共查询到20条相似文献,搜索用时 15 毫秒
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Vascular endothelial growth factors (VEGFs) have been shown to participate in atherosclerosis, arteriogenesis, cerebral edema, neuroprotection, neurogenesis, angiogenesis, postischemic brain and vessel repair, and the effects of transplanted stem cells in experimental stroke. Most of these actions involve VEGF-A and the VEGFR-2 receptor, but VEGF-B, placental growth factor, and VEGFR-1 have been implicated in some cases as well. VEGF signaling pathways represent important potential targets for the acute and chronic treatment of stroke. 相似文献
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Seogang Hyun 《Cellular and molecular life sciences : CMLS》2013,70(13):2351-2365
How animals achieve their specific body size is a fundamental, but still largely unresolved, biological question. Over the past decades, studies on the insect model system have provided some important insights into the process of body size determination and highlighted the importance of insulin/insulin-like growth factor signaling. Fat body, the Drosophila counterpart of liver and adipose tissue, senses nutrient availability and controls larval growth rate by modulating peripheral insulin signaling. Similarly, insulin-like growth factor I produced from liver and muscle promotes postnatal body growth in mammals. Organismal growth is tightly coupled with the process of sexual maturation wherein the sex steroid hormone attenuates body growth. This review summarizes some important findings from Drosophila and mammalian studies that shed light on the general mechanism of animal size determination. 相似文献
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P. A. Bernabei V. Santini O. Dal Pozzo R. Bezzini V. Gattei R. Saccardi G. Rombolà P. Rossi Ferrini 《Cellular and molecular life sciences : CMLS》1988,44(10):903-906
Summary We devised a serum-free medium for growth of leukemic colony-forming units (CFU-L), enriched with albumin, transferrin, lipids, insulin, hydrocortisone and oligoelements. Blast cells from 15 patients affected by acute non-lymphocytic leukemia were grown in this medium in the presence of human placental conditioned medium obtained under serum-free conditions (sfHPCM). Their clonogenic growth was comparable with that obtained in a serum-containing system. Furthermore, when serum-free cultures were carried out in absence of sfHPCM, either CFU-L growth was prevented or, if clones were obtained, the cultures showed a marked decrease in clonogenicity, indicating their strict dependence on growth factors. 相似文献
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P A Bernabei V Santini O Dal Pozzo R Bezzini V Gattei R Saccardi G Rombolà P R Ferrini 《Experientia》1988,44(10):903-906
We devised a serum-free medium for growth of leukemic colony-forming units (CFU-L), enriched with albumin, transferrin, lipids, insulin, hydrocortisone and oligoelements. Blast cells from 15 patients affected by acute non-lymphocytic leukemia were grown in this medium in the presence of human placental conditioned medium obtained under serum-free conditions (sfHPCM). Their clonogenic growth was comparable with that obtained in a serum-containing system. Furthermore, when serum-free cultures were carried out in absence of sfHPCM, either CFU-L growth was prevented or, if clones were obtained, the cultures showed a marked decrease in clonogenicity, indicating their strict dependence on growth factors. 相似文献
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L. Skinnider 《Cellular and molecular life sciences : CMLS》1977,33(7):964-965
Summary Unusual club-shaped processes have been seen in the lymphoblasts in the peripheral blood of case of untreated acute leukemia. These arose from a single area of the cell surface and appeared identical to the morphologic change seen in ropalocytosis in red cells. Red cells in the peripheral blood were also affected. 相似文献
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Samuel S. Newton Neil M. Fournier Ronald S. Duman 《Cellular and molecular life sciences : CMLS》2013,70(10):1739-1752
Recent advances in understanding the cellular and molecular basis of psychiatric illnesses have shed light on the important role played by trophic factors in modulating functional parameters associated with disease causality and drug action. Disease mechanisms are now thought to involve multiple cell types, including neurons and endothelial cells. These functionally distinct but interactively coupled cell types engage in cellular cross talk via shared and common signaling molecules. Dysregulation in their cellular signaling pathways influences brain function and alters behavioral performance. Multifunctional trophic factors such as VEGF and EPO that possess both neurotrophic and angiogenic actions are of particular interest due to their ability to rescue structural and plasticity deficits in neurons and vasculature. Obtaining insight into the behavioral, cellular and molecular actions of multi-functional trophic factors has the potential to open new and transformative therapeutic approaches. 相似文献
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N-acetylglucosaminyltransferase V modifies the signaling pathway of epidermal growth factor receptor 总被引:3,自引:0,他引:3
Guo P Wang QY Guo HB Shen ZH Chen HL 《Cellular and molecular life sciences : CMLS》2004,61(14):1795-1804
Transfection of sense cDNA of N-acetylglucosamyltransferase V (GnTV-S) into human H7721 hepatocarcinoma cells
resulted in an increase in the N-acetylglucosamine1,6mannose1,3- branch (GnT-V product) on the
N-glycans of epidermal growth factor (EGF) receptor (EGFR), and promotion of its EGF binding and tyrosine
autophosphorylation, but showed little effect on the expression of EGFR protein. The phosphorylation at T308,
S473 and tyrosine residue(s) and the activity of protein kinase B (Akt/PKB) as well as the phosphorylation of
