V Reny-Palasse

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Discovery of the potentiation of thyrotropin releasing hormone (TRH)-induced hyperthermia in mice by antidepressants which activate alpha-adrenergic systems instigated investigation of other relations between TRH and antidepressants. For this study the forced-swimming test using mice was chosen since this test is more sensitive for selection of(More)
1. It has been shown that thyrotropin releasing hormone (TRH) can potentiate the effects of the antidepressant, imipramine, as measured by the mouse forced-swimming test. This potentiation is not associated with an increase of effective levels of noradrenaline in the synaptic clefts, but depends upon the integrity of opioid systems. The present study was(More)
Recent data have indicated that the long-lasting increase in tyrosine hydroxylase (TH) protein could be differently expressed in the anterior and posterior locus coeruleus (LC) after a single intraperitoneal injection of RU24722, which has been proposed as a potent activator of catecholaminergic systems. In the present study, we have evaluated the dose and(More)
Mice were chronically treated with morphine or ethylketocyclazocine in order to induce a marked tolerance to their antinociceptive effect in the phenyl-p-benzoquinone writhing test. TRH (2 mg kg-1 i.p.) significantly reduced the number of writhes in non-tolerant mice, but did not alter the response of morphine- or ethylketocyclazocine-tolerant mice. TRH did(More)
Thyrotropin-releasing hormone (TRH) has an antinociceptive action in the rat. Antinociception was observed using a thermal stimulus (tail-flick test) after TRH administration into lateral ventricle, nucleus raphe magnus, nucleus reticularis paragigantocellularis and amygdaloid nuclei. This effect was short-lived since it was completely abolished 60 min(More)
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