Publications

Dernière publication 01/06/2011

Intrinsic membrane properties of spinal dorsal horn neurones modulate nociceptiv

The dorsal horn of the spinal cord is the first central relay where nociceptive inputs are processed. Based on the expression and modulation of...

Array
(
    [id_prestablog_news] => 331
    [id_shop] => 1
    [date] => 2011-06-01 00:00:00
    [date_modification] => 2024-02-09 14:15:11
    [langues] => ["1","2"]
    [actif] => 1
    [slide] => 0
    [url_redirect] => 
    [average_rating] => 
    [number_rating] => 
    [author_id] => 1
    [featured] => 0
    [ishero] => 0
    [prim_key] => 658
    [id_lang] => 2
    [title] => Intrinsic membrane properties of spinal dorsal horn neurones modulate nociceptiv
    [paragraph] => Intrinsic membrane properties of spinal dorsal horn neurones modulate nociceptive information processing in vivo. 
    [content] => 
Authors
C. Reali, P. Fossat, M. Landry, R. Russo, F. Nagy. 

 Lab
Université de Bordeaux, Neurocentre Magendie, Bordeaux, France.
Journal
The Journal of Physiology
Abstract
The dorsal horn of the spinal cord is the first central relay where nociceptive inputs are processed. Based on the expression and modulation of intrinsic electrophysiological properties in in vitro slice preparations, dorsal horn neurones (DHNs) display different discharge patterns (tonic, plateau or rhythmic), which shape the neurone's response to sensory inputs. However, it is unclear whether intrinsic properties play any role in sensory processing in vivo. Using in vivo patch clamp recordings in the adult rat, we here examine whether these intrinsic properties are present, and to what extent they determine the DHN response to natural stimulation. We focused primarily on wide dynamic range neurones in deep laminae. These cells displayed a multicomponent peripheral receptive field, comprising an excitatory firing zone, a low-probability firing fringe, and adjacent inhibitory zones. Deep DHNs presented similar intrinsic properties to those observed in vitro, including plateau potentials. These plateaus, underlying high frequency accelerating discharges and after-discharges, were triggered by mechanical stimulation of the excitatory receptive field. Persistent activities induced by activation of plateau potentials were interrupted by stimulation of peripheral inhibitory zones. Moreover, we show that plateau activation is necessary for the expression of windup in response to repetitive, nociceptive stimulation. Finally, using the spinal nerve ligation model of neuropathy, we demonstrate a significant increase in the proportion of plateau neurones in deep dorsal laminae. Our data, therefore, establish that intrinsic amplification properties are expressed within intact spinal circuits and suggest their involvement in neuropathy-induced hyperexcitability of deep DHNs.
BIOSEB Instruments Used
Electronic Von Frey 4 (BIO-EVF4),Electronic Von Frey 5 with embedded camera (BIO-EVF5)

Keywords/Topics
Douleurs générales; Douleur
    [meta_description] => 
    [meta_keywords] => http://jp.physoc.org/content/589/11/2733.long
    [meta_title] => 
    [link_rewrite] => intrinsic-membrane-properties-of-spinal-dorsal-horn-neurones-modulate-nociceptive-information-processing-in-vivo--
    [actif_langue] => 1
    [read] => 1137
    [count_comments] => 0
    [id] => 331
    [categories] => Array
        (
            [10] => Array
                (
                    [id_prestablog_categorie] => 10
                    [title] => Douleur
                    [link_rewrite] => Douleur
                )

            [27] => Array
                (
                    [id_prestablog_categorie] => 27
                    [title] => Douleurs générales
                    [link_rewrite] => Douleurs-generales
                )

            [2] => Array
                (
                    [id_prestablog_categorie] => 2
                    [title] => Publications
                    [link_rewrite] => publications
                )

        )

    [authors] => 
    [paragraph_crop] => Intrinsic membrane properties of spinal dorsal horn neurones modulate nociceptive information [...]
    [link_for_unique] => 1
    [products_liaison] => Array
        (
            [1859] => Array
                (
                    [name] => Von Frey Électronique - Sans Fil
                    [description_short] => 
Une solution rapide pour déterminer le seuil de sensibilité à la douleur mécanique chez les rongeurs (rats et souris). Maintenant en version sans-fil, pour être libéré des câbles!

Cet instrument électronique précis et simple d'utilisation est le test de référence pour vos recherches en analgésie, nociception, neuropathies et douleurs post-opératoires

                    [thumb] => 
                    [img_empty] => /var/www/vhosts/de3310.ispfr.net/bioseb2024/modules/prestablog/views/img/product_link_white.jpg
                    [image_presente] => 1
                    [link] => https://bioseb.com/fr/douleur-allodyniehyperalgesie-mecanique/1859-electronic-von-frey-4.html
                )

            [1860] => Array
                (
                    [name] => Von Frey Électronique 5 avec caméra intégrée
                    [description_short] => 

En tant que version électronique du classique esthésiomètre à filaments de Von Frey, la dernière évolution de l’instrument électronique Von Frey de Bioseb, conçu pour déterminer le seuil de sensibilité mécanique chez les rongeurs (rats et souris) par stimulation sous la patte, est un outil indispensable pour vos recherches sur l’hyperalgésie et l’allodynie. En mesurant et en enregistrant la force à laquelle l’animal présente un réflexe de retrait de la patte, il est possible d’étudier les pathologies liées à la réponse sensorielle ainsi qu’à l’hyper- ou l’hypoesthésie.
L'EVF5 intègre une caméra embarquée au niveau de la zone de stimulation et fonctionne avec un nouveau logiciel dédié révolutionnaire

                    [thumb] => 
                    [img_empty] => /var/www/vhosts/de3310.ispfr.net/bioseb2024/modules/prestablog/views/img/product_link_white.jpg
                    [image_presente] => 1
                    [link] => https://bioseb.com/fr/douleur-allodyniehyperalgesie-mecanique/1860-electronic-von-frey-5-with-embedded-camera.html
                )

        )

)
1