Characterization of the peripheral-type benzodiazepine receptors in cultured astrocytes: evidence for multiplicity.

Abstract:

:In mammalian brain peripheral benzodiazepine (PBZD) receptors are predominantly localized on astroglial cells. Previous studies utilizing whole membrane preparations from brain and peripheral organs of various species have indicated several distinctions between the drug-receptor interactions of the two prototypic PBZD receptor ligands, PK 11195 and Ro5-4864. The present study was undertaken to determine whether putative differences in the binding of PBZD receptor ligands in homogenates of primary astrocyte cultures can be interpreted as the labeling of PBZD receptor subtypes. Equilibrium competition and saturation binding experiments in homogenate preparations of primary astrocytes from cerebral cortex of new born rats revealed that [3H]PK 11195 labels twice the number of [3H]Ro5-4864 binding sites. Unlabeled Ro5-4864 competes for [3H]PK 11195 binding in a manner suggesting the existence of multiple PK 11195 binding sites. The competition binding experiments, using various benzodiazepines, indicate that one binding component of PK 11195 corresponds to Ro5-4864 binding sites, whereas the second is different. The latter binding site does not correspond to the central BZD receptor but displays the pharmacological properties of the PBZD receptor. Further differences between the binding of PK 11195 and Ro5-4864 in astrocytes were detected in the presence of ethanol which was more effective in inhibiting the binding of the latter. Subcellular distribution studies indicated, however, that the binding of both [3H]PK 11195 and [3H]Ro5-4864 is associated primarily with the mitochondrial fraction of astrocytes. Taken together, the present study indicates the existence of non-overlapping PBZD binding sites in astrocytes and thus suggests the existence of PBZD receptor subtypes.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Glia

journal_title

Glia

authors

Itzhak Y,Baker L,Norenberg MD

doi

10.1002/glia.440090306

subject

Has Abstract

pub_date

1993-11-01 00:00:00

pages

211-8

issue

3

eissn

0894-1491

issn

1098-1136

journal_volume

9

pub_type

杂志文章

相关文献

GLIA文献大全
  • ErbB signaling has a role in radial sorting independent of Schwann cell number.

    abstract::In the peripheral nervous system, Schwann cells make myelin, a specialized sheath that is essential for rapid axonal conduction of action potentials. Immature Schwann cells initially interact with many axons, but, through a process termed radial sorting, eventually interact with one segment of a single axon as promyel...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.21175

    authors: Raphael AR,Lyons DA,Talbot WS

    更新日期:2011-07-01 00:00:00

  • Glutamate opens Na+/K+ channels in cultured astrocytes.

    abstract::Glial cells from different brain regions and species are depolarized by the neurotransmitter glutamate. The depolarization or, if voltage-clamped at the resting membrane potential, the inward current induced by glutamate could be due either to activation of receptor-coupled ion channels or electrogenic uptake of the t...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.440010505

    authors: Sontheimer H,Kettenmann H,Backus KH,Schachner M

    更新日期:1988-01-01 00:00:00

  • ATP-induced chemotaxis of microglial processes requires P2Y receptor-activated initiation of outward potassium currents.

    abstract::Microglial cells are the resident macrophages that are involved in brain injuries and infections. Recent studies using transcranial two-photon microscopy have shown that ATP and P2Y receptors mediated rapid chemotactic responses of miroglia to local injury. However, the molecular mechanism for microglial chemotaxis to...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20500

    authors: Wu LJ,Vadakkan KI,Zhuo M

    更新日期:2007-06-01 00:00:00

  • Downregulation of miR-7116-5p in microglia by MPP+ sensitizes TNF-α production to induce dopaminergic neuron damage.

    abstract::Activation of microglia resulting in exacerbated inflammation expression plays an important role in degeneration of dopaminergic (DA) neurons in the pathogenesis of Parkinson's disease (PD). However, how this enhanced inflammation is induced in microglia remains largely unclear. Here, in the mouse PD model induced by ...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.23153

    authors: He Q,Wang Q,Yuan C,Wang Y

    更新日期:2017-08-01 00:00:00

  • AT1 receptor inhibition prevents astrocyte degeneration and restores vascular growth in oxygen-induced retinopathy.

    abstract::We investigated the effect of receptor blockade induced by an angiotensin II type-1 receptor antagonist (AT(1)-RB) on glial and vascular changes in oxygen-induced retinopathy (OIR), a model of retinopathy of prematurity (ROP). OIR was induced in Sprague-Dawley rats by exposure to 80% oxygen from postnatal (P) days 0-1...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20680

    authors: Downie LE,Pianta MJ,Vingrys AJ,Wilkinson-Berka JL,Fletcher EL

    更新日期:2008-08-01 00:00:00

  • Regulation of receptor-mediated shape change in astroglial cells.

