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Mise en évidence et évolution, au cours du cycle biologique, de neurones producteurs d'une substance apparentée à la motiline porcine dans le ganglion supraoesophagien de la sangsue <i>Theromyzon tessulatum</i>
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1989
Year
OocyteAu CoursPorcine MotilinNeurotransmissionReproductive BiologyCellular NeurobiologySensory SystemsCellular PhysiologyEmbryologyGanglion CelléVidence Et éVolutionHealth SciencesMedicineMorphogenesisEmbryonic DevelopmentNervous SystemChoroid PlexusBiologyDevelopmental BiologyNeurophysiologyNeuroanatomyOogenesisPhysiologyNeuroscienceCentral Nervous SystemTheromyzon TessulatumCycle BiologiqueLife CyclePineal Gland
The life cycle of Theromyzon tessulatum has been divided into stages defined on the basis of feeding pattern and reproductive activity. The use of an antiserum raised against porcine motilin demonstrated the presence of immunoreactive cells and fibers in the supraesophageal ganglion throughout the life of the leech. Immunopositive fibers are present in the neurohemal area of the dorsal commissure. The highest number of immunopositive neurons is found during stages 3B, 3C, and 3D, which precede egg-laying. The control of oogenesis by a substance related to porcine motilin is postulated.