首页> 外文期刊>Journal of Behavioral and Brain Science >2,5-Dihydro-2,4,5-Trimethylthiazoline (TMT)-Induced Neuronal Activation Pattern and Behavioral Fear Response in GAD67 Mice
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2,5-Dihydro-2,4,5-Trimethylthiazoline (TMT)-Induced Neuronal Activation Pattern and Behavioral Fear Response in GAD67 Mice

机译:GAD67小鼠中2,5-二氢-2,4,5-三甲基噻唑啉(TMT)诱导的神经元激活模式和行为恐惧反应。

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The synthetic predator odor 2,5-dihydro-2,4,5-trimethylthiazoline (TMT) was used to induce innate fear in male GAD67 mice and behavioral changes were correlated with c-fos mRNA levels as marker for neuronal activation to reveal underlying activated fear circuits. Results show the same amount of increased freezing and decreased rearing and grooming behavior of TMT-exposed GAD67 mice and wild type littermates, and therefore suggest that heterozygous knock-in of GFP in the GAD67 gene that is associated with a fifty percent decreased GAD67 protein level in the brain, has no impact on TMT-induced behavioral effects. Exposure to TMT significantly increased the number of c-fos mRNA positive cells in the main olfactory bulb (MOB), the lateral septum (LS), the bed nucleus of the stria terminalis (BNST), the central amygdala (CeA), the anterior-ventral (MeAav), the anterior-dorsal (MeAad) and the posterior-ventral (MeApv) part of the medial amygdala in GAD67 mice. Thus, to further investigate the role of GABAergic neurons in TMT-induced uncontrollable stress responses GAD67 mice that provide the advantage of prelabeled GABAergic neurons through the GABA neuron specific expression of GFP could be a suitable model organism.
机译:合成的捕食者气味2,5-二氢-2,4,5-三甲基噻唑啉(TMT)用于诱发雄性GAD67小鼠先天性恐惧,行为变化与c-fos mRNA水平相关,作为神经元活化的标志物,揭示了潜在的活化恐惧电路。结果显示,与暴露于TMT的GAD67小鼠和野生型同窝小鼠相同数量的冰冻增加,饲养和修饰行为减少,因此表明GAD67基因中GFP的杂合敲除与GAD67蛋白水平降低了50%有关在大脑中,对TMT诱导的行为影响没有影响。暴露于TMT会显着增加主要嗅球(MOB),侧隔(LS),纹状体床核(BNST),中央杏仁核(CeA),前壁c-fos mRNA阳性细胞的数量GAD67小鼠的杏仁核的前腹(MeAav),前背(MeAad)和后腹(MeApv)部分。因此,为了进一步研究GABA能神经元在TMT诱导的不可控制的应激反应中的作用,通过GFP的GABA神经元特异性表达提供预先标记的GABA能神经元的GAD67小鼠可能是合适的模型生物。

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