NEUROTOXICITY. “MSRVenv and syncytin-1 proteins share several biological features, and are potentially pathogenic. They have pro-inflammatory and superantigenic properties, and have been shown to cause neurotoxic effects in vitro and in human or transgenic animal models. The proteins may cause neuroinflammation, neurodegeneration, alterations of the immune system, and stress responses; both have been suggested as co-factors triggering the immuno-pathogenesis of MS.”
http://jidc.org/index.php/journal/article/view/26142666/1316