Astrocyte calcium waves: what they are and what they do.

abstract：:Extracellular levels of the brain's endogenous anticonvulsant and neuroprotectant adenosine largely depend on an astrocyte-based adenosine cycle, comprised of ATP release, rapid degradation of ATP into adenosine, and metabolic reuptake of adenosine through equilibrative nucleoside transporters and phosphorylation by a...

journal_title：Glia

authors： Boison D

更新日期：2012-08-01 00:00:00

abstract：:The amyloid hypothesis of Alzheimer's disease (AD) suggests that soluble amyloid β (Aβ) is an initiator of a cascade of events eventually leading to neurodegeneration. Recently, we reported that Aβ deranged Ca(2+) homeostasis specifically in hippocampal astrocytes by targeting key elements of Ca(2+) signaling, such as...

journal_title：Glia

authors： Lim D,Iyer A,Ronco V,Grolla AA,Canonico PL,Aronica E,Genazzani AA

更新日期：2013-07-01 00:00:00

abstract：:Epidermal growth factor (EGF) is known to promote proliferation of both retinal progenitors and Muller glia in vitro, but several questions remain concerning an in vivo role for this factor. In this study, we investigated whether the EGF receptor (EGFR) is necessary for the maintenance of normal levels of progenitor a...

journal_title：Glia

authors： Close JL,Liu J,Gumuscu B,Reh TA

更新日期：2006-08-01 00:00:00

abstract：:To develop effective procedures for improving the regeneration of peripheral nerves and for preventing the formation of neurofibromas, it is necessary to identify the different mitogens that stimulate the proliferation of Schwann cells. Insulin-like growth factor I (IGF-I), which is a potent autocrine growth factor in...

journal_title：Glia

authors： Schumacher M,Jung-Testas I,Robel P,Baulieu EE

更新日期：1993-08-01 00:00:00

abstract：:We have shown previously that switching of the alpha v-associated beta1 and beta5 integrin subunits during differentiation of myelin-forming oligodendrocytes may regulate important aspects of cell behaviour such as migration (Milner et al., 1996: J Neurosci 16:7240-7252). In this study we have examined the development...

journal_title：Glia

authors： Milner R,Frost E,Nishimura S,Delcommenne M,Streuli C,Pytela R,Ffrench-Constant C

更新日期：1997-12-01 00:00:00

abstract：:In multiple sclerosis (MS), one strategy to reduce disability is enhancement of endogenous repair by remyelinating oligodendrocytes derived from oligodendrocyte progenitor cells (OP). An important prerequisite is determining the abundance of OP relative to oligodendrocytes in normal human central nervous system (CNS),...

journal_title：Glia

authors： Jennings A,Carroll W

更新日期：2010-09-01 00:00:00

abstract：:Toll-like receptors 7 (TLR7) and 9 (TLR9) are important mediators of innate immune responses. Both receptors are located in endosomal compartments, recognize nucleic acids, and signal via Myeloid differentiation factor 88 (MyD88). In the current study, we analyzed TLR7 and TLR9 induced activation of astrocytes and mic...

journal_title：Glia

authors： Butchi NB,Du M,Peterson KE

更新日期：2010-04-15 00:00:00

abstract：:Niemann-Pick disease type C (NPC) is a deadly neurodegenerative disease often caused by mutation in a gene called NPC1, which results in the accumulation of unesterified cholesterol and glycosphingolipids in the endosomal-lysosomal system. Most studies on the mechanisms of neurodegeneration in NPC have focused on neur...

journal_title：Glia

authors： Chen G,Li HM,Chen YR,Gu XS,Duan S

更新日期：2007-11-15 00:00:00

abstract：:Transplantation of oligodendrocyte precursor cells (OPCs) results in efficient remyelination in animal models of demyelination. However, the experiments so far undertaken have not addressed the need for tissue-type matching to achieve graft-mediated remyelination. Examination of MHC expression (main determinant of all...

journal_title：Glia

authors： Tepavcević V,Blakemore WF

更新日期：2006-12-01 00:00:00

abstract：:Plaque deposition in Alzheimer's disease (AD) is known to decrease proliferation in neurogenic niches in AD mouse models, but the effects on cell proliferation and differentiation in other brain areas have not been studied in detail. We analyzed cell proliferation in the cortex of wild type (WT) and APPswePS1dE9 trans...

journal_title：Glia

authors： Kamphuis W,Orre M,Kooijman L,Dahmen M,Hol EM

更新日期：2012-04-01 00:00:00

abstract：:Hypotonic challenge induces transient swelling in glial cells, which is typically followed by a regulatory volume decrease (RVD). In contrast, lactic acidosis (lactacidosis) induces persistent cell swelling in astrocytes without an accompanying RVD. In the present study, we studied the mechanisms by which lactacidosis...

