鱼类及其他脊椎动物神经递质含量的比较研究

采用高效液相色谱法测定了变温动物(鱼、蛙、鳖)和恒温动物(鸡、狗、牛)脑和脊髓中多巴胺(DA)和5-羟色胺(5-HT)的含量。结果表明:(1)变温动物和恒温动物脑和脊髓中DA和5-HT含量存在较大差异。变温动物脑和脊髓中DA含量分别为(0.228±0.014)μg/g和(0.155±0.003)μg/g,5-HT含量分别为(0.465±0.139)μg/g和(0.104±0.004)μg/g;恒温动物脑和脊髓中DA含量分别为(0.258±0.015)μg/g和(0.236±0.018)μg/g;脑和脊髓中5-HT为(1.020±0.166)μg/g和(0.712±0.344)μg/g。(2)湖泊与池塘的鲢脑中DA含量分别为(0.197±0.018)μg/g和(0.073±0.012)μg/g,血液中肾上腺素(Ad)含量分别为(0.065±0.013)μg/g和(0.025±0.007)μg/g。这说明DA和Ad在鱼类环境应激中有重要作用。(3)从鱼类经鸟类到哺乳类纵向比较,其神经递质的含量是不同的。以进化论和全息论的观点来看,其中可能蕴藏着生物医药潜力。

Early fossil fish from China illuminates jaw evolution

With the support of the National Natural Science Foundation of China,the Ministry of Science and Technology of China,and the Chinese Academy of Sciences(CAS),the research team led by Prof.Zhu Min(朱敏)at the CAS Key Laboratory of Vertebrate Evolution and Human Origins,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Acadedy of Sciences,discovered a