Abstract：
:The biosynthesis of 6(R)-5,6,7,8-tetrahydrobiopterin (BH4) in murine erythroleukemia (MEL) cells is almost completely inhibited by 10 mM, 2,4-diamino-6-hydroxypyrimidine (DAHP), which targets GTP cyclohydrolase. The inhibition results in dephosphorylation of the retinoblastoma gene product, prolongation of the G1-phase in the cell cycle, and subsequent commitment to terminal differentiation of MEL cells. Reversal of the processes by repletion of cellular BH4 with biopterin-related compounds including BH4, 7,8-dihydrobiopterin (7,8-BH2), sepiapterin, and 7,8-dihydroneopterin has generated complicated results. Low micromolar exogenous pterin compounds had little or no effect. At 300 microM or higher, the synthesis of hemoglobin by DAHP-induced MEL cells is significantly inhibited by 7,8-dihydrobiopterin and sepiapterin. However, further cell cycle analysis shows that the inhibition of cell differentiation by 7,8-BH2 and sepiapterin may not be due to the reversal of cell proliferation. Inhibition of BH4 biosynthesis in MEL cells by inhibitors of sepiapterin reductase has also been studied. None of the inhibitors that were tested, including N-chloroacetyl-dopamine and N-acetylserotonin, which are specific for sepiapterin reductase, can block MEL cells in G1-phase or induce the cells to commit to terminal differentiation. Furthermore, inhibitors of sepiapterin reductase are found to reduce or to abolish hemoglobin synthesis in differentiating MEL cells induced by hexamethylene bisacetamide. The mechanism for this is not clear. Not all of the effects caused by the depletion of BH4 synthesis can be rescued by repletion of BH4. These results suggest that BH4 may not regulate proliferation or differentiation of MEL cells as previously thought. Its function in MEL cells is still not clear.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Zhuo S,Fan S,Kaufman Sdoi
10.1006/excr.1996.0021subject
Has Abstractpub_date
1996-01-10 00:00:00pages
163-70issue
1eissn
0014-4827issn
1090-2422pii
S0014-4827(96)90021-Xjournal_volume
222pub_type
杂志文章abstract：:Gold nanoparticles are recently having much attention because of their increased applications in biomedical fields. In this paper, we demonstrated the photothermal efficacy of citrate capped gold nanoparticles (AuNPs) for the destruction of A431 cancer cells. Citrate capped AuNPs were synthesized successfully and char...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2011.04.010
更新日期：2011-08-15 00:00:00
abstract：:In confluent keratinocyte monolayers, desmosomal adhesion gradually becomes calcium-independent and this is associated with an increase in the strength of intercellular adhesion (hyper-adhesion). In this study, we investigated the functional and molecular significance of hyper-adhesion in a system challenged by autoim...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2009.10.005
更新日期：2010-02-15 00:00:00
abstract：:There are numerous mechanisms by which mammals respond to hypoxia. These include acute changes in pulmonary arterial tone due to smooth muscle cell contraction, acute increases in respiration triggered by the carotid body chemosensory cells, and chronic changes such as induction of red blood cell proliferation and ang...
