1
|
Storozhevykh TP, Senilova YE, Brustovetsky T, Pinelis VG, Brustovetsky N. Neuroprotective Effect of KB-R7943 Against Glutamate Excitotoxicity is Related to Mild Mitochondrial Depolarization. Neurochem Res 2009; 35:323-35. [DOI: 10.1007/s11064-009-0058-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2009] [Indexed: 01/08/2023]
|
2
|
Gorbacheva LR, Storozhevykh TP, Pinelis VG, Davydova ON, Ishiwata S, Strukova SM. Activated protein C via PAR1 receptor regulates survival of neurons under conditions of glutamate excitotoxicity. Biochemistry Moscow 2008; 73:717-24. [PMID: 18620539 DOI: 10.1134/s0006297908060138] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The effect of an anticoagulant and cytoprotector blood serine proteinase--activated protein C (APC)--on survival of cultured hippocampal and cortical neurons under conditions of glutamate-induced excitotoxicity has been studied. Low concentrations of APC (0.01-10 nM) did not cause neuron death, but in the narrow range of low concentrations APC twofold and stronger decreased cell death caused by glutamate toxicity. High concentrations of APC (>50 nM) induced the death of hippocampal neurons similarly to the toxic action of glutamate. The neuroprotective effect of APC on the neurons was mediated by type 1 proteinase-activated receptor (PAR1), because the inactivation of the enzyme with phenylmethylsulfonyl fluoride or PAR1 blockade by a PAR1 peptide antagonist ((Tyr1)-TRAP-7) prevented the protective effect of APC. Moreover, APC inhibited the proapoptotic effect of 10 nM thrombin on the neurons. Geldanamycin, a specific inhibitor of heat shock protein Hsp90, completely abolished the antiapoptotic effect of 0.1 nM APC on glutamate-induced cytotoxicity in the hippocampal neurons. Thus, APC at low concentrations, activating PAR1, prevents the death of hippocampal and cortical neurons under conditions of glutamate excitotoxicity.
Collapse
Affiliation(s)
- L R Gorbacheva
- Biology Faculty, Lomonosov Moscow State University, Moscow, 119899, Russia
| | | | | | | | | | | |
Collapse
|
3
|
Storozhevykh TP, Tukhbatova GR, Senilova YE, Pinelis VG, Andreeva LA, Myasoyedov NF. Effects of semax and its Pro-Gly-Pro fragment on calcium homeostasis of neurons and their survival under conditions of glutamate toxicity. Bull Exp Biol Med 2008; 143:601-4. [PMID: 18239779 DOI: 10.1007/s10517-007-0192-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Semax (100 microM) and its Pro-Gly-Pro fragment (20 and 100 microM) delayed the development of calcium dysregulation and reduction of the mitochondrial potential in cultured cerebellar granule cells under conditions of glutamate neurotoxicity. Incubation with these peptides improved neuronal survival by on average 30%. The neuroprotective effect of semax in cerebral ischemia/hypoxia can be due to improvement of mitochondrial resistance to "calcium" stress.
Collapse
Affiliation(s)
- T P Storozhevykh
- Laboratory of Membranology, Center of Children's Health, Russian Academy of Medical Sciences, Moscow, Russia.
| | | | | | | | | | | |
Collapse
|
4
|
Storozhevykh TP, Sorokina EG, Vabnitz AV, Senilova YE, Tukhbatova GR, Pinelis VG. Na+/Ca2+ exchange and regulation of cytoplasmic concentration of calcium in rat cerebellar neurons treated with glutamate. Biochemistry (Mosc) 2007; 72:750-9. [PMID: 17680767 DOI: 10.1134/s0006297907070097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In the present work, the forward and/or reversed Na+/Ca2+ exchange in cerebellar granular cells was suppressed by substitution of Na+o by Li+ before, during, and after exposure to glutamate for varied time and also using the inhibitor KB-R7943 of the reversed exchange. After glutamate challenge for 1 min, Na+o/Li+ substitution did not influence the recovery of low [Ca2+]i in a calcium-free medium. A 1-h incubation with 100 microM glutamate induced in the neurons a biphasic and irreversible [Ca2+]i rise (delayed calcium deregulation (DCD)), enhancement of [Na+]i, and decrease in the mitochondrial potential. If Na+o had been substituted by Li+ before the application of glutamate, i.e. the exchange reversal was suppressed during the exposure to glutamate, the number of cells with DCD was nearly fourfold lowered. However, addition of the Na+/K+-ATPase inhibitor ouabain (0.5 mM) not preventing the exchange reversal also decreased DCD in the presence of glutamate. Both exposures decreased the glutamate-caused loss of intracellular ATP. Glucose deprivation partially abolished protective effects of the Na+o/Li+ substitution and ouabain. KB-R7943 (10 microM) increased 7.4-fold the number of cells with the [Ca2+]i decreased to the basal level after the exposure to glutamate. Thus, reversal of the Na+/Ca2+ exchange reinforced the glutamate-caused perturbations of calcium homeostasis in the neurons and slowed the recovery of the decreased [Ca2+]i in the post-glutamate period. However, for development of DCD, in addition to the exchange reversal, other factors are required, in particular a decrease in the intracellular concentration of ATP.
