Acute capsaicin injection increases nicotinamide adenine dinucleotide phosphate diaphorase staining independent of Fos activation in the rat dorsolateral periaqueductal gray
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Cited by (12)
Sleep loss mediates the effect of stress on nitrergic signaling in female mice
2021, Neuroscience LettersCitation Excerpt :A diaphorase defines an enzyme that can oxidize a reduced form of coenzyme NAD, for example, NADPH, which is a reduced form of NADP + . It has been shown that NADPH-d is a NOS [45]; thus, the intensity of NADPH-d staining provides an accurate measure of NOS activity [46–48]. Furthermore, NADPH-d staining has been used to show that NOS colocalizes in magnocellular cholinergic neurons in the MS and VDB of the rat basal forebrain [16].
The endocannabinoid, endovanilloid and nitrergic systems could interact in the rat dorsolateral periaqueductal gray matter to control anxiety-like behaviors
2015, Behavioural Brain ResearchCitation Excerpt :In fact, cannabinoid receptor agonists increase NO production due to stimulation of cyclic GMP and nNOS activity, as well as translocation of NO-sensitive guanylyl cyclase in neuronal cells [49,50]. Also, activation of TRPV1 receptors promoted NO formation in endothelial cells, placenta and in several limbic regions, such as the medial amygdala, paraventricular nucleus of hypothalamus and dlPAG [51,52,37,38,39]. In the same direction, behavioral studies showed that the flight responses induced by an NO donor were attenuated after AEA or a FAAH inhibitor administration into the dlPAG [48].
Modulation of defensive behavior by Transient Receptor Potential Vanilloid Type-1 (TRPV1) Channels
2014, Neuroscience and Biobehavioral ReviewsPeriaqueductal gray neuroplasticity following chronic morphine varies with age: Role of oxidative stress
2012, NeuroscienceCitation Excerpt :The relationship between maturation of GABAergic neurons in the vlPAG and nNOS may be interesting to understand with respect to the changing mechanisms of opioid actions with age. Furthermore, studies by Waterhouse group have demonstrated that stress (restraint) and painful stimuli (capsaicin) lead to the upregulation of NOS activity (as demonstrated by increased total NADPH-d staining intensity) in the LDTg, without a concomitant change in the mean number of neurons (Okere and Waterhouse, 2006a,b,c). This is in agreement with our report of a statistically significant increase in the average intensity of both nNOS immunohistochemistry and NADPH-d staining intensity per individual nNOS neuron in the vlPAG of the adult rat.