促肾上腺皮质激素对N-甲基-D-天冬氨酸诱发幼鼠痉挛模型应激蛋白表达的影响

doi:10.11852/zgetbjzz2018-1097

中国儿童保健杂志 ›› 2019, Vol. 27 ›› Issue (2): 156-159.DOI: 10.11852/zgetbjzz2018-1097

促肾上腺皮质激素对N-甲基-D-天冬氨酸诱发幼鼠痉挛模型应激蛋白表达的影响

洪珂,张弘,李亚坤,陈建忠

深圳市龙华区人民医院儿科,广东深圳 518109

收稿日期:2018-08-15 修回日期:2018-11-21 发布日期:2019-02-20 出版日期:2019-02-20
作者简介:洪珂(1987-), 男,主治医师,本科学历,主要研究方向为儿科相关疾病

Effect of adrenocorticotropic hormone on the expression of stress proteins in infantile spasm model induced by N-methyl-D-aspartate

HONG Ke, ZHANG Hong, LI Ya-kun, CHEN Jian-zhong

Shenzhen Longhua District People′s Hospital, Shenzhen, Guangdong 518109, China

Received:2018-08-15 Revised:2018-11-21 Online:2019-02-20 Published:2019-02-20

摘要/Abstract

摘要： 目的分析促肾上腺皮质激素(ACTH)对婴儿痉挛模型应激蛋白表达的影响,为婴儿痉挛症的治疗提供理论依据。方法将60只新生幼鼠随机分为对照组、N-甲基-D-天冬氨酸(NMDA)组和ACTH组,每组20只。幼鼠出生第11天,ACTH组腹腔注射10 mg/(kg·d) ACTH,其他两组注射等量的生理盐水。幼鼠出生的第15天,NMDA组和ACTH组腹腔注射15 mg/(kg·d) NMDA,对照组注射等量生理盐水。对三组幼鼠痉挛症状进行评分,采用q-PCR法测海马白介素1β(IL-1β)、白介素6(IL-6)和ACTH的mRNA转录水平,Western Blot法测海马促肾上腺皮质激素释放激素(CRH)和促肾上腺皮质激素释放激素1型受体(CRHR1)蛋白表达。结果 NMDA组中幼鼠的痉挛症状评分高于对照组(t=11.236,P<0.001); ACTH组幼鼠的痉挛症状评分低于NMDA组(t=-6.347,P<0.001)。与对照组相比,NMDA组海马IL-1β和IL-6的mRNA转录水平升高(IL-1β: t=6.237,P<0.001;IL-6: t=6.553,P<0.001),ACTH组海马中IL-1β和IL-6的mRNA转录水平低于NMDA组(IL-1β:t=-7.669,P<0.001;IL-6:t=-8.125,P<0.001)。ACTH组海马中ACTH mRNA转录水平高于NMDA组(t=7.758,P<0.001)。与对照组相比,NMDA组海马体CRH和CRHR1蛋白表达上调(CRH: t=7.517,P<0.001;CRHR1: t=7.745,P<0.001),ACTH组海马CRH和CRHR1蛋白表达低于NMDA组(CRH: t=-6.120,P=0.003;CRHR1: t=-6.050,P=0.005)。结论 ACTH可缓解幼鼠的痉挛症状,推测与降低海马体中IL-1β和IL-6的mRNA转录水平,上调ACTH的mRNA转录水平,抑制CRH和CRHR1蛋白表达有关。

关键词: 促肾上腺皮质激素, N-甲基-D-天冬氨酸, 婴儿痉挛, 应激蛋白

Abstract: Objective To analyze the effect of adrenocorticotropic hormone(ACTH) on the expression of stress proteins in infantile spasm model induced by N-methyl-D-aspartate(NMDA), in order to provide theoretical evidence for the treatment of infantile spasm. Methods Totally 60 neonatal rats were randomly divided into control group, NMDA group and ACTH group, with 20 rats in each group. On the 11th day of birth, ACTH group was injected with 10 mg/(kg·d) ACTH intraperitoneally, and the other two groups were injected with the same amount of saline. On the 15th day of birth, 15 mg/(kg·d) NMDA was intraperitoneally injected into NMDA group and ACTH group, and the same amount of saline was injected into control group. Spasticity score was used to score the spasticity symptoms of three groups. The mRNA transcription levels of interleukin 1 beta (IL-1β), interleukin 6 (IL-6) and ACTH in hippocampus were measured by q-PCR. The expressions of corticotropin releasing hormone (CRH) and corticotropin releasing hormone type 1 receptor (CRHR1) in hippocampus were measured by Western Blot method. Results The score of spasticity in NMDA group was significantly higher than that in control group (t=11.236, P<0.001). The score of spasmodic symptoms in ACTH group was lower than that in NMDA group (t=-6.347, P<0.001). Compared with the control group, the transcription levels of IL-1β and IL-6 in the hippocampus of NMDA group increased (IL-1β:t=6.237, P<0.001; IL-6: t=6.553, P<0.001). The transcriptional levels of IL-1βand IL-6 in the hippocampus of ACTH group were lower than those of NMDA group (IL-1β: t=-7.669, P<0.001; IL-6: t=-8.125, P<0.001). The transcription level of ACTH mRNA in hippocampus of group ACTH was higher than that of NMDA group (t=7.758, P<0.001). Compared with the control group, the expression levels of CRH and CRHR1 protein in hippocampus of NMDA group were up-regulated (CRH: t=7.517, P<0.001; CRHR1: t=7.745, P<0.001). While the expression of CRH and CRHR1 protein in ACTH group was lower than that in NMDA group (CRH: t=-6.120,P=0.003; CRHR 1: t=-6.050, P=0.005 ). Conclusions ACTH could relieve spasm symptom induced by NMDA in neonatal rats. It is speculated that ACTH may help decrease the mRNA expressions of IL-1β and IL-6 in the hippocampal tissues of neonatal rats, up-regulate the mRNA expression of ACTH, and inhibit the protein expressions of CRH and CRHR1.

Key words: adrenocorticotropic hormone, N-methyl-D-aspartate, infantile spasticity, stress protein

中图分类号:

R575.1

洪珂,张弘,李亚坤,陈建忠. 促肾上腺皮质激素对N-甲基-D-天冬氨酸诱发幼鼠痉挛模型应激蛋白表达的影响[J]. 中国儿童保健杂志, 2019, 27(2): 156-159.

HONG Ke, ZHANG Hong, LI Ya-kun, CHEN Jian-zhong. Effect of adrenocorticotropic hormone on the expression of stress proteins in infantile spasm model induced by N-methyl-D-aspartate[J]. journal1, 2019, 27(2): 156-159.

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促肾上腺皮质激素对N-甲基-D-天冬氨酸诱发幼鼠痉挛模型应激蛋白表达的影响

Effect of adrenocorticotropic hormone on the expression of stress proteins in infantile spasm model induced by N-methyl-D-aspartate

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