journal_title：Glia

authors： Nabekura T,Morishima S,Cover TL,Mori S,Kannan H,Komune S,Okada Y

更新日期：2003-02-01 00:00:00

abstract：:Excessive extracellular glutamate leads to neuronal death in central nervous system. Excitatory glutamate transporter subtype 2 (GLT-1) carries bulk of glutamate reuptake in cerebral ischemia. Although GLT-1 expression fluctuates during the period of ischemia, little is known about its regulatory mechanism. Here we sh...

journal_title：Glia

authors： Ji YF,Zhou L,Xie YJ,Xu SM,Zhu J,Teng P,Shao CY,Wang Y,Luo JH,Shen Y

更新日期：2013-12-01 00:00:00

abstract：:The glial cells that ensheath olfactory axons are referred to as ensheathing cells. In vivo, these non-myelinating glial cells express a mixture of astrocyte-specific and Schwann cell-specific phenotypic features with the former cellular phenotype predominating, but in vitro can assemble a myelin sheath when co-cultur...

journal_title：Glia

authors： Doucette R,Devon R

更新日期：1994-04-01 00:00:00

abstract：:It has been suggested that astrocytic glutamate release or perturbed glutamate metabolism contributes to the proneness to epileptic seizures. Here we investigated whether astrocytic contents of the major glutamate degrading enzymes glutamine synthetase (GS) and glutamate dehydrogenase (GDH) decreases on moving from th...

journal_title：Glia

authors： Hammer J,Alvestad S,Osen KK,Skare Ø,Sonnewald U,Ottersen OP

更新日期：2008-06-01 00:00:00

abstract：:To examine the neurochemical effects of chronic hypoxia on immature nervous tissue in vitro, mixed neuronal-glial cell cultures derived from fetal mice were exposed to 5% O2 for 24 or 48 h. Those cultures subjected to longer hypoxia manifested improved neuronal survival compared to those with the shorter insult, both ...

journal_title：Glia

authors： Sher PK,Hu SX

更新日期：1990-01-01 00:00:00

abstract：:The effect of cholinergic agonists and antagonists on the intracellular free Ca2+ concentration ([Ca2+]i) of leech neuropile glial cells was investigated by use of iontophoretically injected fura-2. In neuropile glial cells, cholinergic agonists induced a marked increase in [Ca2+]i that was inhibited by d-tubocurarine...

journal_title：Glia

authors： Hochstrate P,Schlue WR

更新日期：1995-09-01 00:00:00

abstract：:The receptors for the complement anaphylatoxins C3a and C5a are expressed by glial cells and neurons in normal and inflamed brain. Previous studies demonstrated modest elevations in mRNA expression of these receptors in a model of focal cerebral ischemia. Using a similar model system for both mice and rats, we report ...

journal_title：Glia

authors： Barnum SR,Ames RS,Maycox PR,Hadingham SJ,Meakin J,Harrison D,Parsons AA

更新日期：2002-04-15 00:00:00

abstract：:Aquaporin 4 (AQP4) is a predominant water channel protein in mammalian brains, localized in the astrocyte plasma membrane. The regulation of AQP4 is believed to be important for the homeostasis of water in the brain, but the AQP4 regulatory mechanisms are not yet known. In this study, we investigated the effect of a p...

journal_title：Glia

authors： Nakahama K,Nagano M,Fujioka A,Shinoda K,Sasaki H

更新日期：1999-02-01 00:00:00

abstract：:Isolated acellular nerve segments protected from migration of Schwann cells and the acellular nerve segments joined with the distal nerve stumps were prepared by a repeated freeze-thaw procedure in the rat sciatic nerves. The presence of laminin-1 and -2, as well as alpha6 and beta1 integrin chains, was detected by in...

journal_title：Glia

authors： Dubový P,Svízenská I,Klusáková I,Zítková A,Houst'Ava L,Haninec P

更新日期：2001-01-01 00:00:00

abstract：:The biologically active lipid metabolite, platelet-activating factor (PAF), is thought to contribute to inflammatory processes and tissue damage in a variety of central nervous system (CNS) injuries. In previous studies, we found that after contusion spinal cord injury, treatment with a PAF antagonist led to significa...

