Pierrick Poisbeau

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Ayikoe Guy Mensah-Nyagan28
Rémy Schlichter26
Christine Patte-Mensah18
Robert H Purdy16
Steven Mennerick15
25Rémy Schlichter
23Michel Barrot
16Elizabeth I Tietz
13Hanns Ulrich Zeilhofer
12Yannick Goumon

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1994
2016
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GlyR alpha3: an essential target for spinal PGE2-mediated inflammatory pain sensitization.
Prostaglandin E2 (PGE2) is a crucial mediator of inflammatory pain sensitization. Here, we demonstrate that inhibition of a specific glycine receptor subtype (GlyR alpha3) by PGE2-induced receptor phosphorylation underlies central inflammatory pain sensitization. We show that GlyR alpha3 is distinctly expressed in superficial layers of the spinal cord… (More)
Region-specific developmental specialization of GABA-glycine cosynapses in laminas I-II of the rat spinal dorsal horn.
The spinal dorsal horn is the first level of the CNS in which nociceptive input from sensory afferents is integrated and transmitted. Although inhibitory control in this region has a crucial impact on pain transmission, the respective contribution of GABA and glycine to this inhibition remains elusive. We have previously documented co-release of GABA and… (More)
Silent GABAA synapses during flurazepam withdrawal are region-specific in the hippocampal formation.
Whole-cell patch-clamp recordings were made from CA1 pyramidal and dentate gyrus granule cells (GCs) in hippocampal slices to assess the effects of withdrawal from chronic flurazepam (FRZ) treatment on the function of synaptic GABAA receptors. In slices from control rats, acute perfusion of FRZ (30 microM) increased the monoexponential decay time constant… (More)
Modulation of GABAA receptor-mediated IPSCs by neuroactive steroids in a rat hypothalamo-hypophyseal coculture model.
1. We have used the whole-cell configuration of the patch-clamp technique to investigate the effects of neuroactive steroids on GABAA receptor-mediated synaptic transmission between rat hypothalamic neurones and pituitary intermediate lobe (IL) cells grown in coculture. In order to discriminate between possible pre- and postsynaptic sites of action, the… (More)
Modulation of synaptic GABAA receptor function by PKA and PKC in adult hippocampal neurons.
Several protein kinases are known to phosphorylate Ser/Thr residues of certain GABAA receptor subunits. Yet, the effect of phosphorylation on GABAA receptor function in neurons remains controversial, and the functional consequences of phosphorylating synaptic GABAA receptors of adult CNS neurons are poorly understood. We used whole-cell patch-clamp… (More)
Modulation of GABAergic synaptic transmission by the non-benzodiazepine anxiolytic etifoxine.
We have investigated the effects of 2-ethylamino-6-chloro-4-methyl-4-phenyl-4H-3,1-benzoxazine hydrochloride (etifoxine) on GABA(A) receptor function. Etifoxine displaced [(35)S]TBPS (t-butylbicyclophosphorothionate) from GABA(A) receptors of rat cortical membranes with an IC(50) of 6.7+/-0.8 microM and [(3)H]PK11195 from peripheral (mitochondrial)-type… (More)
Production of 5alpha-reduced neurosteroids is developmentally regulated and shapes GABA(A) miniature IPSCs in lamina II of the spinal cord.
In lamina II of the spinal dorsal horn, synaptic inhibition mediated by ionotropic GABA(A) and glycine receptors contributes to the integration of peripheral nociceptive messages. Whole-cell patch-clamp recordings were performed from lamina II neurons in spinal cord slices to study the properties of miniature IPSCs (mIPSCs) mediated by activation of GABA(A)… (More)
Differentiating thermal allodynia and hyperalgesia using dynamic hot and cold plate in rodents.
UNLABELLED In animal studies, thermal sensitivity is mostly evaluated on the basis of nociceptive reaction latencies in response to a given thermal aversive stimulus. However, these techniques may be inappropriate to differentiate allodynia from hyperalgesia or to provide information differentiating the activation of nociceptor subtypes. The recent… (More)
Pharmacological plasticity of GABA(A) receptors at dentate gyrus synapses in a rat model of temporal lobe epilepsy.
In the lithium-pilocarpine model (Li-pilocarpine) of temporal lobe epilepsy, GABA(A) receptor-mediated inhibitory postsynaptic currents (GABA(A) IPSCs) were recorded in dentate gyrus granule cells (GCs) from adult rat hippocampal slices. The properties of GABA(A) IPSCs were compared before and after superfusion of modulators in control conditions (Li-saline… (More)
Oxytocin-induced antinociception in the spinal cord is mediated by a subpopulation of glutamatergic neurons in lamina I-II which amplify GABAergic inhibition
BACKGROUND Recent evidence suggests that oxytocin (OT), secreted in the superficial spinal cord dorsal horn by descending axons of paraventricular hypothalamic nucleus (PVN) neurons, produces antinociception and analgesia. The spinal mechanism of OT is, however, still unclear and requires further investigation. We have used patch clamp recording of lamina… (More)