Abstract:
:During stress, the mammalian small heat shock protein Hsp27 enters cell nuclei. The present study examines the requirements for entry of Hsp27 into nuclei of normal rat kidney (NRK) renal epithelial cells, and for its interactions with specific nuclear structures. We find that phosphorylation of Hsp27 is necessary for the efficient entry into nuclei during heat shock but not sufficient for efficient nuclear entry under control conditions. We further report that Hsp27 is recruited to an RNAse sensitive fraction of SC35 positive nuclear speckles, but not other intranuclear structures, in response to heat shock. Intriguingly, Hsp27 phosphorylation, in the absence of stress, is sufficient for recruitment to speckles found in post-anaphase stage mitotic cells. Additionally, pseudophosphorylated Hsp27 fused to a nuclear localization peptide (NLS) is recruited to nuclear speckles in unstressed interphase cells, but wildtype and nonphosphorylatable Hsp27 NLS fusion proteins are not. The expression of NLS-Hsp27 mutants does not enhance colony forming abilities of cells subjected to severe heat shock, but does regulate nuclear speckle morphology. These data demonstrate that phosphorylation, but not stress, mediates Hsp27 recruitment to an RNAse soluble fraction of nuclear speckles and support a site-specific role for Hsp27 within the nucleus.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Bryantsev AL,Chechenova MB,Shelden EAdoi
10.1016/j.yexcr.2006.10.004subject
Has Abstractpub_date
2007-01-01 00:00:00pages
195-209issue
1eissn
0014-4827issn
1090-2422pii
S0014-4827(06)00422-8journal_volume
313pub_type
杂志文章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::SV40-transformation as well as treatment with tumor promoters produce alterations in morphology, differentiation and keratinization of human keratinocytes. Two cell lines of SV40-transformed keratinocytes and primary cultures of keratinocytes treated with the tumor promoter 12-O-tetradecanoyl phorbol-13-acetate (TPA) ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(84)90692-x
更新日期:1984-09-01 00:00:00
abstract::The expressions of the protooncogenes c-jun and jun D have been investigated in dog thyrocytes in a primary culture whose proliferation is stimulated by three distinct intracellular signaling pathways (1) the thyrotropin (TSH) or forskolin-cyclic-AMP-mediated cascade; (2) the protein kinase C pathway activated by diac...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(91)90253-q
更新日期:1991-10-01 00:00:00
abstract::Transfection of primary rat keratinocytes with the polyomavirus large T gene promotes the establishment of cell lines. The keratinocytes express the large T protein and can be continuously cultured in medium containing a low concentration of calcium. The immortalized keratinocytes retain the ability to differentiate w...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(88)90042-0
更新日期:1988-07-01 00:00:00
abstract::Endocytosis and transport of bovine liver β-glucuronidase to lysosomes in human fibroblasts are mediated by two receptors: the well-characterized cation-independent mannose 6-phosphate receptor (IGF-II/Man6PR) and an IGF-II/Man6PR-independent receptor, which recognizes a Ser-Trp*-Ser sequence present on the ligand. Th...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2011.05.025
更新日期:2011-10-01 00:00:00
abstract::Blood vessels are one of the major routes for the dissemination of cancer cells. Malignant tumors release growth factors such as vascular endothelial growth factor(VEGF) to induce angiogenesis, thereby promoting metastasis. Here, we report that The Drosophila Eyes Absent Homologue 1 (EYA1), which is overexpressed in c...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2018.02.028
更新日期:2018-06-01 00:00:00
abstract::We have partially purified a specific cyclin B2 kinase (cyk) from prophase oocytes of Xenopus laevis after an ATP-gamma-S activation step. Phosphopeptide analysis identified Ser53 as the major in vitro phosphorylation site for cyk in cyclin B2. Using a synthetic peptide derived from cyclin B2 encompassing Ser53 (cykti...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1996.3436
更新日期:1997-02-01 00:00:00
abstract::Patients infected with human immunodeficiency virus type 1 (HIV-1) develop a spectrum of B cell lymphoproliferative disorders ranging from polyclonal B cell activation to B cell lymphomas. While a direct role of Epstein-Barr virus (EBV) is well recognized for most of these lesions, recent findings have suggested that ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2004.01.018
更新日期:2004-05-01 00:00:00
abstract::Human T-cell leukemia/lymphotropic virus type I (HTLV-I) infection causes a variety of human diseases, including adult T-cell leukemia/lymphoma. The viral transactivator Tax has been implicated as a key factor in the HTLV-I-induced transformation pathway. To investigate the components of this pathway, we derived fibro...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1998.4381
更新日期:1999-03-15 00:00:00
abstract::In Caenorhabditis elegans embryogenesis, phosphorylation events are critical to chromosomal changes. To investigate the dephosphorylation of chromosome behavior, we cloned and characterized the cDNA that encodes C. elegans protein phosphatase type 1 (CeGLC-7 beta), which is composed of 333 amino acids. CeGLC-7 beta po...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/s0014-4827(03)00157-5
更新日期:2003-07-15 00:00:00
abstract::The movement of a cell through the sequential phases of apoptosis is accompanied by a progressive decrease in cell size with loss in protein mass. In lymphocytes from Hiv-infected persons, protein loss during apoptosis is due to increased protein degradation rather than decreased synthesis. To identify and characteriz...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1999.4410
更新日期:1999-05-01 00:00:00
abstract::Advanced glycation end-products (AGEs) are proteins/lipids that are glycated upon sugar exposure and are often increased during inflammatory diseases such as osteoarthritis and neurodegenerative disorders. Here, we developed an extracellular matrix (ECM) using glycated type I collagen (ECM-GC), which produced similar ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2019.06.020
更新日期:2019-09-15 00:00:00
abstract::Arterial medial calcification (AMC) is the deposition of calcium phosphate mineral, often as hydroxyapatite, in the medial layer of the arteries. AMC shares some similarities to skeletal mineralisation and has been associated with the transdifferentiation of vascular smooth muscle cells (VSMCs) towards an osteoblast-l...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2019.04.020
