Cholesterol oxides mediated changes in cytoskeletal organisation involves Rho GTPases.

Abstract:

:The small GTPases Rho, Rac, and Cdc42 regulate the actin cytoskeleton in all eukaryotic cells. In this study we have evaluated the effect of cholesterol oxides (7-ketocholesterol and 25-hydroxycholesterol) on cell migration, cell adhesion, and cytoskeletal organisation of lens epithelial cells (LEC). Effects of cholesterol oxides on cytoskeleton were evaluated by immunofluorescence confocal microscopy. The 7-ketocholesterol induced cell arborisation, with bundling of vimentin and tubulin in the cell processes and formation of filopodia and stress fibres. Cells treated with 25-hydroxycholesterol showed a collapse of vimentin filaments towards the nucleus and formation of lamellipodia. In addition, cells treated with 7-ketocholesterol or 25-hydroxycholesterol showed decreased migration. The effects of cholesterol oxides on cytoskeletal proteins involve the activation of the small GTPases Rho, Rac, and Cdc42. Indeed, formation of both filopodia and stress fibres induced by 7-ketocholesterol is inhibited by overexpressing dominant negatives forms of Cdc42 and RhoA, respectively. Similarly, the collapse of vimentin intermediate filament network and the formation of lamellipodia, induced by 25-hydroxycholesterol, is inhibited by overexpressing dominant negatives forms of Rac1. The effects of cholesterol oxides described in this study for LEC are also observed for at least two other cell lines (H36CE and U373), suggesting that this may represent a general mechanism whereby cholesterol oxides induces cytoskeletal disorganisation.

journal_name

Exp Cell Res

authors

Girão H,Pereira P,Ramalho J,Quinlan R,Prescott A

doi

10.1016/j.yexcr.2003.08.002

keywords:

subject

Has Abstract

pub_date

2003-12-10 00:00:00

pages

502-13

issue

2

eissn

0014-4827

issn

1090-2422

pii

S0014482703004348

journal_volume

291

pub_type

杂志文章
  • Involvement of cyclic GMP in the fusion of chick embryonic myoblasts in culture.

    abstract::We found that a transient rise in cGMP levels, which was closely associated with the Ca2+ influx, occurred concomitant with the onset of myoblast fusion. The Ca2+ channel blocker D600 decreased both the cell fusion and the normal rise in cGMP levels. In contrast, the Ca2+ ionophore A23187 transiently increased cGMP le...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(92)90470-s

    authors: Choi SW,Baek MY,Kang MS

    更新日期:1992-03-01 00:00:00

  • Regulation of ciliary beat frequency by the nitric oxide signaling pathway in mouse nasal and tracheal epithelial cells.

    abstract:OBJECTIVES:Our purpose was to investigate the role of the nitric oxide (NO) signaling pathway in the regulation of ciliary beat frequency (CBF) in mouse nasal and tracheal epithelial cells. METHODS:We studied the effects of the NO donor l-arginine (L-Arg) and specific inhibitors of the NO signaling pathway on CBF of b...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2011.07.007

    authors: Jiao J,Wang H,Lou W,Jin S,Fan E,Li Y,Han D,Zhang L

    更新日期:2011-10-15 00:00:00

  • The antioxidant, rather than prooxidant, activities of quercetin on normal cells: quercetin protects mouse thymocytes from glucose oxidase-mediated apoptosis.

    abstract::The bioflavonoid quercetin is a dietary anticancer chemical that is capable of inducing apoptosis in tumor cells. Although the activity of quercetin is believed to be due to its antioxidative properties, it has recently been suggested that quercetin also has prooxidant activities, which might effect cytotoxicity direc...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/s0014-4827(03)00410-5

    authors: Lee JC,Kim J,Park JK,Chung GH,Jang YS

    更新日期:2003-12-10 00:00:00

  • Absence of the Shb gene in mixed-lineage leukemia MLL-AF9 cells increases latency in mice despite higher proliferation rates in vitro.

