c-Jun氨基末端激酶介導的FOXO3a核轉位在缺氧缺血性腦損傷新生大鼠神經元凋亡中的作用
[Abstract]:Objective to investigate the protective mechanism of inhibition of c-Jun amino-terminal kinase (JNK) / nuclear transcription factor FOXO3a signaling pathway on neuronal apoptosis in neonatal (HIBD) rats with hypoxic-ischemic brain injury. Methods Sixty-four 7-day-old Sprague-Dawley rats were randomly divided into sham-operation group, hypoxic-ischemic (HI) group, dimethyl sulfoxide (DMSO) solvent group and AS601245 intervention group (JNK inhibitor group). All the animals were killed 24 hours after modeling. The expression levels of FOXO3a, cytoplasm FOXO3a, and apoptosis-promoting proteins Bim and CC3 in the nucleus of JNK,p-JNK,FOXO3a, were detected by Western blot assay. Apoptosis of nerve cells was detected by TUNEL staining. Results compared with the sham-operated group, the level of p-JNK protein increased at 24 h after HI (P0.01), the level of nuclear FOXO3a protein increased, and the level of cytoplasmic FOXO3a protein decreased (P0.01); Bim and CC3 expression level increased (P0.01). Compared with the HI group and the DMSO solvent group, the p-JNK protein level in the JNK inhibitor group decreased (P0.01), the FOXO3a protein level in the nucleus decreased and the FOXO3a protein level in the cytoplasm increased (P0.01). The expression of Bim and CC3 decreased (P0.01). JNK inhibitor group, compared with HI group and DMSO group (P0.01). Conclusion during HIBD, JNK is phosphorylated and its activity is increased, inhibition of JNK activity can inhibit FOXO3a nuclear translocation, down-regulate the expression of Bim and CC3, and decrease neuronal apoptosis.
【作者單位】: 四川大學華西第二醫(yī)院兒科/出生缺陷與相關婦兒疾病教育部重點實驗室;
【基金】:國家自然科學基金(81000262) 四川省衛(wèi)生和計劃生育委員會科研課題(16PJ240);四川省衛(wèi)生和計劃生育委員會資助項目(140045)
【分類號】:R742
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