    abstract::Activation of adenylate cyclase in astroglial cells in culture results in a rapid change in cell shape that appears to occur by the active movement of cytoplasm from peripheral cell regions to the perinuclear space with processes being formed along regions that remain extended. Three series of experiments were designe...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.440050308

    authors: Shain W,Bausback D,Fiero A,Madelian V,Turner JN

    更新日期:1992-01-01 00:00:00

  • Myelin/oligodendrocyte glycoprotein (MOG) expression is associated with myelin deposition.

    abstract::We investigated the onset of expression of the myelin/oligodendrocyte glycoprotein (MOG) mRNA and protein in the developing mouse central nervous system. In situ hybridization on brain sections at different stages of embryonic and postnatal development showed that MOG transcripts were first detected at birth in the me...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/(SICI)1098-1136(199609)18:1<39::AID-GLIA4>

    authors: Solly SK,Thomas JL,Monge M,Demerens C,Lubetzki C,Gardinier MV,Matthieu JM,Zalc B

    更新日期:1996-09-01 00:00:00

  • ROCK inhibition with Y27632 activates astrocytes and increases their expression of neurite growth-inhibitory chondroitin sulfate proteoglycans.

    abstract::Inhibition of Rho-kinase (ROCK) with Y27632 stimulates sprouting by injured corticospinal tract and dorsal column tract axons, and accelerates functional recovery. However, regeneration of these axons across the glial scar was not observed. Here we examined the effects of Y27632 treatment on chondroitin sulfate proteo...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20466

    authors: Chan CC,Wong AK,Liu J,Steeves JD,Tetzlaff W

    更新日期:2007-03-01 00:00:00

  • The Nrf2-inducible antioxidant defense in astrocytes can be both up- and down-regulated by activated microglia:Involvement of p38 MAPK.

    abstract::The effects of microglia-conditioned medium (MCM) on the inducible Nrf2 system in astrocyte-rich cultures were investigated by determination of glutathione (GSH) levels, γglutamylcysteine ligase (γGCL) activity, the protein levels of Nrf2, Keap1, the modulatory subunit of γGCL (γGCL-M) and activated MAP kinases (ERK1/...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.21151

    authors: Correa F,Ljunggren E,Mallard C,Nilsson M,Weber SG,Sandberg M

    更新日期:2011-05-01 00:00:00

  • Meteorin regulates angiogenesis at the gliovascular interface.

    abstract::Brain microvasculature requires a coordinated interaction between endothelial cells and astrocytes at the gliovascular interface. However, the role of the factors involved in that interaction and expressed by these cells is poorly understood. In this study, we demonstrate that Meteorin is highly expressed in astrocyte...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20600

    authors: Park JA,Lee HS,Ko KJ,Park SY,Kim JH,Choe G,Kweon HS,Song HS,Ahn JC,Yu YS,Kim KW

    更新日期:2008-02-01 00:00:00

  • Astrocyte-neuron interaction in the substantia gelatinosa of the spinal cord dorsal horn via P2X7 receptor-mediated release of glutamate and reactive oxygen species.

    abstract::The substantia gelatinosa (SG) of the spinal cord processes incoming painful information to ascending projection neurons. Whole-cell patch clamp recordings from SG spinal cord slices documented that in a low Ca(2+) /no Mg(2+) (low X(2+) ) external medium adenosine triphosphate (ATP)/dibenzoyl-ATP, Bz-ATP) caused inwar...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.22707

    authors: Ficker C,Rozmer K,Kató E,Andó RD,Schumann L,Krügel U,Franke H,Sperlágh B,Riedel T,Illes P

    更新日期:2014-10-01 00:00:00

  • Foxp3 is a novel repressor of microglia activation.

    abstract::Forkhead transcription factor 3 (Foxp3) is critical for generating CD4(+)CD25(+) regulatory T cells. However, its role in microglia has not been identified. Here, we show that Foxp3 is expressed in microglia and is upregulated upon activation. In Foxp3 mutant mice (Foxp3(sf)), microglia release higher levels of inflam...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.21006

    authors: Chung HS,Lee JH,Kim H,Lee HJ,Kim SH,Kwon HK,Im SH,Bae H

    更新日期:2010-08-01 00:00:00

  • Astrocytic poly(ADP-ribose) polymerase-1 activation leads to bioenergetic depletion and inhibition of glutamate uptake capacity.

    abstract::Poly(ADP-ribose) polymerase-1 (PARP-1) is a ubiquitous nuclear enzyme involved in genomic stability. Excessive oxidative DNA strand breaks lead to PARP-1-induced depletion of cellular NAD(+), glycolytic rate, ATP levels, and eventual cell death. Glutamate neurotransmission is tightly controlled by ATP-dependent astroc...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20936

    authors: Tang KS,Suh SW,Alano CC,Shao Z,Hunt WT,Swanson RA,Anderson CM

    更新日期:2010-03-01 00:00:00

  • Identification of midbrain floor plate radial glia-like cells as dopaminergic progenitors.

    abstract::The floor plate (FP), a signaling center and a structure rich in radial glia-like cells, has been traditionally thought to be devoid of neurons and neuronal progenitors. However, in the midbrain, the FP contains neurons of the dopaminergic (DA) lineage that require contact with radial glia-like cells for their inducti...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20654

    authors: Bonilla S,Hall AC,Pinto L,Attardo A,Götz M,Huttner WB,Arenas E

    更新日期:2008-06-01 00:00:00

  • Constitutive neuregulin-1/ErbB signaling contributes to human vestibular schwannoma proliferation.

    abstract::Vestibular schwannomas (VSs) are benign tumors that arise from the Schwann cells (SCs) lining the vestibular nerve. VS cells survive and proliferate far from neurons and axonally derived growth factors. We have previously shown that VSs produce the glial growth factor, neuregulin-1 (NRG1), and its receptors, ErbB2 and...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20316

    authors: Hansen MR,Roehm PC,Chatterjee P,Green SH

    更新日期:2006-04-15 00:00:00

  • Assembly of a perivascular astrocyte protein scaffold at the mammalian blood-brain barrier is dependent on alpha-syntrophin.

    abstract::alpha-Syntrophin, a member of the dystrophin-associated protein complex, is required for proper localization of the water channel aquaporin-4 at the blood-brain barrier. Mice lacking alpha-syntrophin have reduced levels of aquaporin-4 in perivascular astroglial endfeet. Consequently, they exhibit reduced edema and inf...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20347

    authors: Bragg AD,Amiry-Moghaddam M,Ottersen OP,Adams ME,Froehner SC

    更新日期:2006-06-01 00:00:00

  • Depression of parallel and climbing fiber transmission to Bergmann glia is input specific and correlates with increased precision of synaptic transmission.

    abstract::In the cerebellar cortex, Bergmann glia enclose the synapses of both parallel and climbing fiber inputs to the Purkinje neuron. The glia express Ca(2+)-permeable AMPA receptors, and the GLAST and GLT-1 classes of glutamate transporter, which are activated by glutamate released during synaptic transmission. We have pre...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20768

    authors: Balakrishnan S,Bellamy TC

    更新日期:2009-03-01 00:00:00

  • Regulation of MHC class II expression in glioma cells by class II transactivator (CIITA).

    abstract::We first classified 12 malignant glioma cell lines into three different groups (types 1-3) with respect to major histocompatibility complex (MHC) class II expression and analyzed each group based on the different expression status of the class II transactivator (CIITA) gene. Glioma type 1 (2 of 12) showed constitutive...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.10343

    authors: Takamura Y,Ikeda H,Kanaseki T,Toyota M,Tokino T,Imai K,Houkin K,Sato N

    更新日期:2004-03-01 00:00:00

  • Capacitative Ca2+ influx in glial cells is inhibited by glycolytic inhibitors.

    abstract::In non-excitable cells, stimulation of phosphoinositide (PI) turnover and inhibition of the endoplasmic reticulum (ER) Ca2+-ATPase are methods commonly used to deplete calcium stores, resulting in a capacitative Ca2+ influx (i.e., Ca2+ release-activated Ca2+ influx). Since this Ca2+ influx in glial cells has not been ...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/(sici)1098-1136(199711)21:3<315::aid-glia6

    authors: Wu ML,Kao EF,Liu IH,Wang BS,Lin-Shiau SY

    更新日期:1997-11-01 00:00:00

  • Slow degradation in phagocytic astrocytes can be enhanced by lysosomal acidification.

    abstract::Inefficient lysosomal degradation is central in the development of various brain disorders, but the underlying mechanisms and the involvement of different cell types remains elusive. We have previously shown that astrocytes effectively engulf dead cells, but then store, rather than degrade the ingested material. In th...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.22873

    authors: Lööv C,Mitchell CH,Simonsson M,Erlandsson A

    更新日期:2015-11-01 00:00:00

  • A normal radial glial scaffold is necessary for migration of interneurons during neocortical development.

    abstract::The relationship between radial glia and neurons migrating tangentially from the ganglionic eminence (GE) has been suggested but not firmly established. To study this relationship we used a ferret model of cortical dysplasia where radial glia are highly disorganized. To produce this, an antimitotic, methylazoxy methan...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20488

    authors: Poluch S,Juliano SL

    更新日期:2007-06-01 00:00:00

  • Increase of MCP-1 (CCL2) in myelin mutant Schwann cells is mediated by MEK-ERK signaling pathway.