journal_title：Experimental cell research
pub_type： 杂志文章,评审
doi：10.1016/j.yexcr.2017.03.034
更新日期：2017-07-15 00:00:00
abstract：:Sensitivity of tumor cells to treatment with anticancer drugs depends on expression and function of antiapoptotic and antioxidant proteins. The goal of our study was to determine the functional role of the novel antioxidant protein Peroxiredoxin V (PrxV), in protection of human lung carcinoma cell lines against apopto...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2006.05.006
更新日期：2006-09-10 00:00:00
abstract：:The biosynthesis of type XI and type II collagens was examined using a stable rat chondrocyte cell line established by W. E. Horton et al. (1988, Exp. Cell Res. 178, 457-468.). These cells (IRC; immortalized rat chondrocytes) were created by transformation with a murine retrovirus carrying the v-myc and v-raf oncogene...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1994.1169
更新日期：1994-07-01 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：:CIN85 is a multidomain protein that associates with receptors carrying tyrosine kinase domains. Here we report that it is also a component of the signaling complex associated with tumor necrosis factor receptor 1 (TNFR1), which lacks a tyrosine kinase domain. This was established by showing that CIN85 was co-precipita...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2004.11.005
更新日期：2005-03-10 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 growth rate of malignant F9 embryonal carcinoma cells slows considerably following all-trans-retinoic acid-induced differentiation into benign parietal endoderm. To determine the mechanism of this process, we examined the expression of cyclins D1, D2, and D3 and the activity of their associated kinases. Cyclin D1 ...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1999.4664
更新日期：1999-12-15 00:00:00
abstract：:The Golgi apparatus undergoes extensive fragmentation during mitosis in animal cells. Protein kinases play a critical role during fragmentation of the Golgi apparatus. We reported here that Polo-like kinase 3 (Plk3) may be an important mediator during Golgi breakdown. Specifically, Plk3 was concentrated at the Golgi a...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2003.10.022
更新日期：2004-03-10 00:00:00
abstract：:We have previously demonstrated that pretreatment of several cell lines with cis-unsaturated fatty acids, like oleic acid, blocks epidermal growth factor (EGF)-induced early ionic signals, and in particular the [Ca2+]i rise. In the present work we show that this blockade does not alter EGF-stimulated cellular prolifer...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1995.1204
更新日期：1995-07-01 00:00:00
abstract：:Using hybridization in situ with a ribo-probe recognizing transcripts of the chicken alpha A globin gene, we show here that in proliferating AEV-transformed erythroblasts this gene is strongly transcribed, but the corresponding transcripts are retained in the nuclei. Most surprisingly, this globin RNA accumulates in t...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.2001.5332
更新日期：2001-11-01 00:00:00
abstract：:The mechanisms of replicative senescence by telomere shortening are not fully understood. The Indian muntjac has the fewest chromosomes of all mammals, greatly simplifying the analysis of each telomere over time. In this study, telomere shortening was observed throughout the life span of cultured normal muntjac cells ...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.2002.5645
更新日期：2002-11-15 00:00:00
abstract：:The pleiotropic cytokine interleukin (IL)-10 is best characterized by its ability to downregulate inflammation and promote peripheral tolerance. On the other hand, IL-10 was also found to maintain the effector response of CD8+ T cells and promote the expansion of tumor-resident CD8+ T cells. In diffuse large B cell ly...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2017.08.036
更新日期：2017-11-15 00:00:00
abstract：:Protein C23 (also called nucleolin or 100-kDa nucleolar protein) is a major nucleolar phosphoprotein involved in ribosome biogenesis. To determine the effects of protein C23 on preribosomal RNA (pre-rRNA) synthesis anti-C23 antiserum was microinjected into nuclei of Chironomus tentans salivary glands. Transcription wa...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(88)90397-7
更新日期：1988-10-01 00:00:00
abstract：:This study was designed to elucidate the mechanisms involved in elevated cell death arising from an altered endogenous oxidant state. Increased levels of cell death were detected in cells lacking Gpx1 following the addition of exogenous H2O2. This increased apoptosis correlated with a down-regulation in the activation...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2004.07.018
更新日期：2004-11-01 00:00:00
abstract：:Through immunohistochemical studies we have identified the cell-surface proteoglycan, NG2, on blood vessels throughout the rat embryo. The particular cell type expressing this chondroitin sulfate proteoglycan, however, is dependent upon tissue location. Microvessels within the rat CNS express NG2 on endothelial cells,...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1995.1371
更新日期：1995-11-01 00:00:00
