Functional neurotoxic effects in rats elicited by 3-nitropropionic acid in acute and subacute administration

Szabó, A [Szabó, Andrea (neurotoxikológia), szerző] Népegészségtani Intézet (SZTE / ÁOK); Papp, A [Papp, András (Neurobiológia), szerző] Népegészségtani Intézet (SZTE / ÁOK); Nagymajtényi, L [Nagymajtényi, László (Neurotoxikológia), szerző] Népegészségtani Intézet (SZTE / ÁOK)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 1382-6689 19 (3) pp. 811-817 2005
Konferencia: Ninth Meeting of the International Neurotoxicology Association (INA)
  • SJR Scopus - Medicine (miscellaneous): Q2
Azonosítók
Szakterületek:
    Changes possibly induced by 3-NP in electrophysiological functional characteristics of the central nervous system are, in contrast to biochemical and morphological alterations, less well known. In this study, the usability of a standard neurophysiological investigation system to detect functional changes caused by 3-NP administration in rats was studied. In subacute treatment, 10 or 15 mg/kg 3-NP was given i.p. on five consecutive days to groups of 10 rats and the effects were checked 4 weeks later. Acutely treated rats received 20 mg/kg i.p. after several control records. For recording, the animals' left hemisphere was exposed in urethane anesthesia. Silver electrodes were placed on the cortical sensory foci and tungsten needles in the subcortical (caudatum, globus pallidus) recording sites. Spontaneous electrical activity, as well as somatosensory, visual and auditory evoked potentials, were recorded. Following subacute treatment, the slowest (theta) and fastest (beta2 and gamma) frequencies of the spontaneous activity were changed, differently in the cortical versus subcortical sites. In the sensory evoked potentials after subacute treatment, an increase of the latency was seen in all sensory areas. In the acutely treated animals, the amplitude of the somatosensory evoked potential decreased after giving 3-NP. With double stimuli, the relation of the two responses was treatment- and interval-dependent. Understanding the mechanism of these effects may widen the knowledge base for using 3-NP in disease models. Š 2005 Elsevier B.V. All rights reserved.
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    2020-08-10 05:04