Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Filtrar
1.
Rev Peru Med Exp Salud Publica ; 35(3): 449-455, 2018.
Artigo em Espanhol | MEDLINE | ID: mdl-30517505

RESUMO

OBJECTIVES: To assess the effects of the administration of oxytocin during labor management on the levels of malondialdehyde (MDA), nitric oxide (NO), and S100B protein in newborns. MATERIALS AND METHODS: We selected 80 term pregnant women without obstetric and fetal pathology, forming two groups: pregnant women with normal delivery and pregnant women conducted with oxytocin. Blood was collected immediately after delivery from the umbilical cord vein to measure MDA, ON and from the artery for protein S100B. The concentration of MDA and ON was quantified by spectroscopic methods and the protein S100B by ELISA. RESULTS: Values of 3.4 uMol/L and 3.6 uMol/L of MDA and 1.4 uMol/L and 1.8 uMol/L of NO were obtained in the oxytocin and control group, respectively, without significant difference; S100B levels were higher in the oxytocin managed group, with a median of 1.36 µg/L compared to the normal delivery group 1.11 µg/L (p=0.03). There was no relationship between the dose of oxytocin administered and the levels of MDA, ON, and S100B. CONCLUSIONS: There is no difference between MDA and NO levels between pregnant women undergoing a normal or managed birth. There is a significant difference in S100B protein levels in newborns born via an oxytocin-managed delivery. There is no relationship between oxytocin dose and levels of oxidative stress and S100B protein.


Objetivos. Evaluar los efectos de la administración de oxitocina en la conducción del parto en los niveles de malondialdehído (MDA), óxido nítrico (ON) y proteína S100B en el recién nacido. Material y Métodos. Se seleccionó a 80 gestantes a término sin patología obstétrica y fetal, formando dos grupos: Gestantes con parto normal y conducidas con oxitocina. Se extrajo sangre inmediatamente después del parto de la vena de cordón umbilical para medir MDA, ON y de la arteria para la proteína S100B. Se cuantificó la concentración de MDA y ON por métodos espectroscópicos y la proteína S100B por ELISA. Resultados. Se tuvo valores de 3,4 uMol/L y 3,6 uMol/L de MDA y 1,4 uMol/Ly 1,8 uMol/L de ON en el grupo conducido con oxitocina y control respectivamente sin diferencia significativa, los niveles de S100B fueron mayores en el grupo conducido con oxitocina, con una mediana de 1,36 µg/L comparado con el grupo de parto normal 1,11 µg/L (p=0,03). No hubo relación entre la dosis de oxitocina administrada y los niveles de MDA, ON y S100B. Conclusiones. No hay diferencia entre los niveles de MDA y ON entre las gestantes con parto normal y conducidas. Hay diferencia significativa en los niveles de proteína S100B en recién nacidos de parto con oxitocina. No hay relación entre la dosis de oxitocina y los niveles de estrés oxidativo y proteína S100B.


Assuntos
Sangue Fetal/química , Malondialdeído/sangue , Óxido Nítrico/sangue , Ocitócicos/farmacologia , Ocitocina/farmacologia , Subunidade beta da Proteína Ligante de Cálcio S100/sangue , Adulto , Estudos Transversais , Feminino , Humanos , Recém-Nascido , Trabalho de Parto , Masculino , Gravidez
2.
Rev. peru. med. exp. salud publica ; 35(3): 449-455, jul.-sep. 2018. tab
Artigo em Espanhol | LILACS | ID: biblio-978914