journal_title：Glia

authors： Hostettler ME,Knapp PE,Carlson SL

更新日期：2002-05-01 00:00:00

abstract：:Dentate neurogenesis, important for learning and memory, declines dramatically by middle age. Although studies have shown that this age-related decrease can be reversed to some extent by exogenous applications of mitogenic factors, it is unclear whether one or more of these factors exhibits decline by middle age. We h...

journal_title：Glia

authors： Shetty AK,Hattiangady B,Shetty GA

更新日期：2005-08-15 00:00:00

abstract：:The mitogenic role of sphingosine-1-phosphate (S1P) and its involvement in basic fibroblast growth factor (bFGF)-induced proliferation were examined in primary cultures of cerebellar astrocytes. Exposure to bFGF resulted in a rapid increase of extracellular S1P formation, bFGF inducing astrocytes to release S1P, but n...

journal_title：Glia

authors： Bassi R,Anelli V,Giussani P,Tettamanti G,Viani P,Riboni L

更新日期：2006-04-15 00:00:00

abstract：:Type I interferons (IFNs), IFN-α and IFN-β, represent the major effector cytokines of the host immune response against viruses and other intracellular pathogens. These cytokines are produced via activation of numerous pattern recognition receptors, including the Toll-like receptor signaling network, retinoic acid-indu...

journal_title：Glia

authors： Blank T,Prinz M

更新日期：2017-09-01 00:00:00

abstract：:We evaluated the intracellular and extracellular biological role of S100B protein with respect to microglia. S100B, which belongs to the multigenic family of Ca2+-binding proteins, is abundant in astrocytes where it is found diffusely in the cytoplasm and is associated with membranes and cytoskeleton constituents. S10...

journal_title：Glia

authors： Adami C,Sorci G,Blasi E,Agneletti AL,Bistoni F,Donato R

更新日期：2001-02-01 00:00:00

abstract：:Long-term, persistent central nervous system inflammation is commonly seen following brain infection. Using a murine model of viral encephalitis (murine cytomegalovirus, MCMV) we have previously shown that post-encephalitic brains are maintained in an inflammatory state consisting of glial cell reactivity, retention o...

journal_title：Glia

authors： Lokensgard JR,Schachtele SJ,Mutnal MB,Sheng WS,Prasad S,Hu S

更新日期：2015-11-01 00:00:00

abstract：:Neuroaxonal degeneration is a pathological hallmark of multiple sclerosis (MS) contributing to irreversible neurological disability. Pathological mechanisms leading to axonal damage include autoimmunity to neuronal antigens. In actively demyelinating lesions, myelin is phagocytosed by microglia and blood-borne macroph...

journal_title：Glia

authors： Huizinga R,van der Star BJ,Kipp M,Jong R,Gerritsen W,Clarner T,Puentes F,Dijkstra CD,van der Valk P,Amor S

更新日期：2012-03-01 00:00:00

abstract：:The sequence of events by which new oligodendrocytes are generated in the adult mammalian central nervous system has not been clearly defined. Here we review old evidence that remyelinating cells can arise from the division of mature oligodendrocytes. In addition, we report the results of a tissue culture study compar...

journal_title：Glia

authors： Wood PM,Bunge RP

更新日期：1991-01-01 00:00:00

abstract：:A growth cone-enriched fraction was prepared from 3-4 day rat cerebra. Examination of the growth cone fraction by electron microscopy revealed numerous structures circular in appearance that contain a number of features common to neuronal growth cones in vivo. The isolated growth cones stimulated a dose-dependent inco...

journal_title：Glia

authors： Dent EW,Ida JA Jr,Yoshino JE

更新日期：1992-01-01 00:00:00

abstract：:The G protein-coupled receptor 17 (GPR17) plays crucial roles in myelination. It is highly expressed during transition of oligodendrocyte progenitor cells to immature oligodendrocytes, but, after this stage, it must be down-regulated to allow generation of mature myelinating cells. After endocytosis, GPR17 is sorted i...

journal_title：Glia

authors： Meraviglia V,Ulivi AF,Boccazzi M,Valenza F,Fratangeli A,Passafaro M,Lecca D,Stagni F,Giacomini A,Bartesaghi R,Abbracchio MP,Ceruti S,Rosa P

更新日期：2016-08-01 00:00:00

abstract：:Accumulative evidence indicates that microglial cells influence the normal development of central nervous system (CNS) synapses. Yet, the functional properties of microglia in relation with synapse development remain unclear. We recently showed that in layer 4 of the whisker-related barrel field of the mouse somatosen...

journal_title：Glia

authors： Arnoux I,Hoshiko M,Mandavy L,Avignone E,Yamamoto N,Audinat E

更新日期：2013-10-01 00:00:00