Collapse
Affiliation(s)
- T P Storozhevykh
- Research Center for Children's Health, Russian Academy of Medical Sciences, Moscow, 119991, Russia.
| | | | | | | | | | | |
Collapse
|
5
|
Sorokina EG, Storozhevykh TP, Senilova YE, Granstrem OK, Reutov VP, Pinelis VG. Effect of antibodies against AMPA glutamate receptors on brain neurons in primary cultures of the cerebellum and hippocampus. Bull Exp Biol Med 2007; 142:51-4. [PMID: 17369901 DOI: 10.1007/s10517-006-0289-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Rabbit antibodies against GluR1 subunit of AMPA glutamate receptors in a concentration of 1 mug/ml significantly increased intracellular Ca(2+)concentration and decreased mitochondrial potential in hippocampal neurons, i.e. produced changes typical of the influence of glutamate in toxic concentrations. In cerebellar neurons rabbit antibodies potentiated glutamate-induced increase in intracellular Ca(2+)concentration and significantly decreased the mitochondrial potential (compared to the level observed after application of glutamate alone). The exposure of cultured cerebellar neurons to antibodies in a concentration of 0.1 mug/ml for 24 h was followed by a 50% decrease in ATP concentration and development of neuronal necrosis. Our results attest to an important role of autoimmune damage to neurons during hyperstimulation of glutamate receptors.
Collapse
Affiliation(s)
- E G Sorokina
- Laboratory of Membranology, Scientific Center for Children's Health, Russian Academy of Medical Sciences, Moscow.
| | | | | | | | | | | |
Collapse
|
6
|
Gorbacheva LR, Storozhevykh TP, Pinelis VG, Ishiwata S, Strukova SM. Modulation of hippocampal neuron survival by thrombin and factor Xa. Biochemistry (Moscow) 2006; 71:1082-9. [PMID: 17125455 DOI: 10.1134/s000629790610004x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Effects of thrombin, factor Xa (FXa), and protease-activated receptor 1 and 2 agonist peptides (PAR1-AP and PAR2-AP) on survival and intracellular Ca2+ homeostasis in hippocampal neuron cultures treated with cytotoxic doses of glutamate were investigated. It is shown that at low concentrations (<or=10 nM) thrombin and FXa protect neurons from glutamate-induced excitotoxicity. Inactivation of the proteases blocked the neuroprotective effect. Using PAR1-AP, PAR2-AP, and PAR1 antagonist, we have demonstrated that the neuroprotective effect of thrombin is mediated through activation of PAR1, whereas the effect of FXa may involve novel subtype(s) of PARs. Unlike FXa, thrombin induced transient intracellular calcium signal in hippocampal neurons, which was mainly mediated via IP(3) receptors of the endoplasmic reticulum. Both of the serine proteases improved the recovery of neuronal Ca2+ homeostasis after glutamate treatment.
Collapse
Affiliation(s)
- L R Gorbacheva
- Department of Human and Animal Physiology, Biological Faculty, Lomonosov Moscow State University, Moscow, 119899, Russia
| | | | | | | | | |
Collapse
|
7
|
Gorbacheva LR, Storozhevykh TP, Kiseleva EV, Pinelis VG, Strukova SM. Proteinase-Activated Type 1 Receptors are Involved in the Mechanism of Protection of Rat Hippocampal Neurons from Glutamate Toxicity. Bull Exp Biol Med 2005; 140:285-8. [PMID: 16307037 DOI: 10.1007/s10517-005-0468-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Survival of cultured rat hippocampal neurons was estimated 4, 24, and 48 h after 15-min exposure to the toxic effect of glutamate under conditions of pre- or coincubation with 10 nM thrombin. Thrombin inhibited glutamate-induced apoptosis in neurons 24 and 48 h after treatment, but had no effect on necrosis. Selective peptide agonist of proteinase-activated type 1 receptors simulated, but receptor antagonist suppressed the neuroprotective effect of thrombin. Our results suggest that peptide antagonist of type 1 receptors play a role in the mechanisms of neuronal protection from glutamate toxicity.