RESUMO

RESUMEN Objetivos. Evaluar los efectos de la administración de oxitocina en la conducción del parto en los niveles de malondialdehído (MDA), óxido nítrico (ON) y proteína S100B en el recién nacido. Material y Métodos. Se seleccionó a 80 gestantes a término sin patología obstétrica y fetal, formando dos grupos: Gestantes con parto normal y conducidas con oxitocina. Se extrajo sangre inmediatamente después del parto de la vena de cordón umbilical para medir MDA, ON y de la arteria para la proteína S100B. Se cuantificó la concentración de MDA y ON por métodos espectroscópicos y la proteína S100B por ELISA. Resultados. Se tuvo valores de 3,4 uMol/L y 3,6 uMol/L de MDA y 1,4 uMol/Ly 1,8 uMol/L de ON en el grupo conducido con oxitocina y control respectivamente sin diferencia significativa, los niveles de S100B fueron mayores en el grupo conducido con oxitocina, con una mediana de 1,36 μg/L comparado con el grupo de parto normal 1,11 μg/L (p=0,03). No hubo relación entre la dosis de oxitocina administrada y los niveles de MDA, ON y S100B. Conclusiones. No hay diferencia entre los niveles de MDA y ON entre las gestantes con parto normal y conducidas. Hay diferencia significativa en los niveles de proteína S100B en recién nacidos de parto con oxitocina. No hay relación entre la dosis de oxitocina y los niveles de estrés oxidativo y proteína S100B.


ABSTRACT Objectives. To assess the effects of the administration of oxytocin during labor management on the levels of malondialdehyde (MDA), nitric oxide (NO), and S100B protein in newborns. Materials and Methods. We selected 80 term pregnant women without obstetric and fetal pathology, forming two groups: pregnant women with normal delivery and pregnant women conducted with oxytocin. Blood was collected immediately after delivery from the umbilical cord vein to measure MDA, ON and from the artery for protein S100B. The concentration of MDA and ON was quantified by spectroscopic methods and the protein S100B by ELISA. Results. Values of 3.4 uMol/L and 3.6 uMol/L of MDA and 1.4 uMol/L and 1.8 uMol/L of NO were obtained in the oxytocin and control group, respectively, without significant difference; S100B levels were higher in the oxytocin managed group, with a median of 1.36 μg/L compared to the normal delivery group 1.11 μg/L (p=0.03). There was no relationship between the dose of oxytocin administered and the levels of MDA, ON, and S100B. Conclusions. There is no difference between MDA and NO levels between pregnant women undergoing a normal or managed birth. There is a significant difference in S100B protein levels in newborns born via an oxytocin-managed delivery. There is no relationship between oxytocin dose and levels of oxidative stress and S100B protein


Assuntos
Adulto , Feminino , Humanos , Recém-Nascido , Masculino , Gravidez , Ocitócicos/farmacologia , Ocitocina/farmacologia , Sangue Fetal/química , Subunidade beta da Proteína Ligante de Cálcio S100/sangue , Malondialdeído/sangue , Óxido Nítrico/sangue , Trabalho de Parto , Estudos Transversais
3.
Rev Peru Med Exp Salud Publica ; 27(4): 527-31, 2010.
Artigo em Espanhol | MEDLINE | ID: mdl-21308191

RESUMO

OBJECTIVE: To evaluate the vasodilator response of the hydroalcoholic extract of Zea mays L. (Andean purple corn) and to determine if this response is mediated by nitric oxide (NO). MATERIAL AND METHODS: We obtained an extract by maceration for eight days of Andean purple corn cobs in 70% ethanol and subsequent concentration of the product. Thoracic aortic rings were evaluated in an isolated organ chamber, bathed with Krebs-Hensleit solution (KH), and vasomotor activity was recorded with an isometric tension transducer. Basal contraction was produced with 120 mM KCl and then, we proceeded to determinate the vasodilator effect of 3 doses of the extract: 0.1, 0.5, and 1.0 mg/mL. We used L-NG-Nitroarginin methyl ester (L-NAME) to verify that the vasodilation depends on nitric oxide sinteasa (NOs). Then we compared the inhibition of vascular contraction after incubation for 30 minutes, with purple corn extract and captopril 10-5 M. RESULTS: We observed a reduction in maximum contraction (100%) to 85.25 ± 2.60%, 77.76 ± 3.23%, and 73.3 ± 4.87% for doses of 0.1, 0.5 and 1,0 mg/mL respectively. The vasodilation was inhibited by prior incubation with L-NAME. Andean purple corn extract did not inhibit vascular contraction as captopril did (reduction to 75.27 ± 8.61%). CONCLUSION: The hydroalcoholic extract of Zea mays L produces NO dependent vasodilation.


