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  • Title: Changes of environment and darkness enhance the NADPH-diaphorase staining in the rat paraventricular nucleus.
    Author: Sánchez F, López MJ, del Campo J, Gutiérrez JL, Moreno MN, Vázquez R.
    Journal: Neuropeptides; 1999 Dec; 33(6):487-91. PubMed ID: 10657529.
    Abstract:
    Nitric oxide (NO) plays an important role in the maintenance of autonomic homeostasis of the body. NO-producing neurons are activated in the brain during exposure to different levels of environmentally produced stimulations. These facts prompted the authors to investigate the levels of activation of NO-producing neurons of the paraventricular nucleus of the hypothalamus (PVN) following change of environment and darkness. Cryostat sections were cut and processed for the histochemical detection of the NADPH-diaphorase (ND)-activity. Following change of the environment and darkness for 12 and 24 h, statistical analysis displayed a significant increase in the number of ND-neurons, especially in the posterior magnocellular and the lateral parvicellular subdivisions of the PVN. These data indicate that the ND-neurons of the PVN are influenced by changes of the environment and darkness.
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