Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros










Intervalo de ano de publicação
1.
Oncogene ; 40(33): 5236-5246, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34239044

RESUMO

Despite the fact that AML is the most common acute leukemia in adults, patient outcomes are poor necessitating the development of novel therapies. We identified that inhibition of Thioredoxin Reductase (TrxR) is a promising strategy for AML and report a highly potent and specific inhibitor of TrxR, S-250. Both pharmacologic and genetic inhibition of TrxR impairs the growth of human AML in mouse models. We found that TrxR inhibition leads to a rapid and marked impairment of metabolism in leukemic cells subsequently leading to cell death. TrxR was found to be a major and direct regulator of metabolism in AML cells through impacts on both glycolysis and the TCA cycle. Studies revealed that TrxR directly regulates GAPDH leading to a disruption of glycolysis and an increase in flux through the pentose phosphate pathway (PPP). The combined inhibition of TrxR and the PPP led to enhanced leukemia growth inhibition. Overall, TrxR abrogation, particularly with S-250, was identified as a promising strategy to disrupt AML metabolism.


Assuntos
Via de Pentose Fosfato , Tiorredoxina Dissulfeto Redutase , Morte Celular , Ciclo do Ácido Cítrico , Glicólise , Humanos
2.
Acta méd. peru ; 37(4): 437-446, oct-dic 2020. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1278164

RESUMO

RESUMEN Objetivo: describir los principales factores asociados a la mortalidad en una cohorte de pacientes hospitalizados por neumonía por SARS-CoV-2 en un hospital público de Lima, Perú. Materiales y métodos: estudio de cohorte retrospectivo con muestreo no aleatorio por conveniencia. Se incluyó pacientes adultos con sospecha clínica o confirmados para SARS-CoV-2 con pruebas rápidas y/o moleculares. Se identificaron variables demográficas, clínicas, de laboratorio, tomográficas y de tratamiento. Se emplearon técnicas de estadística descriptiva, análisis bivariado y de regresión de Poisson para determinar el riesgo relativo (RR) ajustado. Resultados: se incluyó 122 pacientes, 70,5% del sexo masculino, edad promedio de 55,8 años, con antecedentes de obesidad (25,4%) e hipertensión arterial (HTA 13,1%). El análisis multivariado de los factores clínicos identificó que la edad (RR ajustado [RRa] 1,03; IC 95%: 1,00-1,06, p=0,021), el índice de masa corporal (IMC, RRa 1,03; IC 95%: 1,01-1,05; p=0,006), la HTA (RRa 1,68; IC 95%: 1,09-2,56; p=0,017), el índice de PaO2/FiO2 (RRa 0,99; IC 95%: 0,99-1,00; p<0,001), la exposición a lopinavir/ritonavir (RRa 0,83; IC 95%: 0,76-0,91; p<0,001), y corticoides sistémicos (RRa 1,18; IC 95%: 1,09-1,27; p<0,001) estuvieron asociados a la mortalidad de manera significativa. Conclusiones: la edad, IMC, HTA, índice PaO2/FiO2, y la exposición a corticoides y LPV/r estuvieron asociadas a la mortalidad en pacientes hospitalizados por neumonía por SARS-CoV-2.


ABSTRACT Objective: this study aimed to describe the main factors associated to mortality in a cohort of patients hospitalized with SARS-CoV-2 pneumonia in a public hospital in Lima, Peru. Materials and methods: this was a retrospective cohort study, with a non-random convenience sampling. Adult patients with confirmed/suspicious SARS-CoV-2 pneumonia with rapid and/ or molecular tests were included. Demographic, clinical, laboratory, tomographic and treatment variables were identified. Descriptive statistics, bivariate analysis, and Poisson regression techniques were used to determine the adjusted relative risk (aRR). Results: 122 patients were included, 70.5% were male, with a mean age of 55.8 years, with a history of obesity (25.4%) and high blood pressure (HBP, 13.1%). The multivariate analysis of clinical factors identified that age (aRR 1.03; 95% CI: 1,00- 1.06; p=0.021), body mass index (BMI; aRR 1.03; 95% CI: 1.01-1.05; p=0.006), HBP (aRR 1.68; 95% CI: 1.09-2.56; p=0.017), PaO2/FiO2 index (aRR 0.99; 95% CI: 0.99-1.00; p<0.001), exposure to lopinavir/ritonavir (LPV/r; aRR 0.83; 95% CI: 0.76-0.91; p <0.001), and systemic corticosteroids (aRR 1.18; 95% CI: 1.09-1.27; p<0.001) were significantly associated with mortality. Conclusions : Age, BMI, HBP, PaO2/FiO2 index, and exposure to corticosteroids and LPV/r were associated with mortality in our cohort of patients hospitalized with SARS-CoV-2 pneumonia.