更新日期:2019-07-01 00:00:00
abstract::Human lacrimal gland biopsies were serially incubated in chelating and enzymatic solutions. Viable single cells were evaluated for outgrowth in growth factor enriched medium using the following culture substrates: Matrigel, Type I collagen gel with or without fibroblasts, and plastic. Each epithelial outgrowth was cha...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1995.1300
更新日期:1995-09-01 00:00:00
abstract::Melanotransferrin is a glycoprotein expressed at the cell membrane and secreted in the extracellular environment. Recombinant truncated form of membrane-bound melanotransferrin (sMTf) was reported to exert in vitro anti-angiogenic properties. Here we show that sMTf treatment leads to a 50% inhibition of neovasculariza...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2007.04.013
更新日期:2007-08-01 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::We describe a novel human bronchial epithelial cell line immortalized after transfection with the E6 and E7 genes of human papillomavirus type 16. The established HBE4-E6/E7 cell line resembles morphologically the basal cells of the normal human bronchial epithelium and is nontumorigenic. A clonal isolate proved to be...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1994.1115
更新日期:1994-05-01 00:00:00
abstract::Peripheral neuroblastic tumors exist as a heterogeneous mixture of neuroblastic (N-type) cells and Schwannian stromal (S-type) cells. These stromal cells not only represent a differentiated and less aggressive fraction of the tumor, but also have properties that can influence the further differentiation of nearby mali...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2012.12.027
更新日期:2013-03-10 00:00:00
abstract::Nuclear factor kappa B (NF-κB) is a ubiquitous transcription factor which controls the expression of various genes involved in immune responses. However, it is not clear whether NF-κB activation is critical for phagocytosis when Staphylococcus aureus is the pathogen. Using oligonucleotide microarrays, we investigated ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2014.04.018
更新日期:2014-10-01 00:00:00
abstract::Wnt1 and -5a have been shown to modulate the proliferation and differentiation of midbrain dopaminergic (DA) neurons. However, it is not known whether other Wnts or which Frizzled (Fz) receptors are expressed in the developing midbrain. We found that 13 out of 19 Wnts, all 10 Fzs, and several intracellular Wnt signali...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2006.01.032
更新日期:2006-05-15 00:00:00
abstract::Since the migration of human fetal skin fibroblasts into a denuded area of a cell monolayer has been demonstrated to be serum-independent (fetal phenotype), whereas that of adult-donor skin fibroblasts is serum-dependent (adult phenotype), a study was carried out to determine at which life stage the fetal-adult phenot...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1995.1342
更新日期:1995-10-01 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::Nucleoporins (Nups) are a large and diverse family of proteins that mediate nucleocytoplasmic transport at interphase of vertebrate cells. Nups also function in mitosis progression. However, whether Nups are involved in oocyte meiosis progression is still rarely known. In this study, we delineated the roles and regula...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2018.09.004
更新日期:2018-10-15 00:00:00
abstract::To gain insight into the role of the endothelial cell during the pathophysiology of the angiogenic response, investigators have isolated micro- and macrovascular endothelial cells from a wide range of both animal and human vessels, including the umbilical vein. Human umbilical vein endothelial cells (HUVECs) isolated ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1996.0168
更新日期:1996-05-25 00:00:00
abstract::The endothelial cell lining of blood vessels is now recognized as an active interface between blood and the underlying tissue. Modulation of cholesterol levels in several cell types has resulted in altered cell function. We have removed cholesterol from the endothelial cell membrane and have observed corresponding alt...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(91)90548-9
更新日期:1991-03-01 00:00:00
abstract::Epidermal growth factor (EGF) has been shown to be a potent mitogen for epidermal cells both in vitro and in vivo, thus contributing to the development of an organism. It has recently become clear that peroxisome proliferator-activated receptor-beta/delta (PPARbeta/delta) expression and activation is involved in the c...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2008.06.013
更新日期:2008-10-15 00:00:00
abstract::Hyperglycemia is a primary factor that disturbs podocyte function in the glomerular filtration process; this disturbance leads to the development of diabetic nephropathy, and ultimately, renal failure. Podocyte function may also be altered by biological agents that modify protein kinase activity, including the cGMP-ac...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2013.09.005
更新日期:2014-01-01 00:00:00
abstract::The replication kinetics and cytological changes of normal human oral keratinocytes (NHOK) isolated from the basal surface of oral epithelial sheet and cultured as dispersed cells in low (0.15 mM) Ca(2+) medium without serum were analyzed. Replicating NHOK were quantitated by cell count and identified by [(3)H]thymidi...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.2000.4943
更新日期:2000-08-01 00:00:00
abstract::Using L1210 murine leukemia cells, we have previously shown that in response to treatment with drugs having different targets, apoptotic cell death occurs through at least two different signaling pathways. Here, we present evidence that nuclear extracts from staurosporine-treated cells elicit DNase II activity that is...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1999.4737
更新日期:2000-01-10 00:00:00
abstract::In the naturally synchronous mitosis of the syncytial plasmodium of Physarum polycephalum, the nucleolus disintegrates in prophase, releasing a large amount of ribosomal RNA. Using biotinylated rDNA probes, we studied by high-resolution in situ hybridization the behavior of this nucleolar RNA throughout mitosis. Our r...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1993.1274
更新日期:1993-10-01 00:00:00