RESUMO
OBJECTIVE: Serum lipid and electrolyte imbalances are common in critically ill patients undergoing radiation therapy. Although multiple disease states and medication may be responsible for the development of these disorders, the aim of this research is to sequentially document the effect of total body radiation on body function utilizing the sequential changes in the serum lipids, electrolytes and protein in rats. METHODS: Serum protein and lipids contents were assessed using kits while electrolytes were assessed with flame photometry in rats exposed to total body irradiations of 1.27 Gy/min in cumulative doses to the fourth irradiation at five-day intervals. RESULTS: Total cholesterol and triacylglycerols serum levels were significantly reduced by irradiation (p < 0.05). No significant differences between experimental and control groups for HDL-C serum levels were detected. Serum electrolyte concentration remained within the normal range after each total body irradiation. Sodium, bicarbonate and chloride were significantly (p < 0.05) higher than control while potassium and creatinine were significantly reduced after the first irradiation only. Sodium/potassium ratio was significantly (p < 0.05) elevated. Serum protein was significantly (p < 0.05) elevated with increasing radiation. CONCLUSION: There are subtle but significant changes in serum lipids, electrolytes and protein after total body irradiation of normal rats. These variations could be due to non-specific stress reactions; as such, they are important markers in radiation induced injury diagnosis.
Assuntos
Proteínas Sanguíneas/análise , Eletrólitos/sangue , Lipídeos/sangue , Irradiação Corporal Total , Animais , Proteínas Sanguíneas/efeitos da radiação , Eletrólitos/efeitos da radiação , Lipídeos/efeitos da radiação , Masculino , Ratos , Ratos WistarRESUMO
OBJECTIVE: Total body irradiation (TBI) is a choice therapy for the management of some malignancies; it is also a major cause of oxidative stress. The aim of this research is to sequentially document the effect of total body radiation on body function utilizing the sequential changes in liver function enzymes and proteins in rats. METHODS: Serum protein and liver enzymes were assessed using kits in rats exposed to total body radiations of 1.27 Gy/minute in cumulative doses to the fourth radiation at five-day intervals. RESULTS: Aspartate aminotransferase (AST), alanine transaminase (ALT) and serum protein were significantly (p < 0.05) elevated with increasing radiation. No significant differences between experimental and control groups for bilirubin concentrations were noted at any time. Serum levels of albumin were significantly (p < 0.05) increased with the first to third radiation exposures but reduced at the fourth cumulative dose exposure. CONCLUSION: Variations are associated with acute stress, inflammation which could be due to non-specific stress reaction, while fluctuations could arise as a result of tolerance and repair within the liver. These tests are significant for diagnosis of radiation-induced injury and can be important for evaluation of its severity and correct management.
OBJETIVO: La irradiación corporal total (ICT) es una terapia de elección para el tratamiento de algunos tumores malignos. También es una de las causas principales del estrés oxidativo. El objetivo de esta investigación es documentar el efecto de la radiación corporal total sobre las funciones corporales utilizando los cambios secuenciales en las enzimas de la función hepática y las proteínas en las ratas. MÉTODOS: Se evaluaron las proteínas séricas así como las enzimas hepáticas mediante el uso de kits en ratas expuestas a radiaciones corporales totales de 1.27 Gy/minuto en dosis cumulativas hasta la cuarta radiación con cinco días de intervalo. RESULTADOS: La aspartato transaminasa (AST), la alanina aminotransferasa (ALT) y la proteína sérica fueron elevadas significativamente (p < 0.05) con el aumento creciente de la radiación. No hubo diferencias significativas entre el grupo experimental y el grupo control, observándose concentraciones de bilirrubina todo el tiempo. Los niveles séricos de albúmina aumentaron significativamente (p < 0.05) con la primera de tres exposiciones a la radiación, pero experimentaron una reducción a partir de la cuarta exposición de dosis cumulativa. CONCLUSIÓN: Las variaciones están asociadas con estrés agudo e inflamación que podría deberse a una reacción a estrés no específico, mientras que las fluctuaciones podrían surgir como resultado de la tolerancia y la regeneración dentro del hígado. Estas pruebas son importantes para el diagnóstico de lesiones inducidas por radiación, así como para la evaluación de la severidad y el tratamiento correcto de las mismas.
Assuntos
Animais , Masculino , Ratos , Fígado/enzimologia , Fígado/efeitos da radiação , Lesões Experimentais por Radiação/sangue , Irradiação Corporal Total/efeitos adversos , Alanina Transaminase/sangue , Aspartato Aminotransferases/sangue , Proteínas Sanguíneas/metabolismo , Fígado/fisiopatologia , Lesões Experimentais por Radiação/diagnóstico , Ratos WistarRESUMO
OBJECTIVE: Total body irradiation (TBI) is a choice therapy for the management of some malignancies; it is also a major cause of oxidative stress. The aim of this research is to sequentially document the effect of total body radiation on body function utilizing the sequential changes in liver function enzymes and proteins in rats. METHODS: Serum protein and liver enzymes were assessed using kits in rats exposed to total body radiations of 1.27 Gy/minute in cumulative doses to the fourth radiation at five-day intervals. RESULTS: Aspartate aminotransferase (AST), alanine transaminase (ALT) and serum protein were significantly (p < 0.05) elevated with increasing radiation. No significant differences between experimental and control groups for bilirubin concentrations were noted at any time. Serum levels of albumin were significantly (p < 0.05) increased with the first to third radiation exposures but reduced at the fourth cumulative dose exposure. CONCLUSION: Variations are associated with acute stress, inflammation which could be due to nonspecific stress reaction, while fluctuations could arise as a result of tolerance and repair within the liver These tests are significant for diagnosis of radiation-induced injury and can be important for evaluation of its severity and correct management.