3.
Artigo em Espanhol | LILACS-Express | LILACS, LIPECS | ID: biblio-1522447

RESUMO

Objetivo: Correlacionar la pérdida sanguínea estimada visualmente (PSev) con la pérdida sanguínea calculada (PSc) que se produce durante el parto por cesárea en pacientes nulíparas. Diseño: Estudio descriptivo de correlación. Institución: Hospital Nacional Cayetano Heredia, Lima, Perú. Participantes: Gestantes nulíparas con parto por cesárea. Intervenciones: Se revisó 160 historias clínicas de pacientes nulíparas atendidas de parto por cesárea a término, en el año 2011. Los datos obtenidos fueron analizados estadísticamente según el programa STATA V10,1 para Windows. Principales medidas de resultados: Pérdida sanguínea. Resultados: Las medianas de la PSev y de la PSc fueron 500 mL (500 a 600 mL) y 421,4 mL (319,85 a 559,65 mL), siendo estadísticamente diferentes, con p 1 000 mL, la mediana fue 1 207,80 mL (1 039,60 a 1 419,00 mL) y la mediana de PSev 500mL (500 a 600 mL), siendo estadísticamente diferente, con p < 0,001. La mediana de la caída del hematocrito fue 3% (3 a 4%). El coeficiente de correlación de Spearman para PSev y PSc fue 0,302 (p < 0,001). Conclusiones: Se halló correlación débil entre la PSev y la PSc, estadísticamente significativa. Para sangrado intraparto menor a 500 mL, la PSev fue sobreestimada, y para sangrado intraparto mayor a 1 000mL (hemorragia posparto), PSev fue subestimada. La estimación visual del sangrado intraparto es un método inexacto para calcular volúmenes sanguíneos, por lo cual se requiere métodos alternativos efectivos, que incluyen el uso de una fórmula que utiliza la estimación del volumen sanguíneo materno y la variación del hematocrito.


Objectives: To correlate visually estimated blood loss (vEBL) with calculated estimated blood loss (cEBL) during cesarean delivery in nulliparous women. Design: correlation retrospective study. Setting: Cayetano Heredia National Hospital, Lima, Peru. Participants: Nulliparous women subjected to cesarean section. Interventions: Medical records of 160 nulliparous women attended for cesarean deliveries at term during 2011 were reviewed. Data were statically analyzed with STATA V10.1 for Windows program. Main outcome measures: Blood loss. Results: Median vEBL and cEBL were respectively 500 mL (500-600 mL) and 421.4 mL (319.85-559.65 mL) with statistical significant difference, p 1 000 mL median was 1 207.80 mL (1 039.60-1 419.00 mL) and vEBL median was 500 mL (500-600 mL) with statistical significant difference, p < 0.001. Hematocrit descended 3% (3-4%). Spearman correlation coefficient between vEBL and cEBL was 0.302 (p < 0.001). Conclusions: A statistically significant weak correlation was found between vEBL and cEBL. For intrapartum bleeding less than 500 mL vEBL was overestimated and for intrapartum bleeding greater than 1 000 mL (post partum hemorrhage), vEBL was also underestimated. Visual estimation of intrapartum bleeding showed inaccurate to calculate blood loss volume. Effective alternatives methods are required that include an estimated maternal blood volume formula and changes in hematocrit.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...