Abstract:
:Matrix metalloproteinase-1 (MMP-1) is one of only a few enzymes with the ability to degrade the stromal collagens (types I and III) at neutral pH, and high expression of MMP-1 has been associated with aggressive and invasive cancers. We recently reported a single nucleotide insertion/deletion polymorphism (SNP) in the collagenase-1 (MMP-1) promoter (Rutter et al. [1998] Can. Res. 58:5321-5325), where the insertion of an extra guanine (G) at -1607 bp creates the sequence, 5'-GGAA-3 (2G allele), compared to the sequence 5'-GAA-3' (1G allele). The presence of 2G constitutes a binding site for the ETS family of transcription factors, and increases MMP-1 transcription in fibroblasts and A2058 melanoma cells cultured in vitro. In addition, the presence of the 2G allele has been linked to several aggressive malignancies as well as to enhanced expression of MMP-1. In this study, we describe a melanoma cell line, VMM5, that is 1G homozygous, but that is invasive and expresses high levels of MMP-1 constitutively. The high level of MMP-1 expression in VMM5 cells is due to the utilization of both the p38 and ERK1/2 transduction pathways. In contrast, in the A2058 cell line, which also expresses MMP-1 constitutively and which is 2G homozygous, only the ERK pathway is activated. Thus, our data suggest that in the absence of 2G allele and in the presence of the appropriate transcription factors, tumor cells may use alternative signal/transduction pathways and cis-acting sequences to achieve high levels of MMP-1 expression, which contribute to the ability of tumor cells to invade, regardless of their genotype.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Benbow U,Tower GB,Wyatt CA,Buttice G,Brinckerhoff CEdoi
10.1002/jcb.10225subject
Has Abstractpub_date
2002-01-01 00:00:00pages
307-19issue
2eissn
0730-2312issn
1097-4644journal_volume
86pub_type
杂志文章abstract::A wide variety of environmental stimuli induce the expression of stress response genes, including high temperatures, hypoxia, heavy metal ions, and amino acid analogs. Stress genes are also induced by low frequency magnetic fields. The cellular response to magnetic fields is activated by unusually weak stimuli, and in...
journal_title:Journal of cellular biochemistry
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abstract::Active nucleo-cytoplasmic transport is mediated by dynamic signal-mediated pathways. We investigated the effects of transcription inhibitors or fluorescent lectins on nuclear import mediated by nuclear localization signals (NLSs). Therefore, a novel experimental approach that allows the controlled sequential introduct...
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abstract::Since claudin-18 (Cldn18) is overexpressed in precursor lesion PanIN and pancreatic duct carcinoma, it serves as a diagnostic marker and a target of immunotherapy. The stomach isoform of Cldn18, Cldn18a2 is regulated via a PKC/MAPK/AP-1-dependent pathway in PKC activator 12-O-tetradecanoylphorbol 13-acetate (TPA)-stim...
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abstract::Ceruloplasmin (CP) is essential for brain iron homeostasis. However, its precise function in brain iron transport has not been definitely determined. In this study, we investigated the effects of soluble CP on iron influx and efflux in primary neuronal culture from the midbrain (the substantia nigra and striatum) and ...
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journal_title:Journal of cellular biochemistry
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doi:10.1002/(sici)1097-4644(19960101)60:1<107::aid-jcb
更新日期:1996-01-01 00:00:00
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doi:10.1002/jcb.21359
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abstract::Estrogen and androgen are both critical for the maintenance of bone, but the target cells, mechanisms, and responses could be sex-specific. To compare sex-specific actions of estrogen and androgen on osteoclasts, human peripheral blood mononuclear precursor cells from adult Caucasian males (n = 3) and females (n = 3) ...
journal_title:Journal of cellular biochemistry
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abstract::Lupus nephritis (LN) is a common and severe complication of systemic lupus erythematosus. Without intervention, LN may cause acute kidney injury and end-stage renal disease. This study aims to determine whether microRNA-485 (miR-485) affects renal tubular epithelial cells (RTECs) in LN mice via the TGF-β-MAPK signalin...
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abstract:BACKGROUND:Long noncoding RNA (lncRNA) is emerging as a vital regulator in various cancers. Recently, it was found that lncRNA colorectal neoplasia differentially expressed (CRNDE) plays an oncogenic role, promoting cell proliferation and migration in hepatocellular carcinoma (HCC). However, the underlying regulatory m...
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abstract::We report here that the antiestrogen tamoxifen (TAM) induces cell death in human breast cancer cell line MCF-7. We assessed the type of cell death induced by TAM in this breast cancer cell line on the basis of morphological and biochemical characteristics. Dying cells showed morphological characteristics of apoptosis,...
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