Collapse
Affiliation(s)
- L R Gorbacheva
- Department of Human and Animal Physiology, Biological Faculty, M. V. Lomonosov Moscow State University
| | | | | | | | | |
Collapse
|
8
|
Abstract
The effect of thrombin, an agonist of proteinase-activated receptor (PAR) family, was studied on cultured rat hippocampal neurons. Thrombin in a concentration range of 1 pM - 10 nM induced a transitory dose-dependent increase in intracellular free calcium concentration. Involvement of PAR1 in neural response to thrombin was corroborated in experiments with TFLLRN, a selective synthetic peptide agonist of these receptors. In a calcium-free medium and after treatment with cyclopiazonic acid (inhibitor of Ca(2+)-ATPase in the endoplasmic reticulum) activation of PAR not only mobilized Ca(2+) from intracellular stores, but also induced Ca(2+) entry into the cells. Thrombin decreased Ca(2+) signal triggered by activation of NMDA-subtype glutamate receptors.
Collapse
Affiliation(s)
- E V Kiseleva
- Biological Faculty, M. V. Lomonosov Moscow State University
| | | | | | | | | |
Collapse
|
9
|
Strukova SM, Kiseleva EV, Dugina TN, Glusa E, Storozhevykh TP, Pinelis VG. [Effect of thrombin on survival of hippocampal neurons]. Ross Fiziol Zh Im I M Sechenova 2005; 91:53-60. [PMID: 15773580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The effect of thrombin on the rat hippocampal neurons death in model of neurotoxicity induced by hemoglobin or glutamate, was studied. Thrombin (10 nM) was shown to inhibit 100-mkM glutamate--or 10-mkM hemoglobin-induced apoptosis of the rat hippocampal neurons. With the aid of PAR1 (protease-activated receptor1) agonist peptide and PAR1 antagonist, the PAR1 was found to be necessary for protective action of thrombin in hippocampal neurons in models of neurotoxicity induced by hemoglobin or glutamate. Because the prolonged elevation [Ca2+] ib neurons is a critical part of neurodestructive processes in CNS, the effect of thrombin on Ca2+-homeostatis of neurons after its injury by the inducer of neuronal apoptosis: a synthetic agonist of the NMDA receptors N-methyl-D-aspartate (NMDA), was studied. We hypothesized that thrombin via receptors PAR may prove to be neuroprotective for the hippocampus. Thrombin was shown to stimulate via PAR1 a transient increase in [Ca2+] in neurons in a concentration-dependent manner. Thrombin (1 nM) decreased the [Ca2+] signal induced by activation of the NMDA-subtype of glutamate receptors. This thrombin effect may be one of the reasons of the protective action of thrombin in hippocampal neurons.
Collapse
|
10
|
Storozhevykh TP, Pinelis VG, Vinskaya NP, Surin AM, Khodorov BI. The leading role of membrane Ca(2+)-ATPase in recovery of Ca(2+) homeostasis after glutamate shock. Bull Exp Biol Med 2003; 135:139-42. [PMID: 12802418 DOI: 10.1023/a:1023811613109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2002] [Indexed: 11/12/2022]
Abstract
Combined blockade of Na(+)/Ca(2+) exchange, Ca(2+) uptake by mitochondria and endoplasmic reticulum usually does not prevent recovery of the basal level of intracellular Ca(2+) after 1-min action of glutamate (100 microM) or K(+) (50 mM). However, replacement of Ca(2+) with Ba(2+), which cannot be transported by Ca(2+)-ATPase, considerably delayed the decrease in intracellular Ba(2+) after its rise caused by glutamate or potassium application in all examined cells, which attest to an important role of Ca(2+)-ATPase in Ca(2+) extrusion after the action of glutamate or K(+).