    abstract::Mixed lineage leukemia (MLL) arises from several KMT2A-gene chromosomal translocations. Shb gene deficiency has been found to exhibit pleiotropic effects in different models of leukemia, and consequently, this study aimed to investigate MLL-AF9-induced leukemia in Shb deficiency. Bone marrow cells from wild type and S...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2020.112368

    authors: Jamalpour M,Bergquist E,Welsh M

    更新日期:2020-12-15 00:00:00

  • Conjugation in the ciliate Euplotes octocarinatus: comparison of ciliary and cell body-associated glycoconjugates of non-mating-competent, mating-competent, and conjugating cells.

    abstract::Pair formation in the hypotrichous ciliate Euplotes octocarinatus is a poorly understood phenomenon. In order to obtain information about the molecules involved in this process, we compared ciliary and cell body-associated glycoconjugates of non-mating-competent, mating-competent, and conjugating cells. Detection of g...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1995.1114

    authors: Plümper E,Freiburg M,Heckmann K

    更新日期:1995-04-01 00:00:00

  • Oxysterol-binding protein-related protein (ORP) 6 localizes to the ER and ER-plasma membrane contact sites and is involved in the turnover of PI4P in cerebellar granule neurons.

    abstract::Oxysterol-binding protein (OSBP)-related proteins (ORPs) are conserved lipid binding proteins found in organisms ranging from yeast to mammals. Recent findings have indicated that these proteins mainly localize to contact sites of 2 different membranous organelles. ORP6, a member of the ORP subfamily III, is one of th...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2018.07.025

    authors: Mochizuki S,Miki H,Zhou R,Kido Y,Nishimura W,Kikuchi M,Noda Y

    更新日期:2018-09-15 00:00:00

  • Target proteins for arginine-specific mono(ADP-ribosyl) transferase in membrane fractions from chick skeletal muscle cells.

    abstract::In a previous study, we found that a specific inhibitor of cellular arginine-specific mono(ADP-ribosyl) transferase, meta-iodobenzylguanidine (MIBG), reversibly inhibited both proliferation and differentiation of cultured embryonic chick primary muscle myoblasts. In addition, we observed that arginine-specific ADP-rib...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1996.0213

    authors: Huang HY,Zhou H,Huiatt TW,Graves DJ

    更新日期:1996-07-10 00:00:00

  • In vivo interference of paromomycin with mitochondrial activity of Leishmania.

    abstract::Paromomycin is an aminocyclitol aminoglycoside antibiotic used for the treatment of leishmaniasis. In view of the central role of mitochondria in cellular energetics and metabolism, its effect on in vivo mitochondrial activities of Leishmania donovani promastigotes-the parasite flagellate form-was investigated. The ap...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1997.3500

    authors: Maarouf M,de Kouchkovsky Y,Brown S,Petit PX,Robert-Gero M

    更新日期:1997-05-01 00:00:00

  • Lactate production and amino acid incorporation in interleukin 3-dependent, factor-deprived hemopoietic murine cell lines.

    abstract::Interleukin 3 (IL-3) stimulates the growth of various types of hemopoietic progenitors. In vitro, survival of a series of murine cell lines derived from either neoplastic or nonneoplastic hemopoietic tissue shows a strict IL-3 dependence. In order to test the implication of energy metabolism in this dependence as clai...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(90)90182-a

    authors: Reisbach G,Ellwart J,Dörmer P

    更新日期:1990-10-01 00:00:00

  • Altered sensitivity to retinoid-induced apoptosis associated with changes in the subcellular distribution of Bcl-2.

    abstract::In the acute promyelocytic leukemia cell line NB4, Bcl-2 downregulation occurred as a late event of retinoid-induced differentiation. In the maturation-resistant NB4-R1 subclone, retinoids failed to downregulate Bcl-2 even in the situation of apoptosis massively induced by pan-agonists and RXR-selective agonists. We o...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1997.3594

    authors: Bruel A,Karsenty E,Schmid M,McDonnell TJ,Lanotte M

    更新日期:1997-06-15 00:00:00

  • Identification of the type-B receptor for platelet-derived growth factor in human embryonal carcinoma cells.

