KMID : 0613820010110030259
|
|
Journal of Life Science 2001 Volume.11 No. 3 p.259 ~ p.265
|
|
Protection of Mercury induced Acute Respiratory Injury by Inhaled Oxidizing Agent
|
|
Hwang Tae-Ho
|
|
Abstract
|
|
|
Mercury vapor inhalation-induced acute respiratory failure(ARF) has been reported to be fatal. This study was designed to observe the possible mechanism of inhaled mercury vapor poisoning in the respiratory system. Sixty percent of rats(12/20) exposed to mercury vapor were dead within 72 hours of exposure whereas all the rats(20/20) exposed to mercury vapor combined with dithiothreitol(DTT) vapor survived. The histological observation showed that ARF was a direct cause of the death induced by mercury vapor inhalation, which was significantly circumvented by DTT vapor. Cyclic AMP mediated chloride secretion was inhibited by luminal side but not serosal side sulfhydryl blocking agents (Hf^{2+} rho-chloromercuribenzoic acid or rho-chloromercuriphenyl sulfonic acid) in a dose-dependent manner in a primary cultured rat airway monolayer. The inhibitory component of cAMP induced chloride secretion was completely restored by luminal side DTT(0.5mM). these results suggest that the oxidized form(Hg^{2+}) of mercury vapor(Hg0) contribute to ARF and subsequent death. The finding is important as it can provide important information regarding emergency manipulation of ARF patients suffering from by mercury vapor poisoning.ing.
|
|
KEYWORD
|
|
Mercury vapor, chloride secretion, airway epithelia, acute respiratory injury
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|