Purpose <p>Since extract of the laminated layer (LL) from <i>E. granulosus</i> showed immuno-modulatory effects in vitro and in vivo, we sought to determine its effect on the onset, development, and evolution of experimental auto-immune uveitis (EAU). The latter is a model of some human diseases with ocular inflammation that can cause blindness.</p> Methods <p><i>E. granulosus</i> LL extract was either injected before EAU induction for the pretreated group or later for treated group. Ocular exploration was made by retinal histological and immunohistological (CD86, CD4, CD8) analysis. Myeloperoxidase (MPO), Superoxide dismutase (SOD), Catalase enzymatic activities (CAT), and Malondialdehyde (MDA), Nitric oxide (NO), Urea, and TNF-α levels were measured in plasma.</p> Results <p>LL injection attenuated retinal histological damage and reduced cells infiltration. Also, LL decreased systemic inflammatory and oxidative markers as well as TNF-α production and increased antioxidant parameters.</p> Conclusions <p>Interestingly, we observed a protective effect of <i>E. granulosus</i> LL extract during EAU. LL appears to ameliorate retinal damage by down-regulating inflammatory responses. Our results support LL immunomodulatory effects during autoimmune diseases and offer a promising prospect for helminthic therapy during autoimmune uveitis.</p>

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Laminated Layer Extract from Echinococcus Granulosus cyst Attenuates Ocular Damages and Inflammatory Responses in an Experimental Autoimmune Uveitis Model

  • Sara Djebbara,
  • Houda Belguendouz,
  • Imene Soufli,
  • Leila Hannachi,
  • Fahima Ameur,
  • Sara Benazzouz,
  • Sarra Benkhelifa,
  • Malika Terrahi,
  • Karima Achour,
  • Zine-Charaf Amir,
  • Manel Amri,
  • Chafia Touil-Boukoffa

摘要

Purpose

Since extract of the laminated layer (LL) from E. granulosus showed immuno-modulatory effects in vitro and in vivo, we sought to determine its effect on the onset, development, and evolution of experimental auto-immune uveitis (EAU). The latter is a model of some human diseases with ocular inflammation that can cause blindness.

Methods

E. granulosus LL extract was either injected before EAU induction for the pretreated group or later for treated group. Ocular exploration was made by retinal histological and immunohistological (CD86, CD4, CD8) analysis. Myeloperoxidase (MPO), Superoxide dismutase (SOD), Catalase enzymatic activities (CAT), and Malondialdehyde (MDA), Nitric oxide (NO), Urea, and TNF-α levels were measured in plasma.

Results

LL injection attenuated retinal histological damage and reduced cells infiltration. Also, LL decreased systemic inflammatory and oxidative markers as well as TNF-α production and increased antioxidant parameters.

Conclusions

Interestingly, we observed a protective effect of E. granulosus LL extract during EAU. LL appears to ameliorate retinal damage by down-regulating inflammatory responses. Our results support LL immunomodulatory effects during autoimmune diseases and offer a promising prospect for helminthic therapy during autoimmune uveitis.