Collapse
Affiliation(s)
- T P Storozhevykh
- Laboratory of Membranology, Research Center of Children Health, Russian Academy of Medical Sciences, Moscow.
| | | | | | | | | |
Collapse
|
11
|
Khodorov BI, Storozhevykh TP, Surin AM, Yuryavichyus AI, Sorokina EG, Borodin AV, Vinskaya NP, Khaspekov LG, Pinelis VG. The leading role of mitochondrial depolarization in the mechanism of glutamate-induced disruptions in Ca2+ homeostasis. Neurosci Behav Physiol 2002; 32:541-7. [PMID: 12403008 DOI: 10.1023/a:1019819925257] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Data obtained in studies of the nature of the correlation which we have previously observed [10,17] between mitochondrial depolarization and the level of disruption of Ca2+ homeostasis in cultivated brain neuronsare summarized. Experiments were performed on cultured cerebellar granule cells loaded with Fura-2-AM or rhodamine 123 to measure changes in cytoplasmic Ca2+ and mitochondrial potential during pathogenic treatments of the cells. Prolonged exposure to 100 microM glutamate induced a reversible increase in [Ca2+]i, which was accompanied by only a small degree of mitochondrial depolarization. A sharp increase in this mitochondrial depolarization, induced by addition of 3 mM NaCN or 300 microM dinitrophenol (DNP) to the glutamate-containing solution, resulted in further increase in [Ca2+]i, due to blockade of electrophoretic mitochondrial Ca2+ uptake. Prolonged exposure to CN- or DNP in the post-glutamate period maintained [Ca2+]i at a high level until the metabolic inhibitors were removed. In most cells, this plateau was characterized by low sensitivity to removal of external Ca2+, demonstrating that the mechanisms of Ca2+ release from neurons were disrupted. Addition of oligomycin, a blocker of mitochondrial ATP synthase/ATPase, to the solution containing glutamate and CN- or DNP eliminated the post-glutamate plateau. Parallel experiments with direct measurements of intracellular ATP levels ([ATP]) showed that profound mitochondrial depolarization induced by CN- or DNP sharply enhanced the drop in ATP due to glutamate, while oligomycin significantly weakened this effect of the metabolic inhibitors. Analysis of these data led to the conclusion that blockade of mitochondrial Ca2+ uptake and inhibition of ATP synthesis resulted from mitochondrial depolarization and plays a key role in the mechanism disrupting [Ca2+]i homeostasis after toxic exposure to glutamate.
Collapse
Affiliation(s)
- B I Khodorov
- Institute of Pathology and Pathophysiology, Russian Academy of Medical Sciences, Moscow
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Storozhevykh TP, Yuryavichyus AI, Sorokina EG, Pinelis VG. Induction of cyclosporin A-sensitive pore in mitochondria of intact neurons during uncoupling of oxidative phosphorylation. Bull Exp Biol Med 2001; 131:440-3. [PMID: 11550047 DOI: 10.1023/a:1017963629229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2000] [Indexed: 11/12/2022]
Abstract
Using primary cultures of cerebellar granule cells we showed that Ca(2+)transported into neurons under the effect of glutamate is accumulated and stored in mitochondria for a long time. Protonophore FCCP, an uncoupler of oxidative phosphorylation, stimulated the release of Ca(2+)from mitochondria in a calcium-free medium in 81% glutamate-treated cells. Cyclosporin A and ATP-synthase blocker oligomycin decreased the number of cells with FCCP-induced Ca(2+)release to 53 and 12%, respectively. Oligomycin partly prevented glutamate- and FCCP-induced decrease of intracellular ATP level.
Collapse
Affiliation(s)
- T P Storozhevykh
- Laboratory of Membranology, Center of Children Health, Russian Academy of Medical Sciences, Moscow.
| | | | | | | |
Collapse
|
13
|
Khodorov BI, Storozhevykh TP, Surin AM, Iuriavichus AI, Sorokina EG, Borodin AV, Vinskaia NP, Khaspekov LG, Pinelis VG. [The leading role of mitochondrial depolarization in the mechanism of glutamate-induced disorder in Ca(2+)-homeostasis]. Ross Fiziol Zh Im I M Sechenova 2001; 87:459-67. [PMID: 11449973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Digital fluorescence imaging techniques were employed to monitor changes in the cytoplasmic Ca2+ concentration and mitochondrial potential in fura-2 AM or rhodamine-123 loaded individual cerebellar granule cells during and following the Glu exposure. The data obtained suggests that the MD-induced blockade of the mitochondrial Ca2+ uptake and a reversal of the mitochondrial ATP-synthase play a critical role in the mechanism of the glutamate-induced disorder of neuronal Ca2+ homeostasis.