    abstract::The human embryonal carcinoma (EC) cell line Tera 2 clone 13 (T2/13) can be induced to differentiate in vitro into neuroectodermal cell types with retinoic acid. Undifferentiated cells are characterized by rapid proliferation, whereas differentiated cells show a prolonged generation time, have a limited life span, and...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(90)90312-x

    authors: Weima SM,van Rooijen MA,Mummery CL,Feyen A,de Laat SW,van Zoelen EJ

    更新日期:1990-02-01 00:00:00

  • Glucocorticoid hormones may partially substitute for adenovirus E1A in cooperation with ras.

    abstract::The effects of hormonal promotion of T24-ras oncogene-transfected rat embryo fibroblasts (REF) were compared to cotransformation of these cells with adenovirus E1A and ras. Cotransfection of E1A + ras resulted in the appearance of morphologically transformed cells which were very efficiently established into cell line...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(91)90126-f

    authors: Marshall H,Martens I,Svensson C,Akusjärvi G,Linder S

    更新日期:1991-05-01 00:00:00

  • Dynamics of mutated GFAP aggregates revealed by real-time imaging of an astrocyte model of Alexander disease.

    abstract::Alexander disease (AxD) is a rare neurodegenerative disorder characterized by large cytoplasmic aggregates in astrocytes and myelin abnormalities and caused by dominant mutations in the gene encoding glial fibrillary acidic protein (GFAP), the main intermediate filament protein in astrocytes. We tested the effects of ...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2007.04.035

    authors: Mignot C,Delarasse C,Escaich S,Della Gaspera B,Noé E,Colucci-Guyon E,Babinet C,Pekny M,Vicart P,Boespflug-Tanguy O,Dautigny A,Rodriguez D,Pham-Dinh D

    更新日期:2007-08-01 00:00:00

  • Nuclear actin filaments and their topological changes in frog oocytes.

    abstract::Previous morphological and biochemical studies have suggested that actin and actin-containing filaments (microfilaments) exist in the eukaryotic nucleus and that they perform important nuclear functions. However, the concept is not widely accepted. In this study, we demonstrate actin and bundles of actin in the nuclei...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1995.1101

    authors: Parfenov VN,Davis DS,Pochukalina GN,Sample CE,Bugaeva EA,Murti KG

    更新日期:1995-04-01 00:00:00

  • Subcellular distribution, secretion, and posttranslational modifications of clusterin in thyrocytes.

    abstract::A prominent secretory glycoprotein was detected in the culture medium of porcine thyrocytes which was identified as clusterin by microsequencing. Treatment of thyrocytes with thyroid stimulating hormone revealed a tight regulation of both synthesis and secretion of clusterin, with a distinct fraction of clusterin bein...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1999.4555

    authors: Lemansky P,Brix K,Herzog V

    更新日期:1999-08-25 00:00:00

  • Silencing of OSBP-related protein 8 (ORP8) modifies the macrophage transcriptome, nucleoporin p62 distribution, and migration capacity.

    abstract::ORP8 is an oxysterol/cholesterol binding protein anchored to the endoplasmic reticulum and the nuclear envelope, and is abundantly expressed in the macrophage. We created and characterized mouse RAW264.7 macrophages with ORP8 stably silenced using shRNA lentiviruses. A microarray transcriptome and gene ontology pathwa...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2012.05.026

    authors: Béaslas O,Vihervaara T,Li J,Laurila PP,Yan D,Olkkonen VM

    更新日期:2012-09-10 00:00:00

  • miR-203a is involved in HBx-induced inflammation by targeting Rap1a.

