Abstract:
:Glycosaminoglycans (heparins, dermatan sulfate, chondroitin sulfate) with different structures and physicochemical properties were evaluated for their capacity to influence proliferation and differentiation of U-937 cell line. The contrasting and specific effects of glycosaminoglycans (depending on their structures and properties) on a leukemia cell line could help explain the regulation of proliferative and/or differentiative processes of hematopoietic cells in order to clarify the control of development and differentiation of hematopoietic progenitor cells by bone marrow extracellular matrix. Heparin from beef intestinal mucosa, heparan sulfate from beef spleen, dermatan sulfate from beef intestinal mucosa, and chondroitin sulfate from bovine trachea were extracted and purified, and their purity, structures, and physicochemical properties were evaluated. Fast-moving heparin was obtained by its selective precipitation as barium salt, and partially desulfated and re-N-sulfated heparin was produced by chemical modifications. Different glycosaminoglycans were tested to evaluate their effects on proliferation and differentiation processes of a monoblastic leukemia cell line (U-937). Heparin and derivatives (from 0.1 to 100 micrograms/ml) inhibit cell proliferation; heparan sulfate does not produce modifications, while chondroitin sulfate and dermatan sulfate (from 0.01 to 100 micrograms/ml) significantly stimulate cell growth. Cell differentiation was evaluated by cytoenzymatic determination of alpha-naphthyl butyrate esterase and by fluorescein-labeled anti-HLA-DR, anti-CD11b, and anti-CD14 antibodies. Nitro blue tetrazolium reduction and phagocytosis were also evaluated. Heparin and derivatives significantly increase U-937 differentiation. Heparin sulfate has no effect, while chondroitin sulfate and, to a lesser extent, dermatan sulfate, induce a strong decrease of differentiative markers. The regulation of U-937 cell properties appears to be related to charge density and to the amount of N-sulfate and N-acetyl groups. In particular, glycosaminoglycans with lower sulfate-to-carboxyl ratios and N-sulfate group percentages (chondroitin sulfate and dermatan sulfate) stimulate proliferation and produce a decrease of differentiative markers; on the contrary, polysaccharides with high charge density and N-sulfate group amounts (heparin and derivatives) inhibit U-937 proliferation and induce terminal differentiation. A previous paper (N. Volpi, L. Bolognani, A. Conte, and M. Petrini, (1993) Leukemia Res. 17, 789-798) demonstrates dissimilar effects on U-937 cells by chondroitin sulfates with different structures and physicochemical properties. In this study we confirm the importance of glycosaminoglycan structures and physicochemical properties in regulating cell functions. Possible mechanisms of action are discussed.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Volpi N,Petrini M,Conte A,Valentini P,Venturelli T,Bolognani L,Ronca Gdoi
10.1006/excr.1994.1323subject
Has Abstractpub_date
1994-11-01 00:00:00pages
119-30issue
1eissn
0014-4827issn
1090-2422pii
S0014-4827(84)71323-1journal_volume
215pub_type
杂志文章abstract::Four and one half LIM domain protein FHL2 participates in many cellular processes involved in tissue repair such as regulation of gene expression, cytoarchitecture, cell adhesion, migration and signal transduction. The repair process after wounding is initiated by the release of peptides and bioactive lipids. These mo...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2008.09.023
更新日期:2008-12-10 00:00:00
abstract::In preliminary experiments it was established that the hypertrophic and hyperplastic responses of neonatal cardiac myocytes in culture were associated with enhanced expression of IGF-1 and IGF-1 receptors in these cells. Therefore, to determine the role of IGF-1 receptors on myocyte growth, cells were exposed to antis...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1994.1343
更新日期:1994-12-01 00:00:00
abstract::Autophagy is the principle pathway within cells involved in clearing damaged proteins and organelles. Therefore autophagy is necessary to maintain the turnover balance of peptides and homoeostasis. Autophagy occurs at basal levels under normal conditions but can be upregulated by chemical inducers or stress conditions...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2014.07.014
更新日期:2014-10-15 00:00:00
abstract::Primary erythroid cells and erythroid cell lines may synthesize and secrete tumor necrosis factor-alpha (TNF-alpha) following stimulation with erythropoietin (EPO). The effect of triggering TNF-alpha synthesis and secretion was investigated in erythroleukemia and myeloid cell lines: HCD57, DA3-EPOR, and BAF3-EPOR. The...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2004.04.009
更新日期:2004-08-01 00:00:00
abstract::Cytosolic extracts from actively dividing lymphoid cells have been shown to induce DNA synthesis in isolated, quiescent nuclei. An initiating factor in such extracts (activator of DNA replication; ADR) is a > 90-kDa aprotinin-binding protein whose activity is inhibitable not only by aprotinin, but also by several othe...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1993.1090
更新日期:1993-04-01 00:00:00