Collapse
Affiliation(s)
- B I Khodorov
- Institute of General Pathology and Pathophysiology, Russian Acad. Med. Sci., Baltiyskaya St., 8, Moscow 125315, Russia
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Strukova SM, Chistov IV, Umarova BA, Dugina TN, Storozhevykh TP, Pinelis VG, Glusa E. Modulation of mast cell activity by a peptide agonist of the thrombin receptor: role of nitric oxide. Biochemistry (Mosc) 1999; 64:658-64. [PMID: 10395981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
The effect of a thrombin receptor agonist peptide (TRAP-6) on the release of nitric oxide (NO) and platelet activating factor (PAF) from resting and calcium-ionophore (A23187)-activated rat peritoneal mast cells (RPMC) was studied using a platelet aggregation bioassay. RPMC spontaneously released NO, which inhibited TRAP-6-, ADP-, and PAF-stimulated platelet aggregation. This effect of NO was abolished by the addition of an NO binding agent, oxyhemoglobin (oxyHb), to the platelet suspension. The RPMC-induced suppression of platelet aggregation was completely inhibited by the NO-synthase inhibitor L-NAME. TRAP-6 and its high affinity analog haTRAP stimulated the rapid release of NO from RPMC. The effect of TRAP-6 was inhibited by pretreatment of the RPMC with L-NAME or with the inhibitor of the constitutive NO-synthase isoform (cNOS) calmidazolium. TRAP-6 inhibited PAF release from A23187-activated RPMC via an NO-dependent mechanism. Platelet aggregation induced by PAF release from activated RPMC was also confirmed in experiments using the PAF receptor antagonist ginkgolide B. Thus, TRAP-6 is a rapidly acting modulator of mast cell reactivity; it stimulates NO release and inhibits PAF secretion.
Collapse
Affiliation(s)
- S M Strukova
- Department of Human and Animal Physiology, School of Biology, Lomonosov Moscow State University, Moscow, 119899, Russia
| | | | | | | | | | | | | |
Collapse
|
15
|
Fadiukova OE, Storozhevykh TP, Pinelis VG, Koshelev VB. [Changes in reactivity of the middle cerebral artery caused by cerebral circulation disturbances of ischemic and hemorrhagic types in rats]. Ross Fiziol Zh Im I M Sechenova 1998; 84:672-8. [PMID: 9805779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Reactivity of the middle cerebral artery (MCA) to serotonin was attenuated in vitro in vessels taken from rats following an audiogenic stress. The MCA reactivity to endothelin remained unchanged. Chronic cerebral ischemia diminished the 5-HT-induced contraction and the contractile responses to endothelin were enhanced. Preliminary hypoxic adaptation decreased the artery sensitivity to endothelin in ischemic animals. The findings suggest that a progressing ischemia may involve changes in reactivity of cerebral vessels whereupon hypoxic adaptation may prove to be protecting the brain from ischemia development.
Collapse
|
16
|
Fadiukova OE, Storozhevykh TP, Pinelis VG, Koshelev VB. [Effects of changes in extracellular pH on the initial tonus of the main artery of the rat brain and its response to serotonin]. Biull Eksp Biol Med 1998; 125:251-3. [PMID: 9606535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
17
|
Fadyukova OE, Storozhevykh TP, Pinelis VG, Koshelev VB. Effect of external pH on initial tone of rat basilar artery and its reactions to serotonin. Bull Exp Biol Med 1998. [DOI: 10.1007/bf02496863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
18
|
Khodorov BI, Fayuk DA, Koshelev SG, Vergun OV, Pinelis VG, Vinskaya NP, Storozhevykh TP, Arsenyeva EN, Khaspekov LG, Lyzhin AP, Isaev N, Victorov IV, Dubinsky JM. Effect of a prolonged glutamate challenge on plasmalemmal calcium permeability in mammalian central neurones. Mn2+ as a tool to study calcium influx pathways. Int J Neurosci 1996; 88:215-41. [PMID: 9076567 DOI: 10.3109/00207459609000616] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The rate of Mn(2+)-induced fluorescence quenching (RFQ) was used as a relative measure of plasma membrane Ca2+ permeability (PCa) in fura-2-loaded cultured hippocampal neurons and cerebellar granule cells during and after protracted (15-30 min) glutamate (GLU) treatment. Some limitations of this method were evaluated using a kinetic model of a competitive binding of Mn2+ and Ca2+ to fura-2 in the cell. In parallel experiment a contribution of Ca2+ influx to the cytoplasmic Ca2+ ([Ca2+]i) was repeatedly examined during and following a prolonged GLU challenge by short-duration "low-Ca2+ trials" (50 microM EGTA) and by measurements of 45Ca2+ uptake. Experiments failed to reveal a putative persistent increase in PCa that earlier was thought to underlie Ca2+ overload of the neuron caused by its toxic GLU treatment. By contrast, a sustained increase of [Ca2+]i was found to be associated with a progressive decrease in PCa and Ca2+ influx both in the period of GLU application and after its termination. These findings give new evidence in favour of the hypothesis that the GLU-induced Ca2+ overload of the neuron mainly from an impairment of its Ca2+ extrusion systems.
