Abstract:
:Multiple lines of investigation have explored the role of dopaminergic systems in mental depression. Chronic treatment with antidepressant drugs has been reported to alter dopaminergic neurotransmission, most notably a sensitization of behavioural responses to agonists acting at D2/D3 dopamine receptors within the nucleus accumbens. Recent clinical evidences have shown that ropinirole, a D2/D3 dopamine receptor agonist, augments the action of various standard antidepressant drugs in treatment-resistant depression. The present study was undertaken to elucidate the possible mechanism of antidepressant action of ropinirole employing various behavioral paradigms of despair supported by the measurements of neurochemical changes in the tissue contents of dopamine (DA) and serotonin (5-HT) in the whole brain using high-performance-liquid chromatography (HPLC) with electrochemical detectors (ECD). In the mouse forced swim test (FST) or tail-suspension test (TST), ropinirole (1-10 mg/kg, i.p.) produced S-shaped dose-response curve in the percentage decrease in immobility period. Compared with vehicle, ropinirole (10 mg/kg., i.p.) had a significant anti-immobility effect without affecting locomotor activity. The reduction in the immobility period elicited by ropinirole (10 mg/kg, i.p.) in the FST was reversed by dopaminergic and sigma receptor antagonist, haloperidol (0.5 mg/kg, i.p.), and specific D2 dopamine receptor antagonist sulpiride (5 mg/kg i.p.), but not by SCH 23390 (0.5 mg/kg i.p), a D1 dopamine receptor antagonist. Rimcazole (5 mg/kg i.p.) (a sigma receptor antagonist), progesterone (10 mg/kg i.p.) (a sigma receptor antagonistic neurosteroid), BD 1047 (1 mg/kg i.p.) (a novel sigma receptor antagonist with preferential affinity for sigma-1 sites) also reversed the anti-immobility effect of ropinirole (10 mg/kg i.p.). The neurochemical studies of whole brain revealed that ropinirole at 10 mg/kg i.p. did not affect the tissue levels of dopamine but significantly increased serotonin levels. The study indicated that ropinirole possessed anti-immobility activity in FST by altering dopaminergic, serotonergic or sigma receptor function.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Dhir A,Kulkarni SKdoi
10.1016/j.brainresbull.2007.05.004subject
Has Abstractpub_date
2007-09-14 00:00:00pages
58-65issue
1-3eissn
0361-9230issn
1873-2747pii
S0361-9230(07)00157-8journal_volume
74pub_type
杂志文章abstract::Aluminium is highly neurotoxic and inhibits prenatal and postnatal development of the brain in humans and experimental animals. However, the incorporation of aluminium into the brain of fetuses and sucklings during gestation and lactation has not been well clarified because aluminium lacks a suitable isotope for a tra...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(01)00509-3
更新日期:2001-05-15 00:00:00
abstract::Rats self-administered cocaine or received saline during 3 daily 5 h sessions and were euthanized 1 h after the final session. Quantitative in situ hybridization revealed that cocaine self-administration increased levels of preprodynorphin, but not preproenkephalin, c-fos, or zif/268 mRNAs in a patchy pattern in the d...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(95)00049-k
更新日期:1995-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(93)90091-o
更新日期:1993-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(02)00948-6
更新日期:2003-02-15 00:00:00
abstract::Abnormalities of the ionotropic glutamate receptors (N-methyl-D-aspartate, alpha-amino-3-hydroxy-5-methyl-isoxazole-4-propionic acid [AMPA], and kainate) have been reported in the brain in schizophrenia, although in complex, region-specific patterns. While limbic cortex and medial temporal lobe structures have been mo...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(01)00523-8
更新日期:2001-07-15 00:00:00
abstract::Electrophysiological responses to olfactory and gustatory stimuli were recorded in the same neural elements in the parabrachial nuclei (PbN) of rats under Flaxedil. Responses to olfactory stimuli varied in temporal pattern and magnitude from responses to gustatory stimuli. Intravenous infusion of Nembutal while record...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(85)90219-9
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abstract::We studied the ontogeny of muscarinic depression in the developing rat visual cortex using carbachol (a nonhydrolyzable cholinergic agonist) application to neocortical slices obtained from four postnatal age groups: 9-10 days, 15 days, 30-40 days and 18 months. Carbachol suppressed the evoked synaptic response of laye...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(91)90228-c
更新日期:1991-02-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章,评审
doi:10.1016/s0361-9230(97)00310-9
更新日期:1997-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2008.12.013
更新日期:2009-04-06 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2007.11.016
更新日期:2008-03-28 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2020.12.009
更新日期:2020-12-28 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(92)90180-6
更新日期:1992-02-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2014.04.002
更新日期:2014-05-01 00:00:00
abstract::The question of whether neurons versus fibers of passage in the medial prefrontal cortex (MPC) are essential in maintaining self-stimulation of this same area of the brain was examined. Rats were prepared with electrode-guide cannulae implanted stereotaxically to rest within MPC. A micro-injection of (KA), 10 nmol/1.0...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(85)90141-8
更新日期:1985-08-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章,评审
doi:10.1016/s0361-9230(01)00613-x
更新日期:2001-11-15 00:00:00
abstract::The role of calmodulin (CaM) in organelle motility (fast axonal transport) in the axoplasm of the squid giant axon was evaluated directly using video-enhanced microscopy. Addition of 6 microM CaM to extruded squid axoplasm produced a 2.6-fold increase in the number of organelles moving per minute per unit area of axop...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(94)00256-8
更新日期:1995-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(83)90053-9
更新日期:1983-07-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(84)90223-5
更新日期:1984-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章,评审
doi:10.1016/j.brainresbull.2017.02.001
更新日期:2018-01-01 00:00:00
abstract::The presence of intrinsic neurons in the hypothalamus containing the enzyme phenylethanolamine N-methyltransferase (PNMT), was investigated by selective destruction of the local cell bodies with kainic acid (KA), a potent excitotoxin. The unilateral stereotaxic injection of 2 micrograms of KA into the lateral hypothal...
journal_title:Brain research bulletin
pub_type: 杂志文章
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更新日期:1989-12-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2020.06.001
更新日期:2020-09-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(99)00011-8
更新日期:1999-03-01 00:00:00
abstract::Sporadic Alzheimer's disease (AD) is a multifactorial neurodegenerative disorder affected by amyloid and vascular pathogenesis. Brain insulin resistance (BIR) has been suggested as one of the pathomechanisms of sporadic AD. We investigated how the amyloid and vascular pathogenesis of AD interacts with BIR. We examined...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2020.02.012
更新日期:2020-05-01 00:00:00
abstract::Aged (25-27 months) Long-Evans female rats were distinguished according to whether they showed no significant impairment (AU), moderate impairment (AMI), or severe impairment (ASI) in a spatial reference-memory task. Young (3-5 months) rats served as controls. Electrically evoked overflow of tritium was assessed in hi...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(03)00042-x
更新日期:2003-05-15 00:00:00
abstract::When applied by iontophoresis onto single sympathetic preganglionic neurones in the intermediolateral nucleus of segments T1-T3 in the cat, oxytocin and vasopressin each had an excitatory effect. This effect consisted of a prolonged (30-300 sec) after-discharge following termination of application. These results indic...
journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(84)90201-6
更新日期:1984-11-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(92)90071-5
更新日期:1992-09-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(99)00201-4
更新日期:2000-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/s0361-9230(98)00122-1
更新日期:1998-11-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2005.11.007
更新日期:2006-06-15 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(88)90119-0
更新日期:1988-07-01 00:00:00