    abstract::Hepatitis B virus (HBV) causes acute and chronic hepatitis, and is one of the major causes of cirrhosis and hepatocellular carcinoma. Accumulating evidence suggests that inflammation is the key factor for liver cirrhosis and hepatocellular carcinoma. MicroRNAs play important roles in many biological processes. Here, w...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2016.10.016

    authors: Wu A,Chen H,Xu C,Zhou J,Chen S,Shi Y,Xu J,Gan J,Zhang J

    更新日期:2016-11-15 00:00:00

  • Mevalonate is essential for growth activation of human fibroblasts: evidence for a critical role of protein glycosylation in the prereplicative period.

    abstract::Human diploid fibroblasts, arrested following serum or mevalonate depletion, were restimulated to a maximal rate of DNA synthesis within 24 h after the addition of serum or mevalonate, respectively. In both cases the initiation of DNA synthesis was preceded by a 12-h prereplicative phase. Upon the stimulation with ser...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1994.1155

    authors: Carlberg M,Hjertman M,Wejde J,Larsson O

    更新日期:1994-06-01 00:00:00

  • Cylindrical substratum induces different patterns of actin microfilament bundles in nontransformed and in ras-transformed epitheliocytes.

    abstract::The influence of the cylindrical substratum surface on the actin microfilament bundle and the extracellular matrix (fibronectin and laminin) patterns in nontransformed epithelial cells of the IAR-2 rat line and in their N-ras-transformed descendants, IAR-ras-c4 cells, was studied. The cells were cultured on substrata ...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1996.0354

    authors: Levina EM,Domnina LV,Rovensky YA,Vasiliev JM

    更新日期:1996-11-25 00:00:00

  • Plakophilin3 loss leads to an increase in lipocalin2 expression, which is required for tumour formation.

    abstract::An increase in tumour formation and metastasis are observed upon plakophilin3 (PKP3) loss. To identify pathways downstream of PKP3 loss that are required for increased tumour formation, a gene expression analysis was performed, which demonstrated that the expression of lipocalin2 (LCN2) was elevated upon PKP3 loss and...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2018.05.026

    authors: Basu S,Chaudhary N,Shah S,Braggs C,Sawant A,Vaz S,Thorat R,Gupta S,Dalal SN

    更新日期:2018-08-15 00:00:00

  • Tg737 acts as a key driver of invasion and migration in liver cancer stem cells and correlates with poor prognosis in patients with hepatocellular carcinoma.

    abstract::We previously demonstrated that the Tg737 gene plays a critical role in the carcinogenesis of hepatocellular carcinoma (HCC). However, few systematic investigations have focused on the biological function of Tg737 in the invasion and migration of liver cancer stem cells (LCSCs) and on its clinical significance. In thi...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2017.06.021

    authors: You N,Tan Y,Zhou L,Huang X,Wang W,Wang L,Wu K,Mi N,Li J,Zheng L

    更新日期:2017-09-15 00:00:00

  • Functional and phenotypic characterization of two HL60 clones resistant to dimethylsulfoxide.

    abstract::Two HL60 clones (C12 and C13) totally insensitive to differentiation induction by dimethylsulfoxide (Me2SO) are described. They have been growing continuously in the presence of the inducer for more than 6 months. The morphological and cytochemical features of the two populations are quite similar to those of the orig...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(83)90275-6

    authors: Ferrero D,Gallo E,Lanfrancone L,Tarella C

    更新日期:1983-08-01 00:00:00

  • Effect of transferrin on alkaline phosphatase activity and collagen synthesis in osteoblastic cells derived from newborn mouse calvaria.

    abstract::The effect of transferrin was tested on osteoblastic cells (clone MC3T3-E1) cultured in serum-free medium containing 1% bovine serum albumin (BSA). Transferrin (Tf) stimulated increases of protein content and protein synthesis, but not of DNA content and cell number, in the cells. This protein also increased alkaline ...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(84)90465-8

    authors: Tsunoi M,Hakeda Y,Kurihara N,Maeda N,Utsumi N,Kumegawa M

    更新日期:1984-07-01 00:00:00

  • Promotion of skeletal muscle differentiation by K252a with tyrosine phosphorylation of focal adhesion: a possible involvement of small GTPase Rho.

