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1.
Biol. Res ; 48: 1-11, 2015. graf
Artigo em Inglês | LILACS | ID: biblio-950820

RESUMO

BACKGROUND: Endometriosis, pro-inflammatory and invasive benign disease estrogen dependent, abnormally express in endometria the enzyme P450Arom, positively regulated by steroid factor-1 (SF-1). Our objective was to study the nuclear protein contents of upstream stimulating factor 2 (USF2a and USF2b), a positive regulator of SF-1, throughout the menstrual cycle in eutopic endometria from women with and without (control) endometriosis and the involvement of nuclear estrogen receptors (ER) and G-coupled protein estrogen receptor (GPER)-1. RESULTS: Upstream stimulating factor 2 protein contents were higher in mid (USF2b) and late (USF2a and USF2b) secretory phase in eutopic endometria from endometriosis than control (p < 0.05). In isolated control epithelial cells incubated with E2 and PGE2, to resemble the endometriosis condition, the data showed: (a) significant increase of USF2a and USF2b nuclear protein contents when treated with E2, PPT (specific agonist for ERa) or G1 (specific agonist for GPER1); (b) no increase in USF2 binding to SF-1 E-Box/DNA consensus sequence in E2-treated cells; (c) USF2 variants protein contents were not modified by PGE2; (d) SF-1 nuclear protein content was significantly higher than basal when treated with PGE2, E2 or G1, stimulation unaffected by ICI (nuclear ER antagonist); and (e) increased (p < 0.05) cytosolic protein contents of P450Arom when treated with PGE2, E2, PPT or G1 compared to basal, effect that was additive with E2 + PGE2 together. Nevertheless, in endometriosis cells, the high USF2, SF-1 and P450Arom protein contents in basal condition were unmodified. CONCLUSION: These data strongly suggest that USF2 variants and P450Arom are regulated by E2 through ERa and GPER1, whereas SF-1 through GPER1, visualized by the response of the cells obtained from control endometria, being unaffected the endogenously stimulated cells from endometriosis origin. The lack of E2 stimulation on USF2/SF-1 E-Box/DNA-sequence binding and the absence of PGE2 effect on USF2 variants opposite to the strong induction that they exert on SF1 and P450 proteins suggest different mechanisms and indirect regulations. The sustained USF2 variants protein expression during the secretory phase in eutopic endometria from women with endometriosis may participate in the pathophysiology of this disease strongly associated with infertility and its characteristic endometrial invasion to ectopic sites in the pelvic cavity.


Assuntos
Humanos , Feminino , Adulto , Aromatase/metabolismo , Expressão Gênica/genética , Endometriose/metabolismo , Endométrio/metabolismo , Estradiol/metabolismo , Biópsia , Immunoblotting , Estatísticas não Paramétricas , Endometriose/fisiopatologia , Endometriose/patologia , Endométrio/citologia , Células Epiteliais/metabolismo , Cultura Primária de Células , Ciclo Menstrual/metabolismo
2.
Rev. Fed. Odontol. Colomb ; (23): 9-15, oct. 2005.
Artigo em Espanhol | LILACS | ID: lil-421889

RESUMO

Se realizó un estudio experimental para evaluar la eficacia del esterilizador de esferas de vidrio para eliminar totalmente los microorganismos de fresas dentales antes, durante y después de procedimientos dentales. El estudio fue dividido en dos etapas: etapa de laboratorio y etapa clínica. En la etapa de laboratorio, 34 fresas estériles fueron contaminadas por inmersión con Bacillus subtlis. A continuación, se llevaron una a un esterilizador (246 a 250ºC) y a tiempos de 10, 15, 30 y 60 segundos; después, todas las fresas controles y tratadas se colocaron asépticamente en tubos de ensayo con caldo BHI (371C x 24 horas), para luego hacer resiembras en agar sangre. En la etapa clínica, 34 fresas estériles se usaron en procedimientos quirúrgicos, se lavaron y secaron y se esterilizaron durante 10 segundos. La mitad de las fresas controles y tratgadas se colocaron en caldo BHI (37ºC x 46 horas) y la otra mitad en caldo tioglicolato con parafina (37ºC x 72 horas). Del caldo BHI se hizo resiembra en agar sangre y del caldo tioglicolato en agar para anaerobios. Para ambas etapas se utilizaron fresas dentales como control positivo y negativo. En los casos en que se detectó crecimiento, se describieron las UFC, se hizo coloración de Gram e identificación microscópica de la bacteria. En la etapa de laboratorio no hubo crecimiento bacteriano. En la etapa clínica hubo crecimiento en cuatro fresas; los microorganismos fueron: Staphilococcus spp(2), Staphilococcus aureus y Corynebacterium spp. Los resultados demostraron que el esterilizador de esferas de vidrio es eficaz para eliminar totalmente los microorganismos de las fresas odontológicas. Sin embargo, fácilmente pueden cometerse errores cuando se aplica atendiendo pacientes


Assuntos
Bacillus subtilis , Contagem de Colônia Microbiana , Corynebacterium , Meios de Cultura , Estudo de Avaliação , Staphylococcus aureus
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