Collapse
Affiliation(s)
- B I Khodorov
- Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, Moscow, Russia.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Storozhevykh TP, Sorokina EG, Vinskaya NP, Pinelis VG, Vergun OV, Fayuk DA, Sobolevskiy AI, Khodorov BI. Bepridil exacerbates glutamate-induced deterioration of calcium homeostasis and cultured nerve cell injury. Int J Neurosci 1996; 88:199-214. [PMID: 9076566 DOI: 10.3109/00207459609000615] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Application of 50 microM bepridil (BPD) to cultured nerve cells did not greatly affect the resting cytoplasmic Ca2+ concentration ([Ca2+]i) but caused its pronounced increase both during prolonged glutamate (GLU, 100 microM) treatment and, especially, in the postglutamate period in case of partial [Ca2+]i recovery. In contrast, in cells exhibiting a high [Ca2+]i plateau in the postglutamate period, BPD application either did not cause any additional elevation of [Ca2+]i or caused a very small increase. Under identical conditions replacement of external Na+ by Li+ or N-methyl-D-glucamine (NMDG) either did not change [Ca2+]i or produced a very small increase, strongly indicating that the BPD-evoked Ca2+ responses could not be explained solely by Na+/Ca2+ exchange inhibition but resulted from some other BPD effects. Indeed, in experiments with Rhodamine 123-loaded neurons it has been shown that 50 microM BPD induced prominent mitochondrial depolarization which is known to abolish the mitochondrial Ca2+ uptake. Finally it was revealed that BPD application to the cell culture either in the period of a prolonged (15 min) GLU action or, especially, in the postglutamate period greatly exacerbated delayed neuronal death, apparently due to a complex inhibitory action of the drug on both Ca2+ buffering and Ca2+ extrusion systems.
Collapse
Affiliation(s)
- T P Storozhevykh
- Institute of Pediatrics, Russian Academy of Medical Sciences, Moscow, Russia
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Storozhevykh TP, Pinelis VG, Koshelev VB, Fadiukova OE. [Reactivity of the basilar artery in the brain of Krushinskĭ-Molodkina line rats one day after an audiogenic epileptiform seizure]. Biull Eksp Biol Med 1996; 121:131-4. [PMID: 9026112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
21
|
Pinelis VG, Razdol'kina TI, Sergeeva TV, Gozalishvili TV, Storozhevykh TP, Tsygin AN. [Platelet aggregation and the fibronectin level of the blood in children with chronic glomerulonephritis]. Urol Nefrol (Mosk) 1995:17-9. [PMID: 7571193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We compared platelet aggregation with changes in fibronectin (FN) plasma levels in children with various forms of primary CGN. We found that a rise in platelet aggregation and plasma FN level depends on CGN clinical form, extent of inflammation and sclerotic changes in nephric tissue. The greatest changes occurred in patients with nephrotic CGN and with segmentary glomerulosclerosis.
Collapse
|
22
|
Meerson FZ, Pinelis VG, Koshelev VB, Riasina TV, Storozhevykh TP, Mareeva TB, Arsen'eva EN, Vorontsova EI, Fadiukov OE. [The limiting of hemorrhage in the brain of rats during audiogenic epilepsy by adaptation to a course of electrostimulation]. Biull Eksp Biol Med 1994; 117:127-9. [PMID: 8012010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
23
|
Meerson FZ, Pinelis VG, Koshelev VB, Golubeva LI, Riasina TV, Arsen'eva EN, Krushinskiĭ AL, Storozhevykh TP. [Adaptation to periodic hypoxia restricts subdural hemorrhages in audiogenic epileptiform convulsions in rats]. Biull Eksp Biol Med 1993; 116:572-4. [PMID: 8123803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A potent sound stimulation induces in Krushinskiĭ-Molodkina rats epileptiform seizures associated with increased blood levels of stressor hormones and subdural hemorrhages in the brain. Adaptation to periodic hypoxia carried out in a pressure chamber prolonged twofold the latent period of seizure development and blood hydrocortisone content after seizures. Such adaptation reduced the incidence of subdural hemorrhages and the mean size of these hemorrhages. Adaptation scheme used in our experiments is virtually the same as that clinically used at present in the management of patients with allergic diseases and neuroses.
