RESUMO
The present study aimed to investigate the effect of nano-microcapsule-basic fibroblast growth factor (bFGF) combined with hypoxia-inducible factor-1 (HIF-1) on the random skin flap survival of rats. Male Sprague-Dawley rats were used to establish the McFarlane flap model and subsequently, all model rats were randomly divided into four groups: Control, bFGF, HIF-1 and bFGF combined with HIF-1. The model rats were treated with 2.5 µg/day bFGF and 1.0 µg/day HIF-1 for 5 days by intraperitoneal injection. On day 5 following treatment, the boundaries between necrotic and surviving regions were significantly inhibited by bFGF combined with HIF-1. bFGF combined with HIF-1 inhibited oxidative stresses and inflammatory factors in random skin flap survival of rats. bFGF combined with HIF-1 also activated the protein expression levels of cyclooxygenase (COX)-2 and vascular endothelial growth factor (VEGF) in the random skin flap survival of rats. In conclusion, nano-microcapsule bFGF combined with HIF-1 prevented random skin flap survival in rats through antioxidative, anti-inflammatory and activation of the protein expression levels of COX-2 and VEGF.
Assuntos
Cápsulas/administração & dosagem , Fator 2 de Crescimento de Fibroblastos/administração & dosagem , Subunidade alfa do Fator 1 Induzível por Hipóxia/administração & dosagem , Anormalidades da Pele/tratamento farmacológico , Animais , Ciclo-Oxigenase 2/biossíntese , Fator 2 de Crescimento de Fibroblastos/química , Regulação da Expressão Gênica , Sobrevivência de Enxerto , Subunidade alfa do Fator 1 Induzível por Hipóxia/química , Masculino , Nanopartículas/administração & dosagem , Ratos , Ratos Sprague-Dawley , Anormalidades da Pele/patologia , Retalhos Cirúrgicos/patologia , Fator A de Crescimento do Endotélio Vascular/biossínteseRESUMO
The aim of this study was to establish whether the use of an extramedullary or intramedullary tibial cutting guide leads to superior mechanical leg axis and implant positioning. A meta-analysis of six randomized controlled trials including 350 knees was performed. For the mechanical axis, frontal tibial component angle and tibial slope, there were no significant differences in the mean values or the number of outliers (±3°) between the extramedullary and intramedullary groups. A reduced tourniquet time was associated with the intramedullary guide. No significant difference in the complication rate was noted between the two groups. Neither extramedullary nor intramedullary tibial alignment was more accurate in facilitating the tibial cut. Use of an intramedullary guide results in a shorter tourniquet time and exhibits a similar complication rate as the extramedullary guide.
Assuntos
Artroplastia do Joelho/métodos , Tíbia/cirurgia , Viés , Humanos , Radiografia , Ensaios Clínicos Controlados Aleatórios como Assunto , Tíbia/diagnóstico por imagem , Fatores de Tempo , TorniquetesRESUMO
The aim of this study was to establish whether the use of an extramedullary or intramedullary tibial cutting guide leads to superior mechanical leg axis and implant positioning. A meta-analysis of six randomized controlled trials including 350 knees was performed. For the mechanical axis, frontal tibial component angle and tibial slope, there were no significant differences in the mean values or the number of outliers (±3°) between the extramedullary and intramedullary groups. A reduced tourniquet time was associated with the intramedullary guide. No significant difference in the complication rate was noted between the two groups. Neither extramedullary nor intramedullary tibial alignment was more accurate in facilitating the tibial cut. Use of an intramedullary guide results in a shorter tourniquet time and exhibits a similar complication rate as the extramedullary guide.