Abstract：
:The rate-limiting step in melanogenesis is catalyzed by tyrosinase, a multifunctional enzyme encoded by the albino locus. We have previously reported that depletion of protein kinase C by long-term treatment of B16 mouse melanoma cells with phorbol dibutyrate (PDBu) prevented cell density-dependent melanogenesis. This was accompanied by a lack of induction of tyrosinase protein and mRNA. We report here the effect of PDBu on the functional activity of the mouse tyrosinase promoter by reporter gene assay and its effect on the binding of nuclear proteins from B16 cells to the "M-box" region of the mouse tyrosinase promoter. Short-term PDBu treatment of B16 cells transfected with a mouse tyrosinase promoter-luciferase construct resulted in increased reporter gene activity, while long-term PDBu treatment inhibited reporter gene activity. Using an oligonucleotide containing the M-box and its flanking residues in electrophoretic mobility shift assays, we found a density-dependent change in the pattern of DNA-protein complexes. One complex was found to be negatively regulated by long-term PDBu treatment. Competition experiments with various mutated oligonucleotides demonstrated that both the M-box and flanking residues are important for nuclear protein binding. The complex whose formation was inhibited by long-term PDBu treatment was shown to contain the basic helix-loop-helix leucine zipper protein microphthalmia-associated transcription factor (MITF). These results suggest that chronic PDBu treatment might inhibit tyrosinase expression (and subsequent melanogenesis) by affecting the amount or function of MITF.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Mahalingam H,Watanabe A,Tachibana M,Niles RMdoi
10.1006/excr.1997.3773subject
Has Abstractpub_date
1997-11-25 00:00:00pages
83-92issue
1eissn
0014-4827issn
1090-2422pii
S0014-4827(97)93773-3journal_volume
237pub_type
杂志文章abstract：:The effect of SK&F 96365 (1-(beta-[3-(4-methoxyphenyl)propoxyl]-4- methoxyphenethyl)-1H-imidazole hydrochloride), a recently synthesized inhibitor of receptor-mediated calcium entry, was investigated on human hematopoietic cell lines. We found that treatment of the T-cell leukemia line Jurkat with SK&F 96365 inhibited...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(92)90103-f
更新日期：1992-10-01 00:00:00
abstract：:Regions of heterochromatin are often found at the periphery of the mammalian nucleus, juxtaposed to the nuclear lamina. Genes in these regions are likely maintained in a transcriptionally silent state, although other locations at the nuclear periphery associated with nuclear pores are sites of active transcription. As...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2009.01.003
更新日期：2009-04-01 00:00:00
abstract：:The stimulatory heterotrimeric Gs protein alpha subunit (Gsα) is a ubiquitous guanine nucleotide-binding protein that regulates the intracellular cAMP signaling pathway and consequently participates in a wide range of biological events. In the reproductive system, despite Gsα being associated with oocyte meiotic arres...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2018.07.023
更新日期：2018-09-15 00:00:00
abstract：:The ocular surface shares many characteristics with mucosal surfaces. In both, healing is regulated by peptide growth factors, cytokines, and extracellular matrix proteins. However, these factors are not sufficient to ensure most rapid healing. Trefoil peptides are abundantly expressed epithelial cell products which e...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.2000.5116
更新日期：2001-04-01 00:00:00
abstract：:In this study, we demonstrate the protective effects of Cycloartenyl ferulate (CF) against Paraquat (PQ)-induced cytotoxicity and elucidate the underlying molecular mechanisms. The results show that, CF could reverse the PQ-induced growth inhibition and release of lactate dehydrogenase in HK-2 human proximal tubular c...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2013.08.005
更新日期：2013-11-01 00:00:00
abstract：:Recent reports suggest that several viruses, besides human immunodeficiency virus, induce apoptosis in infected cells. We report here that Sendai virus or Herpes simplex virus type 1 (HSV-1), two potent inducers of interferon-alpha, caused cell death in a consistent number of human peripheral blood mononuclear cells. ...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1995.1131
更新日期：1995-05-01 00:00:00
abstract：:The existing cytometric methodologies do not allow one to directly correlate, within the same cells, functional cell attributes that are revealed supravitally with features that require cell fixation to be detected or measured. Taking advantage of the "file merge" feature of the laser-scanning cytometer, we have been ...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1999.4525
更新日期：1999-06-15 00:00:00