Collapse
|
24
|
Meerson FZ, Pinelis VG, Kosheley VB, Golubeva LY, Ryasina TV, Arsen'eva EN, Krushinskii AL, Storozhevykh TP. Adaptation to periodic hypoxia restricts subdural hemorrhage during audiogenic epileptic seizures in rats. Bull Exp Biol Med 1993. [DOI: 10.1007/bf00785471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Storozhevykh TP, Zagulova DV, Pinelis VG, Markov KM, Medvedev MA, Baskakov MR, Chabrier EP, Braque P. [The effect of endothelin-1 on vascular adrenoreactivity. The participation of G-proteins and protein kinase C in vascular constriction under the action of endothelin-1]. Biull Eksp Biol Med 1993; 116:374-6. [PMID: 8117954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The experiments performed in endothelin-denuded preparations (the strips of thoracic aorta and perfused tail arteries) showed that: 1) ET-1 exerts dose-dependent and slowly developing contractions and in subthreshold doses it potentiates vasoconstriction reactions to stimulate sympathetic nerve endings or phenylephrine exposure. 2) ion F(-), that activates G-proteins in the cell membranes, at a dose of 2 microM increased about two times the ET-1-induced vasoconstriction. 3) the aortic strip incubation with the protein kinase C inhibitor staurosporin led to a 50% decrease in the contraction amplitude. Results suggest that G proteins and protein kinase C may participate in the development of ET-1 induced vascular smooth muscle contraction.
Collapse
MESH Headings
- Animals
- Aorta/drug effects
- Aorta/physiology
- Endothelins/pharmacology
- Endothelium, Vascular/physiology
- GTP-Binding Proteins/drug effects
- GTP-Binding Proteins/physiology
- In Vitro Techniques
- Muscle Contraction/drug effects
- Muscle Contraction/physiology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- Protein Kinase C/drug effects
- Protein Kinase C/physiology
- Rats
- Rats, Wistar
- Receptors, Adrenergic, alpha/drug effects
- Receptors, Adrenergic, alpha/physiology
- Vasoconstriction/drug effects
- Vasoconstriction/physiology
Collapse
|
26
|
Storozhevykh TP, Zagulova DV, Pinelis VG, Markov KM, Medvedev MA, Baskakov MR, Chabrier EP, Braquet P. Effect of endothelin-1 on the adrenoreactivity of blood vessels and on the participation of G-proteins and protein kinase C in endothelin-1-induced vasoconstriction. Bull Exp Biol Med 1993. [DOI: 10.1007/bf00802838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
27
|
Zagulova DV, Pinelis VG, Markov KM, Storozhevykh TP, Medvedev MA, Baskakov MR, Chabrier EP, Braque P. [The role of extracellular calcium in the vasoconstriction evoked by endothelin-1]. Biull Eksp Biol Med 1993; 116:258-60. [PMID: 8117994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Some mechanisms responsible for extracellular Ca++ entry into rat aortic smooth muscle cells were studied in response to endothelin-1 (ET-1). Isometric tension of de-endothelialized aortic strips was recorded. It was shown that the calcium-free medium or nifedipine blockade of calcium entry diminished responses to ET-1 to 20-30% of the control levels. Depolarization of the specimens with hyperpotassium solution also reduced constriction almost by 50%. When sodium ions were replaced by NMDG in the medium, a response to ET-1 showed a 50% reduction. The findings suggest that the potential-dependent calcium channels of the L-type are involved in cellular calcium entry, the opening of the channels depending upon the entry of Na+.
Collapse
|
28
|
Zagulova DV, Pinelis VG, Markov KM, Storozhevykh TP, Medvedev MA, Baskakov MR, Chabrie EP, Braque P. Role of extracellular calcium in endothelin-1-induced vasoconstriction. Bull Exp Biol Med 1993. [DOI: 10.1007/bf00820225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
29
|
Rodionov IM, Tarasova OS, Storozhevykh TP, Kuzenkov VS, Pinelis VG, Sokolova RI, Rudneva LF, Markov KM, Koshelev VB. [The effect of captopril on the arterial pressure, structural resistance and vascular reactivity of the kidney in rats with nephrogenic hypertension]. Fiziol Zh Im I M Sechenova 1993; 79:41-9. [PMID: 8252100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The angiotensin-converting enzyme inhibiting agent captopryl suppressed a moderate hypertension in rats with pyelonephritis and with ureteral obstruction, but not in rats with ureteral obstruction combined with the renal artery constriction. The suppression of the hypertension was accompanied by a reversion of structural alterations in the blood vessels.
