Avaliação da atividade da alternagina C na inflamação crônica em camundongos

Abstract

Inflammation and angiogenesis act concomitantly in several chronic diseases. Most of steps of these processes are mediated by integration between extracellular matrix and integrin receptors. Alternagin-C (ALT-C), is a disintegrin-like derived from the venom of Bothrops alternatus. Studies with ALT-C have showed effects in cell adhesion mediated by collagen type I and ability of modulate growth factors associated integrin α2β1. Our aim was to investigate the effects of ALT-C on key components of inflammatory angiogenesis in the murine sponge model. Polyester-polyurethane sponges, used as framework for fibrovascular tissue growth, were implanted in Balb/c mice. Treatment with ALT-C inhibited the main components keys fibrovascular tissue (inflammation and angiogenesis) induced by synthetic subcutaneous implants and also changing the fibrogenic component. Anti-inflammatory effects were observed by inhibition of mast cell and NAG (macrophage activity), and also by the inhibition of cytokines TNF-α and MCP-1 and chemokine CXCL-1. The reduction in hemoglobin content, number of vessels and the concentrations of VEGF and FGF cytokines, have shown that ALT-C is also anti-angiogenic. All these factors show that Alt-C is a strong candidate for the development of anti-inflammatory and anti-angiogenic therapies