2-Aminopurine selectively inhibits splicing of tumor necrosis factor alpha mRNA

2-Aminopurine selectively inhibits splicing of tumor necrosis factor alpha mRNA
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2-氨基嘌呤选择性抑制肿瘤坏死因子 α mRNA 的剪接

DOI:
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发表时间:
1996
影响因子:
5.3
通讯作者:
R. Kaempfer
R. Kaempfer
中科院分区:
生物学2区
文献类型:
--
作者:
N. Jarrous;F. Osman;R. Kaempfer

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2-氨基嘌呤(2-AP)抑制真核细胞翻译起始因子2α亚基的磷酸化,其中PKR也参与信号转导。我们在这里表明,2-AP选择性地抑制原代人类淋巴样细胞中肿瘤坏死因子α(TNF-α)mRNA的表达。2-AP不抑制人肿瘤坏死因子-α基因转录,也不影响信使核糖核酸的稳定性。相反,短暂的前体转录物进入成熟的肿瘤坏死因子-αmRNA的流动被阻断。当2-AP在诱导过程中存在时,未剪接的肿瘤坏死因子-α前体转录产物以mRNA为代价积累。用不同外显子-内含子连接的基因组探针进行核糖核酸酶保护分析,我们发现2-AP阻止了肿瘤坏死因子-αmRNA的剪接。无论是肿瘤坏死因子-β还是白介素1-β基因都没有这种调节作用。2-AP还能抑制从外源性人肿瘤坏死因子-α基因转录的前体RNA的剪接。因此,该基因内的序列对2-AP具有敏感性。然而,控制并不是在特定的剪接部位施加的。我们的结果揭示了一个2-AP敏感成分,在诱导前以功能形式表达,参与了肿瘤坏死因子-αmRNA的剪接。
2-Aminopurine (2-AP) inhibits specific kinases that phosphorylate the alpha subunit of eukaryotic translation initiation factor 2. One of these, PKR, is also involved in signal transduction. We show here that 2-AP selectively inhibits expression of tumor necrosis factor alpha (TNF-alpha) mRNA in primary human lymphoid cells. 2-AP does not inhibit transcription of the human TNF-alpha gene, nor does it affect mRNA stability. Instead, the flow of short-lived precursor transcripts into mature TNF-alpha mRNA is blocked. When 2-AP is present during induction, unspliced TNF-alpha precursor transcripts accumulate at the expense of mRNA. Using RNase protection analysis with genomic probes for different exon-intron junctions, we show that 2-AP blocks splicing of TNF-alpha mRNA. Neither the TNF-beta nor the interleukin-1 beta gene shows such regulation. 2-AP also inhibits splicing of precursor RNA transcribed from an exogenous human TNF-alpha gene. Sequences within this gene thus confer sensitivity to 2-AP. Yet, control is not exerted at a specific splice site. Our results reveal the involvement of a 2-AP-sensitive component, expressed in functional form before induction, in the splicing of TNF-alpha mRNA.
DOI: 10.1039/c8ra05772a
发表时间: 2018-10-10
期刊: RSC ADVANCES
影响因子: 3.9
作者:
Pal, Nabanita;Kim, Taeyeon;Park, Jae-Seo;Cho, Eun-Bum
通讯作者: Cho, Eun-Bum
DOI: 10.1073/pnas.90.1.232
发表时间: 1993-01-01
影响因子: 11.1
作者:
MEURS, EF;GALABRU, J;HOVANESSIAN, AG
通讯作者: HOVANESSIAN, AG
起始因子 eIF-2 α 的磷酸化、mRNA 与 48 S 复合物的结合及其在蛋白质合成起始中的再利用。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
DeBenedetti,A;Baglioni,C
通讯作者: Baglioni,C
DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
作者:
Ferreri,NR;Sarr,T;Askenase,PW;Ruddle,NH
通讯作者: Ruddle,NH