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1.
Mediators Inflamm ; 2005(3): 139-43, 2005 Aug 14.
Article in English | MEDLINE | ID: mdl-16106099

ABSTRACT

Cisplatin (CDDP), an anticancer drug, induces remarkable toxicity in the kidneys of animals and humans and it has been well documented that reactive oxygen species and the renal antioxidant system are strongly involved in acute renal damage induced by CDDP. The aim of the present study was to investigate whether or not the renal antioxidant system plays also an important role in chronic renal damage induced by repeated doses of CDDP (1 mg/kg intraperitoneally twice weekly during 10 weeks in rats). In order to elucidate it, serum creatinine and urea levels, renal glutathione and thiobarbituric acid-reactive substances (TBARS) content, as well as renal superoxide dismutase and glutathione peroxidase activities were measured in the kidney homogenates of chronically CDDP-treated rats and additionally histological studies were performed in the rat kidneys. The chronic treatment with CDDP induced a significant increase in creatinine and urea levels in serum, but the other parameters mentioned above were not significantly modified as compared to the values in nontreated rats. Taking into account these results, we conclude that chronic CDDP administration induces also severe nephrotoxicity, in contrast to CDDP acute application, without any significant modification in the activity of relevant antioxidant enzymes such as superoxide dismutase and glutathione peroxidase, renal glutathione and lipid peroxides, by which the role of the antioxidant system in chronic nephrotoxicity induced by CDDP in rats is uncertain.


Subject(s)
Antineoplastic Agents/toxicity , Antioxidants/metabolism , Cisplatin/toxicity , Kidney Diseases/chemically induced , Kidney/drug effects , Lipid Peroxides/metabolism , Animals , Antineoplastic Agents/administration & dosage , Cisplatin/administration & dosage , Glutathione/metabolism , Humans , Kidney/cytology , Kidney/metabolism , Kidney/pathology , Kidney Diseases/metabolism , Kidney Diseases/pathology , Male , Rats , Rats, Sprague-Dawley , Superoxide Dismutase/metabolism , Thiobarbituric Acid Reactive Substances/metabolism , Tissue Extracts/chemistry , Urea/blood
2.
Brief Bioinform ; 6(2)Jun. 2005. ilus, tab
Article in English | CUMED | ID: cum-40020

ABSTRACT

Cisplatin (CDDP), an anticancer drug, induces remarkable toxicity in the kidneys of animals and humans and it has been well documented that reactive oxygen species and the renal antioxidant system are strongly involved in acute renal damage induced by CDDP. The aim of the present study was to investigate whether or not the renal antioxidant system plays also an important role in chronic renal damage induced by repeated doses of CDDP (1mg/kg intraperitoneally twice weekly during 10 weeks in rats). In order to elucidate it, serum creatinine and urea levels, renal glutathione and thiobarbituric acid-reactive substances (TBARS) content, as well as renal superoxide dismutase and glutathione peroxidase activities were measured in the kidney homogenates of chronically CDDP-treated rats and additionally histological studies were performed in the rat kidneys. The chronic treatment with CDDP induced a significant increase in creatinine and urea levels in serum, but the other parameters mentioned above were not significantly modified as compared to the values in nontreated rats. Taking into account these results, we conclude that chronic CDDP administration induces also severe nephrotoxicity, in contrast to CDDP acute application, without any significant modification in the activity of relevant antioxidant enzymes such as superoxide dismutase and glutathione peroxidase, renal glutathione and lipid peroxides, by which the role of the antioxidant system in chronic nephrotoxicity induced by CDDP in rats is uncertain(AU)


Cisplatino (CDDP), un fármaco contra el cáncer, induce notables de toxicidad en los riñones de los animales y los seres humanos y ha sido bien documentado que las especies reactivas de oxígeno y el sistema antioxidante renal están fuertemente implicados en el daño renal aguda inducida por CDDP. El objetivo del presente estudio fue investigar si el sistema antioxidante renal desempeña también un papel importante en el daño renal crónica inducida por dosis repetidas de CDDP (1 mg / kg por vía intraperitoneal dos veces a la semana durante 10 semanas en ratas). Con el fin de aclarar que, la creatinina sérica y los niveles de urea, renal y ácido tiobarbitúrico glutatión sustancias de reacción (TBARS) de contenidos, así como insuficiencia renal superóxido dismutasa y glutation peroxidasa actividades se midieron en el homogenado de riñón crónica CDDP-ratas tratadas y además histológico se han realizado estudios en la rata riñones. El tratamiento crónico con CDDP indujo un aumento significativo de los niveles de urea y creatinina en suero, pero los demás parámetros mencionados más arriba no se modificaron significativamente en comparación con los valores de nontreated ratas. Teniendo en cuenta estos resultados, concluimos que la administración crónica CDDP también induce nefrotoxicidad grave, en agudo contraste con CDDP solicitud, sin ninguna modificación significativa en la actividad de las enzimas antioxidantes como la superóxido dismutasa y la glutatión peroxidasa, glutatión renal y peróxidos lípidos, por que el papel del sistema antioxidante en la nefrotoxicidad crónica inducida por CDDP en ratas es incierto