abstract：:A single cell of wild-type Dictyostelium discoideum forms a visible colony on a plastic dish in several days, but due to enhanced cell migration, amiB-null mutant cells scatter over a large area and do not form noticeable colonies. Here, with an aim to identify genes involved in cell migration, we isolated suppresser ...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2007.12.002
更新日期：2008-03-10 00:00:00
abstract：:Hypopharyngeal squamous cell carcinoma (HSCC) is a relatively rare malignancy and has the worst prognosis among head and neck cancer. Metastasis is the major cause of poor prognosis in HSCC patients. In this study, we found that 3-phosphoinositide-dependent protein kinase 1 (PDK1 or PDPK1) was overexpressed in HSCC. T...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2019.111746
更新日期：2020-01-15 00:00:00
abstract：:To investigate the involvement of proteases in apoptosis, rat thymocytes were treated with the glucocorticoid hormone methylprednisolone or the topoisomerase II inhibitor etoposide in the presence of selective substrate inhibitors of either interleukin-1 beta-converting enzyme (ICE), (Z-Val-Ala-Asp-chloromethylketone,...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1995.1391
更新日期：1995-12-01 00:00:00
abstract：:A monoclonal antibody Pr-28 was prepared, which recognized an antigen present only in proliferating cells. Immunofluorescence analysis of Pr-28 antigen showed that the antigen was localized mainly in perinuclear cytoplasm. Although Pr-28 antibody was produced against a chicken cell antigen, it reacts not only with chi...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(87)90312-0
更新日期：1987-06-01 00:00:00
abstract：:Xenopus early embryos are transcriptionally quiescent until the midblastula transition (MBT). We have examined the question of whether the absence of rRNA synthesis is related to a deficiency in the RNA polymerase I (pol I) transcription machinery. Previously we have demonstrated that the maternally provided pol I tra...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1999.4411
更新日期：1999-04-10 00:00:00
abstract：:In a previous study we have shown that triiodothyronine (T3) added to a serum-free medium supplemented with insulin, transferrin, and selenous acid (ITS) can stimulate Caco-2 cell differentiation. In this study we have focused on the effects of T3 on sucrase activity. The results obtained demonstrate that T3 (50 nM) d...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1996.0041
更新日期：1996-02-01 00:00:00
abstract：:To study the potential use of optical forces to manipulate chromosome movement, we have used a Nd:YAG laser at a wavelength of 1.06 microns focused into a phase contrast microscope. Metaphase and anaphase chromosomes were exposed while being monitored by video microscopy. The results indicated that when optical forces...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(91)90475-a
更新日期：1991-11-01 00:00:00
abstract：:We studied the guidance and activation of macrophages from the P388D1 cell line and rat peritoneum by topographic features on a nanometric scale. Cells were plated on plain fused silica substrata or substrata with microfabricated grooves and steps, 30-282 nm deep. The contact of cells with the patterned surface activa...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1996.0098
更新日期：1996-03-15 00:00:00
abstract：:Pitx2 is a bicoid-related homeobox transcription factor implicated in regulating left-right patterning and organogenesis. However, only a limited number of Pitx2 downstream target genes have been identified and characterized. Here we demonstrate that Pitx2 is a transcriptional repressor of DEP domain containing 1B (DE...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2015.02.008
更新日期：2015-04-10 00:00:00
abstract：:When micromeres isolated from the 16-cell stage of Strongylocentrotus purpuratus are cultured in sea water containing 3.5% horse serum, they produce spicules at approximately the same time as in normal development. The serum requirement of the micromeres has been investigated by adding serum at varying intervals after...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(83)90355-5
更新日期：1983-12-01 00:00:00
abstract：:We present the first evidence that secretory organelle docking at the cell membrane can be reversed in vivo. In nondischarge (nd) mutants of Paramecium tetraurelia all trichocysts can be detached from the cell surface within 2-3 h by different means, including cytochalasin B (but not D), high cell density, or Ca2+ ion...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(90)90013-z
更新日期：1990-12-01 00:00:00
abstract：:The process of DNA synthesis in normal and endoreduplicating mammalian cells are very similar. Both types of chromosomes are replicated in defined units termed chromosomal replicons, and in the same sequences along their lengths. The sister chromosomes of the diplochromosomes are replicated synchronously in identical ...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(83)90148-9
