RESUMO
The extensive loss of skin in burned patients is a critical clinical condition, and the choice of an effective technique to cover and protect the damaged area has always been a challenge in the surgical field. Despite its wide clinical use, there is little data in the literature on using the Alexander technique to treat severe burns, while several studies have focused on alternative approaches. The present study aims to evaluate the effectiveness of the Alexander surgical technique on 117 patients with severe burns. The characteristics of the burned patients, factors related to etiology of burns as well as adverse prognostic factors and their incidence in discharged versus deceased patients were also taken into account. Finally, a comparison is made with an alternative surgical procedure described in the literature. Our results show a satisfactory level of survival for patients with severe burns surgically treated with the Alexander technique, accounting for 63% of all clinical cases reported here. This treatment is also less expensive and more rapid than the alternative approach we compared it with. The Alexander technique is a lifesaving method for the treatment of severe burns that provides a satisfactory chance of survival at lower cost than the alternative surgical procedure examined.
Une vaste perte de substance cutanée chez les brûlés détermine un état clinique critique, et le choix d'une technique efficace pour couvrir et protéger les zones détruites a toujours été un challenge chirurgical. Malgré sa large utilisation, il y a peu de références dans la littérature sur l'utilisation de la technique d'Alexander dans le traitement les brûlures graves, alors que différentes études insistent sur d'autres approches. Cette étude a pour but d'évaluer l'efficacité de la technique chirurgicale d'Alexander sur 117 patients présentant des brûlures graves. Les caractéristiques de ces brûlés (étiologie, facteurs pronostiques défavorables et leur incidence sur la sortie de l'hôpital) ont été prises en compte, comme celles des patients décédés. Enfin, la comparaison est faite avec les autres procédés alternatifs chirurgicaux décrits dans la littérature. Nos résultats montrent un taux satisfaisant de survie chez les patients présentant des brûlures graves traitées par la technique d'Alexander: 63% de tous les cas cliniques rassemblés ici. Le traitement est aussi moins cher et plus rapide que dans les techniques alternatives. La technique d'Alexander est une méthode de sauvetage pour le traitement des brûlures graves qui offre une chance satisfaisante de survie à un coût moindre que les autres techniques alternatives.
RESUMO
The E5 oncoprotein of the human papillomavirus type 16 (HPV16 E5) cooperates in cervical carcinogenesis and in epithelial transformation deregulating cell growth, survival and differentiation through the modulation of growth factor receptors. Among the epithelial receptor tyrosine kinases, the keratinocyte growth factor receptor/fibroblast growth factor receptor 2b (KGFR/FGFR2b) is a major paracrine mediator of epithelial homeostasis and appears to have an unique and unusual role in epithelial tissues, exerting a tumor-suppressive function in vitro and in vivo. With the aim to better elucidate the molecular events involved in the pathological activity of 16E5, we investigated if the viral protein would be able to affect the KGFR expression, signaling and turnover by interference with its degradative and recycling endocytic pathways. Quantitative reverse transcriptase-PCR and biochemical approaches on human keratinocytes transfected with 16E5-HA showed that E5 protein is able to induce KGFR down-modulation at both transcript and protein levels. Immunofluorescence microscopy in double-transfected cells expressing both E5 and KGFR revealed that the viral protein alters the receptor endocytic trafficking and triggers its endosomal sorting to the indirect juxtanuclear recycling pathway. The shift from lysosomal degradation to recycling at the plasma membrane correlates with a reduced phosphorylation of the fibroblast growth factor receptor substrate-2α tyrosine 196, the major docking site for Grb2-Cbl complexes responsible for receptor ubiquitination and degradation. 5'-Bromo-deoxyuridine incorporation assay demonstrated that expression of 16E5 induces a decrease in the growth response to the receptor ligands as a consequence of KGFR down-modulation, suggesting that 16E5 might have a role on HPV infection in perturbing the KGFR-mediated physiological behavior of confluent keratinocytes committed to differentiation.