title: Annexin-A1 peptide down-regulates the leukocyte recruitment and up-regulates interleukin-10 release into lung after intestinal ischemia-reperfusion in mice.
abstract: BACKGROUND
  Intestinal ischemia/reperfusion (IR) injury is a serious and triggering event in the development of remote organ dysfunction, from which the lung is the main target. This condition is characterized by intense neutrophil recruitment, increased microvascular permeability. Intestinal IR is also responsible for induction of adult respiratory distress syndrome, the most serious and life-threatening form of acute lung injury. The purpose of this study was to investigate the effect of annexin-A1 protein as an endogenous regulator of the organ remote injury induced by intestinal ischemia/reperfusion. Male C57bl/6 mice were subjected to intestinal ischemia, induced by 45 min occlusion of the superior mesenteric artery, followed by reperfusion.
  
  
  RESULTS
  The intestinal ischemia/reperfusion evoked a high intensity lung inflammation as indicated by the number of neutrophils as compared to control group. Treatment with annexin-A1 peptidomimetic Ac2-26, reduced the number of neutrophils in the lung tissue and increased its number in the blood vessels, which suggests a regulatory effect of the peptide Ac2-26 in the neutrophil migration. Moreover, the peptide Ac2-26 treatment was associated with higher levels of plasma IL-10.
  
  
  CONCLUSIONS
  Our data suggest that the annexin-A1 peptidomimetic Ac2-26 treatment has a regulatory and protective effect in the intestinal ischemia/reperfusion by attenuation of the leukocyte migration to the lung and induction of the anti-inflammatory cytokine IL-10 release into the plasma. The anti-inflammatory action of annexin-A1 and its peptidomimetic described here may serve as a basis for future therapeutic approach in mitigating inflammatory processes due to intestinal ischemia/reperfusion.
authors.affiliation: Department of Biology; Institute of Biosciences, Letras e Ciências Exatas (IBILCE), São Paulo State University (UNESP), São José do Rio Preto, SP, 15054-000, Brazil.
authors.forename: Bruna Candido
authors.initials: BC
authors.lastname: Guido
authors.affiliation: Department of Biology; Institute of Biosciences, Letras e Ciências Exatas (IBILCE), São Paulo State University (UNESP), São José do Rio Preto, SP, 15054-000, Brazil.
authors.forename: Marianna
authors.initials: M
authors.lastname: Zanatelli
authors.affiliation: Department of Pharmacology, Institute of Biomedical Sciences (ICB), University of São Paulo (USP), São Paulo, 05508-900, Brazil.
authors.forename: Wothan
authors.initials: W
authors.lastname: Tavares-de-Lima
authors.affiliation: Department of Biology; Institute of Biosciences, Letras e Ciências Exatas (IBILCE), São Paulo State University (UNESP), São José do Rio Preto, SP, 15054-000, Brazil.
authors.forename: Sonia Maria
authors.initials: SM
authors.lastname: Oliani
authors.affiliation: Department of Basic Science in Health; Faculty of Medicine (FM), Federal University of Mato Grosso (UFMT), Mato Grosso, MT, 78060-900, Brazil.
authors.forename: Amílcar Sabino
authors.initials: AS
authors.lastname: Damazo