【摘要】 目的探讨精神应激(天敌应激)下脑不对称性对下丘脑-垂体-肾上腺(HPA)轴以及细胞因子IL-1β、IL-6的影响。方法运用伸爪取食法根据右利分别将小鼠区分出左利、右利和双利3组,暴露在鼠类天敌(猫)应激环境中,分别进行急性天敌应激,慢性天敌应激后,取血浆用EIA法检测血浆皮质酮水平,ELISA法测定IL-1β、IL-6含量。结果(1)血浆皮质酮水平急性天敌应激后右利组皮质酮升高,左利组下降,右利组水平显著高于左利组以及相应正常生理组(P<0.05);慢性应激后,3组均上升,其中右利、双利组显著高于其相应正常生理组(P<0.05),左利组亦高于急性应激下的左利组(P<0.05)。(2)血浆IL-1β水平正常生理条件下左、右利小鼠显著高于双利组(P<0.01),总体依次为左利>右利>双利;慢性应激后,左利组显著高于右利组(P<0.05)。(3)血浆IL-6水平慢性应激后,双利组显著高于左、右利两组(P<0.05)。结论小鼠在天敌应激下,HPA轴与血浆IL-1β、IL-6水平均受大脑的异质调控,提示精神应激下脑不对称性对免疫内分泌功能有影响。更多还原

【Abstract】 AIM: To investigate the influence of predator stress on hypothalamic-pituitary-adrenal (HPA) axis and IL-1β, IL-6 in mice with brain asymmetry. METHODS: By using paw preference test, right-pawed, left-pawed, and ambidextrous-pawed mice model were established. Mice with brain lateralization were exposed to their predator (cat). After acute and chronic predator stress by cats, EIA and ELISA were applied to detect plasma levels of corticosterone (CS), IL-1β and IL-6. RESULTS: (1) The level of plasma CS: in both acute and chronic predator stress group, right-pawed and ambidextrous mice had a higher level than that in their corresponding normal group (P<0.05). Meanwhile, the two groups also showed higher level than left-pawed in acute stress. Compared with the corresponding group under acute stress, left-pawed had much higher level of CS under chronic stress (P<0.05). (2) The level of plasma IL-1β: in normal group, left and right-pawed mice were higher than that in ambidextrous mice (P<0.01), of which left-pawed was the highest. In chronic stress group, the left-pawed exhibited higher level than that in right-pawed mice (P<0.05). (3) The level of IL-6: after chronic predator stress, ambidextrous mice had much higher level than that in other two groups (P<0.05). CONCLUSION: Under predator stress, the HPA axis and plasma proinflammatory cytokines (IL-1β, IL-6) in BALB/C mice were modulated by the brain asymmetrically, and brain lateralization may influence the function of immuno-endocrine network in psychological circumstances.更多还原