Subject(s)
Animals , Rats , Antineoplastic Agents/administration & dosage , Antineoplastic Agents/toxicity , Antioxidants/metabolism , Cisplatin/administration & dosage , Cisplatin/metabolism , Cisplatin/toxicity , Kidney/cytology , Kidney , Kidney/metabolism , Urea/blood
3.
Mediators Inflamm ; 13(5-6): 307-12, 2004 Dec.
Article in English | MEDLINE | ID: mdl-15770045

ABSTRACT

BACKGROUND: Ozone therapy has become a useful treatment for pathological processes, in which the damage mediated by reactive oxygen species is involved. Several lines of evidence suggest that cisplatin-induced acute nephrotoxicity is partially mediated by reactive oxygen species AIMS: To analyze the effect of ozone administration after cisplatin-induced acute nephrotoxicity. METHODS: Male Sprague-Dawley rats were treated with five intra-rectal applications of ozone/oxygen mixture at 0.36, 1.1 and 1.8 mg/kg after cisplatin intraperitoneal injection (6 mg/kg). Serum and kidneys were taken off 5 days after cisplatin treatment. Creatinine was measured in the serum and the activities of antioxidant enzymes and thiobarbituric acid reactive substances and glutathione content were analyzed in renal homogenate. RESULTS: Ozone treatment diminished the increase in serum creatinine levels, the glutathione depletion and also reversed the inhibition of superoxide dismutase, catalase and glutathione peroxidase activities induced by cisplatin in the rat kidney. Also, the renal content of thiobarbituric reactive substances was decreased by ozone/oxygen mixture applied after cisplatin. CONCLUSION: Intrarectal applications of ozone reversed the renal pro-oxidant unbalance induced by cisplatin treatment by the way of stimulation to some constituents of antioxidant system in the kidney, and thereby it decreased the renal damage.


Subject(s)
Cisplatin/antagonists & inhibitors , Cisplatin/toxicity , Kidney/drug effects , Ozone/therapeutic use , Acute Kidney Injury/chemically induced , Acute Kidney Injury/metabolism , Acute Kidney Injury/pathology , Acute Kidney Injury/prevention & control , Animals , Antioxidants/metabolism , Catalase/metabolism , Creatinine/blood , Glutathione Peroxidase/metabolism , Kidney/injuries , Kidney/metabolism , Kidney/pathology , Lipid Peroxidation/drug effects , Male , Rats , Rats, Sprague-Dawley , Reactive Oxygen Species/metabolism , Superoxide Dismutase/metabolism
4.
Rev. cuba. farm ; 28(1): 45-54, ene.-jun. 1994. ilus, tab
Article in Spanish | CUMED | ID: cum-1696

ABSTRACT

Se estudia el efecto del propóleo rojo cubano en la hepatotoxicidad aguda inducida en ratones por una dosis oral elevada de 600 mg/kg de paracetamol. El propóleo a las dosis de 25,50 y 100 mg/kg por vía intraperitoneal disminuyó significativamente la actividad de la enzima alanino amino transferasa en suero, la cual había sido incrementada por elparacetamol solo, e incrementó la concentración de glutatión reducido en hígado de ratones, la cual es disminuida por el paracetamol. El propóleo también redujo el daño de hígado inducido por paracetamol en ratones, lo cual fue observado por microscopia óptica y microscopia electrónica. El efecto hepatoprotector fue independiente de la dosis y éste fue producido cuando el propóleo se administró 30 min antes que el paracetamol y 2 horas después que éste. Nuestros resultados evidencian que el propóleo rojo posee propiedades hepatoprotectoras en el modelo experimental utilizado (AU)


Subject(s)
Animals , Mice , Propolis/pharmacology , Cuba , Acetaminophen/toxicity , Liver , Liver/metabolism , Liver Diseases/chemically induced , Alanine Transaminase/metabolism , Glutathione/metabolism
5.
Rev. cuba. farm ; 28(1): 45-54, ene.-jun. 1994. ilus, tab
Article in Spanish | LILACS | ID: lil-149928

ABSTRACT

Se estudia el efecto del propóleo rojo cubano en la hepatotoxicidad aguda inducida en ratones por una dosis oral elevada de 600 mg/kg de paracetamol. El propóleo a las dosis de 25,50 y 100 mg/kg por vía intraperitoneal disminuyó significativamente la actividad de la enzima alanino amino transferasa en suero, la cual había sido incrementada por elparacetamol solo, e incrementó la concentración de glutatión reducido en hígado de ratones, la cual es disminuida por el paracetamol. El propóleo también redujo el daño de hígado inducido por paracetamol en ratones, lo cual fue observado por microscopia óptica y microscopia electrónica. El efecto hepatoprotector fue independiente de la dosis y éste fue producido cuando el propóleo se administró 30 min antes que el paracetamol y 2 horas después que éste. Nuestros resultados evidencian que el propóleo rojo posee propiedades hepatoprotectoras en el modelo experimental utilizado


Subject(s)
Animals , Mice , Acetaminophen/toxicity , Alanine Transaminase/metabolism , Cuba , Glutathione/metabolism , Liver , Liver/metabolism , Liver Diseases/chemically induced , Propolis/pharmacology
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