Collapse
|
30
|
Ashmarin IP, Storozhevykh TP, Vakulina OP, Pinelis VG. [Change in systemic hemodynamics after acute administration of diazepam binding inhibitor (DBI) and after autoimmunization against DBI]. Biull Eksp Biol Med 1993; 115:481-3. [PMID: 8043827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Endogenous peptide DBI inhibits the activity of HABA-ergic system and that is why can be a factor of arterial hypertension development. We investigated DBI influence on cardiac index (CI), arterial pressure (AP) and heart rate (HR) in rats. I.v. administration of DBI caused dose--dependent increase in CI, AP but HR did not change. High dose (150 mg/kg) caused a biphasic answer: hyperkinetic reaction reversed to cardiodepressive one. Long-term immunization against DBI led to decrease of AP and systemic vessel's resistance.
Collapse
|
31
|
Koshelev VB, Tarasova OS, Storozhevykh TP, Baranov VS, Pinelis VG, Rodionov IM. [Changes in the systemic hemodynamics and the vascular bed of the skeletal muscles in rats adapted to hypoxia]. Fiziol Zh SSSR Im I M Sechenova 1991; 77:123-9. [PMID: 1666594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In adult rats after 2 weeks of adaptation to simulated altitude cardiac output was increased by 22% and total peripheral resistance was decreased by the same value. The structural component of peripheral vascular resistance was decreased in rats which were trained 18-20 hrs during 2 weeks and in those trained daily for only 2 hrs. In hypoxically trained rats, the vessel reactivity to sympathetic stimulation was decreased, but to exogenous noradrenaline it was unchanged. Angiogenesis seems to be one of the mechanisms which increase the stability of oxygen transport in microcirculation.
Collapse
|
32
|
Rodionov IM, Iarygin VN, Markov KM, Pinelis VG, Lakgueva FK, Tarasova OS, Sokolova IA, Storozhevykh TP, Koshelev VB. [Increased number of sympathetic neurons in the superior cervical ganglia of rats of SHR and Wistar-Kyoto strains as compared with Wistar rats]. Biull Eksp Biol Med 1989; 108:620-2. [PMID: 2633833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
With histological technique increased number of sympathetic neurons in cranial ganglia of SHR and Wistar-Kyoto rats in comparison with Wistar line has been shown. The resistance to hypobaric hypoxia (simulated altitude 12000m) was also enhanced in SHR and WKY rats.
Collapse
|
33
|
Rodionov IM, Yarygin VN, Markov KM, Pinelis VG, Lakgueva FK, Tarasova OS, Sokolova IA, Storozhevykh TP, Koshelev VB. Sympathetic neurons in the superior cervical ganglion are more numerous in SHR and Wistar-Kyoto rats than in wistar rats. Bull Exp Biol Med 1989. [DOI: 10.1007/bf00839715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
34
|
Storozhevykh TP, Zadkova GF, Markov KM. [The vascular response of spontaneously hypertensive and normotensive rats with diabetes mellitus]. Probl Endokrinol (Mosk) 1989; 35:68-72. [PMID: 2717581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Streptozotocin-induced diabetes caused an increase in AP and reactivity to noradrenaline in perfused caudal artery of normotensive rats (WKY). In spontaneously hypertensive rats (SHR) diabetes led to an increase in reactivity not only to noradrenaline but also to alpha 1-agonist phenylephrine; a response to endothelium-dependent agent acetylcholine was decreased. Alterations in function of the vascular endothelium may be one of the factors causing elevation of vasoconstriction in diabetes mellitus.
Collapse
|
35
|
Kuznetsova LV, Storozhevykh TP, Pinelis VG, Sokolova IA, Markov KM. [Changes in systemic hemodynamics and vascular resistance in unilaterally nephrectomized rats with vasorenal hypertension]. Patol Fiziol Eksp Ter 1989:32-6. [PMID: 2717229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Cardiac output (CO), arterial pressure (AP), and total peripheral resistance of the vessels were studied in rats on the 1st, 5th, and 20th day after the onset of one-kidney vasorenal hypertension. The CO increased by 72% and the peripheral resistance reduced on the 1st day. In stable increase of AD the CO did not differ from the control level. In extracorporeal perfusion of the hindquarters of hypertensive rats in the indicated periods increased reactivity of the vessels to noradrenaline and resistance at maximal dilatation were revealed. These changes were encountered even before statistically significant increase in AP (5th day) and increased with the gradual development of hypertension.
Collapse
|