ABSTRACT
OBJECTIVE: To determine the impact of a rapid and accurate rotavirus test in the emergency ward on the reduction of antibiotic prescription in children under 5 years old with acute diarrhea at "Arzobispo Loayza National Hospital", Lima, Peru. MATERIAL AND METHODS: We performed an observational prospective randomized controlled study, from July 2008 to January 2009. Stool samples from patients with diarrhea lasting less than 5 days were analyzed. Out of 201 cases, 101 were classified in Group A (with fecal leukocytes test performed) and 100 in Group B (with fecal leukocytes test and rotavirus/adenovirus test performed). We aimed to associate the signs and symptoms with the decision of prescribing antibiotics and with hospitalization risk. RESULTS: Both groups were comparable with regard to age, weight and illness duration. In patients with rotavirus infection, fecal leukocytes were positive in 46.9% of cases. Frequency of antibiotic use was directly associated with the number of fecal leukocytes (P<0.0001). There was a higher risk of admission in the group positive to rotavirus than in the group negative to this agent (21.9% vs. 6.3, P<0.0001). No diarrhea-attributable deaths were reported. CONCLUSION: The use of rotavirus test in the pediatric emergency room decreased antibiotic prescription in children with diarrhea.
Subject(s)
Anti-Bacterial Agents/therapeutic use , Chromatography, Affinity , Diarrhea/virology , Rotavirus Infections/diagnosis , Acute Disease , Adenoviridae Infections/complications , Adenoviridae Infections/diagnosis , Child, Preschool , Diarrhea/drug therapy , Emergency Service, Hospital , Health Services Misuse , Humans , Infant , Infant, Newborn , Leukocytes , Rotavirus Infections/complicationsABSTRACT
OBJETIVO: Evaluar el efecto de la disponibilidad de un método diagnóstico rápido y preciso de rotavirus sobre la frecuencia en el uso de antibióticos en niños menores de 5 años con diarrea aguda de menos de 5 días de duración del Hospital Nacional Arzobispo Loayza; Lima, Perú. MATERIALES Y MÉTODOS: se realizó un estudio observacional, prospectivo, aleatorizado, controlado, entre Julio 2008 y Enero 2009. Se asignó aleatoriamente 101 pacientes al Grupo A (con prueba de leucocitos fecales) y 100 al Grupo B (con prueba de leucocitos fecales y prueba rápida de rotavirus/adenovirus). Se evaluó en cada grupo la decisión clínica de administrar o no antibióticos. RESULTADOS: No existieron diferencias significativas en el tiempo de enfermedad, edad ni peso entre ambos grupos. Los casos de rotavirus tuvieron leucocitos fecales positivos en un 46.9%. El grado de positividad de los leucocitos fecales se asoció de manera directamente proporcional al uso de antibióticos (P<0.0001). El grupo positivo a rotavirus presentó un mayor riesgo de hospitalización que el grupo negativo a este agente (21.9% vs. 6.3%, P<0.0001). No se registraron muertes atribuibles a diarrea. CONCLUSIONES: La disponibilidad de un diagnóstico rápido y preciso de rotavirus en menores de 5 años con diarrea aguda, redujo significativamente el uso de antibióticos.
OBJECTIVE: To determine the impact of a rapid and accurate rotavirus test in the emergency ward on the reduction of antibiotic prescription in children under 5 years old with acute diarrhea at ôArzobispo Loayza National Hospitalõ, Lima, Peru. MATERIAL AND METHODS: We performed an observational prospective randomized controlled study, from July 2008 to January 2009. Stool samples from patients with diarrhea lasting less than 5 days were analyzed. Out of 201 cases, 101 were classified in Group A (with fecal leukocytes test performed) and 100 in Group B (with fecal leukocytes test and rotavirus/adenovirus test performed). We aimed to associate the signs and symptoms with the decision of prescribing antibiotics and with hospitalization risk. RESULTS: Both groups were comparable with regard to age, weight and illness duration. In patients with rotavirus infection, fecal leukocytes were positive in 46.9% of cases. Frequency of antibiotic use was directly associated with the number of fecal leukocytes (P<0.0001). There was a higher risk of admission in the group positive to rotavirus than in the group negative to this agent (21.9% vs. 6.3, P<0.0001). No diarrhea-attributable deaths were reported. CONCLUSION: The use of rotavirus test in the pediatric emergency room decreased antibiotic prescription in children with diarrhea.
Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Anti-Bacterial Agents , Anti-Bacterial Agents/therapeutic use , Diarrhea, Infantile , Adenoviridae Infections , Rotavirus Infections/diagnosis , Rotavirus , Prospective Studies , Observational Studies as TopicABSTRACT
BACKGROUND: Smooth muscle cell (SMC) proliferation in atherosclerosis is regulated through the interaction of growth factors like platelet-derived growth factor-BB (PDGF-BB) and insulin-like growth factor-1 (IGF-1) and their receptors (R). We hypothesized that serum starvation of SMCs may affect PDGFbeta-R and IGF-1-R expression and, consequently, the effect of their cognate ligands on SMC survival/proliferation. METHODS AND RESULTS: Serum starvation significantly increases PDGFbeta-R but not IGF-1-R mRNA and protein expression in SMCs. PDGF-BB stimulates cell survival but not proliferation in serum-starved SMCs of the synthetic phenotype, whereas SMCs of the contractile phenotype respond to PDGF-BB by a significant increase in proliferation. Immunohistochemical analysis of coronary atherosclerotic lesions reveals PDGFbeta-R expression in SMCs in the lamina fibromuscularis, but not in the media and in healthy parts of the arterial wall. No such differential expression was observed for IGF-1-R. CONCLUSIONS: Differential regulation of PDGFbeta-R and IGF-1-R expression by serum starvation might represent a mechanism for the control of SMC survival/proliferation in atherogenesis and restenosis. The distribution of PDGFbeta-Rs and IGF-1-Rs in atherosclerotic lesions may indicate an effect of serum starvation on SMCs in the arterial wall.
Subject(s)
Muscle, Smooth, Vascular/cytology , Muscle, Smooth, Vascular/physiopathology , Receptor, IGF Type 1/biosynthesis , Receptor, Platelet-Derived Growth Factor beta/biosynthesis , Becaplermin , Cell Proliferation , Cells, Cultured , Coronary Artery Disease/pathology , Coronary Artery Disease/physiopathology , Culture Media, Serum-Free , Down-Regulation , Humans , Platelet-Derived Growth Factor/pharmacology , Proto-Oncogene Proteins c-sis , Up-RegulationABSTRACT
OBJECTIVE: C-reactive protein (CRP) is the prototype acute phase protein and a cardiovascular risk factor. Interleukin-1beta (IL-1beta) and IL-6 stimulate CRP synthesis in hepatocytes. We searched for additional pathways regulating CRP expression. METHODS AND RESULTS: Primary human hepatocytes (PHHs) were treated with IL-1beta, IL-6, and protein kinase C (PKC) activator phorbol 12,13-dibutyrate (PDBu). CRP was analyzed by quantitative RT-PCR and ELISA. PDBu significantly induced CRP transcription by 21.0+/-9.24-fold and protein release by 2.9+/-0.5-fold. Transcriptional regulation was studied in detail in hepatoma G2 (HepG2) cells stably transfected with the 1-kb CRP promoter (HepG2-ABEK14 cells). In these cells, PDBu significantly induced CRP transcription by 5.39+/-0.66-fold. Competitive inhibition with bisindolylmaleimide derivative LY333531 abolished PDBu-mediated promoter activation. Competitive inhibition with IkappaB kinase inhibitor I229 also inhibited PDBu effects. Importantly, IL-8 significantly induced CRP release in PHHs by 58.675+/-19.1-fold, which was blockable by LY333531. CONCLUSIONS: This study describes a novel PKC-dependent transcriptional regulation of CRP gene expression, which, in analogy to the classical IL-1beta and IL-6 pathways, is operational in hepatocytes only. It also identifies IL-8 as a potential physiological PKC activator. HepG2-ABEK14 cells may be useful for high throughput screening to identify inhibitors of CRP synthesis for the prevention of cardiovascular disease.