p42/44 mitogen-activated protein kinase (MAPK) and MAPK kinase (MEK) before and after EGF stimulation were
concomitantly increased. Conversely, in the antisense GnT-V (GnTV-AS)-transfected H7721 cells, all the results
were the reverse of those with GnTV-S-transfected cells. After the cells were treated with 1-deoxymannojirimycin,
an inhibitor of N-glycan processing at high mannose, or antibody against the extracellular glycan domain of EGFR,
the differences in PKB activity, p42/44 MAPK and MEK phosphorylation among GnTV-S-, GnTV-AS- and mock-transfected
cells were significantly attenuated. These findings indicate that the altered expression of GnT-V will change the
glycan structure and function of EGFR, which may modify downstream signal transduction.Received 24 March 2004; received after revision 1 May 2004; accepted 25 May 2004 相似文献
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Vascular endothelial growth factors (VEGFs) and their high-affinity tyrosine kinase VEGF receptors (VEGFRs) are key regulators of both angiogenesis and neurogenesis. The current issue of CMLS discusses recent literature and work implementing these signals in nervous system development, maintenance and disease pathology. 相似文献
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Increasing evidence links blood coagulation proteins with the regulation of acute and chronic inflammatory disease. Of particular
interest are vitamin K-dependent proteases, which are generated as a hemostatic response to vascular injury, but can also
initiate signal transduction via interactions with vascular receptors. The endothelial cell protein C receptor (EPCR) is a
multi-ligand vitamin K-dependent protein receptor for zymogen and activated forms of plasma protein C and factor VII. Although
the physiological role of the EPCR-FVII(a) interaction is not well-understood, protein C binding to EPCR facilitates rapid
generation of APC in response to excessive thrombin generation, and is a central requirement for the multiple signal-transduction
cascades initiated by APC on both vascular endothelial and innate immune cells. Exciting recent studies have highlighted the
emerging role of EPCR in modulating the cytoprotective properties of APC in a number of diverse inflammatory disorders. In
this review, we describe the structure–function relationships, signal transduction pathways, and cellular interactions that
enable EPCR to modulate the anticoagulant and anti-inflammatory properties of its vitamin K-dependent protein ligands, and
examine the relevance of EPCR to both thrombotic and inflammation-associated disease. 相似文献
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Kang SW 《Cellular and molecular life sciences : CMLS》2007,64(5):533-541
The tyrosine phosphorylation cascade is a hallmark of platelet-derived growth factor (PDGF)- induced signal transduction.
The amplitude and propagation of the tyrosine phosphorylation signal relies on the balance between tyrosine kinase and tyrosine
phosphatase. The tyrosine kinase is latent in the absence of stimulation, whereas the tyrosine phosphatase is highly and constitutively
active. Therefore, the kinase activation should be accompanied by temporal and spatial inactivation of tyrosine phosphatase
to achieve the robust amplification of tyrosine phosphorylation. For the past decade, reactive oxygen species have been receiving
a great deal of attention with regard to their ability to shut down tyrosine phosphatase activities in a reversible manner.
In this article, the crosstalk between tyrosine phosphorylation and reactive oxygen species in PDGF signaling is discussed.
Received 2 October 2006; received after revision 13 November 2006; accepted 27 November 2006 相似文献
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Zusammenfassung In Knochenmark-Monocyten eines fünfjährigen Mädchens konnten im Cytoplasma Einschlüsse beobachtet werden, die mit gewundenen Membranen und virusähnlichen Partikeln fegüllt waren. 相似文献
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Cheema U Brown RA Alp B MacRobert AJ 《Cellular and molecular life sciences : CMLS》2008,65(1):177-186
Tissue hypoxia results in rapid angiogenesis in vivo, triggered by angiogenic proteins, including vascular endothelial growth factor (VEGF). Current views of tissue viability
are founded on whether ‘deeper-lying’ cells receive sufficient nutrients and oxygen for normal activity and ultimately survival.
For intact tissues, levels of such essential nutrients are governed by micro-vascular perfusion. However, there have been
few effective quantitatively defined 3D models, which enable testing of the interplay or interdependence of matrix and cell
density, and path diffusion on oxygen consumption in vitro. As a result, concepts on cell vulnerability to low oxygen levels, together with the nature of cellular responses are ill
defined. The present study has adapted a novel, optical fibre-based system for in situ, real-time oxygen monitoring within three-dimensionally-spiralled cellular collagen constructs, which were then unfurled
to enable quantitative, spatial measurements of VEGF production in different parts of the same construct exposed to different
oxygen levels. A VEGF response was elicited by cells exposed to low oxygen levels (20 mmHg), primarily within the construct
core.
Received 3 August 2007; received after revision 24 October 2007; accepted 29 October 2007
An erratum to this article is available at . 相似文献
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R Berger A Bernheim 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1977,285(12):1183-1185
Chromosome C variants have been analyzed in individuals with hematological disorders. The incidence of chromosome 1 gh+ was significantly enhanced in CML patients (20/24) compared with controls (8/17). The distribution of C-variants of chromosomes 9 and 16 was not different in these individuals. 相似文献