Meprin B: Transcriptional and posttranscriptional regulation of the meprin β metalloproteinase subunit in human and mouse cancer cells

Meprin B: Transcriptional and posttranscriptional regulation of the meprin β metalloproteinase subunit in human and mouse cancer cells
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Meprin B:人类和小鼠癌细胞中 meprin β 金属蛋白酶亚基的转录和转录后调节

DOI:
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发表时间:
1999
期刊:
Acta Pathologica, Microbiologica et Immunologica Scandinavica (APMIS)
影响因子:
--
通讯作者:
J. Bond
J. Bond
中科院分区:
--
文献类型:
--
作者:
G. Matters;J. Bond

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编码细胞表面金属蛋白酶meprin β的一种新的mRNA亚型在小鼠畸胎瘤细胞和多种培养的人癌细胞中表达。在小鼠和人细胞中,与正常肾脏和肠上皮中表达的meprin β mRNA亚型相比,癌细胞特异性mRNA亚型(称为“β”)具有延长的5′ UTR。本文的工作旨在确定meprin β和β'分别在正常细胞和癌细胞中表达的分子机制。对小鼠meprin β基因5′端的分析表明,β和β ′ mRNA亚型中的独特序列由不同的外显子编码,这些外显子交替剪接,并从独立的启动子转录。相比之下,人meprin β和β'mRNA具有相同的序列,除了在β'的5 'UTR序列中有87个额外的碱基,这表明单个混合使用的启动子指导同种型的表达。人meprin β'转录起始位点的上游区域含有与肠特异性基因启动子同源的元件,散布有AP-1和PEA 3元件;后者对癌细胞中的meprin β'启动子活性至关重要。佛波醇肉豆蔻酸酯增加了培养的人结肠癌细胞中的meprin β' mRNA水平,进一步证明AP-1/PEA 3位点积极参与meprin β'表达。
A novel mRNA isoform encoding the cell surface metalloproteinase meprin β is expressed in mouse teratocarcinoma cells and in a variety of cultured human cancer cells. In both mouse and human cells, the cancer cell‐specific mRNA isoform, referred to as β', has an extended 5′ UTR as compared to the meprin β mRNA isoform expressed in normal kidney and intestinal epithelium. The work herein aimed to determine the molecular mechanisms for the expression of meprin β and β' in normal and cancer cells, respectively. Analysis of the 5′ end of the mouse meprin β gene revealed that the unique sequences in the β and β' mRNA isoforms are encoded by separate exons that are alternately spliced, and transcribed from independent promoters. By contrast, the human meprin β and β' mRNAs have identical sequences except for 87 additional bases in the 5′ UTR sequence of β', indicating that a single, mixed usage promoter directs expression of the isoforms. The region upstream of the human meprin β' transcription start site contained elements with homology to the promoters of intestine‐specific genes, interspersed with AP‐1 and PEA3 elements; the latter were essential to meprin β' promoter activity in cancer cells. Phorbol myristal acetate increased meprin β' mRNA levels in cultured human colon cancer cells, providing further evidence that AP‐1/PEA3 sites are actively involved in meprin β' expression.
DOI: 10.1016/s0021-9258(17)42131-4
发表时间: 1994-01
期刊: The Journal of biological chemistry
影响因子: --
作者:
M. Gaire;Z. Magbanua;S. Mcdonnell;L. McNeil;D. Lovett;L. Matrisian
通讯作者: M. Gaire;Z. Magbanua;S. Mcdonnell;L. McNeil;D. Lovett;L. Matrisian
梅普林斯 A 和 B.
DOI: 10.1016/0076-6879(95)48022-6
发表时间: 1995
影响因子: --
作者:
Wolz,RL;Bond,JS
通讯作者: Bond,JS
小鼠 meprin β 亚基的克隆、表达和染色体定位。
DOI: --
发表时间: 1993
期刊: The Journal of biological chemistry
影响因子: --
作者:
Gorbea,CM;Marchand,P;Jiang,W;Copeland,NG;Gilbert,DJ;Jenkins,NA;Bond,JS
通讯作者: Bond,JS
克隆大鼠 meprin cDNA 表明该酶是异二聚体。
DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
作者:
Johnson,GD;Hersh,LB
通讯作者: Hersh,LB