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Adenovirus-mediated transfer of viral IL-10 gene has potential to treat uveitis.

Vaccine Weekly

| January 01, 2003 | COPYRIGHT 2003 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2003 JAN 1 - (NewsRx.com & NewsRx.net) -- Gene therapy to promote systemic and local expression of viral interleukin 10 could have potential against uveitis, researchers say.

"Pathological ocular manifestations result from a dysregulation in the balance between proinflammatory type 1 cytokines and regulatory type 2 cytokines. Interleukin-10 (IL-10) is an anti-inflammatory cytokine with potent immunosuppressive effects.

"We have examined the efficiency of viral IL-10 adenovirus (Ad-vIL-10)-mediated gene transfer on experimental autoimmune uveoretinitis (EAU) induced in mice and rats by purified retinal autoantigens, respectively, interphotoreceptor binding protein (IRBP) and S-antigen (S-Ag)," said Y. Dekozak and colleagues, INSERM, Paris, France.

"B10-A mice that received a single unilateral injection of Ad-vIL-10 in the retro-orbital sinus venosus performed one day before immunization with IRBP in the footpads showed high levels of circulating vIL-10 in their sera and a significant reduction in pathological ocular manifestations," reported Dekozak and associates.

"Lower levels of IFN [interferon]-gamma and IL-2 were found in cellular supernatants from IRBP-stimulated splenic cells in these treated mice. The local effect on ocular disease of vIL-10 was neutralized completely by injection of a monoclonal anti-vIL-10 antibody, demonstrating the specificity of the treatment.

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