更新日期：1983-07-01 00:00:00
abstract：:Time-lapse microcinematography was used to trace the migration and subsequent fate of daughter pairs from single myogenic stem cells. The generation times of siblings which divide are closely correlated (r, 0.73) compared with randomly selected cells (r, 0.059), suggesting the more or less equal partition of stem cell...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(86)90204-1
更新日期：1986-11-01 00:00:00
abstract：:Mesenchymal stem cells (MSCs) are non-immunogenic, multipotent cells with at least trilineage differentiation potential. They promote wound healing, improve regeneration of injured tissue, and mediate numerous other health effects. MSCs migrate to sites of injury and stimulate repair either through direct differentiat...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2015.08.019
更新日期：2015-10-15 00:00:00
abstract：:Synthetic tubugis are equally potent but more stable than their natural forms. Their anticancer potential was estimated on a solid melanoma in vitro and in vivo. Tubugi-1 induced the apoptosis in B16 cells accompanied with strong intracellular production of reactive species, subsequently imposing glutathione and thiol...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2019.04.028
更新日期：2019-07-15 00:00:00
abstract：:We had earlier demonstrated that a 46-kDa glycoprotein is involved in the differentiation of rat skeletal myoblasts. We now show that the binding of this glycoprotein to collagen and gelatin is disrupted by Arg-Gly-Asp (RGD) containing peptide but not by Arg-Gly-Glu (RGE). The former peptide also selectively elutes th...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(88)90368-0
更新日期：1988-11-01 00:00:00
abstract：:Spinal muscular atrophy (SMA), a recessive, neuromuscular disease, is caused by a mutation or deletion in the SMN1 gene. The SMN2 gene is present in the same region of chromosome 5 and is similar in DNA sequence to SMN1 except for a T at position +6 of exon 7 that is likely the predominant functional difference betwee...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2007.10.012
更新日期：2008-02-15 00:00:00
abstract：:3-phosphoinositide-dependent kinase-1 (PDK1) phosphorylates and activates several kinases in the cAMP-dependent, cGMP-dependent and protein kinase C (AGC) family. Many putative PDK1 substrates have been identified, but have not been analyzed following transient and specific inhibition of PDK1 activity. Here, we demons...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2008.04.006
更新日期：2008-07-01 00:00:00
abstract：:The distribution and organisation of F-actin during the cell cycle of meristematic root-tip cells of Allium was investigated using a rhodamine-labelled phalloidin to stain F-actin in isolated cell preparations. Such preparations could, in addition, be stained for tubulin by immunofluorescence, enabling a comparison be...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(85)90277-0
更新日期：1985-01-01 00:00:00
abstract：:The androgen receptor (AR) plays critical roles in human prostate carcinoma progression and transformation. However, the activation of AR is regulated by co-regulators. MEIS1 protein, the homeodomain transcription factor, exhibited a decreased level in poor-prognosis prostate tumors. In this study, we investigated a p...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2014.08.023
更新日期：2014-10-15 00:00:00
abstract：BACKGROUND:Esophageal fibrosis is a complication of eosinophilic esophagitis (EoE) which has been attributed to both subepithelial fibrosis and to epithelial to mesenchymal transition (EMT), a process by which epithelial cells acquire mesenchymal features. Common to both causes of EoE-fibrosis is the notion that granul...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2012.12.002
更新日期：2013-04-01 00:00:00
abstract：:Two genes, KIN1 and KIN2, were isolated in Saccharomyces cerevisiae by their homology to the protein kinase family of viral oncogenes. In previous studies, we identified the yeast KIN1 gene product (pp145KIN1) and KIN2 gene product (pp145KIN2) as 145 kDa phosphoproteins with serine/threonine protein kinase activity. W...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1994.1177
更新日期：1994-07-01 00:00:00
abstract：:In many animals, the germ line develops from a distinct mitochondria-rich region of embryonic cytoplasm called the germ plasm. However, the protein composition of germ plasm and its formation remain poorly understood, except in Drosophila. Here, we show that Xpat, a recently identified protein component of Xenopus ger...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2007.10.019
更新日期：2008-02-01 00:00:00