    abstract::K252a, a protein kinase inhibitor, acts as a neurotrophic factor in several neuronal cells. In this study we show that K252a enhanced the differentiation of C2C12 myoblasts as well as tyrosine phosphorylation of several focal adhesion-associated proteins including p130(Cas), focal adhesion kinase, and paxillin. The ty...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1006/excr.1999.4648

    authors: Lee KH,Lee SH,Kim D,Rhee S,Kim C,Chung CH,Kwon H,Kang MS

    更新日期:1999-11-01 00:00:00

  • Downregulation of endogenous STAT3 augments tumoricidal activity of interleukin 15 activated dendritic cell against lymphoma and leukemia via TRAIL.

    abstract::Effector functions in tumor resistance by dendritic cells (DCs) are less well characterized. In this study, we describe that the murine DCs upon stimulation with recombinant IL-15 in vitro or in vivo, expresses TNF superfamily member TRAIL which mediates cytotoxicity and growth inhibition against a murine lymphoma cal...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2014.08.012

    authors: Hira SK,Mondal I,Bhattacharya D,Manna PP

    更新日期:2014-10-01 00:00:00

  • Two sites for calcium action in compaction of the mouse embryo.

    abstract::Compact mouse morulae were decompacted in calcium-free medium and allowed to recompact in standard embryo culture medium. When the recompaction medium contained trifluoperazine (TFP)(0.05 mM), an inhibitor of the calcium-dependent protein calmodulin, the embryos failed to recompact. This effect could not be overcome b...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(82)90406-2

    authors: Bilozur M,Powers RD

    更新日期:1982-11-01 00:00:00

  • ISG15 promotes esophageal squamous cell carcinoma tumorigenesis via c-MET/Fyn/β-catenin signaling pathway.

    abstract::Esophageal squamous cell carcinoma (ESCC) is one of the most malignant tumors in China with a poor prognosis. Most ESCC patients were diagnosed at advanced stages, losing the opportunity for surgical excision. Hence, it remains a pressing work to identify biomarkers for early detection, prognosis prediction and target...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/j.yexcr.2018.03.017

    authors: Yuan H,Zhou W,Yang Y,Xue L,Liu L,Song Y

    更新日期:2018-06-01 00:00:00

  • Insulin binds to type V collagen with retention of mitogenic activity.

    abstract::The abilities of eight extracellular matrix proteins, fibronectin, vitronectin, laminin, and collagen types I, II, III, IV, and V to bind insulin were examined by binding studies with insulin conjugated with peroxidase. At a physiological pH and ionic strength, type V collagen bound to insulin most strongly. The other...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/0014-4827(91)90351-t

    authors: Yaoi Y,Hashimoto K,Takahara K,Kato I

    更新日期:1991-06-01 00:00:00

  • Intracellular and extracellular cathepsin B facilitate invasion of MCF-10A neoT cells through reconstituted extracellular matrix in vitro.

    abstract::Lysosomal cysteine proteinase cathepsin B is implicated in remodeling the extracellular matrix, a crucial step in the process of tumor cell invasion. In this study the contributions of intracellular and extracellular cathepsin B activities in the invasion of ras-transformed human breast epithelial cells, MCF-10A neoT,...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/s0014-4827(02)00055-1

    authors: Premzl A,Zavasnik-Bergant V,Turk V,Kos J

    更新日期:2003-02-15 00:00:00

  • Ratjadones inhibit nuclear export by blocking CRM1/exportin 1.

    abstract::In addition to previously isolated ratjadone A we describe three new members of this family, ratjadones B, C, and D, from another strain of the myxobacterium Sorangium cellulosum. We have investigated the properties of these ratjadones with respect to their activity on mammalian cell lines. We found IC(50) values in t...

    journal_title:Experimental cell research

    pub_type: 杂志文章

    doi:10.1016/s0014-4827(03)00100-9

    authors: Köster M,Lykke-Andersen S,Elnakady YA,Gerth K,Washausen P,Höfle G,Sasse F,Kjems J,Hauser H

    更新日期:2003-06-10 00:00:00