Cytophotometric analyses of thalamic neuronal RNA in soman intoxicated rats

Lee J Martin, Jeffrey A. Doebler, Tsung Ming Shih, Adam Anthony

Research output: Contribution to journalArticle

Abstract

Quantitative azure B-RNA cytophotometry was used to monitor metabolic responses of individual neurons within the ventrobasal nuclear complex (VBC) and nucleus reticularis (NR) of the rat thalamus following administration of soman (0.5, 0.9 or 1.5 LD50, sc). A dose-dependent depression in brain acetylcholinesterase (AChE) was evidenced. With respect to thalamic RNA responses, a complex pattern of RNA alterations was evidenced, with these two regions generally exhibiting opposite patterns of dose-related RNA changes. With sub-lethal dosages of soman, RNA accumulation was evidenced in the acetylcholine (ACh) mediated excitatory VBC region and RNA depletion in the ACh mediated inhibitory NR neurons. With a lethal dose, an opposite RNA response pattern observed in both thalamic regions. It is postulated that the observed RNA response pattern with sub-lethal dosages of soman is what one would anticipate with cholinergic brainstem reticular formation activation. The absence of such a response with lethal doses strongly suggests some disruption of functional excitatory cholinergic activity and perhaps also an impairment of inhibitory cholinergic synaptic activity.

Original languageEnglish (US)
Pages (from-to)1593-1600
Number of pages8
JournalLife Sciences
Volume35
Issue number15
DOIs
StatePublished - Oct 8 1984
Externally publishedYes

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Soman
Rats
RNA
Cholinergic Agents
Ventral Thalamic Nuclei
Acetylcholine
Neurons
Cytophotometry
Reticular Formation
Lethal Dose 50
Acetylcholinesterase
Thalamus
Brain Stem
Brain
Chemical activation

ASJC Scopus subject areas

  • Pharmacology

Cite this

Cytophotometric analyses of thalamic neuronal RNA in soman intoxicated rats. / Martin, Lee J; Doebler, Jeffrey A.; Shih, Tsung Ming; Anthony, Adam.

In: Life Sciences, Vol. 35, No. 15, 08.10.1984, p. 1593-1600.

Research output: Contribution to journalArticle

Martin, Lee J ; Doebler, Jeffrey A. ; Shih, Tsung Ming ; Anthony, Adam. / Cytophotometric analyses of thalamic neuronal RNA in soman intoxicated rats. In: Life Sciences. 1984 ; Vol. 35, No. 15. pp. 1593-1600.
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