递及功能调节中可能发挥一定作用。更多还原

【Abstract】 The effects of hypoxia on the expression of Fos was studied in the distal cerebrospinal fluid contacting neurons (CSF-CNs) in the dorsal raphe nucleus (DR) of the rat. The hypoxic models mimic 8000 m high level were established in a high-altitude decompression chamber. Injecting the tracer of CB (chorela toxin B subunit) into the rat’s lateral ventricles, we investigated the distribution of the distal CSF-CNs in the DR. The single and double immunohistochemistry staining with antibodies to Fos and CB were used to observe the expression of Fos in the distal CSF-CNs in the DR. The results showed that a large number of CB-like immunoreactive (-LI) neurons (31.16±3.36/per section) were located in the DR. In hypoxic experimental rats, the number of Fos-LI neurons was increased sharply (40.28±2.17/per section, P<0.05 compared to control rats), and a few CB/Fos-LI neurons (2.00±0.39/per section) could be observed in the DR. In control rats, several Fos-LI neurons (5.55±0.81/per section) and no CB/Fos-LI neuron could be observed in the DR. These results suggest that some of the distal CSF-CNs in the DR may play roles in transmitting information between brain and cerebrospinal fluid and modulating the function of brain following hypoxic stimulation.更多还原