Assuntos
Valva Aórtica/efeitos dos fármacos , Óxido Nítrico/fisiologia , Extratos Vegetais/farmacologia , Vasodilatação/efeitos dos fármacos , Zea mays , Animais , Masculino , Ratos
5.
Rev. peru. med. exp. salud publica ; 27(4): 527-531, dic. 2010. ilus
Artigo em Espanhol | LILACS, LIPECS | ID: lil-573930

RESUMO

Objetivo. Evaluar la respuesta vasodilatadora e inhibidora de la vasoconstricción del extracto hidroalcohólico de Zea mays L. (maíz morado) y determinar si esta respuesta es mediada por óxido nítrico (NO). Materiales y métodos. Se obtuvo un extracto de las corontas de maíz morado maceradas durante ocho días en etanol al 70 por ciento, y posterior concentración del producto. Se trabajó con anillos aórticos de rata en cámara de órganos aislados, bañada con solución Krebs-Hensleit (K-H) y se registró la actividad vasomotora con un transductor de tensión isométrica. Se produjo una contracción basal con KCl 120 mM sobre la cual determinó el efecto vasodilatador de tres dosis del extracto: 0,1; 0,5 y 1,0 mg/mL. Se utilizó L-NG-Nitroarginina metil ester (L-NAME) para comprobar que la vasodilatación depende de la óxido nítrico sinteasa (NOs). Luego se comparó la inhibición de la contracción vascular tras la incubación durante 30 minutos, con extracto de maíz morado y captopril 10-5 M. Resultados. Se observó una reducción de la contracción máxima (100 por ciento) a 85,25 ± 2,60 por ciento, 77,76 ± 3,23 por ciento y 73,3 ± 4,87 por ciento, para las dosis de 0,1; 0,5 y 1,0 mg/mL, respectivamente. La vasodilatación fue inhibida por la incubación previa con L-NAME. El extracto de maíz morado no inhibió la contracción vascular, a diferencia del captopril (reducción a 75,27 ± 8,61 por ciento). Conclusión. El extracto hidroalcohólico de Zea mays L produce vasodilatación dependiente de la síntesis de NO.


Objective: To evaluate the vasodilator response of the hydroalcoholic extract of Zea mays L. (Andean purple corn) and to determine if this response is mediated by nitric oxide (NO). Material and methods: We obtained an extract by maceration for eight days of Andean purple corn cobs in 70 percent ethanol and subsequent concentration of the product. Thoracic aortic rings were evaluated in an isolated organ chamber, bathed with Krebs-Hensleit solution (KH), and vasomotor activity was recorded with an isometric tension transducer. Basal contraction was produced with 120 mM KCl and then, we proceeded to determinate the vasodilator effect of 3 doses of the extract: 0.1, 0.5, and 1.0 mg/mL. We used L-NG-Nitroarginin methyl ester (L-NAME) to verify that the vasodilation depends on nitric oxide sinteasa (NOs). Then we compared the inhibition of vascular contraction after incubation for 30 minutes, with purple corn extract and captopril 10-5 M. Results: We observed a reduction in maximum contraction (100 percent) to 85.25 ± 2.60 percent, 77.76 ± 3.23 percent, and 73.3 ± 4.87 percent for doses of 0.1, 0.5 and 1,0 mg/mL respectively. The vasodilation was inhibited by prior incubation with L-NAME. Andean purple corn extract did not inhibit vascular contraction as captopril did (reduction to 75.27 ± 8.61 percent). Conclusion. The hydroalcoholic extract of Zea mays L produces NO dependent vasodilation.


Assuntos
Animais , Masculino , Ratos , Valva Aórtica/efeitos dos fármacos , Óxido Nítrico/fisiologia , Extratos Vegetais/farmacologia , Vasodilatação/efeitos dos fármacos , Zea mays
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA