Muñoz-Blanco J, Yusta B, Cordoba F
Pharmacol Biochem Behav. 1986 Jul;25(1):71-5. doi: 10.1016/0091-3057(86)90232-7.
The amino acid content of crude synaptosomal fractions from the limbic system and related CNS regions showed significant differences between the aggressive Spanish fighting-bull and the non-aggressive Friesan bull breeds. Neurotransmitter amino acids (glutamate, aspartate, GABA and glycine) were the most unequally distributed. A higher ratio of excitatory to inhibitory neurotransmitter amino acids was always found in all the CNS regions studied in the aggressive breed. The concentrations of five non-transmitter amino acids (threonine, alanine, serine, leucine and isoleucine) showed minor variations between both studied bull strains and cannot be ascribed to differences in central energy metabolism. The results are explained in terms of a possible relationship between the amino acid neurotransmitter levels and the innate aggressiveness of the Spanish fighting-bull.
来自边缘系统及相关中枢神经系统区域的粗制突触体组分的氨基酸含量显示，具有攻击性的西班牙斗牛和不具攻击性的弗里斯兰公牛品种之间存在显著差异。神经递质氨基酸（谷氨酸、天冬氨酸、γ-氨基丁酸和甘氨酸）分布最不均衡。在攻击性品种的所有研究中枢神经系统区域中，总是发现兴奋性神经递质氨基酸与抑制性神经递质氨基酸的比例更高。五种非递质氨基酸（苏氨酸、丙氨酸、丝氨酸、亮氨酸和异亮氨酸）的浓度在两个研究的公牛品系之间显示出微小差异，且不能归因于中枢能量代谢的差异。这些结果根据氨基酸神经递质水平与西班牙斗牛先天攻击性之间的可能关系进行了解释。