abstract：:Hypoxia/reoxygenation (H/R) injury is characterized by microfilament reorganization in cardiomyocytes. Previous studies have shown that myofibrillogenesis regulator-1 (MR-1) is expressed in the myocardium and promotes actin organization in cardiomyocytes. The purpose of this study was to investigate the role of MR-1 i...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2015.05.026
更新日期：2015-10-01 00:00:00
abstract：:Identification of transcription factors expressed by differentiated cells is informative not only of tissue-specific pathways, but to help identify master regulators for cellular reprogramming. If applied, such an approach could generate healthy autologous tissue-specific cells for clinical use where cells from the ho...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2018.05.031
更新日期：2018-08-15 00:00:00
abstract：:Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population and show significant expansion under pathological conditions. microRNA plays important roles in many biological processes, whether microRNAs have a function in the expansion of MDSCs is still not very clear. In this study, miR-34a overexpression c...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2014.04.010
更新日期：2014-08-15 00:00:00
abstract：:The insoluble cytoskeletal material remaining after detergent lysis of 'Normal' Murine Mammary Gland (NMuMG) cells, growing on plastic or collagen gel substrata, was analyzed by two-dimensional gel electrophoresis. The identity of the cytoskeletal elements was determined by their solubility properties, electrophoretic...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(86)90343-5
更新日期：1986-02-01 00:00:00
abstract：:NIH3T3 cells carrying a dominant negative H-ras mutant 116Y acquired resistance to transformation by some PTK oncogenes, i.e., v-fes, v-abl, and v-fms, but were sensitive to viral ras and serine threonine kinase oncogenes, v-raf and v-mos. One clone, designated 1-20, infected with v-fes (1-20 fes) exhibited flat morph...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1993.1263
更新日期：1993-10-01 00:00:00
abstract：:An earlier report indicated that a 26-amino-acid peptide (SA), comprised of the nuclear localization signal (NLS) of fibroblast growth factor-1 (FGF-1) and a membrane-permeable peptide, was able to stimulate DNA synthesis after it was taken up by NIH3T3 fibroblasts. Here, we report that SA, but not a mutant with the N...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1998.4176
更新日期：1998-09-15 00:00:00
abstract：:Micro(mi)RNAs play important and varied roles in tumorigenesis; however, the full repertoire of miRNAs that affect cancer cell growth is not known. In this study, an miRNA library was screened to identify those that affect the growth of A549 tumor cells. Among 300 miRNAs, miR-28-5p, -323-5p, -510-5p, -552-3p, and -608...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/j.yexcr.2015.10.012
更新日期：2015-12-10 00:00:00
abstract：:32D cells grown for 1 year in interleukin-3 (IL-3) and granulocyte colony-stimulating factor (G-CSF) generated the 32D Ro cell line which retained the parental mast cell phenotype but lost ability to generate erythroid cells in response to erythropoietin (EPO). In order to clarify the mechanisms underlying such restri...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/s0014-4827(03)00032-6
更新日期：2003-05-01 00:00:00
abstract：:The rheumatic diseases are characterized by the production of autoantibodies that are usually directed against components of the cell nucleus. In this communication, we describe autoantibodies that recognize DNA topoisomerase II (anti-topoII) present in the serum of a patient with systemic lupus erythematosus. Several...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(89)90067-0
更新日期：1989-02-01 00:00:00
abstract：:When exponentially growing NHIK 3025 cells were shifted from medium containing 30% serum to medium containing 0.03% serum the rate of net protein accumulation was reduced due to both a reduction in the rate of protein synthesis and an increase in the rate of protein degradation. This change in growth conditions increa...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(84)90788-2
更新日期：1984-11-01 00:00:00
abstract：:By a sequential mutation and selection utilizing N-methyl-N'-nitro-N-nitrosoguanidine as a mutagen, we succeeded in separating a poly(ADP ribose) polymerase-defective mutant clone (Cl-3527) from a mouse L1210 cell clone (Cl-3). The enzyme activity per cell in Cl-3527 cells was only 8% of that in wild type L1210 (CCL 2...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/s0014-4827(05)80080-1
更新日期：1992-05-01 00:00:00
abstract：:At Day 17 of in ovo development, chondrocyte hypertrophy including synthesis of collagen X takes place in a limited region within the cranial part of chick embryo sternum. Here we analyze in suspension culture the differences in response to single growth factors of chondrocytes derived from the cranial part versus cel...
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1006/excr.1995.1024
更新日期：1995-01-01 00:00:00
abstract：:A method for the in vitro perfusion of isolated guinea-pig mammary tissue is described that allows the radiolabelling of secretory and membrane proteins. Glands were depleted of methionine, labelled with [35S]methionine for 5 min and perfused with medium containing an excess of unlabelled methionine for varying times....
journal_title：Experimental cell research
pub_type： 杂志文章
doi：10.1016/0014-4827(84)90369-0
更新日期：1984-03-01 00:00:00