abstract::The phosphorylation state of the CD18-chain of beta 2-integrins have been shown not to mediate changes in the avidity of these receptors (i.e., inside-out signaling); however, no alternative functional significance has been proposed. Our study focused on how changes in the phosphorylation state of beta 2-integrin-rece...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1995.1073
更新日期:1995-03-01 00:00:00
abstract::It has been suggested that the protein kinase C zeta (zeta PKC) isoform is involved in mitogenic signaling in Xenopus oocytes and mammalian cells. Thus, the characterization of potential regulatory molecules that bind to zeta PKC is of great interest. We report here the identification by affinity chromatography of tub...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1996.3364
更新日期:1997-01-10 00:00:00
abstract::Hyaluronan binding protein (HABP1), located on human chromosome 17p13.3, was identified and characterized as being involved in cellular signaling from our laboratory. Here, we demonstrate that HABP1 expression in Schizosaccharomyces pombe induces growth inhibition, morphological abnormalities like elongation, multinuc...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2005.05.025
更新日期:2005-10-01 00:00:00
abstract::Human endothelial cells, when suspended within three-dimensional collagen matrices, develop intracellular vacuoles that coalesce to form capillary lumens and tubes. Vacuole and lumen formation are completely dependent on the collagen-binding integrin alpha 2 beta 1, while other endothelial cell integrins had no appare...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1996.0109
更新日期:1996-04-10 00:00:00
abstract::New methods have been developed for the purification and characterization of the cell wall degrading enzyme, lysin, which is released into the medium during the mating reaction of the biflagellated alga Chlamydomonas reinhardtii. A quantitative spectrophotometric assay that detects the number of cells losing walls was...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(88)90357-6
更新日期:1988-11-01 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::We have analyzed the spatial and temporal relationship between transcription and replication sites during the first cell cycle in mouse embryos. Embryos were microinjected with both 5-bromouridine-5'-triphosphate and digoxygenin-11-deoxyuridine-5'-triphosphate to visualize transcription and replication sites respectiv...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1997.3708
更新日期:1997-10-10 00:00:00
abstract::Regions rich in 5-methylcytosine were localized in male metaphase chromosomes of the Indian muntjac deer (Muntiakus muntjak). Chromosomes were ultraviolet irradiated and subsequently photooxidized in the presence of methylene blue to induce maximum DNA denaturation. Following treatment with anti 5-methylcytosine antib...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(83)90289-6
更新日期:1983-08-01 00:00:00
abstract::Bone morphogenetic proteins (BMPs) are multifunctional signaling molecules that have gained increasing interest in cancer research. To obtain a systematic view on BMP signaling in pancreatic cancer we first determined the mRNA expression levels of seven BMP ligands (BMP2-BMP8) and six BMP specific receptors in pancrea...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2011.06.001
更新日期:2011-09-10 00:00:00
abstract::UNC5H receptors (UNC5H1, UNC5H2, UNC5H3) are putative tumor suppressors whose expression is lost in numerous cancers. These receptors have been shown to belong to the so-called family of dependence receptors. Such receptors induce apoptosis when their ligand netrin-1 is absent, thus conferring a state of cellular depe...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2008.06.001
更新日期:2008-08-15 00:00:00
abstract::Integrins play a major role in cell adhesion and migration. Previous work reported that a cleaved form of integrin alpha6 (alpha6p) was detected in invasive human prostate cancer tissue, absent in normal prostate tissue and was produced by urokinase-type Plasminogen Activator (uPA) in a plasmin-independent manner. Usi...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2007.01.006
更新日期:2007-04-01 00:00:00
abstract::Activin A belongs to the superfamily of transforming growth factor beta (TGFβ) and is a critical regulatory cytokine in breast cancer and inflammation. However, the role of activin A in migration of breast cancer cells and immune cells was not well characterized. Here, a microfluidic device was used to examine the eff...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2017.05.003
更新日期:2017-08-01 00:00:00
abstract::In preparation for studies on the growth factor requirements of normal and transformed human fibroblasts, we have developed a serum-free medium that supports vigorous long-term serial subculture of diploid human fibroblasts and allows them to form large-sized colonies with high efficiency (40 to 60%) when plated at cl...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(87)90390-9
更新日期:1987-10-01 00:00:00
abstract::Cellular senescence is characterized by a decline in sensitivity to growth factors resulting in cessation of cellular growth. The expression of cellular or viral oncogenes may result in the establishment of cell lines with unlimited proliferative potential ("immortalization"). A variety of viral and cellular oncogenes...
