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1.
Acta bioquím. clín. latinoam ; 29(1): 47-58, mar. 1995. ilus, tab
Article in Spanish | LILACS | ID: lil-152131

ABSTRACT

La actividad de la enzima ALAD en sangre, es uno de los parámetros más útiles para evaluar la exposición al plomo, por su sensibilidad y especificidad a los niveles de plomo sanguíneo y de los depósitos biológicamente activos. El estudio se orientó a obtener valores de referencia para esta enzima en la Provincia de Jujuy, y comprobar si están condicionados por la altitud, ya que Jujuy presenta un relieve con amplias variaciones altimétricas, entre 600 y 4.500 metros sobre el nivel del mar. Se estudiaron muestras de sangre de poblaciones de la Puna (3.500 metros de altitud), de la Quebrada de Humahuaca (2.800 metros) y valle de San Salvador de Jujuy (1.300 metros). Si bien se hallaron mayores niveles de ALAD (Método Europeo Estandarizado) en la Puna, se interpretó como una respuesta de los moradores de una zona libre de contaminación plúmbica, cuyas estrategias de supervivencia son diferentes a las de otras zonas. Deben considerarse valores de referencia únicos para la Provincia, independientemente de la altitud en que residan sus habitantes. Se establecen valores de referencia y valores límites normales para varones, mujeres y población general


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Altitude , Erythrocytes/enzymology , Lead Poisoning/diagnosis , Porphobilinogen Synthase/blood , Reference Values , Argentina , Lead Poisoning/blood , Lead/adverse effects , Porphobilinogen Synthase/analysis
2.
Indian J Exp Biol ; 1992 May; 30(5): 402-6
Article in English | IMSEAR | ID: sea-62071

ABSTRACT

Oral administration of trichloroethylene (TCE; 0, 500, 1000 and 2000 mg/kg/day) to male mice once daily, 5 days a week for a period of 28 days, caused a significant increase in liver weight, degeneration/necrosis of hepatocytes and characteristics proliferation of endothelial cells of hepatic sinusoids. Increase in kidney weight, glomerular nephrosis, degeneration/desquamation of tubular epithelium and characteristic amyloid deposition in glomeruli were observed only in the group of mice treated with 2000 mg/kg TCE. These changes occurred concurrently with a significant increase in total protein and free sulphydryl contents, elevated activities of acid phosphatase and catalase and decreased activity of delta-aminolevulinic acid dehydratase (delta-ALAD) indicating the sensitivity of liver and kidney as target tissues in TCE-toxicity. Hematological studies showed a significant increase in RBC counts and a reduction in WBC counts without any statistically significant change in the hemoglobin, urea nitrogen, creatinine and uric acid levels in the blood of TCE-exposed mice. A dose-related increase in cell density and acid phosphatase activity with a parallel significant decrease in the activity of delta-ALAD were observed in the bone marrow, which appear to be responsible for hematological alterations in TCE-exposed mice. The results suggest that early metabolic, pathological and hematological perturbations following a short-term exposure of TCE in mice, can provide the basis for its documented potential for chronic effects like blood dyscrasia and cancer.


Subject(s)
Animals , Body Weight/drug effects , Bone Marrow Diseases/chemically induced , Kidney/drug effects , Kidney Diseases/chemically induced , Liver/drug effects , Liver Diseases/chemically induced , Male , Mice , Organ Size/drug effects , Porphobilinogen Synthase/analysis , Proteins/analysis , Trichloroethylene/pharmacology
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