[Dynamics, following axotomy, of the A1 and A2 median protocerebral neurosecretory cells of the African locust. I. Histophysiological study].
In the African locust, the secretory dynamics of the A1 and A2 median protocerebral neurosecretory cells (M-NSC) is evaluated by the product content and the gonadotropic action of these cells. The axotomy of the A1 and A2 M-NSC disturbes their secretory dynamics. The axonal regeneration, if it leads to a reconnexion with the corpora cardiaca (CC), restores a normal secretory dynamics of the M-NSC. Without reconnexion to the CC, the nervi corpori cardiaci interni (NCCI) do note regenerate or regenerate to form new nerve endings. In these cases, the secretory dynamics of the M-NSC remains more or less inhibited specially that of the A2 M-NSC which can be completely suppressed. A functional state of the A2 M-NSC could be necessary for the beginning of the vitellogenesis. In the CC, separated from the regenerating M-NSC, the A1 and A2 neurosecretory products are transformed into large globules which became intensively basophil before disappearance.
D000818:Animals; D001369:Axons / Q000601:surgery; D005260:Female; D006062:Gonadotropins / Q000378:metabolism*; D006110:Grasshoppers / Q000378:metabolism*; D006651:Histocytochemistry; D009416:Nerve Regeneration; D009490:Neurosecretory Systems / Q000378:metabolism*; D010053:Ovary / Q000254:growth & development; D015017:Yolk Sac / Q000502:physiology
D006062:Gonadotropins
Dynamique, après axotomie, des cellules neurosécretrices protocérébrales médianes A1 et A2 du criquet migrateur. I. Etude histophysiologique.