RESUMEN
OBJECTIVE: The aim of this study was to evaluate the chemopreventive potential of organoselenium compounds (Se I and Se II) in the well-established rat model treated with 7,12-dimethylbenz[a]anthracene (DMBA), by monitoring the extent of tyrosine hydroxylase (TH) activity, adrenomedullin (ADM) level and total RNA level in adrenal medulla. Organic pollutants are the most important environmental factor for the biologic systems. DMBA exposure appears to be associated with a number of physiological disease processes. METHODS: The effects of Se I and Se II compounds were investigated on TH activity, ADM and total RNA levels in adrenal medulla of rats exposed to DMBA. RESULTS: TH activity, ADM and total RNA levels were found to be increased significantly due to the effect of DMBA (p < 0.05). This increase was restricted in the Se I- and Se II-treated groups (p < 0.05). CONCLUSION: The present data showed that the organoselenium compounds may have important effects in the maintainance of homeostasis against stress induced by DMBA.
Asunto(s)
9,10-Dimetil-1,2-benzantraceno/toxicidad , Médula Suprarrenal/efectos de los fármacos , Sustancias Protectoras/farmacología , Selenio/farmacología , Médula Suprarrenal/química , Médula Suprarrenal/metabolismo , Adrenomedulina/análisis , Adrenomedulina/metabolismo , Análisis de Varianza , Animales , Femenino , ARN/análisis , ARN/metabolismo , Ratas , Ratas Wistar , Tirosina 3-Monooxigenasa/metabolismoRESUMEN
OBJECTIVE: There is growing evidence on the usefulness of biomarkers in the early detection of preterm infants at risk for brain damage. However, among different tools Activin A, S100B protein and adrenomedullin assessment offer the possibility to investigate brain/multiorgan function and development. This could be especially useful in perinatal medicine that requires even more non-invasive techniques in order to fulfill the minimal handling in diagnostic and therapeutic strategy performance. MATERIALS AND METHODS: The concept of Unconventional Biological Fluid (UBF: urine and saliva) is becoming even stronger and regards the assessment in non-invasive biological fluids of biochemical markers involved in the cascade of events leading to brain damage. RESULTS: Activin A, S100B protein and adrenomedullin in UBF were increased in preterm newborns developing brain damage and/or ominous outcome. CONCLUSIONS: The present manuscript offers an update on the usefulness of Activin A, S100B protein an adrenomedullin in UBF as brain damage markers. The findings open a new cue on the use of these markers in daily neonatal intensive care unit (NICU) activities.