Effect of nutritional status and ozone exposure on rat brain serotonin.

Background: Ozone is an environmental pollutant that has widely documented deleterious effects on exposed organisms. In Mexico City, this pollutant frequently reaches concentrations that surpass safe health limits. In addition, it has been reported that the prevalence of malnutrition remains high in our childhood population.

Effects of acute and chronic toluene inhalation on behavior, monoamine metabolism and specific binding (3H-serotonin and 3H-norepinephrine) of rat brain.

The present study deals with the effect of chronic toluene inhalation (30,000-40,000 ppm in air, 15 min/day for 30 days) that induced abnormal behavior states resembling the serotonin syndrome in rats: resting tremor, hindlimb abduction, Straub tail, head weaving and rigidity. The head weaving latencies were significantly decreased when assessed at 15 and 30 days of exposure to toluene vapors. The sequence pattern signs of serotonin syndrome were changed after 15 and 30 days of exposure, indicating possible cumulative effects and/or tolerance development.