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Eliava, Marina; Melchior, Meggane; Knobloch-Bollmann, H. Sophie; Wahis, Jérôme; da Silva Gouveia, Miriam; Tang, Yan; Ciobanu, Alexandru Cristian; Triana del Rio, Rodrigo; Roth, Lena C.; Althammer, Ferdinand; Chavant, Virginie; Goumon, Yannick; Gruber, Tim; Petit-Demoulière, Nathalie; Busnelli, Marta; Chini, Bice; Tan, Linette L.; Mitre, Mariela; Froemke, Robert C.; Chao, Moses V.; Giese, Günter; Sprengel, Rolf; Kuner, Rohini; Poisbeau, Pierrick; Seeburg, Peter H.; Stoop, Ron; Charlet, Alexandre; Grinevich, Valery
Neuron, 03/2016, Letnik: 89, Številka: 6Journal Article
Oxytocin (OT) is a neuropeptide elaborated by the hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei. Magnocellular OT neurons of these nuclei innervate numerous forebrain regions and release OT into the blood from the posterior pituitary. The PVN also harbors parvocellular OT cells that project to the brainstem and spinal cord, but their function has not been directly assessed. Here, we identified a subset of approximately 30 parvocellular OT neurons, with collateral projections onto magnocellular OT neurons and neurons of deep layers of the spinal cord. Evoked OT release from these OT neurons suppresses nociception and promotes analgesia in an animal model of inflammatory pain. Our findings identify a new population of OT neurons that modulates nociception in a two tier process: (1) directly by release of OT from axons onto sensory spinal cord neurons and inhibiting their activity and (2) indirectly by stimulating OT release from SON neurons into the periphery. •Thirty parvocellular oxytocin neurons (ParvOT) alleviate acute pain•ParvOT project to WDR sensory neurons in spinal cord (SC)•ParvOT activate OT release from magnocellular OT neurons (magnOT)•Dual pain suppression by peripheral magnOT and central SC OT Eliava, Melchior, Knobloch-Bollmann, Wahis et al. demonstrate that thirty specialized oxytocin neurons in the rat hypothalamus coordinate activity of oxytocin neurons and deep dorsal horn spinal processing, as revealed by the repression of nociceptive messages and the promotion of analgesia.
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