7 research outputs found

    NEBIVOLOL PREVENTS RESTENOSIS BY INHIBITING INFLAMMATION, PROLIFERATION AND PLATELET AGGREGATION IN HIGH GLUCOSE-INDUCED HUMAN SAPHENOUS VEIN GRAFTS

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    [No Abstract Available]Scientific Research Projects Coordination Unit, Ege University, Turkey [TDK-2020-21833]The authors would like to thank to the Scientific Research Projects Coordination Unit, Ege University, Turkey (B.Reel, TDK-2020-21833) for financial support

    Chronic oral nicotine administration and withdrawal regulate the expression of neuropeptide Y and its receptors in the mesocorticolimbic system

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    Neuropeptide Y (NPY) and its receptors are involved in the regulation of mood, stress, and anxiety. In parallel, NPY signaling may play a vital role in the negative affective state induced by drug withdrawal. This study examined the changes in the transcript levels of NPY, Y1, Y2, and Y5 receptors in the mesocorticolimbic system during chronic nicotine exposure and withdrawal. Rats were administered with nicotine (initial dose: 25 mu g/ml, maintenance dose: 50 mu g/ml, free base) in drinking water for 12 weeks. Control group received only tap water. In the final week of the study, some of the nicotine-treated animals continued to receive nicotine (0-W), whereas some were withdrawn for either 24 (24-W) or 48 (48-W) h. All animals were decapitated after the evaluation of somatic signs (frequency of gasps, eye blinks, ptosis, shakes, teeth chatter) and the duration of locomotor activity and immobility. mRNA levels of NPY, Y1, Y2, and Y5 receptors in the mesocorticolimbic system were measured by quantitative real-time PCR (qRT-PCR). Results showed that nicotine withdrawal increased overall somatic signs. Moreover, chronic nicotine treatment increased the duration of locomotor activity, whereas withdrawal increased the duration of immobility. qRT-PCR analysis revealed that chronic nicotine treatment increased NPY mRNA levels in the hippocampus. On the other hand, 24- and 48-h withdrawals increased NPY mRNA levels in the amygdala and medial prefrontal cortex (mPFC), Y1 and Y2 mRNA levels in the nucleus accumbens and mPFC, and Y5 mRNA levels in the mPFC. These findings suggest that nicotine withdrawal enhances NPY signaling in the mesocorticolimbic system, which could be an important mechanism involved in regulating the negative affective state triggered during nicotine withdrawal.This study was supported financially by Ege University Scientific Research Projects Coordination Unit (Project Numbers: 18-BAUM-001 and TYL-2019-20469) .Ege University Scientific Research Projects Coordination Unit [18-BAUM-001, TYL-2019-20469
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