    abstract::Macrophages are critically involved in the pathogenesis of genetically caused demyelination, as it occurs in inherited demyelinating neuropathies. On the basis of the observation that upregulation of the Schwann cell-derived chemokine MCP-1 (CCL2) is a pathologically relevant mechanism for macrophage activation in mic...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.20657

    authors: Fischer S,Weishaupt A,Troppmair J,Martini R

    更新日期:2008-06-01 00:00:00

  • Ultrastructural study of phagocytic activities of young astrocytes in injured neonatal rat brain following intracerebral injection of colloidal carbon.

    abstract::The cellular reaction to injury in the mature central nervous system (CNS) has been extensively studied in both man and animals, while a detailed study of the reaction of the immature CNS to injury is lacking in the literature. This study was undertaken to elucidate the response of young astrocytes following injection...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.440010306

    authors: Al-Ali SY,Al-Zuhair AG,Dawod B

    更新日期:1988-01-01 00:00:00

  • A functional role of NMDA receptor in regulating the differentiation of oligodendrocyte precursor cells and remyelination.

    abstract::Differentiation of oligodendrocyte precursor cells (OPCs) is the most important event for the myelination of central nervous system (CNS) axons during development and remyelination in demyelinating diseases, while the underlying molecular mechanisms remain largely unknown. Here we show that NMDA receptor (NMDAR) is a ...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.22469

    authors: Li C,Xiao L,Liu X,Yang W,Shen W,Hu C,Yang G,He C

    更新日期:2013-05-01 00:00:00

  • Compartmental distribution of sulfated glycosaminoglycans in lateral and medial midbrain astroglial cultures.

    abstract::Sulfated glycosaminoglycans (S-GAGs) were isolated from the pericellular (P), intracellular (I), and extracellular (E) compartments of astrocytes cultures from lateral (L) and medial (M) sectors of embryonic mouse midbrain; these sectors differ in their ability to support neurite growth (L, permissive, M, non-permissi...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/(SICI)1098-1136(199608)17:4<339::AID-GLIA8

    authors: Garcia-Abreu J,Silva LC,Tovar FF,Onofr- GR,Cavalcante LA,Moura Neto V

    更新日期:1996-08-01 00:00:00

  • Functional properties of retinal Müller cells following transplantation to the anterior eye chamber.

    abstract::Two types of glial cells occur in the retina, Müller cells and astrocytes. These cells share several structural features such as extending endfeet onto blood vessels of the retina. Retinal vessels express a tight blood-retinal barrier which is comparable to the blood-brain barrier (BBB) of the CNS. While astrocytes ha...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.440070205

    authors: Small RK,Watkins BA,Munro PM,Liu D

    更新日期:1993-02-01 00:00:00

  • Cell death and neuronal differentiation of glioblastoma stem-like cells induced by neurogenic transcription factors.

    abstract::Glioblastoma multiform (GBM) are devastating brain tumors containing a fraction of multipotent stem-like cells which are highly tumorigenic. These cells are resistant to treatments and are likely to be responsible for tumor recurrence. One approach to eliminate GBM stem-like cells would be to force their terminal diff...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.22429

    authors: Guichet PO,Bieche I,Teigell M,Serguera C,Rothhut B,Rigau V,Scamps F,Ripoll C,Vacher S,Taviaux S,Chevassus H,Duffau H,Mallet J,Susini A,Joubert D,Bauchet L,Hugnot JP

    更新日期:2013-02-01 00:00:00

  • Effect of TPA on aquaporin 4 mRNA expression in cultured rat astrocytes.

    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

    pub_type: 杂志文章

    doi:

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

    更新日期:1999-02-01 00:00:00

  • Spinal cord injury induces differential expression of the profibrotic semaphorin 7A in the developing and mature glial scar.

    abstract::Semaphorin 7A (Sema7A) is involved in the formation of the central nervous system during development by operating axon guidance and neuronal migration. We investigated the expression of the TGFβ-inducible Sema7A following spinal cord injury (SCI). After SCI, Sema7A(+) cells accumulated specifically in lesion areas res...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/glia.21045

    authors: Kopp MA,Brommer B,Gatzemeier N,Schwab JM,Prüss H

    更新日期:2010-11-01 00:00:00

  • Oligodendrocyte-type-2 astrocyte (O-2A) progenitor cells derived from adult rat spinal cord: in vitro characteristics and response to PDGF, bFGF and NT-3.

    abstract::We have analysed in detail the properties of oligodendrocyte-type-2 astrocyte (O-2A) progenitor cells derived from the spinal cords of adult rats to gain further insights into the mechanisms that control the generation of oligodendrocytes in the healthy and demyelinated adult central nervous systems (CNS). When O-2A p...

    journal_title:Glia

    pub_type: 杂志文章

    doi:10.1002/(SICI)1098-1136(199601)16:1<16::AID-GLIA3>

    authors: Engel U,Wolswijk G

    更新日期:1996-01-01 00:00:00