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  • Title: 5-Hydroxytryptamine, substance P and thyrotropin-releasing hormone synapses in the intermediolateral cell column of the rat thoracic spinal cord.
    Author: Poulat P, Marlier L, Rajaofetra N, Privat A.
    Journal: Neurosci Lett; 1992 Feb 17; 136(1):19-22. PubMed ID: 1378952.
    Abstract:
    Serotonin-, substance P-, and thyrotropin-releasing hormone-immunoreactive profiles were studied in the intermediolateral cell column at the thoracic level of the rat spinal cord with light- and electron-microscopic immunocytochemistry. For each transmitter, a dense immunoreactive deposit was observed with the light microscope. At ultrastructural level, morphologically identified synapses amounted to 47% of all serotonergic varicosities, to 49% for substance P and 50% for thyrotropin-releasing hormone. Synapses appeared both symmetrical and asymmetrical. In each case, these synapses were mainly axodendritic (98%). These synaptic connections could mediate the physiological influence of these 3 substances in the spinal cord on the cardiovascular system.
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