Abstract：
:The unique noradrenergic and specific serotonergic antidepressant mirtazapine acts antinociceptive. It is optically active and currently marketed as racemate. In an animal model of acute pain it has been shown that the enantiomers exhibit differential effects: the R(-)-enantiomer showed anti-, the S(+)-enantiomer pronociceptive properties while the racemate acted antinociceptive at low doses and profoundly pronociceptive after high-dose application. Aim of the present study was to evaluate potential enantioselective effects of mirtazapine in neuropathic pain. In a chronic constriction injury model of neuropathic pain, Wistar rats were injected (+/-)-mirtazapine and the enantiomers intrathecally. All substances were dosed between 0.001 and 1mg/kg and compared to vehicle in a randomized and blinded approach. Thermal hyperalgesia and mechanical allodynia were assessed. In contrast to the acute pain results, only racemic mirtazapine exerted significant sustained analgesic effects up to 48 h. Antinociception was observed at all dosages with a maximum in the range of 0.01 mg/kg. Surprisingly, neither enantiomer was pro- nor antinociceptive at any dose or time. Our findings suggest that the synergism of both enantiomers is required to evoke a significant analgesic effect for the treatment of neuropathic pain. Our study gained no evidence for the use of either R(-) nor S(+)-mirtazapine alone. Due to the unique characteristics of (+/-)-mirtazapine and its proven efficacy in acute pain our results suggest that racemic mirtazapine may be a particularly useful antidepressant in the adjunctive treatment of chronic neuropathic pain states and could provide additional benefit to current therapeutic options.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Muth-Selbach U,Hermanns H,Driehsen C,Lipfert P,Freynhagen Rdoi
10.1016/j.brainresbull.2008.12.015subject
Has Abstractpub_date
2009-04-06 00:00:00pages
63-8issue
1eissn
0361-9230issn
1873-2747pii
S0361-9230(08)00427-9journal_volume
79pub_type
杂志文章abstract：:Taurine's site of action within the central nervous system was localized by studying its effect on prolactin secretion following the microinfusion of 125 nmoles of this amino acid into discrete regions of the brain. Taurine was found to stimulate prolactin secretion only when microinfused into the arcuate nucleus of t...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(84)90007-8
更新日期：1984-07-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(83)90079-5
更新日期：1983-01-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 传,历史文章,杂志文章,评审
doi：10.1016/s0361-9230(98)00080-x
更新日期：1998-10-01 00:00:00
abstract：:The non-adenosine nucleoside guanosine (Guo) was demonstrated to decrease quinolinic acid(QA)-induced seizures, spontaneously emerged absence epileptic seizures and lipopolysaccharide(LPS)-evoked induction of absence epileptic seizures suggesting its antiepileptic potential. It was also described previously that intra...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2016.05.001
更新日期：2016-06-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(98)00048-3
更新日期：1998-07-15 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)00765-1
更新日期：2002-04-01 00:00:00
abstract：:Our previous study demonstrated that single intrathecal (i.t.) application of fluorocitrate, a glial metabolic inhibitor, synergized electroacupuncture (EA) antagonizing behavioral hypersensitivity in complete Freund's adjuvant (CFA)-induced monoarthritic rat. To further investigate the relationship between spinal gli...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2007.07.027
更新日期：2008-01-31 00:00:00
abstract：:In 1906, the first Nobel prize in the neurosciences was awarded jointly to Camillo Golgi and Santiago Ramón y Cajal in recognition of their work on the structure of the nervous system. The Nobel Prize in Physiology or Medicine linked together forever these two scientists. One century later, what remains of their oppos...
journal_title：Brain research bulletin
pub_type： 传,历史文章,杂志文章
doi：10.1016/j.brainresbull.2006.09.022
更新日期：2007-01-09 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2003.08.004
更新日期：2003-10-15 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2020.07.011
更新日期：2020-10-01 00:00:00
abstract：:Creutzfeldt-Jakob disease (CJD) and other transmissible spongiform encephalopathies (TSEs) are characterised by the accumulation of a pathological conformer of PrP, named PrPsc. Molecular weight and glycosylation of the protease-resistant core of PrPsc (PrP27-30) are heterogeneous in different forms of TSEs. We analys...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(99)00077-5
更新日期：1999-08-01 00:00:00
abstract：:The vertebrate neural tube consists of a series of neuromeres along its anteroposterior axis. Between amphioxus that possesses no neuromeres and gnathostomes, the lamprey occupies a critical position in the phylogeny for the origin of the segmented brain. To clarify the rhombomeric configuration of the Japanese lampre...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/s0361-9230(01)00669-4
更新日期：2002-02-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2018.11.026
更新日期：2019-03-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90256-w
更新日期：1992-05-01 00:00:00
abstract：:The medial preoptic area is a key structure in the neural control of reproduction. Considerable evidence has accumulated indicating that glutamatergic innervation of the area plays an important role in this control. Sources of the glutamatergic input are unknown. Present investigations were aimed at studying this ques...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(03)00180-1
更新日期：2003-08-30 00:00:00
abstract：:It is generally assumed that the primary response of the rat flash evoked potential (FEP) is activated by a retino-geniculate path, and that the secondary response reflects input to the cortex by way of the superior colliculus (SC) or other brainstem structures. In the present study, male Long-Evans rats were implante...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(86)90037-7
更新日期：1986-02-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2013.05.006
更新日期：2013-08-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(01)00473-7
更新日期：2001-05-15 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(84)90024-8
更新日期：1984-07-01 00:00:00
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pub_type： 杂志文章
doi：10.1016/j.brainresbull.2007.07.003
更新日期：2008-01-31 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(86)90217-0
更新日期：1986-10-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90038-y
更新日期：1992-03-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(82)90050-8
更新日期：1982-02-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2009.12.010
更新日期：2010-04-05 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(99)00069-6
更新日期：1999-09-15 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.2009.06.006
更新日期：2009-10-28 00:00:00
abstract：:The hypothalamic suprachiasmatic nucleus (SCN) and the thalamic intergeniculate leaflet (IGL) are considered to be the main centers of the mammalian circadian timing system. In primates, the IGL is included as part of the pregeniculate nucleus (PGN), a cell group located mediodorsally to the dorsal lateral geniculate ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2008.02.028
更新日期：2008-07-01 00:00:00
abstract：:Cellular and molecular mechanisms involved in the generation of seizures and the magnitude of neural cells injury are not fully understood. We evaluated astrocyte and/or neuronal injury in rats in the pentylenetetrazol model of acute seizures by measuring S100B and NSE levels in cerebrospinal fluid. Additionally, we d...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2004.07.006
更新日期：2004-09-30 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2004.12.007
更新日期：2005-03-15 00:00:00
abstract：:We studied mitochondria in the satellite cell sheaths which envelope the spinal ganglion neurons of rabbits aged 12, 42, and 79 months. While the mean cytoplasmic volume of satellite cell sheaths did not change significantly with age, the mean percentage of cytoplasmic volume occupied by mitochondria decreased with ag...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(03)00101-1
更新日期：2003-07-15 00:00:00