journal_title:Experimental cell research
pub_type: 杂志文章,评审
doi:10.1016/0014-4827(90)90027-8
更新日期:1990-11-01 00:00:00
abstract::During pathological bone loss, factors that are both stimulatory and inhibitory for osteoclast differentiation are over-expressed. Despite the presence of inhibitory factors, osteoclast differentiation is significantly enhanced to bring about bone loss. To examine the hypothesis that stimulatory growth factors overcom...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2003.11.009
更新日期:2004-03-10 00:00:00
abstract::Human 293 cells were stably transfected with a plasmid introducing a receptor for the ecdysone analog muristerone. The cells were further stably transfected with muristerone-inducible expression vectors carrying either the cDNA for the human high K(M) 5'-nucleotidase or the coding sequence of the nucleotidase linked t...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1999.4681
更新日期:1999-12-15 00:00:00
abstract::An attempt was made to determine the role of metabolic acidification of pericellular medium in regulating cell proliferation. A method of measuring the pH of pericellular medium at a distance exceeding a Debye radius of 5-10 A from the cell surface (pHp) was developed. The values of pHp and pH measured in the medium a...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(85)90188-0
更新日期:1985-10-01 00:00:00
abstract::The casein kinase I (CKI) family consists of at least seven vertebrate genes, some of which can be alternatively spliced. Previously, we have studied the four splice variants of the chicken CKIalpha gene. The four proteins differ only by the presence or absence of two peptides, a 28-amino-acid "L" insert in the cataly...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.2001.5324
更新日期:2001-10-01 00:00:00
abstract::Protein kinases are thought to play a key role in signal transduction and oncogenesis, but little is known about the intranuclear phosphorylation events associated with transformation. Here we report on cell cycle-dependent phosphorylation of cytoskeleton-associated 350 kD protein and the regular interchange in its lo...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(86)90169-2
更新日期:1986-12-01 00:00:00
abstract::Taking the advantage of single-molecule imaging, our recent study has revealed surprisingly long processive movement of a Formin protein, mDia1, surfing along with the growing end of actin filaments in living cells. This finding provides direct evidence for the ability of Formins to function as processive cappers that...
journal_title:Experimental cell research
pub_type: 杂志文章,评审
doi:10.1016/j.yexcr.2004.08.020
更新日期:2004-11-15 00:00:00
abstract::Cellular senescence is a state of irreversible cell cycle arrest in which normal cells at the end of their lifespan fail to enter into DNA synthesis upon serum or growth factor stimulation. We examined whether proteins required for G1/S cell cycle progression were irreversibly down-regulated in senescent human fibrobl...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1993.1306
更新日期:1993-12-01 00:00:00
abstract::Insulin-like growth factor-1 (IGF-1) and its receptor (IGF-1R) are required for cell proliferation in vitro, raising the possibility that an autocrine IGF-1-IGF-1R system may be present in vivo and become activated in the viable ventricular myocytes shortly after infarction. Therefore, following the in vivo documentat...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1994.1224
更新日期:1994-08-01 00:00:00
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
更新日期:2014-10-01 00:00:00
abstract::The fruit fly Drosophila melanogaster has recently emerged as an excellent system to investigate the genetics of cardiovascular development and disease. Drosophila provides an inexpensive and genetically-tractable in vivo system with a large number of conserved features. In addition, the Drosophila embryo is transpare...
journal_title:Experimental cell research
pub_type: 杂志文章,评审
doi:10.1016/j.yexcr.2017.03.057
更新日期:2017-09-01 00:00:00
abstract::The male fetal lung begins to synthesize surfactant later in gestation than the female. This delay appears to be caused by androgens. We hypothesized that male fetal lung differentiation is delayed as a consequence of an extended phase of growth which is elicited by androgens. We observed that in vivo fetal lung prote...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(90)90281-e
更新日期:1990-05-01 00:00:00